• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The embodiment of the invention provides an abrasion monitoring method for a fracturing cavity, and belongs to the technical field of monitoring the operating condition of fracturing equipment. The fracture cavity abrasion monitoring method comprises the steps of acquiring feedback signals having cavity characteristics of the fracturing cavity and acquired at all detection nodes located at different positions of the fracturing cavity, and the next step is performed when the feedback signal satisfies a first preset monitoring condition. ; the current detection node is selected, local cavity characteristics of the fracture cavity are determined according to intra-node characteristics between the current detection node and the adjacent detection node, the feedback signal from the current detection node and the feedback signal from the adjacent detection node; and when the local cavity characteristics satisfy a second preset monitoring condition, the second step is performed again to form a cyclic monitoring process. According to the fracture cavity abrasion monitoring method, the abrasion state of a liner plate and the structural shape changes of the fracturing cavity are monitored according to the characteristics at detection points and the local characteristics of the current detection position, the life of the liner plate can be predicted, and conditions are created for a reasonable planning of operation and maintenance of a crushing machine.
    公开号:BE1027148B1
    申请号:E20205231
    申请日:2020-04-08
    公开日:2021-06-22
    发明作者:Xiaoyan Luo；Haohua Chen；Xianneng Hu；Xin Liu；Gaipin Cai
    申请人:Univ Jiangxi Sci & Technology；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION The present disclosure relates to the technical field of monitoring operating conditions of crushing equipment, and more particularly relates to an abrasion monitoring method and structure for a fracture cavity.
    Background of the Invention A working mechanism of a crushing machine consists of a fixed liner plate and a movable liner plate. An area between the working surfaces of the two liner plates is a fracturing cavity. In a fracturing process, the movable liner plate pivots with respect to the fixed liner plate according to a rule to fracture a material in the fracturing cavity, so as to cause the particle size of the material to constantly decrease until the material is discharged from the fracturing cavity.
    In the crushing process, the material in the crushing cavity abrades the fixed liner plate and the movable liner plate, and this abrasion changes the shape of the crushing cavity, leading to a quality deterioration of a broken product. There are mainly two evaluation methods for the abrasion degrees of the liner plates and distribution areas thereof. One method is to judge abrasion conditions of the liner plates according to the ore crushing amount, discharge granularity, the operating hours of the liner plates and the like, and the other method is to disassemble the crushing equipment to accurately judge the abrasion conditions of the liner plates. Obviously, the first method can only perform a fuzzy prediction of the abrasion states of the liner plates, and cannot determine an abrasive portion of each liner plate, so that it is difficult to provide an effective guideline for fracturing production. The second method can obtain a direct result of the abrasion conditions of the liner plates, but disassembling the crushing equipment has a high workload and time, which will seriously affect the production of the crushing process.
    The automatic control aspect of the crushing process mainly has the following technologies related to the present disclosure: The first technology involves a first crushing machine control unit in China, which is a crushing machine control unit produced by SINOSTEEL MAANSHAN INSTITUTE OF MINING RESEARCH CO., LTD in combination with an automatic control technology. The control unit realizes load control 40 and fault diagnosis and protection of a crushing machine, and promotes fine crushing yield and granularity to be improved, and crushing energy consumption and equipment errors are both reduced.
    The second technology involves a cone crusher and a control system thereof. The system realizes monitoring the oil level of a lubrication system, the cleanliness of lubricating oil and temperatures of lubricated parts, and detecting pressure, temperature, flow, differential pressure and the liquid level of a hydraulic system of the crushing machine, and can use the hydraulic system to automatically adjust the size of a neck. Further, a breaking load is effectively monitored by developing a power control unit.
    The third technology involves a programmable logic control unit (PLC) and WINCC-based cone crusher control technology. This technology uses a two-stage three-layer architecture that combines a top computer and a control unit. The upper computer mainly realizes functions such as programming, configuration and monitoring. A lower computer consists of a PLC and controlled equipment to realize automatic neck adjustment and comprehensive monitoring of the crushing process.
    The fourth technology involves intelligent cone crusher control system. The system adopts Siemens S7-200smart PLC as a control core and WINCC as upper computer configuration software, and has the functions of data acquisition, automatic process control, recording, storage and display of equipment operating state information, alarming and so on.
    The fifth technology involves a PLC-based crushing machine control system. The system adopts a touch screen as a human-machine interface. The system detects the neck of the cone crusher by means of a position transmitter, detects the temperature of the lube oil by means of a temperature transmitter, detects the pressure of the lube oil by means of a pressure transmitter, and detects the power of a drive motor by means of a power transmitter . A PLC adopts a fuzzy control model for outputting a certain control amount according to acquired data, adjusts the rotational speed of an ore feeding motor by a frequency converter, and adjusts the size of the neck by means of a servo valve of the hydraulic system, thereby achieving a goal of controlling the working load of the crushing machine so that it is stable.
    The research on automatic control of crushing machines took place abroad much earlier than in China. Products from crushing machine manufacturers, such as Svidala, Sandvik and Fullersmith, have a high degree of automation. HP series crushers, especially HP500 and HP800 crushers, developed by Metso, have been widely introduced and applied in the crushing machine industry of China, which has greatly improved the crushing ratio and crushing handling capacity.
    By the above analysis, it has been found that the existing crushing machine control technology only involves detection and control of crushing machine operating parameters, equipment state parameters and crushing process parameters, and does not involve fracturing liner plate distance detection.
    With effective integration and application of wireless sensing technology, automatic control technology and crushing device technology, the main patents related to this technology include: ZigBee wireless technology based intelligent remote monitoring system (CN2014 10475207.4) of crushing machine: This system consists of a computer, a personal computer (PC), a coordinator node, an RS232, a wireless node sensor and the like. Sensors, control units and drive equipment distributed throughout the crusher are connected via a wireless ZigBee module to form a measurement and control network for remotely controlling and managing a conveyor belt, a feeder, a primary crusher, a round vibrating screen and a secondary crushing machine. This patent technology realizes a remote control of a refractive operation procedure, but does not include intelligent liner plate abrasion detection technology.
    A crushing machine automatic control system (CN201510292022.4): This system consists of acousto-optical detection, operating condition monitoring, control operation and signal standardization modules, a central control module, an optimization processing module, a historical database and the like. The operating parameters of the crushing machine, the production process parameters, the equipment state parameters and the like can be monitored and optimally controlled, so that intelligent control of the crushing machine is better realized. This patent technology also does not include the intelligent detection technology of the liner plate abrasion.
    The above patent technologies related to the present disclosure do not involve actual monitoring of the abrasion degrees of the liner plates, and an analysis method of the change of the fracture cavity caused by the liner plate abrasion. Therefore, how a wireless detection technology and an ultrasonic distance measuring principle can be used to develop a wireless technology for monitoring the liner plate abrasion and examining the change of the fracture cavity is a problem to be solved by those skilled in the art.
    Summary of the Invention The embodiments of the present disclosure are directed to providing a fracture cavity abrasion monitoring method and a monitoring structure thereof, and aiming at solving the technical problems that the life of liner plates cannot be updated and predicted. according to a dynamic use of a crushing machine, that liner plates about to reach abrasion limits cannot be replaced or maintained in advance, that local area properties between detection nodes cannot be monitored, and that the crushing machine has the high operating cost and high abrasion rate.
    To achieve the above object, the embodiments of the present disclosure provide the fracture cavity abrasion monitoring method and monitoring structure thereof.
    A method of monitoring, by a serving node, a fracturing cavity is provided. The monitoring method comprises the following steps: S1) acquiring a feedback signal having fracture cavity cavity shape properties from each of the detection nodes at different positions of the fracture cavity, and performing the next step when the feedback signal satisfies a first preset monitoring condition; S2) selecting the current detection node, and determining local cavity shape properties of the fracture cavity according to inter-node properties of the current detection node and an adjacent detection node, the feedback signal from the current detection node and the feedback signal from the adjacent detection node; and S3) jumping to step S2) when the local cavity shape properties meet a second preset monitoring condition, thereby forming a cyclic monitoring process.
    Optionally, the step S1) includes: S101) transmitting a first sound wave signal to each of the detection nodes at different positions of the fracturing cavity, and receiving a second sound wave signal reflected from each detecting node; S102) for each detecting node, acquiring a feedback signal having a distance property from the cavity wall of the fracturing cavity to the current corresponding detecting node according to the first sound wave signal and the second sound wave signal corresponding to the first sound wave signal; and S103) preset a minimum distance and a ratio threshold, then setting a ratio of the number of feedback signals less than or equal to the minimum distance to a total number of feedback signals within the ratio threshold as the first preset monitoring condition, and performing step S2) when the feedback signal satisfies the first preset monitoring condition. The ratio threshold may be designed such that there is at least one feedback signal out of all the feedback signals and that the distance property characterized by the at least one feedback signal is less than or equal to the minimum distance.
    Optionally, the step S2) includes: S201) selecting a current detection node; S202) measuring first inter-node distances from the current detection node and an adjacent detection node on a liner plate face within the fracturing cavity and second inter-node distances from the current detection node and an adjacent detection node on a liner plate face outside the fracturing cavity as inter-node properties; S203) acquiring a first node distance from the current detection node to the liner plate working plane within the fracturing cavity according to a feedback signal from the current detecting node, and acquiring a second node distance from the adjacent detecting node to the liner plate working plane within the fracturing cavity according to a feedback signal from the adjacent detection node; and S204) forming at least one polygon by the first inter-node distances, the second inter-node distances, the first node distance and the second node distance, and taking a current area of the at least one polygon as a current local cavity shape property of the fracture cavity.
    Optionally, step S3): S301) includes pre-setting an abrasion threshold, inquiring first initial inter-node distances, second initial inter-node distances, a first initial node distance and a second initial node distance to at least one initial polygon forming, and taking an initial area of the at least one initial polygon as an initial local cavity shape property of the fracturing cavity; S302) acquiring an area ratio of the current area of the at least one polygon to the initial area of the at least one initial polygon, and taking the area ratio as a degree of abrasion; and S303) setting the abrasion degree that is within the abrasion threshold as a second preset monitoring condition, and jumping to step S2) when the abrasion degree satisfies the second preset monitoring condition, thereby forming the cyclic monitoring process.
    The embodiment of the present disclosure further provides a method of monitoring, by a detection node, a fracturing cavity. The monitoring method includes the following steps: S1) transmitting a distance measurement signal to a liner plate working face of a fracturing cavity, and then acquiring a reflected signal corresponding to the distance measurement signal; and S2) acquiring a time delay feature signal having cavity shape feature information according to the distance measurement signal and the reflected signal, and transmitting the time delay feature signal to a serving node to enable the serving node to generate a feedback signal according to the time delay feature signal acquire. The first preset monitoring condition is that a large number of detection nodes are simultaneously smaller than a minimum distance, but if a local area is perforated, the local area may only be detected by a current surface here. Even if the local area of a liner plate is found to be defective, properties such as input materials can be pre-adjusted to better match the input materials to the fracture cavity.
    Optionally, step S1) includes: S101) receiving a drive signal selectively transmitted by a serving node; and S102) transmitting a sound wave distance measurement signal to a fracturing cavity liner plate work surface according to the driving signal, and then acquiring a reflected sound wave signal corresponding to the sound wave distance measurement signal.
    Optionally, step S102) further comprises: transmitting an inter-node sound wave distance measurement signal to an adjacent detecting node according to the driving signal to enable the adjacent detecting node to acquire the inter-node sound wave distance measuring signal. For example, if the local abrasion boundary is considered just before the abrasion threshold, the abrasion in this local area will show a concave arc, or even a perforation, toward the trough toward the outside of the fracture cavity compared to other unabraded liner plate surfaces . The inter-node distance between the current node and adjacent nodes on the work plane with respect to the size and depth of the concave arc will change to a greater or lesser extent, so that the local abrasion between the nodes at time can be found.
    Optionally, in step S2), when the time delay feature signal is sent to the serving node, a temperature signal is also sent to the serving node.
    The embodiment of the present disclosure further provides a method for finding an abrasion through a service node of a fracturing cavity. The method comprises the following steps: S1) acquiring a feedback signal having fracture cavity cavity shape properties from each of the detection nodes at different positions of the fracturing cavity, transmitting a first abrasion state signal having liner plate life information when the feedback signal does not satisfy a first preset monitoring condition, or performing the next step when the feedback signal satisfies the first preset monitoring condition; S2) selecting the current detection node, and determining local cavity shape properties of the fracture cavity according to inter-node properties of the current detection node and an adjacent detection node, the feedback signal from the current detection node and the feedback signal from the adjacent detection node; and S3) jumping to step S2) when the local cavity shape properties meet a second preset monitoring condition, thereby forming a cyclic monitoring process, or transmitting a second abrasion state signal 40 having local liner plate abrasion information when the local cavity shape values properties do not meet the second preset monitoring condition. If the local area does not have a severe abrasion phenomenon such as perforation, this alarm may prompt a worker to inspect the input materials more carefully beforehand, and to remove too hard mismatched materials to avoid further abrasion in more areas.
    The embodiment of the present disclosure further provides the service node for monitoring the fracture cavity, comprising: a calculation device configured to calculate a feedback signal change property of each of the detection nodes at different positions of the fracture cavity, which has a function to determining whether the fracturing cavity is abraded according to a relationship between the feedback signal change property and preset monitoring conditions, and local cavity shape properties consisting of feedback signal properties and a distance property between the adjacent detection nodes, selectively outputting a driving signal to each detection node, and receiving of the feedback signal having the cavity shape properties of the fracturing cavity from each detection node. Optionally, the calculating device comprises: an upper computer for calculating the feedback signal change property, which has a function to judge whether the fracture cavity is abraded according to the ratio and the local cavity shape characteristics; an acquisition driving circuit for receiving a driving signal selectively sent from the upper computer, generating a range measurement signal from the driving signal, and respectively transmitting the range measurement signal to each detecting node: the acquisition driving circuit corresponding to the reflection signal of each detecting node receives the distance measurement signal, respectively, and obtains a feedback signal corresponding to each detection node from the distance measurement signal and the reflection signal. The acquisition driver further transmits the feedback signal to the upper computer. Optionally, the acquisition driving circuit comprises: a receiving circuit; a processor, which receives the drive signal selectively sent from the top computer, and which generates the range measurement signal from the drive signal; a transmitting circuit corresponding to the operating frequency of the receiving circuit; wherein the transmitter respectively transmits the distance measurement signal to each of the detection nodes by means of the transmitting circuit;
    wherein the processor receives the reflection signal from each detecting node by means of the receiving circuit corresponding to the range measurement signal; wherein the processor obtains a feedback signal corresponding to each detection node from the range measurement signal and the reflection signal. Optionally, the top computer includes: a first radio frequency circuit; the upper computer sends the drive signal to the acquisition driver circuit through the first radio frequency circuit, or the upper computer receives the feedback signal sent from the acquisition driver circuit through the first radio frequency circuit.
    Optionally, the acquisition driving circuit comprises: a second radio frequency circuit corresponding to the operating frequency of the first radio frequency circuit; wherein the processor receives the drive signal selectively sent from the upper computer through the second radio frequency circuit and transmits the feedback signal to the upper computer through the second radio frequency circuit.
    The embodiment of the present disclosure further provides the detection nodes for monitoring the fracture cavity, comprising: a transmitter, which receives a distance measurement signal transmitted from the serving node, generates a distance measurement pulse through the distance measurement signal, and transmits the distance measurement pulse to a liner plate work face of the fracture cavity; and a receiver, which receives a reflected pulse reflected from the liner plate face of the fracture cavity, generates a reflected signal from the reflected pulse, and transmits the reflected signal to the serving node.
    Optionally, the transmitter comprises a transmitting chip of an ultrasonic distance measuring sensor. The receiver comprises a receiving chip of the ultrasonic distance measuring sensor.
    Optionally, the transmitter and/or receiver are installed in a blind hole opened in the outer liner plate of the fracturing cavity.
    Optionally, the blind hole is further filled with a coupling agent; The blind holes are spaced in the fracturing cavity outer liner plate by a preset interval along the direction of the material fracturing displacement vector.
    The embodiment of the present disclosure further provides a liner plate life prediction method based on the service node, comprising the steps of: S1) selecting a detection node group in the liner plate, selecting the current detection node, and calculating an abrasion degree of a liner plate area wherein the detection node group is present, by acquiring the feedback signal from each detection node in the detection node group and the inter-node properties of the current detection node and the detection node adjacent to the current detection node; and S2) determining a remaining life of the liner plate according to the degree of abrasion.
    The embodiment of the present disclosure further provides a method for generating a current cavity shape of the fracturing cavity based on a service node, comprising the steps of: S1) selecting the detection node group in the fracturing cavity, selecting the current detection node, selecting calculating a change vector of a local area of the fracture cavity in which the detection node group is present, by acquiring the feedback signal from each detection node in the detection node group and the inter-node properties of the current detection node and the detection node adjacent to the current detection node, and updating coordinates of the local area of the fracture cavity in which the detection node group resides; and S2) generating a current cavity shape of the fracturing cavity according to the coordinates of the local area.
    In another aspect, the embodiment of the present disclosure further provides an apparatus for realizing the service node, comprising: at least one processor; and a memory connected to the at least one processor, the memory storing an instruction executed by the at least one processor, and the at least one processor implementing the above method by executing the instruction written in the memory is stored.
    In another aspect, the embodiment of the present disclosure further provides an apparatus for realizing the detection nodes, comprising: at least one processor; and a memory connected to the at least one processor, the memory storing an instruction executed by the at least one processor, and the at least one processor implementing the above method by executing the instruction written in the memory is stored.
    In another aspect, the embodiment of the present disclosure further provides a computer-readable storage medium on which a computer instruction is stored. When the computer instruction is executed on a computer, the computer implements the above method.
    By the above-mentioned technical solutions, the embodiments of the present disclosure have the following beneficial effects: 1) A wireless intelligent multi-level monitoring system, consisting of an ultrasonic lining plate thickness measurement on the lower layer and an analysis monitoring of an upper computer, is built by using an ultrasonic thickness measurement method and a wireless detection technology, so that a measurement requirement for a liner plate thickness in a closed and narrow space can be met; 2) The abrasion state of the liner plate inside crushing equipment and a change of the crushing cavity shape structure can be monitored in real time without disassembling the crushing equipment, so as to solve the problem of low prediction accuracy for the life of the liner plate of the current crushing equipment ; 3) a local detection area is constructed according to a distance between the detection nodes and a thickness from each detection node to the liner sheet metal working surface, so that local abrasion problems of areas between the partial detection nodes and the adjacent detection nodes can be found directly; therefore, the workman can consider improving the input materials or maintaining the lining plate in advance for the local abrasion problems to avoid serious defect or accident in the crushing cavity, and by the examples of the present disclosure, crushing equipment failures caused by the expiration or localized abrasion of the liner plate are effectively reduced; 4) by referring to the liner plate thickness, the life of the liner plate can be predicted, and the fracture cavity structure degradation can be analyzed; a reliable basis is provided for quantitative analysis of the fracture cavity structure degradation according to the abrasion condition of the liner plate, so as to create conditions to accurately predict the life and fracture efficiency of the liner plate, and to reasonably prepare a maintenance plan for the crushing equipment .
    Other features and advantages of the embodiments of the present disclosure will be described in detail in the following specific implementation modes. Brief Description of the Drawings Figure 1 is a schematic diagram of a surveillance structure according to an embodiment of the present disclosure; Fig. 2 is a schematic structure diagram of a liner plate mounting hole according to an embodiment of the present disclosure; Figure 3 is a schematic diagram of a fracture cavity and sensors mounted on a liner plate according to an embodiment of the present disclosure; Figure 4 is a schematic diagram of a fracture cavity structure analysis according to an embodiment of the present disclosure; and Fig. 5 is a flow chart of an intelligent monitoring of a liner plate according to an embodiment of the present disclosure.
    40
    Descriptions of reference numerals in the drawings: 1: movable cone liner plate 11: initial contour line of the working plane of the movable cone liner plate 12: movable non-working plane of the cone liner plate 13: ultrasonic sensor mounting hole in the movable cone liner plate 14: Actual contour line of the abrasion of the working surface of the movable cone liner plate 2: Ultrasonic distance measuring sensor 21: Transmitting chip for ultrasonic distance measuring 22: Receiver chip for ultrasonic distance measuring 3: Coupling means 4: Ultrasonic distance measuring and transmission module 41: Receive circuit 42: Signal amplifier 43: signal modulator 44: counter 45: AT89C51 single chip microcomputer A 46: radio frequency wireless communication module A 47: temperature abrasion circuit 48: power module 49: transmission circuit 5: top computer 51: alarm module 52: radio frequency wireless communication module 53: AT89C51 single chip microcomputer B 54: storage module 55: display module 56: interaction module 6: fixed cone liner plate 61: initial contour line of the working plane of the fixed cone liner plate 62: non-working plane of the fixed cone liner plate 63: ultrasonic sensor mounting hole in the fixed cone liner plate 64: actual contour line of the abrasion of the working surface of the fixed cone liner plate
    Detailed Description of the Embodiments The specific implementation modes of the embodiments of the present disclosure are described in detail below with reference to the drawings.
    It will be understood that the specific implementation modes described herein are used only to illustrate and explain the embodiments of the present disclosure, and are not intended to limit the embodiments of the present disclosure.
    Embodiment 1 This embodiment provides a service node for monitoring a fracture cavity, comprising: a calculation device configured to calculate a feedback signal change property of each of the detection nodes at different positions of the fracture cavity, which has a function to determine whether the fracturing cavity is abraded according to a relationship between the feedback signal change property and preset monitoring conditions, and local cavity shape properties consisting of feedback signal properties and a spacing property between the adjacent detection nodes, selectively outputting a drive signal to each detection node, and receiving a feedback signal, having cavity shape properties of the fracture cavity, from each detection node.
    Preferably, the detection nodes for monitoring the fracture cavity are further provided, comprising: a transmitter, which receives a distance measurement signal transmitted from a serving node, generates a distance measurement pulse through the distance measurement signal and transmits the distance measurement pulse to a liner plate work surface in the fracture cavity; and a receiver, which receives a reflected pulse reflected from the liner sheet face in the fracturing cavity, generates a reflected signal from the reflected pulse, and transmits the reflected signal to the serving node.
    Preferably, further provided is an on-line monitoring system of the liner plate thickness, comprising a movable cone liner plate 1, a fixed cone liner plate 6, ultrasonic distance measuring sensors 2, a coupling means 3, an ultrasonic distance measuring and transmission module 4 and an upper computer 5. The ultrasonic distance measuring sensors 2 consist of a transmitting chip 21 and receiving chip 22. The ultrasonic distance measuring sensors 2 are mounted in blind holes 13 in one side of a non-working surface of the liner plate 1. The coupling means 3 fills the blind holes 13 of the liner plate 1 and spaces between the ultrasonic distance measuring sensors 2. The transmitting chip 21 of the ultrasonic distance measuring sensors 2 are connected to a transmitting circuit 49 of the ultrasonic distance measuring and transmission module 4. The receiving chip 22 of the ultrasonic distance measuring sensors 2 are connected to a receiving circuit 41 of the ultrasonic distance measuring and transmitting module 4 The top computer 5 is on wireless communi draadloze ication way connected with the ultrasonic distance measurement and transmission module 4.
    A working face 11 of the movable cone liner plate 1 (or a non-working face 12 of the movable cone liner plate 1) and a working face 61 of the fixed cone liner plate 6 (or a non-working face 62 of the fixed cone liner plate 6 ) form an initial fracturing cavity before abrasion, or an actual fracturing cavity after abrasion.
    Gaps between the blind holes 13 of the liner plate and the ultrasonic distance measuring sensors 2 are filled with the coupling means 3.
    The input end of the transmitting circuit 49 in the ultrasonic range measurement and transmission module 4 is connected to an AT89C51 single chip microcomputer 45, and the output end is connected to the transmitting chip 21. The input end of the receiving circuit 41 in the ultrasonic range measurement and transmission module 4 is connected to the receiving chip 22. The receiving circuit 41, a signal amplifier 42, a signal modulator 43 and a counter 44 are connected in sequence, and their output ends are all connected to the AT89C51 single chip microcomputer 45. A wireless radio frequency communication module 46, a temperature acquisition module 47 and a power module 48 are also connected to the AT89C51 single chip microcomputer 45.
    An alarm module 51, a wireless radio frequency communication module 52, a storage module 54, a display module 55 and an interaction module 56 in the upper computer 5 are all connected to the AT89C51 single chip microcomputer 53.
    Preferably, a method of ultrasonically measuring a liner plate thickness is further provided, comprising the following steps: In a first step, the ultrasonic distance measuring sensors mounted on one side of the non-working face of each of the movable cone liner plate 1 and the solid cone liner plate 6 controlled by the AT89C51 single chip microcomputer 45 to transmit ultrasonic waves, and start counting f, and the ultrasonic waves are transmitted to the surfaces of the liner plates through the coupling means 3, and are transmitted in the liner plates with a certain wave speed c; the ultrasonic waves are reflected as they are transmitted to the working surfaces of the liner plates, and are then received by an ultrasonic receiver; at the same time, the AT89C51 single chip microcomputer 45 realizes an external interruption, and the counter stops counting.
    in a second step, an ultrasonic transmission time slot Af; calculated from each measuring point on the movable cone liner plate 1 and the fixed cone liner plate 6; in a third step, the thickness /,, = > of each measuring point on the movable cone liner plate 1 and the thickness h,, = > of each measuring point on the fixed cone liner plate 6 are calculated according to the transmission time slots Af; in a fourth step, the thickness of each measuring point on the movable cone liner plate 1 and the fixed cone liner plate 6 is sent to the upper computer 5 in wireless communication mode.
    An intelligent liner plate life analysis method includes the following steps:
    in a first step, an actual liner plate thickness and an initial liner plate thickness are compared to determine an abrasion degree of each measurement point on the movable cone liner plate 1 and the fixed cone liner plate 6, respectively; in a second step, the remaining life of the movable cone liner plate 1 and the fixed cone liner plate 6, respectively, are determined according to the abrasion degree of each measuring point; in a third step, the remaining life of each measuring point of the movable cone liner plate 1 and the fixed cone liner plate 6 is transmitted in wireless communication to the upper computer 5. A method of analyzing a fracture cavity structure comprises the following steps: in a first step, an initial fracturing cavity structure before abrasion is drawn according to initial structures of the movable cone liner plate 1 and the fixed cone liner plate 6; in a second step, a fracture cavity shape structure after abrasion is regularly drawn according to the thickness of each measuring point on the movable cone liner plate 1 and the fixed cone liner plate 6; and in a third step, the current fracture cavity shape structure after abrasion and the fracture cavity structure before abrasion are compared to analyze a change of the fracture cavity shape structure after abrasion; in a fourth step, a basis is provided to reasonably make a maintenance plan for a crushing apparatus or a ball mill based on the integration of the abrasion degrees of the movable cone liner plate 1 and the fixed cone liner plate 6 and the change of the geometric structure of the fracture cavity.
    Embodiment 2 Based on Embodiment 1, as shown in Fig. 1, the embodiment of the present disclosure discloses an intelligent liner plate comprising a movable cone liner plate 1, a fixed cone liner plate 6, ultrasonic distance measuring sensors 2, a coupling means 3, an ultrasonic distance measuring and transmission module 4 and a top computer 5. The ultrasonic distance measuring sensors 2 consist of transmitting chip 21 and receiving chip 22. The ultrasonic distance measuring sensors 2 are mounted in blind holes 13 in one side of a non-working face of the liner plate 1. The coupling means 3 fills the blind holes 13 of the liner plate 1 and spaces between the ultrasonic distance measuring sensors 2. The transmitting chip 21 of the ultrasonic distance measuring sensors 2 are connected to a transmitting circuit 49 of the ultrasonic distance measuring and transmission module 4. The receiving chip 22 of the ultrasonic distance measuring sensors 2 are connected to a receiving circuit 41 of the ultrasonic distance sensor et and transmission module 4. The top computer 5 is wirelessly connected to the ultrasonic distance measurement and transmission module 4.
    The input end of the transmitting circuit 49 in the ultrasonic range measuring and 40 transmission module 4 is connected to an AT89C51 single chip microcomputer 45, and the output end is connected to the transmitting chip 21. The input end of the receiving circuit 41 in the ultrasonic range measuring and transmitting module 4 is connected to the receiving chip 22. The receiving circuit 41, a signal amplifier 42, a signal modulator 43 and a counter 44 are connected in sequence, and their output ends are all connected to the AT89C51 single chip microcomputer 45. A wireless radio frequency communication module 46 , a temperature acquisition module 47 and a power module 48 are also connected to the AT89C51 single chip microcomputer 45. The power module 48 supplies power to the AT89C51 single chip microcomputer 45.
    An alarm module 51, a wireless radio frequency communication module 52, a storage module 54, a display module 55 and an interaction module 56 in the upper computer 5 are all connected to an AT89C51 single chip microcomputer 53.
    Preferably, the embodiment of the present disclosure further provides an ultrasonic online monitoring method for a liner plate thickness, comprising the following steps: in a first step, measurement points are provided: mounting holes 13 are machined at specific positions of the movable cone liner plate 1, a plurality of mounting holes 63 are machined at specific positions of the fixed cone liner plate 6, and the ultrasonic distance measuring sensors 2 are mounted in the holes, as shown in Fig. 2 and Fig. 3, respectively; in a second step parameters are set: an original thickness (ho)i(i = 1,2, n) and a threshold Ah; (i = 1,2,:n) of a minimum residual thickness of each measuring point on the movable cone liner plate 1 and the fixed cone liner plate 6, and a transmission speed co of ultrasonic waves in high manganese cast steel ZGMn13 at the ambient temperature of 20 °C are set by the interaction module 56 of the upper computer 5; in a third step, an ultrasonic thickness measurement and life analysis method for each liner plate is as follows: step 1, ultrasonic signal transmission and counting: when a distance measurement instruction is input, the AT89C51 single chip microcomputer 53 in the upper computer 5 sends a signal to the radio frequency communication module 46 in the ultrasonic range measurement and transmission module 4 by means of the wireless radio frequency communication module 52, and then drives the ultrasonic transmitting circuit 49 by means of the AT89C51 single chip microcomputer 45 to transmit a plurality of square pulse high voltage signals. transmit to the transmit chip 21 of the ultrasonic distance measuring sensors, and convert the high voltage pulses into ultrasonic pulse wave signals of the same frequency, meanwhile, the AT89C51 single chip microcomputer 45 controls the counter 44 to start counting; step 2, receiving and counting the ultrasonic signals: the ultrasonic pulse signals transmitted from the transmitting chip 21 enter the liner plates through the coupling means 3 and are transmitted into the liner plates at a certain wave velocity c; the ultrasonic waves are reflected when they reach a working surface 11 of the liner plate 1, and then the reflected ultrasonic signals are received by the receiving chip 22 of the ultrasonic distance measuring sensors; the received ultrasonic signals are sent to the receiving circuit 41, and electrical pulse signals are amplified, filtered and shaped by the signal amplification circuit 42 and the signal modulator 43 and converted into countable square wave signals having thickness value pulse widths; and the AT89C51 single chip microcomputer 45 realizes an external interrupt, and the counter 44 stops counting; step 3, determining transmission time slots: an ultrasonic transmission time slot Af;
    of each measuring point on the movable cone liner plate 1 and the fixed cone liner plate 6 is calculated according to the count of the counter;
    step 4, correcting transmission rates: when the transmission time of the ultrasonic pulse signals in the liner plates is determined, the AT89C51 single chip microcomputer 45 in the ultrasonic distance measurement and transmission module 4 controls the temperature acquisition circuit 47 for detecting temperatures of positions at which the ultrasonic distance measuring sensors 2 are fitted, and the transmission rate of the ultrasonic waves at each measuring point is corrected according to a relationship between the temperatures and the transmission rates based on the formula 1, i.e.:
    c=c ATi p (=1,2,"n) (1) where co is the transmission speed (m/s) of the ultrasonic waves at the ambient temperature of 20°C, ATi = (T-20)°C, and ATi is a temperature difference, and u is a sound speed coefficient of variation, i.e. the speed of sound increases by 0.17% when the ambient temperature rises 1°C;
    step 5, determining and displaying the thicknesses of the liner plates: the thickness h; of each measuring point is calculated according to the following formula (2) based on the time slot At; and the transmission rate c;, the measured thickness h; is sent to the AT89C51 single chip microcomputer 53 in the upper computer 5 by means of the wireless radio frequency module 46 in the ultrasonic distance measuring module 4, and the thickness value of each measuring point is displayed by the display module 55, that is:
    h = em, (=1,2,n) (2) 2 In a fourth step, the degree of abrasion of each measuring point of the liner plates is counted: the thickness hi of each measuring point on the movable cone liner plate 1 and the fixed cone liner plate 6 and the original thickness (ho)i (i=1,2,-",n) are compared; when the (ho); value is the threshold Ah: (i=1,2,:::‚n) of the minimum residual thickness of the measurement point has been reached, this measurement point has reached a liner plate boundary, and meanwhile, the memory 54 records and stores this measurement point j (=1,2,,m, and miss less than or equal to n);
    in a fifth step, the lifetimes of the lining plates are analysed: when the number of m measuring points reaching the lining plate abrasion limit is greater than or equal to (1/2)n, and these measuring points are distributed among the working surfaces of the movable cone- liner plate 1 and the fixed cone liner plate 6, then, at this time, the alarm module 51 in the upper computer 5 sounds an alarm about the life of the movable cone liner plate 1 or the fixed cone liner plate 6.
    The step of the analysis of the change of the fracture cavity structure in combination with Figure 4 includes: a first step: calculating the surfaces of abrasion areas of the liner plates: (1) calculating the original surfaces of liner plate areas: the surfaces &, tin Satan and Sara) of quadrilaterals formed by (A, A Aj Az), (Ag, A, 45, Az) AND (Az, A, A, A,) are determined respectively according to the gaps A, A, À . A, and A, of the ultrasonic distance measuring sensors 2 on one side of the working plane of the movable cone liner plate 1, and the original thicknesses A A, AA, and A, As of the positions at which the sensors 2 are mounted, of the liner plates; the surfaces Ss (im ‚Sg caa and F5 cas Of quadrilaterals formed by (B, B.. Eu B), (Bu Ba B. B,)and(5,, Bay Bi, 5,) are determined respectively according to the gaps B: 5.4, 2-8. and EE of the ultrasonic distance measuring sensors 2 on one side of the working plane of the fixed cone liner plate 6 and the original thicknesses 8.8, BB: and BB: of the positions at which the sensors 2, of the lining plates; (2) calculation of the surfaces of the abrasion areas of the lining plates: the surfaces 33:12 Sarz-3; and 54:24; of quadrilaterals formed by (djs A dis AL), ( An. A, A, Az) and (Az, d., AL, Ai) are determined respectively according to the abrasion degrees À, 4{, 3; and A. 4; of the ultrasonic distance measuring sensors 2 on one side of the working plane of the movable cone liner plate 1 and the interstices 4, As, 4-4, and À, 4; of the measuring points; the surfaces Sara Sgr:_3; and 522; OF quadrilaterals formed by (B,, B. Bi B> ), (B, Bu BB;)and(8, , B., FE. BS) are determined according to the abrasion degrees 8.8, respectively; and 5.5; from the ultrasonic distance measuring sensors 2 on one side of the working plane of the fixed cone liner plate 6 and by combining the gaps B; 5,5-2; and BEB, from the measuring points, a second step, calculating the abrasion degree of the fracture cavity: the abrasion degrees 34, = Sa 2/54 (139 > Mar= Sara Sa (23) ON Mas = Sara Sa (30 of the lower area , the middle region and the upper region of the movable cone liner plate 1 are calculated first, respectively, and then the abrasion degrees are +751 — Ssi 2ySs (5D) > ga — Fare-aVFa (23) and gs — Epra-VS5 ( 34) of the lower region, the middle region and the upper region of the fixed cone liner plate 6 calculated respectively; a third step, fracture cavity structure analysis and alarm: the abrasion degrees naz, Naz and Nas of the movable cone liner plate 1 and the abrasion degrees ns, Nez and Nez of the solid cone liner plate 6 are respectively compared with their abrasion degree thresholds, and if the abrasion degree of each area is greater than the corresponding threshold, the fracture cavity has a structure variation, and the upper computer sounds an alarm .
    A monitoring method based on a serving node and detection nodes can be designed as shown in Fig. 5, comprising: Step |, a wave speed and operating threshold parameters of the fracture cavity are set; Step II, when the detection nodes receive distance measurement instructions, the detection nodes transmit ultrasonic signals; Step III, the detection nodes receive reflected ultrasonic signals in response to the just transmitted ultrasonic signals; Step IV, the serving node determines a feedback signal having cavity shape properties of the fracture cavity according to a transmission time slot consisting of the transmitted ultrasonic signals and the reflected ultrasonic signals; Step V, the serving node calculates a liner plate thickness of the current detection node corresponding to the current feedback signal according to the feedback signal; Step VI, Steps II - V are circulated until liner plate thicknesses of the positions on which all selected detection nodes are mounted are obtained; Step VII, it is determined whether the obtained liner board thicknesses are greater than a liner board thickness threshold; if yes, it will sound an alarm that this liner plate is abraded; if the obtained liner board thicknesses are not greater than the liner board thickness threshold, proceed to the next step; Step VIII, each surface having local area properties of the liner plate is calculated according to the obtained liner plate thicknesses and an actual distance between the adjacent nodes, and the abrasion degree of the fracturing cavity is calculated according to the surfaces; and Step IX, it is determined whether the abrasion degree exceeds a preset abrasion threshold; if yes, it will sound an alarm that this liner plate is abraded; if the abrasion rate does not exceed the preset abrasion threshold, all current data is recorded, and the life of the liner plate is selectively calculated according to the current abrasion rate to obtain a predicted maintenance date.
    The optional modes of implementation of the embodiments of the present disclosure are described in detail above with reference to the accompanying drawings. However, the embodiments of the present disclosure are not limited to the specific details in the above implementation modes. Various simple variations can be made on the technical solutions of the embodiments of the present disclosure within the technical concept ranges of the embodiments of the present disclosure, and these simple variations are all within the scope of the embodiments of the present disclosure.
    It should further be noted that all the specific technical features described in the foregoing specific implementation modes can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the embodiments of the present disclosure do not separately describe various possible combinations.
    Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments can be completed by a program instructing related hardware. This program is stored in a storage medium and includes a number of instructions configured to allow a single chip microcomputer, a chip or a processor to perform all or part of the steps of the methods described in the various embodiments of the present application. The above storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk and other media that can store program codes.
    Furthermore, various different implementation modes of the embodiments of the present disclosure may also be arbitrarily combined, and these combinations are also to be regarded as the contents disclosed in the embodiments of the present disclosure, so long as they do not infringe the idea of the embodiments of the present disclosure.
    Drawings
    Figure 1
    Figure 5
    Set a wave velocity and threshold parameters | Set a wave speed and threshold parameters ee
    Calculate the thickness of each measurement | Calculate the thickness of each measuring point pm TT EE
    The liner plate thickness is greater than a The liner plate thickness is greater than each liner plate according to the thickness of | abrasion area of each liner plate according to Calculate the abrasion rate of the crushing Calculate the abrasion rate of the crushing cavity ee The abrasion rate is greater than the set The abrasion rate is greater than the set
    权利要求:
    Claims (10)
    [1]
    A method of monitoring, by a serving node, a fracture cavity, comprising the steps of: S1) acquiring a feedback signal, having cavity shape properties of a fracture cavity, from each of the detection nodes at different positions of the fracture cavity, and performing the next step when the feedback signal satisfies a first preset monitoring condition; S2) selecting a current detection node, and determining local cavity shape properties of the fracture cavity according to inter-node properties of the current detection node and an adjacent detection node, the feedback signal from the current detection node and the feedback signal from the adjacent detection node; and S3) jumping to step S2) when the local cavity shape properties meet a second preset monitoring condition, thereby forming a cyclic monitoring process.
    [2]
    The monitoring method according to claim 1, wherein the step S1) comprises: S101) transmitting a first sound wave signal to each of the detection nodes at different positions of the fracture cavity, and receiving a second sound wave signal reflected from each detecting node; S102) for each detecting node, acquiring a feedback signal having a distance property from the cavity wall of the fracturing cavity to the current corresponding detecting node according to the first sound wave signal and the second sound wave signal corresponding to the first sound wave signal; and S103) preset a minimum distance and a ratio threshold, then setting a ratio of the number of feedback signals less than or equal to the minimum distance to a total number of feedback signals within the ratio threshold as the first preset monitoring condition, and performing step S2) when the feedback signal satisfies the first preset monitoring condition.
    [3]
    The monitoring method according to claim 1 or 2, wherein the step S2) comprises: S201) selecting a current detection node; S202) measuring first inter-node distances from the current detection node and an adjacent detection node on a liner plate face within the fracturing cavity and second inter-node distances from the current detection node and an adjacent detection node on a liner plate plane outside the fracturing cavity as inter -node properties;
    S203) acquiring a first node distance from the current detection node to the liner plate working plane within the fracturing cavity according to a feedback signal from the current detecting node, and acquiring a second node distance from the adjacent detecting node to the liner plate working plane within the fracturing cavity according to a feedback signal from the adjacent detection node; and S204) forming at least one polygon by the first inter-node distances, the second inter-node distances, the first node distance and the second node distance, and taking a current area of the at least one polygon as a current local cavity shape property of the fracture cavity.
    [4]
    The monitoring method of claim 3, wherein the step S3) comprises: S301) presetting an abrasion threshold, inquiring first initial inter-node distances, second initial inter-node distances, a first initial node distance and a second initial inter-node distance node spacing to form at least one initial polygon, and taking an initial area of the at least one initial polygon as an initial local cavity shape property of the fracturing cavity; S302) acquiring an area ratio of the current area of the at least one polygon to the initial area of the at least one initial polygon, and taking the area ratio as a degree of abrasion; and S303) setting the abrasion degree that is within the abrasion threshold as a second preset monitoring condition, and jumping to step S2) when the abrasion degree satisfies the second preset monitoring condition, thereby forming the cyclic monitoring process.
    [5]
    A method of monitoring, by a detecting node, a fracture cavity, comprising the steps of: S1) transmitting a distance measurement signal to a liner plate working face of a fracture cavity, and then acquiring a reflected signal corresponding to the distance measurement signal; and S2) acquiring a time delay feature signal having cavity shape feature information according to the distance measurement signal and the reflected signal, and transmitting the time delay feature signal to a serving node to enable the serving node to generate a feedback signal according to the time delay feature signal acquire.
    [6]
    The monitoring method according to claim 5, wherein the step S1) comprises: S101) receiving a driving signal selectively transmitted by a serving node; and
    S102) transmitting a sound wave distance measurement signal to a fracturing cavity liner sheet work surface according to the driving signal, and then acquiring a reflected sound wave signal corresponding to the sound wave distance measurement signal; wherein the step S102) further comprises: transmitting an inter-node sound wave distance measurement signal to an adjacent detecting node according to the driving signal to enable the adjacent detecting node to acquire the inter-node sound wave distance measuring signal.
    [7]
    A fracture cavity monitoring service node, comprising: a calculation device configured to calculate a feedback signal change property of each of the detection nodes at different positions of a fracture cavity, which has a function to judge whether the fracture cavity is abraded according to a relationship between the feedback signal change property and preset monitoring conditions and local cavity forming properties consisting of feedback signal properties and a distance property between adjacent detection nodes, selectively outputting a drive signal to each detection node, and receiving a feedback signal, which has fracture cavity properties of each sensing node.
    [8]
    A detection node for monitoring a fracture cavity, comprising: a transmitter configured to receive a distance measurement signal transmitted from a service node, generate a distance measurement pulse by the distance measurement signal, and transmit the distance measurement pulse to a liner sheet work surface within the fracture cavity; and a receiver configured to receive a reflected pulse reflected from the liner plate face within the fracturing cavity, generate a reflected signal from the reflected pulse, and transmit the reflected signal to the serving node.
    [9]
    A liner plate lifetime prediction method based on a service node, comprising the steps of: S1) selecting a detection node group in a liner plate, selecting a current detection node, and calculating an abrasion degree of a liner plate area on which the detection node group is present by acquiring a feedback signal from each detection node in the detection node group and inter-node properties of the current detection node and a detection node adjacent to the current detection node; and S2) determining a remaining life of the liner plate according to the degree of abrasion.
    [10]
    A method of generating a current cavity shape of a fracture cavity based on a service node, comprising the steps of: S1) selecting a detection node group in a fracture cavity, selecting a current detection node, calculating a change vector of a local region of the fracture cavity in which the detection node group is present, by acquiring a feedback signal from each detection node in the detection node group and inter-node properties of the current detection node and a detection node adjacent to the current detection node, and updating coordinates of a local area of the fracture cavity on which the detection node group resides; and S2) generating a current cavity shape of the fracturing cavity according to the coordinates of the local area.
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    同族专利:
    公开号 | 公开日
    CN110142084A|2019-08-20|
    CN110142084B|2022-02-22|
    BE1027148A1|2020-10-23|
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    法律状态:
    2021-07-19| FG| Patent granted|Effective date: 20210622 |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201910281688.8A|CN110142084B|2019-04-09|2019-04-09|Crushing cavity wear monitoring method|
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