• 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:
    System for the measurement and monitoring of movements in structures, comprising at least one set of distance measurement between a fixed reference and a mobile reference, each measurement set includes a target element and a laser displacement transducer pointed towards said element of target, the laser displacement transducer is adapted to measure variations in distance from the corresponding target element generated by vertical movements in the structure in which it is desired to measure said movements, where, the target element and the laser displacement transducer are arranged on the structure, and the target element is the fixed reference and the laser displacement transducer is the mobile reference. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2734141A1
    申请号:ES201830539
    申请日:2018-06-04
    公开日:2019-12-04
    发明作者:Cabrera Miguel Angel Vicente；Cabrera Dorys Carmen González；Algarra Jesús Mínguez
    申请人:Universidad de Burgos；
    IPC主号:
    专利说明:

    [0001] SYSTEM FOR THE MEASUREMENT AND MONITORING OF MOVEMENTS IN STRUCTURES
    [0002]
    [0003] TECHNICAL FIELD OF THE INVENTION
    [0004]
    [0005] The present invention encompasses in the field of systems, devices or equipment for measuring or monitoring movements generated in structures, mainly civil works, such as bridges, structural elements in buildings or other similar engineering work.
    [0006]
    [0007] BACKGROUND OF THE INVENTION
    [0008]
    [0009] In recent years, there has been an unprecedented development in the monitoring of civil works structures, especially bridges, although not only. Among all the parameters that can be controlled in these structures, especially those of civil works and building, the movements that experience these structures stand out. The movements generated in the structures bring together all the mechanical properties of these structures and suffer modifications when they are degraded. Consequently, the monitoring of movements in the structures, at their representative points, is a good tool for the preventive control of their safety and reliability.
    [0010]
    [0011] However, measuring movements in structures is not an easy task. The ideal sensor means for carrying out said measurement must firstly be precise (capable of measuring with precession greater than 0.1 mm in displacement), and secondly, cheap. Additionally, the sensing means must be able to work in any environmental and light condition, they must be immune to electromagnetic fields and they must be stable, that is, they must not show drift to the extent over time.
    [0012]
    [0013] In addition, it is necessary that the analysis of the data be carried out quickly, almost in real time, without the need for particularly powerful and expensive computer equipment.
    [0014] At present, various technologies are known for the measurement of movements suffered by civil works structures, for example, bridges.
    [0015]
    [0016] Some of these known technologies employ a displacement transducer, whether inductive or resistive. These types of displacement transducers have numerous advantages, for example, they are precise, cheap, robust, stable, among others. However, they have the disadvantage that they require a near fixed point, which poses technical difficulties, insurmountable in many occasions in practice.
    [0017]
    [0018] The use of displacement transducers with laser technology is also known, for example, triangulation, distance measurement, interferometry, etc. These laser displacement transducers measure the variation of the distance between two points, where, one of the points acts as a fixed reference, for the purpose of the measurement to be performed, and then it is possible to know the movement of the other point.
    [0019]
    [0020] Commonly, laser displacement transducers are usually arranged at a fixed point outside the structure, while the reference or target is arranged at a mobile point of said structure that is intended to be monitored. For example, if you want to measure the descent experienced by the structure of a bridge, the "natural" fixed point that is usually taken is the ground, then measure the variation of the vertical distance between the bridge and the ground. alternatives for measuring: put the laser displacement transducer on the ground and measure the distance between said transducer and the bridge, or put the laser displacement transducer on the bridge and measure the distance between it and the ground. cases, it is possible to measure a variation of distance generated by movements of the bridge structure.
    [0021]
    [0022] On the other hand, the distance at which the laser displacement transducer and the target are arranged depends on the specific conditions of the structure to be measured, and on the other hand, the precision of the movement measurement will be conditioned by said distance between the transducer Laser displacement and target. Also influencing the environmental conditions of the place where the structure is located in the measurement accuracy. What is a problem in the case of bridges, which are usually quite a few meters from the ground, in addition to being exposed to the environmental conditions of the place where it is located.
    [0023]
    [0024] Therefore, in this known configuration, said laser displacement transducers are not able to adequately combine precision, economy and robustness. Those that are precise and robust are not economical, and those that are robust and economical, then, are not accurate.
    [0025]
    [0026] The measurement of displacements or movements in structures using GPS technology is also known. This technology is economical for the user, but its accuracy is very low, unacceptable for the monitoring of constrictive structures.
    [0027]
    [0028] On the other hand, the measurements of displacements in structures based on the use of video cameras and artificial vision technologies are known, being up to date an expensive solution, both for the cost of the technical elements used and for the computational cost of the post -processed data, so it is not yet a mature and profitable solution for its massive implementation in the field.
    [0029]
    [0030] For this reason, it is necessary to design a system for the monitoring of movements in structures that, in a simple and economic way, manage to overcome the previous disadvantages.
    [0031]
    [0032] DESCRIPTION OF THE INVENTION
    [0033]
    [0034] The present invention is established and characterized in the independent claims, while the dependent claims describe other features thereof.
    [0035]
    [0036] The object of the invention is a system capable of continuously monitoring movements in structures, such as bridges. The technical problem to solve is how to achieve the measurement, precisely and economically, of the movements that a structure experiences.
    [0037] The system comprises at least one set of distance measurement between a fixed reference and a mobile reference. Each of said measurement assemblies includes at least one target element and a laser displacement transducer pointed towards said target element. The laser displacement transducer is adapted to measure distance variations with respect to the corresponding target element, where, said distance variations are generated by vertical movements in the structure to be monitored.
    [0038]
    [0039] Likewise, the target element and the laser displacement transducer are arranged on the structure, where, the target element is the fixed reference and the laser displacement transducer is the mobile reference.
    [0040]
    [0041] In this way, while the target element is maintained without varying its position, integral to a point of the structure that does not experience movements, or, in a negligible magnitude for measurement, the laser displacement transducer is fixed to a point of the structure that experiences the movements to be measured, so that the laser displacement transducer moves next to the mobile point of the structure, accurately measuring the variation in distance it experiences with respect to the target element.
    [0042]
    [0043] Since both the target element and the laser displacement transducer are fixed to the structure, it is achieved that the separation between both elements of the distance measurement assembly is minimal, whereby the pressure of the movement measurement is significantly increased of the structure.
    [0044]
    [0045] Likewise, since both elements of the distance measuring set to the structure are fixed, these can be arranged protected from the weather and away from areas of easy public access, so that the results of the measurements made by the system are not visible affected by environmental conditions or agents, while avoiding problems motivated by vandalism.
    [0046]
    [0047] With all this, a precise solution is achieved, with a relatively low cost since distance measuring elements used in other industrial / commercial sectors are used and, therefore, can be easily acquired in the market.
    [0048] In addition, these distance measuring elements used in the present invention can operate under any ambient and light conditions (day, night, foggy, raining, etc.). The laser displacement transducer is insensitive to electromagnetic fields, so it can be used in structures subject to this type of fields, in addition to being stable, that is, it does not lose the initial reference, which constitutes an essential condition in monitoring In the long term, movements in the structures, where, said monitoring is carried out precisely, being, both the laser displacement transducer and the target element, fixed on the structure to be monitored, minimizing the separation between both elements of the distance measurement set.
    [0049]
    [0050] BRIEF DESCRIPTION OF THE FIGURES
    [0051]
    [0052] The present specification is complemented with a set of figures, illustrative of the preferred example, and never limiting the invention.
    [0053]
    [0054] Figure 1 represents a schematic view of a first embodiment of the system for measuring and monitoring movements with a distance measurement set arranged on a structure.
    [0055]
    [0056] Figure 2 represents a schematic view of a second embodiment of the system for the measurement and monitoring of movements arranged on the structure shown in Figure 1, which includes two distance measurement sets and an auxiliary distance measurement set.
    [0057]
    [0058] Figure 3 represents a block diagram of the system for the measurement and monitoring of movements.
    [0059]
    [0060] DETAILED EXHIBITION OF THE INVENTION
    [0061]
    [0062] The present invention is a system for the measurement and monitoring of movements in structures, such as, bridges or other structures of civil or non-civil use comprising a longitudinal structural element arranged horizontally on at least two vertical pillars or supports.
    [0063] As shown in Figures 1 and 2, the system for measuring and monitoring movements comprises at least one measuring set (1) of distance between a fixed reference and a mobile reference. Each measurement set (1) includes at least one target element (1.1) and a laser displacement transducer (1.2) pointed towards said target element (1.1), where, each laser displacement transducer (1.2) is adapted to measure distance variations from the corresponding target element (1.1). These distance variations are generated by vertical movements in the structure (2) to be monitored.
    [0064]
    [0065] In the embodiment shown in Figure 1, the system for measuring and monitoring movements comprises a distance measurement assembly (1) which, in turn, comprises a plurality of target elements (1.1) and the same number of transducers of laser displacement (1.2) pointed towards each of said target elements (1.1). However, as shown in Figure 2, the system for measuring and monitoring movements could comprise more than one distance measurement set (1) as shown in Figure 1.
    [0066]
    [0067] In either case, the target element (1.1) and the laser displacement transducer (1.2) are arranged on the structure (2), where, the target element (1.1) is the fixed reference and the laser displacement transducer (1.2) is the mobile reference of the measurement set (1).
    [0068]
    [0069] For this, it is necessary to recognize in the structure (2) some fixed points (p1, p2), that is, certain points of the structure (2) whose movement can be considered null for the purposes of the measurement to be carried out.
    [0070]
    [0071] For example, in the most usual case of a bridge board, whose longitudinal axis (e) is substantially horizontal and is mostly subjected to substantially vertical loads and movements, that is, substantially perpendicular to said longitudinal axis (e), the latter, A fixed reference can be considered to measure the aforementioned vertical movements experienced by the structure (2).
    [0072]
    [0073] Therefore, it is preferred that the fixed points (p1, p2) be circumscribed to two ends of the longitudinal axis (e) of the structure (2) extended horizontally between two of its supports (2.1), that is, the fixed points ( p1, p2) are part of sections of the structure (2) that are arranged on top of two of the supports (2.1) thereof.
    [0074]
    [0075] In other types of structures (2), it will be necessary to identify in them those points that can be considered for the fixed reference.
    [0076]
    [0077] Additionally, it is preferred that the target element (1.1) be fixed to a support cable (3), which is anchored to two of the fixed points (p1, p2) of the structure (2). The support cable (3) is postted between the fixed points (p1, p2) by means of the usual post-tensioning techniques for said support cable (3), depending on the characteristics of the material of which it is formed. Preferably, the target elements (1.1) will be of reduced dimensions and will be jointly connected to the support cable (3), so that there are no relative movements between said target elements (1.1) and the support cable (3), materializing thus, that said target elements (1.1) constitute the fixed reference of the measurement set (1).
    [0078]
    [0079] On the other hand, there will be as many laser displacement transducers (1.2) as target elements (1.1), the latter, allow to realize the point of impact of the laser to carry out the measurement of the variation of the distance that separates said elements (1.1, 1.2).
    [0080]
    [0081] Preferably, each laser displacement transducer (1.2) is fixed to a movable point (p3) of the structure (2), for example, they could be fixed on points of the bridge board that do not correspond to sections above the supports (2.1, 2.2) of the structure (2), in such a way that with said laser displacement transducer (1.2) the distance variation of the moving point (p3) with respect to the corresponding target element (1.1) can be measured. With this, it is realized that the laser displacement transducers (1.2) conform the mobile reference of the measurement set (1).
    [0082]
    [0083] Thus, on the support cable (3) will be fixed as many target elements (1.1) as laser displacement transducers (1.2) are fixed at moving points (p3) of the structure (2), or what is the same, as many as Measuring points are intended to be included in said structure (2).
    [0084] In addition, the imaginary line (i) that joins each laser displacement transducer (1.2) with its respective target element (1.1) must be parallel to the direction in which it is intended to measure the movement of the mobile point (p3) of the structure (2) to be monitored, therefore all the imaginary lines (i) connecting the laser transducers (1.2) with their target elements (1.1) that make up the substantially parallel measurement set (1).
    [0085]
    [0086] Thus, when the moving points (p3) of the structure (2) undergo a movement, their laser displacement transducers (1.2) will move in solidarity with said points (p3), while the target elements (1.1) remain immobile in their position, thus measuring, each transducer (1.2), the variation of distance existing from its position to its respective target element (1.1). Then, the movement of each mobile point (p3) of the structure (2) to be monitored, in a certain period of time "At", is defined as the difference between the distance between the laser displacement transducer (1.2) and the corresponding target element (1.1) censored before the start of the "At" time period, and the distance between said elements (1.1, 1.2) censored at the end of said "At" time period.
    [0087]
    [0088] Therefore, in a structure (2), as many support cables (3) can be arranged as desired, provided there is a sufficient number of fixed points (p1, p2) on which said support cables (3) can be anchored, thus as, place on each of said support cables (3) as many target elements (1.1) as moving points (p3) of the structure (2) to be monitored.
    [0089]
    [0090] Additionally, the system for the measurement and monitoring of movements can comprise an auxiliary measurement set (4), in the event that the occurrence of movements of the fixed points (p1, p2), to which the support cable is fixed, is expected (3), in the direction of the longitudinal axis (e) of the structure (2).
    [0091]
    [0092] For example, in the embodiment shown in Figure 2, the system for measuring and monitoring movements comprises two measuring sets (1A, 1B) and an auxiliary measuring set (4) of distance between the fixed points (p1, p2 ) of ends (e1, e2) of said measurement sets (1A, 1B).
    [0093] Preferably, the auxiliary measuring assembly (4) also includes a target element (4.1) and a laser displacement transducer (4.2) pointed towards said target element (4.1), where, the laser displacement transducer (4.2) It is adapted to measure variations in distance from the corresponding target element (4.1) generated by horizontal movements in the structure (2), that is, in the direction of its longitudinal axis (e).
    [0094]
    [0095] Likewise, it is preferred that the target element (4.1) and the laser displacement transducer (4.2) of the auxiliary measurement assembly (4) be equal to the target elements (1.1) and the laser displacement transducers (1.2) of the measurement set (1).
    [0096]
    [0097] However, in the case of the auxiliary measurement assembly (4), it is preferred that the fixed reference be its laser displacement transducer (4.2), and the mobile reference be its target element (4.1).
    [0098]
    [0099] For this, it is preferred that the target element (4.1) of the auxiliary measuring assembly (4) be fixed to a second support cable (5), in this case, post-tensioned between two fixed points (p1, p2) of the structure ( 2), and the laser displacement transducer (4.2) of the auxiliary measuring assembly (4) is fixed to an intermediate fixed point (p4) above an intermediate support (2.2) that is arranged between the supports (2.1) of the structure (2).
    [0100]
    [0101] Likewise, it is preferred that the imaginary line (i) that joins the laser displacement transducer (4.2) with its respective target element (4.1) of the auxiliary measuring assembly (4) be substantially parallel to the imaginary lines (i) that join the laser transducers (1.2) with their target elements (1.1) that make up the measurement set (1). Since the laser displacement transducer (4.2) of the auxiliary measuring assembly (4) is arranged on the intermediate fixed point (p4), the variations in the distance between the laser displacement transducer (4.2) and the target element (4.1 ) will be exclusively due to variations in distance, shortening or elongation, between the fixed points (p1, p2) to which the second support cable (5) is anchored.
    [0102] Then, similar to the case of the moving points (p3), the movements of the fixed points (p1, p2) of the structure (2) between which the second support cable (5) that is intended to be monitored is post-tensioned, in a certain period of time "At", it is defined as the difference between the distance between the laser displacement transducer (4.2) and the target element (4.1) censored before the start of the period "At", and the distance between said elements (4.1, 4.2) censored at the end of said period of time "At".
    [0103]
    [0104] Assuming that the shortening or lengthening between the fixed points (p1, p2) of anchoring of each of the support cables (3, 5) used are proportional to the distance that separates them in all cases, which is reasonable in civil works structures, there is a biunivocal relationship between the variation of distance measured by the auxiliary measurement set (4) and the impact that said variation of distance, shortening or elongation, between the fixed points (p1, p2) of the Support cables (3) of the measurement assemblies (1) have the measurement of the variation in distance between the laser displacement transducers (1.2) and their respective target elements (1.1). Consequently, the auxiliary measuring assembly (4) serves to discount the effect of the variation in distance, shortening or elongation, between the two fixed points (p1, p2) to which each support cable (3) of the measurement sets (1), according to the longitudinal axis (e) that joins them, to the extent of the distance variation between each laser displacement transducer (1.2) and its target element (1.1).
    [0105]
    [0106] As shown in Figure 3, it is preferred that each laser displacement transducer (1.2, 4.2) is connected to data recording means (6), the latter, adapted to collect and store the variations of distances measured by each displacement transducer laser (1.2, 4.2).
    [0107]
    [0108] Likewise, it is preferred that the data recording means (6) be connected to automated data processing means (7), for example, a personal computer, through which the post-processing of data can be performed automatically. the measurements obtained.
    [0109]
    [0110] In this way, each laser displacement transducer (1.2, 4.2) provides to the data recording means (6), in real time, the existing distance measurement between them and the corresponding target element (1.1,4.1), to then carry out the post-processing of said measurements in the automatic data processing means (7).
    [0111]
    [0112] In the automatic data processing means (7), the magnitude of the movement experienced by each mobile point (p3) of the structure (2) that is monitored in a certain period of time "At" is determined, which, as As mentioned above, it consists in finding the difference between the distance between the corresponding laser displacement transducer (1.2) and its target element (1.1) censored before the start of the “At” period of time, and the distance between said elements (1.1, 1.2) censored at the end of the “At” time period.
    [0113]
    [0114] If an auxiliary measurement set (4) is used, it is expected that there may be relevant movements of the fixed points (p1, p2), in addition, the automatic data processing means (7) take into account the effect of the distance variation, shortening or elongation, between the fixed points (p1, p2) in the distance measurement between each laser displacement transducer (1.2) and its target element (1.1) that has been provided for the period of time “ At. " As previously mentioned, the variation in distance experienced by the fixed points (p1, p2) is determined by finding the difference between the distance between the laser displacement transducer (4.2) and the target element (4.1) of the auxiliary measurement set (4) censored before the start of the "At" time period, and the distance between said elements (4.1, 4.2) censored at the end of said "At" time period. The found value of said distance variation between the fixed points (p1, p2) is discounted from the distance measurements provided by each laser displacement transducer (1.2) for the period of time "At", when determining the magnitude of the movement experienced by each moving point (p3) of the structure (2).
    [0115]
    [0116] In any case, automatically, it is possible to know how much each moving point (p3) of the structure (2) moved in the period of time "At" monitored.
    权利要求:
    Claims (12)
    [1]
    1. -System for measuring and monitoring movements in structures, comprising at least one measuring set (1) distance between a fixed reference and a mobile reference, each measuring set (1) includes at least one target element (1.1) and a laser displacement transducer (1.2) pointed towards said target element (1.1), the laser displacement transducer (1.2) is adapted to measure variations in distance from the corresponding target element (1.1) generated by vertical movements in a structure (2), characterized in that the target element (1.1) and the laser displacement transducer (1.2) are arranged on the structure (2), where, the target element (1.1) is the fixed reference and the Laser displacement transducer (1.2) is the mobile reference.
    [2]
    2. - System according to claim 1, wherein the target element (1.1) is fixed to a support cable (3) postted between two fixed points (p1, p2) of the structure (2).
    [3]
    3. System according to claim 1, wherein the laser displacement transducer (1.2) is fixed to a movable point (p3) of the structure (2), such that with said laser displacement transducer (1.2) can measure the distance variation of the moving point (p3) with respect to the corresponding target element (1.1).
    [4]
    4. -System according to claims 2 and 3, wherein so many target elements (1.1) and laser displacement transducers (1.2) are fixed on moving points (p3) of the structure (3) on the support cable (3). two).
    [5]
    5. - System according to claim 2, wherein the fixed points (p1, p2) are circumscribed to two ends of a longitudinal axis (e) extended horizontally between two supports (2.1) of the structure (2).
    [6]
    6. System according to claim 5, comprising an auxiliary set of measuring (4) distance between two fixed points (p1, p2) of the structure (2).
    [7]
    7. - System according to claim 6, comprising at least two measuring sets (1) and an auxiliary measuring set (4) extended between the fixed points (p1, p2) of ends (e1, e2) of said sets of measurement (1).
    [8]
    8. System according to claim 6, wherein the auxiliary measuring assembly (4) includes a target element (4.1) and a laser displacement transducer (4.2) pointed towards said target element (4.1), wherein, the Laser displacement transducer (4.2) is adapted to measure variations in distance from the corresponding target element (4.1) generated by horizontal movements in the structure (2).
    [9]
    9. - System according to claim 8, wherein the target element (4.1) of the auxiliary measuring assembly (4) is fixed to a second support cable (5) post-tensioned between two fixed points (p1, p2) of the structure (2), and the laser displacement transducer (4.2) of the auxiliary measuring assembly (4) is fixed to an intermediate fixed point (p4) above an intermediate support (2.2) that is arranged between the supports (2.1) of the structure (2).
    [10]
    10. System according to claims 1 or 8, wherein each laser displacement transducer (1.2, 4.2) is connected to data recording means (6) adapted to collect and store the variations of distances measured by each displacement transducer laser (1.2, 4.2).
    [11]
    11. System according to claim 10, wherein the data recording means (6) are connected to automated data processing means (7).
    [12]
    12. System according to claim 11, wherein the automated data processing means (7) is a personal computer.
    类似技术:
    公开号 | 公开日 | 专利标题
    ES2378089T3|2012-04-04|Method for determining loads and damages of a mechanical structure
    Scaioni et al.2014|Photogrammetric techniques for monitoring tunnel deformation
    US7895015B2|2011-02-22|Method for measuring the structural health of a civil structure
    US3908281A|1975-09-30|Real estate appraisal instrument and method
    ES2734141B2|2021-01-11|System for measuring and monitoring movements in structures
    WO2014043825A1|2014-03-27|Real-time structural measurement | for control devices
    CN204313844U|2015-05-06|A kind of noncontact monitoring measurement controls flag-rod
    Tuno et al.2018|A Simulation Analysis on the Expected Horizontal Accuracy of a Bridge Stakeout
    Wyczałek et al.2019|Monitoring of the static and dynamic displacements of railway bridges with the use of the total station and set of the electronic devices
    CN108469250A|2018-08-31|Reciprocal sight scale reads formula composite level measurement method and device certainly
    Monego et al.2019|3-D Survey of Rocky Structures: The Dolomitic Spire of the Gusela del Vescovà
    Vráblík et al.2009|Measurement of bridge body across the river Labe in Mělník
    Voina et al.2016|Considerations on the ways of determining the movement of the earth's surface due to the phenomenon of subsidence
    Chen et al.2020|Computer vision–based sensors for the tilt monitoring of an underground structure in a landslide area
    Dominici et al.2008|An integrated monitoring system for the monumental walls of Amelia
    Jáuregui et al.2002|Static measurement of beam deformations via close-range photogrammetry
    RU2469268C1|2012-12-10|Device for surveying pillar mining sections
    JP2022024519A|2022-02-09|Surveying system, chopstick installation support method, chopstick installation support program
    Balek et al.2016|Laboratory testing of the precision and accuracy of the shape Accel Array sensor in horizontal installation
    MICHAL et al.2015|Development deflection of prestressed concrete bridge
    GB2167182A|1986-05-21|Universal measuring gauge for geological structures
    KR20030077876A|2003-10-04|The sensor system for measurement of tunnel endurance displacement and its ceiling subsidence
    CN208254461U|2018-12-18|Reciprocal sight scale reads formula composite level certainly
    Yang et al.2017|Application of bridge continuous shape measurement system based on optical fiber sensing technology in bridge post-seismic detection
    KR100994821B1|2010-11-17|Measuring apparatus for horizontal movement of main tower of bridge
    同族专利:
    公开号 | 公开日
    ES2734141B2|2021-01-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4843372A|1988-01-21|1989-06-27|Thomas Savino|Bridge sway and deflection detection system|
    US5404132A|1994-03-14|1995-04-04|Canty; Jeffery N.|Deflection monitoring system|
    US6240783B1|1998-05-02|2001-06-05|Usbi, Co|Bridge monitoring system|
    EP2444787A1|2010-10-22|2012-04-25|Vilnius Gediminas Technical University|Method and device for bridge state evaluation using dynamic method|
    JP2015078554A|2013-10-18|2015-04-23|公益財団法人鉄道総合技術研究所|Bridge pier soundness evaluation method and bridge pier soundness evaluation device|
    法律状态:
    2019-12-04| BA2A| Patent application published|Ref document number: 2734141 Country of ref document: ES Kind code of ref document: A1 Effective date: 20191204 |
    2021-01-11| FG2A| Definitive protection|Ref document number: 2734141 Country of ref document: ES Kind code of ref document: B2 Effective date: 20210111 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201830539A|ES2734141B2|2018-06-04|2018-06-04|System for measuring and monitoring movements in structures|ES201830539A| ES2734141B2|2018-06-04|2018-06-04|System for measuring and monitoring movements in structures|
    [返回顶部]