• 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:
    An apparatus for measuring the flow rate of a gaseous or liquid medium includes a baffle member which is poised in the stream on an elastic holder and permitted to execute inherent periodic motions. The flowing medium exerts a damping action on the moving element and the energy lost to the medium is related to the flow rate. The inherent velocity of the baffle is sensed by an inductive velocity sensor and the resulting signal is used to alter the current through a coil which produces an accelerating magnetic field that acts on conductors rigidly attached to the baffle. Thus, the energy required to maintain the inherent motions of the baffle is known and the flow rate may be inferred.
    公开号:SU839451A3
    申请号:SU762312604
    申请日:1976-01-13
    公开日:1981-06-15
    发明作者:Клингер Хельмут；Глауерт Вольфрам
    申请人:Роберт Бош Гмбх (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to means for measuring flow.
    Measuring instruments are known for determining the flow rate of a medium flowing through a given cross section, in which, by the action of a flowing medium, proportional to the amount of medium, the measuring element deviates from the initial position
    The disadvantage of such devices is low measurement accuracy due to the presence of hysteresis effects.
    A measuring device is known for determining the flow rate of a medium flowing through a predetermined section containing an elastically fixed plate tapering to an end perpendicular to the flow direction and rigidly connected to the power compensation device by means of its normal plane shoulder and compensation indicator 2 .
    The disadvantage of this device is low accuracy due to the unsuitability of the power compensation device used in it.
    for measuring rapidly changing flows.
    The purpose of the invention is to improve the accuracy of the instrument for determining the flow rate of the medium.
    权利要求:
    Claims (2)
    [1]
    The goal is achieved in that the measuring device for determining the flow rate of a medium flowing through a given cross section, containing an elastically fixed plate perpendicular to the flow direction, is a flat plate narrowing towards the end, rigidly connected to the force compensating device by means of a perpendicular plane of the shoulder, and an indicator of the flow rate according to the expended energy of compensation, a magnetic-induction rocking speed sensor of the plate is introduced, made in the form of a stationary magnet with an output winding, having There is a working gap in which the end of the tapering plate is located with the tip of a ferromagnetic material of high magnetic permeability, the plate is fixed on a torsion spring located diametrically to the flow section, and the power compensating device is made in the form of a fixed-current electromagnet of constant current with a magnetic conductor the house, imekszdim working gap, and placed in it with the possibility of rotation in the plane of the working gap of the flat winding from r yes wire placed on a plate mounted on the perpendicular shoulder of a tapered plate that receives the flow, the winding of the magnetically induced swing speed sensor connected through one circuit through an amplifier with a flat winding of a power compensating device, and the other through a comparator The second input of which is connected to the source of the voltage, with the coil of the electromagnet of the power compensation device. To prevent the medium from flowing back before the plate, which perceives the flow action, a guide device is installed along the axis of the latter, made in the form of a fairing with radially arranged (with the possibility of elastic rotation) spring blades bent at an angle to the flow. FIG. Figures 1-4 show the constructional schemes for the implementation of a measuring device for determining the flow rate of a medium and its components in fig. 5 and 6 guiding apparatus; in fig. 7 and 8 are an electrical block diagram of a meter for determining flow rate options. The measuring device for determining the flow contains pipeline 1, through which the controlled flow flows through the cross-section, c. which, on a rigidly fixed on both sides torsion spring 2 is installed with the possibility of elastic rotation of the plate 3, perceiving the action of the flow. The plate is made symmetrically, metric with respect to the place of its fixing and tapering towards the ends as it moves away from the central axis of the cross section of the flow. At least one end of the plate 3 is fixed tip 4 of a material with high magnetic permeability. On the wall of the pipeline 1, a magnetically inductive sensor of the swing speed of the plate, having a permanent magnet 5 and a winding 6, is fixedly mounted. In the working gap of the magnet 5, the tip 4 of the plate 3 can be reciprocated. Along the flow axis, a perpendicular is attached to the downstream plate 3 the right shoulder, bearing the plate 7 (Fig. 2) with located on it. flat winding 8 in the video and parallel conductors. The plate 7 is placed in the working gap of the stationary magnetic circuit 9 of the electromagnet with a winding 10, the nature of the distribution of the field lines in which is determined by pole tips 11 and 12, which have a high magnetic permeability. In the cross section of the flow 1, a fairing 14 is mounted on the holder 13, which releases the predetermined central cross-sectional area of the flow from the flowing medium. The fairing 14 may be made in the form of a guide vial (fig. 5 and b), consisting of spring plates 15, radially mounted on the fairing 14. FIG. 5. two plates 15 are shown. The ends 16 of the plates 15 are bent at an angle to the direction of flow and under the action of the latter can be bent to the position 16, shown by the dotted line (Fig. 6). The winding b of the swing speed sensor plate, the winding 9 of the electromagnet and the flat winding 8 are included in the block diagram (Fig. 7) The winding b of the speed sensor of the swings is connected via an operational amplifier 17 to the flat winding 8 of the power compensating device, and through another circuit through a comparator 18, a one-shot 19, controlling a reversible counter 20, a code-frequency converter 21, a digital-to-analog converter 22, an RC circuit and an operational amplifier 23 is connected to the winding 10 of an electromagnet of a compensation device mechanically connected with a flow sensing plate 3. In the block diagram shown in Fig. 8, the speed sensor winding b is connected to the flat winding 8 via pulse shaper 24, and the reversible counter 20 is controlled by means of an .RC trigger 25 ( instead of a one-shot). The device works as follows. The gaseous or liquid medium flowing through the cross-section of the pipeline 1 acts on both symmetrical parts of the plate 3, thereby slowing its periodic periodic self-oscillations. The loss by the plate 3 of the oscillation energy over the duration of the period as a result of the influence of the flowing medium is proportional to the product of the intrinsic velocity Vg and the number of leakages per unit time of the medium. With a known intrinsic velocity Ve, by the amount of energy supplied to the plate 3, it is possible to determine the amount of medium flowing per unit time. To do this, using the swing speed sensor, the intrinsic speed Vg of the plate 3 is converted by the tip 4 on the resistance value of the magnetic circuit of the permanent magnet 5 to the voltage U of the winding 6. This voltage, proportional to the intrinsic swing speed of the plati 3, increases operational amplifier 17 (Fig. 7) and is fed to the flat winding 8 of the plate 7 of the compensation device located in the working gap of the magnetic circuit 9 of its electromagnet. In addition, the voltage UYQ is compared with the reference voltage at the comparator 18. The output of which includes the one-oscillator 19, controlling the reversible counter 20, and in the converter, the frequency frequency 21 is turned into a frequency proportional to the amount flowing. environment. This frequency in the digital-to-analog converter 22 is again transformed into a voltage that is fed through an RC circuit and operational amplifier 23 to a winding 10, which creates a magnetic field B, the intensity of which is proportional to the amount of flowing medium. As a result, the electrical conductors of the flat winding 8 are affected by the accelerating moment M, which compensates for the braking effect of the flow on the plate 3. The digital-to-analog converter 2 has a field-effect transistor 26, the gate of which is connected directly to the output of the code-often converter Ta and the field-effect transistor 27, the gate of which is connected to the output of the same converter through the inverter 28. Depending on which of the field-effect transistors opens, the output of the digital-to-analog converter 22 is connected to the source ku reference to direct voltage Uuep. or to the body. 3 shows the block diagram shown in FIG. 8, the voltage Uve. proportional, the plate's own speed is fed to the input of Impulse former 24, at the output of which a rectangular shape of constant amplitude is obtained, acting on a flat winding 8. However, the reversible counter 20 is controlled instead of a single vibrator P, C-trigger 25. At By moving the medium, the ends 16 of the plates 15 are bent under the action of the flow to the position 16, depicted by a dotted line. If the medium is flowing backward (opposite to the flow), then the ends of the 16 plates 15 are bent against the main flow so that they almost completely cover the cross section of the pipeline. Such a device is only necessary when it is necessary to determine the amount of medium flowing in the main flow direction. The proposed device, in comparison with the known, allows to increase the accuracy of measuring the flow rate of the medium. Claim 1. A measuring device for detecting a medium flowing through a predetermined section containing an elastically fixed plate that is narrowed at the end and rigidly fixed to the power compensation device by means of a shoulder mounted perpendicular to its plane, and an indicator of the flow rate along the expended energy of compensation, which is due to the fact that, in order to increase the accuracy, a magnetic-induction rocking speed sensor of the plate was inserted into it, made in the form of a fixed magnet with an output winding having a working gap in which the end of the tapered plate is arranged for movement, provided with a ferromagnetic material tip of high magnetic permeability, the plate being fixed to the torsion spring located diametrically to the flow section, and the power compensating device is made in the form of fixedly mounted for suzhakvdeys plate of an electromagnet of direct current with a magnetic core having a working gap, and placed in it with Turning in the plane of the working gap of a flat winding of a series of conductors deposited on a plate mounted on a perpendicular arm of a tapered plate that perceives the effect of flow, while the winding of the magnetic induction oscillation speed sensor is connected through one circuit through an amplifier with a flat winding of a power compensation device, and on the other, through a comparator, the second input of which is connected to a source of reference voltage, with an electromagnet coil of a power compensation device. 2. The measuring apparatus according to claim 1, characterized in that in front of the plate that perceives the flow action, along the axis of the latter, a guide device is installed, made in the form of a fairing with radially arranged (rotatably) spring plates bent at an angle to the flow . Sources of information taken into account during the examination 1.Agaykin D.I., Kostina E.N. and Kuznetsova N.N. Sensors of control and regulation. M., Mechanical Engineering, 1965, p. 717, FIG. YI, 33.
    [2]
    2.Shapov N.M. Hydrometry hydraulic structures and hydraulic machines. M.-L. , Gosenergoizdat, 1957, p. 148150, fig. 200 (prototype).
    u
    FIG. / 2
    ffi
    / 6
    15
    f
    f .5
    Phi2.5
    fJ
    17
    18
    26
    28
    lnf 22
    类似技术:
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    SU839451A3|1981-06-15|Medium flow rate gage
    EP0504224B1|1994-11-02|A flow tube drive circuit having a bursty output for use in a coriolis meter
    US5017867A|1991-05-21|Magnetostrictive linear position detector with reflection termination
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    US4558588A|1985-12-17|Vibrating needle viscosity meter
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    US3316768A|1967-05-02|Magnetic angular velocity indicating system
    US2349287A|1944-05-23|Device for controlling precessional forces in gyroscopes
    US3942369A|1976-03-09|Method of and apparatus for measuring and setting the tension of stressed members
    GB1591974A|1981-07-01|Mass throughflow meter
    SU129357A1|1959-11-30|Instrument for measuring fluid flow
    SU369402A1|1973-02-08|DEVICE FOR DETERMINATION OF FLOW RATE |
    SU819627A1|1981-04-07|Vibration-type viscometer
    SU565333A1|1977-07-15|Time relay
    US3618367A|1971-11-09|Vibration pick-up device
    US643392A|1900-02-13|Electric meter.
    SU977936A1|1982-11-30|Method of measuring electroconductive article thickness
    GB1249128A|1971-10-06|Improvements in or relating to angular rate sensors
    SU847240A1|1981-07-15|Magnetic ferrite meter
    US435550A|1890-09-02|Walker
    SU983614A1|1982-12-23|Magnetic ferrite meter
    SU149901A1|1961-11-30|Magnetic flow sensor
    SU720295A1|1980-03-05|Ball flow meter
    US480888A|1892-08-16|Electrical measuring-instrument
    SU1763892A1|1992-09-23|Flow transducer
    同族专利:
    公开号 | 公开日
    SE402975B|1978-07-24|
    GB1539411A|1979-01-31|
    US4024759A|1977-05-24|
    DE2501380B2|1978-05-11|
    IT1054071B|1981-11-10|
    JPS594647B2|1984-01-31|
    FR2298090A1|1976-08-13|
    JPS5196353A|1976-08-24|
    BR7600187A|1976-08-31|
    DE2501380A1|1976-07-22|
    FR2298090B1|1982-04-16|
    SE7600323L|1976-07-16|
    DE2501380C3|1979-01-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1215135A|1914-07-11|1917-02-06|Gen Electric|Fluid-flow-indicating mechanism.|
    DE366117C|1922-03-05|1922-12-29|Paul Boening Dipl Ing|Device for measuring the amount or speed of flowing substances|
    BE394587A|1932-02-25|
    US2358374A|1941-08-13|1944-09-19|Ernest G Ashcraft|Apparatus for determining physical properties of fluids|
    US2741918A|1949-11-28|1956-04-17|Phillips Petroleum Co|Velocity type flowmeter|
    BE513008A|1951-07-20|
    US3218851A|1961-05-24|1965-11-23|Anatole J Sipin|Mass flowmeter systems|
    US3175399A|1962-04-19|1965-03-30|Honeywell Inc|Fluid flow measuring apparatus|
    US3273389A|1963-12-09|1966-09-20|Charles C Waugh|Oscillating vane flowmeter|
    FR1460731A|1965-10-04|1966-03-04|Mass flow meter device|
    GB1186378A|1966-07-21|1970-04-02|Rosemount Eng Co Ltd|Improvements in or relating to Fluid Flow Measuring Apparatus|
    US3608374A|1969-03-18|1971-09-28|Honeywell Inc|Mass flowmeter|
    CH529996A|1971-01-25|1972-10-31|Heckle Manfred Ing Dr|Flow measurement method for fluid and device for carrying out the same|
    US3715920A|1971-04-20|1973-02-13|Honeywell Inc|Apparatus for determining the damping ratio of a second order vibration system|
    DE2404318A1|1974-01-30|1975-08-07|Bosch Gmbh Robert|Flowmeter with baffle plate - is designed so that plate is deflected by separated air streams to give oscillation at different frequencies|DE2746890A1|1977-10-19|1979-04-26|Bosch Gmbh Robert|MASS FLOW METER FOR FLOWING MEDIA|
    DE3124506A1|1981-06-23|1983-01-05|Robert Bosch Gmbh, 7000 Stuttgart|MASS FLOW METER AND EVALUATION FOR THAT|
    DE3224336C2|1982-06-30|1986-05-28|Audi AG, 8070 Ingolstadt|Flow meter|
    JPS6249565B2|1982-11-12|1987-10-20|Hitachi Ltd|
    GB8830257D0|1988-12-24|1989-02-22|Schlumberger Ind Ltd|A mass flow sensor|
    US5000050A|1990-03-12|1991-03-19|Ford Motor Company|Mass-flow sensor using aerodynamic damping|
    JPH04196574A|1990-11-28|1992-07-16|Mitsubishi Electric Corp|Lead frame|
    DE112004002042T5|2003-10-30|2006-09-14|Invensys Systems, Inc., Foxboro|Dynamic Response Characteristics of Flowmeters|
    US10126266B2|2014-12-29|2018-11-13|Concentric Meter Corporation|Fluid parameter sensor and meter|
    WO2016109447A1|2014-12-29|2016-07-07|Concentric Meter Corporation|Fluid parameter sensor and meter|
    US10107784B2|2014-12-29|2018-10-23|Concentric Meter Corporation|Electromagnetic transducer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19752501380|DE2501380C3|1975-01-15|1975-01-15|Mass flow meter for flowing media|
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