CN104880143A - Bridge type resistor strain sensor multi-mode fault detection device - Google Patents
Bridge type resistor strain sensor multi-mode fault detection device Download PDFInfo
- Publication number
- CN104880143A CN104880143A CN201510282146.4A CN201510282146A CN104880143A CN 104880143 A CN104880143 A CN 104880143A CN 201510282146 A CN201510282146 A CN 201510282146A CN 104880143 A CN104880143 A CN 104880143A
- Authority
- CN
- China
- Prior art keywords
- circuit
- strain sensor
- bridge
- fault
- resistance strain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measurement Of Force In General (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a bridge type resistor strain sensor multi-mode fault detection device; under a broken line open circuit fault or a lead wire short circuit fault or a combined fault mode, a bridge type resistor strain sensor output line is pre-biased through a bias circuit; a high frequency signal is filtered by a radio frequency noise suicide circuit; the bridge type resistor strain sensor output line enters an instrument amplification circuit; the instrument amplification circuit amplifies a difference signal outputted by the bridge type resistor strain sensor; the amplified difference signal is compared with a reference voltage, set by a fault discrimination reference voltage set circuit, in a level comparison circuit, thus determining various fault modes of the bridge type resistor strain sensor; logic integration is finally realized by the line and circuit so as to output a logic signal, thus determining whether the bridge type resistor strain sensor has fault or not. The bridge type resistor strain sensor multi-mode fault detection device needs less parts, is easy to buy, low in cost, thus realizing various functions of the instrument amplifier, and effectively reducing PCB area and cost.
Description
Technical field
The present invention relates to a kind of bridge-type resistance strain sensor failure detector.
Background technology
Bridge-type resistance strain sensor is that one utilizes metal elastic gonosome as flexible member, by being pasted onto elastic body sensitive part composition Wheatstone bridge, and deformation is converted to the measurement mechanism of electric signal under the excitation of additional power source.Bridge-type resistance strain sensor has static and dynamic performance excellence, resolution is high, error is little, measurement range is large, can work in various harsh and unforgiving environments, size is little, the advantage such as lightweight, cheap, numerous in variety, be convenient to select and a large amount of use, at power, pressure, weigh, displacement, acceleration, multiple thermometrically field such as moment of torsion be widely used.
The Wheatstone bridge that bridge-type resistance strain sensor is formed generally has four lead-in wires, two power supply signals and two sensor output difference sub-signals, open fault and integrated mode thereof and short trouble and integrated mode thereof are common bridge-type resistance strain sensor failure modalities.Therefore, various faults mode can be detected in industrial and agricultural production simultaneously, especially the application that Aero-Space etc. are high to reliability requirement has urgent technical need, but known technology effectively can not detect the multiple modalities fault of such sensor simultaneously at present.Patent CN201210176421 " a kind of Electric Brake System of Aircraft pressure transducer redundant apparatus and control method " proposes to adopt discriminating sensor output valve whether to exceed the method for fault threshold, but only can detect some sensor broken string open fault, can not effectively differentiate the open fault of Various Complex integrated mode and short trouble.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides the multi-modal failure detector of a kind of bridge-type resistance strain sensor.
The technical solution adopted for the present invention to solve the technical problems is: comprise bridge-type resistance strain sensor, biasing circuit, Radio frequency interference (RFI) suppress circuit, magnifier, fault distinguishing reference voltage arrange circuit, level comparison circuit and line and circuit.
Under broken string open fault or lead short circuit fault and combined fault pattern thereof, described bridge-type resistance strain sensor output line carries out prebias by biasing circuit, magnifier is entered after suppressing circuit filtering high-frequency signal by Radio frequency interference (RFI) again, magnifier amplifies the differential signal that bridge-type resistance strain sensor exports, differential signal after amplification arranges the reference voltage that circuit arranges and compares in level comparison circuit with fault distinguishing reference voltage, thus judge the various fault modes of bridge-type resistance strain sensor, eventually through line and circuit realiration logic synthesis, export a logical signal, differentiate whether bridge-type resistance strain sensor breaks down.
The bias voltage of described biasing circuit is bridge-type resistance strain sensor supply voltage.
Described Radio frequency interference (RFI) suppresses circuit to adopt low pass R-C wave filter.
Described bridge-type resistance strain sensor comprises force snesor, pressure transducer, LOAD CELLS, displacement transducer, acceleration transducer and torque sensor.
The invention has the beneficial effects as follows:
1) bridge-type resistance strain sensor broken string open fault and integrated mode thereof can be detected;
2) bridge-type resistance strain sensor lead short circuit fault and integrated mode (except VDD-to-VSS line short trouble, this fault can cause power protection or burn) thereof can be detected;
3) required component number is few, and all components and parts are conventional device, is easy to buy, with low cost;
4) can this circuit be integrated in instrument amplifier, realize the functional diversities of instrument amplifier and PCB surface sum cost can be effectively reduced.
Accompanying drawing explanation
Fig. 1 is bridge-type strain transducer total failure mode fault detection method schematic diagram.
In figure, 1-bridge-type resistance strain sensor, 2-biasing circuit, 3-Radio frequency interference (RFI) suppresses circuit, and 4-magnifier, 5-fault distinguishing reference voltage arranges circuit, 6-level comparison circuit, 7-line and circuit.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described, the present invention includes but be not limited only to following embodiment.
As shown in Figure 1, system comprises bridge-type resistance strain sensor 1, biasing circuit 2, Radio frequency interference (RFI) suppress circuit 3, magnifier 4, fault distinguishing reference voltage arrange circuit 5, level comparison circuit 6, line and circuit 7.Ultimate principle of the present invention is namely: when under sensor broken string open fault and combined fault pattern thereof or sensor lead short trouble and combined fault pattern thereof, biasing circuit 2 plays the effect providing voltage bias, now Sensor output will exceed fault distinguishing reference voltage and arrange the scope of the reference voltage set by circuit 5 near the position of biasing circuit 2, by level comparison circuit 6 and line and circuit 7, can by fault detect out and comprehensive become a road logical signal export.
Biasing circuit 2 is for providing prebias for system, and bias voltage is bridge-type resistance strain sensor 1 supply voltage, chooses larger biasing resistor by calculating, less to ensure the impact of measuring accuracy.Radio frequency interference (RFI) suppresses circuit 3 for the high-frequency signal of filtering amp.in, general employing low pass R-C wave filter.Magnifier 4 is the core of whole bridge-type resistance strain sensor 1 signal conditioning circuit, for amplifying the differential signal that bridge-type resistance strain sensor 1 exports, therefore require that magnifier 4 has higher common-mode rejection ratio, for ensureing the good power supply characteristic of instrument amplifier in magnifier 4, need to carry out good filtering to instrument amplifier power supply.Fault distinguishing reference voltage arranges circuit 5 for arranging corresponding reference voltage, for rear class level comparison circuit 6 provides datum.Level comparison circuit 6, for differentiating the various fault modes of bridge-type resistance strain sensor 1, realizes logic synthesis by line and circuit 7, finally only exports a logical signal, differentiates whether bridge-type resistance strain sensor 1 breaks down for late-class circuit.
In this embodiment, above-mentioned bridge-type resistance strain sensor 1 may be the various sensors such as force snesor, pressure transducer, LOAD CELLS, displacement transducer, acceleration transducer, torque sensor, but its core sensory package is bridge-type resistance strain gage.
In this embodiment, above-mentioned biasing circuit 2 comprises resistance R2 and R6, wherein R2 is pull-up biasing resistor, R6 is pull-down bias resistance, require that R2 and R6 resistance is chosen in calculating according to the brachium pontis resistance of bridge-type resistance strain sensor 1, system accuracy, this embodiment is chosen R2 and R6 resistance and is 3M Ω.
In this embodiment, above-mentioned Radio frequency interference (RFI) suppresses circuit 3 to comprise resistance R3, R5 (R3=R5) and electric capacity C3, C4, C5, for forming low-pass filter (wherein C3=C5, C4 >=10 × C3), filtering high frequency differential mode and common-mode noise.Wherein differential mode filter cutoff frequency is:
Common-mode filter cutoff frequency is:
In this embodiment, magnifier 4 comprises instrument amplifier AD620, C1, C2, C6, C7 and R4.C1, C2, C6, C7 are electric source filter circuit, and R4 is instrument amplifier AD620 gain setting resistor.Also other instrument amplifier can be adopted, as AD623, AD625, INA321, AD8230 etc.
Above-mentioned fault distinguishing reference voltage arranges reference voltage set by circuit 5 and arranges according to bridge-type resistance strain sensor 1 maximum output voltage scope, generally leaves certain allowance, and carries out good filtering process, ensures the stability of reference voltage.In this embodiment, adopt the form of electric resistance partial pressure, mainly comprise R8, R9, R10, R11, C9 and C10, two-way reference voltage is set and is respectively 4V and 6V.Also the form of reference voltage chip can be adopted to realize.
In this embodiment, level comparison circuit 6 adopts integrated comparator LM239J to realize, and also can adopt other forms of comparer.
In this embodiment, line is actual with circuit 7 is coordinated by integrated comparator LM239J to realize, and because LM239J is for opening leakage output form, therefore only LM239J tetra-tunnel need be exported short circuit and be pulled upward to LM239J power supply by resistance R7.
Claims (4)
1. the multi-modal failure detector of bridge-type resistance strain sensor, comprise bridge-type resistance strain sensor, biasing circuit, Radio frequency interference (RFI) suppresses circuit, magnifier, fault distinguishing reference voltage arranges circuit, level comparison circuit and line and circuit, it is characterized in that: under broken string open fault or lead short circuit fault and combined fault pattern thereof, described bridge-type resistance strain sensor output line carries out prebias by biasing circuit, magnifier is entered after suppressing circuit filtering high-frequency signal by Radio frequency interference (RFI) again, magnifier amplifies the differential signal that bridge-type resistance strain sensor exports, differential signal after amplification arranges the reference voltage that circuit arranges and compares in level comparison circuit with fault distinguishing reference voltage, thus judge the various fault modes of bridge-type resistance strain sensor, eventually through line and circuit realiration logic synthesis, export a logical signal, differentiate whether bridge-type resistance strain sensor breaks down.
2. the multi-modal failure detector of bridge-type resistance strain sensor according to claim 1, is characterized in that: the bias voltage of described biasing circuit is bridge-type resistance strain sensor supply voltage.
3. the multi-modal failure detector of bridge-type resistance strain sensor according to claim 1, is characterized in that: described Radio frequency interference (RFI) suppresses circuit to adopt low pass R-C wave filter.
4. the multi-modal failure detector of bridge-type resistance strain sensor according to claim 1, is characterized in that: described bridge-type resistance strain sensor comprises force snesor, pressure transducer, LOAD CELLS, displacement transducer, acceleration transducer and torque sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282146.4A CN104880143B (en) | 2015-05-28 | 2015-05-28 | A kind of multi-modal failure detector of bridge-type resistance strain sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282146.4A CN104880143B (en) | 2015-05-28 | 2015-05-28 | A kind of multi-modal failure detector of bridge-type resistance strain sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104880143A true CN104880143A (en) | 2015-09-02 |
| CN104880143B CN104880143B (en) | 2017-12-26 |
Family
ID=53947734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510282146.4A Expired - Fee Related CN104880143B (en) | 2015-05-28 | 2015-05-28 | A kind of multi-modal failure detector of bridge-type resistance strain sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104880143B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300449A (en) * | 2015-11-03 | 2016-02-03 | 杭州钛比科技有限公司 | Ultra-low power consumption passive structure health monitoring system and method |
| JP2017120241A (en) * | 2015-12-29 | 2017-07-06 | ティアック株式会社 | Sensor abnormality detection device |
| CN107063410A (en) * | 2017-04-12 | 2017-08-18 | 无锡研测技术有限公司 | Resistance-strain type digital weighing sensor with fault detect |
| CN111623954A (en) * | 2020-04-30 | 2020-09-04 | 中国航天空气动力技术研究院 | Wind tunnel balance bridge fault detection method |
| CN112697343A (en) * | 2021-03-23 | 2021-04-23 | 上海艾为微电子技术有限公司 | Detection circuit and method of resistance bridge type pressure sensor, electronic equipment and chip |
| EP4134684A4 (en) * | 2020-04-09 | 2023-08-30 | Minebea Mitsumi Inc. | Fault detection circuit and detection system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440234A (en) * | 1992-10-07 | 1995-08-08 | Nec Corporation | Fault detecting circuit incorporated in semiconductor sensor and effective against any fault having influence on output voltage of a circuit component of the sensor |
| CN101269627A (en) * | 2008-05-13 | 2008-09-24 | 清华大学 | Vehicle mounted electrical apparatus driving circuit module with failure diagnosis function |
| CN101355313A (en) * | 2008-08-05 | 2009-01-28 | 杭州四达电炉成套设备有限公司 | Self-checking circuit for switchingin of three-phase rectifier |
| CN201247401Y (en) * | 2008-08-25 | 2009-05-27 | 中国矿业大学 | Apparatus for collecting and processing signal of subway stray current optical fiber sensing system |
| CN102156425A (en) * | 2010-12-20 | 2011-08-17 | 北京航空航天大学 | Device for monitoring health status of welding spot of digital integrated circuit in real time |
| CN103518141A (en) * | 2011-04-05 | 2014-01-15 | 萨甘安全防护公司 | Method and system for detecting a short-circuit affecting a sensor |
| CN103744013A (en) * | 2014-01-21 | 2014-04-23 | 上海新世纪机器人有限公司 | Full control bridge circuit fault diagnosis method |
-
2015
- 2015-05-28 CN CN201510282146.4A patent/CN104880143B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440234A (en) * | 1992-10-07 | 1995-08-08 | Nec Corporation | Fault detecting circuit incorporated in semiconductor sensor and effective against any fault having influence on output voltage of a circuit component of the sensor |
| CN101269627A (en) * | 2008-05-13 | 2008-09-24 | 清华大学 | Vehicle mounted electrical apparatus driving circuit module with failure diagnosis function |
| CN101355313A (en) * | 2008-08-05 | 2009-01-28 | 杭州四达电炉成套设备有限公司 | Self-checking circuit for switchingin of three-phase rectifier |
| CN201247401Y (en) * | 2008-08-25 | 2009-05-27 | 中国矿业大学 | Apparatus for collecting and processing signal of subway stray current optical fiber sensing system |
| CN102156425A (en) * | 2010-12-20 | 2011-08-17 | 北京航空航天大学 | Device for monitoring health status of welding spot of digital integrated circuit in real time |
| CN103518141A (en) * | 2011-04-05 | 2014-01-15 | 萨甘安全防护公司 | Method and system for detecting a short-circuit affecting a sensor |
| CN103744013A (en) * | 2014-01-21 | 2014-04-23 | 上海新世纪机器人有限公司 | Full control bridge circuit fault diagnosis method |
Non-Patent Citations (1)
| Title |
|---|
| 李兵强等: "被动式电动加载系统用角加速度计设计", 《微特电机》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300449A (en) * | 2015-11-03 | 2016-02-03 | 杭州钛比科技有限公司 | Ultra-low power consumption passive structure health monitoring system and method |
| CN105300449B (en) * | 2015-11-03 | 2018-04-10 | 杭州钛比科技有限公司 | A kind of super low-power consumption passive structures health monitoring systems and method |
| JP2017120241A (en) * | 2015-12-29 | 2017-07-06 | ティアック株式会社 | Sensor abnormality detection device |
| CN107063410A (en) * | 2017-04-12 | 2017-08-18 | 无锡研测技术有限公司 | Resistance-strain type digital weighing sensor with fault detect |
| CN107063410B (en) * | 2017-04-12 | 2019-02-15 | 无锡研测技术有限公司 | Resistance-strain type digital weighing sensor with fault detection |
| EP4134684A4 (en) * | 2020-04-09 | 2023-08-30 | Minebea Mitsumi Inc. | Fault detection circuit and detection system |
| JP7542982B2 (en) | 2020-04-09 | 2024-09-02 | ミネベアミツミ株式会社 | Fault detection circuit and detection system |
| CN111623954A (en) * | 2020-04-30 | 2020-09-04 | 中国航天空气动力技术研究院 | Wind tunnel balance bridge fault detection method |
| CN111623954B (en) * | 2020-04-30 | 2022-04-12 | 中国航天空气动力技术研究院 | Wind tunnel balance bridge fault detection method |
| CN112697343A (en) * | 2021-03-23 | 2021-04-23 | 上海艾为微电子技术有限公司 | Detection circuit and method of resistance bridge type pressure sensor, electronic equipment and chip |
| CN112697343B (en) * | 2021-03-23 | 2021-07-16 | 上海艾为微电子技术有限公司 | Detection circuit and method of resistance bridge type pressure sensor, electronic equipment and chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104880143B (en) | 2017-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104880143A (en) | Bridge type resistor strain sensor multi-mode fault detection device | |
| CN103913259B (en) | There is the sextuple torque sensor acquisition system of robot end of auto-compensation and drift compensation method thereof and zero point drift preparation method | |
| CN102323004A (en) | A kind of switching value differential pressure pick-up | |
| CN104062327B (en) | For capacity transducer complementation excitation and the linear detection circuit of oil plant detection | |
| CN202066953U (en) | Magnetic sensor | |
| CN202013316U (en) | Differential pressure type flow resistance tester | |
| CN208334490U (en) | A kind of micro-current Precision measurement circuit | |
| CN202126325U (en) | Switching value differential pressure sensor | |
| US10330719B2 (en) | Pickoff transducer wire bond bit detection | |
| CN204346632U (en) | A kind of differential pressure pickup adopting composite bridge road | |
| CN203011606U (en) | Resistance strain gauge based intelligent pressure detecting system | |
| CN201277898Y (en) | Double core differential pressure transmitter | |
| CN208848280U (en) | A kind of double Hall thickness measuring module control devices of difference | |
| CN210323186U (en) | Current detection circuit | |
| CN202141810U (en) | High precision natural electric field physical prospecting measuring apparatus | |
| CN201449300U (en) | Programmable pressure sensor | |
| CN103471704B (en) | Measure optical fiber sensing system and the method for oscillation of rotary machine rotor | |
| CN109870589A (en) | A kind of velocity sensor | |
| CN208187335U (en) | A kind of capacitive displacement sensing device that transmission is isolated at a distance based on dual transformer | |
| CN101949887A (en) | Semiconductor gas sensor and various gas detection method thereof | |
| CN102778585A (en) | Sensing device | |
| CN203349849U (en) | Driving test cake magnetic induction sensor detection device | |
| CN201111205Y (en) | Bill counter magnetism detecting sensor | |
| CN105807086B (en) | Intelligent sensor | |
| CN213986676U (en) | Circuit for eliminating light scattering fluctuation interference of laser phase-locked loop |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20180528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |