CN1125845A - Method of making dynamic calibration for force sensor - Google Patents

Method of making dynamic calibration for force sensor Download PDF

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Publication number
CN1125845A
CN1125845A CN 94113375 CN94113375A CN1125845A CN 1125845 A CN1125845 A CN 1125845A CN 94113375 CN94113375 CN 94113375 CN 94113375 A CN94113375 A CN 94113375A CN 1125845 A CN1125845 A CN 1125845A
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CN
China
Prior art keywords
test specimen
sensor
force
scaling
charger
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Application number
CN 94113375
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Chinese (zh)
Inventor
张于北
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中国航空工业总公司第三零四研究所
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Application filed by 中国航空工业总公司第三零四研究所 filed Critical 中国航空工业总公司第三零四研究所
Priority to CN 94113375 priority Critical patent/CN1125845A/en
Publication of CN1125845A publication Critical patent/CN1125845A/en

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Abstract

The dynamic calibration method for force sensor features that a specimen is put between the force sensor to be calibrated and a loader and the loader applies load to the specimen until it is broken. The output of the sensor is recorded by transient recorder or digital storage oscillascope and its frequency characteristics are calculated out.

Description

Method to making dynamic calibration for force sensor

The invention belongs to the sensor test field, relate to improvement the force transducer dynamic calibrating method.

To making dynamic calibration for force sensor is crucial.Timing signal need act on sensor with a negative step force.Adopt in the existing method and drop hammer or shaking table or the negative step force of shock tube generation, they have shortcoming separately.The frequency range of the power that produces of dropping hammer is narrow.Shaking table can't drive the big sensor of quality.Shock tube is all inapplicable to sensor, the quality of frequency below 5KHz big sensor and sensor in irregular shape.There is one piece of article " research of the Dynamic Repeatability of force transducer, the linearity and improvement in performance " (hereinafter to be referred as " research ") 1994 the 8th the 2nd phases of volume of " test journal " supplementary issue that China military engineering meeting measuring technology association publishes, and wherein the P53-54 page or leaf discloses a kind of method and apparatus that produces negative step force.This method is that the hard brittle material sheet is clipped in by between calibration sensor and the charger, when the hard brittle material sheet hold can't stand load fracture after, force transducer just obtains a negative step force.Change the step force value by the physical dimension that changes the hard brittle material sheet.It is which kind of material and available minimum force value that this article does not indicate used.The load mode that adopts in the literary composition is to apply resistance to bending to the hard brittle material sheet, promptly loads between two fulcrums that holding in the palm the hard brittle material sheet.

The purpose of this invention is to provide a kind of wide frequency range, the power value is changeable, be applicable to the dynamic calibrating method of various sensors.

Technical scheme of the present invention is: a kind of method to making dynamic calibration for force sensor, act on sensor with a negative step force, output with instantaneous state recorder or digital storage oscilloscope acquisition and recording sensor, the calculated rate characteristic, it is characterized in that, produce the negative step force as pumping signal: a, preparation test specimen according to the following steps: select Be worth high material test specimen, wherein E is the elastic modulus of material, and ρ is the proportion of material, Value big more, fast more with the velocity of propagation of longitudinal sound wave in the bar-shaped solid of this made, the ability of propagating high-frequency signal is strong more.Spendable material has pottery, adamas, glass, high-speed steel, nodular cast iron, recommends to use Stupalith greater than 8000m/s; B, clamping test specimen: test specimen is installed in is fixed between force transducer in the framework, that desire is demarcated and the charger; C, loading: load to test specimen by charger, rupture up to test specimen.Compare with disclosed method in " research ", distinguishing characteristics of the present invention mainly is:

The first, to select the standard of material be to get in the present invention Be worth high material, particularly stupalith.The anti-pressure ability of pottery is very strong, so can produce and transmit the more negative step of value; The bending resistance of pottery is very weak, so can produce and transmit the negative step than small value force again, it is the good material of making test specimen.When selecting metal material, its HRc should be greater than 65.

The second, the mounting means to test specimen has two kinds, and the one, test specimen is horizontal, name a person for a particular job with two that it is propped, in the middle of two fulcrums, load.The present invention can also adopt the method for vertically-arranged test specimen, and test specimen is made the thin bar of growing up, and slenderness ratio is 5: 1~20: 1, during loading from the two ends of test specimen along its length to center loaded.In this load mode, test specimen is subjected to the pressure along its length direction, and when reaching certain numerical value, test specimen bends, ruptures.Change the physical dimension or the cross sectional shape of test specimen, can obtain different negative step force values.Often the test specimen cross section of using is square or rectangle.Also can be circular, annular polygon.

Used charger can use hydraulic pressure, air pressure or mechanical load mode, for example hangs weights or other mechanical forces.Use hydraulic means pressure is big and load steady.The power value that loads can be measured by device for measuring force.But carried out static demarcating by the force transducer demarcated, so the power value of dynamic load can be calculated by the output of sensor, needn't measure separately.

Advantage of the present invention is: the wide frequency range of demarcation, negative step force value is changeable, is applicable at present existing various types of sensors, no matter how invisible it is, no matter also its weight is much, can carries out accurate dynamic with method of the present invention and demarcate.Such as prior art generally can only spot frequency in the dynamic property of hundreds of to the strain force sensor of several kilo hertzs of sesames, and the inventive method can be carried out dynamic calibration to the piezoelectric force transducer up to 100KHz.

Description of drawings.Fig. 1 is a schematic diagram of device of demarcating force transducer with method of the present invention.Fig. 2 is the output response curve that the force transducer that a model is 9371A is demarcated.Fig. 3 is the frequency characteristic of 9371A force transducer.Fig. 4 is the output response curve of resonant frequency at the sensor of 70KHz.Fig. 5 is the output response curve of resonant frequency at the sensor of 30KHz.

Among Fig. 1, the 1st, the sensor of being demarcated, the 2, the 4th, cushion block prevents to weigh wounded sensor, and the 3rd, test specimen, the 5th, hydraulic cylinder, the 6th, frame, fixedly test specimen and hydraulic cylinder, the 7th, registering instrument, record signal of sensor.Here test specimen 3 is vertically-arrangeds.Also can be horizontal, on hydraulic cylinder piston, put a bigger cushion block, put two supports again, the test specimen frame on supporting, is put a small cushion block on the test specimen in the middle of two fulcrums, contact with the sensor of being demarcated.At this moment, test specimen directly bears resistance to bending.Fig. 2,3 is to use the calibration result of an embodiment of calibration sensor of the present invention, Fig. 4 is the embodiment that the sensor of resonant frequency 70KHz is demarcated, Fig. 5 is the embodiment that the sensor of resonant frequency 30KHz is demarcated, and the performance curve of making is very accurately.

Claims (6)

1, a kind of method to making dynamic calibration for force sensor, act on sensor with a negative step force, with the output of instantaneous state recorder or digital storage oscilloscope acquisition and recording sensor, calculated rate characteristic, it is characterized in that, produce negative step force according to the following steps as pumping signal:
(1), preparation test specimen: select Be worth high material test specimen, E is the elastic modulus of material, and ρ is a proportion, and spendable material has pottery, adamas, glass, high-speed steel, nodular cast iron,
(2), the clamping test specimen: test specimen be installed in be fixed between force transducer in the framework, that desire is demarcated and the charger,
(3), load: load to test specimen by charger, rupture up to test specimen.
2, scaling method according to claim 1 is characterized in that, spendable material has pottery, adamas, glass, high-speed steel, nodular cast iron,
3, scaling method according to claim 1 and 2 is characterized in that, said test specimen is long thin bar, and slenderness ratio is 5: 1~20: 1, during loading from the two ends of test specimen along its length to center loaded.
4, scaling method according to claim 3 is characterized in that, the cross section of said test specimen is square or rectangle.
4, scaling method according to claim 1 and 2 is characterized in that, said charger can use hydraulic pressure, air pressure or mechanical load mode.
5, scaling method according to claim 3 is characterized in that, said charger can use hydraulic pressure, air pressure or mechanical load mode.
CN 94113375 1994-12-28 1994-12-28 Method of making dynamic calibration for force sensor CN1125845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 94113375 CN1125845A (en) 1994-12-28 1994-12-28 Method of making dynamic calibration for force sensor

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Application Number Priority Date Filing Date Title
CN 94113375 CN1125845A (en) 1994-12-28 1994-12-28 Method of making dynamic calibration for force sensor

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CN1125845A true CN1125845A (en) 1996-07-03

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CN 94113375 CN1125845A (en) 1994-12-28 1994-12-28 Method of making dynamic calibration for force sensor

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101526456B (en) * 2009-03-31 2011-01-05 江苏大学 Fine dried noodles elasticity modulus measuring method based on pressure lever post-buckling
CN102539067A (en) * 2011-12-20 2012-07-04 北京动力机械研究所 Device and method for simulating underwater calibration of underwater thrust sensor
CN103185658A (en) * 2011-12-28 2013-07-03 中国航空工业集团公司北京长城计量测试技术研究所 Periodic force loading device
CN103245458A (en) * 2013-04-07 2013-08-14 北京机械设备研究所 Half-sine quasi-static calibration device of force sensor
CN103712744A (en) * 2014-01-10 2014-04-09 浙江大学 Positive step force testing system
CN104568306A (en) * 2014-12-30 2015-04-29 中国航空工业集团公司北京航空精密机械研究所 Dynamic performance calibration device for force sensor
CN105333993A (en) * 2015-11-18 2016-02-17 北京理工大学 Micro-force sensor dynamic calibration system and method based on micro negative step force
CN107621332A (en) * 2017-07-28 2018-01-23 大连理工大学 A kind of scaling method of branched piezoelectric force instrument

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101526456B (en) * 2009-03-31 2011-01-05 江苏大学 Fine dried noodles elasticity modulus measuring method based on pressure lever post-buckling
CN102539067A (en) * 2011-12-20 2012-07-04 北京动力机械研究所 Device and method for simulating underwater calibration of underwater thrust sensor
CN103185658A (en) * 2011-12-28 2013-07-03 中国航空工业集团公司北京长城计量测试技术研究所 Periodic force loading device
CN103185658B (en) * 2011-12-28 2015-05-20 中国航空工业集团公司北京长城计量测试技术研究所 Periodic force loading device
CN103245458A (en) * 2013-04-07 2013-08-14 北京机械设备研究所 Half-sine quasi-static calibration device of force sensor
CN103712744A (en) * 2014-01-10 2014-04-09 浙江大学 Positive step force testing system
CN103712744B (en) * 2014-01-10 2015-08-12 浙江大学 Positive step force pilot system
CN104568306A (en) * 2014-12-30 2015-04-29 中国航空工业集团公司北京航空精密机械研究所 Dynamic performance calibration device for force sensor
CN104568306B (en) * 2014-12-30 2017-05-03 中国航空工业集团公司北京航空精密机械研究所 Dynamic performance calibration device for force sensor
CN105333993A (en) * 2015-11-18 2016-02-17 北京理工大学 Micro-force sensor dynamic calibration system and method based on micro negative step force
CN105333993B (en) * 2015-11-18 2018-01-16 北京理工大学 Micro-force sensor dynamic calibration system and method based on small negative step force
CN107621332A (en) * 2017-07-28 2018-01-23 大连理工大学 A kind of scaling method of branched piezoelectric force instrument
CN107621332B (en) * 2017-07-28 2019-07-12 大连理工大学 A kind of scaling method of more fulcrum piezoelectric force instrument

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