CN102455229A - High-precision sensor - Google Patents
High-precision sensor Download PDFInfo
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- CN102455229A CN102455229A CN201010527601XA CN201010527601A CN102455229A CN 102455229 A CN102455229 A CN 102455229A CN 201010527601X A CN201010527601X A CN 201010527601XA CN 201010527601 A CN201010527601 A CN 201010527601A CN 102455229 A CN102455229 A CN 102455229A
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Abstract
The invention relates to a high-precision sensor, which belongs to a mechanical testing technique, and can be applied to a friction and wear test on a friction testing machine. The high-precision sensor comprises an elastic body and a strain gauge, and belongs to a dynamometric technique. The high-precision sensor is characterized in that the elastic body is composed of a cantilever beam, a loading-end rectangular block and a fixed-end rectangular block, wherein the loading-end rectangular block is connected with one end of the cantilever beam, and the fixed-end rectangular block is connected with the other end of the cantilever beam. The high-precision sensor disclosed by the invention is simple in structure, high in integral stiffness of the elastic body, capable of accurately measuring a small-range contact force at an environmental temperature of minus 10 DEG C to 40 DEG C, and better in dynamic characteristics.
Description
Technical field
The present invention relates to a kind of high-precision sensor, belong to the mechanical test technology, particularly a kind of high-precision sensor that can be used for the friction-wear test of frictional testing machine.
Background technology
When carrying out some a small amount of journey frictional wear experiments, need very high measuring accuracy, so just need a kind of 2 D force transducer in small measurement range that can measure horizontal direction and vertical forces simultaneously of development.When the variation of ambient temperature, sensor also requires to have the temperature self-compensation function.For the natural frequency that requires sensor that satisfies dynamic test can not be low greatly.
At present a lot of 2 D force sensors that is used for friction test is a kind of to be combined sensor, and this sensor construction is complicated, inconvenience is installed, and only is applicable to than the wide range force measurement.
The silicon Micro-force sensor; Be designed to sensor elastomer to have this sensor construction employing of the silicon beam micromechanical process of semi-girder film and foil gauge resistance; Processing is complicated, though the force rate of test is less, measurement range is little; Do not have the influence of account temperature to sensor, the precision of sensor is not high.Because the rigidity of semi-girder is too little, the natural frequency of its sensor is low excessively, and dynamic perfromance is relatively poor, and changing sensor does not have the influence of account temperature to test result yet.
Requirement of experiment sensor itself can guarantee accurate test result all the time along with ambient temperature changes within the specific limits, also must reach certain dynamic test characteristic simultaneously.Above-mentioned sensor all can not well satisfy experimental requirements at aspects such as the precision of sensor itself and natural frequencys.
Summary of the invention
The object of the invention is to invent a kind of high-precision sensor, the power of this sensor ability while measuring vertical direction and horizontal direction, and both direction all has very high precision, and has than higher natural frequency.
Technical scheme of the present invention is: a kind of high-precision sensor; Comprise elastic body and foil gauge two parts, it is characterized in that said elastic body is made up of semi-girder, the loading end pane that links to each other with semi-girder one end, the stiff end pane that links to each other with the semi-girder other end; Run through the semi-girder upper and lower surfaces one groove is arranged; This groove is communicated with by " well " the type hole that is positioned at the semi-girder loading end with near " mouth " type hole of stiff end and forms; Run through the semi-girder front and rear surfaces and also have another groove; This groove is communicated with by " well " the type hole that is positioned at the semi-girder stiff end with near " mouth " type hole of loading end and forms, and two groups of groove structural symmetry wells intersect each other; The thin-walled outside surface respectively pastes two foil gauges along the center line symmetry respectively before and after " well " type hole of cantilever fine strain of millet loading end; Two foil gauges are respectively pasted along the center line symmetry respectively in " well " type hole of semi-girder stiff end up and down thin-walled outside surface; Post one group of compensating plate respectively in stiff end pane front and rear surfaces, each group comprises that all elastic modulus compensating plate, zero temperature compensation sheet and zero point be not in the weighing apparatus compensating plate; Four foil gauges of one group of compensating plate and loading end are formed a Hui Sideng full-bridge that is used to measure horizontal direction power; Four foil gauges of another group compensating plate and stiff end are formed a Hui Sideng full-bridge that is used for measuring vertical direction power.
Advantage of the present invention is: because two " well " type holes lay respectively at the two ends of semi-girder, the intrinsic frequency jail of cantilever beam structure obviously wants high.Because the present invention is simple in structure, the elastic body integral rigidity is high, well combines the manufacturing process of sensing, and it is very little to the influence of sensor to conduct oneself with dignity, and each item index all satisfies this testing requirements.
Description of drawings
Fig. 1 is a front view of the present invention;
Fig. 2 is a vertical view of the present invention;
Fig. 3 favour is that this steps on compensating circuit, among the figure:
1,2,3,4 for surveying Y direction stress-strain sheet, and 5,6,7,8 for surveying Z direction stress-strain sheet.
9,10,11 is Y direction force compensating sheet, and 12,13,14 is Z direction force compensating sheet.
R
X1-Rx
4---foil gauge resistance; U---supply voltage; Rm, Rt, Ro are respectively elastic modulus, zero temperature, zero point imbalance compensation sheet.
Below in conjunction with accompanying drawing and embodiment the present invention is done and to further describe:
Embodiment
A kind of high-precision sensor of the present invention comprises elastic body, two parts of foil gauge.Elastomeric material is a duralumin, hard alumin ium alloy.Elastomer structure is made up of the rectangular parallelepiped of both sides and semi-girder, utilizes the stress principle of centrality, and two groups of structural symmetry and cross one another groove are arranged on semi-girder; This groove is formed by " well " type hole and the connection of " mouth " type hole. and as depicted in figs. 1 and 2; The elastic body right-hand member be stiff end, in rectangular parallelepiped lower surface constraint, left end is a loading end; Loading at the rectangular parallelepiped upper surface. " well " type hole front and rear surfaces of semi-girder left end is respectively pasted two foil gauges 1 along center line symmetry respectively; 4 and 2,3 and the compensating plate 9,10,11 that is positioned on the right-hand member rectangular parallelepiped form the Hui Sideng full-bridge together." well " type hole upper and lower surfaces of semi-girder right-hand member along respectively the pasting two and should hand over sheet 5,8 and 6,7 of center line symmetry, is formed the Hui Sideng full-bridge with the compensating plate 12,13,14 that is positioned on the right-hand member rectangular parallelepiped respectively together.When left end rectangular parallelepiped upper surface effect Y direction (horizontal direction) power, through cantilever canal left end " well ' the one group of foil gauge 1,2,3,4 on the type hole can measure the size of Y direction power; When left end rectangular parallelepiped upper surface effect 2 directions (vertical direction) power, can measure the size of z direction power through the one group of foil gauge 5,6,7,8 on " well " type hole of cantilever fine strain of millet right-hand member.
Sensor has been carried out a series of compensation, as shown in Figure 3 in power circuit symmetry insert a kind of temperature-coefficient of electrical resistance on the occasion of resistance R m/2 elastic modulus E is compensated; Rt is the material of the big and temperature of a kind of temperature-coefficient of electrical resistance, and realize the compensation of zero point drift through the Rt that in bridge circuit, inserts certain resistance: Ro is the extremely low material of a kind of temperature-coefficient of electrical resistance, realizes that through the Ro that in bridge circuit, inserts certain resistance zero point is uneven.
The change in resistance of the foil gauge of high-precision sensor becomes the output of change in voltage, adopts foil gauge bridge-type circuit shown in Figure 3.Rx (Rx in the circuit
1-Rx
4) be foil gauge resistance, should hand over the supply voltage Ui of sheet Rx to provide by direct-current switch power supply, Uo is an output terminal.
Claims (1)
1. high-precision sensor; Comprise elastic body, two parts of foil gauge is characterized in that elastomeric material is a duralumin, hard alumin ium alloy; Elastomer structure is made up of the rectangular parallelepiped of both sides and semi-girder; Two " well " type holes lay respectively at the two ends of semi-girder, and two groups of structural symmetry and cross one another groove are arranged on the semi-girder, and sensor has been carried out a series of compensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010527601XA CN102455229A (en) | 2010-11-02 | 2010-11-02 | High-precision sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010527601XA CN102455229A (en) | 2010-11-02 | 2010-11-02 | High-precision sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102455229A true CN102455229A (en) | 2012-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010527601XA Pending CN102455229A (en) | 2010-11-02 | 2010-11-02 | High-precision sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300588A (en) * | 2015-12-01 | 2016-02-03 | 福建省莆田市衡力传感器有限公司 | Special-purpose surface-mounted tension-pressure-torsion sensor |
| CN105953969A (en) * | 2016-06-21 | 2016-09-21 | 南京航空航天大学 | Waist-shaped pipe strain type micro-pressure sensor based on orthotropic composite material |
| CN110608823A (en) * | 2019-06-11 | 2019-12-24 | 蚌埠学院 | Gate lifting weight detection sensor |
| CN110793673A (en) * | 2019-09-21 | 2020-02-14 | 蚌埠市力业传感器有限公司 | Cantilever beam sensor |
| WO2021120387A1 (en) * | 2019-12-20 | 2021-06-24 | 清华大学 | Material dynamic measurement method and axial vibration measurement system |
-
2010
- 2010-11-02 CN CN201010527601XA patent/CN102455229A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105300588A (en) * | 2015-12-01 | 2016-02-03 | 福建省莆田市衡力传感器有限公司 | Special-purpose surface-mounted tension-pressure-torsion sensor |
| CN105953969A (en) * | 2016-06-21 | 2016-09-21 | 南京航空航天大学 | Waist-shaped pipe strain type micro-pressure sensor based on orthotropic composite material |
| CN110608823A (en) * | 2019-06-11 | 2019-12-24 | 蚌埠学院 | Gate lifting weight detection sensor |
| CN110793673A (en) * | 2019-09-21 | 2020-02-14 | 蚌埠市力业传感器有限公司 | Cantilever beam sensor |
| WO2021120387A1 (en) * | 2019-12-20 | 2021-06-24 | 清华大学 | Material dynamic measurement method and axial vibration measurement system |
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| C06 | Publication | ||
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Tang Shujuan Document name: Notification that Application Deemed to be Withdrawn |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120516 |