CN113092001B - Piezoelectric type force transducer calibration device - Google Patents
Piezoelectric type force transducer calibration device Download PDFInfo
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- CN113092001B CN113092001B CN202110477507.6A CN202110477507A CN113092001B CN 113092001 B CN113092001 B CN 113092001B CN 202110477507 A CN202110477507 A CN 202110477507A CN 113092001 B CN113092001 B CN 113092001B
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- steel plate
- displacement meter
- measurement area
- force sensor
- piezoelectric
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a piezoelectric force sensor calibration device which comprises a displacement measurement area, a mechanical measurement area and a piezoelectric measurement area, wherein a middle steel plate of the piezoelectric measurement area is fixed on a lower steel plate through a connecting bolt, a plurality of guide rails of the mechanical measurement area are fixedly connected with the middle steel plate through threads, a belleville spring group is sleeved on the guide rails, the vertical part of an L-shaped part of the displacement measurement area is welded with an upper steel plate, a horizontal part is connected with a displacement meter, a displacement meter fixing rod is fixedly connected with the middle steel plate, one end of a displacement meter clamp is tightly clamped with the displacement meter, the other end of the displacement meter clamp is connected with the displacement meter fixing rod, a piezoelectric force sensor to be calibrated is placed in the piezoelectric measurement area, and the upper part and the lower part of the piezoelectric force sensor are tightly adhered to the middle two steel plates. The method solves the technical problems that a piezoelectric force sensor needs to be specially calibrated by contacting a manufacturer due to signal attenuation and the like, and a large amount of time and traffic cost are needed.
Description
Technical Field
The invention relates to a piezoelectric force sensor calibration device, which belongs to the technical field of measurement instrument calibration devices and is mainly used for correctly calibrating a piezoelectric force sensor under an impact test.
Background
The force sensor is widely applied to the fields of various electronic weighing machines, industrial control, on-line control, safety overload alarm, material testing machines, scientific measurement and the like. Among them, the piezoelectric force sensor is widely applied to various dynamic tests and quasi-static tests due to the characteristic of high frequency response. Force sensors often need to be calibrated in measurement with high precision requirements, and piezoelectric force sensors need to be calibrated specially by contacting manufacturers due to signal attenuation and the like, so that a large amount of time and traffic cost are required.
Disclosure of Invention
The invention provides a piezoelectric force sensor calibration device, aiming at solving the technical problems that the piezoelectric force sensor in the prior art needs to be specially calibrated by contacting a manufacturer due to signal attenuation and the like, and needs a large amount of time and traffic cost.
The invention provides a piezoelectric force sensor calibration device which comprises a displacement measurement area, a mechanical measurement area and a piezoelectric measurement area, wherein the piezoelectric measurement area comprises a lower steel plate, a connecting bolt and a middle steel plate, the middle steel plate is fixed on the lower steel plate through the connecting bolt, the mechanical measurement area comprises a plurality of guide rails, a belleville spring group and an upper steel plate, the guide rails are fixedly connected with the middle steel plate through threads, the belleville spring group is sleeved on the guide rails, the displacement measurement area comprises a displacement meter fixing rod, a displacement meter clamp, a displacement meter and an L-shaped piece, the vertical part of the L-shaped piece is welded with the upper steel plate, the horizontal part of the L-shaped piece is connected with the displacement meter, the displacement meter fixing rod is fixedly connected with the middle steel plate, one end of the displacement meter clamp is tightly fastened with the displacement meter, the other end of the displacement meter clamp is connected with the displacement meter fixing rod, a piezoelectric force sensor to be calibrated is placed in the piezoelectric measurement area, and the piezoelectric force sensor is tightly adhered to the middle steel plate and the upper steel plate and the lower steel plate.
Preferably, the middle steel plate is provided with a guide rail threaded hole, a displacement meter fixing rod threaded hole and a bolt hole, the guide rail is installed in the guide rail threaded hole, the guide rail is fixed on the displacement meter fixing rod threaded hole of the middle steel plate through bottom threads, and the connecting bolt is installed in the bolt hole.
Preferably, the lower steel plate is provided with a bolt threaded hole and a support connecting hole.
Preferably, the displacement meter anchor clamps include two half slot iron sheets and six fastening screws, the half slot iron sheet is opened has two diameters to be less than the notch of displacement meter and displacement meter dead lever respectively, and two half slot iron sheets are fixed through six fastening screws.
Preferably, the belleville spring group is formed by connecting a plurality of belleville spring pairs in series, and the belleville spring pairs comprise two belleville springs with concave surfaces oppositely arranged.
The piezoelectric force sensor calibration device has the beneficial effects that:
the piezoelectric force sensor calibration device provided by the invention can calibrate the piezoelectric force sensor only through common laboratory equipment without factory return calibration, meets the requirements of convenience in calibration and high reliability, and can effectively and conveniently realize the calibration of the piezoelectric force sensor.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
In the drawings:
FIG. 1 is a front view of a piezoelectric force transducer calibration apparatus according to the present invention;
FIG. 2 is a top view of a piezoelectric force transducer calibration apparatus according to the present invention;
FIG. 3 is a schematic view of an upper steel plate;
FIG. 4 is a schematic view of a middle steel plate;
FIG. 5 is a schematic view of a lower steel plate;
FIG. 6 is a schematic view of the clamping state of the displacement gauge clamp;
FIG. 7 is a schematic view of an open state of a displacement gauge clamp;
FIG. 8 is a front view of the displacement gauge clamp;
FIG. 9 is a schematic view of a Belleville spring;
the device comprises a guide rail 1, a guide rail 2, an upper steel plate 2, a guide rail smooth round hole 2, an L-shaped piece 3, a long hole 1, a displacement meter 4, a displacement meter clamp 5, a displacement meter fixing rod 6, a middle steel plate 7, a guide rail threaded hole 7, a displacement meter fixing rod threaded hole 7, a bolt hole 3, a lower steel plate 8, a bolt threaded hole 8, a support connecting hole 8, a butterfly spring group 9 and a connecting bolt 10.
Detailed Description
The following detailed description of embodiments of the invention is provided in conjunction with the accompanying drawings:
the first specific implementation way is as follows: this embodiment is described with reference to fig. 1 to 9. The piezoelectric force sensor calibration device comprises a displacement measurement area, a mechanical measurement area and a piezoelectric measurement area, wherein the piezoelectric measurement area comprises a lower steel plate 8, a connecting bolt 10 and a middle steel plate 7, the middle steel plate 7 is fixed on the lower steel plate 8 through the connecting bolt 10, the mechanical measurement area comprises a plurality of guide rails 1, a belleville spring group 9 and an upper steel plate 2, the guide rails 1 are fixedly connected with the middle steel plate 7 through threads, the belleville spring group 9 is sleeved on the guide rails 1, the displacement measurement area comprises a displacement meter fixing rod 6, a displacement meter clamp 5, a displacement meter 4 and an L-shaped piece 3, the vertical part of the L-shaped piece 3 is welded with the upper steel plate 2, a long hole 3-1 of a horizontal part is connected with the displacement meter 4, the displacement meter fixing rod 6 is fixedly connected with the middle steel plate 7, one end of the displacement meter clamp 5 is tightly connected with the displacement meter 4, one end of the displacement meter fixing rod 6 is connected with the piezoelectric force sensor to be calibrated, and the piezoelectric force sensor to be placed in the piezoelectric measurement area is tightly attached with the middle steel plate.
As shown in fig. 3, the L-shaped member 3 is provided with a long hole 3-1. The thimble part of the displacement meter 4 passes through the long opening 3-1 of the L-shaped part 3 and is fixed by a small screw.
As shown in fig. 3, the upper steel plate 2 is provided with a guide rail smooth circular hole 2-1. Four small steel plates are welded at the centers of four edges of the upper steel plate 2. The small steel plate is used for conveniently connecting the upper steel plate 2 with the L-shaped part 3.
As shown in fig. 4, the middle steel plate 7 is provided with eight guide rail threaded holes 7-1, four connecting bolt holes 7-3 and four displacement meter fixing rod threaded holes 7-2 around the center, the guide rail 1 is installed in the guide rail threaded hole 7-1, the middle steel plate 7 is fixed on the displacement meter fixing rod threaded hole 7-2 of the middle steel plate 7 through bottom threads, and the connecting bolts 10 are installed in the bolt holes 7-3.
As shown in fig. 5, the lower steel plate 8 is provided with bolt threaded holes 8-1 and support connecting holes 8-2, the lower steel plate 8 is provided with four support connecting holes 8-2 connected with the support and four bolt threaded holes 8-1 connected with connecting bolts 10, and the tail of the connecting bolts 10 is provided with threads.
As shown in fig. 6-8, the displacement gauge clamp 6 is composed of two semicircular iron sheets and six fastening screws, wherein the semicircular iron sheets are provided with two notches, the diameters of which are slightly smaller than the displacement gauge 4 and the displacement gauge fixing rod 6 respectively, and the fixing effect is achieved through the six fastening screws.
As shown in fig. 7, the belleville spring group 9 is formed by connecting a plurality of belleville spring pairs in series, and two belleville spring concave surfaces are oppositely arranged between the belleville spring pairs.
The working principle of the piezoelectric force sensor calibration device is as follows:
when the device is used, a force-displacement curve of the belleville spring group 9 is measured by a press machine, the device is placed on an impact test bed, the lower steel plate 8 is firmly fixed with a support, a piezoelectric type force sensor to be calibrated is placed between the middle two steel plates which are tightly attached to a piezoelectric measuring area, the displacement meter 4 and force sensor equipment are fixed and connected, and a displacement time-course curve of the belleville spring group 9 is measured by the impact test, so that a spring group force-time-course curve is obtained by further combining the force-displacement curve of the belleville spring group 9, a result obtained by measuring the deformation of the spring can be obtained by the principle of mutual acting force, and the result is compared with a voltage signal output result of the force sensor and is calibrated.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above-mentioned embodiments are only exemplary of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention can be also reasonably combined with the features described in the above-mentioned embodiments.
Claims (4)
1. The piezoelectric force sensor calibration device is characterized by comprising a displacement measurement area, a mechanical measurement area and a piezoelectric measurement area, wherein the piezoelectric measurement area comprises a lower steel plate (8), a connecting bolt (10) and a middle steel plate (7), the middle steel plate (7) is fixed on the lower steel plate (8) through the connecting bolt (10), the mechanical measurement area comprises a plurality of guide rails (1), a belleville spring set (9) and an upper steel plate (2), the guide rails (1) are fixedly connected with the middle steel plate (7) through threads, the belleville spring set (9) is sleeved on the guide rails (1), the displacement measurement area comprises a displacement meter fixing rod (6), a displacement meter clamp (5), a displacement meter (4) and an L-shaped part (3), the vertical part of the L-shaped part (3) is welded with the upper steel plate (2), a long hole (3-1) of a horizontal part is connected with the displacement meter (4), the displacement meter fixing rod (6) is fixedly connected with the middle steel plate (7), one end of the displacement meter clamp (5) clamps the displacement meter (4), one end of the displacement meter fixing rod (6) is connected with the piezoelectric force sensor calibration area, and the piezoelectric force sensor is tightly attached to the upper and the lower steel plate;
the middle steel plate (7) is provided with a guide rail threaded hole (7-1), a displacement meter fixing rod threaded hole (7-2) and a bolt hole (7-3), the guide rail (1) is installed in the guide rail threaded hole (7-1), the displacement meter fixing rod (6) is fixed on the displacement meter fixing rod threaded hole (7-2) of the middle steel plate (7) through bottom threads, and the connecting bolt (10) is installed in the bolt hole (7-3).
2. The piezoelectric force sensor calibration device according to claim 1, wherein the lower steel plate (8) is provided with bolt threaded holes (8-1) and support connecting holes (8-2).
3. The piezoelectric force sensor calibration device according to claim 1, wherein the displacement meter fixture (5) comprises two semicircular iron sheets and six fastening screws, the semicircular iron sheets are provided with two notches, the diameters of the notches are smaller than those of the displacement meter (4) and the displacement meter fixing rod (6), and the two semicircular iron sheets are fixed by the six fastening screws.
4. The piezoelectric force sensor calibration device according to claim 1, wherein the belleville spring set (9) is formed by connecting a plurality of belleville spring pairs in series, and the belleville spring pairs comprise two belleville springs with concave surfaces facing each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110477507.6A CN113092001B (en) | 2021-04-29 | 2021-04-29 | Piezoelectric type force transducer calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110477507.6A CN113092001B (en) | 2021-04-29 | 2021-04-29 | Piezoelectric type force transducer calibration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113092001A CN113092001A (en) | 2021-07-09 |
| CN113092001B true CN113092001B (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110477507.6A Active CN113092001B (en) | 2021-04-29 | 2021-04-29 | Piezoelectric type force transducer calibration device |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486450B (en) * | 2015-12-10 | 2018-01-12 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of wide-range impulsive force calibrating installation |
| CN106092437B (en) * | 2016-06-06 | 2019-01-22 | 北京航空航天大学 | A kind of small-sized piezoelectric dynamic force sensor caliberating mechanism |
| CN106226152B (en) * | 2016-07-08 | 2018-06-01 | 吉林大学 | Material mechanical property in-situ tests System and method under quiet Dynamic Load Spectrum |
| CN209541987U (en) * | 2018-11-12 | 2019-10-25 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | The caliberating device of piezoelectric pressure indicator |
| CN109443637B (en) * | 2018-11-13 | 2020-07-10 | 浙江大学 | Dynamic response calibration device of resistance strain gauge type pressure measurement system with spring cam structure |
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| CN113092001A (en) | 2021-07-09 |
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