Piezoelectric element sensitivity detection equipment of high-temperature piezoelectric acceleration sensor

Abstract

The invention belongs to the technical field of piezoelectric element detection, and particularly relates to piezoelectric element sensitivity detection equipment of a high-temperature piezoelectric acceleration sensor, which comprises a bedplate, a plurality of groups of detection assemblies are arranged at the top of the bedplate, each detection assembly comprises a sleeve plate and a receiving plate, a sliding block is arranged in each sleeve plate, a main shaft is arranged at one end of each sliding block, and a warping plate is rotationally connected to the main shaft. A light source is fixed to the top of the warping plate, the sliding block is connected with the warping plate through a lifting assembly, and a power supply assembly is arranged on the sleeve plate and used for supplying power to the piezoelectric element. According to the invention, the piezoelectric element vibrates after being electrified, the vibration acts on the sliding block, so that the sliding block moves towards the middle, then the sliding block lifts the warping plate upwards through the lifting assembly, the warping plate warps upwards, and the light source on the warping plate irradiates the position on the receiving plate and moves upwards; therefore, the vibration amplitude of the piezoelectric element can be visually reflected to the position change of the light source on the receiving plate.

Description

Technical Field

[0001] The present invention relates to the technical field of piezoelectric element detection, and in particular to a piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor. Background Art

[0002] The principle of piezoelectric elements is based on the piezoelectric effect, which means that when some dielectrics are deformed by external forces in a certain direction, polarization will occur inside them, and opposite positive and negative charges will appear on their two opposite surfaces. When the external force is removed, it will return to a neutral state. This phenomenon is called the positive piezoelectric effect. When the direction of the force changes, the polarity of the charge also changes.

[0003] Therefore, after the piezoelectric element is produced, it is necessary to test the performance of the piezoelectric element to ensure that the sensitivity of the piezoelectric element meets the standard, thereby ensuring the quality of the piezoelectric element. The existing testing equipment is a high-end precision instrument equipped with various sensing elements, etc., and its cost and maintenance cost are quite high. Therefore, the present application proposes a piezoelectric element sensitivity testing device for a high-temperature piezoelectric acceleration sensor. Summary of the invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor.

[0005] The present invention proposes a piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor, comprising a table, a plurality of groups of longitudinally distributed detection components are arranged on the top of the table, the detection components include a sleeve plate and a receiving plate arranged on the top of the table, the sleeve plate is fixedly connected to the table, a slider capable of laterally moving and elastically connected to the sleeve plate is arranged in the sleeve, a main shaft fixed to the inner side wall of the sleeve is arranged at one end of the slider close to the receiving plate, a seesaw is rotatably connected to the main shaft, a light source capable of irradiating the receiving plate is fixed to the top of the seesaw, the slider is connected to the seesaw through a lifting component, and a power supply component is arranged on the sleeve The power supply component is used to supply power to the piezoelectric element. The piezoelectric element is placed between the sleeve plate and the slider. The end of the slider is just against the piezoelectric element. The piezoelectric element is then energized through the power supply component. The piezoelectric element vibrates after being energized. The vibration acts on the slider, causing the slider to move toward the middle. The slider then lifts the seesaw upward through the lifting component, causing it to rotate around the main axis. The seesaw will tilt upward, and the position of the light source on the seesaw that shines on the receiving plate will move upward. In this way, the vibration amplitude of the piezoelectric element can be intuitively reflected to the change in the position of the light source on the receiving plate, thereby achieving the effect of sensitivity detection of the piezoelectric element.

[0006] Preferably, an ear seat is fixed to the inner wall of the sleeve plate, a guide rod is inserted into the ear seat, the other end of the guide rod is fixedly connected to the slider, a spring is sleeved on the guide rod, and the two ends of the spring are respectively fixedly connected to the slider and the ear seat, so that the slider can be driven to reset and move by the spring, and the deformation of the spring can be constrained by the guide rod and the ear seat so that it will not bend or deform.

[0007] Preferably, the power supply assembly includes a terminal socket fixed to the outer end of the sleeve plate, and a voltage converter electrically connected to the terminal socket is fixed to the bottom of the table plate. The wires on the piezoelectric element are connected to the terminal socket, and the household rated voltage is converted into a suitable voltage for the piezoelectric element through the voltage converter, and then the piezoelectric element can be energized.

[0008] Preferably, the lifting assembly includes a toothed plate, a gear and a cam capable of contacting the seesaw. The toothed plate is fixed to the inner end of the slider, the gear is meshingly connected to the top of the toothed plate, the gear is rotatably connected to the sleeve plate through a shaft column, and the cam is fixedly sleeved on the shaft column. When the slider moves, it synchronously drives the toothed plate to move, the toothed plate meshes and drives the gear to rotate around the shaft column, the shaft column will drive the cam to rotate, and the cam will lift the seesaw upward.

[0009] Preferably, the lifting assembly includes a pressure block, which is fixed at the inner end of the slider. The bottom of the slider is provided with an inclined surface that can press on the end of the seesaw. When the slider moves, it synchronously drives the pressure block to a certain extent. The pressure block will squeeze one end of the seesaw through the inclined surface, and the seesaw will tilt upward.

[0010] Preferably, the lifting assembly includes a connecting rod, and the first ear block and the second ear block are rotatably connected at both ends of the connecting rod, and the first ear block and the second ear block are fixedly connected to the slider and the seesaw respectively. When the slider moves, the seesaw will be pushed through the connecting rod, and the seesaw will tilt upward.

[0011] Preferably, the lifting assembly includes a gear bar, a first rack and a second rack, the second rack being fixed to the inner end of the slider, the gear bar being rotatably connected to the sleeve plate through a shaft rod, the gear bar being meshingly connected to the top of the second rack, the first rack being located below the rocker and meshingly connected to the gear bar, one end of the first rack being in contact with the inner side wall of the sleeve plate, a guide column being fixed to the bottom of the first rack, an ear plate being sleeved on the guide column, and the ear plate being fixed to the inner side wall of the sleeve plate, when the slider moves, the second rack is synchronously driven to move, the second rack meshes and drives the gear bar to rotate, and under the limiting action of the guide column and the ear plate, the gear bar will mesh and drive the first rack to move upward, and the first rack will lift the rocker upward.

[0012] Preferably, a plurality of longitudinally distributed guide frames are fixed on the top of the table plate, a guide block is slidably connected inside the guide frame, a receiving plate is fixed on the top of the guide block, a sliding column passing through the guide frame is fixed on the outer end of the guide block, the outer ends of the plurality of sliding columns are fixed with the same pull plate, a fixed plate is fixed on the inner side of the pull plate, the end of the fixed plate is threadedly connected with a bolt, when the position change of the light source on the receiving plate is not obvious, it is only necessary to pull the sliding column by the pull plate, the sliding column will drive the guide block and the receiving plate to move to the right, so that the distance between the receiving plate and the main shaft will increase, so that under the same vibration amplitude, the position change of the light source on the receiving plate will be more obvious.

[0013] Preferably, a window is installed on the front of the receiving plate, and a slot is opened on the top of the receiving plate. A fluorescent plate located directly behind the window is inserted into the slot, so that the light source can directly shine on the fluorescent plate, leaving a temporary mark on the fluorescent plate, so that the staff can know more clearly the highest position illuminated by the light source.

[0014] Preferably, a pair of L-shaped positioning parts are provided on the inner wall of one end of the sleeve plate away from the receiving plate, and a pressure plate is arranged between the two positioning parts. A push rod passing through the sleeve plate is fixed to the back of the pressure plate, and the ends of multiple push rods are fixed to the same push plate. Multiple push rod motors are fixed to the top of the table plate, and the output shaft of the push rod motor is connected to the push plate. A magnet is embedded in the end of the slider close to the pressure plate. In this way, the piezoelectric element can be placed between the two positioning parts, and then the push rod motor is started. The output shaft of the push rod motor contracts and then drives the push plate, push rod and pressure plate to move. The pressure plate will squeeze the piezoelectric element onto the positioning part, so that the charge in the piezoelectric element will move and then generate current, and an electromagnetic field will be generated around the current. The electromagnetic field reacts with the magnetic field around the magnet, which will cause the slider to move inward, so that the current change of the piezoelectric element is intuitively reflected to the position change of the light source on the receiving plate, thereby achieving reverse detection.

[0015] Compared with the prior art, the present invention provides a piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor, which has the following beneficial effects:

[0016] 1. A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor. By setting a light source and a receiving plate, the piezoelectric element vibrates after being energized, and the vibration acts on the slider, causing the slider to move toward the middle. The slider then lifts the seesaw upward through a lifting assembly, causing it to rotate around the main axis. The seesaw will tilt upward, and the position of the light source on the seesaw that shines on the receiving plate will move upward. In this way, the vibration amplitude of the piezoelectric element can be intuitively reflected to the change in the position of the light source on the receiving plate, thereby achieving the effect of sensitivity detection of the piezoelectric element.

[0017] 2. A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor can lift the seesaw upward by setting four lifting components.

[0018] 3. A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor, which sets a movable receiving plate. When the position change of the light source on the receiving plate is not obvious, it is only necessary to pull the sliding column through the pull plate, and the sliding column will drive the guide block and the receiving plate to move to the right, so that the distance between the receiving plate and the main shaft will increase. In this way, under the same vibration amplitude, the position change of the light source on the receiving plate will be more obvious.

[0019] 4. A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor. By setting a fluorescent plate, the light source can be directly irradiated on the fluorescent plate, and a temporary mark will be left on the fluorescent plate, so that the staff can know more clearly the highest position irradiated by the light source.

[0020] 5. A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor. By setting a magnet, when the piezoelectric element is squeezed, the charge in the piezoelectric element will move and generate current, and an electromagnetic field will be generated around the current. The electromagnetic field reacts with the magnetic field around the magnet, causing the slider to move inward. In this way, the current change of the piezoelectric element is directly reflected to the position change of the light source on the receiving plate, thereby achieving reverse detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor proposed by the present invention;

[0022] Figure 2 A schematic diagram of the bottom structure of a piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor proposed by the present invention;

[0023] Figure 3 A schematic diagram of a pressure plate installation structure of a piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the installation structure of a lifting assembly of a piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor proposed in Example 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of the installation structure of a lifting assembly of a piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor proposed in Example 2 of the present invention;

[0026] Figure 6This is a schematic diagram of the installation structure of a lifting assembly of a piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor proposed in Example 3 of the present invention;

[0027] Figure 7 This is a schematic diagram of the installation structure of a lifting assembly of a piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor proposed in Example 4 of the present invention;

[0028] Figure 8 A schematic diagram of a magnet installation structure of a piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor proposed by the present invention;

[0029] Fig. 9 This is a schematic diagram of the fluorescent plate installation structure of a piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor proposed by the present invention.

[0030] In the figure: 1, table; 2, sleeve plate; 3, slider; 4, spindle; 5, seesaw; 6, light source; 7, receiving plate; 8, voltage converter; 9, terminal block; 10, ear seat; 11, guide rod; 12, spring; 13, shaft column; 14, gear; 15, cam; 16, tooth plate; 17, pressure block; 18, inclined surface; 19, first ear block; 20, second ear block; 21, connecting rod; 22, shaft rod; 23, gear bar; 24, first rack; 25, second rack; 26, guide column; 27, ear plate; 28, guide frame; 29, guide block; 30, sliding column; 31, pull plate; 32, fixing plate; 33, bolt; 34, positioning part; 35, pressure plate; 36, push rod; 37, push plate; 38, push rod motor; 39, magnet; 40, window; 41, slot; 42, fluorescent plate. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Reference Figure 1-9A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor includes a platform 1, a plurality of groups of longitudinally distributed detection components are arranged on the top of the platform 1, the detection components include a sleeve plate 2 and a receiving plate 7 arranged on the top of the platform 1, the sleeve plate 2 is fixedly connected to the platform 1, a slider 3 that can move laterally and is elastically connected to the sleeve plate 2 is arranged in the sleeve plate 2, a main shaft 4 fixed to the inner wall of the sleeve plate 2 is arranged at one end of the slider 3 close to the receiving plate 7, a seesaw 5 is rotatably connected to the main shaft 4, a light source 6 that can irradiate the receiving plate 7 is fixed on the top of the seesaw 5, the slider 3 is connected to the seesaw 5 through a lifting component, and a power supply component is arranged on the sleeve plate 2 The power supply component is used to supply power to the piezoelectric element. The piezoelectric element is placed between the sleeve plate 2 and the slider 3. The end of the slider 3 is just against the piezoelectric element. Then the piezoelectric element is energized through the power supply component. The piezoelectric element vibrates after being energized. The vibration acts on the slider 3, causing the slider 3 to move toward the middle. Then the slider 3 lifts the seesaw 5 upward through the lifting component to rotate it around the main axis 4. The seesaw 5 will tilt upward, and the position of the light source 6 on the seesaw 5 that illuminates the receiving plate 7 will move upward. In this way, the vibration amplitude of the piezoelectric element can be intuitively reflected to the position change of the light source 6 on the receiving plate 7, thereby achieving the effect of sensitivity detection of the piezoelectric element.

[0034] Among them, an ear seat 10 is fixed to the inner wall of the sleeve plate 2, a guide rod 11 is inserted into the ear seat 10, the other end of the guide rod 11 is fixedly connected to the slider 3, a spring 12 is sleeved on the guide rod 11, and the two ends of the spring 12 are respectively fixedly connected to the slider 3 and the ear seat 10, so that the slider 3 can be driven to reset and move by the spring 12, and the deformation of the spring 12 can be constrained by the guide rod 11 and the ear seat 10, so that it will not bend and deform.

[0035] Among them, the power supply component includes a terminal socket 9 fixed at the outer end of the sleeve plate 2, and a voltage converter 8 electrically connected to the terminal socket 9 is fixed at the bottom of the table 1. The wires on the piezoelectric element are connected to the terminal socket 9, and the household rated voltage is converted into a suitable voltage for the piezoelectric element through the voltage converter 8, and then the piezoelectric element can be energized.

[0036] In Example 1, the lifting assembly includes a toothed plate 16, a gear 14 and a cam 15 capable of contacting the seesaw 5. The toothed plate 16 is fixed to the inner end of the slider 3, and the gear 14 is meshed and connected above the toothed plate 16. The gear 14 is rotatably connected to the sleeve plate 2 through the shaft column 13. The cam 15 is fixedly sleeved on the shaft column 13. When the slider 3 moves, the toothed plate 16 is synchronously driven to move. The toothed plate 16 meshes and drives the gear 14 to rotate around the shaft column 13. The shaft column 13 will drive the cam 15 to rotate, and the cam 15 will lift the seesaw 5 upward.

[0037] In Example 2, the lifting assembly includes a pressure block 17, which is fixed to the inner end of the slider 3. The bottom of the slider 3 is provided with an inclined surface 18 that can press on the end of the seesaw 5. When the slider 3 moves, it synchronously drives the pressure block 17 to a certain extent. The pressure block 17 will squeeze one end of the seesaw 5 through the inclined surface 18, and the seesaw 5 will tilt upward.

[0038] In Example 3, the lifting assembly includes a connecting rod 21, and the two ends of the connecting rod 21 are rotatably connected to the first ear block 19 and the second ear block 20, respectively. The first ear block 19 and the second ear block 20 are fixedly connected to the slider 3 and the rocker 5, respectively. When the slider 3 moves, it will push the rocker 5 through the connecting rod 21, and the rocker 5 will tilt upward.

[0039] In Example 4, the lifting assembly includes a gear bar 23, a first rack 24 and a second rack 25. The second rack 25 is fixed to the inner end of the slider 3. The gear bar 23 is rotatably connected to the sleeve plate 2 through the shaft 22. The gear bar 23 is meshed and connected to the top of the second rack 25. The first rack 24 is located below the rocker 5 and is meshed and connected to the gear bar 23. One end of the first rack 24 is in contact with the inner wall of the sleeve plate 2. A guide column 26 is fixed to the bottom of the first rack 24. An ear plate 27 is sleeved on the guide column 26. The ear plate 27 is fixed to the inner wall of the sleeve plate 2. When the slider 3 moves, it simultaneously drives the second rack 25 to move. The second rack 25 meshes and drives the gear bar 23 to rotate. Under the limiting action of the guide column 26 and the ear plate 27, the gear bar 23 will mesh and drive the first rack 24 to move upward, and the first rack 24 will lift the rocker 5 upward.

[0040] Furthermore, a plurality of longitudinally distributed guide frames 28 are fixed on the top of the table 1, a guide block 29 is slidably connected inside the guide frame 28, the receiving plate 7 is fixed on the top of the guide block 29, a sliding column 30 passing through the guide frame 28 is fixed on the outer end of the guide block 29, a same pull plate 31 is fixed to the outer ends of the plurality of sliding columns 30, a fixing plate 32 is fixed on the inner side of the pulling plate 31, a bolt 33 is threadedly connected to the end of the fixing plate 32, when the position change of the light source 6 irradiated on the receiving plate 7 is not obvious, it is only necessary to pull the sliding column 30 by the pulling plate 31, the sliding column 30 will drive the guide block 29 and the receiving plate 7 to move to the right, so that the distance between the receiving plate 7 and the main shaft 4 will increase, so that under the same vibration amplitude, the position change of the light source 6 irradiated on the receiving plate 7 will be more obvious.

[0041] Furthermore, a window 40 is installed on the front of the receiving plate 7, and a slot 41 is opened at the top of the receiving plate 7. A fluorescent plate 42 located directly behind the window 40 is inserted into the slot 41, so that the light source 6 can directly shine on the fluorescent plate 42, and a temporary mark will be left on the fluorescent plate 42, so that the staff can know more clearly the highest position illuminated by the light source 6.

[0042] Furthermore, a pair of L-shaped positioning parts 34 are provided on the inner wall of one end of the sleeve plate 2 away from the receiving plate 7, a pressing plate 35 is provided between the two positioning parts 34, a push rod 36 passing through the sleeve plate 2 is fixed on the back of the pressing plate 35, and the ends of the plurality of push rods 36 are fixed with the same push plate 37, a plurality of push rod motors 38 are fixed on the top of the table 1, and the output shafts of the push rod motors 38 are connected to the push plate 37, and a magnet 39 is embedded at one end of the slider 3 close to the pressing plate 35, so that the piezoelectric element can be placed between the two positioning parts 34, and then Start the push rod motor 38, the output shaft of the push rod motor 38 contracts and then drives the push plate 37, the push rod 36 and the pressure plate 35 to move, and the pressure plate 35 will squeeze the piezoelectric element onto the positioning part 34, so that the charge in the piezoelectric element will move and then generate current, and an electromagnetic field will be generated around the current. The electromagnetic field reacts with the magnetic field around the magnet 39, which will cause the slider 3 to move inward, and the current change of the piezoelectric element will be directly reflected in the position change of the light source 6 on the receiving plate 7, thereby achieving reverse detection.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor, comprising a platform (1), characterized in that: A plurality of groups of longitudinally distributed detection components are arranged on the top of the platform (1), and the detection components include a sleeve plate (2) and a receiving plate (7) arranged on the top of the platform (1). The sleeve plate (2) is fixedly connected to the platform (1), and a slider (3) capable of laterally moving and elastically connected to the sleeve plate (2) is arranged in the sleeve plate (2). A main shaft (4) fixed to the inner wall of the sleeve plate (2) is arranged at one end of the slider (3) close to the receiving plate (7), and a seesaw (5) is rotatably connected to the main shaft (4). A light source (6) capable of irradiating the receiving plate (7) is fixed on the top of the seesaw (5), and the slider (3) is connected to the seesaw (5) via a lifting component. A power supply component is arranged on the sleeve plate (2); The power supply component is used to supply power to the piezoelectric element; The lifting assembly is used to lift the seesaw (5) upwards so that it rotates around the main axis (4).

2. The piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor according to claim 1, characterized in that: An ear seat (10) is fixed to the inner side wall of the sleeve plate (2), a guide rod (11) is inserted into the ear seat (10), the other end of the guide rod (11) is fixedly connected to the slider (3), a spring (12) is sleeved on the guide rod (11), and the two ends of the spring (12) are respectively fixedly connected to the slider (3) and the ear seat (10).

3. The piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor according to claim 1, characterized in that: The power supply assembly comprises a wiring socket (9) fixed at the outer end of the sleeve plate (2), and a voltage converter (8) electrically connected to the wiring socket (9) is fixed at the bottom of the table plate (1).

4. The piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor according to claim 1, characterized in that: The lifting assembly comprises a toothed plate (16), a gear (14) and a cam (15) capable of contacting the seesaw (5); the toothed plate (16) is fixed to the inner end of the slider (3); the gear (14) is meshingly connected to the top of the toothed plate (16); the gear (14) is rotatably connected to the sleeve plate (2) via a shaft column (13); and the cam (15) is fixedly sleeved on the shaft column (13).

5. The piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor according to claim 1, characterized in that: The lifting assembly comprises a pressing block (17), which is fixed to the inner end of the slider (3). The bottom of the slider (3) is provided with an inclined surface (18) capable of pressing on the end of the rocker (5).

6. The piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor according to claim 1, characterized in that: The lifting assembly comprises a connecting rod (21), and the two ends of the connecting rod (21) are rotatably connected to a first ear block (19) and a second ear block (20), and the first ear block (19) and the second ear block (20) are fixedly connected to the slider (3) and the seesaw (5) respectively.

7. The piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor according to claim 1, characterized in that: The lifting assembly comprises a gear bar (23), a first rack (24) and a second rack (25), wherein the second rack (25) is fixed to the inner end of the slider (3), the gear bar (23) is rotatably connected to the sleeve plate (2) via a shaft (22), the gear bar (23) is meshingly connected to the upper part of the second rack (25), the first rack (24) is located below the seesaw (5) and is meshingly connected to the gear bar (23), one end of the first rack (24) is in contact with the inner wall of the sleeve plate (2), a guide column (26) is fixed to the bottom of the first rack (24), an ear plate (27) is sleeved on the guide column (26), and the ear plate (27) is fixed to the inner wall of the sleeve plate (2).

8. A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor according to any one of claims 4 to 7, characterized in that: A plurality of longitudinally distributed guide frames (28) are fixed on the top of the platform (1), a guide block (29) is slidably connected inside the guide frame (28), a receiving plate (7) is fixed on the top of the guide block (29), a sliding column (30) passing through the guide frame (28) is fixed on the outer end of the guide block (29), a same pull plate (31) is fixed on the outer ends of the plurality of sliding columns (30), a fixing plate (32) is fixed on the inner side of the pulling plate (31), and a bolt (33) is threadedly connected to the end of the fixing plate (32).

9. A piezoelectric element sensitivity detection device for a high-temperature piezoelectric acceleration sensor according to any one of claims 4 to 7, characterized in that: A viewing window (40) is installed on the front of the receiving plate (7), a slot (41) is provided at the top of the receiving plate (7), and a fluorescent plate (42) located directly behind the viewing window (40) is inserted into the slot (41).

10. The piezoelectric element sensitivity detection device of a high-temperature piezoelectric acceleration sensor according to claim 1, characterized in that: A pair of L-shaped positioning parts (34) are provided on the inner wall of one end of the sleeve plate (2) away from the receiving plate (7), a pressure plate (35) is provided between the two positioning parts (34), a push rod (36) passing through the sleeve plate (2) is fixed on the back of the pressure plate (35), and the ends of multiple push rods (36) are fixed with the same push plate (37), multiple push rod motors (38) are fixed on the top of the table (1), the output shaft of the push rod motor (38) is connected to the push plate (37), and a magnet (39) is embedded in the end of the slider (3) close to the pressure plate (35).

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