An air-thrown impact calibration device for an acceleration sensor

Abstract

The present invention relates to the field of acceleration sensor calibration, in particular to a gas-blast impact calibration device for an acceleration sensor, comprising an impact mechanism, which includes an impact cylinder, an impact assembly is arranged on the impact cylinder, a mounting block is arranged at the top of the impact cylinder, and a acceleration sensor to be tested and a reference acceleration sensor are mounted on the top of the mounting block through two fixing members; a deceleration mechanism, which includes a limiting frame mounted on the top of the impact cylinder, a friction pad is arranged on one side of the mounting block, a mounting groove is arranged on the mounting block, a driving assembly and a sliding assembly are arranged inside the mounting groove, the driving assembly is used to drive the sliding assembly, so that the sliding assembly drives the friction pad to fit against the side surface of the limiting frame. Through the deceleration mechanism, the descending speed of the mounting block and the two acceleration sensors thereon is greatly reduced, the impact force caused by their descent is reduced, and the problem of damage to the acceleration sensor and the buffer pad caused by the descending impact force is avoided.

Description

Technical Field

[0001] The present invention relates to the field of acceleration sensor calibration, and in particular to a gas-thrown impact calibration device for an acceleration sensor. Background Art

[0002] An acceleration sensor is an electronic device used to measure the acceleration of an object, capable of detecting static (such as gravity) or dynamic (such as vibration, impact) acceleration. Its core principle is based on Newton's second law (Force = mass × acceleration), and the acceleration is converted into an electrical signal output through internal sensitive elements (such as piezoelectric materials, microelectromechanical systems MEMS). It is widely used in consumer electronics (such as mobile phone screen rotation), automobiles (such as airbag triggering), industrial equipment (such as vibration monitoring), aerospace (such as aircraft attitude control), and other fields.

[0003] Since the measurement accuracy of the acceleration sensor is directly related to the safety and reliability of the device, an acceleration sensor needs to be calibrated using a gas-thrown impact calibration device during the production process. By providing a high-precision acceleration simulation environment through the gas-thrown impact calibration device, the accuracy of the sensor in actual applications is ensured.

[0004] In the prior art, when the gas-thrown impact calibration device impacts the carrier on which the acceleration sensor is installed, it will drive the acceleration sensor to rise. However, when the acceleration sensor descends, although a buffer is provided at the top of the gas-thrown impact calibration device, most of the buffers are buffer pads or springs, which can form a certain buffer. However, when the height at which the acceleration sensor is located after being impacted is relatively high, the acceleration sensor will generate a large impact force on the buffer during the descending process, and it is very likely to damage the acceleration sensor and the buffer.

[0005] Therefore, a gas-thrown impact calibration device for an acceleration sensor is proposed. Summary of the Invention

[0006] In view of the problem in the above or the prior art that although a buffer is provided at the top of the gas-thrown impact calibration device, most of the buffers are buffer pads or springs, which can form a certain buffer, but when the height at which the acceleration sensor is located after being impacted is relatively high, the acceleration sensor will generate a large impact force on the buffer during the descending process, and it is very likely to damage the acceleration sensor and the buffer, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide a gas-thrown impact calibration device for an acceleration sensor.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: including,

[0009] An impact mechanism, which includes an impact cylinder, an impact component is arranged on the impact cylinder, an installation block is arranged at the top of the impact cylinder, and an acceleration sensor to be tested and a reference acceleration sensor are installed on the top of the installation block through two fixing pieces;

[0010] A deceleration mechanism, which includes a limit frame installed at the top of the impact cylinder, a friction pad is arranged on one side of the installation block, an installation groove is arranged on the installation block, a driving component and a sliding component are arranged inside the installation groove, and the driving component is used to drive the sliding component so that the sliding component drives the friction pad to fit against the side surface of the limit frame.

[0011] As a preferred solution of the air-thrown impact type calibration device for the acceleration sensor of the present invention, wherein: the impact component includes an air cylinder installed on the impact cylinder, a trachea is connected to the air cylinder, and one end of the trachea far from the air cylinder extends from the bottom of the impact cylinder to the inside of the impact cylinder and is communicated with the inside of the impact cylinder. A projectile is arranged inside the impact cylinder, the projectile is located at the top of the end of the trachea far from the air cylinder, a column is arranged at the bottom of the installation block, and one end of the column far from the installation block extends into the inside of the impact cylinder;

[0012] An exhaust port is opened on the side wall of the impact cylinder, and the exhaust port is located between the column and the projectile.

[0013] As a preferred solution of the air-thrown impact type calibration device for the acceleration sensor of the present invention, wherein: two magnets are arranged inside the air cylinder, the two magnets have the same poles, and the two magnets are respectively located at one ends of the projectile and the column close to each other.

[0014] As a preferred solution of the air-thrown impact type calibration device for the acceleration sensor of the present invention, wherein: a buffer pad is arranged at the top of the impact cylinder.

[0015] As a preferred solution of the air-thrown impact type calibration device for the acceleration sensor of the present invention, wherein: there is a certain gap between the projectile and the inner wall of the impact cylinder, and the gap is small.

[0016] As a preferred solution of the air-thrown impact type calibration device for the acceleration sensor of the present invention, wherein: the driving component includes a first vertical plate arranged inside the installation groove, one end of the first vertical plate far from the impact cylinder passes through the installation groove and is connected with a positioning plate, a driving block is connected to the side of the first vertical plate close to the friction pad, and a first inclined surface and a first flat surface are arranged on the driving block.

[0017] As a preferred solution of the air-thrown impact type calibration device for the acceleration sensor of the present invention, wherein: the driving component further includes a sliding groove opened on the installation block, the sliding groove is communicated with the installation groove, a slider is arranged inside the sliding groove, and one side of the slider is connected with the first vertical plate.

[0018] As a preferred embodiment of the air-throwing impact calibration device for the acceleration sensor of the present invention, wherein: the sliding assembly includes a horizontal plate detachably connected to the friction pad, a second vertical plate is connected to the top of the horizontal plate, a telescopic rod and a spring are connected to the side of the second vertical plate away from the first vertical plate, the spring is sleeved on the surface of the telescopic rod, and one ends of the telescopic rod and the spring away from the second vertical plate are both connected to the inner wall of the installation groove.

[0019] As a preferred embodiment of the air-throwing impact calibration device for the acceleration sensor of the present invention, wherein: the sliding assembly further includes a force-receiving block disposed on the side of the second vertical plate close to the first vertical plate, and a second inclined surface and a second flat surface are provided on the force-receiving block;

[0020] The second inclined surface corresponds to the first inclined surface.

[0021] As a preferred embodiment of the air-throwing impact calibration device for the acceleration sensor of the present invention, wherein: the elastic force of the spring is greater than the sum of the gravity of the slider, the gravity of the first vertical plate, and the gravity of the driving block.

[0022] The beneficial effects of the air-throwing impact calibration device for the acceleration sensor of the present invention: The impact assembly can drive the mounting block to rise, and then drive the acceleration sensor to be tested and the reference acceleration sensor on the top of the mounting block to rise, so that the two acceleration sensors measure the acceleration, and by comparing the data measured on the acceleration sensor to be tested and the reference acceleration sensor, the accuracy of the measurement result of the acceleration sensor to be tested is judged. When the mounting block moves to a suitable height, the driving assembly is triggered, so that the driving assembly drives the sliding assembly to operate, and the sliding assembly drives the friction pad to fit against the side surface of the limiting frame. When the mounting block and the two acceleration sensors thereon descend under the action of gravity, under the action of the friction force between the friction pad and the limiting frame, the descending speed of the mounting block and the two acceleration sensors thereon is greatly reduced, and the impact force caused by their descent is reduced, avoiding the problem of damage to the acceleration sensor and the buffer pad due to the descending impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the overall structure of the air-throwing impact calibration device for the acceleration sensor;

[0025] Figure 2Partial sectional structure schematic diagram of the overall air-thrown impact calibration device for an acceleration sensor;

[0026] Figure 3 Sectional structure schematic diagram of the mounting block of the air-thrown impact calibration device for an acceleration sensor;

[0027] Figure 4 Schematic diagram of the drive assembly structure of the air-thrown impact calibration device for an acceleration sensor;

[0028] Figure 5 Schematic diagram of the sliding assembly structure of the air-thrown impact calibration device for an acceleration sensor;

[0029] In the figure: 1. Impact mechanism; 11. Impact cylinder; 111. Exhaust port; 112. Buffer pad; 113. Gap; 12. Impact assembly; 121. Air cylinder; 1211. Magnet; 122. Air pipe; 123. Projectile; 124. Column; 13. Mounting block;

[0030] 2. Deceleration mechanism; 21. Limiting frame; 22. Friction pad; 23. Installation groove; 24. Drive assembly; 241. First vertical plate; 242. Positioning plate; 243. Drive block; 244. First inclined plane; 245. First plane; 246. Slide groove; 247. Slide block; 25. Sliding assembly; 251. Horizontal plate; 252. Second vertical plate; 253. Telescopic rod; 254. Spring; 255. Force-receiving block; 256. Second inclined plane; 257. Second plane. Specific implementation mode

[0031] To make the above objects, features, and advantages of the present invention more obvious and understandable, the specific implementation mode of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0032] Example 1, referring to Figures 1 to 5 , which is the first embodiment of the present invention. This embodiment provides an air-thrown impact calibration device for an acceleration sensor, which can achieve the effect of testing the acceleration sensor. It includes an impact mechanism 1, which includes an impact cylinder 11. An impact assembly 12 is arranged on the impact cylinder 11. A mounting block 13 is arranged at the top of the impact cylinder 11. An acceleration sensor to be tested and a reference acceleration sensor are installed on the top of the mounting block 13 through two fixing members. A deceleration mechanism 2 is installed on the mounting block 13. The deceleration mechanism 2 can be one or two, preferably two. The deceleration mechanism 2 includes a limiting frame 21 installed at the top of the impact cylinder 11. A friction pad 22 is arranged on one side of the mounting block 13. An installation groove 23 is arranged on the mounting block 13. A drive assembly 24 and a sliding assembly 25 are arranged inside the installation groove 23. The drive assembly 24 is used to drive the sliding assembly 25 so that the sliding assembly 25 drives the friction pad 22 to fit against the side surface of the limiting frame 21;

[0033] Among them, the acceleration sensor and the two fixing parts are not shown in the attached drawings of the specification. Specifically, the corresponding fixing parts can be installed on the top of the mounting block 13 according to the size of the acceleration sensor in actual production;

[0034] Among them, the fixing part is a conventional device that can fix acceleration sensors of different sizes, such as an electric control jaw, etc. The accuracy of the measurement result of the acceleration sensor to be tested is judged by comparing the data measured on the acceleration sensor to be tested and the reference acceleration sensor;

[0035] Among them, the limiting frame 21 is concave. The limiting frame 21 can limit the mounting block 13, so that the mounting block 13 can only move up and down in a straight line position. Furthermore, it ensures that the acceleration sensor to be tested and the reference acceleration sensor can only move up and down in a straight line, increasing the accuracy of the test. At the same time, the limiting frame 21 is an adjustable limiting frame 21, so that the height of the limiting frame 21 can be adjusted according to the magnitude of the air pressure, making the limiting frame 21 applicable to the detection of various accelerations;

[0036] The impact component 12 can drive the mounting block 13 to rise, and then drive the acceleration sensor to be tested and the reference acceleration sensor on the top of the mounting block 13 to rise, so that the two acceleration sensors measure the acceleration. By comparing the data measured on the acceleration sensor to be tested and the reference acceleration sensor, the accuracy of the measurement result of the acceleration sensor to be tested is judged. When the mounting block 13 moves to an appropriate height, the driving component 24 is triggered, so that the driving component 24 drives the sliding component 25 to operate. The sliding component 25 drives the friction pad 22 to fit with the side surface of the limiting frame 21. When the mounting block 13 and the two acceleration sensors thereon descend under the action of gravity, under the action of the friction force between the friction pad 22 and the limiting frame 21, their descending speed is greatly reduced, and the impact force caused by their descent is reduced, avoiding the problem of damage to the acceleration sensor and the buffer pad 112 due to the descending impact force.

[0037] Furthermore, the impact component 12 includes an air cylinder 121 installed on the impact cylinder 11. The air cylinder 121 can be located at the bottom of the impact cylinder 11 or on the side of the impact cylinder 11, and is specifically selected according to the convenience of use. An air pipe 122 is connected to the air cylinder 121. One end of the air pipe 122 far from the air cylinder 121 extends from the bottom of the impact cylinder 11 to the inside of the impact cylinder 11 and is communicated with the inside of the impact cylinder 11. A projectile 123 is arranged inside the impact cylinder 11. The projectile 123 is located at the top of one end of the air pipe 122 far from the air cylinder 121. A column 124 is arranged at the bottom of the mounting block 13. One end of the column 124 far from the mounting block 13 extends into the inside of the impact cylinder 11. An exhaust port 111 is opened on the side wall of the impact cylinder 11. The exhaust port 111 is located between the column 124 and the projectile 123;

[0038] Among them, a valve is provided on the air cylinder 121. When the valve is opened, the air cylinder 121 can eject high-pressure gas, and the rest can be adjusted. It is a very mature existing device;

[0039] Among them, the projectile 123 corresponds to the barrel part of the impact cylinder 11, and the projectile 123 only needs to be able to move linearly up and down inside the impact cylinder 11.

[0040] Furthermore, two magnets 1211 are arranged inside the air cylinder 121. The two magnets 1211 have the same polarity, and the two magnets 1211 are respectively located at one end where the projectile 123 and the column 124 are close to each other. When the projectile 123 rises, the magnet 1211 on it drives the magnet 1211 on the projectile 123 closer to the magnet 1211 of the column 124. Using the principle of repulsion between like-pole magnets 1211, the projectile 123 will not directly impact the column 124, avoiding the problem of damage to the column 124 and the projectile 123;

[0041] Among them, the magnet 1211 is detachably connected to both the projectile 123 and the column 124. The installation method can use stainless steel bolts. When the magnetism of the magnet 1211 is very weak after long-term use, it can be removed and replaced. Although the magnetism will weaken over time, as long as it can be ensured that when the high-pressure gas impacts the projectile 123 and causes the projectile 123 to rise, the repulsive force between the two like-pole magnets 1211 can ensure that the two like-pole magnets 1211 do not fit together.

[0042] Furthermore, a buffer pad 112 is provided at the top of the impact cylinder 11. The buffer pad 112 is used to form a buffer for the mounting block 13 and the two acceleration sensors on it when the mounting block 13 and the two acceleration sensors on it descend under the action of gravity, protecting the mounting block 13 and the two acceleration sensors on it and avoiding damage to the mounting block 13 and the two acceleration sensors on it.

[0043] Furthermore, there is a certain gap 113 between the projectile 123 and the inner wall of the impact cylinder 11, and the gap 113 is relatively small;

[0044] Among them, the gap 113 is used for the discharge of gas. When the projectile 123 descends and the air cylinder 121 is closed, the projectile 123 squeezes the gas at the bottom of the impact cylinder 11, causing the gas to be discharged along the gap 113 and the exhaust port 111. Since the gap 113 is relatively small, the speed of gas discharge is slowed down. The gas provides an upward thrust to the projectile 123, so that the projectile 123 will not quickly fall to the bottom of the impact cylinder 11, causing a huge impact on the bottom of the impact cylinder 11 and thus causing damage to the bottom of the impact cylinder 11. At the same time, the relatively small gap 113 also reduces the waste of gas when the high-pressure gas impacts the projectile 123.

[0045] In this embodiment, the acceleration sensor to be tested and the reference acceleration sensor are installed on the mounting block 13 through two fixing members. The valve on the air cylinder 121 is opened, and the high-pressure air inside the air cylinder 121 is delivered to the bottom of the impact cylinder 11 through the air pipe 122, and the projectile 123 is pushed upward. The projectile 123 uses the repulsive force of the same-level magnets 1211 to push the column 124 upward. The column 124 drives the two acceleration sensors thereon to rise through the mounting block 13, so that the two acceleration sensors measure the acceleration. When the mounting block 13 and the two acceleration sensors rise to the maximum height, under the action of their own gravity, they automatically descend and are buffered by the buffer pad 112. By comparing the data measured on the acceleration sensor to be tested and the reference acceleration sensor, the accuracy of the measurement result of the acceleration sensor to be tested is judged. If the error is large, calibration is carried out; if it is small, it can be used.

[0046] In summary, in this embodiment, a device for detecting an acceleration sensor is provided. By comparing the data measured on the acceleration sensor to be tested and the reference acceleration sensor, the accuracy of the measurement result of the acceleration sensor to be tested is judged. The structure is simple and the test process is simple.

[0047] Embodiment 2, referring to Figures 1 to 5 , is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a driving component 24 and a sliding component 25 of the air-thrown impact calibration device for the acceleration sensor, which reduces the falling speed of the mounting block 13 and the two sensors. The driving component 24 includes a first vertical plate 241 disposed inside the mounting groove 23. One end of the first vertical plate 241 away from the impact cylinder 11 passes through the mounting groove 23 and is fixedly connected to a positioning plate 242. The positioning plate 242 is horizontally arranged, and the length of the positioning plate 242 is greater than the width of the mounting groove 23, that is, the positioning plate 242 will not enter the inside of the mounting groove 23. A driving block 243 is fixedly connected to the side of the first vertical plate 241 close to the friction pad 22. The driving block 243 is provided with a first inclined surface 244 and a first flat surface 245.

[0048] Further, the driving component 24 further includes a sliding groove 246 opened on the mounting block 13. The sliding groove 246 communicates with the mounting groove 23, and a slider 247 is disposed inside the sliding groove 246. One side of the slider 247 is connected to the first vertical plate 241;

[0049] Wherein, the sliding groove 246 is a through groove, and the sliding groove 246 matches the slider 247. The cross sections of the sliding groove 246 and the slider 247 are trapezoidal, so that the slider 247 can only move vertically up and down, thereby ensuring that the first vertical plate 241 can only move vertically up and down.

[0050] Further, the sliding assembly 25 includes a horizontal plate 251 detachably connected to the friction pad 22. A second vertical plate 252 is connected to the top of the horizontal plate 251. A plate in an L shape is formed between the second vertical plate 252 and the horizontal plate 251. One side of the second vertical plate 252 away from the first vertical plate 241 is connected with a telescopic rod 253 and a spring 254. The spring 254 is sleeved on the surface of the telescopic rod 253. One ends of the telescopic rod 253 and the spring 254 away from the second vertical plate 252 are both connected to the inner wall of the installation groove 23.

[0051] Among them, the friction pad 22 must be detachably connected. Due to multiple friction experiments, the friction pad 22 is easily worn. At this time, if it cannot be replaced, the deceleration effect of the friction pad 22 on the device will become worse and worse, resulting in the installation block 13 and the two acceleration sensors thereon descending too fast, causing problems such as damage to the buffer pad 112 and the two acceleration sensors. Moreover, the friction pad 22 has a lower cost compared to the acceleration sensors.

[0052] Among them, the setting of the telescopic rod 253 ensures that the spring 254 can only be compressed linearly, thereby ensuring the stability of the spring 254. At the same time, the setting of the telescopic rod 253 also ensures that the second vertical plate 252 can only move horizontally in a straight line. As a result, the force receiving block 255 on the second vertical plate 252 can only move horizontally in a straight line, facilitating the alignment of the position of the force receiving block 255 with the driving block 243. At the same time, since the second vertical plate 252 can only move horizontally, the horizontal plate 251 can only move horizontally. The horizontal plate 251 drives the friction pad 22 to move horizontally, ensuring the contact and non-contact between the friction pad 22 and the limiting frame 21.

[0053] Further, the sliding assembly 25 further includes a force receiving block 255 provided on the side of the second vertical plate 252 close to the first vertical plate 241. A second inclined surface 256 and a second flat surface 257 are provided on the force receiving block 255. The second inclined surface 256 corresponds to the first inclined surface 244, so that the first inclined surface 244 can squeeze the second inclined surface 256.

[0054] Further, the elastic force of the spring 254 is greater than the sum of the gravity of the slider 247, the gravity of the first vertical plate 241, and the gravity of the driving block 243. By making the elastic force of the spring 254 greater than the sum of the gravity of the slider 247, the gravity of the first vertical plate 241, and the gravity of the driving block 243, the positioning plate 242 at the top of the first vertical plate 241 does not contact the top of the installation block 13 in the initial state. The positioning plate 242 at the bottom of the first vertical plate 241 contacts the flat surface at the bottom of the installation block 13, and the other side at the bottom of the first vertical plate 241 contacts the top of the impact cylinder 11.

[0055] All other structures are the same as those in Embodiment 1.

[0056] During use, the limiting frame 21 is adjusted to an appropriate height. When detecting, the mounting block 13 drives the two acceleration sensors and the deceleration mechanism 2 to rise. When the positioning plate 242 at the top of the first vertical plate 241 contacts the top of the limiting frame 21, since the mounting block 13 still has an upward inertia force, the mounting block 13 will continue to rise. When the first vertical plate 241 descends, the first vertical plate 241 drives the driving block 243 thereon to descend, so that the first inclined surface 244 of the driving block 243 presses the second inclined surface 256 of the force-bearing block 255, thereby causing the force-bearing block 255 to move in the direction close to the side surface of the limiting frame 21. The force-bearing block 255 presses the telescopic rod 253 and the spring 254 through the second vertical plate 252, causing the telescopic rod 253 and the spring 254 to contract. At the same time, the second vertical plate 252 drives the friction pad 22 to move in the direction of the side surface of the limiting frame 21 through the horizontal plate 251. When the first flat surface 245 on the driving block 243 contacts the second flat surface 257 of the force-bearing block 255, at this time, the friction pad 22 contacts the side surface of the limiting frame 21. When the mounting block 13 descends, the friction pad 22 contacts the side surface of the limiting frame 21. Through the frictional force between the friction pad 22 and the limiting frame 21, the falling speed of the mounting block 13 is greatly reduced, and the impact force caused by the descent of the mounting block 13 and the two acceleration sensors thereon is reduced, avoiding the problem of damage to the acceleration sensor and the buffer pad 112 due to the impact force during descent;

[0057] Due to the interaction between the first flat surface 245 and the second flat surface 257, the friction pad 22 will not reset during the descent. When the positioning block at the bottom of the first vertical plate 241 contacts the top of the impact cylinder 11, the first vertical plate 241 rises. The first vertical plate 241 drives the driving block 243 to rise, and further causes the first flat surface 245 on the driving block 243 to be misaligned with the second flat surface 257 on the force-bearing block 255. At this time, under the action of the elastic force of the spring 254, the second vertical plate 252 resets. The second vertical plate 252 pushes up the driving block 243 through the force-bearing block 255. At the same time, the second vertical plate 252 drives the friction pad 22 to reset through the horizontal plate 251, so that the friction pad 22 does not contact the side surface of the limiting frame 21;

[0058] In summary, in this embodiment, a deceleration mechanism 2 for calibrating and detecting an acceleration sensor is provided. When ascending, the deceleration mechanism 2 does not operate, allowing the mounting block 13 to drive the acceleration sensor to be tested and the reference acceleration sensor to ascend synchronously. When reaching the maximum height, the deceleration mechanism 2 operates, causing the friction pad 22 to contact the side of the limit frame 21. Through the frictional force between the friction pad 22 and the limit frame 21, the falling speed of the mounting block 13 is greatly reduced, reducing the impact force caused by the descent of the mounting block 13 and the two acceleration sensors thereon, and avoiding the problem of damage to the acceleration sensor and the buffer pad 112 due to the impact force during descent.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An air-thrown impact calibration device for an acceleration sensor, characterized in that: Comprising, An impact mechanism (1), which includes an impact cylinder (11), an impact component (12) is arranged on the impact cylinder (11), an installation block (13) is arranged at the top of the impact cylinder (11), and an acceleration sensor to be tested and a reference acceleration sensor are installed at the top of the installation block (13) through two fixing members; A deceleration mechanism (2), which includes a limit frame (21) installed at the top of the impact cylinder (11), a friction pad (22) is arranged on one side of the installation block (13), an installation groove (23) is arranged on the installation block (13), a driving component (24) and a sliding component (25) are arranged inside the installation groove (23), and the driving component (24) is used to drive the sliding component (25) so that the sliding component (25) drives the friction pad (22) to fit against the side surface of the limit frame (21); The driving component (24) includes a first vertical plate (241) arranged inside the installation groove (23), one end of the first vertical plate (241) far from the impact cylinder (11) passes through the installation groove (23) and is connected with a positioning plate (242), a driving block (243) is connected to the side of the first vertical plate (241) close to the friction pad (22), and a first inclined surface (244) and a first flat surface (245) are arranged on the driving block (243); The driving component (24) further includes a sliding groove (246) opened on the installation block (13), the sliding groove (246) is communicated with the installation groove (23), a slider (247) is arranged inside the sliding groove (246), and one side of the slider (247) is connected with the first vertical plate (241).

2. The air-thrown impact type calibration device for the acceleration sensor according to claim 1, characterized in that: The impact component (12) includes an air cylinder (121) installed on the impact cylinder (11), an air pipe (122) is connected to the air cylinder (121), one end of the air pipe (122) far from the air cylinder (121) extends from the bottom of the impact cylinder (11) to the inside of the impact cylinder (11) and is communicated with the inside of the impact cylinder (11), a projectile (123) is arranged inside the impact cylinder (11), the projectile (123) is located at the top of one end of the air pipe (122) far from the air cylinder (121), a column (124) is arranged at the bottom of the installation block (13), and one end of the column (124) far from the installation block (13) extends into the inside of the impact cylinder (11); An exhaust port (111) is opened on the side wall of the impact cylinder (11), and the exhaust port (111) is located between the column (124) and the projectile (123).

3. The air-thrown impact type calibration device for the acceleration sensor according to claim 2, characterized in that: Two magnets (1211) are arranged inside the air cylinder (121), the two magnets (1211) have the same pole, and the two magnets (1211) are respectively located at one ends of the projectile (123) and the column (124) close to each other.

4. The air-thrown impact type calibration device for the acceleration sensor according to claim 3, characterized in that: A buffer pad (112) is arranged at the top of the impact cylinder (11).

5. The air-thrown impact type calibration device for an acceleration sensor according to claim 4, characterized in that: A certain gap (113) exists between the projectile (123) and the inner wall of the impact cylinder (11), and the gap (113) is relatively small.

6. The air-thrown impact calibration device for an acceleration sensor according to claim 5, characterized in that: The sliding assembly (25) includes a horizontal plate (251) detachably connected to the friction pad (22). A second vertical plate (252) is connected to the top of the horizontal plate (251). One side of the second vertical plate (252) away from the first vertical plate (241) is connected with a telescopic rod (253) and a spring (254). The spring (254) is sleeved on the surface of the telescopic rod (253), and one ends of the telescopic rod (253) and the spring (254) away from the second vertical plate (252) are both connected to the inner wall of the installation groove (23).

7. The air-thrown impact calibration device for the acceleration sensor according to claim 6, characterized in that: The sliding assembly (25) further includes a force-receiving block (255) arranged on one side of the second vertical plate (252) close to the first vertical plate (241). A second inclined surface (256) and a second flat surface (257) are arranged on the force-receiving block (255); The second inclined surface (256) corresponds to the first inclined surface (244).

8. The air-throwing impact calibration device for the acceleration sensor according to claim 7, characterized in that: The elastic force of the spring (254) is greater than the sum of the gravity of the slider (247), the gravity of the first vertical plate (241), and the gravity of the driving block (243).

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