A portable impact sensor calibration device

Abstract

This invention discloses a portable impact sensor calibration device, comprising, from top to bottom, an upper mounting plate, a conical target plate, a small buffer pad, a launching tube, a launching tube base plate, and a winding mechanism. The upper mounting plate is fixed to the upper end of the launching tube via a column, forming a calibration space. The conical target plate is located in the center of the calibration space, with its larger end facing upwards and its smaller end in contact with the small buffer pad. The larger end of the conical target plate has an outer edge. The target plate and the column are fitted with a clearance fit. The small buffer pad is installed at the opening of the launching tube. The launching tube contains a projectile, a compression spring, and a pull wire. The projectile is fitted with the launching tube with a clearance fit. The upper end of the compression spring abuts against the projectile, and the lower end abuts against the launching tube base plate. One end of the pull wire is connected to the projectile, and the other end passes through the compression spring and the launching tube base plate before connecting to the winding mechanism. The winding mechanism is installed at the bottom of the launching tube base plate and is used for winding and unwinding the pull wire. This invention can eliminate the additional errors caused by cable movement and the inconvenience of operation, improve the accuracy of calibration, and is convenient to carry.

Description

Technical Field

[0001] This invention relates to the field of sensor calibration technology, specifically to a portable impact sensor calibration device. Background Technology

[0002] Impact sensors, such as accelerometers and velocity sensors, have important applications in scientific research and engineering construction. They are fundamental devices for acquiring the impact parameters and response parameters of impact sources and their targets. Because many impact sensors exhibit time-varying characteristics, their sensitivity parameters change over time. To improve the accuracy of the acquired data, the sensitivity of the impact sensors generally needs to be calibrated before use.

[0003] The traditional method for calibrating impact sensors is to use a drop hammer (falling table) for calibration. Some impact sensors need to be mounted on the hammer surface, and the standard sensor and the sensor under test move together with the falling hammer for calibration. Another method is projectile impact calibration, in which the standard sensor and the sensor under test are calibrated by mounting them back to back.

[0004] The above-mentioned calibration method and apparatus have the following problems:

[0005] First, the movement of the sensor along with the moving parts will cause the cable to move, leading to unnecessary errors and inconvenience in operation.

[0006] Second, the sensor mounting surface is small, which limits the number of sensors that can be calibrated at the same time, resulting in low calibration efficiency.

[0007] Third, existing calibration instruments for impact sensors are bulky and heavy, inconvenient to carry, have high environmental requirements, and require power supply, making them unsuitable for use in field tests. Summary of the Invention

[0008] The purpose of this invention is to provide a portable impact sensor calibration device that solves the problems of large calibration error and low calibration efficiency in existing devices.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A portable impact sensor calibration device is characterized by comprising, from top to bottom, an upper mounting plate, a conical target plate, a small buffer pad, a transmitter tube, a transmitter tube base plate, and a winding mechanism.

[0011] The upper mounting plate is fixedly connected to the upper end of the transmitting tube by N columns, and a calibration space is formed between the upper mounting plate and the upper end face of the transmitting tube;

[0012] The conical target plate is located in the middle of the calibration space and is coaxially arranged with the transmitting tube, with its large end facing upward and its small end in contact with the small buffer pad; the large end of the conical target plate is provided with an outer edge; the outer edge of the target plate is fitted onto the column and is clearance-fitted with the column; the bottom surface of the outer edge of the target plate is used to install the sensor to be calibrated;

[0013] The small buffer pad is installed at the upper end of the nozzle of the transmitting tube;

[0014] The launching tube contains a projectile, a compression spring, and a pull wire; the projectile is fitted with the launching tube with a clearance; the upper end of the compression spring abuts against the projectile, and its lower end abuts against the bottom plate of the launching tube; one end of the pull wire is connected to the projectile, and the other end passes through the compression spring and the bottom plate of the launching tube in sequence before being connected to the winding mechanism;

[0015] The winding mechanism is installed at the bottom of the base plate of the launch tube and is used to wind up or release the pull wire.

[0016] One possible implementation also includes a large buffer pad, an insulating ring, and a buffer pad retainer ring;

[0017] The large buffer pad is fixedly installed on the top of the outer edge of the target plate, and is fitted onto the column with a clearance fit.

[0018] The insulating ring is fixedly installed on the bottom outer edge of the target plate and fitted onto the column, with a clearance fit with the column; the bottom surface of the insulating ring is used to install the sensor to be calibrated.

[0019] The buffer pad retaining ring is fitted over the small buffer pad.

[0020] In one possible implementation, an outer edge of the launching tube is provided on the outer wall of the upper end of the launching tube;

[0021] The outer diameter of the upper mounting plate is equal to the outer diameter of the outer edge of the launching tube;

[0022] The column is installed between the upper mounting plate and the outer edge of the launching tube;

[0023] The small buffer pad and the buffer pad retaining ring are installed on the outer edge of the transmitting tube;

[0024] A support rod is provided between the outer edge of the launch tube and the base plate of the launch tube.

[0025] In one possible implementation, the tube wall of the launching tube is provided with an observation window for observing the position of the projectile in order to measure the velocity of the projectile;

[0026] The observation window is provided with a scale along the axial direction of the emission tube.

[0027] In one possible implementation, the projectile has a first limiting groove at its bottom;

[0028] The base plate of the launch tube is provided with a second limiting groove;

[0029] The two ends of the compression spring are respectively installed in the first limiting groove and the second limiting groove;

[0030] The projectile is also equipped with a lifting ring at its bottom;

[0031] One end of the pull wire is connected to the projectile via the lifting ring.

[0032] In one possible implementation, the winding mechanism includes a winding housing and a spool, a spool mounting base, a motor, a battery assembly, and a control module located within the winding housing;

[0033] The other end of the pull wire is connected to the reel;

[0034] The reel is mounted on the reel mounting base;

[0035] The output shaft of the motor is connected to the rotating shaft of the spool, and is used to drive the spool to rotate;

[0036] The battery assembly is connected to the motor and is used to supply power to the motor;

[0037] The control module is connected to the motor and is used to control the start and stop of the motor.

[0038] In one possible implementation, a ratchet is fixedly connected to one side of the spool;

[0039] The cable shell is provided with a pawl;

[0040] The pawl's working end engages with the ratchet, while its other end extends out of the winding housing for operation.

[0041] In one possible implementation, the winding mechanism further includes a first bevel gear and a second bevel gear that mesh with each other;

[0042] The first bevel gear is connected to one end of the rotating shaft of the spool;

[0043] The second bevel gear is connected to the output shaft of the motor.

[0044] In one possible implementation, the winding mechanism further includes a slide rail and a slider disposed on the slide rail, as well as a toggle lever;

[0045] The slide rail is fixed inside the coil housing;

[0046] The motor is fixed to the slider;

[0047] The actuating lever is mounted on the cable reel housing, with one end connected to the slider for actuating the slider to drive the motor to move, thereby controlling the engagement and disengagement of the first bevel gear and the second bevel gear. The other end extends out of the cable reel housing for operation.

[0048] In one possible implementation, the winding mechanism further includes a crank handle;

[0049] One end of the crank handle is located outside the cable winding housing, and the other end extends into the cable winding housing and is connected to the other end of the rotating shaft of the spool.

[0050] The beneficial effects of this invention are:

[0051] 1. The present invention sets up a calibration space between the upper mounting plate and the transmitting tube, and a conical target plate is set in the calibration space. The conical target plate is a nearly stationary part. The impact sensor is set on the conical target plate for calibration, which can eliminate the additional errors caused by cable movement and the inconvenience of operation, and improve the accuracy of calibration results.

[0052] 2. The present invention adopts a conical target plate with a conical amplification structure, which can expand the installation space of the sensor while ensuring that the impact signals of the standard sensor and the sensor under test are consistent, thereby increasing the number of sensors that can be calibrated at one time and improving the calibration efficiency.

[0053] 3. The calibration device of the present invention uses a compression spring to drive the projectile to impact the conical target plate. The impact force is moderate, which meets the calibration requirements of most impact sensors. Furthermore, various types of sensors to be calibrated can be replaced as needed, thus broadening the applicability of the calibration device.

[0054] 4. The calibration device of the present invention adopts both manual and electric operation modes, which increases the convenience of using the calibration device. At the same time, a structure is designed between the two modes to avoid operational misalignment, that is, by moving the lever to control the meshing and disengagement of the first bevel gear and the second bevel gear, to ensure the reliability of the device.

[0055] 5. The calibration device of the present invention has a small overall size, is compact and lightweight, has no auxiliary equipment, is easy to carry, and is suitable for temporary use in field tests. Attached Figure Description

[0056] Figure 1 A cross-sectional view of a portable impact sensor calibration device provided by the present invention;

[0057] Figure 2 This is a schematic diagram of the structure of a portable impact sensor calibration device provided by the present invention;

[0058] Figure 3This is an exploded view of the structure of a portable impact sensor calibration device provided by the present invention;

[0059] Figure 4 This is a schematic diagram of the winding mechanism structure provided in this invention;

[0060] Figure 5 This is a cross-sectional view of the winding mechanism provided in this invention;

[0061] Figure 6 This is a partial enlarged view of the structure of a portable impact sensor calibration device provided by the present invention.

[0062] Icon labels:

[0063] 1-Projectile, 2-Lifting ring, 3-Pull wire, 4-Compression spring, 5-Launch tube, 6-Support rod, 7-Launch tube base plate, 8-Wire winding mechanism, 9-Sensor mounting assembly, 10-Wire winding housing, 91-Buffer pad guard ring, 92-Small buffer pad, 93-Conical target plate, 931-Target plate outer edge, 94-Post, 95-Insulating ring, 96-Large buffer pad, 97-Upper mounting plate, 801-Wire reel, 802-Ratchet, 803-Pawl, 804-Wire reel mounting rear seat, 805-Wire reel mounting front seat, 806-First bevel gear, 807-Second bevel gear, 808-Motor, 809-Slide rail, 810-Actuating lever, 811-Battery assembly, 812-Control module, 813-Power button, 814-Rolling bearing, 815-Crank handle. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] Figure 1 A cross-sectional view of a portable impact sensor calibration device provided by the present invention; Figure 2 This is a schematic diagram of the structure of a portable impact sensor calibration device provided by the present invention; Figure 3 This is an exploded view of the structure of a portable impact sensor calibration device provided by the present invention; combined with Figures 1 to 3As shown, the portable impact sensor calibration device includes a projectile 1, a lifting ring 2, a pull wire 3, a compression spring 4, a launching tube 5, a support rod 6, a launching tube base plate 7, a winding mechanism 8, a sensor mounting assembly 9, and a winding housing 10. The projectile 1 is threaded to the bottom of a lifting ring 2. One end of a pull wire 3 is attached to the lifting ring 2, allowing the projectile 1 to slide within the launching tube 5. The bottom of the launching tube 5 is connected to the launching tube base plate 7, which has a hole in its center. The other end of the pull wire 3 passes through the middle of the compression spring 4 and is connected to the winding mechanism 8. The winding mechanism 8 winds up the wire and pulls the projectile 1 through the pull wire 3, causing the projectile 1 to move downwards and compress the compression spring 4, thus storing energy. The bottom of the projectile 1 has a first annular limiting groove, and the launching tube base plate 7 has a second annular limiting groove. The two ends of the compression spring 4 are respectively engaged in the first and second limiting grooves to achieve positioning. The outer wall of the top of the launching tube 5 has an outer edge, and the outer diameter of the upper mounting plate 97 is equal to the outer diameter of the outer edge of the launching tube. The two ends of the support rod 6 are threaded to the outer edge of the launching tube and the launching tube base plate 7, respectively, providing support. The winding housing 10 is connected to the bottom of the launching tube base plate 7, and the winding mechanism 8 is placed inside the winding housing 10. The sensor mounting assembly is located on the top of the launching tube 5 and contacts the head of the projectile 1. The tube wall of the launching tube 5 is provided with an observation window for observing the position of the projectile 1, so that the velocity of the projectile 1 can be measured by optical methods, and the position of the projectile 1 can be controlled according to the required impact force.

[0066] Figure 4 This is a schematic diagram of the winding mechanism structure provided by the present invention; Figure 5 A cross-sectional view of the winding mechanism provided by the present invention; combined with Figure 4 and Figure 5As shown, the winding mechanism 8 includes a spool 801, a ratchet 802, a pawl 803, a spool mounting base (the spool mounting base includes a rear spool mounting base 804 and a front spool mounting base 805), a first bevel gear 806, a second bevel gear 807, a motor 808, a slide rail 809, a lever 810, a battery assembly 811, a control module 812, a power button 813, a rolling bearing 814, and a crank handle 815. A ratchet 802 is mounted on one side of the spool 801. The ratchet 802 is fixed to the spool 801 by bolts. Each end of the shaft of the spool 801 is mounted on a spool mounting back seat 804 and a spool mounting front seat 805 respectively via a rolling bearing 814. The two rolling bearings 814 are interference-fitted with the spool mounting back seat 804 and the spool mounting front seat 805 respectively. The shaft of the spool 801 passes through the spool mounting front seat 805 and connects to a first bevel gear 806. A second bevel gear 807 is mounted on the shaft of a motor 808. The motor 808 can be a DC motor. The first bevel gear 806 and the second bevel gear 807 can mesh with each other. A slide rail 809 is fixedly mounted in the winding housing 10. The motor 808 is fixed to the slider of the slide rail 809 via a motor mounting plate. The slide rail 809, the spool mounting back seat 804, and the spool... The bottom of the mounting base 805 is fixed to the winding housing 10 by threads. The pawl 803 is installed on the side wall of the winding housing 10 by a cylindrical pin and can swing up and down around the cylindrical pin. When it swings downward, the pawl 803 engages with the ratchet 802, preventing the ratchet 802 from rotating in reverse and allowing it to rotate only in the forward direction. When the pawl 803 swings upward, it releases the ratchet 802, allowing it to rotate in reverse under the tension of the pull wire 3, thereby achieving the storage and release of energy for the projectile 1. The actuating lever 810 is installed on the side wall of the winding housing 10 by a cylindrical pin and can swing left and right around the cylindrical pin. The actuating lever 810 is close to the lower part of the mounting base 805 of the reel. The motor mounting plate has a mounting plate notch. One end of the actuating lever 810 inside the winding housing 10 is inserted into the mounting plate notch, and the other end of the actuating lever 810 extends out of the winding housing 10 for operation. If the other end of lever 810 is swung to the right, the end of lever 810 located inside the winding housing 10 can push motor 808 away along slide rail 809. At this time, second bevel gear 807 disengages from first bevel gear 806, and motor 808 no longer provides power for the rotation of spool 801. At the same time, when pawl 803 releases ratchet 802, motor 808 will not restrict spool 801 from reversing.Therefore, logically, the restriction on the reel 801's reverse rotation by the motor 808 should be released first, allowing the pawl 803 to release the ratchet 802. This enables the reel 801 to reverse and unload the wire, allowing the projectile 1 to be launched axially along the launching tube 5 using the potential energy of the compression spring 4, impacting the sensor mounting assembly 9. This sequential logic is also considered in the design of the pawl 803 and the lever 810 located outside the winding housing 10. When the lever 810 is not swinging to the right, the pawl 803 is restricted by the lever 810 and cannot swing upward to release the ratchet 802. Swinging the lever 810 is also a necessary step for switching between electric and manual winding operations. The battery assembly 811 and control module 812 of the motor 808 are located inside the winding housing 10, and the power button 813 is mounted on the wall of the winding housing 10 on the same side as the pawl 803 and the lever 810. The reel mounting seat 804 has a through hole, which is coaxially connected to the round hole on the side wall of the winding housing 10. The shaft of the reel 801 is mounted on one end of the reel mounting seat, and extends out of the rolling bearing 814 mounted on the reel mounting seat 804 and is located in the through hole. The part located in the through hole is provided with a square shaft. One end of the crank handle 815 is provided with a square hole. One end of the crank handle 815 is inserted into the through hole of the reel mounting seat 804 through the round hole on the side wall of the winding housing 10. The square hole cooperates with the square shaft. The other end of the crank handle 815 is located outside the winding housing 10, so that turning the crank handle 815 can drive the reel 801 to rotate, realize the winding of the line and compress the pressure spring 4. Turning the crank handle 815 is the manual mode for winding the line.

[0067] Figure 6 A partial enlarged view of the structure of a portable impact sensor calibration device provided by the present invention is shown below. Figure 6As shown, the sensor mounting assembly 9 includes a buffer pad retaining ring 91, a small buffer pad 92, a conical target plate 93, pillars 94, an insulating ring 95, a large buffer pad 96, and an upper mounting plate 97. The buffer pad retaining ring 91 is coaxial with the launching tube 5, and its inner diameter is larger than the outer diameter of the projectile 1. It is fixed to the outer edge of the launching tube 5 by bolts. The small buffer pad 92 is placed inside the buffer pad retaining ring 91, and its outer diameter is larger than the outer diameter of the projectile 1. The upper end face of the small buffer pad 92 corresponds to the small end face of the conical target plate 93. The conical target plate 93 is a rotating structure with a T-shaped side. The two ends of the four pillars 94 are respectively fixed to the outer edge of the launching tube 5 and the upper mounting plate 97. The outer edge of the launching tube is provided with positioning holes. The outer edge 931 of the conical target plate 93, the insulating ring 95, and the large buffer pad 96 are fitted onto each pillar 94 and are clearance-fitted with each pillar 94, allowing free movement along the pillars 94. The large buffer pad 94... The top of the target plate 931 is fixed to the outer edge 96, and the bottom of the target plate 931 is fixed to the outer edge 931 by bolts. Various sensors to be calibrated can be installed in the calibration space between the insulating ring 95 and the outer edge of the transmitting tube. The sensors to be calibrated can be fixed to the bottom of the insulating ring 95 by bolts that pass sequentially through the large buffer pad 96, the outer edge of the target plate, and the insulating ring 95. This allows the sensors to be calibrated to be placed within the calibration space between the insulating ring 95 and the outer edge of the transmitting tube. Various types of sensors to be calibrated can also be evenly arranged along the circumference of the insulating ring 95, improving calibration efficiency and broadening the application range. Operating holes for mounting bolts can also be provided on the upper mounting plate 97 for easy tightening of bolts.

[0068] This invention provides a portable impact sensor calibration device. A compression spring powers a projectile that impacts a conical target plate on which a sensor to be calibrated is mounted, providing a calibration impact signal. The center of the small end of the conical target plate is the projectile impact point. The sensor to be calibrated is uniformly mounted around the outer edge of the target plate, and calibration is performed using a comparative calibration method. Because the bottom insulating ring of the sensor has a 95° angle, it can accommodate the calibration of charge sensors. The projectile's energy storage method is a wire compression spring, which is released via a ratchet, pawl, and a lever. Furthermore, this portable impact sensor calibration device has two release methods: manual and electric. In manual mode, a crank handle drives the reel, while in electric mode, a battery-powered DC motor drives the reel through gear meshing. In addition, this portable impact sensor calibration device has advantages such as small size, easy operation, and high practicality. It can quickly calibrate the sensitivity of impact acceleration and velocity sensors under field conditions, or perform secondary calibration after a test. Because the calibration device is portable and does not require power, it is suitable for various occasions where impact sensors need temporary calibration.

[0069] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0070] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A portable impact sensor calibration device, characterized in that: It includes, from top to bottom, an upper mounting plate (97), a conical target plate (93), a small buffer pad (92), a launch tube (5), a launch tube base plate (7), and a winding mechanism (8); The upper mounting plate (97) is fixedly connected to the upper end of the transmitting tube (5) through N columns (94), and a calibration space is formed between the upper mounting plate (97) and the upper end face of the transmitting tube (5); The conical target plate (93) is located in the middle of the calibration space and is coaxially arranged with the transmitting tube (5). Its large end faces upward and its small end contacts the small buffer pad (92). The large end of the conical target plate (93) is provided with an outer edge (931). The outer edge (931) of the target plate is fitted onto the column (94) and is clearance-fitted with the column (94). The bottom surface of the outer edge (931) of the target plate is used to install the sensor to be calibrated. The small buffer pad (92) is installed at the upper end of the opening of the transmitting tube (5); The launching tube (5) is equipped with a projectile (1), a compression spring (4), and a pull wire (3); the projectile (1) is fitted with the launching tube (5) with a clearance; the upper end of the compression spring (4) abuts against the projectile (1), and its lower end abuts against the base plate (7) of the launching tube; one end of the pull wire (3) is connected to the projectile (1), and the other end passes through the compression spring (4) and the base plate (7) of the launching tube in sequence and is connected to the winding mechanism (8); The winding mechanism (8) is installed at the bottom of the base plate (7) of the launch tube and is used to wind up or release the pull wire (3).

2. The portable impact sensor calibration device according to claim 1, characterized in that: It also includes a large buffer pad (96), an insulating ring (95), and a buffer pad retainer ring (91); The large buffer pad (96) is fixedly installed on the top of the outer edge (931) of the target plate and fitted onto the column (94), with a clearance fit to the column (94); the insulating ring (95) is fixedly installed on the bottom of the outer edge (931) of the target plate and fitted onto the column (94), with a clearance fit to the column (94); the bottom surface of the insulating ring (95) is used to install the sensor to be calibrated. The buffer pad guard ring (91) is fitted over the small buffer pad (92).

3. The portable impact sensor calibration device according to claim 2, characterized in that: The outer wall of the upper end of the launching tube (5) is provided with an outer edge of the launching tube; The outer diameter of the upper mounting plate (97) is equal to the outer diameter of the outer edge of the launching tube; The column (94) is installed between the upper mounting plate (97) and the outer edge of the launching tube; The small buffer pad (92) and the buffer pad retaining ring (91) are installed on the outer edge of the transmitting tube; A support rod (6) is provided between the outer edge of the launch tube and the base plate (7) of the launch tube.

4. The portable impact sensor calibration device according to any one of claims 1-3, characterized in that: The firing tube (5) has an observation window on its wall for observing the position of the projectile (1) and measuring the speed of the projectile (1); The observation window is provided with a scale along the axial direction of the emission tube (5).

5. The portable impact sensor calibration device according to any one of claims 1-3, characterized in that: The bottom of the projectile (1) is provided with a first limiting groove; The base plate (7) of the launching tube is provided with a second limiting groove; The two ends of the compression spring (4) are respectively installed in the first limiting groove and the second limiting groove; The bottom of the projectile (1) is also provided with a hanging ring (2); One end of the pull wire (3) is connected to the projectile (1) through the hanging ring (2).

6. The portable impact sensor calibration device according to any one of claims 1-3, characterized in that: The winding mechanism (8) includes a winding housing (10) and a spool (801), a spool mounting base, a motor (808), a battery assembly (811), and a control module (812) located within the winding housing (10); The other end of the pull wire (3) is connected to the reel (801); The spool (801) is mounted on the spool mounting base; The output shaft of the motor (808) is connected to the rotation shaft of the reel (801) to drive the reel (801) to rotate; The battery assembly (811) is connected to the motor (808) and is used to supply power to the motor (808); The control module (812) is connected to the motor (808) and is used to control the start and stop of the motor (808).

7. The portable impact sensor calibration device according to claim 6, characterized in that: A ratchet (802) is fixedly connected to one side of the spool (801); The cable housing (10) is provided with a pawl (803); The working end of the pawl (803) engages with the ratchet (802), and its other end extends out of the winding housing (10) for operation.

8. The portable impact sensor calibration device according to claim 6, characterized in that: The winding mechanism (8) further includes a first bevel gear (806) and a second bevel gear (807) that mesh with each other; The first bevel gear (806) is connected to one end of the rotating shaft of the spool (801); The second bevel gear (807) is connected to the output shaft of the motor (808).

9. The portable impact sensor calibration device according to claim 8, characterized in that: The winding mechanism (8) further includes a slide rail (809) and a slider disposed on the slide rail (809), as well as a lever (810); The slide rail (809) is fixed inside the coil housing (10); The motor (808) is fixed to the slider; The actuating lever (810) is mounted on the winding housing (10), with one end connected to the slider for actuating the slider to drive the motor (808) to move, thereby controlling the engagement and disengagement of the first bevel gear (806) and the second bevel gear (807). The other end extends out of the winding housing (10) for operation.

10. The portable impact sensor calibration device according to claim 8, characterized in that: The winding mechanism (8) also includes a crank (815); One end of the crank handle (815) is located outside the winding housing (10), and the other end extends into the winding housing (10) and is connected to the other end of the rotating shaft of the spool (801).

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