A falling impact calibration device

Abstract

The present invention discloses a falling impact calibration device, which relates to the field of velocity sensor calibration technology. The purpose is to provide a falling impact calibration device that can release the falling part from the center to avoid the lateral force generated by the falling part and thus causing data errors. The technical key points include a machine base, four sliding bars are provided on the machine base, a top plate is provided on the top of the sliding bar, a sliding sleeve is provided on the sliding bar, a retaining frame is provided between the sliding sleeves, and an impact component with a built-in standard velocity sensor and a calibrated velocity sensor is provided at the center position of the lower part of the retaining frame. The technical effect is that by setting an electromagnetic adsorption component and a fixing component, the permanent magnet electromagnet in the electromagnetic adsorption component retains magnetism when not powered, and uses the magnetic adsorption of the ferromagnetic metal plate in the fixing component to fix the retaining frame with the fixing frame, and the fixing point is located at the center of the retaining frame. In this way, lateral force on the retaining frame can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of velocity sensor calibration, in particular to a falling-type impact calibration device. Background Art

[0002] The falling impact calibration equipment is a device used to calibrate velocity sensors. It is mainly composed of a lifting and releasing mechanism, a falling component, a guide mechanism, a base and other parts. Its principle is to allow the falling component to fall under the action of the guide mechanism. By comparing the signal data collected by the standard velocity sensor installed on the falling component and the velocity sensor to be calibrated, the velocity sensor to be calibrated is calibrated.

[0003] Existing falling impact calibration equipment all use a horizontal push-pull structure as a release mechanism. This method only acts on one side of the falling component, which will generate a lateral force on the falling component, causing the friction coefficient between the two sides of the falling component and the guide mechanism to be inconsistent. In some high-precision calibration work, errors are prone to occur, and after long-term use, it will also cause eccentric wear problems between the falling component and the guide mechanism. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present invention provides a falling impact calibration device that can release a falling part from the center to avoid lateral forces generated by the falling part and thus causing data errors.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a drop-type impact calibration device, comprising a machine base, four slide bars provided on the machine base, a top plate provided on top of the slide bars, sleeves provided on the slide bars, a retaining frame provided between the sleeves, an impact component with a built-in standard speed sensor and a calibrated speed sensor provided at the center of the lower portion of the retaining frame, a fixing component provided at the center of the upper portion, an impact platform provided at a position on the machine base corresponding to the impact component, and an electromagnetic adsorption component provided at a position on the top plate corresponding to the fixing component;

[0008] The electromagnetic adsorption component includes a fixed plate provided on the top plate, a permanent magnet electromagnet penetrating the top plate is provided in the fixed plate, and a connection port for power supply is provided on the permanent magnet electromagnet;

[0009] The fixing component includes a fixing frame provided on the retaining frame, and the fixing frame is provided with a ferromagnetic metal plate that generates magnetic attraction with the permanent magnet electromagnet;

[0010] A lifting drive component is provided between the machine base and the top plate, lifting linkage components that are linked to the lifting drive component are provided on both sides of the retaining frame, an upper trigger rack that triggers the lifting linkage component to separate from the lifting drive component is provided under the top plate, and a lower trigger rack that triggers the lifting linkage component to fit with the lifting drive component is provided on the machine base.

[0011] Preferably, the lifting linkage component includes a support frame fixedly connected to the retaining frame, a clip assembly that fits with the lifting drive component and a trigger assembly that changes the state of the clip assembly are slidably provided in the support frame, and a vertical through-hole is opened in the support frame at the position corresponding to the trigger assembly.

[0012] Preferably, the lifting drive component includes a reduction motor arranged in the machine base, the output end of the reduction motor is provided with a driving wheel, the top plate is provided with a driven wheel, a chain is provided between the driving wheel and the driven wheel, and fixing rings that cooperate with the clamping assembly are equidistantly provided on the chain.

[0013] Preferably, the clamping assembly includes a receiving groove provided in the support frame, a clamping block which is slidably provided in the receiving groove and fits with the fixing ring, a first spring is provided between the clamping block and the receiving groove, and a top of the clamping block is vertically cut with an inclined surface.

[0014] Preferably, the trigger assembly includes a gear that rotates in the through-hole, and the gear is located between the upper trigger rack and the lower trigger rack. A horizontal rack is engaged under the gear, and a pushing frame is provided under the horizontal rack, which is in contact with the top inclined surface of the block.

[0015] Preferably, the lower trigger rack includes a first rack passing through the machine base, a sliding groove is provided on the side of the first rack, and the sliding groove is cooperated with a slider fixed on the machine base, and a second spring connected to the inside of the machine base is provided under the first rack.

[0016] Preferably, the impact component includes a centering plate provided at the bottom of the retaining frame, the centering plate is connected to the retaining frame by bolts, and a hammer head is provided in the centering plate for vertical sliding, and the hammer head has built-in standard speed sensor and calibrated speed sensor.

[0017] Preferably, permanent magnets are provided on both sides of the retaining frame, and an electromagnetic acceleration component is provided under the top plate for accelerating the retaining frame by using the permanent magnets.

[0018] Preferably, the electromagnetic acceleration component includes a connecting frame arranged under the top plate, a control mainboard is arranged vertically downward in the connecting frame, and capacitor coils with opposite magnetic properties to the permanent magnet are equidistantly arranged in the control mainboard.

[0019] Preferably, the machine base is provided with a damping component in contact with the retaining frame, and the damping component includes a liquid damper provided on the machine base, and the liquid damper is provided with a rubber pad in contact with the retaining frame.

[0020] (3) Beneficial effects

[0021] Compared with the prior art, the present invention provides a drop-type impact calibration device with the following beneficial effects:

[0022] 1. By setting an electromagnetic adsorption component and a fixing component, the permanent magnet electromagnet in the electromagnetic adsorption component retains magnetism when not powered, and uses magnetism to adsorb the ferromagnetic metal plate in the fixing component, so that the retaining frame is fixed by the fixing frame, and the fixing point is located at the center of the retaining frame. When it needs to be released, the permanent magnet electromagnet is energized to generate an electromagnetic field that offsets the original magnetism, causing the ferromagnetic metal plate to lose its adsorption effect, thereby causing the retaining frame to fall. In this way, lateral force on the retaining frame can be avoided, the value of the impact component can be prevented, and the problem of eccentric wear between the sliding sleeve and the sliding rod can be avoided.

[0023] 2. By setting a lifting drive component and a lifting linkage component, when the lifting linkage component is at the bottom, the lower trigger rack will push the lifting linkage component to engage with the lifting drive component. At this time, the lifting drive component can use the lifting linkage component to drive the retaining frame to move upward, thereby achieving the purpose of automatically lifting the retaining frame. When the lifting linkage component moves to the top, the upper trigger rack will push the lifting linkage component in the opposite direction to separate it from the lifting drive component. At this time, the lifting linkage component no longer contacts the lifting drive component, thereby avoiding affecting the falling movement of the retaining frame.

[0024] 3. By setting up permanent magnets and electromagnetic acceleration components, capacitor coils are equidistantly arranged in the electromagnetic acceleration components. When working, the capacitor coils enter the pulse excitation state from top to bottom in sequence, so that they generate instantaneous magnetism, and use the magnetism to pull the permanent magnet, so that the permanent magnet drives the retaining frame to move downward quickly. In this way, the falling speed of the retaining frame can be increased, so that the impact component can be used to detect some impact acceleration sensors with a larger range of values. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional schematic diagram of the present invention;

[0026] Figure 2 is a schematic diagram of a cross-section of a top plate of the present invention;

[0027] Figure 3 is a three-dimensional schematic diagram of the retainer of the present invention;

[0028] Figure 4 A schematic diagram of a three-dimensional lifting drive component of the present invention;

[0029] Figure 5 It is a three-dimensional schematic diagram of the machine base of the present invention;

[0030] Figure 6 A schematic diagram of a three-dimensional lower trigger rack of the present invention;

[0031] Figure 7 is a schematic diagram of a retainer according to the present invention when viewed from above;

[0032] Figure 8 It is a three-dimensional schematic diagram of the electromagnetic acceleration component of the present invention;

[0033] Figure 9 A schematic diagram of a cross section of a lifting linkage component of the present invention;

[0034] Figure 10 It is a schematic diagram of the matching state of the trigger component and the snap-on component of the present invention.

[0035] In the figure: 1. Machine base; 2. Impact table;

[0036] 3. Damping components; 301. Liquid damper; 302. Rubber pad;

[0037] 4. Sliding sleeve; 5. Cage; 6. Sliding rod;

[0038] 7. Lifting linkage components; 701. Support frame;

[0039] 702, snap-on assembly; 7021, receiving slot; 7022, first spring; 7023, clamping block;

[0040] 703, trigger assembly; 7031, gear; 7032, horizontal rack; 7033, push frame;

[0041] 704, through-mouth;

[0042] 8. Lifting drive components; 801. Driving wheel; 802. Reducer motor; 803. Chain; 804. Fixed ring; 805. Driven wheel;

[0043] 9. Top plate;

[0044] 10. Electromagnetic adsorption component; 1001. Fixing plate; 1002. Permanent magnet electromagnet; 1003. Wiring port;

[0045] 11. Electromagnetic acceleration component; 1101. Connecting frame; 1102. Control main board; 1103. Capacitor coil;

[0046] 12. Fixing member; 1201. Fixing frame; 1202. Ferromagnetic metal plate;

[0047] 13. Impact component; 1301. Hammer head; 1302. Bolt; 1303. Centering plate;

[0048] 14. Permanent magnet;

[0049] 15. Lower trigger rack; 1501. First rack; 1502. Slide; 1503. Slider; 1504. Second spring;

[0050] 16. Upper trigger rack. DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] See also Figure 1-10 A drop-type impact calibration device includes a machine base 1, four slide bars 6 are provided on the machine base 1, a top plate 9 is provided on the top of the slide bars 6, a sliding sleeve 4 is provided on the slide bars 6, a retaining frame 5 is provided between the sliding sleeves 4, an impact component 13 with a built-in standard speed sensor and a calibrated speed sensor is provided at the center position of the lower part of the retaining frame 5, a fixing component 12 is provided at the center position of the upper part, an impact platform 2 is provided at a position corresponding to the impact component 13 on the machine base 1, and an electromagnetic adsorption component 10 is provided at a position corresponding to the fixing component 12 on the top plate 9;

[0053] The electromagnetic attraction component 10 includes a fixed plate 1001 provided on the top plate 9. The fixed plate 1001 is provided with a permanent magnet electromagnet 1002 that penetrates the top plate 9. The permanent magnet electromagnet 1002 is provided with a connection port 1003 for power supply. The fixing component 12 includes a fixing frame 1201 provided on the retaining frame 5. The fixing frame 1201 is provided with a ferromagnetic metal plate 1202 that produces magnetic attraction with the permanent magnet electromagnet 1002.

[0054] like Figure 2 、 Figure 3As shown, by setting an electromagnetic adsorption component 10 and a fixing component 12, the permanent magnet electromagnet 1002 in the electromagnetic adsorption component 10 retains magnetism when not powered on, and utilizes magnetic adsorption to adsorb the ferromagnetic metal plate 1202 in the fixing component 12, so that it uses the fixing frame 1201 to fix the retaining frame 5, and the fixing point is located at the center of the retaining frame 5. When it needs to be released, the permanent magnet electromagnet 1002 is energized to generate an electromagnetic field that offsets the original magnetism, so that the ferromagnetic metal plate 1202 loses its adsorption effect, and then the retaining frame 5 falls. In this way, lateral force on the retaining frame 5 can be avoided, the value of the impact component 13 can be prevented, and the problem of eccentric wear between the sleeve 4 and the slide rod 6 can be avoided. The structure and principle of the permanent magnet electromagnet 1002 are existing mature technologies and will not be elaborated here.

[0055] A lifting drive component 8 is provided between the machine base 1 and the top plate 9. Lifting linkage components 7 that are linked to the lifting drive component 8 are provided on both sides of the retaining frame 5. An upper trigger rack 16 that triggers the lifting linkage component 7 to separate from the lifting drive component 8 is provided under the top plate 9. A lower trigger rack 15 that triggers the lifting linkage component 7 to fit with the lifting drive component 8 is provided on the machine base 1. The lifting linkage component 7 includes a support frame 701 fixedly connected to the retaining frame 5. A clamping assembly 702 that fits with the lifting drive component 8 and a triggering assembly 703 that changes the state of the clamping assembly 702 are slidably provided in the support frame 701. A vertical through-hole 704 is opened in the support frame 701 at a position corresponding to the triggering assembly 703.

[0056] like Figure 3 、 Figure 4 As shown, by setting the lifting drive component 8 and the lifting linkage component 7, when the lifting linkage component 7 is at the bottom, the lower trigger rack 15 will push the lifting linkage component 7 to engage with the lifting drive component 8. At this time, the lifting drive component 8 can use the lifting linkage component 7 to drive the retaining frame 5 to move upward, thereby achieving the purpose of automatically lifting the retaining frame 5. When the lifting linkage component 7 moves to the top, the upper trigger rack 16 will push the lifting linkage component 7 in the opposite direction to separate it from the lifting drive component 8. At this time, the lifting linkage component 7 is no longer in contact with the lifting drive component 8, thereby avoiding affecting the falling movement of the retaining frame 5.

[0057] The lifting drive component 8 includes a reduction motor 802 disposed in the machine base 1. A driving pulley 801 is provided at the output end of the reduction motor 802. A driven pulley 805 is provided on the top plate 9. A chain 803 is provided between the driving pulley 801 and the driven pulley 805. Fixed rings 804 that cooperate with the clamping assembly 702 are equidistantly provided on the chain 803.

[0058] like Figure 4As shown, by setting a chain 803 and a fixed ring 804, the chain 803 can move on the driving wheel 801 and the driven wheel 805, and the fixed ring 804 is used to drive the lifting linkage component 7 and the retaining frame 5 to move upward, and has high transmission consistency, and there is no elastic sliding problem. The fixed ring 804 is fixed on the chain 803 and is located at the center of the outer chain plate. It will not affect the movement of the chain 803. Its purpose is to facilitate the lifting of the clamping component 702. Its shape includes but is not limited to round, square or convex.

[0059] The clamping assembly 702 includes a receiving groove 7021 provided in the support frame 701. A clamping block 7023 is slidably provided in the receiving groove 7021 and is in contact with the fixing ring 804. A first spring 7022 is provided between the clamping block 7023 and the receiving groove 7021. The top of the clamping block 7023 is vertically sectioned with an inclined surface.

[0060] like Figure 9 As shown, by setting the card block 7023 and the first spring 7022, the first spring 7022 applies an outward thrust to the card block 7023, so that the card block 7023 can extend out of the storage groove 7021 and then fit with the fixing ring 804, and its top is provided with an inclined surface that cooperates with the pushing frame 7033, so that when the pushing frame 7033 is extended horizontally, it will push the card block 7023 back into the storage groove 7021, so that it can achieve the effect of separation from the fixing ring 804. It should be further explained that when the pushing frame 7033 is extended, its side will resist the card block 7023, so that the first spring 7022 cannot drive the card block 7023 to pop out.

[0061] The trigger assembly 703 includes a gear 7031 that rotates within the through-hole 704 and is located between the upper trigger rack 16 and the lower trigger rack 15. A horizontal rack 7032 is meshed below the gear 7031. A push frame 7033 is located below the horizontal rack 7032 and is in contact with the top inclined surface of the block 7023.

[0062] like Figure 9 、 Figure 10 As shown, by setting the gear 7031 and the horizontal rack 7032, when the gear 7031 is engaged with the upper trigger rack 16, the gear 7031 will rotate counterclockwise and drive the pushing frame 7033 to extend through the horizontal rack 7032, so that the pushing frame 7033 squeezes the block 7023 into the storage groove 7021, thereby achieving the purpose of automatically unlocking the lifting linkage component 7 after it reaches the top; when the gear 7031 contacts the lower trigger rack 15, the gear 7031 will rotate clockwise and drive the pushing frame 7033 to retract through the horizontal rack 7032, so that the block 7023 loses the resistance of the pushing frame 7033, and then pops out under the push of the first spring 7022, thereby achieving the purpose of automatically locking the lifting linkage component 7 after it reaches the bottom.

[0063] The lower trigger rack 15 includes a first rack 1501 that passes through the base 1. A slot 1502 is formed on the side of the first rack 1501. The slot 1502 is engaged with a slider 1503 fixed to the base 1. A second spring 1504 is provided below the first rack 1501 and connected to the interior of the base 1.

[0064] like Figure 6 As shown, by setting the slider 1503 and the second spring 1504, when the retaining frame 5 drives the lifting linkage component 7 to fall, the speed of the lifting linkage component 7 is faster. At this time, the first rack 1501 will be impacted and move downward along the slider 1503 to offset the impact of the lifting linkage component 7 and avoid excessive collision and damage to the structure. When the position of the lifting linkage component 7 is stable, the second spring 1504 will use its own elastic force to drive the first rack 1501 to reset upward, so that the first rack 1501 engages with the gear 7031 in the lifting linkage component 7, thereby triggering its locking purpose.

[0065] The impact component 13 includes a centering plate 1303 provided at the bottom of the retaining frame 5. The centering plate 1303 is connected to the retaining frame 5 via bolts 1302. A hammer head 1301 is vertically slidably provided in the centering plate 1303. The hammer head 1301 has built-in standard speed sensors and calibrated speed sensors.

[0066] like Figure 7 As shown, by setting a centering plate 1303, the centering plate 1303 is fixedly connected to the retaining frame 5 by means of bolts 1302, and at the same time slides with the hammer head 1301, so that after the hammer head 1301 is fitted with the impact table 2, the hammer head 1301 can utilize the sliding cooperation with the centering plate 1303 to avoid transmitting the impact force to the retaining frame 5, thereby ensuring the stability and safety of the retaining frame 5.

[0067] Permanent magnets 14 are provided on both sides of the holder 5. An electromagnetic acceleration component 11 is provided under the top plate 9 to accelerate the holder 5 using the permanent magnets 14. The electromagnetic acceleration component 11 includes a connecting frame 1101 provided under the top plate 9. A control mainboard 1102 is provided vertically downward within the connecting frame 1101. Capacitor coils 1103 having opposite magnetic properties to the permanent magnets 14 are equidistantly provided within the control mainboard 1102.

[0068] like Figure 3 、 Figure 8As shown, by setting a permanent magnet 14 and an electromagnetic acceleration component 11, the electromagnetic acceleration component 11 is provided with capacitor coils 1103 at equal intervals. When working, the capacitor coils 1103 enter the pulse excitation state from top to bottom, so that they generate instantaneous magnetism, and use magnetic traction to pull the permanent magnet 14, so that the permanent magnet 14 drives the retaining frame 5 to move downward quickly. In this way, the falling speed of the retaining frame 5 can be increased, so that the device can be used to detect some impact acceleration sensors with a larger range of values without increasing its own height. In addition, it should be further explained that the electromagnetic acceleration principle is an existing mature technology, and the speed can be controlled by the size of the release current.

[0069] The machine base 1 is provided with a damping component 3 that is in contact with the retaining frame 5. The damping component 3 includes a liquid damper 301 provided on the machine base 1. The liquid damper 301 is provided with a rubber pad 302 that is in contact with the retaining frame 5.

[0070] like Figure 5 As shown, by providing a liquid damper 301 and a rubber pad 302, when the retaining frame 5 falls to the bottom, the liquid damper 301 can buffer and absorb the impact force of the retaining frame 5, thereby achieving the purpose of stabilizing the equipment, while the rubber pad 302 can avoid hard contact between the liquid damper 301 and the retaining frame 5, thereby preventing the two from being damaged by collision.

[0071] Working principle: The lifting drive component 8 uses the lifting linkage component 7 to lift the holder 5 upward. When it is lifted to the top, the permanent magnet electromagnet 1002 uses its original magnetic force to attract the ferromagnetic metal plate 1202 and uses the fixing frame 1201 to fix the holder 5. At the same time, the upper trigger rack 16 triggers the lifting linkage component 7, separating it from the lifting drive component 8.

[0072] During operation, the permanent magnet electromagnet 1002 is energized to offset the original magnetic field, causing the ferromagnetic metal plate 1202 to lose its adsorption and fixation. At this time, the retaining frame 5 uses the sliding sleeve 4 to fall along the sliding rod 6, and drives the impact component 13 to fall onto the impact platform 2, so that the standard speed sensor and the calibrated speed sensor in the impact component 13 detect data.

[0073] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all included in the scope of protection of the present invention.

Claims

1. A drop-type impact calibration device, comprising a base (1), characterized in that: The machine base (1) is provided with four slide bars (6), the top of each slide bar (6) is provided with a top plate (9), a slide sleeve (4) is provided on each slide bar (6), a retaining frame (5) is provided between each slide sleeve (4), an impact component (13) with a built-in standard speed sensor and a calibrated speed sensor is provided at the center position of the lower portion of the retaining frame (5), a fixing component (12) is provided at the center position of the upper portion, an impact platform (2) is provided at a position corresponding to the impact component (13) on the machine base (1), and an electromagnetic adsorption component (10) is provided at a position corresponding to the fixing component (12) on the top plate (9); The electromagnetic adsorption component (10) comprises a fixed plate (1001) provided on the top plate (9), a permanent magnet electromagnet (1002) penetrating the top plate (9) is provided in the fixed plate (1001), and a connection port (1003) for power supply is provided on the permanent magnet electromagnet (1002); The fixing component (12) comprises a fixing frame (1201) provided on the retaining frame (5), wherein the fixing frame (1201) is provided with a ferromagnetic metal plate (1202) that generates magnetic attraction with the permanent magnet electromagnet (1002); A lifting drive component (8) is provided between the machine base (1) and the top plate (9), lifting linkage components (7) linked to the lifting drive component (8) are provided on both sides of the retaining frame (5), an upper trigger rack (16) for triggering the lifting linkage component (7) to separate from the lifting drive component (8) is provided under the top plate (9), and a lower trigger rack (15) for triggering the lifting linkage component (7) to fit with the lifting drive component (8) is provided on the machine base (1).

2. The falling impact calibration device according to claim 1, characterized in that: The lifting linkage component (7) comprises a support frame (701) fixedly connected to the retaining frame (5), a clamping assembly (702) that is in contact with the lifting drive component (8) and a trigger assembly (703) that changes the state of the clamping assembly (702) are slidably provided in the support frame (701), and a vertical through-hole (704) is provided in the support frame (701) at a position corresponding to the trigger assembly (703).

3. The falling impact calibration device according to claim 2, characterized in that: The lifting drive component (8) includes a reduction motor (802) arranged in the machine base (1), the output end of the reduction motor (802) is provided with a driving wheel (801), the top plate (9) is provided with a driven wheel (805), a chain (803) is provided between the driving wheel (801) and the driven wheel (805), and fixed rings (804) that cooperate with the clamping assembly (702) are equidistantly provided on the chain (803).

4. The falling impact calibration device according to claim 2, characterized in that: The clamping assembly (702) comprises a receiving groove (7021) provided in the support frame (701), a clamping block (7023) slidingly provided in the receiving groove (7021) and in contact with the fixing ring (804), a first spring (7022) being provided between the clamping block (7023) and the receiving groove (7021), and a top of the clamping block (7023) being vertically sectioned with an inclined surface.

5. The falling impact calibration device according to claim 4, characterized in that: The trigger assembly (703) includes a gear (7031) that rotates in the through-hole (704), and the gear (7031) is located between the upper trigger rack (16) and the lower trigger rack (15). A horizontal rack (7032) is meshed below the gear (7031), and a push frame (7033) is provided below the horizontal rack (7032) that is in contact with the top inclined surface of the block (7023).

6. The falling impact calibration device according to claim 1, characterized in that: The lower trigger rack (15) includes a first rack (1501) that passes through the machine base (1), a sliding groove (1502) is provided on the side of the first rack (1501), and the sliding groove (1502) is used to cooperate with a slider (1503) fixed on the machine base (1), and a second spring (1504) connected to the inside of the machine base (1) is provided under the first rack (1501).

7. The falling impact calibration device according to claim 1, characterized in that: The impact component (13) comprises a centering plate (1303) provided at the bottom of the retaining frame (5), the centering plate (1303) being connected to the retaining frame (5) via a bolt (1302), and a hammer head (1301) being provided in the centering plate (1303) for vertical sliding movement, the hammer head (1301) having a built-in standard speed sensor and a calibrated speed sensor.

8. The falling impact calibration device according to claim 1, characterized in that: Permanent magnets (14) are provided on both sides of the retaining frame (5), and an electromagnetic acceleration component (11) is provided under the top plate (9) for providing acceleration for the retaining frame (5) using the permanent magnets (14).

9. The falling impact calibration device according to claim 8, characterized in that: The electromagnetic acceleration component (11) comprises a connecting frame (1101) provided under the top plate (9), a control mainboard (1102) vertically downwardly provided in the connecting frame (1101), and capacitor coils (1103) with opposite magnetic properties to the permanent magnet (14) provided equidistantly in the control mainboard (1102).

10. The falling impact calibration device according to claim 1, characterized in that: The machine base (1) is provided with a damping component (3) that is in contact with the retaining frame (5), and the damping component (3) includes a liquid damper (301) provided on the machine base (1), and a rubber pad (302) that is in contact with the retaining frame (5) is provided on the liquid damper (301).

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