Acceleration sensor calibration device

Abstract

The utility model relates to the technical field of calibration devices, and discloses an acceleration sensor calibration device, which comprises a support plate, a standard force sensor, two hydraulic cylinders, a drop hammer, four guide columns and a sensor to be calibrated, and is characterized in that one side of the drop hammer far away from the standard force sensor is fixedly connected with a plurality of support rods; the other ends of the multiple supporting rods are fixedly connected with a magnetic frame at the same time, the outer walls of the four guide columns are sleeved with and slidably connected with a lifting plate at the same time, the upper surface of the lifting plate is connected with a transmission mechanism, the output end of the transmission mechanism is connected with a winding assembly, and the outer wall of the winding assembly is connected with a pull rope. According to the acceleration sensor calibration device, when a user repeatedly calibrates the to-be-calibrated sensor for multiple times, the transmission mechanism can control the winding and unwinding of the winding assembly so as to control the lifting of the electromagnetic plate, so that the electromagnetic plate can attract the magnetic frame to drive the magnetic frame to lift, the time for reinstalling and clamping the to-be-calibrated sensor can be saved, and the calibration efficiency is improved. And the test efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration devices, in particular to an acceleration sensor calibration device. Background Art

[0002] An accelerometer is an electronic device that can sense and measure acceleration. It can convert the acceleration changes in physical motion into usable electrical signal outputs. In order to ensure the accuracy and reliability of the measurement results of the accelerometer, a device dedicated to detecting and adjusting the performance of the accelerometer is often required.

[0003] At present, the patent with announcement number CN215375474U discloses an acceleration sensor calibration device, including a support plate, a hydraulic cylinder, a guide plate and a guide column, the surface of the support plate is symmetrically fixed with two hydraulic cylinders by bolts, the surface of the hydraulic cylinder is fixed with a guide plate by bolts, the left outer wall of the guide plate is fixed with a drive motor by bolts, the bottom of the guide plate is provided with a guide groove, the guide groove of the guide plate is rotatably connected with a drive shaft by a welded bearing, the drive shaft is fixedly connected with the output shaft of the drive motor through a coupling, the outer wall of the drive shaft is provided with two groups of thread grooves, the outer wall of the drive shaft is threadedly connected with two connecting frames, the surface of the support plate is symmetrically welded and fixed with four guide columns, and the guide plate slides outside the guide column through the provided guide hole. The acceleration sensor calibration device has simple structure, convenient operation and high calibration accuracy.

[0004] However, the above-mentioned acceleration sensor calibration device still has the following problems:

[0005] Although the above-mentioned acceleration sensor calibration device can support the drop weight through two connecting frames, and then move the two connecting frames apart through the driving shaft, so that the drop weight can fall freely to collide with the standard force sensor below, thereby obtaining relevant data, the experiment often needs to be repeated many times. When conducting the second experiment, it is necessary to manually slide the drop weight upward, and then move the connecting frame to the bottom of the drop weight through the driving shaft to support the drop weight again. The overall operation is very cumbersome, which reduces the experimental efficiency. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an acceleration sensor calibration device. When the user repeatedly calibrates the sensor to be calibrated, the transmission mechanism can be used to control the retraction and extension of the winding assembly to control the lifting and lowering of the electromagnetic plate, so that the magnetic frame can be adsorbed and driven to lift and lower by the electromagnetic plate, thereby saving the time for reinstalling and clamping the sensor to be calibrated, making the test more efficient.

[0007] The utility model provides the following technical solutions: an acceleration sensor calibration device, comprising a support plate, a standard force sensor, two hydraulic cylinders, a drop hammer, four guide columns and a sensor to be calibrated, wherein a side of the drop hammer away from the standard force sensor is fixedly connected to a plurality of support rods, the other ends of the plurality of support rods are simultaneously fixedly connected to a magnetic frame, the outer walls of the four guide columns are simultaneously sleeved with and slidably connected to a lifting plate, the upper surface of the lifting plate is connected to a transmission mechanism, the output end of the transmission mechanism is connected to a winding assembly, the outer wall of the winding assembly is connected to a pull rope, the other end of the pull rope passes through the lifting plate and is connected to an electromagnetic plate, the electromagnetic plate is magnetically connected to the magnetic frame, and the two sides of the bottom surface of the lifting plate are respectively fixedly connected to the output ends of the two hydraulic cylinders.

[0008] Furthermore, the transmission mechanism includes a winding motor and a support, the bottom surface of the support is fixedly connected to the upper surface of the lifting plate, the other end of the support is fixedly connected to the outer wall of the winding motor, and the output end of the winding motor is connected to the winding assembly.

[0009] Furthermore, the winding assembly includes a support block and a winding roller, the bottom surface of the support block is fixedly connected to the upper surface of the lifting plate, the other end of the support block is sleeved and rotatably connected to the outer wall of one end of the winding roller, and the other end of the winding roller is fixedly connected to the output shaft of the winding motor.

[0010] Furthermore, side plates are sleeved and fixedly connected to both ends of the outer wall of the winding roller. The two side plates are located between the support block and the winding motor and on both sides of the pull rope.

[0011] Furthermore, a touch plate is fixedly connected to one side of the outer wall of the electromagnetic plate, a mounting plate is fixedly connected to one side of the outer wall of the magnetic frame, a mounting hole is penetrated through the upper surface of the lifting plate, and touch sensors are fixedly connected to the inner walls of the mounting plate and the mounting hole, and the two touch sensors are respectively abutted against the upper and lower sides of the touch plate.

[0012] Furthermore, four sliding blocks are fixedly connected to the outer wall of the electromagnetic plate, and the four sliding blocks are respectively sleeved and slidably connected to the outer walls of the four guide pillars.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The acceleration sensor calibration device is provided with a lifting plate above the drop weight, a transmission mechanism, a winding assembly, a pull rope and an electromagnetic plate on the lifting plate, and a magnetic frame matching the electromagnetic plate is provided on the drop weight. When the user repeatedly calibrates the sensor to be calibrated, the transmission mechanism can be used to control the retraction and extension of the winding assembly to control the lifting and lowering of the electromagnetic plate, so that the magnetic frame can be adsorbed and driven to lift and lower by the electromagnetic plate, thereby saving the time of reinstalling and clamping the sensor to be calibrated, making the test efficiency higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall appearance of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall appearance of the lifting plate of the utility model after being cut open;

[0017] Figure 3 It is a partial cross-sectional schematic diagram of the lifting plate in the utility model;

[0018] Figure 4 It is a detailed connection diagram of the transmission mechanism, winding assembly, electromagnetic plate and other components in the utility model;

[0019] Figure 5 For this utility model Figure 4 Exploded diagram of the various components.

[0020] In the figure: 1. support plate; 2. standard force sensor; 3. hydraulic cylinder; 4. drop weight; 5. guide column; 6. lifting plate; 7. touch sensor; 8. support; 9. winding motor; 10. side plate; 11. support block; 12. pull rope; 13. winding roller; 14. electromagnetic plate; 15. slider; 16. touch plate; 17. magnetic frame; 18. support rod; 19. mounting plate; 20. sensor to be calibrated; 601, mounting hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] See also Figure 1-Figure 5 A calibration device for an acceleration sensor comprises a support plate 1, a standard force sensor 2, two hydraulic cylinders 3, a drop hammer 4, four guide columns 5 and a sensor 20 to be calibrated, wherein a side of the drop hammer 4 away from the standard force sensor 2 is fixedly connected to a plurality of support rods 18, and the other ends of the plurality of support rods 18 are simultaneously fixedly connected to a magnetic frame 17, and the outer walls of the four guide columns 5 are simultaneously sleeved with and slidably connected to a lifting plate 6, and a transmission mechanism is connected to the upper surface of the lifting plate 6, and a winding component is connected to the output end of the transmission mechanism, and a pull rope 12 is connected to the outer wall of the winding component, and the other end of the pull rope 12 passes through the lifting plate 6 and is connected to an electromagnetic plate 14, and the electromagnetic plate 14 is magnetically connected to the magnetic frame 17, and the two sides of the bottom surface of the lifting plate 6 are respectively fixedly connected to the output ends of the two hydraulic cylinders 3.

[0023] The acceleration sensor calibration device in the utility model is similar in structure to the existing acceleration sensor calibration device, such as the acceleration sensor calibration device disclosed in the patent with publication number CN215375474U. Figures 1 to 5As shown, when the acceleration sensor calibration device in the present invention calibrates the sensor 20 to be calibrated for the first time, it only needs to close the electromagnetic plate 14 through the external controller. After the electromagnetic plate 14 is disconnected, the magnetic attraction between the electromagnetic plate 14 and the magnetic frame 17 is disconnected. At this time, the magnetic frame 17, a plurality of support rods 18, the sensor 20 to be calibrated and the drop hammer 4 will perform free fall motion due to their own gravity until the sensor 20 to be calibrated contacts with the standard force sensor 2 and stops after obtaining the value. Then, after the transmission mechanism is started by the external controller, the output end will drive the winding assembly to rotate, thereby realizing the lowering of the pull rope 12, so that The electromagnetic plate 14 is controlled to descend, and during the descent of the electromagnetic plate 14, the electromagnetic plate 14 is started again by an external controller. When the electromagnetic plate 14 descends to contact or is about to contact the magnetic frame 17, the magnetic frame 17 can be sucked up, and then the transmission mechanism is controlled to reverse, so that the magnetic frame 17 can be pulled upward, and then the several support rods 18 under the magnetic frame 17, the sensor 20 to be calibrated and the drop hammer 4 can be pulled up together until they reach a specified height and stop. Then, the above operation is repeated, and the experiment can be repeated multiple times. Through the above steps, the time for reinstalling the clamped sensor 20 to be calibrated can be saved, so that the test efficiency is higher.

[0024] Special mention should be made here:

[0025] The above-mentioned support plate 1, standard force sensor 2, two hydraulic cylinders 3, drop hammer 4, four guide columns 5 and sensor to be calibrated 20 are all prior arts in the comparative document CN215375474U, so they are not described in detail.

[0026] The external controller is a very mature technology at present, so it will not be described in detail.

[0027] The magnetic attraction principle of the electromagnetic plate 14 is a prior art, so it will not be described in detail.

[0028] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 The transmission mechanism includes a winding motor 9 and a support 8. The bottom surface of the support 8 is fixedly connected to the upper surface of the lifting plate 6. The other end of the support 8 is fixedly connected to the outer wall of the winding motor 9. The output end of the winding motor 9 is connected to the winding assembly.

[0029] More specifically, when it is necessary to control the lifting of the electromagnetic plate 14, it is only necessary to start the winding motor 9 through an external controller. After the winding motor 9 is started, its output shaft can drive the winding assembly to rotate, thereby driving the electromagnetic plate 14 to be lifted and lowered through the pull rope 12.

[0030] Please refer to Figure 1 , Figure 2 , Figure 4and Figure 5 The winding assembly includes a support block 11 and a winding roller 13. The bottom surface of the support block 11 is fixedly connected to the upper surface of the lifting plate 6. The other end of the support block 11 is sleeved and rotatably connected to the outer wall of one end of the winding roller 13. The other end of the winding roller 13 is fixedly connected to the output shaft of the winding motor 9.

[0031] More specifically, when the winding motor 9 is started, the output shaft drives the winding roller 13 to rotate, and the other end of the winding roller 13 will not tilt due to the support of the support block 11, so that the pull rope 12 connected to the surface can be rolled up or released during the rotation.

[0032] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 Both ends of the outer wall of the winding roller 13 are sleeved and fixedly connected with side plates 10 . The two side plates 10 are located between the support block 11 and the winding motor 9 , and are located on both sides of the pull rope 12 .

[0033] More specifically, by providing the side plates 10 , it is possible to prevent the pull cord 12 from falling off the two ends of the winding roller 13 , or the pull cord 12 from being too dispersed when being wound on the surface of the winding roller 13 .

[0034] Please refer to Figure 2 , Figure 4 and Figure 5 A touch plate 16 is fixedly connected to one side of the outer wall of the electromagnetic plate 14, a mounting plate 19 is fixedly connected to one side of the outer wall of the magnetic frame 17, a mounting hole 601 is penetrated through the upper surface of the lifting plate 6, and the inner walls of the mounting plate 19 and the mounting hole 601 are fixedly connected with touch sensors 7, and the two touch sensors 7 are respectively against the upper and lower sides of the touch plate 16.

[0035] More specifically, by providing the touch plate 16, the mounting plate 19 and the two touch sensors 7, when the electromagnetic plate 14 rises or falls, when the touch plate 16 contacts the touch sensor 7, the touch sensor 7 quickly transmits an electrical signal to the external processor, and then the winding motor 9 is turned off via the external controller, thereby preventing the winding motor 9 from over-winding and causing the pull rope 12 to be broken. It should be noted here that the external processor is one of the common technologies currently, so it will not be described in detail.

[0036] Please refer to Figure 2 , Figure 4 and Figure 5 Four sliders 15 are fixedly connected to the outer wall of the electromagnetic plate 14 , and the four sliders 15 are respectively sleeved and slidably connected to the outer walls of the four guide pillars 5 .

[0037] More specifically, by providing the slider 15 , the electromagnetic plate 14 will not be tilted or rotated during the lifting and lowering without affecting the normal lifting and lowering of the electromagnetic plate 14 .

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An acceleration sensor calibration device, comprising a support plate (1), a standard force sensor (2), two hydraulic cylinders (3), a drop weight (4), four guide columns (5) and a sensor to be calibrated (20), characterized in that: A plurality of support rods (18) are fixedly connected to one side of the drop weight (4) away from the standard force sensor (2); the other ends of the plurality of support rods (18) are simultaneously fixedly connected to a magnetic frame (17); the outer walls of the four guide columns (5) are simultaneously sleeved with and slidably connected to a lifting plate (6); the upper surface of the lifting plate (6) is connected to a transmission mechanism; the output end of the transmission mechanism is connected to a winding assembly; the outer wall of the winding assembly is connected to a pull rope (12); the other end of the pull rope (12) passes through the lifting plate (6) and is connected to an electromagnetic plate (14); the electromagnetic plate (14) is magnetically connected to the magnetic frame (17); and the two sides of the bottom surface of the lifting plate (6) are respectively fixedly connected to the output ends of the two hydraulic cylinders (3).

2. The acceleration sensor calibration device according to claim 1, characterized in that: The transmission mechanism comprises a winding motor (9) and a support (8), the bottom surface of the support (8) is fixedly connected to the upper surface of the lifting plate (6), the other end of the support (8) is fixedly connected to the outer wall of the winding motor (9), and the output end of the winding motor (9) is connected to the winding assembly.

3. The acceleration sensor calibration device according to claim 2, characterized in that: The winding assembly comprises a support block (11) and a winding roller (13); the bottom surface of the support block (11) is fixedly connected to the upper surface of the lifting plate (6); the other end of the support block (11) is sleeved on and rotatably connected to the outer wall of one end of the winding roller (13); and the other end of the winding roller (13) is fixedly connected to the output shaft of the winding motor (9).

4. The acceleration sensor calibration device according to claim 3, characterized in that: Side plates (10) are sleeved and fixedly connected to both ends of the outer wall of the winding roller (13); the two side plates (10) are located between the support block (11) and the winding motor (9), and are located on both sides of the pull rope (12).

5. An acceleration sensor calibration device according to claim 1, 2, 3 or 4, characterized in that: A touch plate (16) is fixedly connected to one side of the outer wall of the electromagnetic plate (14), a mounting plate (19) is fixedly connected to one side of the outer wall of the magnetic frame (17), a mounting hole (601) is provided through the upper surface of the lifting plate (6), and touch sensors (7) are fixedly connected to the inner walls of the mounting plate (19) and the mounting hole (601), and the two touch sensors (7) are respectively abutted against the upper and lower sides of the touch plate (16).

6. An acceleration sensor calibration device according to claim 1, 2, 3 or 4, characterized in that: Four sliding blocks (15) are fixedly connected to the outer wall of the electromagnetic plate (14), and the four sliding blocks (15) are respectively sleeved and slidably connected to the outer walls of the four guide pillars (5).

7. The acceleration sensor calibration device according to claim 5, characterized in that: Four sliding blocks (15) are fixedly connected to the outer wall of the electromagnetic plate (14), and the four sliding blocks (15) are respectively sleeved and slidably connected to the outer walls of the four guide pillars (5).

Images