An automatic pressure gauge calibration system

Abstract

The present application relates to pressure gauge calibration technical field, provide a kind of pressure gauge automatic calibration system, including workbench, pressure gauge fixed seat, three-dimensional linear motion mechanism, disc spring pre-tightening mechanism, connecting rod A point clamping mechanism, connecting rod B point clamping mechanism, gas supply system, vision system and control system, pass through three-dimensional linear motion mechanism and drive pressure gauge circulation between different workstations, utilize vision system real-time reading pointer indication and identify connecting rod position, cooperate disc spring pre-tightening mechanism, connecting rod A point clamping mechanism and connecting rod B point clamping mechanism respectively to the disc spring pre-tightening of pressure gauge, full-scale adjustment and half-scale linear adjustment are carried out automatic operation, the present application realizes the full automation of pressure gauge calibration process, without manual intervention, solve the problem of low efficiency, labor intensity, unstable precision in prior art calibration, significantly improve production efficiency and product quality.

Description

Technical Field

[0001] This invention relates to the field of pressure gauge calibration technology, and in particular to an automatic pressure gauge calibration system. Background Technology

[0002] Pressure gauges are extremely common field instruments in industrial production. Statistics show that my country produces approximately 400-500 million pressure gauges annually in the refrigeration industry alone. The most common pressure gauge structure is as follows: the Bourdon tube deforms under pressure, pulling the pointer via a connecting rod, allowing the pressure value to be read from the dial. However, the accuracy of the indicated pressure value depends not only on the elastic properties of the Bourdon tube itself but also on pressure calibration during the gauge manufacturing process. This calibration involves adjusting the ratio and linearity of the entire pressure gauge system to ensure the indicated pressure matches the actual pressure within a certain range. Inside a pressure gauge, there are generally two adjustable points for calibration. Point B, closer to the Bourdon tube, is typically used to calibrate linearity, while point A on the sector gear is used to adjust the ratio. Figure 8 As shown.

[0003] For example, application number CN201810771710.2 discloses a method for calibrating the accuracy of a pressure gauge core, which includes a pressure gauge core. One end of the connecting rod of the pressure gauge core is connected to a fixed connecting arm, and the other end of the connecting rod is connected to a plate. The end of the plate is connected to a gear transmission arm. A hole is drilled in real time on the plate according to the position of the end of the fixed connecting arm and the displacement under a given pressure. The drilled hole is used to hinge the connecting rod. The real-time positioning drilling on the plate includes the following steps: A. Measuring the deformation of the connecting arm under a given pressure using a visual sensor; B. Calculating the position of the connecting hole on the plate according to the deformation; C. Drilling the hole at the position of the connecting hole determined in step B, and then installing the connecting rod.

[0004] However, the pressure gauge calibration process mainly relies on skilled technicians, which requires highly skilled personnel. Furthermore, the current automated equipment has a low degree of automation and cannot perform full-scale calibration of pressure gauges in batches. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an automatic pressure gauge calibration system.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An automatic pressure gauge calibration system includes: a workbench, a pressure gauge mounting base, a three-way linear motion mechanism, a coil spring preload mechanism, a link A-point clamping mechanism, a link B-point clamping mechanism, an air supply system, a vision system, and a control system. The three-way linear motion mechanism is mounted on the workbench, the pressure gauge mounting base is mounted on the drive end of the three-way linear motion mechanism, and the pressure gauge is mounted on the pressure gauge mounting base. The coil spring preload mechanism, the link A-point clamping mechanism, and the link B-point clamping mechanism are positioned along the motion path of the pressure gauge mounting base for adjusting the pressure gauge. The air supply system and the control system are located at the bottom of the workbench. The air supply system is connected to the three-way linear motion mechanism, the coil spring preload mechanism, the link A-point clamping mechanism, and the link B-point clamping mechanism. The control system is electrically connected to the three-way linear motion mechanism, the coil spring preload mechanism, the link A-point clamping mechanism, the link B-point clamping mechanism, and the vision system. The vision system is positioned along the motion path of the pressure gauge mounting base and is fixedly connected to the workbench.

[0007] Preferably, the pressure gauge mounting base includes: a mounting plate, a support base, a side clamping block, a side clamping drive cylinder, an air passage block, a rocker arm, a slide bar, a slide bar drive cylinder, and a cylinder mounting base. The mounting plate is fixedly mounted on the drive end of the three-way linear motion mechanism. The support base is fixedly mounted on the front side of the mounting plate. The pressure gauge is mounted on the support base. The side clamping block is mounted on one side of the pressure gauge and works in conjunction with the pressure gauge. The side clamping block is fixedly connected to the drive end of the side clamping drive cylinder. The side clamping drive cylinder is fixedly mounted on the cylinder mounting base. The cylinder mounting base is fixedly mounted on one side of the support base. The air passage block is slidably mounted on the lower side of the support base. The air source is connected to the pressure gauge inlet through the air passage block. The slide bar extends into the air passage block and works in conjunction with the rocker arm located inside the air passage block. The upper end of the rocker arm is rotatably connected to the air passage block, and the lower end of the rocker arm abuts against the slide bar. The slide bar is hinged to the drive end of the slide bar drive cylinder fixedly mounted on the cylinder mounting base.

[0008] Preferably, the three-axis linear motion mechanism includes: an X-axis linear drive mechanism, a Y-axis linear drive mechanism, and a Z-axis linear drive mechanism. The X-axis linear drive mechanism adopts a lead screw and nut drive structure, while the Y-axis and Z-axis linear drive mechanisms adopt a cylinder drive structure.

[0009] Preferably, the coil spring preload mechanism includes: a first gripper cylinder, a first worm gear turntable, a cross-slot connector, and a first gripper. The first worm gear turntable is fixedly connected to the worktable, the first gripper cylinder is connected to the drive end of the first worm gear turntable through the cross-slot connector, and the first gripper is disposed at the drive end of the first gripper cylinder.

[0010] Preferably, the clamping mechanism at point A of the connecting rod includes: a support base, a second gripper cylinder, and a second gripper. The support base is fixedly installed on the workbench, the second gripper cylinder is fixedly installed on the support base, and the second gripper is located at the drive end of the second gripper cylinder.

[0011] Preferably, the connecting rod point B clamping mechanism includes: a second worm gear turntable, a rotary mounting base, a fixed gripper, a movable gripper, a movable gripper drive cylinder, and a gripper fixing base. The second worm gear turntable is fixedly mounted on the workbench, the rotary mounting base is fixedly mounted on the second worm gear turntable, the gripper fixing base is fixedly mounted on the upper part of the rotary mounting base, the fixed gripper is fixedly mounted on the upper part of the gripper fixing base, the movable gripper is movably mounted on one side of the fixed gripper and cooperates with the fixed gripper, and the lower end of the movable gripper is hinged to the drive end of the movable gripper drive cylinder fixedly mounted on one side of the rotary mounting base.

[0012] Preferably, the vision system includes: a pointer reading vision system and a pressure gauge linkage position recognition vision system, wherein the pointer reading vision system is positioned above the movement path of the pressure gauge mounting base, and the pressure gauge linkage position recognition vision system is positioned below the movement path of the pressure gauge mounting base.

[0013] An operating method for an automatic pressure gauge calibration system includes the following steps: S1: Place the pressure gauge to be calibrated in the pressure gauge holder; S2: Start the three-way linear motion mechanism to send the pressure gauge to the disc spring pre-tightening mechanism to pre-tighten the disc spring; S3: The vision system obtains the initial position of the pressure gauge pointer; S4: Use the air supply system to connect the pressure gauge to the full-scale pressure and check whether the pressure gauge pointer reading reaches the full scale. If it is not within the full scale range, use the linkage A-point clamping mechanism to adjust point A of the pressure gauge so that the pressure gauge pointer indicates the full scale. S5: Use the air supply system to connect the pressure gauge to a half-range air supply and check if the pressure gauge pointer indicates 1 / 2 range. If not, use the linkage B-point clamping mechanism to adjust the position of point B, and at the same time, fine-tune the position of point A. S6: Repeat the above process until the pointer positions at zero point, full scale, and 1 / 2 scale all meet the standards, then the calibration is complete.

[0014] The advantages of this invention are as follows: by setting up a three-way linear motion mechanism, a coil spring preload mechanism, a clamping mechanism at point A of the connecting rod, a clamping mechanism at point B of the connecting rod, an air source system, a vision system, and a control system, the pressure gauge calibration is fully automated, requiring no manual intervention and significantly reducing labor intensity; by using a vision system to read the readings, the error of manual reading is eliminated, and the calibration accuracy is improved; by designing a dedicated clamping and adjustment mechanism based on the adjustment characteristics of the pressure gauge connecting rod mechanism, the adjustment of points A and B can be completed quickly, solving the adjustment problem in automated calibration. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the pressure gauge mounting base of the present invention; Figure 3 This is a structural schematic diagram of the pressure gauge fixing base concealed mounting plate and support base of the present invention; Figure 4 This is a schematic diagram of the three-way linear motion mechanism of the present invention; Figure 5 This is a schematic diagram of the coil spring preload mechanism of the present invention; Figure 6 This is a schematic diagram of the linkage A-point clamping mechanism of the present invention; Figure 7 This is a schematic diagram of the linkage B-point clamping mechanism of the present invention; Figure 8 This is a diagram showing the position indication of points A and B on the pressure gauge of this invention.

[0016] Explanation of reference numerals in the attached figures: 1. Workbench; 2. Pressure gauge mounting base; 3. Three-way linear motion mechanism; 4. Disc spring preload mechanism; 5. Linkage A-point clamping mechanism; 6. Linkage B-point clamping mechanism; 7. Pressure gauge; 21. Mounting plate; 22. Support base; 23. Side clamping block; 24. Side clamping drive cylinder; 25. Air passage block; 26. Rocker arm; 27. Slide bar; 28. Slide bar drive cylinder; 29. ​​Cylinder mounting base; 31. X-axis linear drive mechanism; 32. Y-axis linear drive mechanism; 33. Z-axis linear drive mechanism; 41. First gripper cylinder; 42. First worm gear turntable; 43. Cross groove connector; 44. First gripper; 51. Support base; 52. Second gripper cylinder; 53. Second gripper; 61. Second worm gear turntable; 62. Rotary mounting base; 63. Fixed gripper; 64. Movable gripper; 65. Movable gripper drive cylinder; 66. Gripper fixing base. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Example 1, combined with Figure 1 Explanation: An automatic pressure gauge calibration system includes: a workbench 1, a pressure gauge mounting base 2, a three-way linear motion mechanism 3, a coil spring preload mechanism 4, a link A-point clamping mechanism 5, a link B-point clamping mechanism 6, an air supply system, a vision system, and a control system. The three-way linear motion mechanism 3 is mounted on the workbench 1, the pressure gauge mounting base 2 is mounted on the drive end of the three-way linear motion mechanism 3, and a pressure gauge 7 is mounted on the pressure gauge mounting base 2. The coil spring preload mechanism 4, the link A-point clamping mechanism 5, and the link B-point clamping mechanism 6 are positioned on the motion path of the pressure gauge mounting base 2 to adjust the pressure gauge 7. The air supply system and the control system are located at the bottom of the workbench 1. The air supply system is connected to the three-way linear motion mechanism 3, the coil spring preload mechanism 4, the link A-point clamping mechanism 5, and the link B-point clamping mechanism 6. The control system is electrically connected to the three-way linear motion mechanism 3, the coil spring preload mechanism 4, the link A-point clamping mechanism 5, the link B-point clamping mechanism 6, and the vision system. The vision system is positioned on the motion path of the pressure gauge mounting base 2 and is fixedly connected to the workbench 1.

[0021] The vision system includes a pointer reading vision system and a pressure gauge linkage position recognition vision system. The pointer reading vision system is positioned above the movement path of the pressure gauge mounting base 2, and the pressure gauge linkage position recognition vision system is positioned below the movement path of the pressure gauge mounting base 2.

[0022] An operating method for an automatic pressure gauge calibration system includes the following steps: S1: Place the pressure gauge 7 to be calibrated on the pressure gauge mounting base 2; S2: Start the three-way linear motion mechanism 3 to send the pressure gauge 7 to the disc spring pre-tightening mechanism 4 to pre-tighten the disc spring; S3: The vision system obtains the initial position of the pointer of pressure gauge 7; S4: Use the air source system to connect the pressure gauge 7 to the full-scale pressure and check whether the pointer reading of the pressure gauge 7 reaches the full scale. If it is not within the full scale range, use the linkage A-point clamping mechanism 5 to adjust point A of the pressure gauge 7 so that the pressure gauge pointer indicates the full scale. S5: Use the air source system to connect the half-range air source to the pressure gauge 7 and check whether the pointer of the pressure gauge 7 indicates 1 / 2 range. If it does not meet the requirement, use the linkage B-point clamping mechanism 6 to adjust the position of point B, and at the same time fine-tune the position of point A. S6: Repeat the above process until the pointer positions at zero point, full scale, and 1 / 2 scale all meet the standards, then the calibration is complete.

[0023] Example 2, based on Example 1, combined with... Figure 2 and Figure 3 Explanation: The pressure gauge mounting base 2 includes: a mounting plate 21, a support base 22, a side clamping block 23, a side clamping drive cylinder 24, an air passage block 25, a rocker arm 26, a slide bar 27, a slide bar drive cylinder 28, and a cylinder mounting base 29. The mounting plate 21 is fixedly mounted on the drive end of the three-way linear motion mechanism 3. The support base 22 is fixedly mounted on the front side of the mounting plate 21. The pressure gauge 7 is mounted on the support base 22. The side clamping block 23 is mounted on one side of the pressure gauge 7 and works in conjunction with the pressure gauge 7. The side clamping block 23 is fixedly mounted to the drive end of the side clamping drive cylinder 24. A fixed connection is established, with the side-clamping drive cylinder 24 fixedly mounted on the cylinder mounting base 29. The cylinder mounting base 29 is fixedly mounted on one side of the support base 22. The air passage block 25 is slidably disposed on the lower side of the support base 22. The air source is connected to the air inlet of the pressure gauge 7 through the air passage block 25. The slide bar 27 extends into the air passage block 25 and cooperates with the rocker arm 26 disposed within the air passage block 25. The upper end of the rocker arm 26 is rotatably connected to the air passage block 25, and the lower end of the rocker arm 26 abuts against the slide bar 27. The slide bar 27 is hinged to the drive end of the slide bar drive cylinder 28 fixedly mounted on the cylinder mounting base 29. In use, when the slide bar 27 moves forward, it can lift the air passage block 25, thereby raising the height of the connector and ensuring that the connector is in close contact with the air inlet of the pressure gauge.

[0024] Example 3, based on Example 2, combined with Figure 4 Explanation: The three-axis linear motion mechanism 3 includes: an X-axis linear drive mechanism 31, a Y-axis linear drive mechanism 32, and a Z-axis linear drive mechanism 33. The X-axis linear drive mechanism 31 adopts a lead screw and nut drive structure, the Y-axis linear drive mechanism 32 adopts a cylinder drive structure, and the Z-axis linear drive mechanism 33 adopts a cylinder drive structure.

[0025] Example 4, based on Example 3, combined with Figure 5 Explanation: The coil spring preload mechanism 4 includes: a first gripper cylinder 41, a first worm gear rotary table 42, a cross-slot connector 43, and a first gripper 44. The first worm gear rotary table 42 is fixedly connected to the worktable 1. The first gripper cylinder 41 is connected to the drive end of the first worm gear rotary table 42 through the cross-slot connector 43. The first gripper 44 is located at the drive end of the first gripper cylinder 41. The cross-slot connector 43 has a cross-slot to compensate for the deviation between the gripper center and the pointer axis of the pressure gauge 7, ensuring the normal operation of the mechanism.

[0026] Example 5, based on Example 4, combined with Figure 6 Explanation: The linkage A-point clamping mechanism 5 includes: a support base 51, a second gripper cylinder 52, and a second gripper 53. The support base 51 is fixedly mounted on the worktable 1, the second gripper cylinder 52 is fixedly mounted on the support base 51, and the second gripper 53 is located at the drive end of the second gripper cylinder 52. The second gripper 53 clamps point A, and the movement of the three-way linear motion mechanism 3 coordinates with this movement to correct point A.

[0027] Example 6, based on Example 5, combined with Figure 7 Explanation: The connecting rod B-point clamping mechanism 6 includes: a second worm gear turntable 61, a rotary mounting base 62, a fixed gripper 63, a movable gripper 64, a movable gripper drive cylinder 65, and a gripper fixing base 66. The second worm gear turntable 61 is fixedly mounted on the workbench 1, the rotary mounting base 62 is fixedly mounted on the second worm gear turntable 61, the gripper fixing base 66 is fixedly mounted on the upper part of the rotary mounting base 62, the fixed gripper 63 is fixedly mounted on the upper part of the gripper fixing base 66, and the movable gripper 64 is movably mounted on one side of the fixed gripper 63 and cooperates with the fixed gripper 63. The lower end of the movable gripper 64 is hinged to the drive end of the movable gripper drive cylinder 65, which is fixedly mounted on one side of the rotary mounting base 62. In use, the fixed gripper 63 and the movable gripper 64 clamp point B, and the second worm gear turntable 61 rotates to twist point B to complete the correction.

[0028] The working principle of this invention is as follows: The calibration result is obtained by feeding back the pointer position of pressure gauge 7 through a vision system. The vision system obtains the actual position and orientation of calibration points A and B of pressure gauge 7. The algorithm automatically calculates calibration parameters based on the deviation indicated by the pressure gauge and transmits them to the control system. The control system drives the actuator to perform calibration according to the given parameters. Before being put into use, this invention requires several pressure gauge samples to allow the system to learn and perform factor matching in the algorithm. Let the displacement of point A for calibration adjustment be L. A The pointer is at full scale due to L A The resulting angular deflection is R A Since point A primarily affects the ratio, then R A Should be with L A The relationship is approximately proportional; the adjustment amount output by the algorithm to the control system should be L. A + T A T A As a systematic compensation value, in this invention, the above-mentioned functional relationship uses multiple sets of pressure gauges, and utilizes multiple sets of data on adjustment and change amounts to regress the corresponding functional relationship R. A =f(L AOnce the maximum input pressure is met and the full-scale indication at point A is adjusted, the device can begin learning point B calibration. Half pressure is supplied to the pressure gauge, and the calibration torsion angle at point B is L. B The pointer thus deflects by an angle of R. B Because R B With L B The relationship is not linear, and an analytical solution cannot be obtained using regression equations with multiple sets of data. This invention employs interpolation to obtain the torsion angle parameter at point B under the desired specific deflection angle, using multiple sets of recorded samples. The torsion angle input to the control system is the torsion angle L obtained through interpolation. B With compensation amount T B In this invention, the calibration process can gradually approach the ideal result through multiple calibrations. If a single calibration fails to meet the target, the calibration process is repeated. In this invention, given an input, the actual output is detected by the vision system, and the difference between the theoretical output result and the actual result can be obtained. The system will then automatically adjust the compensation amount to achieve the optimal parameters.

[0029] For those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention; therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic pressure gauge calibration system, characterized in that, include: The system comprises a workbench (1), a pressure gauge mounting base (2), a three-way linear motion mechanism (3), a coil spring preload mechanism (4), a connecting rod A-point clamping mechanism (5), a connecting rod B-point clamping mechanism (6), an air supply system, a vision system, and a control system. The three-way linear motion mechanism (3) is mounted on the workbench (1), the pressure gauge mounting base (2) is mounted on the drive end of the three-way linear motion mechanism (3), the pressure gauge (7) is mounted on the pressure gauge mounting base (2), and the coil spring preload mechanism (4), the connecting rod A-point clamping mechanism (5), and the connecting rod B-point clamping mechanism (6) are mounted on the pressure gauge mounting base (2). The pressure gauge (7) is adjusted on the motion path of the fixed seat (2). The air source system and control system are set at the bottom of the workbench (1). The air source system is connected to the three-way linear motion mechanism (3), the coil spring pre-tensioning mechanism (4), the connecting rod A-point clamping mechanism (5), and the connecting rod B-point clamping mechanism (6). The control system is electrically connected to the three-way linear motion mechanism (3), the coil spring pre-tensioning mechanism (4), the connecting rod A-point clamping mechanism (5), the connecting rod B-point clamping mechanism (6), and the vision system. The vision system is set on the motion path of the pressure gauge fixed seat (2) and is fixedly connected to the workbench (1).

2. The automatic pressure gauge calibration system according to claim 1, characterized in that, The pressure gauge mounting base (2) includes: a mounting plate (21), a support base (22), a side clamping block (23), a side clamping drive cylinder (24), an air passage block (25), a rocker arm (26), a slide bar (27), a slide bar drive cylinder (28), and a cylinder mounting base (29). The mounting plate (21) is fixedly mounted on the drive end of the three-way linear motion mechanism (3). The support base (22) is fixedly mounted on the front side of the mounting plate (21). The pressure gauge (7) is mounted on the support base (22). The side clamping block (23) is mounted on one side of the pressure gauge (7) and works in conjunction with the pressure gauge (7). The side clamping block (23) drives the side clamping drive cylinder (24). The end is fixedly connected, the side clamping drive cylinder (24) is fixedly installed on the cylinder mounting seat (29), the cylinder mounting seat (29) is fixedly installed on one side of the support seat (22), the air passage block (25) is slidably set on the lower side of the support seat (22), the air source is connected to the air inlet of the pressure gauge (7) through the air passage block (25), the slide bar (27) extends into the air passage block (25) and works with the rocker arm (26) set in the air passage block (25), the upper end of the rocker arm (26) is rotatably connected to the air passage block (25), the lower end of the rocker arm (26) abuts against the slide bar (27), and the slide bar (27) is hinged to the drive end of the slide bar drive cylinder (28) fixedly installed on the cylinder mounting seat (29).

3. The automatic pressure gauge calibration system according to claim 1, characterized in that, The three-axis linear motion mechanism (3) includes: an X-axis linear drive mechanism (31), a Y-axis linear drive mechanism (32), and a Z-axis linear drive mechanism (33). The X-axis linear drive mechanism (31) adopts a lead screw and nut drive structure, the Y-axis linear drive mechanism (32) adopts a cylinder drive structure, and the Z-axis linear drive mechanism (33) adopts a cylinder drive structure.

4. The automatic pressure gauge calibration system according to claim 1, characterized in that, The coil spring preload mechanism (4) includes: a first gripper cylinder (41), a first worm gear turntable (42), a cross groove connector (43), and a first gripper (44). The first worm gear turntable (42) is fixedly connected to the worktable (1). The first gripper cylinder (41) is connected to the drive end of the first worm gear turntable (42) through the cross groove connector (43). The first gripper (44) is located at the drive end of the first gripper cylinder (41).

5. The automatic pressure gauge calibration system according to claim 1, characterized in that, The linkage A-point clamping mechanism (5) includes: a support base (51), a second gripper cylinder (52), and a second gripper (53). The support base (51) is fixedly installed on the workbench (1), the second gripper cylinder (52) is fixedly installed on the support base (51), and the second gripper (53) is located at the drive end of the second gripper cylinder (52).

6. The automatic pressure gauge calibration system according to claim 1, characterized in that, The connecting rod B-point clamping mechanism (6) includes: a second worm gear turntable (61), a rotary mounting base (62), a fixed gripper (63), a movable gripper (64), a movable gripper drive cylinder (65), and a gripper fixing base (66). The second worm gear turntable (61) is fixedly mounted on the workbench (1), the rotary mounting base (62) is fixedly mounted on the second worm gear turntable (61), the gripper fixing base (66) is fixedly mounted on the upper part of the rotary mounting base (62), the fixed gripper (63) is fixedly mounted on the upper part of the gripper fixing base (66), the movable gripper (64) is movably mounted on one side of the fixed gripper (63) and works in cooperation with the fixed gripper (63). The lower end of the movable gripper (64) is hinged to the drive end of the movable gripper drive cylinder (65) fixedly mounted on one side of the rotary mounting base (62).

7. The automatic pressure gauge calibration system according to claim 1, characterized in that, The vision system includes a pointer reading vision system and a pressure gauge linkage position recognition vision system. The pointer reading vision system is positioned above the movement path of the pressure gauge mounting base (2), and the pressure gauge linkage position recognition vision system is positioned below the movement path of the pressure gauge mounting base (2).

8. The operation method of the automatic pressure gauge calibration system according to claims 1-7, comprising the following steps: S1: Place the pressure gauge (7) to be calibrated on the pressure gauge holder (2); S2: Start the three-way linear motion mechanism (3) to send the pressure gauge (7) to the disc spring pre-tightening mechanism (4) to pre-tighten the disc spring; S3: The vision system obtains the initial position of the pointer of the pressure gauge (7); S4: Use the air source system to connect the pressure gauge (7) to the full-scale pressure and check whether the pointer reading of the pressure gauge (7) reaches the full scale. If it is not within the full scale range, use the linkage A-point clamping mechanism (5) to adjust point A of the pressure gauge (7) so that the pressure gauge pointer indicates the full scale. S5: Use the air source system to connect the pressure gauge (7) to the half-range air source, check whether the pointer of the pressure gauge (7) indicates 1 / 2 range. If it does not meet the requirement, use the linkage B-point clamping mechanism (6) to adjust the position of point B, and at the same time fine-tune the position of point A. S6: Repeat the above process until the pointer positions at zero point, full scale, and 1 / 2 scale all meet the standards, then the calibration is complete.

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