Filter altimeter and altimeter method thereof

Abstract

The invention provides a filter altimeter and a height measurement method thereof, and belongs to the technical field of height dimension measurement, the filter altimeter comprises a workbench, the workbench is provided with a longitudinal track, the longitudinal track is provided with a slidable lifting seat, the lifting seat is provided with a measuring arm extending in the transverse direction, and the lifting seat is further provided with an angle adjusting motor connected with the measuring arm. A first pressure sensor and a second pressure sensor which are arranged side by side in the transverse direction are arranged at the bottom of the measuring arm, an adjusting hole is formed in the workbench, a floating base body is arranged in the adjusting hole in a penetrating mode, a groove for containing a filter is formed in the floating base body, and three clamping mechanisms evenly distributed around the adjusting hole are further arranged on the workbench. The working table is provided with three clamping mechanisms, the action points of the clamping mechanisms are located on the same horizontal datum plane of the floating base body, each clamping mechanism is provided with a clamping force sensor, the three clamping mechanisms respond to the downward movement of the measuring arm to clamp the floating base body at three points, and the working table is further provided with three jacking mechanisms which abut against the floating base body.

Description

Technical Field

[0001] This invention relates to the field of height measurement technology, and in particular to a filter height measuring instrument and its height measurement method. Background Technology

[0002] In the processes of filter manufacturing, cleaning, and subsequent installation, installation height is a core parameter, and its accuracy and consistency have a decisive impact on ensuring reliable assembly of the filter in the fluid cavity. Height deviations not only disrupt the uniformity of the fluid channel, leading to local pressure imbalances and abnormal flow rates, but may also cause system pressure fluctuations, and in severe cases, trigger protective shutdowns, causing production line interruptions.

[0003] Currently, the height of filters is commonly measured using contact height gauges or laser displacement sensors. The basic operation involves placing the filter within a groove and reading the displacement data after the measuring arm moves vertically downwards to contact the top surface of the workpiece. However, in practical applications, especially for filters with flange edges or complex contours, this method faces insurmountable limitations: the slight horizontal deviation of the measuring platform, i.e., the groove, due to long-term mechanical vibration or manufacturing tolerances, combined with the random tilting of the filter due to gravity or surface irregularities during placement, creates a spatial attitude error that is difficult to separate.

[0004] Current measuring equipment cannot identify this error caused by the tilt of the reference plane and the non-parallelism of the workpiece's top surface. If this error is directly included in the height data, the measurement result will deviate from the true value. Although some manufacturers have tried to improve accuracy by using independent leveling platforms or pre-calibrating the probe angle, these measures are static implementations before measurement and are disconnected from the actual measurement process. They cannot respond to the uncertainties caused by individual differences in the workpiece and the randomness of its placement during each measurement. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems by providing a filter height measuring instrument and a height measuring method thereof.

[0006] One technical solution of the present invention is a filter height measuring instrument, including a workbench, a longitudinal rail on the workbench, a slidable lifting seat on the longitudinal rail, a measuring arm extending laterally on the lifting seat, an angle adjustment motor connected to the measuring arm on the lifting seat, a first pressure sensor and a second pressure sensor arranged side by side laterally on the bottom of the measuring arm, and the angle adjustment motor adjusting the angle of the measuring arm according to the detection signals of the first pressure sensor and the second pressure sensor. The worktable is provided with an adjustment hole, through which a floating substrate is disposed. The floating substrate has a groove for placing a filter. The worktable is also provided with three clamping mechanisms evenly distributed around the adjustment hole. The action point of each clamping mechanism is located on the same horizontal reference plane of the floating substrate. Each clamping mechanism is equipped with a clamping force sensor. The three clamping mechanisms respond to the downward movement of the measuring arm to form a three-point clamping of the floating substrate. The worktable is also provided with three lifting mechanisms evenly distributed around the adjustment hole and located at the bottom of the groove. The lifting mechanisms abut against the floating substrate. The lifting mechanisms adjust the levelness of the groove according to the difference in the clamping forces at the three points.

[0007] In one embodiment, the clamping mechanism includes a mounting base fixed to the worktable, a guide rod retractably disposed on the mounting base, and a roller rotatably connected to the end of the guide rod. A spring is sleeved on the guide rod, and the clamping force sensor is disposed at one end of the spring.

[0008] In one embodiment, the bottom of the worktable is provided with three mounting slots surrounding the adjustment hole, each mounting slot is located on the same horizontal reference plane, and the mounting base of each clamping mechanism is fixed in the mounting slot.

[0009] In one embodiment, a mounting plate is provided below the workbench, and a ball-and-socket support is provided on the mounting plate. The ball-and-socket support is located directly below the adjustment hole. The bottom of the floating base is a ball-head plunger. The ball-head plunger and the ball-and-socket support are fitted together by a spherical surface to form a universal support structure.

[0010] In one embodiment, the bottom of the workbench is provided with legs, and a transverse reinforcing beam is provided between adjacent legs. The mounting plate and the legs are integrally formed.

[0011] In one embodiment, the bottom of the support leg is provided with a leveling foot.

[0012] In one embodiment, the lifting seat includes two horizontally opposite seat plates, with an adjustment port on each seat plate. The measuring arm is fixed to the adjustment port, which provides space for adjusting the angle of the measuring arm.

[0013] In one embodiment, a pressing groove is provided at the bottom of the measuring arm, and the first pressure sensor and the second pressure sensor are elastically connected in the pressing groove and protrude relative to the bottom of the measuring arm.

[0014] In one embodiment, the end of the lifting mechanism is a leveling ball head, and the bottom of the floating base is provided with a leveling ball socket that matches the leveling ball head.

[0015] Another technical solution of the present invention is a filter height measurement method, based on the filter height measuring instrument described above, including... Workpiece loading step: Place the filter in the groove of the floating substrate; Measuring arm descent triggering step: Control the measuring arm to descend along the longitudinal track to the preset triggering position, triggering the three clamping mechanisms to move synchronously, forming a three-point clamping of the floating base; Clamping force detection step: The real-time clamping force at the three clamping points is obtained through the clamping force sensors described above; Base leveling steps: Compare the clamping forces at three points. If the difference exceeds the first set threshold, control the corresponding lifting mechanism to adjust the level of the floating base according to the force value at each point until the difference of the clamping forces at the three points is less than or equal to the first set threshold. Measuring arm contact step: Control the measuring arm to continue descending, so that the first pressure sensor and the second pressure sensor at its bottom contact the top surface of the filter; Measuring arm leveling steps: Obtain the pressure values ​​of the first pressure sensor and the second pressure sensor. If the difference between them exceeds the second set threshold, control the angle adjustment motor to adjust the angle of the measuring arm until the pressure difference between the two points is less than or equal to the second set threshold. Height measurement steps: After the floating base is level and the measuring arm angle is adjusted, the height of the filter is measured.

[0016] The advantages of this invention compared to the prior art are that the filter height measuring instrument and its height measuring method include a worktable, a longitudinal track, a lifting seat, a measuring arm, an angle adjustment motor, a first pressure sensor and a second pressure sensor, an adjustment hole, a floating base, a groove, a clamping mechanism, a clamping force sensor, a lifting mechanism, etc. The three-point clamping mechanism responds to the downward movement of the measuring arm to form a clamp, the lifting mechanism adjusts the levelness according to the clamping force difference, and the measuring arm angle is adjusted based on the pressure sensor signal. This solves the measurement error caused by the inclination of the reference surface and the non-parallelism of the workpiece top surface. It has the ability to automatically adjust the levelness of the floating base and the angle of the measuring arm to ensure the correctness of the reference surface and the measurement direction at the moment of measurement, thereby significantly improving the accuracy of height measurement. Attached Figure Description

[0017] Figure 1 This is a first structural schematic diagram of a filter height measuring instrument provided in an embodiment of the present invention; Figure 2 A first partial enlarged view of a filter height measuring instrument provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the second structure of the filter height measuring instrument provided in an embodiment of the present invention; Figure 4 A second partial enlarged view of the filter height measuring instrument provided in an embodiment of the present invention; Figure 5 A flowchart illustrating the height measurement method of the filter height measuring instrument provided in this embodiment of the invention.

[0018] In the diagram: 1. Workbench; 2. Longitudinal rail; 3. Lifting seat; 4. Measuring arm; 5. Angle adjustment motor; 6. First pressure sensor; 7. Second pressure sensor; 8. Adjustment hole; 9. Floating base; 10. Groove; 11. Clamping mechanism; 12. Clamping force sensor; 13. Lifting mechanism; 14. Mounting seat; 15. Guide rod; 16. Roller; 17. Spring; 18. Mounting groove; 19. Mounting plate; 20. Ball socket support; 21. Ball head plunger; 22. Support leg; 23. Transverse reinforcing beam; 24. Leveling foot; 25. Seat plate; 26. Adjustment port; 27. Pressing groove; 28. Leveling ball head; 29. ​​Leveling ball socket. Detailed Implementation

[0019] The above and other embodiments and advantages 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.

[0020] In one implementation, such as Figures 1 to 4 As shown.

[0021] This embodiment provides a filter height measuring instrument, which includes a worktable 1, a longitudinal rail 2 on the worktable 1, a slidable lifting seat 3 on the longitudinal rail 2, a measuring arm 4 extending laterally on the lifting seat 3, an angle adjustment motor 5 connected to the measuring arm 4 on the lifting seat 3, a first pressure sensor 6 and a second pressure sensor 7 arranged side by side laterally on the bottom of the measuring arm 4, and the angle adjustment motor 5 adjusting the angle of the measuring arm 4 according to the detection signals of the first pressure sensor 6 and the second pressure sensor 7; an adjustment hole 8 is provided on the worktable 1, and a floating base 9 is inserted through the adjustment hole 8. The body 9 has a groove 10 for placing the filter. The worktable 1 is also provided with three clamping mechanisms 11 evenly distributed around the adjustment hole 8. The action point of each clamping mechanism 11 is located on the same horizontal reference plane of the floating base 9. Each clamping mechanism 11 is equipped with a clamping force sensor 12. The three clamping mechanisms 11 form a three-point clamping of the floating base 9 in response to the downward movement of the measuring arm 4. The worktable 1 is also provided with three lifting mechanisms 13 evenly distributed around the adjustment hole 8 and located at the bottom of the groove 10. The lifting mechanisms 13 abut against the floating base 9. The lifting mechanisms 13 adjust the levelness of the groove 10 according to the difference of the clamping forces at the three points.

[0022] In this embodiment, the filter height measuring instrument includes a worktable 1, which serves as a support platform. A longitudinal rail 2 is provided on the worktable 1 to guide the lifting seat 3 in precise linear motion. The lifting seat 3 can slide along the longitudinal rail 2 and may integrate a drive mechanism, such as a lead screw drive mechanism, to achieve vertical movement of the lifting seat 3. A measuring arm 4 is fixed to the lifting seat 3 and extends laterally. To adjust the angle of the measuring arm 4, an angle adjustment motor 5 is connected to the measuring arm 4. This angle adjustment motor 5 can be a servo motor, directly driving the measuring arm 4 to rotate around its lateral axis. A first pressure sensor 6 and a second pressure sensor 7 are arranged side-by-side at the bottom of the measuring arm 4 to detect local pressure when in contact with the top surface of the filter. When the measuring arm 4 descends and contacts the top surface of the filter, the two pressure sensors generate detection signals. The angle adjustment motor 5 operates based on these signals. For example, if there is a difference in pressure values ​​between the two sensors, the motor drives the adjustment of the angle of the measuring arm 4 until the pressure values ​​of the two sensors converge, thus ensuring that the bottom of the measuring arm 4 remains parallel to the top surface of the filter. An adjustment hole 8 is provided on the worktable 1. This adjustment hole 8 can be a circular through-hole, its size designed to allow the floating base 9 to move freely within it within a small range. The floating base 9 is positioned within the adjustment hole 8 and extends through it. The floating base 9 is made of metal and its shape matches the adjustment hole 8. A groove 10 is provided on the upper surface of the floating base 9. This groove 10 is a standardized groove, its shape and size capable of stably accommodating the filter under test. Three clamping mechanisms 11 are evenly distributed around the adjustment hole 8 on the worktable 1. These clamping mechanisms 11 can be electric push rods. The point of action of each clamping mechanism 11 is precisely positioned on the same horizontal reference plane of the floating base 9. Each clamping mechanism 11 is equipped with a clamping force sensor 12, which can be integrated into the execution end of the clamping mechanism 11 for real-time monitoring of the clamping force on the floating base 9. When the measuring arm 4 moves down along the longitudinal track 2 to the preset position, a signal is triggered. This signal is used to control the three clamping mechanisms 11 to move synchronously, thereby forming a stable three-point clamping of the floating base 9. This clamping method ensures the positional stability of the floating base 9 during the measurement process. Three lifting mechanisms 13 are evenly distributed around the adjustment hole 8 on the worktable 1, and these lifting mechanisms 13 are located below the bottom of the groove 10 of the floating base 9. Each lifting mechanism 13 can be an electrically driven lifting column, the end of which is designed to abut against the bottom of the floating base 9. These lifting mechanisms 13 are independently controllable and connected to the data processing unit of the clamping force sensor 12. After the three clamping mechanisms 11 clamp the floating base 9, the clamping force sensor 12 will feed back the clamping force value of each.The control system compares the difference in clamping forces at these three points. If the difference exceeds a preset threshold, it will drive the corresponding lifting mechanism 13 to make fine adjustments based on the difference in force at each point. For example, the lifting mechanism 13 corresponding to the point with the smaller force will move upward, and the lifting mechanism 13 corresponding to the point with the larger force will move downward, until the difference in clamping forces at the three points is reduced to within the preset threshold, thereby achieving the horizontal adjustment of the floating base 9 and the groove 10 on it.

[0023] Therefore, this filter height measuring instrument, through the cooperation of the floating base 9 and the three-point clamping and lifting mechanism 13, achieves real-time leveling of the filter placement reference. Simultaneously, through the dual pressure sensors on the measuring arm 4 and the angle adjustment motor 5, it achieves real-time correction of the contact angle between the measuring arm 4 and the top surface of the filter. This effectively solves the problem of spatial posture error in traditional filter height measurement. It can dynamically respond to uncertainties caused by individual differences in the workpiece and the randomness of placement during each measurement, ensuring the accuracy of the measurement results.

[0024] In one implementation, such as Figure 4 As shown.

[0025] The filter height measuring instrument provided in this embodiment has a clamping mechanism 11 including a mounting base 14 fixed to the workbench 1, a guide rod 15 telescopically disposed on the mounting base 14, and a roller 16 rotatably connected to the end of the guide rod 15. A spring 17 is sleeved on the guide rod 15, and a clamping force sensor 12 is disposed at one end of the spring 17.

[0026] In this embodiment, the mounting base 14 is a structural component used to fix and support the main body of the clamping mechanism 11. It is fixed at a preset position on the worktable 1, providing a stable base for the clamping mechanism 11 and ensuring that the clamping mechanism 11 does not shift during clamping, thereby guaranteeing accurate transmission of clamping force. The guide rod 15 is a slender rod-shaped structure used to provide precise linear motion guidance and to support the spring 17 and roller 16. The roller 16 is mounted at the end of the guide rod 15 for contact with the floating base 9 and reduces contact resistance through rolling friction. The spring 17 is sleeved on the guide rod 15 to absorb impact during clamping. The clamping force sensor 12 is used to monitor the force applied by the clamping mechanism 11 to the floating base 9 in real time. When the measuring arm 4 descends and triggers the clamping mechanism 11, the mounting base 14 provides stable support, and the guide rod 15 ensures that the roller 16 extends smoothly and contacts the floating base 9. The clamping force sensor 12 is directly installed at one end of the spring 17, which can accurately detect the compressive force on the spring 17, thereby obtaining clamping force data in real time and accurately.

[0027] In one implementation, such as Figure 4 As shown.

[0028] The filter height measuring instrument provided in this embodiment has three mounting slots 18 with surrounding adjustment holes 8 at the bottom of its worktable 1. Each mounting slot 18 is located on the same horizontal reference plane, and the mounting base 14 of each clamping mechanism 11 is fixed in the mounting slot 18.

[0029] In this embodiment, the mounting slots 18 are provided at the bottom of the worktable 1 to accommodate and fix the clamping mechanism 11. Their overall layout ensures that the clamping mechanism 11 is symmetrically distributed around the floating base 9. Each mounting slot 18 is located on the same horizontal reference plane, meaning that the bottoms of all three mounting slots 18 are on a common, precisely level plane. This directly affects the uniform distribution of clamping force and the leveling accuracy of the floating base 9. During the machining process of the worktable 1, after the mounting slots 18 are machined, the positioning surfaces of each mounting slot 18 are refined through precision grinding and other post-processing techniques, and calibrated using a level to meet the requirement of the same horizontal reference plane. Three mounting slots 18 are opened at the bottom of the worktable 1, surrounding the adjustment hole 8, and these mounting slots 18 are ensured to be located on the same horizontal reference plane, providing a mounting base for the clamping mechanism 11. When the mounting seats 14 of each clamping mechanism 11 are fixed within these mounting slots 18, the problem of uneven clamping force distribution caused by non-level mounting positions can be effectively avoided. Because of the horizontal positioning of the mounting slot 18, the three clamping mechanisms 11 can accurately locate their points of action on the same horizontal reference plane when clamping the floating base 9 at three points. This is crucial for the subsequent base leveling steps, because the uniform initial clamping force allows the clamping force sensor 12 to more accurately reflect the actual tilt state of the floating base 9, thereby guiding the lifting mechanism 13 to make adjustments.

[0030] In one implementation, such as Figure 3 and Figure 4 As shown.

[0031] The filter height measuring instrument provided in this embodiment has a mounting plate 19 below the worktable 1, and a ball socket support 20 on the mounting plate 19. The ball socket support 20 is located directly below the adjustment hole 8. The bottom of the floating base 9 is a ball head plunger 21. The ball head plunger 21 and the ball socket support 20 are fitted together by a spherical surface to form a universal support structure.

[0032] In this embodiment, the ball-and-socket support 20 is a support component with a spherical concave surface, and the ball-head plunger 21 is a columnar component with a spherical convex surface at the bottom. The universal support structure formed by the two allows the floating base 9 to rotate or tilt freely in multiple directions. This design enables the floating base 9 to rotate and tilt freely and smoothly in multiple directions with the ball-and-socket support 20 as the center point when adjusting its level. When the three clamping mechanisms 11 form a three-point clamp on the floating base 9 in response to the downward movement of the measuring arm 4, and the three lifting mechanisms 13 adjust the level of the floating base 9 according to the difference in clamping force, the universal support structure ensures that the floating base 9 can reach the ideal level with less energy loss and a faster response speed.

[0033] In one implementation, such as Figure 1 As shown.

[0034] The filter height measuring instrument provided in this embodiment has a worktable 1 with legs 22 at the bottom and a transverse reinforcing beam 23 between adjacent legs 22. The mounting plate 19 and the legs 22 are integrally formed.

[0035] In this embodiment, the bottom of the workbench 1 is provided with support legs 22 to provide basic support for the workbench 1. The transverse reinforcing beams 23 provided between adjacent support legs 22 connect the originally relatively independent support legs 22 into a more stable frame structure, which enhances the transverse rigidity of the bottom of the workbench 1. The mounting plate 19 and the support legs 22 are integrated to ensure the integrity between the mounting plate 19 and the support legs 22.

[0036] In one implementation, such as Figure 1 As shown.

[0037] The filter height measuring instrument provided in this embodiment has a leveling foot 24 at the bottom of its support leg 22.

[0038] In this embodiment, by providing leveling feet 24 at the bottom of the support legs 22, the overall levelness of the worktable 1 can be easily adjusted.

[0039] In one implementation, such as Figure 2 As shown.

[0040] The filter height measuring instrument provided in this embodiment includes a lifting base 3 comprising two horizontally opposite base plates 25. An adjustment port 26 is provided on the base plate 25, and the measuring arm 4 is fixed at the adjustment port 26. The adjustment port 26 provides space for adjusting the angle of the measuring arm 4.

[0041] In this embodiment, an adjustment port 26 is provided on the base plate 25, allowing the measuring arm 4 to be stably fixed at the adjustment port 26, thus solving the problem of limited space for angle adjustment of the measuring arm 4 in the traditional lifting base 3 structure. The existence of the adjustment port 26 provides sufficient space for the pitch of the measuring arm 4. When the first pressure sensor 6 and the second pressure sensor 7 at the bottom of the measuring arm 4 contact the top surface of the filter, the angle adjustment motor 5 can adjust the angle of the measuring arm 4 according to the detection signals of the two pressure sensors, through the space provided by the adjustment port 26, until it is completely parallel to the top surface of the filter.

[0042] In one implementation, such as Figure 2 As shown.

[0043] The filter height measuring instrument provided in this embodiment has a pressing groove 27 at the bottom of the measuring arm 4. The first pressure sensor 6 and the second pressure sensor 7 are elastically connected in the pressing groove 27 and protrude relative to the bottom of the measuring arm 4.

[0044] In this embodiment, a pressing groove 27 is provided at the bottom of the measuring arm 4 to provide a space for the first pressure sensor 6 and the second pressure sensor 7, so that the sensors can be installed in a flexible connection manner and the sensors can adapt to the slight unevenness of the workpiece surface.

[0045] In one implementation, such as Figure 4 As shown.

[0046] The filter height measuring instrument provided in this embodiment has a leveling ball head 28 at the end of the lifting mechanism 13, and a leveling ball socket 29 that matches the leveling ball head 28 at the bottom of the floating base 9.

[0047] In this embodiment, the leveling ball head 28 of the lifting mechanism 13 and the leveling ball socket 29 of the floating base 9 form a spherical fit, optimizing the contact method from traditional surface or line contact to point contact. This significantly reduces the frictional resistance of the contact surface, allowing the floating base 9 to respond more sensitively.

[0048] In one implementation, such as Figure 5 As shown.

[0049] This embodiment provides a filter height measurement method, which includes a workpiece loading step: placing the filter in the groove 10 of the floating base 9; a measuring arm 4 descent triggering step: controlling the measuring arm 4 to descend along the longitudinal track 2 to a preset trigger position, triggering the synchronous action of three clamping mechanisms 11 to form a three-point clamping of the floating base 9; a clamping force detection step: acquiring the real-time clamping force at the three clamping points through each clamping force sensor 12; and a base leveling step: comparing the three clamping forces, if the difference exceeds a first set threshold, controlling the corresponding lifting mechanism 13 to adjust the level of the floating base 9 according to the force value at each point. The angle of the measuring arm 4 is adjusted until the difference between the three clamping forces is less than or equal to the first set threshold. The measuring arm 4 then contacts the top surface of the filter. The measuring arm 4 is leveled by acquiring the pressure values ​​of the first pressure sensor 6 and the second pressure sensor 7. If the difference exceeds the second set threshold, the angle adjustment motor 5 is controlled to adjust the angle of the measuring arm 4 until the pressure difference between the two points is less than or equal to the second set threshold. Finally, the height of the filter is measured after the floating base 9 is level and the angle of the measuring arm 4 is adjusted.

[0050] When measuring the height of filters from different batches, there may be slight flatness errors between the bottom mounting surface and the top measuring surface of these filters. Traditional height measuring equipment cannot compensate for these errors in real time, resulting in large fluctuations in the measurement results. In this embodiment, when loading the workpiece, the operator places the filter to be tested into the groove 10 of the floating base 9. At this time, due to slight deviations in the initial posture of the bottom of the filter or the floating base 9, the top surface of the filter may not be perfectly horizontal. When the measuring arm 4 is triggered to descend, the control system drives the lifting seat 3 to descend along the longitudinal track 2. When the measuring arm 4 descends to the preset trigger position, it triggers the synchronous action of the three clamping mechanisms 11. The guide rod 15 of the clamping mechanism 11 extends, and the roller 16 abuts against the floating base 9, forming a three-point clamping of the floating base 9. When the clamping force is detected and leveled with the base, the clamping force sensor 12 acquires the clamping force at the three clamping points in real time. The control system compares these force values, and if the difference exceeds a first set threshold, it controls the corresponding lifting mechanism 13 to operate according to the force value at each point. The lifting mechanism 13 adjusts the levelness of the floating base 9 through the cooperation of the leveling ball head 28 and the leveling ball socket 29 until the difference in the clamping forces at the three points is less than or equal to the first set threshold. This step ensures that the reference surface of the filter is accurately leveled, eliminating the reference surface tilt error caused by workpiece placement or unevenness at its bottom. Dynamic and real-time leveling of the workpiece placement reference is achieved. When the measuring arm 4 contacts the filter, after the floating base 9 is leveled, the control system continues to drive the measuring arm 4 downward, so that the first pressure sensor 6 and the second pressure sensor 7 at its bottom gently contact the top surface of the filter. When the measuring arm 4 is leveled, the control system acquires the pressure values ​​of the first pressure sensor 6 and the second pressure sensor 7. If the difference exceeds the second set threshold, the angle adjustment motor 5 is controlled to adjust the angle of the measuring arm 4. The angle adjustment motor 5 precisely adjusts the tilt angle of the measuring arm 4 through the space provided by the adjustment port 26 until the pressure difference between the two points is less than or equal to the second set threshold. This step dynamically corrects the parallelism error between the measuring arm 4 and the top surface of the filter. During height measurement, with the floating base 9 horizontal and the measuring arm 4 angle adjusted, the system performs the filter height measurement. At this time, the vertical position of the measuring arm 4 is recorded, obtaining the true height value of the filter.

[0051] Through the above process, the height measuring instrument achieves synchronous and real-time correction of complex spatial posture errors such as the tilt of the filter placement reference and the non-parallelism of the workpiece top surface, significantly improving the accuracy of height measurement.

[0052] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A filter altimeter, characterized by, The workbench is provided with a longitudinal track, a slidable lifting seat is arranged on the longitudinal track, a measuring arm extending in the transverse direction is arranged on the lifting seat, an angle adjusting motor connecting the measuring arm is arranged on the lifting seat, a first pressure sensor and a second pressure sensor extending in the transverse direction are arranged on the bottom of the measuring arm, and the angle adjusting motor adjusts the angle of the measuring arm according to the detection signals of the first pressure sensor and the second pressure sensor. An adjusting hole is arranged on the workbench, a floating base is arranged in the adjusting hole, a groove for placing the filter is arranged on the floating base, three clamping mechanisms uniformly distributed around the adjusting hole are arranged on the workbench, the action points of the clamping mechanisms are located on the same horizontal reference surface of the floating base, the clamping mechanisms are provided with clamping force sensors, the three clamping mechanisms form three-point clamping of the floating base in response to the downward movement of the measuring arm, three jacking mechanisms uniformly distributed around the adjusting hole and located at the bottom of the groove are arranged on the workbench, the jacking mechanisms abut against the floating base, and the jacking mechanisms adjust the levelness of the groove according to the difference of the clamping forces.

2. The filter altimeter of claim 1, wherein The clamping mechanism comprises a mounting seat fixed to the workbench, a guide rod telescopically arranged on the mounting seat, and a roller rotatably connected to the end of the guide rod, a spring is sleeved on the guide rod, and the clamping force sensor is arranged at one end of the spring.

3. The filter altimeter of claim 2, wherein Three installation grooves around the adjusting hole are arranged on the bottom of the workbench, and the installation grooves are located on the same horizontal reference surface.

4. The filter altimeter of claim 1, wherein An installation plate is arranged below the workbench, a ball socket support is arranged on the installation plate, the ball socket support is located directly below the adjusting hole, the bottom of the floating base is a ball plunger, and the ball plunger and the ball socket support are matched through a spherical surface to form a universal support structure.

5. The filter altimeter of claim 4, wherein, The bottom of the workbench is provided with a support leg, a transverse reinforcing beam is arranged between adjacent support legs, and the installation plate and the support leg are integrally arranged.

6. The filter altimeter of claim 5, wherein, The bottom of the support leg is provided with a leveling foot.

7. The filter altimeter of claim 1, wherein The lifting seat comprises two seat plates opposite to each other in the transverse direction, an adjusting opening is arranged on the seat plate, the measuring arm is fixed to the adjusting opening, and the adjusting opening provides space for the angle adjustment of the measuring arm.

8. The filter altimeter of claim 7, wherein, A pressing groove is arranged at the bottom of the measuring arm, the first pressure sensor and the second pressure sensor are elastically connected in the pressing groove, and protrude relative to the bottom of the measuring arm.

9. The filter altimeter of claim 1, wherein, The end of the jacking mechanism is a leveling ball head, and the bottom of the floating base is provided with a leveling ball socket matched with the leveling ball head.

10. A filter altimetry method, characterized in that, The filter height gauge based on any one of claims 1 to 9 comprises A workpiece loading step: placing the filter in the groove of the floating base; A measuring arm downward triggering step: controlling the measuring arm to move downward along the longitudinal track to a preset triggering position, triggering the synchronous action of the three clamping mechanisms to form three-point clamping of the floating base; Clamping force detection step: obtaining real-time clamping force of three clamping points through each clamping force sensor; Base leveling step: comparing the clamping forces, if the difference exceeds the first set threshold, then controlling the corresponding lifting mechanism to act according to the force value of each point, adjusting the levelness of the floating base, until the difference of the clamping forces is less than or equal to the first set threshold; Measuring arm contact step: controlling the measuring arm to continue to descend, so that the first pressure sensor and the second pressure sensor at the bottom of the measuring arm contact the top surface of the filter; Measuring arm leveling step: obtaining the pressure values of the first pressure sensor and the second pressure sensor, if the difference exceeds the second set threshold, then controlling the angle adjusting motor to adjust the angle of the measuring arm, until the pressure difference of the two points is less than or equal to the second set threshold; Height measurement step: after the floating base is leveled and the angle adjustment of the measuring arm is completed, the height measurement of the filter is performed.

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