Diaphragm thickness measuring device

Abstract

The utility model provides a diaphragm thickness measuring device, and relates to the technical field of diaphragm thickness detection. The diaphragm thickness measuring device comprises a testing unit, a driving unit and a sensing linkage unit. The test unit comprises a test board and a liftable test piece, a test head of the liftable test piece faces the test board, and the liftable test piece is used for being in contact with or away from a to-be-tested diaphragm on the test board in the lifting process. And the driving unit is used for pulling the diaphragm to be tested on the test board to move. And the sensing linkage unit is electrically connected with the driving unit and the liftable test piece. According to the diaphragm thickness measuring device, the regularization, uniformization and data continuity of selected points can be ensured by means of single-point equidistance, automatic movement and automatic testing, so that the diaphragm thickness is automatically measured, the influence of personnel factors on data authenticity is reduced or avoided as much as possible, and the testing accuracy is improved. The diaphragm thickness measuring device is simple and convenient to operate, high in working efficiency and low in labor cost.

Description

Technical Field

[0001] The present application relates to the technical field of diaphragm thickness detection, and in particular to a diaphragm thickness measuring device. Background Art

[0002] In the structure of lithium batteries, the diaphragm is one of the key internal components. The thickness of the diaphragm has a great influence on the mechanical properties and internal resistance of the diaphragm. Under the premise of ensuring a certain mechanical strength, a low diaphragm thickness can reduce the internal resistance of the battery and improve the energy and power density of the battery. In addition, the uniform thickness of the battery diaphragm is also an important indicator of battery consistency and has a great influence on battery performance. Therefore, the thickness test of the diaphragm is an indispensable test item.

[0003] The thickness measurement of the diaphragm often requires sampling at different locations. For example, a sample of a certain size needs to be selected and multiple points in the MD (longitudinal) and TD (transverse) directions need to be measured to obtain the average thickness in different directions.

[0004] At present, most of the diaphragm thickness gauges used in the market or laboratories adopt mechanical contact measurement, which requires manual pressing of the pointer to make the probe contact the film, and then the height is raised and lowered to achieve thickness measurement. The speed and force of the lifting and lowering need to be operated within a certain range to obtain accurate data. This has the disadvantages of high requirements on personnel ability, large errors, and low degree of automation.

[0005] In addition, the test samples need to be manually cut to a specific size, and each time they rely on manual movement to ensure the acquisition of the next test point, the thickness of the diaphragm cannot be detected continuously, and the efficiency is low. The points will be selected at unequal intervals due to the speed of movement, and there is a certain randomness, resulting in low accuracy of the diaphragm thickness data. Utility Model Content

[0006] The purpose of the embodiments of the present application is to provide a diaphragm thickness measuring device, which can realize automatic measurement of diaphragm thickness and improve the accuracy of measuring diaphragm thickness.

[0007] In a first aspect, an embodiment of the present application provides a diaphragm thickness measuring device, which includes a testing unit, a driving unit and a sensor linkage unit.

[0008] The test unit includes a test bench and a liftable test piece, wherein the probe of the liftable test piece faces the test bench, and the liftable test piece is used to contact or stay away from the diaphragm to be tested on the test bench during the lifting process.

[0009] The drive unit is used to pull the diaphragm to be tested on the test bench to make it move.

[0010] The sensing linkage unit is electrically connected to the driving unit and the liftable test piece, and is used to control the liftable test piece to perform lifting motion, and to control the driving unit to provide traction.

[0011] In the above-mentioned implementation process, the diaphragm thickness measuring device of the present application can be used to measure the thickness of the diaphragm. The diaphragm to be tested is placed on the test bench. The sensor linkage unit can control the driving unit to pull the diaphragm to be tested to move at a uniform speed, and at the same time control the liftable test piece to perform equal-time and equal-load lifting and lowering movements. When the liftable piece descends to the lowest end, the end of the liftable piece squeezes the diaphragm to be tested on the test bench and maintains the test stability for a certain period of time. After outputting the pressure and contact area data, the liftable piece rises away from the diaphragm to be tested, and the above process is repeated. The thickness data of the diaphragm to be tested at different positions can be measured.

[0012] The diaphragm thickness measuring device of the present application can ensure the regularity and uniformity of point selection and data continuity by using single-point equidistant, automatic movement and automatic testing, thereby realizing automatic measurement of diaphragm thickness, reducing or minimizing the influence of human factors on data authenticity, and improving the accuracy of the test. The diaphragm thickness measuring device of the present application is simple and convenient to operate, has high working efficiency and low labor cost.

[0013] In a possible embodiment, the drive unit includes a drive bracket, a drive motor and a drive wheel, the drive bracket has a traction surface for placing the diaphragm to be tested, the drive wheel is connected to the drive bracket and located on the top side of the traction surface, and the drive motor is transmission-connected to the drive wheel.

[0014] In the above implementation process, the sensor linkage unit can control the driving motor to rotate, the driving motor drives the driving wheel to rotate, and the driving wheel pulls the diaphragm to be tested on the traction surface to move.

[0015] In a possible implementation, the driving unit further includes two limit plates arranged side by side, the two limit plates are fixedly connected to the traction surface, and a channel for accommodating the diaphragm to be tested is formed between the two limit plates.

[0016] In the above implementation process, any two adjacent limiting plates can limit the moving direction of the diaphragm to be tested, so that the diaphragm to be tested moves along the extension direction of the channel under the traction of the driving wheel.

[0017] In a possible implementation, the driving unit has an adjusting knob for adjusting the rotation speed of the driving wheel, and the adjusting knob is electrically connected to the sensor linkage unit.

[0018] In the above implementation process, the adjusting knob is used to adjust the speed of the driving wheel. After the speed of the adjusting knob is selected, the adjusting knob sends a speed signal to the sensor linkage unit. The sensor linkage unit controls the driving wheel to move at a uniform speed at a corresponding rate, thereby driving the diaphragm to be tested to move at a uniform speed at a corresponding rate.

[0019] In a possible implementation, the membrane thickness measuring device further includes a winding unit, the winding unit includes a winding support and a winding member, the winding member is used to wind up the membrane to be tested, and the winding member is fixedly connected to the winding support.

[0020] In the above implementation process, the diaphragm to be tested can be rolled up on the winding member, so that the diaphragm thickness measuring device can be automatically rolled up.

[0021] In a possible embodiment, the winding member includes a rotatable winding shaft and a winding disk located at an end of the winding shaft.

[0022] In the above implementation process, the diaphragm to be tested can be rolled up on the winding shaft, and the winding disk can limit the winding direction of the diaphragm to be tested, so that the diaphragm to be tested is rolled up along a preset direction.

[0023] In a possible implementation, the diaphragm thickness measuring device further includes a traction bar, one end of the traction bar is wound around the winding member, and the other end of the traction bar at least extends to the driving unit.

[0024] In the above implementation process, the traction bar can be used to drive the diaphragm to be tested to advance and reel in an orderly manner.

[0025] In a possible implementation manner, the diaphragm thickness measuring device further includes a data processing unit, and the data processing unit is electrically connected to the sensor linkage unit.

[0026] In the above implementation process, the data processing unit can perform statistics and analysis based on the data transmitted by the sensor linkage unit.

[0027] In a possible embodiment, the liftable test piece comprises a pneumatic valve.

[0028] In the above implementation process, the pneumatic valve is used to adjust the test pressure.

[0029] In a possible implementation scheme, the test bench is made of marble.

[0030] In the above implementation process, marble material has high hardness, and the test bench made of marble material has small deformation under pressure, which has little effect on the accuracy of the measurement data of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic structural diagram of a diaphragm thickness measuring device according to an embodiment of the present application;

[0033] Figure 2 This is a test diagram of the diaphragm sample 1 to be tested in Example 1 of the present application;

[0034] Figure 3 The SPC control chart output by the data processing unit of Example 1 of the present application;

[0035] Figure 4 This is a test diagram of the diaphragm sample 2 to be tested in Example 2 of the present application;

[0036] Figure 5 This is the SPC control chart output by the data processing unit of Example 2 of the present application.

[0037] Icons: 10-diaphragm thickness measuring device; 100-test unit; 110-test base; 120-test table; 130-liftable test piece; 131-pneumatic valve; 140-connecting rod; 200-driving unit; 210-driving bracket; 211-traction surface; 220-driving wheel; 230-adjusting knob; 240-limiting plate; 250-power switch; 260-panel; 300-sensing linkage unit; 400-winding unit; 410-winding bracket; 420-winding piece; 421-winding shaft; 422-winding reel; 430-traction bar; 500-data processing unit. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] See also Figure 1 The present application provides a diaphragm thickness measuring device 10 , which includes: a testing unit 100 , a driving unit 200 and a sensor linkage unit 300 .

[0045] The test unit 100 includes a test base 110, a test table 120, a liftable test piece 130 and a connecting rod 140. The test table 120 is set on the test base 110. The liftable test piece 130 is connected to the test base 110 through the connecting rod 140, and the probe of the liftable test piece 130 is facing the test table 120. The liftable test piece 130 is used to contact or move away from the diaphragm to be tested on the test table 120 during the lifting process, and the probe can contact and sense the diaphragm to be tested.

[0046] Optionally, the test base 110 is made of marble, which has high hardness, is not easily damaged, and will not rust.

[0047] Optionally, the test bench 120 is made of marble, which has high hardness. The test bench 120 made of marble has small deformation under pressure and has little effect on the accuracy of the measurement data of the diaphragm.

[0048] Optionally, the test bench 120 is rectangular, with a length and a width of 5 cm to 15 cm.

[0049] Optionally, the test bench 120 is square, with a length and a width of 10 cm.

[0050] The liftable test piece 130 further includes a pneumatic valve 131 . Opening the pneumatic valve 131 can be used to adjust the test pressure, and the test pressure range is 0.01N to 9N.

[0051] As an example, the test pressure may be 0.01N, 0.05N, 0.1N, 0.5N, 0.75N, 1N, 2N, 3N, 4N, 5N, 6N, 7N, 8N or 9N.

[0052] The driving unit 200 includes a driving bracket 210, a driving motor (not shown) and a driving wheel 220. The driving bracket 210 has a traction surface 211 for placing the diaphragm to be tested. The driving wheel 220 is connected to the driving bracket 210 and is located on the top side of the traction surface 211. The driving wheel 220 is used to pull the diaphragm to be tested on the traction surface 211 to move. The driving motor is arranged in the driving bracket 210 and is connected to the driving wheel 220 through transmission.

[0053] The driving unit 200 further includes an adjusting knob 230 for adjusting the rotation speed of the driving wheel 220. The adjusting knob 230 has driving speeds of different gears, thereby adjusting the rotation speed of the driving wheel 220. The adjustable rotation speed range of the driving wheel 220 is 0.5 cm / s to 10 cm / s.

[0054] As an example, the adjustment knob 230 has five different gears of driving speed, corresponding to the speed of the driving wheel 220 being 0.5 cm / s, 1 cm / s, 2 cm / s, 5 cm / s or 10 cm / s respectively.

[0055] The driving unit 200 also includes two limit plates 240 arranged side by side, one end of the two limit plates 240 is fixedly connected to the traction surface 211, and the other end of the two limit plates 240 is fixedly connected to the test bench 120. A channel for accommodating the diaphragm to be tested is formed between the two limit plates 240, so that the diaphragm to be tested moves along the extension direction of the channel under the traction of the driving wheel 220 without moving left and right.

[0056] The driving unit 200 further includes a power switch 250 for controlling the driving unit 200 to start or shut down, and a panel 260 for displaying the rotation speed of the driving wheel 220 .

[0057] Optionally, the panel 260 may be a display panel 260 or a mechanical panel 260 .

[0058] The sensing linkage unit 300 is electrically connected to the liftable test piece 130 , the driving motor, the adjusting knob 230 and the power switch 250 , respectively.

[0059] When using the diaphragm thickness measuring device 10 of the present application to measure the thickness of the diaphragm, first place the diaphragm to be tested on the test bench 120, turn on the switch of the sensing linkage unit 300, start preparing to receive signals, turn on the power switch 250 of the drive unit 200, and adjust the knob 230 to control the speed of the drive wheel 220. After receiving the start and speed signals, the sensing linkage unit 300 sends a command to the drive motor to start working, and the drive motor drives the drive wheel 220 to rotate, and the drive wheel 220 pulls the diaphragm to be tested to move at a uniform speed corresponding to the speed; at the same time, the sensing linkage unit 300 sends a command to the liftable test piece 130 to control the liftable test piece 130 to perform equal-time and equal-load lifting and lowering movements. When the liftable piece descends to the lowest end, the end of the liftable piece squeezes the diaphragm to be tested on the test bench 120 and maintains the test stability for a certain period of time. After outputting the pressure and contact area data, the liftable piece rises away from the diaphragm to be tested, and the above process is repeated. The thickness data of the diaphragm to be tested at different positions can be measured, and the test accuracy is 0.1μm.

[0060] The diaphragm thickness measuring device 10 also includes a winding unit 400, which includes a winding bracket 410 and a winding member 420. The winding member 420 is used to wind up the diaphragm to be tested, and the winding member 420 is fixedly connected to the winding bracket 410, so that the diaphragm thickness measuring device 10 can be automatically wound up without affecting the next automatic test of the diaphragm, so that the diaphragm thickness measuring device 10 can continuously measure the thickness of multiple different diaphragms.

[0061] Optionally, the winding member 420 includes a rotatable winding shaft 421 and a winding disk 422 located at the end of the winding shaft 421 , and the winding shaft 421 is fixed to the end of the winding shaft 421 by bolts.

[0062] The diaphragm to be tested can be rolled up on the winding shaft 421 in an orderly manner, and the winding reel can limit the winding direction of the diaphragm to be tested, so that the diaphragm to be tested is rolled up along a preset direction.

[0063] Optionally, the diaphragm thickness measuring device 10 further includes a traction bar 430 , one end of which is wound on the winding member 420 , and the other end of the traction bar 430 at least extends to the driving unit 200 . The traction bar 430 can be used to drive the diaphragm to be tested to move forward and wind up in an orderly manner.

[0064] Optionally, the traction strip 430 may be made of silk, fiber or plastic.

[0065] Optionally, the winding unit 400 is electrically connected to the sensor linkage unit 300 and can transmit the winding information to the sensor linkage unit 300, so as to facilitate unified transmission and work distribution.

[0066] The diaphragm thickness measuring device 10 further includes a data processing unit 500 , which is electrically connected to the sensor linkage unit 300 . The data processing unit 500 can perform statistics and analysis based on the data transmitted by the sensor linkage unit 300 .

[0067] Optionally, the diaphragm thickness measuring device 10 is configured with a quality management system (QMS), which can set the number of tests and automatically enter test data, perform inspection data processing, and increase the quality management function of the entire supply chain for different quality businesses. Through the assigned inspection tasks, the inspection execution status can be tracked in real time and quality statistical reports and charts can be generated in real time, completing data testing, statistics and simple analysis work automatically, in one stop, accurately and intuitively.

[0068] Optionally, the length of the diaphragm to be tested is 100 cm to 200 cm.

[0069] The diaphragm thickness measuring device 10 of the present application can automatically select points, automatically transfer films, automatically test, and automatically upload data, etc., thereby avoiding interference from human factors in each link, avoiding the occurrence of foreign matter or scratches on the test film surface caused by human factors, avoiding different test pressures caused by different forces on the probe, and affecting data accuracy, avoiding irregular point selection and non-representative samples caused by different movement speeds, etc., reducing or avoiding the influence of human factors on data authenticity as much as possible, and improving the accuracy of the test. In addition, the diaphragm thickness measuring device 10 of the present application can ensure the regularization and uniformity of point selection by using a single-point equidistant movement method, the diaphragm to be tested can be automatically moved by signal instructions, and the probe can be automatically raised and lowered by signal instructions to achieve multiple measurements, with high continuity. At the same time, during the entire test process, personnel are no longer required to cut samples, transfer films, manually test, and frequently collect data, which greatly improves work efficiency and reduces burdens and increases efficiency.

[0070] A diaphragm thickness measuring device 10 of the present application is further described in detail below in conjunction with an embodiment.

[0071] Example 1

[0072] The diaphragm thickness measuring device 10 of the present application is used to detect the thickness of the diaphragm sample 1 to be measured, including the following steps:

[0073] 1. Cut the diaphragm sample 1 to be tested into a rectangle with a length of 95 cm and a width of 8 cm. Figure 2 shown.

[0074] 2. Wipe the test bench 120 and the probe, and calibrate and reset.

[0075] 3. Place the diaphragm sample 1 to be tested on the test bench 120, and the vertical point of the probe on the plane is 2.5 cm away from the head end of the diaphragm sample 1 to be tested, that is, Figure 2 The location of test point 1 in .

[0076] 4. Turn on the switch of the sensor linkage unit 300 and start preparing to receive signals.

[0077] 5. Turn on the drive unit 200 and select the gear position of the adjustment knob 230. The drive speed is 10 cm / s.

[0078] 6. Set the test pressure to 0.75N.

[0079] 7. Set the number of times of this test in the data processing unit 500 to 10 times.

[0080] 8. The diaphragm sample 1 to be tested moves at a uniform speed according to the speed set by the adjustment knob 230, driven by the driving wheel 220, and moves 10 cm per second. The liftable test piece 130 is driven by the signal of the sensor linkage unit 300 to perform a downward movement to complete the first test. The diaphragm sample 1 to be tested is driven forward by the pull bar, and the two limit plates 240 limit its movement to smoothly reel it up.

[0081] 9. After the first test, the sensor linkage unit 300 sends a signal to drive the liftable test piece 130 to rise, and the drive unit 200 moves forward 10 cm. The liftable test piece 130 is pressed down again to complete the second test. After 10 consecutive cycles, the test stops automatically.

[0082] 10. The data processing unit 500 automatically obtains the test data. After checking the basic information, the system confirms that the data is OK and processes the data, and generates quality statistical reports and charts in real time, completing the data testing, statistics and analysis work automatically, one-stop, accurately and intuitively.

[0083] 11. This test tested 10 points in total, and the data obtained are shown in Table 1. The statistical report output is automatically generated based on the other basic information entered.

[0084] Table 1

[0085]

[0086] 12. After selecting multiple sets of data, the SPC control chart is automatically output, such as Figure 3 shown.

[0087] Example 2

[0088] The diaphragm thickness measuring device 10 of the present application is used to detect the thickness of the diaphragm sample 1 to be measured, including the following steps:

[0089] 1. Cut the diaphragm sample 2 to be tested into a rectangle with a length of 200 cm and a width of 10 cm. Figure 4 shown.

[0090] 2. Wipe the test bench 120 and the probe, and calibrate and reset.

[0091] 3. Place the diaphragm sample 2 to be tested on the test bench 120. If the front diaphragm has defects that affect the test, turn on the switch of the sensor linkage unit 300 and start preparing to receive signals to allow it to automatically reel in.

[0092] 4. The probe reselects the position of test point 1, such as Figure 4 shown.

[0093] 5. Turn on the drive unit 200 and select the gear position of the adjustment knob 230. The drive speed is 5 cm / s.

[0094] 6. Set the test pressure to 0.75N.

[0095] 7. Set the number of times of this test in the data processing unit 500 to 13 times.

[0096] 8. The diaphragm sample 2 to be tested moves at a uniform speed according to the speed set by the adjustment knob 230, driven by the driving wheel 220, and moves 5 cm per second. The liftable test piece 130 is driven by the signal of the sensor linkage unit 300 to perform a downward movement to complete the first test. The diaphragm sample 2 to be tested is driven forward by the pull bar, and the two limit plates 240 limit its movement to smoothly reel it up.

[0097] 9. After the first test, the sensor linkage unit 300 sends a signal to drive the liftable test piece 130 to rise, and the drive unit 200 moves forward another 5 cm. The liftable test piece 130 is pressed down again to complete the second test. The test stops automatically after 13 consecutive cycles.

[0098] 10. The data processing unit 500 automatically obtains the test data. After checking the basic information, the system confirms that the data is OK and processes the data, and generates quality statistical reports and charts in real time, completing the data testing, statistics and analysis work automatically, one-stop, accurately and intuitively.

[0099] 11. This test tested a total of 13 points, and the data obtained are shown in Table 2. The statistical report output is automatically generated based on the other basic information entered.

[0100] Table 2

[0101]

[0102] 12. After selecting multiple sets of data, the SPC control chart is automatically output, such as Figure 5 shown.

[0103] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A diaphragm thickness measuring device, characterized in that: The diaphragm thickness measuring device comprises a testing unit, a driving unit and a sensor linkage unit; The test unit comprises a test bench and a liftable test piece, wherein the probe of the liftable test piece faces the test bench, and the liftable test piece is used to contact or move away from the diaphragm to be tested on the test bench during the lifting process; The driving unit is used to pull the diaphragm to be tested on the test bench to make it move; The sensor linkage unit is electrically connected to the drive unit and the liftable test piece, and is used to control the liftable test piece to perform lifting motion, and to control the drive unit to provide traction.

2. The diaphragm thickness measuring device according to claim 1, characterized in that: The driving unit comprises a driving bracket, a driving motor and a driving wheel. The driving bracket has a traction surface for placing the diaphragm to be tested. The driving wheel is connected to the driving bracket and located on the top side of the traction surface. The driving motor is drivingly connected to the driving wheel.

3. The diaphragm thickness measuring device according to claim 2, characterized in that: The driving unit further comprises two limiting plates arranged side by side, the two limiting plates are fixedly connected to the traction surface, and a channel for accommodating the diaphragm to be tested is formed between the two limiting plates.

4. The diaphragm thickness measuring device according to claim 2, characterized in that: The driving unit has an adjusting knob for adjusting the rotation speed of the driving wheel, and the adjusting knob is electrically connected to the sensor linkage unit.

5. The diaphragm thickness measuring device according to claim 1, characterized in that: The membrane thickness measuring device further comprises a winding unit, wherein the winding unit comprises a winding support and a winding member, wherein the winding member is used for winding up the membrane to be tested, and the winding member is fixedly connected to the winding support.

6. The diaphragm thickness measuring device according to claim 5, characterized in that: The winding member comprises a rotatable winding shaft and a winding disk located at the end of the winding shaft.

7. The diaphragm thickness measuring device according to claim 5, characterized in that: The diaphragm thickness measuring device further comprises a traction bar, one end of which is wound around the winding member, and the other end of which at least extends to the driving unit.

8. The diaphragm thickness measuring device according to claim 1, characterized in that: The diaphragm thickness measuring device further comprises a data processing unit, and the data processing unit is electrically connected to the sensor linkage unit.

9. The diaphragm thickness measuring device according to claim 1, characterized in that: The liftable test piece includes a pneumatic valve.

10. The diaphragm thickness measuring device according to claim 1, characterized in that: The test bench is made of marble.

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