A detection device for the wear thickness of an automotive clutch disc

Abstract

The present invention belongs to the technical field of automobile clutch plate detection, and specifically relates to an automobile clutch plate wear thickness detection device, which includes an insulating housing; a solenoid is fixedly connected to one side wall of the insulating housing; a magnetically conductive metal rod is slidably connected to the end of the solenoid; a circuit board is fixedly connected inside the insulating housing; an output cable is fixedly connected to the bottom end of the insulating housing; the output cable is connected to the circuit board; a connecting plate is fixedly connected to the end of the solenoid; multiple support rods are slidably connected to the end of the connecting plate; by using the change in inductance to accurately measure the thickness of the detection target, a high-precision detection target is achieved, so that the actual position error is less than the insulating housing %, and the requirements for high-accuracy long-distance ranging are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile clutch plate detection, and specifically relates to a device for detecting the wear thickness of an automobile clutch plate. Background Art

[0002] At present, in the domestic heavy truck market in China, 90% of the market share of clutch wear displacement sensors is occupied by imported brands. The metal rod displacement sensors of WEBCO are mainly used, which are expensive and have high costs.

[0003] In the current prior art, for the metal rod displacement sensor of WEBCO, the detection of displacement needs to be carried out through operations in the ECU of the automobile. At the same time, the imported clutch wear displacement sensors lack a temperature compensation device and have a large temperature drift. Due to the vast territory of China and the large span of latitude from north to south, in the domestic usage environment with temperatures ranging from -40°C to 100°C, the temperature drift is very large, resulting in a large error in detection accuracy.

[0004] In use, the currently imported clutch wear displacement sensors are expensive, have high costs, and are not convenient for secondary development. Secondly, they have a large temperature drift, insufficient position accuracy, and large errors. Therefore, in view of the above problems, a device for detecting the wear thickness of an automobile clutch plate is proposed. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve the problems that in use, the currently imported clutch wear displacement sensors are expensive, have high costs, are not convenient for secondary development, secondly, have a large temperature drift, insufficient position accuracy, and large errors. Therefore, the present invention proposes a device for detecting the wear thickness of an automobile clutch plate.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A device for detecting the wear thickness of an automobile clutch plate according to the present invention includes an insulating housing; a solenoid is fixedly connected to one side wall of the insulating housing; a magnetically conductive metal rod is slidably connected to the end of the solenoid; a circuit board is fixedly connected inside the insulating housing; an output cable is fixedly connected to the bottom end of the insulating housing; the output cable is connected to the circuit board; during operation, this step uses the change in inductance to accurately measure the thickness of the detection target, achieving a high-precision detection target, making the actual position error less than the percentage of the insulating housing, and meeting the requirements of high-accuracy long-distance ranging.

[0007] Preferably, a temperature sensor is integrated inside the circuit board, which can accurately detect the accurate temperature within -40°C to 100°C. The matrix compensation algorithm is used for temperature compensation of the inductance, and the actual displacement accuracy of the metal rod will not change due to temperature changes, so that within the temperature range, the accuracy is less than 0.1 mm;

[0008] With an adaptive temperature high-precision compensation algorithm, the temperature drift is 0.5% within the temperature range of (-40°C - 100°C).

[0009] The phasor method is used to accurately measure the impedance of the inductance coil, and then the inductance of the coil is calculated according to the AC impedance. The calculation formula is Z = R + jXL = R + jwL = R + j2πfL

[0010] By applying a sine wave of a certain frequency to the inductance coil and amplifying it in a virtual manner using an operational amplifier. After amplification, A / D conversion is used to obtain the amplitudes and phases of the AC voltage and current signals of the inductance coil, and the AC impedance of the inductance coil can be accurately calculated. According to XL = 2*Pi*f*L, the inductance of the coil can be calculated, and finally the current accurate inductance value can be calculated. Through multi-point position calibration and high and low temperature adaptive matrix temperature compensation, the current displacement can be calculated, and thus the wear thickness of the clutch can be obtained;

[0011] The output of the wear displacement of the automotive clutch adopts a full digital interface to supply real-time data to the automotive ECU or other interfaces. In addition, when detecting the displacement, the actions of stepping on and lifting the clutch disc are detected and a signal is output. When the wear of the clutch disc reaches the set value, an alarm output is given.

[0012] Preferably, a connecting plate is fixedly connected to the end of the solenoid; a plurality of support rods are slidably connected to the end of the connecting plate; a scraper is fixedly connected to the end of each of the plurality of support rods; the scraper is sleeved on the outer side wall of the magnetically conductive metal rod; positioning plates are fixedly connected to the side walls of the plurality of support rods; during operation, this step utilizes the contact effect between the scraper and the magnetically conductive metal rod to clean the surface of the magnetically conductive metal rod during the movement of the magnetically conductive metal rod, reducing the influence of dust and impurities on the detection result when they enter the solenoid along with the magnetically conductive metal rod, and at the same time reducing the accumulation of dust and impurities between the inside of the solenoid and the magnetically conductive metal rod, which affects the normal movement of the subsequent magnetically conductive metal rod.

[0013] Preferably, a plurality of first chutes are provided on the side wall of the support rod; a pair of limiting plates are provided on the inner side wall of the connecting plate; the limiting plates and the inner side wall of the connecting plate are connected by rubber plates; during operation, this step utilizes the vibration effect generated during the movement of the support rod to loosen and clean the impurities that adhere more tightly, so that they can be smoothly removed, reducing the situation of entering the solenoid along with the magnetically conductive metal rod, and improving the stability of the equipment during operation.

[0014] Preferably, a plurality of second sliding grooves are formed in the inner side wall of the connecting plate; a plurality of cleaning plates are fixedly connected to the end of the connecting plate; the side wall of the cleaning plate contacts the surface of the support rod; a connecting belt is fixedly connected to the end of the limiting plate; the other end of the connecting belt passes through the second sliding groove and is fixedly connected to the middle side wall of the cleaning plate; during operation, by utilizing the moving effect of the support rod in this step, the limiting plate can apply a pulling effect on the cleaning plate during movement, driving the cleaning plate to fit on the side wall of the support rod, increasing the friction force on the support rod, and at the same time enabling the cleaning plate to block the dust and impurities existing on the support rod, reducing the situation that dust and impurities enter the inside of the connecting plate and causing jamming.

[0015] Preferably, a third sliding groove is formed in the side wall of the scraping plate in contact with the magnetically conductive metal rod; a fourth sliding groove is formed in the side wall of the third sliding groove; a pair of brush hairs are fixedly connected to the side wall of the fourth sliding groove; during operation, by utilizing the cleaning effect of the brush hairs on the surface of the magnetically conductive metal rod in this step, it is possible to reduce the situation that the remaining impurities enter the inside of the solenoid after the scraping plate scrapes the impurities on the magnetically conductive metal rod, maintaining the smooth movement degree of the magnetically conductive metal rod and improving the movement accuracy of the device.

[0016] Preferably, a roller is rotatably connected to the inner side wall of the third sliding groove; the roller contacts the surface of the magnetically conductive metal rod; a plurality of first hair removing hooks are fixedly connected to the outer side wall of the roller; a pair of second hair removing hooks are fixedly connected to the side wall of the third sliding groove on both sides of the roller; during operation, by utilizing the contact between the roller and the magnetically conductive metal rod in this step, the hair debris existing on the magnetically conductive metal rod can be removed, reducing the hair debris from entering the inside of the connecting plate along with the magnetically conductive metal rod and causing accumulation, which affects the normal movement of the subsequent magnetically conductive metal rod.

[0017] Preferably, a plurality of magnets are fixedly connected inside the support rod, and the same group of magnets with mutually attracting magnetic forces are fixedly connected inside the limiting plate; during operation, by utilizing the mutually attracting magnetic force effect between the support rod and the limiting plate in this step, the friction force between the support rod and the limiting plate can be increased, and further the scraping effect of the scraping plate on impurities can be increased.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention provides a device for detecting the wear thickness of an automotive clutch disc, which accurately measures the thickness of the detection target by utilizing the change in inductance, realizes a high-precision detection target, makes the actual position error less than the insulating housing %, and meets the requirements of high-accuracy long-distance ranging.

[0020] 2. The present invention provides a device for detecting the wear thickness of an automotive clutch disc. By utilizing the contact effect between a scraping plate and a magnetically conductive metal rod, during the movement of the magnetically conductive metal rod, cleaning operations can be performed on the surface of the magnetically conductive metal rod, reducing the entry of dust and impurities into the interior of the solenoid along with the magnetically conductive metal rod, which may affect the detection results. At the same time, it reduces the accumulation of dust and impurities between the interior of the solenoid and the magnetically conductive metal rod, which may affect the normal movement of the magnetically conductive metal rod in the subsequent process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 is a perspective view of the first embodiment;

[0023] Figure 2 is a schematic diagram of the internal structure of the insulating housing of the first embodiment;

[0024] Figure 3 is a perspective cross-sectional view of the connecting plate of the first embodiment;

[0025] Figure 4 is a schematic diagram of the structure of the connecting plate of the first embodiment;

[0026] Figure 5 is a perspective view of the roller of the first embodiment;

[0027] Figure 6 is a perspective view of the second embodiment;

[0028] Legend Explanation:

[0029] 1. Insulating housing; 11. Solenoid; 12. Magnetically conductive metal rod; 13. Output cable; 14. Circuit board; 2. Connecting plate; 21. Support rod; 22. Scraping plate; 23. Positioning plate; 3. First chute; 31. Limiting plate; 32. Rubber plate; 4. Second chute; 41. Cleaning plate; 42. Connecting band; 5. Third chute; 51. Fourth chute; 52. Brush; 6. Roller; 61. First hair removal hook; 62. Second hair removal hook; 7. Fifth chute. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1

[0032] Please refer to Figures 1-5 As shown in the figure, a wear thickness detection device for an automobile clutch plate includes an insulating housing 1; a solenoid 11 is fixedly connected to a side wall of the insulating housing 1; a magnetically conductive metal rod 12 is slidably connected to an end of the solenoid 11; a circuit board 14 is fixedly connected inside the insulating housing 1; an output cable 13 is fixedly connected to the bottom end of the insulating housing 1; the output cable 13 is connected to the circuit board 14; during operation, when a worker needs to detect the wear thickness of an automobile clutch plate, the presence of the magnetically conductive metal rod 12 can be utilized. Through the movement of the magnetically conductive metal rod 12, the inductance of the coil inside the solenoid 11 changes. The internal sensor detects the weak inductance change to detect the displacement change. Different wear thicknesses of the clutch will cause the magnetically conductive metal rod 12 to enter the solenoid 11 to different depths, resulting in different inductances of the inductance coil. By accurately calculating the inductance of the inductance coil, the current position can be obtained. This step uses the inductance change to accurately measure the thickness of the detection target, achieving a high-precision detection target, making the actual position error less than 1% of the insulating housing, and meeting the requirements of high-accuracy long-distance ranging..

[0033] The circuit board 14 integrates a temperature sensor inside, which can accurately detect the accurate temperature within -40 degrees to 100 degrees. The matrix compensation algorithm is adopted for temperature compensation of inductance. The actual displacement accuracy of the metal rod will not change due to temperature changes, so that within the temperature range, the accuracy is less than 0.1 mm;

[0034] Combined with the adaptive temperature high-precision compensation algorithm, the temperature drift within the temperature range (-40 degrees - 100 degrees) is 0.5%;

[0035] The phasor method is used to accurately measure the impedance of the inductance coil, and then the inductance of the coil is calculated according to the AC impedance. The calculation formula is Z = R + jXL = R + jwL = R + j2πfL

[0036] By adding a sine wave with a certain frequency to the inductance coil and amplifying it in a virtual manner using an operational amplifier. After amplification, A / D conversion is adopted to obtain the amplitude and phase of the AC voltage and current signals of the inductance coil, and the AC impedance of the inductance coil can be accurately calculated. According to XL = 2*Pi*f*L, the inductance of the coil is calculated, and finally the current accurate inductance value is calculated. Through multi-point position calibration and high-low temperature adaptive matrix temperature compensation, the current displacement can be calculated, and thus the wear thickness of the clutch can be obtained;

[0037] Moreover, the wear displacement output of the vehicle clutch adopts a full-digital interface to supply real-time data to the vehicle ECU or other interfaces. Additionally, when detecting the displacement, the stepping and lifting actions of the clutch disc are detected and signal outputs are given. When the wear of the clutch disc reaches the set value, an alarm output is given.

[0038] A connecting plate 2 is fixedly connected to the end of the solenoid 11; a plurality of support rods 21 are slidably connected to the end of the connecting plate 2; a plurality of scraping plates 22 are fixedly connected to the ends of the support rods 21; the scraping plates 22 are sleeved on the outer side wall of the magnetically conductive metal rod 12; a plurality of positioning plates 23 are fixedly connected to the side walls of the support rods 21. During operation, during the movement of the magnetically conductive metal rod 12, the scraping plates 22 sleeved on the outer side wall of the magnetically conductive metal rod 12 can scrape and clean the dust and impurities existing on the surface of the magnetically conductive metal rod 12 under the support of the support rods 21. This step utilizes the contact effect between the scraping plates 22 and the magnetically conductive metal rod 12 to clean the surface of the magnetically conductive metal rod 12 during the movement of the magnetically conductive metal rod 12, reducing the influence of dust and impurities following the magnetically conductive metal rod 12 into the interior of the solenoid 11 on the detection result, and at the same time reducing the accumulation of dust and impurities between the interior of the solenoid 11 and the magnetically conductive metal rod 12, which affects the normal movement of the subsequent magnetically conductive metal rod 12.

[0039] A plurality of first chutes 3 are formed in the side walls of the support rods 21; a pair of limiting plates 31 are arranged on the inner side wall of the connecting plate 2; the limiting plates 31 and the inner side wall of the connecting plate 2 are connected by rubber plates 32. During operation, during the movement of the magnetically conductive metal rod 12, when facing relatively sticky and tightly adhered impurities, the support rods 21 will move inside the connecting plate 2. At this time, the limiting plates 31 will move under the opening of the first chutes 3 on the side walls of the support rods 21, causing partial shaking of the support rods 21 to remove the adhered impurities. This step utilizes the vibration effect generated during the movement of the support rods 21 to loosen and clean the relatively tightly adhered impurities, enabling them to be smoothly removed, reducing the situation of following the magnetically conductive metal rod 12 into the interior of the solenoid 11, and improving the stability of the equipment during operation.

[0040] A plurality of second chutes 4 are provided on the inner side wall of the connecting plate 2; a plurality of cleaning plates 41 are fixedly connected to the end of the connecting plate 2; the side wall of the cleaning plate 41 contacts the surface of the support rod 21; a connecting belt 42 is fixedly connected to the end of the limiting plate 31; the other end of the connecting belt 42 passes through the second chute 4 and is fixedly connected to the middle side wall of the cleaning plate 41; during operation, during the movement of the support rod 21, the limiting plate 31 moves under the extrusion effect, pulling the connecting belt 42, so that the connecting belt 42 exerts a pulling effect on the middle of the cleaning plate 41, making the end of the connecting belt 42 fit more closely to the side wall of the support rod 21, blocking the dust and impurities existing on the side wall of the support rod 21. This step utilizes the movement effect of the support rod 21, enabling the limiting plate 31 to exert a pulling effect on the cleaning plate 41 during movement, driving the cleaning plate 41 to fit on the side wall of the support rod 21, increasing the friction force on the support rod 21, and at the same time enabling the cleaning plate 41 to block the dust and impurities existing on the support rod 21, reducing the situation where dust and impurities enter the inside of the connecting plate 2 and causing jamming.

[0041] A third chute 5 is provided on the side wall of the contact between the scraping plate 22 and the magnetically conductive metal rod 12; a fourth chute 51 is provided on the side wall of the third chute 5; a pair of brush hairs 52 are fixedly connected to the side wall of the fourth chute 51; during operation, during the movement of the magnetically conductive metal rod 12, a pair of brush hairs 52 installed on the side wall of the scraping plate 22 can contact the side wall of the magnetically conductive metal rod 12, cleaning and blocking the omitted impurities scraped off by the scraping plate 22, enabling the magnetically conductive metal rod 12 to smoothly enter the inside of the solenoid 11. This step utilizes the cleaning effect of the brush hairs 52 on the surface of the magnetically conductive metal rod 12, reducing the situation where the remaining impurities enter the inside of the solenoid 11 after the scraping plate 22 scrapes the impurities on the magnetically conductive metal rod 12, maintaining the smooth movement degree of the magnetically conductive metal rod 12, and improving the movement accuracy of the device.

[0042] A roller 6 is rotatably connected to the inner side wall of the third chute 5; the roller 6 contacts the surface of the magnetically conductive metal rod 12; a plurality of first hair removal hooks 61 are fixedly connected to the outer side wall of the roller 6; a pair of second hair removal hooks 62 are fixedly connected to both sides of the roller 6 on the side wall of the third chute 5; during operation, during the movement of the magnetically conductive metal rod 12, the roller 6 rotates by itself, enabling a plurality of first hair removal hooks 61 to contact the surface of the magnetically conductive metal rod 12, cleaning the adhered lint existing on the surface of the magnetically conductive metal rod 12. At this time, as the roller 6 rotates, the first hair removal hooks 61 will contact the second hair removal hooks 62, enabling the second hair removal hooks 62 to clean the lint existing on the first hair removal hooks 61. This step utilizes the contact between the roller 6 and the magnetically conductive metal rod 12 to remove the lint existing on the magnetically conductive metal rod 12, reducing the lint from entering the inside of the connecting plate 2 along with the magnetically conductive metal rod 12 and causing accumulation, affecting the normal movement of the subsequent magnetically conductive metal rod 12.

[0043] A plurality of magnets are fixedly connected inside the support rod 21, and the same group of magnets with mutually attracting magnetic forces are fixedly connected inside the limiting plate 31; during operation, in the process of the movement of the support rod 21, with the sliding between the limiting plate 31 and the support rod 21, the fitting between the limiting plate 31 and the support rod 21 can be driven to be closer. In this step, by using the effect of the mutually attracting magnetic forces between the support rod 21 and the limiting plate 31, the friction force between the support rod 21 and the limiting plate 31 can be increased, and further the effect of the scraper 22 for removing impurities can be increased.

[0044] Embodiment 2

[0045] Please refer to Figure 6 As shown, compared with Embodiment 1, as another implementation manner of the present invention, a plurality of fifth sliding grooves 7 are provided on the contact surface between the scraper 22 and the magnetically conductive metal rod 12; during operation, in the process of the movement of the magnetically conductive metal rod 12, the provision of the plurality of fifth sliding grooves 7 on the side wall of the scraper 22 can increase the contact area with the impurities when the scraper 22 comes into contact with the adhered impurities, and at the same time scrape the same impurities multiple times. In this step, by using the provision of the fifth sliding grooves 7 on the side wall of the scraper 22, the scraping of the impurities can be further completed, and the accumulation of the impurities, which affects the normal movement of the magnetically conductive metal rod 12, can be reduced.

[0046] Working principle: When the staff needs to detect the wear thickness of the automobile clutch plate, the magnetic metal rod 12 can be used to change the inductance of the coil inside the spiral tube 11 through the movement of the magnetic metal rod 12. The internal sensor detects the slight change in inductance to detect the change in displacement. The different wear thickness of the clutch will cause the magnetic metal rod 12 to enter the spiral tube 11 at different depths, resulting in different inductance of the inductor coil. By accurately calculating the inductance of the inductor coil, the current position can be obtained. During the movement, the scraper 22 sleeved on the outer side wall of the magnetic metal rod 12 can scrape and clean the dust and impurities on the surface of the magnetic metal rod 12 under the support of the support rod 21. During the movement of the magnetic metal rod 12, when facing impurities that are more adhered and more tightly, the support rod 21 will move inside the connecting plate 2. At this time, the limiting plate 31 will move under the opening of the No. 1 slide groove 3 on the side wall of the support rod 21, so that the support rod 21 will produce a partial shaking effect to remove the adhered impurities. During the movement of the support rod 21, the limiting plate 31 The plate 31 moves under the extrusion effect, pulling the connecting belt 42, so that the connecting belt 42 exerts a pulling effect on the middle part of the cleaning plate 41, so that the end of the connecting belt 42 and the side wall of the support rod 21 are more closely fitted, and the dust and impurities on the side wall of the support rod 21 are blocked. During the movement of the magnetic metal rod 12, a pair of brushes 52 installed on the side wall of the scraper 22 can contact the side wall of the magnetic metal rod 12, and clean and block the missed impurities shoveled by the scraper 22, so that the magnetic metal rod 12 can smoothly enter the interior of the spiral tube 11, and the magnetic metal rod 12 can be moved to the side wall of the magnetic metal rod 12. During the movement of 12, the roller 6 can use its own rotation to make multiple groups of No. 1 hair removal hooks 61 contact with the surface of the magnetic metal rod 12, and clean the hair debris adhering to the surface of the magnetic metal rod 12. At this time, with the rotation of the roller 6, the No. 1 hair removal hook 61 will contact the No. 2 hair removal hook 62, so that the No. 2 hair removal hook 62 cleans the hair debris on the No. 1 hair removal hook 61. During the movement of the support rod 21, with the sliding between the limit plate 31 and the support rod 21, the limit plate 31 and the support rod 21 can be driven to fit more closely.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A detection device for the wear thickness of an automotive clutch disc, comprising an insulating housing (1); a solenoid (11) is fixedly connected to one side wall of the insulating housing (1); a magnetically conductive metal rod (12) is slidably connected to the end of the solenoid (11); characterized in that: A circuit board (14) is fixedly connected inside the insulating housing (1); an output cable (13) is fixedly connected to the bottom end of the insulating housing (1); the output cable (13) is connected to the circuit board (14). A connecting plate (2) is fixedly connected to the end of the solenoid (11); multiple support rods (21) are slidably connected to the end of the connecting plate (2); scrapers (22) are fixedly connected to the ends of multiple support rods (21); the scrapers (22) are sleeved on the outer side wall of the magnetically conductive metal rod (12); positioning plates (23) are fixedly connected to the side walls of multiple support rods (21). Multiple first chutes (3) are formed in the side wall of the support rod (21); a pair of limiting plates (31) are arranged on the inner side wall of the connecting plate (2); the limiting plates (31) and the inner side wall of the connecting plate (2) are connected by a rubber plate (32).

2. The detection device for the worn thickness of an automotive clutch disc according to claim 1, characterized in that: A temperature sensor is integrated inside the circuit board (14), which can accurately detect the accurate temperature within -40 degrees to 100 degrees. The matrix compensation algorithm is adopted for temperature compensation of the inductance. The actual displacement accuracy of the metal rod will not change due to temperature changes, so that within the temperature range, the accuracy is less than 0.1 mm. With the adaptive temperature high-precision compensation algorithm, the temperature drift is 0.5% within the temperature range of (-40 degrees - 100 degrees). Use the phasor method to accurately measure the impedance of the inductance coil, and then calculate the inductance of the coil according to the AC impedance. The calculation formula ; By applying a sine wave of a certain frequency to the inductance coil and amplifying it in a virtual manner using an operational amplifier. After amplification, A / D conversion is used to obtain the amplitudes and phases of the AC voltage and current signals of the inductance coil, and the AC impedance of the inductance coil can be accurately calculated. According to , the inductance of the coil is calculated, and finally the current accurate inductance value is calculated. Through multi-point position calibration and high and low temperature adaptive matrix temperature compensation, the current displacement can be calculated, and thus the wear thickness of the clutch can be obtained; Moreover, the output of the wear displacement of the automotive clutch adopts a full digital interface, which supplies real-time data to the automotive ECU or other interfaces. In addition, when detecting the displacement, the actions of stepping on and lifting the clutch disc are detected, and a signal output is given. When the wear of the clutch disc reaches the set value, an alarm output is given.

3. The detection device for the worn thickness of an automotive clutch disc according to claim 2, wherein: Multiple second chutes (4) are formed in the inner side wall of the connecting plate (2); multiple cleaning plates (41) are fixedly connected to the end of the connecting plate (2); the side wall of the cleaning plate (41) contacts the surface of the support rod (21); a connecting belt (42) is fixedly connected to the end of the limiting plate (31); the other end of the connecting belt (42) passes through the second chute (4) and is fixedly connected to the middle side wall of the cleaning plate (41).

4. The detecting device for the worn thickness of an automotive clutch disc according to claim 3, characterized in that: A third chute (5) is formed in the contact side wall between the scraper (22) and the magnetically conductive metal rod (12); a fourth chute (51) is formed in the side wall of the third chute (5); a pair of brushes (52) are fixedly connected to the side wall of the fourth chute (51).

5. The detection device for the wear thickness of an automotive clutch disc according to claim 4, characterized in that: A roller (6) is rotatably connected to the inner side wall of the third chute (5); the roller (6) contacts the surface of the magnetically conductive metal rod (12); multiple first hair-removing hooks (61) are fixedly connected to the outer side wall of the roller (6); a pair of second hair-removing hooks (62) are fixedly connected to the side wall of the third chute (5) on both sides of the roller (6).

6. The detecting device for the worn thickness of an automobile clutch disc according to claim 5, characterized in that: Multiple magnets are fixedly connected inside the support rod (21), and the same group of magnets with mutually attracting magnetic forces are fixedly connected inside the limiting plate (31).

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