A non-contact displacement sensor automatic testing equipment

Abstract

The present invention belongs to the field of electromechanical technology, and discloses a non-contact displacement sensor automatic test equipment, including a test equipment and a test bench; the test equipment is composed of a sheave mechanism, a linear reciprocating motion mechanism, a bracket, a bearing, a bevel gear set, a motor seat cover, a servo motor, a precision displacement sensor, a conductive slip ring, etc.; the test bench is composed of a power supply module, a motor control module, a data acquisition module, a display module and an operation panel. During testing, multiple products under test are installed on the test equipment, and the sheave mechanism and the linear reciprocating motion mechanism are driven by the servo motor through the bevel gear set to achieve relative displacement between the sensing element and the product and product transposition. The product is powered by a conductive slip ring, and the contact point position is set to ensure that the product facing the sensing element is energized. The output of the precision displacement sensor and the signal output of the product under test are collected by the data acquisition module and displayed by the display module.

Description

Technical Field

[0001] The present invention relates to the field of automatic testing of sensors, and in particular to automatic testing equipment for non-contact displacement sensors. Background Art

[0002] The performance of non-contact displacement sensors has a decisive impact on the functional implementation and performance reliability of products using them. However, due to the complex operating environments of sensors, testing sensor performance in different operating environments is crucial. Traditional sensor performance testing methods involve manual testing using a fixture with a constant voltage power supply, a multimeter, and a vernier caliper. This testing method suffers from low efficiency and is unable to perform dynamic testing in extreme environments. The wide range of applications and high volume of non-contact displacement sensors pose significant challenges to sensor performance testing. There is an urgent need for testing equipment that can improve test efficiency, meet the requirements for testing in extreme environments, and test the dynamic performance of sensors. Summary of the Invention

[0003] The purpose of the present invention is to provide a non-contact displacement sensor automatic testing equipment to improve the efficiency of sensor performance testing and realize performance testing and dynamic response testing of sensors in extreme environments such as high and low temperatures, low air pressure, and strong radiation.

[0004] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0005] A non-contact displacement sensor automatic testing device comprises a bracket and a grooved wheel mechanism installed on the bracket;

[0006] The bracket is a frame structure, and the sheave mechanism is installed in the bracket. It includes a sheave disc and a drive disc that cooperates with the sheave disc. The sheave disc has multiple arc grooves distributed on its circumference, and slide grooves are processed radially between adjacent arc grooves. The surface of the drive disc is provided with a semicircular annular boss, and a drive rod is provided on the opposite side of the boss.

[0007] The surface of the groove wheel is machined with multiple product mounting grooves along the circumference for mounting the product under test. A conductive slip ring is coaxially arranged on the groove wheel, and the conductive slip ring includes an internal terminal and an external terminal ring. The terminal is fixed, and the terminal ring can rotate with the groove wheel. The terminal is connected to the power line, signal line, and ground line, respectively, and three contacts corresponding to the power line, signal line, and ground line are led out from the terminal. Conductive areas corresponding to the product mounting grooves are evenly distributed on the circumference of the terminal ring. The inner ends of the conductive areas pass through the inner surface of the terminal ring, and the outer ends lead out a power line terminal, a signal line terminal, and a ground line terminal, which are respectively connected to the power line, signal line, and ground line of the product under test in the corresponding product mounting groove.

[0008] The three contacts on the terminal point to the position to be measured. When the product to be measured in a product installation slot rotates to the position to be measured, its corresponding conductive area contacts the three contacts, thereby putting the sensor into working state.

[0009] Furthermore, a linear reciprocating motion mechanism is provided above the position to be measured, and a sensing element seat is provided at the end of the linear reciprocating motion mechanism. The sensing element seat contains a sensing element. When the sensing element seat approaches the product to be measured, the product to be measured will interact with the sensing element and output a current / voltage signal, which is converted into a first displacement after signal processing.

[0010] Furthermore, a displacement sensor is installed on the linear reciprocating motion mechanism. When the sensing element seat is in relative motion with the product to be measured, the precision displacement sensor detects the motion displacement of the sensing element seat and outputs a second current / voltage signal, which is converted into a second displacement after signal processing; by comparing the first displacement and the second displacement, the measurement accuracy of the sensor to be measured is obtained.

[0011] Furthermore, the position of the sensing element seat when the linear reciprocating motion mechanism moves to the uppermost end is defined as the zero position of the measuring device.

[0012] Furthermore, the linear reciprocating motion mechanism and the grooved wheel mechanism are matched with the same bevel gear set; under the drive of the servo motor, the bevel gear set ensures that the driving disk in the grooved wheel mechanism rotates 360° every time the linear reciprocating motion mechanism completes a cycle of linear reciprocating motion through the engagement between the bevel gears.

[0013] Furthermore, in the process of coordinated movement of the driving disc and the groove pulley, there are two states: measurement and switching; when the semi-circular boss on the driving disc is in arc-surface contact with the arc groove on the groove pulley, it is in the measuring state, the groove pulley does not rotate, the position of the measured product remains unchanged, and the sensing element seat is close to the measured product in the linear reciprocating motion mechanism to perform displacement measurement; when the driving rod slides into the groove on the groove pulley, it enters the switching state, the driving rod drives the groove pulley to rotate a certain angle, and moves the next measured product circumferentially to the position to be measured; every time the driving disc rotates 360°, the groove pulley mechanism completes a measurement-switching action.

[0014] Furthermore, the driving rod is arranged 180 degrees apart from the center of the boss; and the conductive area and the non-conductive area of the wiring ring are arranged alternately.

[0015] Furthermore, the working process of the non-contact displacement sensor automatic testing equipment is as follows:

[0016] First, remove the groove wheel with the conductive slip ring, and place the product to be tested in the product installation slot of the groove wheel in sequence. Then, connect the product lead wires to the wiring ring on the conductive slip ring according to the sequence and wiring definition. After the connection is completed, install the groove wheel back to the bracket, connect the servo motor and the connecting rod through the coupling, and the end of the connecting rod is used to drive the bevel gear set.

[0017] Connect the communication cable to the test bench, which is equipped with a power supply module, motor control module, data acquisition module, display module, and operation panel. Turn on the power and flip the zero position switch on the operation panel. The motor control module controls the linear reciprocating motion mechanism to drive the sensing element seat to the top of the reciprocating stroke, i.e., the zero position. After returning to zero, flip the automatic test switch to start the automatic test:

[0018] First, the linear reciprocating motion mechanism moves downward, driving the sensing element seat to move downward and approach the product under test. At this time, the groove wheel mechanism is in the measuring state, and the product under test remains stationary. During this process, the data acquisition module collects the feedback signals of the precision displacement sensor and the product under test in real time, and outputs them to the display module after processing and calculation, and displays the measured displacement delta measured by the precision displacement sensor and the product under test on the display screen at the same time; after the downward stroke is completed, the linear reciprocating motion mechanism starts to move upward, and at the end of the upward stroke, the driving rod slides into the groove on the groove wheel disc and enters the switching state. The groove wheel disc rotates a certain angle, and the next product under test is switched to the position to be tested; the linear reciprocating motion mechanism moves until it returns to zero position, and then the next test is started; this cycle is repeated until all the products under test on the groove wheel disc are tested.

[0019] Furthermore, before conducting tests under high and low temperature environments, the product to be tested is installed on the groove pulley, and the product leads are connected to the conductive slip ring; the test equipment except for the motor seat cover and the servo motor is placed inside the temperature test chamber, and the adjustable feet at the bottom of the bracket are adjusted to make the connecting rod extend from the sealed circular hole on the side of the temperature chamber, the motor seat cover is put on the connecting rod, and the adjustable feet are adjusted to make the motor seat cover coaxial with the sealed circular hole, and the cover is installed in the hole; then the servo motor and the connecting rod are connected through a coupling, and the servo motor is installed on the motor seat; a graphite sealing ring is provided at the connection part between the motor shaft and the coupling, and a rubber sealing ring is provided between the servo motor and the motor seat; the communication cable is connected to the test bench.

[0020] Compared with the prior art, the present invention has the following technical features:

[0021] Manual measurement is eliminated, test errors caused by human actions are avoided, and test accuracy is improved; multiple products are measured sequentially after one installation, and the next one is automatically replaced after the test of a single product is completed, which improves test efficiency; automatic testing of non-contact displacement sensors in extreme environments such as high and low temperatures, low air pressure, and strong radiation is achieved; and the problem of being unable to test the dynamic response performance of the sensor is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the overall structural diagram of the automatic testing equipment for non-contact displacement sensors;

[0023] Figure 2 It is a structural diagram of the test equipment;

[0024] Figure 3 This is a diagram of the test bench;

[0025] Figure 4 It is the structural diagram of the grooved wheel mechanism;

[0026] Figure 5 It is the structural diagram of the conductive slip ring;

[0027] Figure 6 It is the structural diagram of the linear reciprocating motion mechanism;

[0028] Figure 7 This is the structural diagram of the motor seat cover;

[0029] Figure 8 It is a schematic diagram of the displacement measurement principle;

[0030] Figure 9 This is a schematic diagram of the control panel.

[0031] Explanation of the numbers in the figure: 1 grooved wheel mechanism, 2 measured product, 3 conductive slip ring, 4 precision displacement sensor, 5 bevel gear set, 6 bracket, 7 bearing, 8 motor seat cover, 9 servo motor, 10 connecting rod, 11 linear reciprocating motion mechanism, 12 sensing element seat, 13 adjustable support foot, 14 power supply module, 15 motor control module, 16 data acquisition module, 17 display module, 18 operation panel, 19 grooved wheel disc, 191 arc groove, 192 slide groove, 20 drive disc, 201 boss, 21 drive rod, 22 product mounting groove, 23 terminal, 24 terminal ring, 25 contact, 26 coupling, 27 rubber sealing ring, 28 graphite sealing ring, 29 motor seat, 30 sensing surface, 31 sensing element, delta measured displacement. DETAILED DESCRIPTION

[0032] The present invention provides an automatic testing device for a non-contact displacement sensor, comprising a sheave mechanism 1, a product to be tested (displacement sensor) 2, a conductive slip ring 3, a displacement sensor 4, a bevel gear set 5, a bracket 6, a bearing 7, a motor seat cover 8, a servo motor 9, a connecting rod 10, a linear reciprocating motion mechanism 11, a sensing element seat 12, an adjustable support foot 13, a power supply module 14, a motor control module 15, a data acquisition module 16, a display module 17, an operating panel 18, a sheave disc 19, a drive disc 20, a drive rod 21, a product mounting slot 22, an inner terminal 23, an outer terminal ring 24, a contact 25, and a sensing element 31, wherein:

[0033] The bracket 6 is a frame structure, and the sheave mechanism 1 is installed in the bracket 6, which includes a sheave disc 19 and a drive disc 20 that cooperates with the sheave disc 19; a plurality of arc grooves 191 are distributed on the circumference of the sheave disc 19, and a slide groove 192 is processed radially between adjacent arc grooves 191; a semicircular annular boss 201 is provided on the surface of the drive disc 20, and a driving rod 21 is provided on the opposite side of the boss 201; the driving rod 21 is arranged 180° apart from the center of the boss; a plurality of product mounting grooves 22 are processed along the circumferential direction on the surface of the sheave disc 19 for mounting the product 2 to be tested; a coaxial groove 20 is provided on the sheave disc 19 The conductive slip ring 3 includes an internal terminal 23 and an external terminal ring 24, wherein the terminal 23 is fixed and the terminal ring 24 can rotate with the groove wheel 19; the terminal 23 is connected to the power line, the signal line and the ground line respectively, and three contacts 25 corresponding to the power line, the signal line and the ground line are led out from the terminal 23; the circumference of the terminal ring 24 is evenly distributed with conductive areas corresponding to the product installation groove 22; the conductive areas and non-conductive areas of the terminal ring are arranged alternately, the inner end of the conductive area passes through the inner surface of the terminal ring, and the outer end leads out a power line terminal, a signal line terminal and a ground terminal, and respectively The sensor is connected to the power line, signal line and ground line of the product under test 2 in the corresponding product installation slot 22; the three contacts 25 on the terminal point to the position to be tested. When the product under test 2 in a product installation slot 22 rotates to the position to be tested, its corresponding conductive area can contact the three contacts, so that the sensor is in working state; a linear reciprocating motion mechanism 11 is provided above the position to be tested, and a sensing element seat 12 is provided at the end of the linear reciprocating motion mechanism 11; the sensing element 31 is installed in the sensing element seat 12. When the sensing element seat 12 approaches the product under test 2, the product under test 2 will contact the sensing element 31. 1 interacts with each other and outputs a current / voltage signal, which is converted into a first displacement after signal processing. A high-precision precision displacement sensor 4 is installed on the linear reciprocating motion mechanism 11. When the sensing element base 12 moves relative to the measured product 2, the precision displacement sensor 4 detects the movement displacement of the sensing element base 12 and outputs a second current / voltage signal, which is converted into a second displacement after signal processing. The measurement accuracy of the sensor to be measured is obtained by comparing the first and second displacements. The position of the sensing element base 12 when the linear reciprocating motion mechanism 11 moves to the uppermost end is defined as the zero position of the measuring device.The linear reciprocating motion mechanism 11 and the sheave mechanism 1 cooperate with the same bevel gear set 5. Driven by the servo motor 9, the bevel gear set 5 ensures that the driving disc 20 in the sheave mechanism 1 rotates 360° every time the linear reciprocating motion mechanism 11 completes one cycle of linear reciprocating motion through the meshing between the bevel gears. During the coordinated movement of the driving disc 20 and the sheave disc 19, there are two states: measurement and switching. When the semi-circular boss on the driving disc 20 contacts the arc groove on the sheave disc 19 in an arc surface, it is in the measurement state, the sheave disc 19 does not rotate, the position of the measured product 2 remains unchanged, and the sensing element seat 12 approaches the measured product 2 in the linear reciprocating motion mechanism 11 to perform displacement measurement. When the driving rod 21 slides into the sliding groove on the sheave disc 19, it enters the switching state, and the driving rod 21 drives the sheave disc 19 to rotate a certain angle, moving the next measured product 2 along the circumferential direction to the position to be measured. Every time the driving disc 20 rotates 360°, the sheave mechanism 1 completes a measurement-switching action.

[0034] Before the normal temperature test, install the sensor 2 to be tested on the grooved wheel 19 and connect the lead to the conductive slip ring. Do not install the motor seat cover 8, connect the servo motor 9 to the connecting rod through the coupling 26, and add supports at an appropriate height. Connect the communication cable to the test bench. Power on the equipment and control the linear reciprocating motion mechanism to perform the zeroing operation until it returns to the zero position. Toggle the automatic test switch, the test equipment starts running, the display shows the test results in real time, records the feedback values of the tested product and the precision displacement sensor, and automatically replaces the next one until the test is completed.

[0035] The following is combined with Figure 1 ~Attached Figure 9 A specific implementation of an embodiment of a non-contact displacement sensor automatic testing device is described in detail:

[0036] First, remove the groove wheel 19 equipped with the conductive slip ring 3, and place the product 2 to be tested in the product installation slot 22 of the groove wheel 19 in sequence, and then connect the product lead wires to the wiring ring 24 on the conductive slip ring 3 according to the sequence and wiring definition; after the connection is completed, install the groove wheel back on the bracket 6, do not install the motor seat cover 8, connect the servo motor 9 and the connecting rod 10 through the coupling 26, the end of the connecting rod 10 is used to drive the bevel gear set 5, and add supports at an appropriate height, and install the bearing 7 on the part passing through the bracket 6; connect the communication cable to the test bench, which is equipped with a power supply module 14, a motor control module 15, a data acquisition module 16, a display module 17 and an operation panel 18; turn on the power, toggle the zero position switch on the operation panel 18, and the motor control module 15 controls the linear reciprocating motion mechanism 11 to drive the sensing element seat 12 to move to the uppermost end of the reciprocating stroke, that is, the zero position. After returning to zero, the automatic test switch is toggled to initiate automatic testing. First, the linear reciprocating mechanism 11 moves downward, driving the sensing element holder 12 downward toward the product 2 being tested. At this point, the sheave mechanism 1 is in the measuring state, while the product 2 remains stationary. During this process, the data acquisition module 16 collects real-time feedback signals from the precision displacement sensor 4 and the product 2 being tested. After processing and calculation, the data acquisition module 16 outputs these signals to the display module 17, which simultaneously displays the measured displacement delta values of both the precision displacement sensor 4 and the product 2 being tested. At the end of the downward stroke, the linear reciprocating mechanism 11 begins upward movement. At the end of the upward stroke, the drive rod 21 slides into the slot on the sheave disc 19, entering the switching state. The sheave disc 19 rotates a certain angle, and the next product 2 being moved to the test position. The linear reciprocating mechanism continues until it returns to zero, and testing begins on the next product 2. This cycle continues until all products 2 on the sheave disc 19 have been tested.

[0037] Combined with attachment Figure 1 The overall structure of the automatic test equipment for non-contact displacement sensors is described. The automatic test equipment for non-contact displacement sensors mainly consists of two parts: a test equipment and a test bench. The test equipment and the test bench are connected by a communication cable. The product under test is installed on the test equipment. After the motor control module 15 on the test bench receives the control instruction, it transmits the control signal to the test equipment through the communication cable. After the servo motor 9 on the test equipment receives the signal, it drives the mechanism in the test equipment to start the test. The product under test 2 and the precision displacement sensor 4 provide real-time feedback output signals, which are transmitted back to the test bench through the communication cable. After processing the feedback signal, the data acquisition module of the test bench outputs the real-time relative displacement between the sensing surface 30 and the sensing element 31 of the product under test 2 measured by the product under test and the precision displacement sensor respectively, and displays it through the display module 17.

[0038] Before testing in high and low temperature environments, the product under test 2 is mounted on the grooved wheel 19, and the product leads are connected to the conductive slip ring 3. The test equipment, excluding the motor seat cover 8 and the servo motor 9, is placed inside the temperature test chamber. Adjust the adjustable foot 13 at the bottom of the bracket 6 so that the connecting rod extends from the sealed circular hole on the side of the temperature chamber. Put the motor seat cover 8 on the connecting rod 10, adjust the adjustable foot 13 so that the motor seat cover 8 is coaxial with the sealed circular hole, and install the cover into the hole. Then connect the servo motor 9 to the connecting rod 10 through the coupling 26, and install the servo motor 9 on the motor seat 29; wherein, a graphite sealing ring 28 is set at the connection between the motor shaft and the coupling 26, and a rubber sealing ring 27 is set between the servo motor 9 and the motor seat 29; connect the communication cable to the test bench. In the high and low temperature environment, the equipment is powered on and the linear reciprocating motion mechanism 11 is controlled to perform the zero return operation until it returns to zero position. By turning on the automatic test switch, the test equipment starts running, and the display shows the real-time feedback values of the tested product 2 and the precision displacement sensor 4. After the test of the first tested product 2 is completed, the next one is automatically replaced until the test is completed.

[0039] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A non-contact displacement sensor automatic testing equipment, characterized in that: It comprises a bracket (6) and a sheave mechanism (1) mounted on the bracket (6); The bracket (6) is a frame-type structure, and the sheave mechanism (1) is installed in the bracket (6), which includes a sheave disc (19) and a driving disc (20) matched with the sheave disc (19); a plurality of arc-shaped grooves (191) are distributed on the circumference of the sheave disc (19), and a sliding groove (192) is processed radially between adjacent arc-shaped grooves (191); a semicircular annular boss (201) is provided on the surface of the driving disc (20), and a driving rod (21) is provided on the opposite side of the boss (201); A plurality of product installation grooves (22) are machined on the surface of the groove wheel (19) along the circumferential direction for installing the product under test (2); a conductive slip ring (3) is coaxially arranged on the groove wheel (19), and the conductive slip ring (3) includes an internal terminal (23) and an external terminal ring (24), wherein the terminal (23) is fixed and the terminal ring (24) can rotate along the groove wheel (19); the terminal (23) is respectively connected to a power line, a signal line and a ground line, and three contacts (25) corresponding to the power line, the signal line and the ground line are led out from the terminal (23); conductive areas corresponding to the product installation grooves (22) are evenly distributed on the circumference of the terminal ring (24); the inner end of the conductive area passes through the inner surface of the terminal ring, and the outer end leads out a power line terminal, a signal line terminal and a ground line terminal, and is respectively connected to the power line, the signal line and the ground line of the product under test (2) in the corresponding product installation groove (22); The three contacts (25) on the terminal (23) point to the position to be measured. When the product to be measured (2) in a product installation slot (22) rotates to the position to be measured, its corresponding conductive area contacts the three contacts, thereby putting the sensor into working state.

2. The non-contact displacement sensor automatic testing equipment according to claim 1, characterized in that: A linear reciprocating motion mechanism (11) is provided above a position to be measured, a sensing element seat (12) is provided at the end of the linear reciprocating motion mechanism (11), and a sensing element (31) is installed in the sensing element seat (12). When the sensing element seat (12) approaches the product to be measured (2), the product to be measured (2) will interact with the sensing element (31) and output a current / voltage signal, which is converted into a first displacement after signal processing.

3. The non-contact displacement sensor automatic testing equipment according to claim 2, characterized in that: A precision displacement sensor (4) is installed on the linear reciprocating motion mechanism (11). When the sensing element seat (12) is in relative motion with the product (2) to be measured, the precision displacement sensor (4) detects the motion displacement of the sensing element seat (12) and outputs a second current / voltage signal, which is converted into a second displacement through signal processing. The measurement accuracy of the sensor to be measured is obtained by comparing the first displacement and the second displacement.

4. The non-contact displacement sensor automatic testing equipment according to claim 2, characterized in that: The position of the sensing element seat (12) when the linear reciprocating motion mechanism (11) moves to the uppermost end is defined as the zero position of the measuring device.

5. The non-contact displacement sensor automatic testing equipment according to claim 2, characterized in that: The linear reciprocating motion mechanism (11) and the grooved wheel mechanism (1) are matched with the same bevel gear set (5); under the drive of the servo motor (9), the bevel gear set (5) ensures that the linear reciprocating motion mechanism (11) completes a cycle of linear reciprocating motion through the meshing between the bevel gears, and the driving disk (20) in the grooved wheel mechanism (1) rotates 360 degrees.

6. The non-contact displacement sensor automatic testing equipment according to claim 1, characterized in that: During the coordinated movement of the driving disc (20) and the groove wheel disc (19), there are two states: measurement and switching. When the semicircular boss on the driving disc (20) contacts the arc groove on the groove wheel disc (19) in an arc surface, the state is in measurement, the groove wheel disc (19) does not rotate, the position of the measured product (2) remains unchanged, and the sensing element seat (12) approaches the measured product (2) in the linear reciprocating motion mechanism (11) to perform displacement measurement. When the driving rod (21) slides into the sliding groove on the groove wheel disc (19), the state enters switching, the driving rod (21) drives the groove wheel disc (19) to rotate a certain angle, and moves the next measured product (2) to the position to be measured along the circumferential direction. Every time the driving disc (20) rotates 360 degrees, the groove wheel mechanism (1) completes a measurement-switching action.

7. The non-contact displacement sensor automatic testing equipment according to claim 1, characterized in that: The driving rod (21) is arranged 180 degrees apart from the center of the boss; the conductive area and the non-conductive area of the wiring ring are arranged alternately.

8. The non-contact displacement sensor automatic testing equipment according to claim 1, characterized in that: The working process of the non-contact displacement sensor automatic testing equipment is as follows: First, remove the groove wheel (19) equipped with the conductive slip ring (3), and place the product (2) to be tested in the product installation groove (22) position of the groove wheel (19) in sequence, and then connect the product lead wire to the connection ring (24) on the conductive slip ring (3) according to the sequence and connection definition; after the connection is completed, install the groove wheel back on the bracket (6), connect the servo motor (9) and the connecting rod (10) through the coupling (26), and the end of the connecting rod (10) is used to drive the bevel gear set (5); The communication cable is connected to a test bench, in which a power supply module (14), a motor control module (15), a data acquisition module (16), a display module (17) and an operation panel (18) are provided; the power is turned on, and the zero position switch on the operation panel (18) is turned on, and the motor control module (15) controls the linear reciprocating motion mechanism (11) to drive the induction element seat (12) to move to the upper end of the reciprocating stroke, i.e., the zero position; after returning to zero, the automatic test switch is turned on to start the automatic test: First, the linear reciprocating motion mechanism (11) moves downward, driving the sensing element seat (12) to move downward and approach the product to be tested (2). At this time, the groove wheel mechanism (1) is in a measuring state, and the product to be tested (2) remains stationary. During this process, the data acquisition module (16) collects the feedback signals of the precision displacement sensor (4) and the product to be tested (2) in real time, and outputs them to the display module (17) after processing and calculation, and simultaneously displays the measured displacement delta measured by the precision displacement sensor (4) and the product to be tested (2) on the display screen; after the downward stroke ends, the linear reciprocating motion mechanism (11) starts to move upward, and at the end of the upward stroke, the driving rod (21) slides into the sliding groove on the groove wheel disc (19), entering the switching state, and the groove wheel disc (19) rotates a certain angle, and the next product to be tested (2) is shifted to the position to be tested; after the linear reciprocating motion mechanism moves until it returns to zero position, the next test starts; this cycle is repeated until all the products to be tested (2) on the groove wheel disc (19) are tested.

9. The non-contact displacement sensor automatic testing equipment according to claim 1, characterized in that: Before the test is carried out under high and low temperature environment, the product to be tested (2) is installed on the groove wheel (19), and the product lead is connected to the conductive slip ring (3); the test equipment except the motor seat cover (8) and the servo motor (9) is placed inside the temperature test box, the adjustable support foot (13) at the bottom of the bracket (6) is adjusted to make the connecting rod (10) extend from the sealing circular hole on the side of the temperature box, the motor seat cover (8) is placed on the connecting rod (10), the adjustable support foot (13) is adjusted to make the motor seat cover (8) coaxial with the sealing circular hole, and the cover is installed in the hole; then the servo motor (9) and the connecting rod (10) are connected through the coupling (26), and the servo motor (9) is installed on the motor seat (29); wherein, a graphite sealing ring (28) is provided at the connection part between the motor shaft and the coupling (26), and a rubber sealing ring (27) is provided between the servo motor (9) and the motor seat (29); and the communication cable is connected to the test bench.

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