Proximity sensor testing device

Abstract

The utility model relates to a proximity sensor testing device, and relates to the technical field of industrial equipment testing. The device comprises a bottom plate, a motor support, a stepping motor, a sensor test plate, a sensor positioning clamp and a displacement sensor. The motor support, the stepping motor, the sensor testing plate, the sensor positioning clamp and the displacement sensor are located above the bottom plate. The stepping motor is fixedly connected with the bottom plate through a motor bracket; the power output end of the stepping motor is connected with the sensor test board, and the stepping motor is used for driving the sensor test board to move; the sensor positioning clamp is opposite to the sensor testing plate, the sensor positioning clamp comprises at least two sensor placing grooves, and the sensor placing grooves are used for placing proximity sensors to be tested. By taking the data measured by the displacement sensor as a reference, whether the data measured by the proximity sensor is accurate or not is further determined, an accurate proximity sensor test result is obtained, and the test process is simplified and the test period is shortened under the condition of ensuring the test accuracy.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial equipment testing, in particular to a proximity sensor testing device. Background Art

[0002] Inductive proximity sensors are sensors that use electromagnetic fields to detect the presence of metal objects. They work by generating a high-frequency magnetic field through a coil in an oscillating circuit inside the sensor. When a metal object approaches this magnetic field, eddy currents are induced in the metal, which creates an opposing magnetic field, changing the inductance of the sensor coil. This change causes the frequency of the oscillating circuit to decrease or even stop oscillating. Both states of oscillation and stop oscillation are detected by the monitoring circuit and converted into a switching signal output.

[0003] There is a great demand for inductive proximity sensors in industrial applications, because they need to test their performance curves. In the related art, the inductive proximity sensors are usually tested piece by piece.

[0004] However, the testing method in the related art has high testing cost and long testing cycle. Summary of the invention

[0005] The utility model relates to a proximity sensor testing device, which can simplify the testing process and shorten the testing cycle. The device comprises a base plate, a motor bracket, a stepper motor, a sensor testing board, a sensor positioning fixture and a displacement sensor;

[0006] The motor bracket, the stepper motor, the sensor test board, the sensor positioning fixture and the displacement sensor are located above the bottom plate;

[0007] The stepper motor is fixedly connected to the base plate through a motor bracket;

[0008] The power output end of the stepper motor is connected to the sensor test board, and the stepper motor is used to drive the sensor test board to move;

[0009] The sensor positioning fixture is opposite to the sensor test board, and the sensor positioning fixture includes at least two sensor placement slots, and the sensor placement slots are used to place the proximity sensor to be tested;

[0010] The displacement sensor is used to determine the displacement of the sensor test plate when the sensor test plate moves.

[0011] In a possible implementation, the motor bracket is implemented as an L-shaped bracket, and the motor bracket is configured with a motor adapter plate;

[0012] The motor adapter board is used for stepper motor communication.

[0013] In a possible implementation, the stepper motor is configured with a motor bearing assembly;

[0014] The motor bearing assembly is used to bear the stepper motor.

[0015] In a possible implementation, the sensor placement groove is implemented as a rectangular groove.

[0016] In a possible implementation, the displacement sensor is implemented as a contact displacement sensor;

[0017] The test end of the displacement sensor is in contact with the sensor test plate.

[0018] In a possible implementation, the displacement sensor is configured with a limit block.

[0019] In a possible implementation, a side of the sensor positioning fixture has a locking plate;

[0020] The sensor positioning fixture is fixedly connected to the base plate through a locking plate.

[0021] In a possible implementation, the sensor positioning fixture is further configured with a cushion seat.

[0022] In a possible implementation, the proximity sensor testing device further includes a communication adapter board;

[0023] When the proximity sensor to be tested is in a testing state, the proximity sensor to be tested is communicatively connected with the communication adapter board.

[0024] The beneficial effects brought by the technical solution provided by the utility model include at least:

[0025] When the device is testing the proximity sensor, a displacement sensor is set for reference. When the stepper motor drives the sensor test board to move, the data measured by the displacement sensor is used as a reference to determine whether the data measured by the proximity sensor is accurate. Accurate proximity sensor test results are obtained, which simplifies the test process and shortens the test cycle while ensuring the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic top view of a proximity sensor testing device provided by an exemplary embodiment of the present application is shown.

[0028] Figure 2A schematic side view of a proximity sensor testing device provided by an exemplary embodiment of the present application is shown.

[0029] The markings in the accompanying drawings are as follows:

[0030] Base plate-1, motor bracket-2, stepper motor-3, sensor test board-4, sensor positioning fixture-5, displacement sensor-6, sensor placement slot-7, motor adapter plate-8, motor bearing assembly-9, limit block-10, locking plate-11, pad seat-12, communication adapter plate-13, baffle-14, sensor bracket-15, foot-16. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the implementation mode of the utility model will be further described in detail below with reference to the accompanying drawings.

[0032] Figure 1 FIG. 1 is a top view schematic diagram of a proximity sensor testing device provided by an exemplary embodiment of the present application, please refer to FIG. Figure 1 , the device includes a base plate 1, a motor bracket 2, a stepper motor 3, a sensor test board 4, a sensor positioning fixture 5 and a displacement sensor 6. The motor bracket 2, the stepper motor 3, the sensor test board 4, the sensor positioning fixture 5 and the displacement sensor 6 are located above the base plate 1. The stepper motor 3 is fixedly connected to the base plate 1 through the motor bracket 2; the power output end of the stepper motor 3 is connected to the sensor test board 4, and the stepper motor 3 is used to drive the sensor test board 4 to move. The sensor positioning fixture 5 is opposite to the sensor test board 4, and the sensor positioning fixture 5 includes at least two sensor placement slots 7, and the sensor placement slots 7 are used to place the proximity sensor to be tested; the displacement sensor 6 is used to determine the displacement of the sensor test board 4 when the sensor test board 4 moves.

[0033] It should be noted that in the embodiment of the present application, the data obtained by the displacement sensor 6 test and the data obtained by the proximity sensor to be tested are both intuitive distance data. After a simple comparison, it is possible to determine whether the measurement data of the proximity sensor to be tested is accurate by using the displacement sensor as a reference.

[0034] Next, the various structures involved in the embodiments of the present application are described:

[0035] In a possible implementation, the motor bracket 2 is implemented as an L-shaped bracket, and the motor bracket 2 is configured with a click adapter plate 8; the click adapter plate 8 is used for communication with the stepper motor 3.

[0036] In a possible implementation, the stepper motor 3 is provided with a motor bearing assembly 9, and the motor bearing assembly 9 is used to bear the stepper motor 3. In the embodiment of the present application, the motor bearing assembly 9 is fixed to the bottom plate 1 by screws.

[0037] In the embodiment of the present application, the sensor test board 4 is threadedly connected to the stepper motor 3 .

[0038] In a possible implementation, the sensor placement slot 7 is implemented as a rectangular slot. Optionally, the number of the sensor placement slots 7 is 10, wherein 5 sensor placement slots 7 are located on one side of the sensor positioning fixture 5, and 5 sensor placement slots 7 are located on the other side of the sensor positioning fixture 5. That is, the sensor positioning fixture 5 can accommodate 10 proximity sensors to be tested at the same time.

[0039] In a possible implementation, the displacement sensor 6 is implemented as a contact displacement sensor 6. A test end of the displacement sensor 6 is in contact with the sensor test board 4.

[0040] In a possible implementation, the displacement sensor 6 is provided with a limit block 10 to limit the movement of the displacement sensor 6. Correspondingly, the side of the sensor positioning fixture 5 has a locking plate 11; the sensor positioning fixture 5 is fixedly connected to the base plate 1 through the locking plate 11. There are two locking plates 11, which are respectively located on both sides of the sensor positioning fixture 5. In this case, the sensor positioning fixture 5 is also provided with a cushion seat 12. In the embodiment of the present application, the limit block 10 and the locking plate 11 are fixed by screw connection.

[0041] In the embodiment of the present application, the displacement sensor 6 is further configured with a baffle 14 and a sensor bracket 15 for limiting the position.

[0042] In a possible implementation, the proximity sensor testing device further includes a communication adapter board 13 ; when the proximity sensor to be tested is in a testing state, the proximity sensor to be tested is in communication connection with the communication adapter board 13 .

[0043] In one example, the communication adapter board 13 is implemented as a DUT adapter board.

[0044] For an example, see Figure 2 The bottom of the base plate 1 also includes a foot 16 for maintaining the base plate 1 in a horizontal state during the test process.

[0045] To sum up, the device provided in the embodiment of the present application, during the process of the device testing the proximity sensor, sets a displacement sensor for reference. During the process of the stepper motor driving the sensor test board to move, the data measured by the displacement sensor is used as a reference to determine whether the data measured by the proximity sensor is accurate, thereby obtaining accurate proximity sensor test results. While ensuring the test accuracy, the test process is simplified and the test cycle is shortened.

[0046] The above are only optional embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A proximity sensor testing device, characterized in that: The device comprises a base plate (1), a motor bracket (2), a stepping motor (3), a sensor test plate (4), a sensor positioning fixture (5) and a displacement sensor (6); The motor bracket (2), the stepper motor (3), the sensor test board (4), the sensor positioning fixture (5) and the displacement sensor (6) are located above the base plate (1); The stepper motor (3) is fixedly connected to the base plate (1) via the motor bracket (2); The power output end of the stepper motor (3) is connected to the sensor test board (4), and the stepper motor (3) is used to drive the sensor test board (4) to move; The sensor positioning fixture (5) is opposite to the sensor test board (4), and the sensor positioning fixture (5) comprises at least two sensor placement slots (7), wherein the sensor placement slots (7) are used to place the proximity sensor to be tested; The displacement sensor (6) is used to determine the displacement of the sensor test plate (4) when the sensor test plate (4) moves.

2. The proximity sensor testing device according to claim 1, characterized in that: The motor bracket (2) is implemented as an L-shaped bracket, and the motor bracket (2) is provided with a motor adapter plate (8); The motor adapter plate (8) is used for communication with the stepper motor (3).

3. The proximity sensor testing device according to claim 1, characterized in that: The stepper motor (3) is provided with a motor bearing assembly (9); The motor bearing assembly (9) is used to bear the stepping motor (3).

4. The proximity sensor testing device according to claim 1, characterized in that: The sensor placement groove (7) is implemented as a rectangular groove.

5. The proximity sensor testing device according to claim 1, characterized in that: The displacement sensor (6) is implemented as a contact displacement sensor; The test end of the displacement sensor is in contact with the sensor test plate.

6. The proximity sensor testing device according to claim 5, characterized in that: The displacement sensor (6) is equipped with a limit block (10).

7. The proximity sensor testing device according to claim 5, characterized in that: The side surface of the sensor positioning fixture (5) is provided with a locking plate (11); The sensor positioning fixture (5) is fixedly connected to the base plate (1) via the locking plate (11).

8. The proximity sensor testing device according to claim 7, characterized in that: The sensor positioning fixture (5) is also provided with a cushion seat (12).

9. The proximity sensor testing device according to claim 1, characterized in that: The proximity sensor testing device also includes a communication adapter board (13); When the proximity sensor to be tested is in a testing state, the proximity sensor to be tested is communicatively connected to the communication adapter board (13).

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