A characteristic resistance automatic testing device

Abstract

The utility model provides a kind of characteristic resistance automatic testing device, belong to characteristic resistance test technical field.The utility model characteristic resistance automatic testing device includes industrial computer, DC low resistance tester, multiplex relay test module, power supply and wiring terminal, power supply connects multiplex relay test module, multiplex relay test module connects industrial computer and DC low resistance tester, wiring terminal connects multiplex relay test module.Compared with prior art, the utility model effectively solves the problem that the existing technology needs to design control module, relay module, driving module and multimeter separately, which can cause large occupied area.

Description

Technical Field

[0001] This utility model belongs to the field of characteristic resistance testing technology, specifically relating to an automatic characteristic resistance testing device. Background Technology

[0002] Hall effect sensors are widely used in brushless DC motors. In a brushless DC motor, a Hall effect sensor assembly acts as a position sensor, transmitting the rotor's position signal to the motor controller. The controller then uses this position information to control the opening and closing of the corresponding windings, thus ensuring the smooth operation of the brushless DC motor. If the Hall effect sensor in the assembly is damaged, the controller cannot obtain the correct position signal and therefore cannot correctly control the opening and closing of the corresponding windings, causing the motor to malfunction.

[0003] Because Hall sensors are fragile components, their performance needs to be tested at multiple stages of production. Currently, the common practice for testing Hall sensors and their assemblies is to use a multimeter's resistance setting. However, this method has several drawbacks. First, the entire testing process requires manual recording by inspectors, and second, it is cumbersome. When testing large quantities of Hall sensors and assemblies, it becomes a significant challenge for inspectors. Not only is the testing efficiency low, but manual testing can easily lead to reversing the positive and negative terminals of the Hall sensor with the multimeter's probes, potentially damaging the internal components of the Hall sensor.

[0004] The resistance of motor windings typically ranges from tens of milliohms to tens of ohms. Whether the resistance of the motor windings is correct and whether the resistance between each pair of phases is balanced are important indicators for judging the quality of the motor. Currently, the commonly used testing method is to use a DC low-resistance tester to check the resistance of the motor windings. However, this process is cumbersome, as the resistance of the motor windings needs to be checked at multiple stages of production.

[0005] The patent document with authorization announcement number CN 209231421 U discloses an automatic testing and discrimination system for characteristic resistance values. Although this automatic testing and discrimination system can accurately measure the characteristic resistance value data of products and accurately detect products with problems, it significantly improves the efficiency of product characteristic resistance value testing and saves labor costs. The system software can be appropriately modified according to the needs of the model and can be promoted and applied to new models of products in a short time. However, this automatic testing and discrimination system requires the separate design of control modules, relay modules, drive modules and multimeters, which leads to the problem of large area occupation. Utility Model Content

[0006] The purpose of this invention is to provide an automatic characteristic resistance testing device to solve the problem that existing technologies require separate design of control modules, relay modules, drive modules and multimeters, which results in a large footprint.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] In a first aspect, this utility model provides an automatic characteristic resistance testing device, including an industrial control computer, a DC low resistance tester, a multi-channel relay test module, a power supply, and wiring terminals;

[0009] The power supply is connected to the multi-channel relay test module, and the multi-channel relay test module is connected to the industrial computer and the DC low resistance tester.

[0010] The terminal block is connected to a multi-channel relay test module.

[0011] A further improvement of this utility model is that the industrial control computer is a host computer.

[0012] A further improvement of this utility model is that the multi-channel relay test module includes a control unit, a drive unit, a relay unit, and a characteristic resistance value test unit;

[0013] The control unit is connected to the drive unit, the drive unit is connected to the relay unit, and the relay unit is connected to the characteristic resistance test unit.

[0014] A further improvement of this invention is that the power supply is a DC power supply.

[0015] A further improvement of this invention is that the DC power supply is a 12V / 3A DC power supply.

[0016] A further improvement of this invention is that the multi-channel relay test module is connected to the industrial control computer via a second communication line, and the multi-channel relay test module is connected to the DC low resistance tester via a connecting cable.

[0017] A further improvement of this invention is that the second communication line is a copper-plated tin communication line.

[0018] A further improvement of this utility model is that the communication interface between the multi-channel relay test module and the industrial control computer is an isolated RS485 communication interface.

[0019] A further improvement of this utility model is that the wiring terminal is a 3-way wiring terminal, a 4-way wiring terminal, or a 5-way wiring terminal.

[0020] A further improvement of this utility model is that the wiring terminal is a pluggable wiring terminal.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Compared with existing automatic characteristic resistance testing devices, the automatic characteristic resistance testing device proposed in this invention is designed with an industrial control computer, a DC low resistance tester, a multi-channel relay test module, a power supply, and terminal blocks. The power supply is connected to the multi-channel relay test module, which is connected to the industrial control computer and the DC low resistance tester. The terminal blocks are connected to the multi-channel relay test module. It is evident that this invention does not design separate processing units (control module, relay module, drive module, and multimeter), but instead integrates these separate processing units into a single multi-channel relay test module. This design not only simplifies the overall structure of the automatic characteristic resistance testing device but also significantly reduces its size (occupied area), effectively solving the problem of large space requirements associated with separate control modules, relay modules, drive modules, and multimeters in existing technologies.

[0023] Furthermore, this utility model discloses a multi-channel relay test module connected to the industrial control computer via a second communication line, and the multi-channel relay test module connected to a DC low resistance tester via a connecting cable. The communication line not only has a high transmission rate but also offers flexible deployment.

[0024] Furthermore, this utility model discloses that the communication interface used between the multi-channel relay test module and the industrial control computer is an isolated RS485 communication interface, which not only has a long transmission distance and high data transmission rate, but also strong anti-interference ability and high reliability.

[0025] Furthermore, this utility model discloses that the wiring terminal is a pluggable wiring terminal, which is not only quick and convenient to connect, but also convenient for maintenance personnel to perform maintenance. Attached Figure Description

[0026] Figure 1 This is a top view of the automatic characteristic resistance testing device of this utility model.

[0027] Figure 2 This is a wiring diagram of the multi-channel relay test module connected to the 3-channel terminal block in Embodiment 2 of this utility model;

[0028] In the diagram: 1. Industrial computer; 2. DC low resistance tester; 3. First communication line; 4. Second communication line; 5. Multi-channel relay test module; 6. Power supply; 7. Wiring terminal; 8. Connecting cable. Detailed Implementation

[0029] To further understand the present invention, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are merely illustrative and not intended to limit the scope of the invention.

[0030] The automatic characteristic resistance testing device proposed in this utility model includes an industrial control computer, a DC low resistance tester, a multi-channel relay test module, a power supply, and terminal blocks. The power supply is connected to the multi-channel relay test module, which is connected to the industrial control computer and the DC low resistance tester. The terminal blocks are connected to the multi-channel relay test module. Compared with the prior art, this utility model effectively solves the problem that the prior art requires separate design of control modules, relay modules, drive modules, and multimeters, resulting in a large footprint.

[0031] Example 1:

[0032] This embodiment discloses an automatic characteristic resistance testing device. A top view schematic diagram of the automatic characteristic resistance testing device of this utility model is shown below. Figure 1 As shown, the technical solution of this utility model is specifically described as follows:

[0033] The automatic characteristic resistance testing device of this embodiment (specifically taking the automatic characteristic resistance testing device of Hall sensor and Hall sensor component as an example) includes an industrial control computer 1, a DC low resistance tester 2, a multi-channel relay test module 5, a power supply 6, and a wiring terminal 7.

[0034] Power supply 6 (in this embodiment, power supply 6 is a DC power supply, specifically a 12V / 3A DC power supply) is connected to the multi-channel relay test module 5. The multi-channel relay test module 5 is connected to the industrial computer 1 and the DC low-resistance tester 2. (In this embodiment, the multi-channel relay test module 5 is connected to the industrial computer 1 via a second communication line 4. The second communication line 4 is a copper-plated tin communication line with a double shielding layer and an insulation layer. This communication line offers high transmission speed and flexible deployment. The industrial computer 1 is the host computer, and the multi-channel relay test module 5 is connected to the DC low-resistance tester 2 via a connecting cable 8.) The industrial computer 1 is connected to the DC low-resistance tester 2 via a first communication line 3 (made of the same material as the second communication line 4).

[0035] Terminal 7 (in this embodiment, terminal 7 is a 4-way terminal and is a pluggable terminal. Pluggable terminals are not only quick and easy to connect, but also convenient for maintenance personnel to perform maintenance) connects to the multi-channel relay test module 5.

[0036] The multi-channel relay test module 5 includes a control unit, a drive unit, a relay unit, and a characteristic resistance test unit. The control unit is connected to the drive unit, the drive unit is connected to the relay unit, and the relay unit is connected to the characteristic resistance test unit.

[0037] In this embodiment, the communication interface used between the multi-channel relay test module 5 and the industrial control computer 1 is an isolated RS485 communication interface. The isolated RS485 communication interface not only has a long transmission distance and high data transmission rate, but also has strong anti-interference ability and high reliability.

[0038] In this embodiment, one end of the second communication line 4 and the first communication line 3 is a USB interface for connecting to a computer. The other end of the second communication line 4 and the first communication line 3 is a DB9 connector, which connects to an adapter for connecting to the RS485 communication interface of the multi-channel relay test module 5.

[0039] In this embodiment, the connecting cable 8 is the test cable that comes with the DC low resistance tester 2, similar to the test leads of a multimeter. All other connecting wires for each component in this embodiment are ordinary copper core wires.

[0040] In this embodiment, the DC low resistance tester 2 is model TH2516B, with a measurement range of 1μΩ to 20kΩ, and the multi-channel relay test module 5 has a measurement range of 0.1Ω to 200MΩ.

[0041] Example 2:

[0042] This embodiment discloses an automatic characteristic resistance testing device. A top view schematic diagram of the automatic characteristic resistance testing device of this utility model is shown below. Figure 1 As shown, the technical solution of this utility model is specifically described as follows:

[0043] The automatic characteristic resistance testing device of this embodiment (specifically taking the automatic characteristic resistance testing device of Hall sensor and Hall sensor component as an example) includes an industrial control computer 1, a DC low resistance tester 2, a multi-channel relay test module 5, a power supply 6, and a wiring terminal 7.

[0044] Power supply 6 (in this embodiment, power supply 6 is a DC power supply, specifically a 12V / 3A DC power supply) is connected to multi-channel relay test module 5. Multi-channel relay test module 5 is connected to industrial computer 1 and DC low resistance tester 2. (In this embodiment, multi-channel relay test module 3 is connected to industrial computer 1 via a second communication line 4. The second communication line 4 is a copper-plated tin communication line with a double shielding layer and an insulation layer. This communication line not only has a high transmission rate but also offers flexible deployment. Industrial computer 1 is the host computer, and multi-channel relay test module 5 is connected to DC low resistance tester 2 via connecting cable 8.) Industrial computer 1 is connected to DC low resistance tester 2 via first communication line 3 (made of the same material as second communication line 4).

[0045] Terminal 7 (in this embodiment, terminal 7 is a 3-way terminal and is a pluggable terminal. Pluggable terminals are not only quick and easy to connect, but also convenient for maintenance personnel to perform maintenance) connects to the multi-channel relay test module 5.

[0046] The multi-channel relay test module 5 includes a control unit, a drive unit, a relay unit, and a characteristic resistance test unit. The control unit is connected to the drive unit, the drive unit is connected to the relay unit, and the relay unit is connected to the characteristic resistance test unit.

[0047] In this embodiment, the multi-channel relay test module 5 uses a 48-channel relay module. To achieve matrix testing, the 48 relay modules are grouped in pairs, resulting in 24 groups. This embodiment requires 15 groups, with the remaining relay modules serving as backups. When a relay module fails, no modifications to the program or test circuit are needed; the backup relay module is directly selected to continue testing. The testing device will mark the failed relay module and set the newly selected relay module as the default setting. This not only improves the reliability of the testing device but also increases testing efficiency.

[0048] The wiring diagram for connecting the three terminal blocks to the multi-channel relay test module 5 in this embodiment is shown below. Figure 2 As shown, Figure 2 VCC, HU, and GND indicate the pins connected to the Hall sensor via three terminal blocks. K1 to K6 represent relay units. The positive terminal for resistance measurement represents the high potential terminal of the resistance measurement module (characteristic resistance test unit in multi-channel relay test module 5), and the negative terminal for resistance measurement represents the low potential terminal of the resistance measurement module (characteristic resistance test unit in multi-channel relay test module 5).

[0049] In this embodiment, the communication interface used between the multi-channel relay test module 5 and the industrial control computer 1 is an isolated RS485 communication interface. The isolated RS485 communication interface not only has a long transmission distance and high data transmission rate, but also has strong anti-interference ability and high reliability.

[0050] Example 3:

[0051] This embodiment discloses an automatic characteristic resistance testing device. A top view schematic diagram of the automatic characteristic resistance testing device of this utility model is shown below. Figure 1 As shown, the technical solution of this utility model is specifically described as follows:

[0052] The automatic characteristic resistance testing device of this embodiment (specifically taking the automatic characteristic resistance testing device of Hall sensor and Hall sensor component as an example) includes an industrial control computer 1, a DC low resistance tester 2, a multi-channel relay test module 5, a power supply 6, and a wiring terminal 7.

[0053] Power supply 6 (in this embodiment, power supply 6 is a DC power supply, specifically a 12V / 3A DC power supply) is connected to multi-channel relay test module 5. Multi-channel relay test module 5 is connected to industrial computer 1 and DC low resistance tester 2. (In this embodiment, multi-channel relay test module 3 is connected to industrial computer 1 via a second communication line 4. The second communication line 4 is a copper-plated tin communication line with a double shielding layer and an insulation layer. The communication line not only has a high transmission rate but also offers flexible deployment. Industrial computer 1 is the host computer, and multi-channel relay test module 5 is connected to DC low resistance tester 2 via connecting cable 8.) Industrial computer 1 is connected to DC low resistance tester 2 via first communication line 3 (made of the same material as second communication line 4).

[0054] Terminal 7 (in this embodiment, terminal 7 is a 5-way terminal and is a pluggable terminal. Pluggable terminals are not only quick and easy to connect, but also convenient for maintenance personnel to perform maintenance) connects to the multi-channel relay test module 3.

[0055] The multi-channel relay test module 5 includes a control unit, a drive unit, a relay unit, and a characteristic resistance test unit. The control unit is connected to the drive unit, the drive unit is connected to the relay unit, and the relay unit is connected to the characteristic resistance test unit.

[0056] In this embodiment, the communication interface used between the multi-channel relay test module 5 and the industrial control computer 1 is an isolated RS485 communication interface. The isolated RS485 communication interface not only has a long transmission distance and high data transmission rate, but also has strong anti-interference ability and high reliability.

[0057] For other details, please refer to Example 1.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. An automatic resistance testing device, characterized in that, It includes an industrial computer (1), a DC low resistance tester (2), a multi-channel relay test module (5), a power supply (6), and wiring terminals (7). The power supply (6) is connected to the multi-channel relay test module (5), and the multi-channel relay test module (5) is connected to the industrial computer (1) and the DC low resistance tester (2). The terminal block (7) is connected to the multi-channel relay test module (5).

2. The automatic characteristic resistance testing device according to claim 1, characterized in that, The industrial control computer (1) is the host computer.

3. The automatic characteristic resistance testing device according to claim 1, characterized in that, The multi-channel relay test module (5) includes a control unit, a drive unit, a relay unit, and a characteristic resistance test unit; The control unit is connected to the drive unit, the drive unit is connected to the relay unit, and the relay unit is connected to the characteristic resistance test unit.

4. The automatic characteristic resistance testing device according to claim 1, characterized in that, The power supply (6) is a DC power supply.

5. The automatic characteristic resistance testing device according to claim 4, characterized in that, The DC power supply is a 12V / 3A DC power supply.

6. The automatic characteristic resistance testing device according to claim 1, characterized in that, The multi-channel relay test module (5) is connected to the industrial control computer (1) via the second communication line (4), and the multi-channel relay test module (5) is connected to the DC low resistance tester (2) via the connecting cable (8).

7. The automatic characteristic resistance testing device according to claim 6, characterized in that, The second communication line (4) is a copper-plated tin communication line.

8. The automatic characteristic resistance testing device according to claim 6, characterized in that, The communication interface used between the multi-channel relay test module (5) and the industrial control computer (1) is an isolated RS485 communication interface.

9. The automatic characteristic resistance testing device according to claim 1, characterized in that, The terminal block (7) is a 3-way terminal block, a 4-way terminal block, or a 5-way terminal block.

10. The automatic characteristic resistance testing device according to claim 1, characterized in that, The terminal block (7) is a pluggable terminal block.

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