Water injection pump wire harness testing device

Abstract

The utility model discloses a water injection pump wire harness testing device, which comprises a Hall chip U1, the Hall chip U1 comprises a VDD pin, an OUTPUT pin and a GND pin, the VDD pin is electrically connected with an external VDD, the VDD pin is connected in series with a capacitor C and then is grounded, the VDD pin is connected in series with a resistor R and then is electrically connected with the OUTPUT pin, the OUTPUT pin is externally connected with an MOS tube, and the GND pin is grounded. Based on the Hall principle, the LED lamp is controlled to be turned on and off through the output high-low signals, the performance of the water injection pump wire harness is visually and conveniently obtained, the test is stable and reliable, the structure is simple, and the device cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to a water injection pump wiring harness testing device. Background Art

[0002] In order to meet the testing needs of large quantities of water injection pump wiring harnesses, it is necessary to effectively improve the testing efficiency. However, the testing process and connection principle of the existing testing device are complicated, the testing time is long, the testing efficiency is low, and it cannot meet the testing tasks of large quantities. Utility Model Content

[0003] In order to overcome the above technical problems, the utility model discloses a water injection pump wiring harness testing device.

[0004] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0005] A water injection pump wiring harness testing device, the device includes a Hall chip U1, the Hall chip U1 includes a VDD pin, an OUTPUT pin and a GND pin, the VDD pin is electrically connected to an external VDD, the VDD pin is connected in series with a capacitor C and then grounded, the VDD pin is connected in series with a resistor R and then electrically connected to the OUTPUT pin, the OUTPUT pin is externally connected to a MOS tube, and the GND pin is grounded.

[0006] In the above-mentioned water injection pump wiring harness testing device, an LED lamp and a diode are electrically connected in sequence between the external VDD and the VDD pin.

[0007] In the above-mentioned water injection pump wiring harness testing device, the voltage of the external VDD is 5V.

[0008] In the above-mentioned water injection pump wiring harness testing device, the resistance of the resistor R is 47 kΩ.

[0009] In the above-mentioned water injection pump wiring harness testing device, the capacity of the capacitor C is 0.01-1 μF.

[0010] The above-mentioned water injection pump wiring harness testing device, wherein the device also includes an electrically connected access board and a function board, an MCU is arranged on the function board, and the MCU is electrically connected to the Hall chip U1.

[0011] In the above-mentioned water injection pump wiring harness testing device, a magnet placement cavity is provided on the access board corresponding to the Hall chip U1, and a magnet is movably provided in the magnet placement cavity.

[0012] In the above-mentioned water injection pump wiring harness testing device, a power supply interface for connecting to an external VDD is also provided on the function board.

[0013] The above-mentioned water injection pump wiring harness testing device, wherein a product access interface is provided on the access board.

[0014] In the above-mentioned water injection pump wiring harness testing device, the access board and the function board are respectively provided with a first test interface and a second test interface, and the first test interface and the second test interface are electrically connected via a connecting line.

[0015] The beneficial effects of the utility model are as follows: the utility model is based on the Hall principle, and controls the on and off of the LED lamp by outputting high and low signals, so that the performance of the water injection pump wiring harness can be intuitively and conveniently known, the test is stable and reliable, the structure is simple, and the device cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a circuit diagram of the utility model;

[0018] Figure 2 It is a front view schematic diagram of the utility model. DETAILED DESCRIPTION

[0019] The present invention is further described below through specific embodiments to make the technical solution of the present invention easier to understand and grasp, rather than to limit the present invention.

[0020] Example: See Figure 1 to Figure 2 , this embodiment provides a water injection pump wiring harness testing device, the device includes a Hall chip U1, the Hall chip U1 includes a VDD pin, an OUTPUT pin and a GND pin, the VDD pin is electrically connected to an external VDD, the VDD pin is connected in series with a capacitor C and then grounded, the VDD pin is connected in series with a resistor R and then electrically connected to the OUTPUT pin, the OUTPUT pin is externally connected to a MOS tube, and the GND pin is grounded.

[0021] Preferably, an LED lamp and a diode are electrically connected in sequence between the external VDD and the VDD pin.

[0022] Preferably, the voltage of the external VDD is 5V, the resistance of the resistor R is 47kΩ, and the capacity of the capacitor C is 0.01-1μF.

[0023] Preferably, the device further comprises an access board and a function board which are electrically connected, and an MCU is arranged on the function board, and the MCU is electrically connected to the Hall chip U1.

[0024] Furthermore, a magnet placement cavity is provided on the access board corresponding to the Hall chip U1, and a magnet is movably provided in the magnet placement cavity.

[0025] Preferably, the function board is also provided with a power supply interface for connecting to an external VDD, and the access board is provided with a product access interface, and the product access interface is used to access a wiring harness of a water injection pump to be tested.

[0026] Specifically, the access board and the function board are respectively provided with a first test interface and a second test interface, and the first test interface and the second test interface are electrically connected via a connecting line.

[0027] When the utility model is working, it includes the following steps:

[0028] (1) Connect the wiring harness of the water injection pump to be tested to the product access interface to connect the circuit;

[0029] (2) The external VDD outputs a constant current, and the magnet is placed in the magnet placement cavity. The magnet applies a uniform magnetic field. When the magnetic field acts on the Hall chip U1, a Hall voltage is output, and at this time, the OUTPUT pin outputs 0;

[0030] When the magnet is removed, the Hall chip U1 is not affected by the magnetic field, and the OUTPUT pin outputs 5V.

[0031] (3) The high and low signals outputted by the OUTPUT pin are used to control the MOS switch, thereby controlling the on and off of the LED light. When the LED light is off, it indicates that the water injection pump wiring harness is a good product, otherwise it is a defective product.

[0032] The utility model is reasonably and cleverly designed. Based on the Hall principle, the LED lamp is controlled on and off by outputting high and low signals, so the performance of the water injection pump wiring harness can be intuitively and conveniently known. The test is stable and reliable, the structure is simple, and the device cost is reduced.

[0033] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the technical means and technical contents disclosed above, without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the utility model without departing from the content of the technical solution of the utility model should be covered by the protection scope of the utility model.

Claims

1. A water injection pump wiring harness testing device, characterized in that: The device includes a Hall chip U1, which includes a VDD pin, an OUTPUT pin and a GND pin. The VDD pin is electrically connected to an external VDD, the VDD pin is connected in series with a capacitor C and then grounded, the VDD pin is connected in series with a resistor R and then electrically connected to the OUTPUT pin, the OUTPUT pin is externally connected to a MOS tube, and the GND pin is grounded.

2. The water injection pump wiring harness testing device according to claim 1, characterized in that: An LED lamp and a diode are electrically connected in sequence between the external VDD and the VDD pin.

3. The water injection pump wiring harness testing device according to claim 2, characterized in that: The voltage of the external VDD is 5V.

4. The water injection pump wiring harness testing device according to claim 3, characterized in that: The resistance of the resistor R is 47 kΩ.

5. The water injection pump wiring harness testing device according to claim 4, characterized in that: The capacity of the capacitor C is 0.01-1 μF.

6. The water injection pump wiring harness testing device according to claim 5, characterized in that: The device further comprises an access board and a function board which are electrically connected. An MCU is arranged on the function board, and the MCU is electrically connected to the Hall chip U1.

7. The water injection pump wiring harness testing device according to claim 6, characterized in that: A magnet placement cavity is provided on the access board corresponding to the Hall chip U1, and a magnet is movably provided in the magnet placement cavity.

8. The water injection pump wiring harness testing device according to claim 7, characterized in that: The function board is also provided with a power supply interface for connecting to an external VDD.

9. The water injection pump wiring harness testing device according to claim 8, characterized in that: A product access interface is provided on the access board.

10. The water injection pump wiring harness testing device according to claim 9, characterized in that: The access board and the function board are respectively provided with a first test interface and a second test interface, and the first test interface and the second test interface are electrically connected via a connecting line.

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