CN215340184U

CN215340184U - Circuit board function testing device

Info

Publication number: CN215340184U
Application number: CN202121048265.0U
Authority: CN
Inventors: 张彬; 陈曙光; 王聪; 王超; 刘聪; 魏文娟
Original assignee: Autobio Labtec Instruments Zhengzhou Co Ltd
Current assignee: Autobio Experimental Instrument Zhengzhou Co Ltd; Autobio Labtec Instruments Zhengzhou Co Ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-12-28
Anticipated expiration: 2031-05-17

Abstract

The utility model discloses a circuit board function testing device which comprises a testing function board, wherein the testing function board consists of an MCU module, a power supply module, a keyboard module, an OLED module, an A/D module, a flash module, a CAN communication module and a signal generating module; the keyboard module is connected with the IO interface of the MCU module and used for setting parameters and starting test; the OLED module is connected with the SPI interface of the MCU module and is used for displaying set parameters, acquired voltage values and test results; the A/D module samples an external voltage value through an ADC1 channel of the MCU module and converts the analog voltage into a digital signal; the flash module stores the set parameters by using a flash unit in the MCU module, so that the power failure data loss is avoided; the CAN communication module is connected with a CAN interface of the MCU module and is used for communicating with the tested circuit board; and the signal generation module is used for simulating and generating the orthogonal signal output by the encoder. The utility model has good man-machine interaction interface, high efficiency of testing the function of the detected circuit board and achieves the purpose of one-key testing.

Description

Circuit board function testing device

Technical Field

The utility model relates to a circuit testing device, in particular to a circuit board function testing device.

Background

In the middle stage and the tail end of the circuit board manufacturing, a special test fixture is needed to comprehensively test the circuit board functional module so as to confirm the quality of the circuit board. The traditional test method is that a circuit board is placed on a test fixture, a sensor is connected, and then different commands are sent to the circuit board through upper computer software of a computer and the fed-back commands are checked to judge whether the circuit board functions normally or not. The existing test fixture CAN only test the voltage signal of the circuit board, and if the function of the circuit board is tested, a computer, a two-way USB-CAN device, a stepping motor control board, a stepping motor, a circuit board test fixture, an origin sensor and the like are required to be connected. One path of USB-CAN connected with a computer sends control commands such as inquiry parameters, setting parameters and enabling the pulse counting function of the encoder, the other path of USB-CAN sends commands to the stepping motor control board to control the motor to rotate and output encoder signals, and then the pulse counting value of the circuit board to be detected is read. Testing a circuit board requires repeating the same steps up to 18 times. The test process is complicated, the auxiliary equipment is more, and the efficiency is low; meanwhile, short circuit is easily caused during hardware connection, and the requirement on the technical level of testers is high.

Disclosure of Invention

The utility model aims to provide a circuit board function testing device which improves testing efficiency and reduces the operation intensity of testing personnel.

In order to achieve the purpose, the utility model can adopt the following technical scheme:

the circuit board function testing device comprises a testing function board, wherein the testing function board consists of an MCU module, a power supply module, a keyboard module, an OLED module, an A/D module, a flash module, a CAN communication module and a signal generating module; the keyboard module is connected with the IO interface of the MCU module and is used for setting parameters and starting test; the OLED module is connected with the SPI interface of the MCU module and is used for displaying set parameters, acquired voltage values and test results; the A/D module samples an external voltage value through an ADC1 channel of the MCU module and converts an analog voltage into a digital signal; the flash module utilizes the flash unit in the MCU module to store the set parameters, thereby avoiding the loss of power failure data; the CAN communication module is connected with a CAN interface of the MCU module and is used for communicating with the tested circuit board; and the signal generation module is used for simulating and generating the orthogonal signal output by the encoder.

The utility model has good man-machine interaction interface, high efficiency of testing the function of the detected circuit board, and can simulate and generate the signal of the external sensor and automatically send the command to the detected circuit board and analyze the feedback data according to the communication command of the circuit board and the characteristic of the external sensor, thereby achieving the purpose of one-key test.

Drawings

Fig. 1 is a schematic block diagram of the circuit of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the circuit board function testing device of the present invention comprises a testing function board, wherein the testing function board is composed of an MCU module, a power module, a keyboard module, an OLED module, an a/D module, a flash module, a CAN communication module, and a signal generating module; the keyboard module is connected with the IO interface of the MCU module and is used for setting parameters and starting test; the OLED module is connected with the SPI interface of the MCU module and is used for displaying set parameters, acquired voltage values and test results; the A/D module samples an external voltage value through an ADC1 channel of the MCU module and converts an analog voltage into a digital signal; the flash module utilizes the flash unit in the MCU module to store the set parameters, thereby avoiding the loss of power failure data; the CAN communication module is connected with a CAN interface of the MCU module and is used for communicating with the tested circuit board; and the signal generation module is used for generating orthogonal signals based on the timer and the interrupt.

The test method of the utility model is briefly described as follows:

when the computer is started, the MCU module starts to work, the voltage signal and the currently set parameters are displayed, and the parameters can be modified through the keyboard module. When the MCU module detects that a test key is started, the MCU module sends a parameter query command through the CAN communication module, queries whether parameters stored in the tested circuit board are correct or not, sends a parameter modification command if the parameters are incorrect, then sends a command to skip, and runs a user preset program. The test function board sends an enabling 18-channel encoder pulse counting function command to the tested circuit board again, if the returned command is not received to prompt connection errors, the returned command is correct, an orthogonal signal is generated according to the set parameters, and the tested circuit board starts to count the generated orthogonal signal. And finally, the MCU module sends a command to read and analyze the 18-path counting value of the tested circuit board, and the 18-path counting value is displayed on the OLED module.

Claims

1. The utility model provides a circuit board function test device, includes test function board, its characterized in that: the test function board consists of an MCU module, a power supply module, a keyboard module, an OLED module, an A/D module, a flash module, a CAN communication module and a signal generation module; the keyboard module is connected with the IO interface of the MCU module and is used for setting parameters and starting test; the OLED module is connected with the SPI interface of the MCU module and is used for displaying set parameters, acquired voltage values and test results; the A/D module samples an external voltage value through an ADC1 channel of the MCU module and converts an analog voltage into a digital signal; the flash module utilizes the flash unit in the MCU module to store the set parameters, thereby avoiding the loss of power failure data; the CAN communication module is connected with a CAN interface of the MCU module and is used for communicating with the tested circuit board; and the signal generation module is used for simulating and generating the orthogonal signal output by the encoder.