Modular resistor voltage measuring device and method

Abstract

The invention discloses a modular resistor voltage measuring device. The device comprises a testing frame, a plurality of resistance voltage acquisition modules, a main control bottom plate and a multi-serial port management circuit; the testing frame is provided with a detachable tray used for fixing a PCBA board to be tested and a plurality of sets of ejector pins arranged on the tray; each set of ejector pins are in one-to-one correspondence with test points on the PCBA board to be tested; the resistance voltage acquisition modules are used for acquiring voltage and / or resistance values of test points corresponding to one set of ejector pins, and sending the voltage and / or resistance values to the main control bottom plate through a serial port; the main control bottom plate is connected with the resistance voltage acquisition modules and the multi-serial port management circuit; and the multi-serial-port management circuit obtains testing data of resistance and / or voltage from serial ports of the plurality of resistance and voltage acquisition modules in a polling mode. The measurement time can be obviously shortened, and the measurement efficiency can be improved. The invention further discloses a modular resistor voltage measuring method.

Description

technical field [0001] The invention belongs to the field of PCB detection, and more specifically relates to a modular resistance voltage measurement device and method. Background technique [0002] At present, the production line usually uses manual testing and ICT testing to test the resistance and voltage of PCBA test points. [0003] Manual testing method: When the PCBA is not powered on, use a multimeter to test the impedance of each test point one by one. After the impedance test of all test points passes, then connect the device to the power supply, adjust the gear of the multimeter, and test the voltage of each test point one by one. . Each test point requires the operator to click with the multimeter pen to view and record the test results. During the process, the multimeter gear must be switched according to the test point specifications, which is error-prone and inefficient. The advantage is that with operational training, theoretically manual methods can test a...

AI Technical Summary

Problems solved by technology

[0009] Limitation 1: A large number of ADC circuits will be designed in ICT, usually ranging from dozens to thousands; the cost is very high

[0010] Limitation 2: The needle bed needs to be replaced when ICT tests different products, and the structure of the needle bed is complex and expensive

[0011] Limitation 3: When ICT tests different products, each product requires a set of independent programming algorithms, which has a high threshold for programming technology and high labor costs

[0012] Limitation 4: ICT usually does not measure the voltage value of the on-board power supply

[0014] When the detection circuit is switched through the relay, there will be fluctuations in the voltage measurement, and it will be hundreds of milliseconds if it is broken, and it will be as long as 2 seconds. If there are many test points on the entire PCBA board, the test time of the single board will be longer

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