Short-circuit detection equipment and detection method of universal multi-channel printed circuit board assembly (PCBA)
A short-circuit detection and multi-channel technology, which is applied in the direction of electronic circuit testing, measuring electricity, measuring devices, etc., can solve the problems of expensive equipment, high implementation cost, poor short-circuit identification, etc., achieve high work efficiency, speed up test time, and prevent misjudgment low rate effect
Pending Publication Date: 2018-11-30
SUZHOU HENGJING ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology
Easy to follow diagnostics, but this method is poor for short circuit identification
Furthermore, the equipment is expensive and the implementation cost is high
Method used
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[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0040] Such as Figures 1 to 3 The general-purpose multi-channel PCBA short-circuit detection equipment includes a switch board 1, which is different in that: in order to perform short-circuit testing and judgment on the corresponding points on the PCBA, a number of I / O ports are distributed on the switch board 1. At the same time, in order to realize automatic detection, an MCU component 2 is connected to the switch board 1 , and the MCU component 2 sends a level signal to the switch board 1 . Moreover, in order to realize high-precision sampling, a sampling component 3 is also connected to the switch board 1 . Moreover, considering that the voltage signal may be distor...
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The invention relates to short-circuit detection equipment and detection method of a universal multi-channel printed circuit board assembly (PCBA). The short-circuit detection equipment comprises a switch panel, wherein a plurality of I / O interfaces are arranged in the switch panel, an MCU assembly is connected to the switch panel and is used for sending a level signal to the switch panel, a sampling assembly is further connected to the switch panel, an output end of the sampling assembly is connected with a voltage follower, the voltage follower is connected with the MCU assembly, and a resistance threshold contrast assembly and a digital-to-analogue conversion chip are connected to the MCU assembly. Automatic judgment can be achieved by an MCU assembly program, the mis-judgment rate is low, the short-circuit resistance can be tested at constant voltage, the detection angle is high, modes of global test and point-to-point test can be achieved, the test time is accelerated, a netlist mode can be employed during actual implementation, the working efficiency is high, and the test time is short.
Description
technical field [0001] The invention relates to a PCBA short-circuit detection device and a detection method thereof, in particular to a general-purpose multi-channel PCBA short-circuit detection device and a detection method thereof. Background technique [0002] The PCB empty board goes through the whole process of SMT upper part and DIP plug-in welding, referred to as PCBA. After the finished PCBA is soldered with SMT and DIP plug-ins, it cannot guarantee that the electronic components soldered on the PCBA are soldered correctly, such as lack of soldering, virtual soldering, short circuit, etc. In order to sort out bad PCBAs from good ones and repair them, and reduce the probability of rework and rework in subsequent processes, inspection is required. [0003] There are roughly two types of detection methods: [0004] 1. Manual testing, directly relying on vision and a multimeter to conduct short-circuit tests and judgments on the corresponding points on the PCBA, throu...
Claims
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IPC IPC(8): G01R31/02G01R31/28
CPCG01R31/2812G01R31/50
Inventor 张碧霞
Owner SUZHOU HENGJING ENVIRONMENTAL PROTECTION TECH CO LTD