Four-Wire Sensing Measurement Module of Printed Circuit Boards

• Main Authors: Hong Ting Lee, 李鴻廷
• Other Authors: M.F.Lu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/77k2zg

碩士 === 明新科技大學 === 電子工程系碩士班 === 106 === In this study, we implemented a Four-Wire Sensing Measurement System for testing of Printed Circuit Boards (PCBs) based on our former design. The basic requirement is designed with 1V~300V constant voltage and 100mA constant current output capability. Through the usage of ADC and FPGA to achieve numerical conversion and IO control. The goal is to develop a four-wire low-resistance measurement with accuracy of 1mΩ~100Ω and through this study to meet the market demand for PCB testing. This study assists the cooperation company to upgrade the company's old two-wire measurement system to a four-wire measurement system. Compared to the old system, the precision, accuracy and test speed are improved, and other test functions can be expanded in the future, such as: Spark test, 0.1mΩ test, circuit reduction and IO control pin reduction. This technology can be used in different industrial fields. Key words: Four-wire measurement, Printed Circuit Board, Spark test, low resistance measurement.