劉  曄， 鐔雄師， 陳  然， 錢夢驕， 劉亞光
（西安交通大學電氣工程學院，陜西 西安 710049）
摘  要：為解決傳統絕緣電阻與開關導通狀態測試儀在裝甲車車載電器設備檢測時效率低、精度差等問題，設計基于單片機、CPLD和觸摸屏的絕緣電阻與開關導通測試儀。系統具有準確迅速實現80路絕緣電阻巡回檢測與80路開關導通狀態判斷的功能，利用TOP242構成反激式開關電源產生200 V/50 V直流測試電壓，觸摸屏作為人機界面，CPLD完成譯碼工作以控制繼電器開關矩陣動作；加入低通濾波器的放大電路有效提高了系統的抗干擾性能。實驗結果表明：該測試儀完全滿足裝甲車車載設備絕緣電阻和開關導通測試的精度要求，提高了測試效率。
關鍵詞：絕緣電阻測試；開關導通測試；單片機；CPLD器件；開關電源
中圖分類號：TM934.31；TJ811+.92；TP274；TP216      文獻標志碼：A     文章編號：1674-5124（2013）04-0069-04
Design of insulation resistance and switch logic tester for armored
vehicle equipments
LIU Ye， TAN Xiong-shi， CHEN Ran， QIAN Meng-jiao， LIU Ya-guang
（School of Electrical Engineering，Xi’an Jiaotong University，Xi’an 710049，China）
Abstract: In order to improve the efficiency and precision of the traditional insulation resistance and switch logic tester for armored vehicle equipments， a new design of tester based on MCU， CPLD and HMI touch panel was proposed. It can successively monitor 80-circuit insulation resistance and judge the switch logic’s status. In this system， MCU-51 controller is used as the core， and 200 V/50V DC test power is produced by fly-back switch power with a TOP242 chip. TPC touch screen serves as the human-machine interface and CPLD is responsible for decoding work. Low-pass filter circuits can greatly improve the anti-jamming capability. The experimental results have manifested that the system meets actual engineering requirements and it has greatly enhanced the testing efficiency.
Key words: insulation resistance test； switch logic test； MCU； CPLD； switching power supply