HAN Qiwen, ZHAO Zhuanping, LIANG Shuang

(College of Mechanical and Electrical Engineering, Nanjing University ofAeronautics and Astronautics,Nanjin 210016, China)

 

 

Abstract: In order to improve the traditional testing means of missile cables which is low efficiency, poor reliability etc., on the basis of summarizing the current domestic and overseas development status of cable testing , the principle of cable disconnection, conduction, insulation and other detections, bus cascade, communication and integration of the hardware, cable switching, the design of database and report ,etc. ,were studied and a general automatic cable detection system was developed based on industrial PC, NX harness detector, high resistance detection module under low voltage , cable adapter board and C# and SQL Server2008 as software development tools. The NX detector was used to complete the normal conduction ,insulation test and the special test module which depends on relay switch matrix (used to switch from measuring points) and digital multimeter with serialport for data acquisition was designed to accomplish high resistance detecting under low voltage ,multiple hardwares communicate between each other through serial ports and USB . By analysising the cable connection, a cable adapter board was designed to achieve the standardization and modularization of the test terminal .The software module was divided according to the hardware structure and system function ,database tables and customer reports were designed to achieve the preservation, query and print of the detection results. Experimental results show that the system can detect with high resolution, accuracy and reliability, good stability, fast detection speed and meets the requirements.

Key words: cable net detection; NX harness detector; measurement point switching; cable adapter board