| With the development of automation equipment, in some large equipment of special areas, the use of multi-core cable gradually increased. There are number of system failures are caused by the failure of cables. The performance of multi-core cable has become one of the most important factors that affect system's reliability. In debugging and maintenance of electrical equipment and electronic devices etc., test the on-state and insulation performance of the cable has become an indispensable part of detection tests. The traditional detection method is mainly manual. This method has a disadvantage of test slow, low accuracy, heavy workload, error that easily caused by human, and so on.View of the shortages of current cable detection, this paper studied how to improve the accuracy, speed and work efficiency of measurement, and reduce labor intensity. Then design a cable detection system that based on ATmega128 microcontroller, which integrates the on-off state measurement, insulation resistance measurement and on-resistance measurement in one. Operator could completely test the main performance of the cable by using a single cable detector. The test results will be showed on the LCD. Besides, the system could also communication with PC by serial ports, by which the test results could transport into the computer for follow-up analysis.This paper describes the design process of the system completely. Firstly, it introduces the detection principle, analyses and plans the system according to actual demand, and then fixes a scheme of hardware and software design. Secondly, the course of hardware circuit design, PCB layout, and hardware driver and application software design is introduced in detail. Finally, the problems encountered in debugging, the system debugging and amendments are descript briefly. The system has been designed and applied in the detection of cable in a special vehicle, running well and achieved the expected aim of the design. |
