模拟电子开关阵列的测试系统设计

Design of Testing System Based on Electronic Switch Matrix Circuit

市场上的线缆测试仪大多采用电磁继电器阵列,功能强大,价格昂贵。以PC/104嵌入式工控机和QNX嵌入式操作系统为核心,采用模拟电子开关式线缆端点选择阵列和基于可编程逻辑器件(CPLD)的线缆端点扫描控制电路,设计实现了一种小型、经济实用的线缆组件自动测试系统。最后对测试系统进行了试验验证,并对其主要性能参数进行了分析。

This paper introduces a small- scale, economical automatic cable testing system. The design chooses embedded industrial computer PC/104 as a platform,and selects QNX as operating system. The design adopts CPLD to design interface circuit. Useing the bidirectional conduction characteristic of electronic switch, the design achieves the goal of slecting endpoint. Finally, the main test parameters of system are analyzed.