嵌入式数字兆欧表的设计

摘要

列车的绝缘值是列车安全运行的重要因素之一，是列车每次进出库都必须检测的项目。本文设计的嵌入式数字兆欧表是一种对列车各项绝缘参数进行检查的专用设备，以ARM为核心控制单元，具有自动保存数据功能，通过USB接口与计算机通讯实现数据传输，便于绝缘电阻测量数据的信息管理。嵌入式数字兆欧表具有测量精度高、性能稳定、操作简单、显示直观、实用性强、携带方便等特点，符合计算机技术的发展趋势。%The insulation resistance of train electric line is one of the significant factors for the train safety running and must be detected in or out the carbarn. The embedded digital megohm-meter is a special equipment to detect the insulation resistance of train electric line. The system, by using ARM as the core control unit, has auto-matic data storage function, and transmits the data to PC through the USB line, which is convenient to mange mea-sured results. The portable embedded digital megohm-meter has several advantages, such as high accuracy, stable capability, simple operation, intuitionistic display, and strong practicability, etc. , which conforms to the trend of computer technology.