一种提高RS422通信BIT可靠性的设计方法  

A Design Method to Improve the Reliability of RS422 Communication BIT

作　　者：周前柏 

机构地区：[1]中国航空计算技术研究所,西安710065

出　　处：《计算机测量与控制》2015年第11期3769-3772,共4页Computer Measurement &Control

摘　　要：为解决噪声干扰导致机载计算机RS422串行通信电路机内测试(BIT)虚警率较高的问题,对机载计算机RS422通信模块BIT虚警的故障特征进行了分析,提出一种提高RS422通信模块BIT可靠性的设计方法,从实际工程应用角度出发,阐述了RS422串行通信接口的硬件电路匹配设计及BIT软件设计,最后通过试验室验证和机上实际使用验证了该方法可以提高RS422通信模块BIT测试可靠性,降低RS422通信电路BIT的虚警率,提高产品的可靠性和可维护性。To solve the problem caused by noise from a high false alarm rate BIT within airborne computer RS422 serial communication unit,and the airborne computer RS422 communication module BIT false alarm failure characteristics were analyzed,an increased RS422 communication BIT reliability module design method,combined with practical engineering applications,describes the RS422 serial communication interface hardware design and optimization BIT design,and finally by the actual use of laboratory verification and authentication method can improve the RS422 communication module BIT test reliability,reduce the false alarm rate RS422 communication circuit BIT,improve product reliability and maintainability

关 键 词：机载计算机 串行通信 机内测试 RS422总线 可靠性 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]