一种通用型离散量输入接口电路设计  

A Design of Universal Discrete Input Interface Circuit

作　　者：高震 张祎彤 吕俊 Gao Zhen;Zhang Yitong;Lv Jun(Xi’an Aviation Computing Technology Research Institute, AVIC, Xi’an Shaanxi 710065, China)

机构地区：[1]中国航空工业集团公司西安航空计算技术研究所,陕西西安710065

出　　处：《山西电子技术》2022年第2期26-28,共3页Shanxi Electronic Technology

摘　　要：现代飞机驾驶舱指示系统中存在大量离散量信号采集需求,为实现对多路离散量信号的集中处理,设计了一种通用型离散量输入接口电路。传统的离散量输入接口电路使用了较多元器件,通用性差,可靠性低,本文应用集成度高的离散量采集芯片,以FPGA为主控芯片实现了地/开离散量和28 V/开离散量的信号采集。同时设计了离散量输入接口电路的自检测功能。相较于传统电路,本设计方法简便灵活、通用性强,并在实际项目中成功应用,具有的较高可靠性。The indicator system of modern aircraft cockpit has a large number of acquisition requirements of discrete signals.In order to realize the centralized processing of discrete signals,a universal discrete input interface circuit is designed.The traditional discrete input interface circuit uses a lot of components,which has poor universality and low reliability.In this paper,the signal acquisition of GND/OPEN and 28 V/OPEN discrete is realized by using the discrete acquisition chip with high integration and FPGA as the main control chip.At the same time,the self-detecting function of discrete input interface circuit is designed.Compared with the traditional circuit,this design method is simple,flexible and versatile,and has been successful applied in practical projects,with high reliability.

关 键 词：离散量 输入接口 离散量芯片 自检测 

分 类 号：TP331[自动化与计算机技术—计算机系统结构]