地铁车载电视检测用微型VGA信号发生器设计  

Design of Micro VGA Signal Generator for Subway Vehicle TV Detection

作　　者：杨晓珍 邓举明 孙倩 YANG Xiao-zhen;DENG Ju-ming;SUN Qian(School of Intelligent Manufacturing and Information Engineering,Ya'an Polytechnic College,Ya'an 625100,China;Vehicle Department,the Third Operation Center,Operation Branch of Qingdao Metro Group Co.,Ltd.,Qingdao 266041,China;Vehicle Department,the First Operation Center,Operation Branch of Qingdao Metro Group Co.,Ltd.,Qingdao 266041,China)

机构地区：[1]雅安职业技术学院智能制造与信息工程学院,四川雅安625100 [2]青岛地铁集团有限公司运营分公司运营三中心车辆部,山东青岛266041 [3]青岛地铁集团有限公司运营分公司运营一中心车辆部,山东青岛266041

出　　处：《机械工程与自动化》2023年第2期6-8,11,共4页Mechanical Engineering & Automation

基　　金：雅安职业技术学院教师教学创新团队建设基金(Yzyjx202103)。

摘　　要：车载电视是地铁车辆中故障率较高的设备之一,时常出现黑屏、蓝屏和花屏等画面异常现象,此时需快速诊断和确定故障原因,更换故障设备。对于车载电视画面异常现象,传统的检测方法是:更换新的车载电视,检测电视画面是否正常,若电视画面仍不正常,则可排除电视自身故障,确定故障设备为PIDS主机,此时更换新的PIDS主机即可。为快速确定车载电视画面异常现象是否由电视自身问题引起,需研制微型VGA信号发生器,该装置以FPGA芯片为核心,由该芯片读取ROM内部图像信息,通过“权电阻网路”驱动显示动态图像信息。该装置结构简单、信号稳定、便于携带、方便检测且价格低廉。Vehicle TV is one of the equipment with high failure rate in subway vehicles,and abnormal pictures such as black screen,blue screen and flower screen often appear.At this time,it is necessary to quickly diagnose and determine the cause of the fault and replace the fault equipment.For the abnormal phenomenon of vehicle TV picture,the traditional detection method is to replace the new vehicle TV to detect whether the TV picture is normal.If the TV picture is still abnormal,the fault of the TV itself can be eliminated and the faulty equipment can be determined as PIDS host.At this time,replace the PIDS host with a new one.In order to quickly determine whether the abnormal phenomenon of vehicle TV picture is caused by the problem of TV itself,it is necessary to develop a micro VGA signal generator.The device takes FPGA chip as the core.The chip reads the internal image information of ROM and displays the dynamic image information through the"weight resistance network".The device has the advantages of simple structure,stable signal,portability,convenient detection and low price.

关 键 词：车载电视 VGA FPGA 信号发生器 

分 类 号：U284.71[交通运输工程—交通信息工程及控制]