新型便携式多路开关量信号检测仪设计  

Novel Portable Instrument of Multi-channel Switching Signals Measuring

作　　者：曹洪龙[1] 胡剑凌[1] 邵雷[1] 蔡文锋[1] 

机构地区：[1]苏州大学电子信息学院,江苏苏州215006

出　　处：《仪表技术与传感器》2014年第12期127-130,共4页Instrument Technique and Sensor

基　　金：苏州大学2013年高等教育教学改革研究课题(5731502513);苏州大学-TI DSP实验室课程改革和创新项目;苏州大学计算机与信息技术实验教学中心实验教改研究课题

摘　　要：便携式多路开关量信号检测仪可以同时检测多路开关量信号,主要由上位机单板计算机和下位机多路开关量信号检测板卡两部分构成,下位机通过PC104Plus接口与上位机互联并基于PCI协议通信。下位机以DSP为核心处理器,采用基于有限状态机的跳变检测方法进行开关量信号检测,根据有效脉宽的设置进行去抖动处理,并利用跳变时间记录开关量信号。上位机应用程序可以采用主动和被动两种方式获取下位机检测的开关量信号状态信息,跳变计时精度达到20μs.A portable instrument was composed of a single board computer and a multiple signal detecting boards which can measure multi-channel switching signals real-timely. The signal detecting boards were connected with the single board computer by PC1O4Plus bus connectors, and communicated with each other by PCI protocol. A novel method based on FSM was programed in TMS320VC5416 DSP which can measure the multi-channel switching signals and filter off the dither signal by setting the threshold of pulse width. The application in the single board computer can read the status vs. time of the multi-channel switching signals from the signal detecting boards by active and passive methods, and it＇s precision is up to 20μs.

关 键 词：开关量信号 有限状态机 便携式设备 WDF驱动 PC104Plus接口 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]