基于可编程器件的通信检测系统接口设计  

Design of communication detection system interface based on programmable device

作　　者：吴志抄 谭业双[1] 李召瑞[1] 孙慧贤[1] 

机构地区：[1]军械工程学院信息工程系,河北石家庄050003

出　　处：《电子技术应用》2014年第10期72-75,共4页Application of Electronic Technique

摘　　要：针对某型通信设备检测需求,借鉴虚拟仪器设计结构,以通用计算机和多功能检测接口组成检测系统。检测接口电路使用可编程器件提高检测接口的自动化程度,以FPGA为核心单元,通过DAC和ADC完成激励信号的生成和响应信号采集,并使用混合电路完成回波抵消实现检测接口的收发双工,解决了检测系统无法实时收发的问题。描述了检测接口的设计过程,给出了硬件设计电路和FPGA程序结构框图,详细分析了以高性能运算放大器为基础设计的差分放大电路、混合电路、信号调理电路的工作原理和实现方法,对于类似系统和电路的设计有一定的参考价值。In order to meet the needs of certain type of communications equipment detection,this paper uses the construction of virtual instrument design for reference and designs the communication detection system by general computer and multifunction detecting interface.Detecting interface circuit uses programmable devices enhance the automation.With FPGA as the core unit,the ADC for the production of excitation signal and DAC is used to complete the response signal acquisition.And the hybrid circuit is used for echo canceling and interface transceiver duplex,solving the problem of unable to send and receive real-time for detection system.The paper describes the design process of detecting interface,shows the hardware design circuit and the FPGA program structure diagram.Furthermore,it detailedly analyses the working principle and implementation method for both the differential amplification circuit,the hybrid circuit and signal processing circuit.For similar system and circuit design,the article has certain reference value.

关 键 词：通信检测 可编程器件 回波抵消 数/模转换 数据采集 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]