摘要
测量仪器正朝着数字化、智能化、虚拟化方向发展,介绍了利用SOC单片机开发DF4812频率特性测试仪;这是一种用来测量诸如低频放大器、声学器件、各种滤波器及其它有源或无源四端网络的"幅度-频率"特性曲线的虚拟仪器,该仪器由下位机(主机)和上位机(PC机)两大部分组成,通过打印机接口进行通信;重点讨论了系统模拟数字混合(SOC)单片机及编程,系统的外围硬件主要包括信号直接数字合成器(DDS)、大规模可编程逻辑电路(CPLD)、对数放大器等电路;系统经过测试,达到了预期的设计目标,系统产品化后,取得了相当好的经济效益。
Measuring instruments have being developed to digital, intelligent, virtual instrument. This article is introducing how to develop DF4812 frequency characteristic measuring instrument based on SOC. It is a virtual instrument （device） which is applied to measure the ＂Amplitude--Frequency＂ characteristic curve of low frequency amplifier, acoustics component, various filters. This instrument is made up of two parts： Lower machine and Upper machine. It mainly discusses how to makes use of SOC single chip computer and program, with periphery including： DDS, CPLD, Logarithmic amplifier circuit etc. This system has been tested, its capability was very good.
出处
《计算机测量与控制》
CSCD
2008年第5期743-745,共3页
Computer Measurement &Control
基金
浙江省教育厅基金项目(20050222)
