摘要
针对以往光纤气体传感器模拟信号处理电路的不足,基于DSP芯片TMS320F2812设计并实现了一种嵌入式光纤气体传感器信号处理系统;重点描述了硬件实现方法及其软件开发,其硬件主要由接口电路、高精度运放器OPA139P,32位高性能定点DSP(数字信号处理器)TMS320F2812和D/A转换芯片DAC7625组成;软件部分的主要功能是产生交流信号,完成两路输入信号滤波,相敏检波,相除、线性化处理等工作。
Aimed at the shortcomings of previous traditional optic fiber gas sensor analog signal processing circuit, a new embedded digital signal processing system based on DSP TMS320F2812 is designed. Its hardware consists of interface circuit, a high accuracy operational amplifier OPA 139P, a 32-bit fixed-point digital signal processor TMS320F2812 and a D/Aconverter. The main functions of its softwareare implemented for producing AC signals , phase sensitive demodulation, divided signals and linearization.
出处
《计算机测量与控制》
CSCD
2007年第8期1121-1123,共3页
Computer Measurement &Control
基金
国家自然科学基金(60204004)
武汉市科技晨光计划资助项目(2003500201606)
湖北省青年杰出人才基金
关键词
相敏检波
光纤气体传感器
数字信号处理
phase sensitive demodulation
optic fiber gas sensor
digital signal processing
