基于DSP的数字锁相放大器在LAPS检测系统中的应用  

Application of DSP-based digital lock-in amplifier on LAPS detection system

作　　者：李龙华[1] 贾芸芳[1] 

机构地区：[1]南开大学信息技术科学学院,天津300071

出　　处：《河南科技学院学报（自然科学版）》2013年第3期95-100,108,共7页Journal of Henan Institute of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金(60602002);天津市自然科学基金重点项目(12JCZDJC22400)

摘　　要：介绍了基于锁相放大技术的LAPS检测系统的基本原理,为实现高精度的LAPS检测系统,利用DSP开发板和数、模器件设计了数字锁相放大器,将数字锁相放大算法在DSP内实现.实验分析表明:基于DSP的数字锁相放大器能够用于高精度的LAPS检测系统中.The basic principle of LAPS detection system based on lock-in amplifying technology is introduced.In order to achieve high-precision LAPS detection system,digital lock-in amplifier is designed which includes DSP development board,digital devices and analog devices.The digital lock-in algorithm is implemented on the DSP chip. The experiment results show that DSP-based digital lock-in amplifier can be used for high-precision LAPS detection system.

关 键 词：LAPS DSP 数字锁相放大器 检测系统 

分 类 号：TN722[电子电信—电路与系统]