基于CPLD控制的时序正弦信号发生器  

Sequential sine signal generator based on CPLD control

作　　者：殷勤[1] 陈彬[1] 汪莹[1] 

机构地区：[1]解放军理工大学工程兵工程学院,南京210007

出　　处：《电子测量技术》2007年第11期123-125,共3页Electronic Measurement Technology

摘　　要：本文根据六自由度电磁敏感定位系统的原理,采用高精度函数发生器MAX038,结合CPLD数字控制技术,设计了一种基于CPLD数字控制的时序正弦信号发生器。其发射正弦信号频率上限为20MHz,波形失真THD值为0.75%,为系统提供了精度较高、频率可调的正弦信号。CPLD数字时序控制精度为纳秒级,解决了模拟电路时序控制信号受温度影响发生漂移的问题,实现了系统持续稳定工作,提高了系统的计算精度,使系统定位计算距离误差小于1cm,角度误差小于1°。According to the theory of six-stance electromagnetic sensitivity position system, a sequential sine signal generator based on the high precision wave form generator and CPLD digital control technology is designed. The max of sine signal frequency is 20MHz and the THD is 0. 75% which provide the system with the precise and adjustable sine signal. The precision of CPLD digital sequential control can reach nanosecond level that well solved the drifting problem of timing control signal caused by temperature influence in analog circuit, and also guaranteed the stability and improved the calculating precise. The measuring error of distance is less than lcm and the measuring error of angle is less than 1°.

关 键 词：电磁敏感定位系统 高精度函数发生器 CPLD 数字控制 

分 类 号：TH119[机械工程—机械设计及理论]