摘要
在瞬变电磁法中,发射信号通过感性负载后信号会产生畸变,为了减小这种畸变效应,需要产生灵活可控的发射信号。本文提出了基于波形合成的低频发射机的思路,采用DDS技术和控制器控制技术结合的设计方案,研制的装置经测试可以输出三种类型的波形,且频率、幅度灵活可控,误差在3%以内。该方案为后期任意波形的灵活可调奠定了基础,动态模拟了目标信息,具有较强的实用价值。
When applying the transient electromagnetic method,the regular signal tends to be distorted in the process of passing through perceptual load.In order to minimize the distortion effect,flexible and controllable signal should be generated.This paper puts forward the thinking of the low frequency transmitters based on the waveform synthesis,reaching the conclusion of combining design scheme with controller technology and DDS technology.Finally,the test can output three types of wave,whose frequency and amplitude are flexible and controllable,with an error rate less than 3%.The scheme,which lays the foundations for flexible and adjustable arbitrary waveform and simulates the target information dynamically,is highly practical.
出处
《电测与仪表》
北大核心
2012年第4期72-75,79,共5页
Electrical Measurement & Instrumentation
关键词
低频发射机
波形合成
波形控制
数据通讯
low frequency transmitter
waveform synthesis
waveform control
data communication
