摘要
介绍了一种基于单片机AT89C52的负载自匹配信号源的设计原理与软/硬件实现方法,该信号源可产生5kHz和62.5kHz两种频率的信号,当负载阻抗在5Ω～1.5kΩ范围内变化时,每个信号均可自动实现阻抗匹配,保证输出功率满足测试要求。该信号源用作电力电缆故障检测仪的路径仪,扩展了电缆故障检测仪的适用范围,提高了电缆故障检测的精度。
The principle and design method of an automatic load matching signal source based on AT89C52 was introduced in this paper. Two different signals whose frequencies are 5kHz and 62.5kHz can be produced by this signal source. Those two signals can achieve automatically impedance matching when the impedance varies between 5Ω and 1.5kΩ, so that the output power can meet the need of test. It was used as the signal source of power cable fault detecting route instrument, by which the applicable range of the instrument can be widened and the precision of cable fault detecting can be improved.
出处
《电测与仪表》
北大核心
2007年第3期51-54,共4页
Electrical Measurement & Instrumentation
关键词
电力电缆
故障检测
信号源
负载自匹配
power cable
fault detecting
signal source
automatic load matching
