The structure, working principle, measuring circuit and frequency characteristics of contact potential difference nondestructive testing equipment using fixed probe am intro - duced.
介绍了接触电位差法固定探头式无损探伤装置的结构，工作原理，测量电路及其频率特性。
The circuit and method for obtaining equal measuring accuracy and response speed in a wider frequency signal range are discussed in this paper.
本文探求在较大的被测频率信号范围内获得相同的测量精度与响应速度的测量方法及电路。
A method for measuring the dynamic frequency characteristics of a system with 8031 single chip microcomputer was presented, the circuit diagram was given and the software designing was introduced.
提出了用8031单片机及相应接口电路来完成系统动态频率特性测试的方法，给出了硬件的电路原理图，介绍了软件设计。
The paper introduces the precise measuring circuit of ultra-low frequency voltage based on the characteristics of the measurement of ULF.
根据超低频电压信号测量的特点，给出了一种精密测量电路。
The principle of equivalent accuracy measuring frequency, implement circuit and part of testing programs are introduced.
文章介绍了等精度测频原理，实现电路及部分测试程序流程。
This project is applied to the control circuit of the frequency converter power source of for measuring ground resistance in an electric substation.
此方案成功地应用于变电站接地电阻测量变频电源控制电路中。
This project is applied to the control circuit of the frequency converter power source of for measuring ground resistance in an electric substation.
此方案成功地应用于变电站接地电阻测量变频电源控制电路中。
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