电缆故障源有效冲击放电信号测量电路设计  

Cable fault source effectively impulse discharge signal measurement circuit design

作　　者：罗云鹏[1] 王菌[1] 赵继超[1] 司丰 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电子技术应用》2014年第1期82-85,共4页Application of Electronic Technique

摘　　要：信号测量电路是对故障源在有效冲击放电条件下,实现发出的声信号的去干扰,快速精确测量。首先对有效冲击放电进行简要阐述,然后说明声传感器的选择和工作原理。在强干扰条件下,针对弱信号进行检测,设计具有高输入阻抗、低输出阻抗、低噪声的前置放大电路,通过带通滤波器选择被测信号,滤除干扰信号。最后,采样AD8337实现信号的自动增益控制,获得稳定、低噪声的信号输出。In the effective impulse discharge conditions, signal measurement circuit can quickly and accurately measure the aeoustic signal which the sources of the problems emitted and remove the interference signal. Firstly, this paper briefly describes the effective impulse discharge, and then explains the choice of aeoustic sensors and operating principle. Because the weak signal detection is affected by the strong interference conditions, this design has a high input impedance, low output impedance and low-noise preamplifier circuit. The Band-pass filter selects the useful signals and the interference signals can be filtered. Finally, the circuit uses AD8337 to achieve automatic gain control signal and obtain a stable, low-noise signal output.

关 键 词：测量电路 有效冲击放电 抗干扰 低噪声 自动增益 

分 类 号：TB52[理学—物理] TN721.1[理学—声学]