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实用新型
CN203929971U 超声波局部放电分析仪 失效 - 权利终止

超声波局部放电分析仪
摘要：
本实用新型提供的超声波局部放电分析仪，包括超声波传感器、信号分析放大器、信号处理器和信号显示器四部分；超声波传感器接收局部放电产生的超声波信号，并转化为电信号输出；信号放大器将接受的电信号进行多级信号放大和滤波；信号处理器对放大的电压信号进行时域频域分析并提取特征值，包括有效值、信号峰值以及信号工频相关量，最后将这些特征值显示在显示屏上。本实用新型可以测定分析较小的局部放电信号，提高了局部放电检测的灵敏度。
摘要（英）：

The utility model provides an ultrasonic local discharge analyzer which includes four parts: an ultrasonic sensor, a signal analyzing and amplifying apparatus, a signal processor and a signal displayer. The ultrasonic sensor receives an ultrasonic signal generated from local discharge and converts the ultrasonic signal into an electrical signal for outputting. The signal analyzing and amplifying apparatus carries out a multi-stage signal amplifying process and a filtering process to the received electrical signal. The signal processor carrying out time-domain and frequency-domain analysis to an amplified voltage signal, extracts characteristic values including an effective value, a signal peak value and a signal power frequency correlative quantity, and displays the characteristic values on the signal displayer/ By means of the ultrasonic local discharge analyzer, a weak local discharge signal can be detected and analyzed and sensitivity of detection of local discharge is improved.

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