Calibration system of partial discharge supersonic detector

Abstract

The invention provides a calibration system of a partial discharge supersonic detector. The calibration system comprises a sound emission device, a sound emission transducer, a measuring device, a reference sensor, a test block, a detector under test and a clamp. The sound emission device is connected with the sound emission transducer, the measuring device is connected with the reference sensor, and the sound emission transducer, the reference sensor and a sensor under test of the detector under test are all arranged on the surface of the test block. The calibration system is used for conducting longitudinal wave sensitivity test, surface wave sensitivity test and pressure field sensitivity test on the detector under test and conducting detection test on the whole machine sensitivity, the whole machine frequency band, whole machine linearity errors and the whole machine repeatability of the detector under test. Compared with the prior art, the calibration system of the partial discharge supersonic detector is easy to implement, good in sound source repeatability, easy to operate, widely applicable to maintaining, testing and calibration of partial discharge supersonic detectors in electric power industry.

Description

technical field [0001] The invention relates to a calibration system of an ultrasonic detector, in particular to a calibration system of a partial discharge ultrasonic detector. Background technique [0002] High-voltage power equipment with insulation defects will generate partial discharge, so the insulation status of high-voltage power equipment can be learned indirectly by detecting the level of partial discharge inside the high-voltage power equipment. Partial discharge will be accompanied by external transmission of signals such as sound, light, electrical signals and chemical substances. At present, the partial discharge detection methods are mainly electric quantity detection method and non-electric quantity detection method, including pulse current method, high frequency current method, ultra high frequency method, ultrasonic method and temperature detection method, etc. [0003] Among them, the partial discharge ultrasonic detection method has a wide detection ban...

AI Technical Summary

Problems solved by technology

However, the partial discharge ultrasonic detection technology still has some reasons, such as the detection technology and means of the monitoring device are still incomplete, which affects the application effect of the monitoring device, brings difficulties to the evaluation and analysis of the monitoring results, and limits the application of ultrasonic detection technology. Further development

Effective test methods and calibration systems for ultrasonic sensors and ultrasonic detectors for partial discharge detection have not been established in the power industry

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