A Novel Ultrasound-Vibration Composite Sensor for Defects Detection of Electrical Equipment

The faults of electrical equipment are mainly generated by electrical and mechanical defects, which are usually detected by external ultrasonic and vibration sensors respectively. To improve the accuracy and efficiency of the diagnosis, a novel ultrasound-vibration composite sensor (UVCS) which can detect ultrasound and vibration acceleration signals synchronously at the same place, is proposed and developed scientifically in this letter. The working principle of UVCS is based on the combination of the mass and the backing as well as the steel base and matching layer, and the structure is improved reasonably. Furthermore, the ultrasound and vibration signals can be separated by filtering. In addition, the test results on a 110kV GIS show the high precision and reliability of UVCS and illustrate the superiority in practical application.