Xi'an Jiaotong University

State Grid Corporation of China

China Electric Power Research Institute

State Grid Hubei Electric Power Research Institute

Junhao Li

Jun Chen

Shuai Yuan

Hao Wang

Yuan Lin Yang

Jiangang Bi

Jun Lu

Jianfeng Liang

Yanming Li

Jinbin Li

Zhaoyu Zhang

Yanfeng Song

Haiqiong Liu

The present disclosure discloses a shear-type vibration-ultrasonic composite sensor and a measuring device. In the shear-type vibration-ultrasonic composite sensor, a metal matching layer includes an insulating layer arranged on a lower surface and a supporting pillar arranged on an upper surface, the metal matching layer is in contact with a to-be-detected object via the insulating layer, a first negative electrode face of a first normal piezoelectric element is attached to one side of the metal matching layer, a first positive electrode face of the first normal piezoelectric element is attached to a second positive electrode face of a second normal piezoelectric element, a second negative electrode face is attached to a first surface of a backing block, and a second surface of the backing block is provided with a metal housing.

Shear-type vibration-ultrasonic composite sensor and measuring device

A testing device for propagation characteristic of electromagnetic wave in gas insulated switchgear includes an ultrahigh frequency signal generator, a GIS testing chamber, an emitting antenna and a receiving antenna which are provided inside the GIS testing chamber. A detachable disc insulator is provided between the emitting antenna and the receiving antenna. Both terminals of a GIS testing chamber are sealed by polyurethane wave-absorbing sponge; the ultrahigh frequency signal generator is connected with the emitting antenna, and the receiving antenna is connected with a oscilloscope. A guide rod which is fixed by the disc insulator is provided in the GIS testing chamber. The present invention is capable of achieving testing propagation characteristic of partial discharge ultrahigh frequency electromagnetic wave signal of a gas insulated switchgear in a laboratory, so as to master attenuation characteristics of the partial discharge ultrahigh frequency electromagnetic wave signal.

Testing device for propagation characteristic of electromagnetic wave in gas insulated switchgear and testing method therefor

Growing community of inventors

Shaanxi, China

Junhao Li