State Grid Tianjin Electric Power Company

Electric Power Science & Research Institute of State Grid Tianjin Electric Power Company

State Grid Corporation of China

Chun He

Chi Zhang

Qinghua Tang

Songyuan Li

Wei Fan

Zhengzheng Meng

Lin Li

Longji Li

Lei Yang

Yang Yu

Haoming Wang

Pengxian Song

Shengchen Fang

Minghui Duan

Jun Zhang

Xu Li

Ke Xu

Fengzheng Zhou

Xiaohui Zhu

Xiaoguang Wang

Jin He

Qi Zhao

Nan Wang

Rong Chen

Meng Cao

Yue Han

Xiaobo Song

Suya Li

Chuang Yao

Junji Feng

Jufang Wei

Liqing Liu

Cheng Sun

Yanwei Dong

Mingzheng Zhu

He Zhang

Chunhui Zhang

Fei Lu

Weibo Li

Jin Li

Xuliang Zhu

The present disclosure provides a defect detection method and apparatus for a cushion layer of a cable, a device, and a storage medium. The method includes: obtaining specification parameters of a corrugated sheath of a to-be-detected cable, calculating a first volume of a cushion layer without deformation and a second volume of a deformed portion of the cushion layer when the cushion layer is deformed under stress, and calculating a stressed-state deformation ratio of the cushion layer based on the first volume and the second volume; obtaining a voltage, a current, an electrode area, an electrode distance, and an initial electrode distance of the cushion layer when the stressed-state deformation ratio is reached, and calculating volume resistivity of the cushion layer; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the cushion layer.

Defect detection method and apparatus for cushion layer of cable, device, and storage medium

An internal inspection robot includes a housing, a gravity balancing apparatus, a power apparatus, and multiple sensor apparatuses. The housing is configured to be a sealed structure including a first housing, a second housing, a third housing, a fourth housing, a fifth housing, and a sixth housing. The gravity balancing apparatus is disposed inside the housing and configured to control the pose of the internal inspection robot. The power apparatus and the multiple sensor apparatuses are disposed on the surface of the housing. The power apparatus is configured to receive a motion control signal from a control terminal to drive the internal inspection robot to move. The multiple sensor apparatuses are configured to provide a sensing signal to the control terminal.

Internal inspection robot

Provided are an imaging method and system for residual stress of a basin insulator and a method for preparing a test block. The imaging method includes cutting and preparing a standard industrial sample of a basin insulator and testing the acoustoelastic coefficient of the standard industrial sample; then obtaining the residual stress data of the basin insulator and obtaining the spatial point sound velocity distribution of the basin insulator; finally, obtaining a stress distribution cloud map of the basin insulator by calculation of the attribute value and the coordinate data of a to-be-measured location, and performing reliability verification based on the residual stress data.

Imaging method and system for residual stress of basin insulator, and method for preparing test block

Defect detection method for a semi-conducting bedding layer of a power cable includes: obtaining a length parameter, a corrugation pitch parameter, radius parameters, and a thickness parameter of a power cable; obtaining a first resistance value between a shield and a corrugated sheath, and calculating a second resistance value of the shield based on the length parameter and the corrugation pitch parameter; calculating a radial resistance value of the semi-conducting bedding layer based on the first resistance value and the second resistance value; determining a contact angle of a critical point of contact between the corrugated sheath and the semi-conducting bedding layer based on the radius parameters and the thickness parameter; calculating volume resistivity of the semi-conducting bedding layer based on the radial resistance value and the contact angle; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the semi-conducting bedding layer.

Defect detection method, apparatus, and device for semi-conducting bedding layer of power cable

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Tianjin, China

Chun He