公开(公告)号：US20230127366A1

公开(公告)日：2023-04-27

申请号：US17996664

申请日：2022-01-17

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Shaoyi XU ,  Zhencai ZHU ,  Wei LI ,  Wenting LU ,  Gang SHEN ,  Songyong LIU ,  Fangfang XING ,  Hongxiang JIANG ,  Lei SI

IPC: E21D9/00

Abstract: An apparatus includes a current excitation source, a roadheader telescopic protection cylinder, an electric rotating apparatus, auxiliary cutting teeth, a cutting head entity, a transmission shaft, an optical fiber ring protective housing, an optical fiber ring, an optical fiber current sensor control unit and a recovery electrode. The apparatus transmits an auxiliary current Ie and a monitoring current Id to a coal seam. The auxiliary current Ie and the monitoring current Id are homologous currents that are incompatible, and the auxiliary current Ie squeezes the monitoring current Id, so the monitoring current Id monitors the environment of the coal seam. The monitoring current Id flows to the coal seam as, and a return current If flows through the transmission shaft and a roadheader expansion part. The optical fiber ring measures the return current If, when the roadheader is heading forward and encounters abnormal geological bodies.

公开(公告)号：US20210010373A1

公开(公告)日：2021-01-14

申请号：US16766712

申请日：2019-06-18

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY ,  XUZHOU GOLDFLUID HYDRAULIC TECHNOLOGY DEVELOPMENT CO., LTD.

Inventor： Zhongbin WANG ,  Xuliang LU ,  Chao TAN ,  Haifeng YAN ,  Lei SI ,  Xingang YAO

IPC: E21D15/51 ,  G01C21/16

Abstract: A hydraulic support monitoring a support pose in real time based on an inertia measurement unit (IMU) and a detection method thereof. In the hydraulic support, IMU sensors are separately mounted on a roof beam, a rear linkage, and a base, and an auxiliary support pose monitoring system is disposed. Each IMU sensor measures movement states of the roof beam, the rear linkage, and the base of the support in real time, and the support pose monitoring system processes the movement states to monitor a support pose of the hydraulic support in real time. Especially, it can be technically determined whether the hydraulic support is adequately lowered, moved or raised, thereby effectively reducing the labor intensity of workers and improving the working efficiency of the hydraulic support.