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Patent Agency Ranking
公开(公告)号：US11099146B1
公开(公告)日：2021-08-24
申请号：US17264412
申请日：2020-03-13
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Shaoyi Xu , Zhencai Zhu , Wei Li , Yanjing Sun , Fangfang Xing , Hongyu Xue , Qiang Peng , Feng Dong , Guang Chen
Abstract: When the heading machine tunnels, a current generated by a current excitation source enters a coal seam through a movable cutting pick to form a stray current. The stray current collected by a backflow net returns to a negative electrode of a power supply through a transition resistor. When information such as the water content of the coal seam changes, the stray current and a potential difference across the transition resistor also accordingly change, and the coal seam water content information is converted into an electric signal. When the potential difference across the transition resistor is applied to two ends of a piezoelectric ceramic, the piezoelectric ceramic extends or compresses, and the electric signal is converted into a strain signal. A sensing optical fiber converts the strain signal into an optical signal detectable by a photoelectric detector. The optical signal is analyzed to obtain the coal seam water content information.
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公开(公告)号：US11761334B2
公开(公告)日：2023-09-19
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
CPC classification number: E21D9/003 , E21C35/24 , E21C39/00 , E21D9/108 , E21D9/1006
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.
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公开(公告)号：US10768379B2
公开(公告)日：2020-09-08
申请号：US16339375
申请日：2018-06-25
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY , XUZHOU ZHONGMINE TRANSMISSION TRACK TECHNOLOGY CO., LTD.
Inventor： Shaoyi Xu , Wei Li , Fangfang Xing , Yuqiao Wang , Xuefeng Yang , Mengbao Fan , Ruilin Wang , Xianghui Wang , En Lu , Jinyong Ju , Lianchao Sheng
Abstract: A synchronous monitoring device and a method for radial and axial vibration of a shearer drum. The monitoring device includes a laser, a first optical fiber coupler, an optical isolator, a second optical fiber coupler, a third optical fiber coupler, an optical fiber collimator, a first photodetector, a second photodetector, a first signal processing module, and a second signal processing module which are disposed on a shearer ranging arm, as well as a reflective coating disposed on a shearer drum. By measuring a phase difference between original light and reflected light, axial vibration of the shearer drum is monitored, and by measuring an intensity difference between original light and reflected light, radial vibration of the shearer drum is monitored.
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4.发明授权公开(公告)号：US11307025B2
公开(公告)日：2022-04-19
申请号：US17422040
申请日：2020-07-07
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Shaoyi Xu , Zhencai Zhu , Wei Li , Fangfang Xing , Yuqiao Wang , Hongyu Xue , Qiang Peng , Guang Chen , Feng Dong
Abstract: A device and method for detecting an angle of a shearer rocker arm based on optical fiber sensing. The device includes an optical system and a mechanical system. The optical system includes a broadband light source, a polarizer, collimating lenses, a gradient-rotation media plate, a polarization beam splitter, and a data processing module. The mechanical system includes a connecting base, connecting rods, a slider, a bracket, and a sensor housing. When the shearer operates, the rocker arm converts rotation angle information to linear displacement related to a gradient refractive index by using a connecting rod mechanism, and a position on the gradient-rotation media plate through which linearly polarized light produced by the optical system passes also changes. Due to an optical rotation effect, corresponding rotation angles of a plane of polarization that are formed after the light passing through the gradient-rotation media plate also vary.
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公开(公告)号：US10962605B2
公开(公告)日：2021-03-30
申请号：US16636916
申请日：2019-04-23
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY , XUZHOU ZHONGMINE TRANSMISSION TRACK TECHNOLOGY Co., Ltd
Inventor： Shaoyi Xu , Fangfang Xing , Wei Li , Yuqiao Wang , Yao Chen , Hongyu Xue
Abstract: A method for detecting an insulation damage location in a reflux rail of a subway/coal mine and a transition resistance thereof includes the following steps: connecting a reflux rail to a negative electrode of a substation, selecting a location at a connecting point as a reference location, and mounting a potential detection apparatus at the reference location; mounting a travel distance detection apparatus and a traction current detection apparatus on a locomotive, traveling, by the locomotive, to the substation along the reflux rail, where the three detection apparatuses send respectively recorded data to a control unit; and determining, by the control unit, a potential jump from received potential data and a corresponding jump time, and determining a running distance of the locomotive at a jump moment and a total running length of the locomotive, so as to determine a ground insulation damage location.
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