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101.发明申请公开(公告)号：US20180112505A1
公开(公告)日：2018-04-26
申请号：US15325662
申请日：2015-12-28
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Baiquan LIN , Fazhi YAN , Chuanjie ZHU , Chang GUO , Quanle ZOU , Ting LIU , Yidu HONG , Hao YAO
Abstract: A method for permeability improvement for a downhole coal seam by directional fracturing with pulsed detonation waves, which is applicable to gas control in coal seam areas with high gas concentration and low air permeability. The permeability improvement method is as follows: first, drilling a pulsed detonation borehole and pulsed detonation guide boreholes from a coal roadway to a coal seam respectively; then, pushing a positive electrode connected to a positive output side of an explosion-proof high-voltage electrical pulse generator to the bottom of the pulsed detonation borehole and pushing a negative electrode connected to a negative output side of the explosion-proof high-voltage electrical pulse generator to the bottom of the pulsed detonation guide borehole; connecting the pulsed detonation borehole and the pulsed detonation guide boreholes to an extraction pipeline for gas extraction, after electrical pulsed detonation fracturing for the coal seam is carried out. The method disclosed in the present invention utilizes the high instantaneous energy provided by electrical pulsed detonation waves to fracture a coal mass, so as to form a fissure network in the coal mass between the pulsed detonation borehole and the pulsed detonation guide boreholes; thus, the air permeability coefficient of the coal mass can be increased by 200-400 times, the effective influence scope of gas extraction of a single borehole for gas extraction can be enlarged by 3-4 times, the extracted gas volume from the borehole can be increased by 3-8 times, and the coal seam gas pre-extraction time can be shortened effectively.
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公开(公告)号：US09906182B2
公开(公告)日：2018-02-27
申请号：US15308818
申请日：2015-08-19
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Hao Chen , Jiaotong Shi
IPC: H02P25/098 , H02P6/10
CPC classification number: H02P25/098 , H02P6/10
Abstract: A three-phase switched reluctance motor torque ripple two-level suppression method. A first set of torque thresholds at rotor position interval [0°, θr/3]. A second set of torque thresholds at rotor position interval [θr/3, θr/2]. Power is supplied for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by θr/3. Phase A is turned off, while phase B is turned on. An entire commutation process from phase A to phase B is divided. In rotor position interval [0°, θ1], phase A uses the second set of torque thresholds while phase B uses the first set. Critical position θ1 automatically appears in the commutation process. Total torque is controlled. In rotor position interval [θ1, θr/3], phase A uses the second set of torque thresholds, phase B uses the first set, and the total torque is controlled, suppressing torque ripples of a three-phase switched reluctance motor.
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公开(公告)号：US20180053287A1
公开(公告)日：2018-02-22
申请号：US15305350
申请日：2015-11-09
Applicant: China University of Mining and Technology
Inventor： Deqiang CHENG , Hai LIU , Leida LI , Guopeng ZHANG , Xingge GUO
CPC classification number: G06T5/008 , G06T5/002 , G06T5/20 , G06T2207/10016 , G06T2207/10024 , G06T2207/20182 , G06T2207/20201 , G06T2207/20208
Abstract: The invention relates to image processing technology field, and discloses a video image denoising and enhancing method based on random spray retinex, including: structuring spray pixel sets, and tuning parameters related to the random spray retinex based on the spray pixel sets, wherein the parameters include quantity of the spray pixel sets and quantity of pixels; processing video images with random spray retinex based on tuned parameters; denoising the video images processed by the random spray retinex via low pass filters and blur channels to get a brightness variation calculating formula; obtaining a brightness calculating, formula of output images, combined with the brightness variation calculating formula, and calculating brightness variations of three channels via the brightness calculating formula to get local brightness estimating vectors; and fusing the three channels based on the local brightness estimating vectors to get denoised and enhanced video images.
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公开(公告)号：US09891178B2
公开(公告)日：2018-02-13
申请号：US15539835
申请日：2016-07-05
Inventor： Yang Ju , Jianqiang Wang , Ruidong Peng , Lingtao Mao , Hongbin Liu
CPC classification number: G01N23/046 , G01N2223/311 , G06T11/005 , G06T2207/10081 , G06T2211/428
Abstract: An industrial CT scanning test system. The test system includes a test base, a multi-axis motion swivel table supported on the test base, a ray generator, an image acquisition device, and a fluid pressure loading device, and further includes a control device. The fluid pressure loading device includes at least one loading cylinder, and in case of performing a scanning experiment, the at least one loading cylinder is placed on a sample stage of the multi-axis motion swivel table together with a sample, and real-time loading of loads in different directions on the sample is performed according to test requirements.
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公开(公告)号：US09866166B2
公开(公告)日：2018-01-09
申请号：US15114052
申请日：2015-08-19
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
IPC: H02P25/098 , H02P25/089
CPC classification number: H02P25/098 , H02P25/089
Abstract: A four-phase switched reluctance motor torque ripple two-level suppression method in which power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by θr/4. An entire commutation process from phase A to phase B is divided into two intervals, phase A which uses the second set of torque thresholds while phase B uses the first set of torque thresholds. Critical position θ1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te+th2low and Te+th2up]. In rotor position interval [θ1, θr/4], phase A continues to use the second set of torque thresholds, phase B continues to use the first set of torque thresholds, and the total torque is controlled between [Te+th1low and Te+th1up].
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Patent Agency Ranking
公开(公告)号：US20170370156A1
公开(公告)日：2017-12-28
申请号：US15548060
申请日：2016-03-31
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Boquan LIN , TONG LIU , Yabin GAO , HE LI , Zhanbo HUANG , Rui WANG , Wei YANG
Abstract: The present invention relates to a “drilling-flushing-slotting” coupled pressure relief and permeability increasing method for a high gas outburst coal seam, which is more particularly suitable for the pressure relief and permeability increasing when gas of a roadway band of the high gas outburst coal seam is pre-extracted through crossing boreholes. On the basis of the crossing borehole pre-extraction measures for the coal seam gas, the hydraulic flushing and the hydraulic slotting are reasonably combined, and a “drilling-flushing-slotting” dedicated device is utilized to implement the coupled operation of “low pressure drilling-medium pressure flushing-high pressure slotting” in a borehole, so that the coal in the pre-extraction area is deformed and moved to form network cracks, passages are provided to the desorption flow of the gas, and the gas is easier to extract. The method can enlarge the single-hole pressure relief influence range, increase the gas permeability of the coal seam, improve the gas extraction efficiency, reduce the number of pre-extraction boreholes, shorten the pre-extraction time and have good applicability to the coal seams in different occurrence states. The present invention can reduce the number of the crossing boreholes by 32.5% and can reduce the length of each crossing borehole by 42.9%, is remarkable in coal roadway regional outburst eliminating effect, and obviously increases the tunneling speed.
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公开(公告)号：US09840399B2
公开(公告)日：2017-12-12
申请号：US14383751
申请日：2013-03-25
Inventor： Guohua Cao , Zhencai Zhu , Jiancong Qin , Hongqiao Kang , Gongbo Zhou , Wei Li , Guoan Chen , Renyuan Wu , Jianrong Yang , Yiping Ma
IPC: B66B17/18
CPC classification number: B66B17/18
Abstract: A mining elevator carrying platform and carrying method, the platform comprises a power system (1) and a four-rod carrying device (5), a rotating rod (3) connected with the power system (1) is set on the carrying device (5); the power system (1) comprises a flameproof motor (1-1), a upper-limited switch (1-2), a down-limited switch (1-5) and a main pulley (1-6), the flameproof motor (1-1) is connected with the main pulley (1-6) through a main steel cable (1-4), a baffle (1-3) is set on the main steel cable (1-4), a double cable channel is set on the main pulley (1-6), and the main pulley (1-6) is connected with a sub-pulley (1-8) by a sub-steel cable (1-7), a sliding plate (1-9) is set on the sub-steel cable (1-7), and a sliding rod (1-10) is set on the sliding plate (1-9). The main pulley (1-6) is driven to rotate by the flameproof motor (1-1) through the main steel cable (1-4), thus the sub-pulley (1-8) is driven to rotate. The sliding rod (1-10) moves in a strip-opening sliding slot in the rotating rod (3) by the sliding plate (1-9) moving up and down, then the rotating rod (3) and a carrying plate (5-1) are driven to move circumferentially. A rocker (5-3) is rotated around a supporting bracket (5-4) driven by a connecting rod (5-2), thus a credible carrying platform in multi-plane is realized. The platform is simple in structure, controlled accurately, convenient to be fixed and maintained, operated stably and reliably, and has the self-locking function.
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108.发明申请公开(公告)号：US20170297589A1
公开(公告)日：2017-10-19
申请号：US15516205
申请日：2015-12-28
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Inventor： Gongbo ZHOU , Penghui WANG , Zhencai ZHU , Chengxiang WU , Guohua CAO , Wei LI , Yuxing PENG
CPC classification number: B61B7/06 , B61C3/00 , F16H1/14 , F16H1/16 , H02K5/04 , H02K7/081 , H02K7/116 , H02K11/38
Abstract: Disclosed is a vertical rope climbing inspection robot for an ultra-deep vertical shaft steel-rope guide. The vertical rope climbing inspection robot comprises an explosion-proof shell, a driving mechanism, a wheel mechanism, a clamping mechanism, a carrying mechanism and an electric control device. The explosion-proof shell comprises an upper driving shell (2), a lower driving shell (5), a driver shell (9), an electric control device shell (8) and a carrying mechanism shell (11). The driving mechanism comprises an upper driving part, a lower driving part and an electric motor driver (21). The wheel mechanism comprises an upper driving wheel part, an upper left side driven wheel part, an upper right side driven wheel part, a lower driving wheel part, a lower left side driven wheel part and a lower right side driven wheel part. The clamping mechanism (16) comprises a left side clamping part and a right side clamping part. The carrying mechanism comprises a movable trolley (11), an intrinsic safety camera (52) and a cradle head (12). The rope climbing inspection robot can meet the explosion-proof requirements of a coal mine, can climb on the ultra-deep vertical shaft steel-rope guide and can monitor the strain of the shaft wall and the structural situation of the derrick in real-time.
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公开(公告)号：US20170272022A1
公开(公告)日：2017-09-21
申请号：US15114052
申请日：2015-08-19
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
IPC: H02P25/098 , H02P25/089
CPC classification number: H02P25/098 , H02P25/089
Abstract: A four-phase switched reluctance motor torque ripple two-level suppression method. A first set of torque thresholds is set in rotor position interval [0°, θr/4]. A second set of torque thresholds is set in rotor position interval [θr/4, θr/2]. Power is supplied to adjacent phase A and phase B for excitation. The power supplied for excitation to phase A leads the power supplied for excitation to phase B by θr/4. An entire commutation process from phase A to phase B is divided into two intervals. In rotor position interval [0°, θ1], phase A uses the second set of torque thresholds while phase B uses the first set of torque thresholds. Critical position θ1 automatically appears in the commutation process, thus obviating the need for additional calculations. Total torque is controlled between [Te+th2low and Te+th2up]. In rotor position interval [θ1, θr/4], phase A continues to use the second set of torque thresholds, phase B continues to use the first set of torque thresholds, and the total torque is controlled between [Te+th1low and Te+th1up]. This suppresses torque ripples of a four-phase switched reluctance motor and provides great engineering application values.
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公开(公告)号：US20170250635A1
公开(公告)日：2017-08-31
申请号：US15521799
申请日：2015-11-30
Applicant: China University of Mining and Technology
IPC: H02P6/24 , G05B19/416 , H02P25/086
CPC classification number: H02P6/24 , G05B19/416 , G05B2219/37312 , H02P21/20 , H02P21/36 , H02P25/08 , H02P25/086
Abstract: A braking torque closed-loop control system and method for a switch reluctance motor. The closed-loop control system comprises a torque regulator, a mode selector, a current regulator, an angle optimization controller and a torque estimator. On the basis of the rotating speed of the motor, the mode selector implements a phase current soft chopper control in a low rotating speed region and an angle position control in a high rotating speed region. The current regulator performs soft chopper hysteretic current regulation. The angle optimization controller optimizes a turn-on angle and a turn-off angle of a power converter master switch to reduce torque pulsation and improve braking energy feedback efficiency. The torque estimator conducts an on-line estimation of an actual braking torque estimated value of the motor based on an actual phase voltage and current of the motor to achieve braking torque signal feedback.
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