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China University Of Mining And Technology patents


Recent patent applications related to China University Of Mining And Technology. China University Of Mining And Technology is listed as an Agent/Assignee. Note: China University Of Mining And Technology may have other listings under different names/spellings. We're not affiliated with China University Of Mining And Technology, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "C" | China University Of Mining And Technology-related inventors


Method of estimating tension of chain of scraper conveyor

Disclosed is a method for estimating tension of a chain of a scraper conveyor, belonging to a method for estimating chain tension. The method comprises the following steps: embedding strain sensors in a plurality of scrapers of a scraper conveyor to measure the tension of weak coupling points between the scrapers and chains, converting acquired sensor signals into data signals through an a/d conversion unit, transmitting the data signals to a data control center using a wireless transmission module, further processing the tension data information of the weak coupling points through the data control center, establishing a chain tension distribution model, and determining an the estimated tension of the chain of the scraper conveyor. ... China University Of Mining And Technology

Shock-absorbing and energy-collecting roller cage shoe

A shock-absorbing and energy-collecting roller cage shoe including a base, a main energy-collecting module, two auxiliary energy-collecting modules, and a roller is provided. The base is provided with three containing spaces for containing the main energy-collecting module and the two auxiliary energy-collecting modules. ... China University Of Mining And Technology

Scraper conveyor chain tensioning device having sweeping function

A scraper conveyor chain tensioning device having a sweeping function, comprising a transmission device (2), a steering chain wheel (3), scraper chains (4), and ledges (5), wherein a chain tensioning device (1) is arranged above the scraper chains (4) arranged at the side of the steering chain wheel (3), the chain tensioning device (1) is provided with a sweeping device (12), the chain tensioning device (1) comprises a slider-crank mechanism and two chutes (13) symmetrically fixed to the ledges (5) on two sides at an inclined angle, a tensioning shaft (19) is arranged between the two chutes (13), the tensioning shaft (19) is arranged on a bearing seat (18) via a bearing, and the middle part of the tensioning shaft (19) is provided with a tensioning chain wheel (11) matching with a transmission chain; and the sweeping device (12) comprises a tensioning shaft sleeve (12-3), a plurality of groups of sweeping heads (12-2) is arranged on the circumference of the tensioning shaft sleeve (12-3) at intervals, and the sweeping heads (12-2) are fixed to the tensioning shaft sleeve (12-3) via springs (12-1). Caking coal on a scraper can be swept via scraping teeth on sweeping heads (12-2), the problems of friction, chain jumping and jamming caused by the caking coal on the scraper are solved, the scraper conveyor chain tensioning device is applicable to a middle double-chain scraper conveyor, the change on an original scraper conveyor is small, and pure mechanical transmission is adopted, thereby being simple in mechanism, convenient to assemble and disassemble, and reliable in operation.. ... China University Of Mining And Technology

Coal dropping impact energy buffer monitoring device and method for coal mine belt conveying system

A coal dropping impact energy buffer monitoring device and method for a coal mine belt conveying system. The device comprises a buffer belt roller group, a buffer bracket, buffer springs, impact energy collecting dampers, a signal converting and sending device, and an installation bottom board, the buffer belt roller group being fixed to the buffer bracket, the upper ends and the lower ends of the buffer springs and the impact energy collecting dampers being respectively connected to the buffer bracket and the installation bottom board, and the impact energy collecting dampers being connected to the signal converting and sending device fixed to the installation bottom board through guide lines.. ... China University Of Mining And Technology

Video image denoising and enhancing method and device based on random spray retinex

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.. . ... China University Of Mining And Technology

Method of performing combined drilling, flushing, and cutting operations on coal seam having high gas content and prone to bursts to relieve pressure and increase permeability

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. ... China University Of Mining And Technology

Industrial ct scanning test system

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. ... China University Of Mining And Technology

Industrial ct scanning test system and fluid pressure loading apparatus

A fluid pressure loading device applied to an industrial computed tomography scanning test system includes a body, a sample accommodating chamber and at least one fluid medium chamber being provided in the body. Each of the at least one fluid medium chamber is provided therein with a piston, the corresponding fluid medium chamber is separated into two chambers by the piston, one of the two chambers is in communication with an external hydraulic medium via oil lines provided in the body, the other of the two chambers is in communication with the sample accommodating chamber, and one end, facing towards the sample accommodating chamber, of the piston is extendable into the sample accommodating chamber. ... China University Of Mining And Technology

Fault-tolerant control method for position sensor of switched reluctance motor

A fault-tolerant control method for a position sensor of a switched reluctance motor, if the position sensor of the switched reluctance motor runs without a fault, detecting, in real time, four equal-interval or equal-angle continuous edge pulses of an output signal of the position sensor, the fourth edge pulse being the current edge pulse, and detecting time intervals (t1, t2, t3) between each two adjacent edge pulses sequentially, thereby calculating a time interval (t4) between the current edge pulse and a next edge pulse following the current edge pulse. If the position sensor of the switched reluctance motor fails, and the next edge pulse following the current edge pulse is lost, reconstructing the next edge pulse after the interval time (t4) of the current edge pulse of the output signal of the position sensor. ... China University Of Mining And Technology

A horizontally movable vertical shaft rope guide and regulating method thereof

The present invention relates to a horizontally movable vertical shaft rope guide and a regulating method thereof which are suitable for guiding of hoisting containers in vertical shafts. The vertical shaft rope guide comprises a hoisting rope, and two hoisting containers suspended from the tail ends of the hoisting rope, wherein, cage guide ropes are led through guide cage lugs arranged on the two sides respectively, a tensioner arranged on the ground at the shaft top is connected to the upper end of each cage guide rope, and a connector arranged under a steel slot at the shaft bottom is connected to the lower end of each cage guide rope; a hydraulic cylinder is connected at the other side of each tensioner and the corresponding connector, and the hydraulic cylinder is connected to the tensioner or connector. ... China University Of Mining And Technology

Mechanical rocker arm-type vertical feeding cushioning device

A mechanical rocker-arm type vertical feeding cushioning device, consisting of two identical cushioning units and a box body (7). The two cushioning units are respectively arranged with a certain height difference on the inner side of the box body (7). ... China University Of Mining And Technology

Three-phase switched reluctance motor torque ripple three-level suppression method

A three-phase switched reluctance motor torque ripple three-level suppression method. A first set of torque thresholds (th1low, th1zero, and th1up) is set in rotor position interval [0°, θr/3]. ... China University Of Mining And Technology

Four-phase switched reluctance motor torque ripple two-level suppression method

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]. ... China University Of Mining And Technology

Method for efficiently treating spontaneous ignition of remaining coal in large area goaf of shallow-buried coal bed

A method for efficiently treating spontaneous ignition of the remaining coal in a large area goaf of a shallow-buried coal bed, which method integrates leaking stoppage, airflow control and fast inerting and cooling so as to efficiently prevent and treat the spontaneous ignition of the remaining coal in the large area goaf of the shallow-buried coal bed.. . ... China University Of Mining And Technology

09/14/17 / #20170261559

Method for quantitative evaluation of switched reluctance motor system reliability through three-level markov model

A method for evaluation of switched reluctance motor system reliability through quantitative analysis of a three-level markov model. Through analysis of the operating condition of switched reluctance motor drive system under first-level faults, second-level faults and third-level faults, 4 valid states and 1 invalid state under first-level faults, 14 valid states and 4 invalid states under second-level faults, and 43 valid states and 14 invalid states under third-level faults are obtained. ... China University Of Mining And Technology

09/14/17 / #20170260859

Float-swing hydraulic support

A float-swing hydraulic support, including a top beam, shield beam, elevating frame, base, adjusting jack, two float hydraulic columns, base raising unit, advancing unit, face guard unit, telescopic beam unit, hydraulic control valve block, and a valve block support. The columns are between the top beam and base, with upper ends ball-hinged to the top beam and lower ends ball-hinged to the base; the telescopic beam unit is in the front end of the top beam, and the face guard unit is hinged to the beam unit; the upper end of the shield beam is hinged to the top beam, the lower end is hinged to the upper end of the frame; the upper end of the jack is hinged to the shield beam, the lower end hinged to the base; the ends of the advancing unit are hinged to a scraper conveyor and the base, respectively.. ... China University Of Mining And Technology

08/31/17 / #20170250635

Braking torque closed-loop control system and method for switch reluctance motor

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. ... China University Of Mining And Technology

08/03/17 / #20170222590

Three-phase switched reluctance motor torque ripple two-level suppression method

A three-phase switched reluctance motor torque ripple two-level suppression method is disclosed. A first set of torque thresholds is set in rotor position interval [0°, θr/3]. ... China University Of Mining And Technology

07/27/17 / #20170210593

Cage energy supply system and control method therefor

A cage energy supply system comprises wind power generation devices, a tail rope beam suspension device and a control device that are connected to the bottom of a cage box. The tail rope beam suspension device and the control device are located on the central axis of the bottom of the cage box, and the two sides of the tail rope beam suspension device are each connected to one wind power generation device. ... China University Of Mining And Technology

07/06/17 / #20170192044

Phase current integration method for diagnosing fault in switched reluctance motor power converter

A phase current integration method for diagnosing a fault in a switched reluctance motor power converter determines whether the main switch of a switched reluctance motor power converter is experiencing a short circuit or an open circuit fault by measuring a phase current io(t) transient value of said converter in a non-fault state as well as a present phase current i(t) transient value of said converter, so as to obtain, by an integration operation, an integration value sno of a phase current during a certain period under the non-fault state, and an integration value sn of a phase current during a certain period under a present state, the ratio en of the two values indicating a fault characteristic value.. . ... China University Of Mining And Technology

06/29/17 / #20170187314

Switch reluctance motor wide speed-regulation range cross-control method

A switch reluctance motor wide speed-regulation range cross-control method, the switch reluctance motor wide speed-regulation range control system consisting of a revolving speed regulator, a current chopper controller, an angle position controller, a chopper counter, a comparison selector and two resettable constant registers; the chopper counter counts the current chopping number of each electrical period, and according to the comparison result between a counting value of the chopper counter and a constant value set by the two constant registers, the comparison selector selects the current chopper controller or the angle positon controller, such that when in the three phases of low revolving speed, medium revolving speed and high revolving speed or in the runtime of acceleration, deceleration and uniform velocity, the current chopper controller and the angle positon controller can automatically switch, and seamlessly connect without being affected by load change, and switching from a turn-on angle to a turn-off angle will not cause fluctuation of torque or revolving speed of a switch reluctance motor, thus the switch reluctance motor system runs stably and has good value for engineering application.. . ... China University Of Mining And Technology

06/01/17 / #20170152734

Method for thermal-displacement-type strengthened extraction in drill hole

A method for thermal-displacement-type strengthened extraction in a drill hole, suitable for efficient gas extraction in a coal mine, the method comprising the following steps: arranging an extraction drill hole and a thermal displacement drill hole at intervals in a coal seam; continuously heating, by using a heat pipe (5), coal in the drill hole to form a stable temperature field; and significantly reducing gas adsorption potential by utilizing a heat effect, prompting gas desorption, and strengthening gas extraction. The method enlarges a range of effective pressure relief influence of a single hole, increases an extraction efficiency of gas in a coal seam by more than 40%, is safe, reliable and low-cost, and is easy to operate, and saves both time and labour.. ... China University Of Mining And Technology

05/18/17 / #20170138194

Method for removing hydraulic support for solid filling coal mining

A method for removing a hydraulic support for solid filling coal mining includes digging a support removing channel (3) in a coal body (2) in front of the hydraulic support (1), and laying a support removing track (4), then removing the hydraulic support from a coal conveying gateway (11) to a track gateway (5), temporary supporting is carried out by matching a single supporting column with a n-type steel beam before each hydraulic support is removed. A supporting roof is reinforced in time by means of erecting a crib (13) and grouting after each hydraulic support is removed, three grouting pipelines (12) are laid after the supports of the whole work surface are removed, and grouting is carried out in the whole finishing cut space. ... China University Of Mining And Technology

05/04/17 / #20170122822

Multipoint coal and rock mass stress real-time monitoring device and method

A multipoint coal and rock mass stress real-time monitoring device. The device is composed of a plurality of capsule pressure sensors (1), connection rods (2), three-way valves (3), a multichannel monitor (4), a multichannel control valve (5), first high-pressure oil pipes (6), second high-pressure oil pipes (7), third high-pressure oil pipes (8), a four high-pressure oil pipe (9), a high-pressure oil pump (10) and monitoring substations (11). ... China University Of Mining And Technology

04/06/17 / #20170098955

Energy supply method and device for monitoring wireless sensor node of roller

An energy supply method and device for a monitoring wireless sensor node of a roller. A node energy supply device (2) is arranged on a roller web (1). ... China University Of Mining And Technology

03/02/17 / #20170059728

Method, apparatus and device of fracture avo inversion for fractured medium

The present disclosure discloses a fracture avo inversion method for a fractured medium, wherein, said method includes: acquiring seismic data from the fractured medium; obtaining a reflection coefficient of the fractured medium, by an avo inversion for the seismic data based on a newly-built equation. The present disclosure also provides a fracture avo inversion apparatus and device for a fractured medium. ... China University Of Mining And Technology

03/02/17 / #20170059462

Device and method using infrared radiation to observe coal rock fracture development process

A device and method of using infrared radiation to observe coal rock fracture development processes, for use in experiments to monitor coal rock fracture development using infrared radiation comprises three telescopic box bodies sleeved together. An infrared thermal imager connected to a computer is arranged at the front end of the telescopic box bodies, and a light-blocking plate is installed on a rear end. ... China University Of Mining And Technology

02/16/17 / #20170044673

Co3w3c fishbone-like hard phase-reinforced fe-based wear-resistant coating and preparation thereof

A co3w3c fishbone-like hard phase-reinforced fe-based wear-resistant coating and the preparation thereof, which belongs to the field of a wear-resistant coating on the surface of a material and a preparation method thereof. The wear-resistant coating comprises: 1.89-3.77% of c, 5.4-11.7% of cr, 3.3-7.15% of ni, 28.81-57.83% of w, 4.2-8.4% of co, 0.03-0.065% of si and the balance of fe. ... China University Of Mining And Technology

01/19/17 / #20170019049

Four-phase switched reluctance motor torque ripple three-level suppression method

A four-phase switched reluctance motor torque ripple three-level suppression method. A first set of torque thresholds is set in rotor position interval [0°, θr/4]. ... China University Of Mining And Technology

01/19/17 / #20170015522

Tensioning device and tensioning method for steel wire rope of cage guide of ultra-deep vertical shaft

A tensioning device and a tensioning method for a steel wire rope of a cage guide of an ultra-deep vertical shaft. The tensioning device comprises an upper rope clamping device, a rope adjustment guide frame, a lower hydraulic rope locking device, and a lower hydraulic rope adjustment device. ... China University Of Mining And Technology

01/05/17 / #20170003263

Integrated experimental system of hydrofracturing, water jet slotting, seepage and gas displacement under true triaxial stress

This invention relates to the coal mining field, specifically, to an integrated experimental system of hydrofracturing, water jet slotting, seepage and gas displacement under true triaxial stress. This invention consists of true triaxial stress loading experimental framework, a loading system and a monitoring system. ... China University Of Mining And Technology








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