860results about How to "Easy installation and layout" patented technology

The invention discloses a laser direct plate marking device for a plane screen print plate and device. The device comprises a screen frame for screen printing, a screen mesh stretched on the screen frame for screen printing, wherein the bottom of the screen mesh is coated with a photosensitive material coating, an optical component arranged below the screen frame for screen printing and used for performing exposure treatment on the photosensitive material coating, a scanning trolley for driving the optical component to reciprocate on the horizontal surface, and a longitudinal moving member for driving the optical component to shuttle on the horizontal surface; and the optical component comprises a plurality of lasers arranged on the same horizontal surfaces, the plurality of lasers are arranged on the same straight line parallel to a longitudinal central line of a rectangular screen frame from front to the back. The method comprises the following steps of confirming a control parameter of a mechanical structure, confirming a control parameter of a laser, and exposure imaging. The device disclosed by the invention is reasonable in design, low in investment cost, simple for use and operation, good in use effect, and wide in application range, and can be used for finishing the print plate manufacturing process of a screen frame in different sizes.

The invention discloses an ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility and an experimental method. The experimental facility comprises a rock core clamp holder, a ring compression feed device, an ultrasonic energy converter, an ultrasonic generator, a chemical reagent storage tank connected with a liquid inlet of the rock core clamp holder by a conveying pipeline, a water storage tank, an oil storage tank and a liquid container connected with a liquid outlet of the rock core clamp holder. The experimental method comprises the following steps of: 1, pretreating a tested rock core; 2, testing the initial permeability of the rock core through water drive; 3, polluting the rock core; 4, testing the permeability of the polluted rock core through the water drive; 5, performing an ultrasonic-assisted chemical reagent blockage removal experiment; 6, testing the permeability of the rock core subjected to the blockage removal through the water drive; 7,performing the ultrasonic-assisted chemical blockage removal experiment under the condition of ultrasonic oscillation with different frequencies and amplitudes; and 8, processing data. The ultrasonic-assisted reservoir stratum chemical blockage removal experimental facility has reasonable design, complete functions and high using effect, is easy and convenient to arrange and operate, and can realize the pulse fluctuation of the chemical blockage removal under the action of the ultrasonic oscillation.

The invention discloses a tunnel arch center installation operation vehicle. The tunnel arch center installation operation vehicle comprises a machine frame, a travelling mechanism, a traction mechanism, an arch center lifting device for lifting tunnel arch centers which are arranged on the rear part of the machine frame and are needed to be installed one by one, and an arch center transferring mechanism for transferring the arch centers which are lifted by the arch center lifting device one by one through alignment and adjustment; the arch center transferring mechanism comprises a translating trolley which can move forward and backward on the upper part of the machine frame, a lifting mechanism for stably lifting the tunnel arch centers, and a left and right movement mechanism for driving the lifting mechanism to synchronously move left and right; and the translating trolley, the left and right movement mechanism, and the lifting mechanism align and adjust the tunnel arch centers front and back, right and left and up and down respectively. The tunnel arch center installation operation vehicle has a reasonable design, is convenient to assemble, and easy and convenient to operate, safe and reliable in working performance, and good in a using effect, and can solve the problems of large working difficulty in movement and accurate positioning of steel arch centers after lifting during the installation of the conventional steel arch centers, low installation efficiency, large labor intensity and the like.

The invention discloses an automatic cutting control system and an automatic cutting control method for a coal cutter. The control system comprises a controller, a data storage device, a working condition detection apparatus for the coal cutter and a control host. The working condition detection apparatus for the coal cutter comprises a walking displacement detection unit, an angle detection unit one for detecting the swing angle of a right rocker arm, an angle detection unit two for detecting the inclination angle of a working face, an angle detection unit three for detecting the swing angle of a left rocker arm, and an angle detection unit four for detecting the upward or downward angle of the coal cutter. A left height adjustment oil cylinder and a right height adjustment oil cylinder are both controlled by the controller. The control method comprises the steps of: 1) learning and memorizing the cutting trace of the currently working coal seam; 2) accomplishing the automatic coal cutting according to the memorized trace, and adjusting the memorized trace in real time; 3) repeating step 2) until all the exploration processes of the currently working coal seal is finished. The system of the invention is advantageous by a simple circuit, a reasonable design, a convenient control method, and good application effect, and can realize the automatic cutting control of the coal cutter.

The invention discloses a co-production system and a co-production method for biomass carbon, gas, wood tar and wood vinegar. The co-production system comprises a biomass dry distillation kettle, a high-temperature heating furnace, a water cooling device, a washing device, a liquid separation device, a gas storage tank, a water-ring vacuum pump, a compressor, wood tar storage tank and a wood vinegar storage tank, wherein the liquid separation device separates wood vinegar and wood tar in the mixed liquid obtained by gas-liquid separation of the water cooling device; the co-production method comprises the following steps: 1, charging; 2, high-temperature carbonization: water cooling and gas-liquid separation, washing, gas storage and separation and storage of liquid matters; and 3, obtaining of the biomass carbon after the high-temperature carbonization. The co-production system for the biomass carbon, gas, wood tar and wood vinegar has the advantages of reasonable design, convenient processing, simple mounting arrangement, easy operation and good effect; and the co-production method has the advantages of convenient realization, high yield, low cost, fast co-production and relatively high production purity and has obvious economic and social benefits and wide popularization and application prospect.

The invention discloses a hydraulic pulse-assisted reservoir chemical remedial treatment experiment device and a hydraulic pulse-assisted reservoir chemical remedial treatment experiment method. The experiment device comprises a core holder, an annular pressure supply device, a chemical reagent storage tank, a water storage tank, an oil storage tank and a liquid container, wherein the chemical reagent storage tank, the water storage tank and the oil storage tank are connected with a liquid inlet of the core holder through delivery pipes; the liquid container is connected with a liquid outlet of the core holder; and a hydraulic pulse generating device is arranged on each delivery pipe. The experiment method comprises the following steps of: 1, preprocessing a tested core; 2, measuring the initial permeability of the core by water drive; 3, polluting the core; 4, measuring the permeability of the core by water drive after pollution; 5, performing a hydraulic pulse-assisting chemical reagent remedial treatment experiment; 6, measuring the permeability of the core by water drive after remedial treatment; 7, performing the hydraulic pulse-assisted chemical reagent remedial treatment experiment under the conditions of different frequencies and different amplitudes; and 8, arranging data. The device is rational in design, convenient to arrange, complete in function, simple to operateand good in using effect and can realize pulse fluctuation of the chemical remedial treatment under the action of an injection pressure.

The invention discloses a long tunnel fast construction process. The tunnel construction method in the direction from the entrance to the exit and the tunnel construction method in the direction from the exit to the entrance are the same and each construction section is respectively constructed from back to front. The construction process is as follows: 1, excavating construction at an initial construction section, the process is as follows: performing advance geology forecast, determining the excavating construction method for the current construction section, excavating and primary supporting; 2, excavating construction at the next construction section; 3, repeating the step 2 for multiple times until the construction tunnel is through, wherein in the tunnel construction process, found water seepage areas are timely subjected to draining treatment, and the secondary lining construction is synchronously performed on the tunnel holes formed by excavating from front to back. The long tunnel fast construction method is reasonable in design, simple and convenient in construction, safe in the construction process, short in construction process and fast in construction progress, thus effectively solving the defects and shortcomings such as large equipment investment, long construction period and slow construction progress of the existing long tunnel construction.

The invention discloses a hydraulic power pulse oil displacement experimental facility and an experimental method thereof. The experimental facility comprises a core clamping device, an annular pressure supply device, a hydraulic power pulse wave generating device, a water storage tank and an oil storage tank which are connected with the liquid inlet of the core clamping device by virtue of a water pipeline and an oil pipeline as well as a liquid container which is connected with the liquid outlet of the core clamping device; wherein the water pipeline and the oil pipeline are all provided with an intermediate container, a pumping device used for generating high pressure liquid flow and an energy storage tank. The experimental method includes the following steps: firstly, oil displacementexperiment is carried out under the condition that no hydraulic power pulse is added; secondly, oil displacement experiment is carried out while frequency and amplitude hydraulic power pulse wave of core are replaced, and meanwhile hydraulic power pulse auxiliary chemical oil displacement experiment is completed; thirdly, data processing is carried out. The invention has reasonable design, mounting convenience, simple operation and good simulation effect, can improve efficiency of oil displacement by water and crude oil recovery ratio, and experiment of hydraulic pulse wave oil displacement and hydraulic pulse wave auxiliary reservoir core oil displacement by water can be realized.

The invention discloses a household gas cooker wireless monitoring system which comprises a controller, a wireless transceiver module, a gas cooker ON-state detection unit for real-time detection of the ON state of a gas cooker, an inflammable gas concentration detection unit for real-time detection of the concentration of inflammable gas around the gas cooker, a remote wireless communication terminal for bidirectional communication through the wireless transceiver module and the controller, a clock circuit for automatic statistics of continuous working time of the gas cooker, a hand-operated parameter setting unit, an alarm unit, a solenoid electric valve, and a display unit; the solenoid electric valve is mounted at a gas supply pipe mounted at a gas inlet of the monitored gas cooker, and both the ON/OFF state and the opening degree of the solenoid electric valve are controlled by the controller. The invention is simple in structure, convenient for wiring, simple in operation, high in intelligentization degree, and good in application effect, and can solve the defects of low automation and intelligentization degrees, inconvenient usage and operation, indispensability of personal on-site hand-operated control by users, incapability of realizing remote intelligent monitoring, and the like for current gas cookers.

The invention discloses a system and a method for intelligently monitoring a belt-type conveyer for a coal mine steel wire rope core. A monitoring platform of the monitoring system comprises a variable frequency control system, a running monitoring system for monitoring the running state of a steel wire rope core conveying belt and an electromagnetic online monitoring system for monitoring whether a defect is existent in the steel wire rope core conveying belt or not and the type and the position of the existent defect. The monitoring method comprises the steps as follows: 1, starting the conveyer and electromagnetically loading; 2, positioning the connectors on the conveying belt; and 3, acquiring signals in real time and synchronously classifying the signals, namely in the continuous rotation process of the steel wire rope core conveying belt, whether the defect is existent in the steel wire rope core conveying belt or not and the type and the position of the existent defect are determined by the electromagnetic online monitoring system, and the running state of the steel wire rope core conveying belt is monitored by the running monitoring system at the same time. The system and the method are reasonable in design, simple and convenient to use and operate, convenient to realize, good in using effect and high in practical value, and integrate the functions of variable frequency control, running monitoring and electromagnetic online monitoring.

The invention provides a satellite and launch vehicle connection and separation mechanism, comprising a guide rail, a rear end cover, a front end frame, a separation spring, a push plate, a cabin door and a connection unlocking device, wherein the rear end cover is connected to the rear end of the guide rail; the separation spring is arranged in the guide rail and can stretch and retract along the direction of the rail; the push plate is arranged at the front end of the separation spring and is driven by the separation spring to move frontward or backward; the front end frame is connected to the front end of the guide rail; the cabin door is hinged to one side edge of the front end frame; when the front end frame is covered, a satellite is tightly pressed on the push plate and the separation spring, so that satellite and launch vehicle connection is realized; when the front end frame is opened, the separation spring and the push plate are released to frontward push out the satellite, so that satellite and launch vehicle separation is realized; the connection unlocking device is used for locking or unlocking the cabin door in a non-pyrotechnic door. The satellite and launch vehicle connection and separation mechanism has the advantages of low impact, simple structure, light weight, high separation precision, convenience in installation, low cost, high reliability and the like.

The invention discloses a filing layered sedimentation monitoring device and method. The monitoring device comprises a bottom sedimentation monitoring unit, a middle sedimentation monitoring unit and a ground surface sedimentation monitoring unit which are buried in a soil layer to be monitored from bottom to top and are vertically arranged. Burying holes are formed in the soil layer to be monitored. An anchoring head is arranged under the bottom sedimentation monitoring unit. The bottom sedimentation monitoring unit, the middle sedimentation monitoring unit and the ground surface sedimentation monitoring unit are all provided with inclinometer pipes, extensible pipes arranged on the outer sides of the inclinometer pipes in a sleeving mode and displacement sensors installed on the upper portions of the inner sides of the inclinometer pipes. The monitoring method comprises the steps that firstly, drilling of the burying holes is conducted; secondly, the bottom sedimentation monitoring unit is installed; thirdly, the middle sedimentation monitoring unit is installed; fourthly, the ground surface sedimentation monitoring unit is installed; and fifthly, layered sedimentation monitoring is conducted. The filing layered sedimentation monitoring device and method are reasonable in design, convenient and easy to operate, convenient to bury, high in measuring precision and capable of effectively solving the problems that existing layered sedimentation monitoring equipment is large in equipment burying workload and low in measuring precision.

The invention discloses a space positioning platform which comprises an X-direction guide rail, a Y-direction guide rail driven by an X-direction driving mechanism to be in linear reciprocating motion along the X-direction guide rail, a Z-direction guide rail driven by a Y-direction driving mechanism to be in linear reciprocating motion along the Y-direction guide rail, and a carrying platform driven by a Z-direction driving mechanism to be in up-down reciprocating motion along the Z-direction guide rail. The Y-direction guide rail is mounted on the X-direction guide rail , the Z-direction guide rail is mounted on the Y-direction guide rail, the carrying platform is mounted on the Z-direction guide rail, and the X-direction driving mechanism, the Y-direction driving mechanism and the Z-direction driving mechanism form a servo driving system for adjusting position of the carrying platform in directions X-axis, Y-axis and Z-axis of a space rectangular coordinate system. The space positioning platform is simple in structure, reasonable in design, simple and convenient to use and operate, good in using effect and high in positioning efficiency, and the problem that an existing lifting device is single in moving direction, inaccurate in positioning, poor in reliability and the like can be effectively solved.

The invention discloses batch calibration equipment and a batch calibration method for intelligent pointer-type pressure gages. The batch calibration equipment comprises a horizontal calibration platform, a horizontal testing pipe, a plurality of quick connectors for being installed on a plurality of calibration pressure meters respectively, two image acquisition devices which are located in front of the horizontal calibration platform, an image processing device, a pressurization device and a pressure regulation device which regulates pressure in the horizontal testing pipe. The batch calibration method comprises the following steps of: firstly, doing a preparation work before calibration; secondly, inputting and matching models of the pressure gages to be calibrated; thirdly, obtaining data of dial plate templates; fourth, acquiring and dividing images of dial plates, and detecting straight lines at which pointers are located; fifth, matching the templates; sixth, obtaining numberical reading of the pressure meters, and the numberical reading obtaining process comprises the following steps of: obtaining dial plate image information to be processed, matching binocular stereo-vision images and processing the data. The batch calibration equipment disclosed by the invention is reasonable in design, simple and convenient in use and operation, has a good use effect, and calibration efficiency and calibration accuracy of the pointer-type pressure gages are greatly improved.

The invention discloses an intelligent vehicle guiding system and method for medium and small parking lots. The system comprises entrance monitoring devices distributed at entrances of the parking lots, a plurality of driving guiding information display devices distributed on all crossroads in the parking lots respectively, a plurality of parking space monitoring devices distributed above parking spaces in the parking lots respectively, and an upper monitoring host distributed in a monitoring room. The method includes the first step of image information collecting and synchronous uploading and the second step of image information analyzing and processing. According to the step of image information analyzing and processing, the upper monitoring host analyzes and processes image information collected by the parking space monitoring devices and the entrance monitoring devices and analyzes and processes the information collected by the entrance monitoring devices, wherein the processes are entrance vehicle information analyzing and processing, parking space distributing, driving guiding information generating and downloading, driving guiding and parking information confirming. The intelligent vehicle guiding system is reasonable in design, convenient to achieve, good in use effect and capable of automatically distributing the proper parking spaces for vehicles and effectively guiding all the vehicles.

The invention discloses a submicron-level positioning accuracy parallel regulating platform and a regulating method thereof. The parallel regulating platform comprises a fixed platform, six stretchable struts, a moving platform, a measuring system, a controller and a parameter input unit, wherein the moving platform can move straightly at the left, right, front and rear direction and can rotate surrounding the left, right, front and rear direction; the controller is electrically connected with the measuring system; the parameter input unit is connected with the controller; and the upper end part of each stretchable strut is installed on the moving platform through a spherical hinge, and the lower end part of each stretchable strut is installed on the fixed platform through a hook hinge. The regulating method comprises the following steps: firstly, measuring the current position and posture information of the moving platform; secondly, inputting the ideal position and the ideal posture information of the moving platform; thirdly, converting and processing the stretch of each stretchable strut; and fourthly, regulating the driving. The platform provided by the invention is designed reasonably, is convenient to install, is simple and convenient to operate and is convenient to realize, has high regulation accuracy and wide application range, can be effectively suitable for accurate measuring instruments, such as a roundness measuring instrument, and satisfies the requirements of regulating the position and posture of workpieces to be tested on the accurate measuring instruments.

The invention discloses a water-rich weak surrounding rock long-and-big tunnel construction method. The method includes that a tunnel inclined shaft is arranged on one side of a main tunnel of a tunnel to be constructed, the main tunnel is divided into a tunnel entry section, a tunnel exit section and a middle connecting section connected between the tunnel entry section and the tunnel exit section, the middle connecting section is divided into an inclined shaft assisting construction entry section and an inclined shaft assisting construction exit section, and each of the tunnel entry section, the tunnel exit section, the inclined shaft assisting construction entry section and the inclined shaft assisting construction exit section is divided into multiple sections for construction. A construction method of each section includes: step 1, performing geological forecasting in advance, and when a debris flow formation exists ahead, entering a step 2, or else, entering a step 3; step 2, performing stability control construction; step 3, determining a primary supporting scheme; step 4, excavating the tunnel, and performing primary supporting construction; step 5, performing secondary lining construction on the tunnel. The water-rich weak surrounding rock long-big tunnel construction method is simple in step, reasonable in design, simple and convenient to construct, good in using effect, capable of meeting construction requirements of water-rich weak surrounding rock long-and-big tunnels, short in construction period and safe in construction process.

The invention discloses a construction process of a double-wall steel cofferdam for construction of a pier bearing platform in main river water of the Yellow River. The construction process comprises the following steps of: 1, determining the structure and the size of a cylindrical double-wall steel sleeve box used in the construction of the bearing platform in the water; 2, measuring and paying off; 3, performing cofferdam construction: gradually lowering the cylindrical double-wall steel sleeve box to a preset position by adopting hoisting equipment, and fixing the bottom of the cylindrical double-wall steel sleeve box lowered in place by adopting a supporting fixer; 4, sealing the bottom; 5, constructing drilled piles at the bottom of the bearing platform; 6, gradually pumping water, performing underwater digging, and gradually cutting a steel protecting canister; 7, constructing the bearing platform; and 8, constructing pier columns on the upper part of the bearing platform. The process is reasonable in construction step design, convenient in construction, low in construction cost and short in construction period; and integrated construction of the bearing platform and the drilled piles is realized, meanwhile, the sinking operation of the double-wall steel sleeve box can be simply, conveniently and efficiently finished with high quality, and multiple defects in the construction of the conventional double-wall steel sleeve box cofferdam are overcome.

The invention discloses a system and method for recycling and supplying mortar to multi-wire cutting machines. The system comprises a finished product mortar storage tank, a main supply pipeline, an auxiliary reflowing pipeline, a branch supply pipeline, a waste liquid back-pumping main pipeline, a waste liquid back-pumping branch pipeline, a waste liquid recycling tank, a mortar separation and purification device, a silicon carbide dense mortar storage tank, a recycled liquid storage tank, a silicon carbide dense mortar pumping pipeline, a recycled liquid pumping pipeline, a cutting liquid supplementing pipeline and a silicon carbide micropowder supplementing pipeline. The method comprises the following steps of: firstly, supplying finished product mortar: reflowing the finished product cutting mortar before the mortar is supplied to the multi-wire cutting machines, supplying the finished product cutting mortar, completing the supplying of the mortar, and then continuously reflowing the finished product cutting mortar; secondly, recycling waste mortar; and thirdly, starting a stirrer of a mortar recycling device, separating and purifying the waste mortar, compounding and recycling the finished product cutting mortar. The system is reasonably designed, simply and conveniently operated, can simultaneously supply the mortar to a plurality of cutting machines without retaining the mortar in each pipeline.

The invention discloses a construction method for enabling a shallowly buried and darkly excavated tunnel to pass through a cottage area. The construction method comprises the following steps: excavating a tunnel hole of the constructed shallowly buried and darkly excavated tunnel from back to front through a step excavation process, and performing preliminary bracing on the tunnel hole formed by excavating from back to front in an excavating process, wherein the tunnel hole consists of an upper guide hole and a lower guide hole positioned right below the upper guide hole, the rear part of the tunnel hole is connected with a vertical well, the preliminary bracing structure of the tunnel hole comprises a plurality of grating steel frameworks for supporting the tunnel hole from back to front, a layer of bar-mat reinforcement suspended on the inner wall of the tunnel hole and a concrete layer jetted on the inner wall of the tunnel hole. The process for excavating the tunnel hole of the shallowly buried and darkly excavated tunnel comprises the following steps: I, excavating the initial segment of the upper guide hole; II, excavating the initial segment of the lower guide hole; III, synchronously excavating the upper and the lower guide holes. The construction method disclosed by the invention is simple in step, reasonable in design, convenient in construction, good in construction effect, capable of simply completing the construction process of the shallowly buried and darkly excavated tunnel that passes through the cottage area, and safe and reliable in a construction process.

The invention discloses a target tracking method and system of a football robot. The target tracking method of the football robot comprises the following steps of (1) building a motion model of the football robot, (2) carrying out discretization on the motion model of the football robot to obtain a state equation of the football robot, (3) building a measurement model of the football robot, (4) building a filtering probability distribution model of a state variable xk-1 of the football robot at the time of k-1, (5) updating measurement, (6) updating prediction, (7) estimating the optimized estimated value of a state variable xk+1 of the football robot at the time of k+1, and (8) tracking a target. The target tracking system of the football robot comprises a data processor, a data storage card, a serial port communication module, a wireless communication module, an omni-directional visual module, an intelligent power module, a motion control card, a motor driving circuit module, a motor, a motor encoder and a football robot training machine. The target tracking method and system of the football robot are reasonable in design, simple and convenient to use and operate, convenient to realize, capable of rapidly and accurately tracking the target of the football robot, high in practicability, good in use effect, and high in popularization and application value.

The invention discloses a steel truss girder assembling, erecting and construction process. A steel truss girder is a girder body, the front end and the rear end of an erected steel truss girder are supported on a first permanent buttress and a second permanent buttress respectively, the steel truss girder is formed by splicing a plurality of steel truss girder segments in an end-to-end mode, and the first permanent buttress and the second permanent buttress are located on the two sides of a main riverway of a river respectively. Assembling and erecting of the steel truss girder include the first step of construction of temporary supporting systems, longitudinal sliding rails and transverse sliding rails, the second step of assembling, erecting and longitudinal moving of the steel truss girder at different times, the third step of transverse moving of the steel truss girder and the fourth step of setting of the girder, wherein in the first step, the temporary supporting systems are constructed on one side of the first permanent buttress and on one side of the second permanent buttress respectively, the two longitudinal sliding rails used for the steel truss girder to move longitudinally and the two transverse sliding rails used for the steel truss girder to move transversely are distributed on the temporary supporting systems; in the second step, the steel truss girder segments are assembled more than once from front to back and are longitudinally moved many times. The steel truss girder assembling, erecting and construction process is simple in process, reasonable in design, convenient to achieve, good in construction effect and little in construction difficulty, and the assembling and erecting processes of the steel truss girder can be conveniently and quickly achieved.

The invention discloses an intelligent steel cord conveyer belt defect identification method and an intelligent steel cord conveyer belt defect identification system. The identification method includes the following steps: (1) electromagnetic loading; (2) defect signal acquisition; (3) feature extraction; (4) training sample obtainment; (5) class priority determination; (6) multi-class model establishment; (7) multi-class model training; (8) real-time signal acquisition and synchronous class: electromagnetic detection units are adopted for real-time detection, detected signals are synchronously inputted into a data processor, features are extracted and then sent into established multi-class models, and the defect class of a detected conveyer belt is automatically outputted. The identification system comprises an electromagnetic loader, a plurality of electromagnetic detection units, the data processor and an upper computer, the data processor can automatically output the defect class of the detected conveyer belt, and the upper computer bidirectionally communicates with the data processor. The design of the invention is reasonable, the invention is easy to operate and convenient to put into practice, moreover, the using effect is good, the practical value is high, the reliability of conveyer belt defect detection is enhanced, and the efficiency of defect identification is increased.

The invention discloses a self-positioning system and a self-positioning method for a coal mining machine. The self-positioning system comprises a controller, a walking position detection unit for detecting a walking position of the coal mining machine in real time, a left mining height detection unit for detecting the mining height of a left rocker arm of the coal mining machine in real time, a right mining height detection unit for detecting the mining height of a right rocker arm of the coal mining machine in real time, and a display unit and a parameter input unit which are connected withthe controller. The self-positioning method comprises the following steps of: 1, inputting initial parameters; 2, synchronously performing self-positioning of the walking position of the coal mining machine and the mining heights of the rocker arms; and 3, outputting results. The invention has the advantages that: the self-positioning system is reasonable in design, easy and convenient to use andoperate, convenient to implement, good in using effect and high in positioning accuracy, can automatically accurately position the walking position of the coal mining machine and the mining heights of the rocker arms, and various practical problems that the conventional coal mining machine has low automation and intelligent degrees, does not have self-positioning function, has high labor intensity and poor using effect and the like are effectively solved.

The invention discloses a dualistic superposed wave reinforced oil displacing experiment device and an experiment method. The dualistic superposed wave reinforced oil displacing experiment device comprises an artificial resonance wave test table, a rock core holder, a ring-pressure supplying device, a hydraulic impulse wave generator, a high-pressure water tank, a high-pressure oil tank and a liquid container, wherein the hydraulic impulse wave generator is arranged between a liquid outlet of the high-pressure water tank and the rock core holder, the high-pressure water tank and the high-pressure oil tank are connected with a liquid inlet of the rock core holder through a water pipeline and an oil pipeline, the liquid container is connected with the liquid outlet of the rock core holder, middle transition containers are respectively arranged on the water pipeline and the oil pipeline. The experiment method comprises the following steps of: firstly, under the condition of no dualistic superposed waves, carrying out a reinforced oil displacing experiment; secondly, replacing a rock core and carrying out the reinforced oil displacing experiment on a plurality of rock cores under two wave field conditions of artificial resonance waves and hydraulic impulse waves which have different frequencies and amplitudes; and thirdly, processing data. The method has the advantages of rationaldesign, convenient distribution, complete functions, simple and convenient operation and good simulation effect and can test the final recovery ratio and the residual oil saturation of different rockcores under the conditions of two wave fields.

The invention discloses an incremental launching construction method for a large-span steel box girder spanning a constructed road. An incremental launching steel box girder spans the constructed road, is supported by five permanent buttresses, and is formed by a plurality of steel box girder segments which are spliced back to front; the five permanent buttresses are all uncovered girder double-cylinder pillars; the uncovered girder double-cylinder pillars respectively consist of two cylindrical buttresses which are supported below the left side and the right side of the steel box girder; the incremental launching construction method for the incremental launching steel box girder comprises the following steps: I, splicing jig frames; II, constructing temporary buttresses and rigid brackets; III, splicing the steel box girder and mounting guide beams; IV, mounting an incremental launching device and a second longitudinal slideway beam; V, performing incremental launching. The method disclosed by the invention is simple in step, reasonable in design, simple and convenient to construct and good in use effect, and by constructing the rigid brackets on the outer sides of the buttresses and mounting a longitudinal slideway and a transverse deviation correcting device, the incremental launching construction of the large-span steel box girder can be easily, conveniently and rapidly completed.