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131 results about "Engineering controls" patented technology
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Engineering controls are strategies designed to protect workers from hazardous conditions by placing a barrier between the worker and the hazard or by removing a hazardous substance through air ventilation. Engineering controls involve a physical change to the workplace itself, rather than relying on workers' behavior or requiring workers to wear protective clothing.
Filling rate design and control method for solid filing in coal mining
The invention discloses a filling rate design and control method for solid filing in coal mining, and belongs to filling rate design and control methods in cut and fill. The filling rate design and control method includes firstly, acquiring a theoretical design value phi of a solid filling coal mining filling rate according to cut and fill objectives and control objects; comprehensively analyzing influences of main controlling factors including key filling equipment, working face arrangement, solid filling materials, mining geological conditions and cut and fill integrated technologies on the filling rate to design an engineering control value of the filling rate phi0; during engineering practice, mounting a roof dynamic monitoring device in a gob to acquire measured filing rate curves phi(L) of different advancing positions of an on-site working face through actual measurement; comparing the engineering control value phi0, and adjusting the technology and the management method to ensure a measured filling value to meet engineering design requirements and guarantee filling effect. The method provides reference for design and control of the solid filling coal mining filling rate, and provides theoretical support for on-site popularization and application of the solid cut and fill technology.
Owner:CHINA UNIV OF MINING & TECH
Multi-stage nerve network model training method based on genetic algorithm
The invention relates to a multi-stage nerve network model training method based on a genetic algorithm. The multi-stage nerve network model training method is technologically characterized by comprising the steps of preprocessing data for eliminating the physical dimension effect of a field; constructing a multi-input-layer network structure according to the number of nodes in an input layer, the number of nodes in a hidden layer and the number of nodes in an output layer; training an initial weight and a threshold by means of the genetic algorithm; updating the weight by means of an iterative algorithm; determining whether a model termination condition is satisfied according to the number of iteration times and a model error, terminating the model if the model termination condition is satisfied, and otherwise updating the weight again. According to the multi-stage nerve network model training method, a multi-stage nerve network structure is constructed for aiming at a problem that parameters in process control are periodical and deteriorate output. According to a fact that the genetic algorithm has a global searching characteristic, the multi-stage nerve network model training method is used for selecting a group of relatively reasonable initial weight for the network structure, thereby preventing local minimum point in network training, and settling a problem that the nerve network structure with only one input layer cannot settle a problem of product processing speed reduction caused by incapability of settling the parameters in a time sequence in engineering control.
Owner:NAT COMP NETWORK & INFORMATION SECURITY MANAGEMENT CENT +1
Mine safety production inspection system
InactiveCN102140929AEliminate the phenomenon of multiple signatures at one timeUnderstand and master the actual production situationMining devicesRegistering/indicating working of machinesTransceiverInformation transmission
The invention relates to a mine safety production inspection system and belongs to the technical field of engineering control. The system consists of a computer management system, a network transceiver, a front-end controller, an inspection device and an inspection point equipment box; on the basis of a computer control technology, a modern communication technology, and a data network transmission technology, the time, line and frequency data of underground site safety inspection of mine leaders and full-time safety inspection staff is uploaded to the computer management system by a data acquisition system and an information transmission line to be processed and stored so as to construct a mine safety production inspection network. Compared with the conventional safety inspection system, the system has the advantages that: the underground work of inspection staff can be monitored in real time, the phenomenon that the inspection staff sign in for many times at one time or sign in for other people at the same place is effectively avoided; and once an accident occurs, the accident reasons can be analyzed and the relevant important basis is provided for accident responsibilities.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER +6
Method for determining minimum buried depth of underground tunnel based on engineering control measures
InactiveCN102628372ALow costThe minimum buried depth is reducedUnderground chambersDrainageUnderground tunnelEngineering controls
The invention discloses a method for determining the minimum buried depth of an underground tunnel based on engineering control measures. According to the method, the influence on the buried depth of the tunnel due to the engineering control measures in the construction process of the underground tunnel is considered. The method comprises the following steps of: firstly, preliminarily determining the minimum buried depth of the tunnel according to wiring conditions at two ends of the underground tunnel; secondly, analyzing the safety in the tunnel construction process when conventional support parameters and construction parameters under the buried depth conditions; on the premise that the conventional support parameters do not meet the construction safety, further analyzing the construction risk of the tunnel under the conditions of different reinforcement measures and reinforcement parameters and determining the minimum buried depth for ensuring the construction safety of the tunnel under the condition of different engineering control measures; and finally, determining the optimally-reasonably buried depth of the tunnel on the basis of comprehensively comparing reinforcement expenses under the condition of different engineering control measures with reduced expenses caused by the reduction of the tunnel length due to the reduction of the tunnel buried depth.
Owner:CENT SOUTH UNIV +2
Secondary automatic barrier avoiding system and method of unmanned boat in high-speed state
ActiveCN109460035ASlow signal decayEnhance the imagePosition/course control in two dimensionsMarine engineeringShortest distance
The invention discloses a secondary automatic barrier avoiding system and method of an unmanned boat in a high-speed state, and provides an embedded engineering control machine and a hull control module which are arranged on the unmanned boat of AIS equipment, a microwave radar, a millimeter wave radar, a laser radar and an unmanned boat body. The method comprises the steps that barrier objects inlong and short distance are detected by using the AIS equipment, the microwave radar, the millimeter wave radar and the laser radar, and different barrier avoiding selections are adopted in the method. The method and the system have the advantages that the additional consumption of the unmanned boat brought by barrier avoiding can be reduced under the premise that the safety moving of the unmanned boat is achieved, and therefore the effective speed and range of the unmanned boat are effectively improved, and the effect is significant.
Owner:国家海洋局北海海洋工程勘察研究院 +1
Etching liquid for TFT (thin film transistor)array substrate copper conductor
ActiveCN102703902AImproved feature of shorter process windowImprove stabilitySolid-state devicesSemiconductor/solid-state device manufacturingCopper conductorPhosphoric acid
The invention relates to etching liquid for a TFT (thin film transistor)array substrate copper conductor. The etching liquid comprises primary oxidant, secondary oxidant, a chelating agent, inhibitor and additive, wherein the primary oxidant is hydrogen peroxide; the secondary oxidant is phosphoric acid, sulfuric acid and nitric acid; the chelating agent is amino compounds; the inhibitor is aminoimidazole compounds and carboxylic acid compounds; and the additive is amine compounds containing ammonia nitrogen and carboxy oxygen coordination atoms. According to the etching liquid, the characteristic of shorter process windows of the etching liquid for the copper conductors is obviously improved, the engineering control difficulty is reduced, and the stability of engineering production and the output yield are improved by means of the components and the types of the novel chelating agent and the additive; the shelf-time stability is improved, and the stability of the etching performance can be kept in the later shelf-time storage period; and the service life (more than or equal to 5,000 ppm) is prolonged, the process windows are not obviously narrowed in the later processing period, and the properties and the like are relatively stable.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD
Rural power grid engineering control system
InactiveCN103116827AGuarantee the quality of the projectReduce manual statistical workResourcesDesign standardControl system
The invention provides a rural power grid engineering control system. The rural power grid engineering control system comprises a data base unit, a man-machine interaction unit and a business application unit, wherein the data base unit is used for storing template drawing data and standard parameters of materials in rural power grid engineering design; the man-machine interaction unit is used for receiving operation commands of users and outputting display results corresponding to the operation commands; and the business application unit is respectively connected with the man-machine interaction unit and the data base unit and used for acquiring the operation commands, calculating and generating display results by utilizing designed template drawing data and the standard parameters according to the operation commands, and sending to the man-machine interaction unit. By adopting the technical scheme, the template drawing data and the standard parameters of the materials in the rural power grid engineering design is preserved in the data base unit, users can call the template drawing data and the standard parameters to perform operation through the man-machine interaction unit, accordingly design standards and goods and materials material storage used in rural power grid engineering is unified, working efficiency and data accuracy are improved, and rural power grid engineering quality is guaranteed.
Owner:STATE GRID JIBEI ELECTRIC POWER COMPANY +1
Extrusion blow moulding wall-thickness on-line control system based on image recognition technology and method thereof
InactiveCN101249721AReduce consumptionImprove performanceCharacter and pattern recognitionMaterial dimension controlBlow moldingControl system
The invention provides an on line control system of the wall thickness of an extrusion blowing molding product based on the image indication technology. The invention comprises a parison wall thickness on line detecting module, an engineering control processing module, and a die orifice gap controlling module, wherein the parison wall thickness on line detecting module is connected with the engineering control processing module, and the engineering control processing module is connected with the die orifice gap controlling module. The invention also provides an on line control method of the wall thickness of the extrusion blowing product, which comprises the following steps that: the distribution of the object parison wall thickness is achieved through debugging; the distribution information of the parison wall thickness is obtained on line; the die orifice gap curve of a head is corrected on line by adopting the fuzzy iterative learning control algorithm to ensure the wall thickness distribution of the final product to meet the requirement. The on line control system has the advantages that the system is stable, the operation is simple, the realization is easy, the cost is lower, the adjustment control can be detected and fed back in real time, the product performance is enhanced, the material consumption is reduced, and the product performance is ensured, the system can be conveniently applied to the technical innovation of prior blowing molding equipment, and the performance and the qualification rate of the blowing molding product can be remarkably enhanced.
Owner:SOUTH CHINA UNIV OF TECH
Combined test method of dynamic simulation device and engineering control system
ActiveCN102354203AMethod steps are clearEasy to implementElectric testing/monitoringClosed loopEngineering controls
The invention provides a combined test method of a dynamic simulation device and an engineering control system. The method is characterized in that: through a dynamic simulation device in a flexible direct current power transmission system, carrying out a real-time closed-loop test on a converter station level control system of a direct current power transmission systems engineering of an actual modular multilevel voltage source transverter, wherein adjusting a parameter of the dynamic simulation device is included; carrying out converter valve unlocking and locking tests of the dynamic simulation device; carrying out starting stopping flow tests of an engineering control system; carrying out power-fail recovery tests of the engineering control system and the dynamic simulation device; carrying out a zero load adjusting test of the control system; carrying out a dynamic simulation device with a passive load test with the control system; carrying out an STATCOM operation mode combined test with the control system and the dynamic simulation test device. According to the invention, an operation mode of engineering is simulated, dynamic response of an MMC transverter and alternating current and direct current fields to a control system instruction are simulated, thus verification of control system software and hardware is realized.
Owner:CHINA ELECTRIC POWER RES INST +2
A one-dimensional river network generalization and high performance one-two-dimensional coupled flood analysis method is presented
InactiveCN109190261AEffective preventionClimate change adaptationDesign optimisation/simulationNODALRiver network
The invention provides a one-dimensional river network generalization and high-performance one-two-dimensional coupled flood analysis method, comprising the steps of establishing a one-dimensional river network model, a confluence type unit model, a whole basin river network coupling model and a two-dimensional shallow water model. Zero-dimensional storage and nodal equations are computed, and control condition model elements are selected. The control effects of weir, sluice and pump on flow are analyzed by using control condition model elements. When the two-dimensional shallow water model isnumerically discretized, the position of variables in the computational grid is determined, and the flux, bottom slope source and friction drag source in the two-dimensional shallow water model are calculated. A spatial second-order accuracy scheme is constructed and a variety of boundary conditions are set. According to the data, a set of flood control control system is formed, and the numericalsimulation of the operation mode of engineering control is carried out to achieve the effective simulation and forecast of flood.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
Reclaimer reclaiming flow control method and device
InactiveCN105404318AReduce labor loadStable reclaim flowFlow control using electric meansEngineering controlsSimulation
The invention belongs to the engineering control field and discloses a reclaimer reclaiming flow control method and device. The method includes the following steps that: actual instantaneous reclaiming flow is obtained according to bucket-wheel current or bucket-wheel pressure; the obtained actual instantaneous reclaiming flow is compared with target instantaneous reclaiming flow; and the cantilever rotation speed of a reclaimer is obtained according to a comparison result. With the reclaimer reclaiming flow control method and device of the invention adopted, the workload of a driver can be reduced, and reclaiming flow can be kept stable, and work efficiency can be improved.
Owner:CHINA SHENHUA ENERGY CO LTD +1
Underground tunnel virtual double-lead control measurement method
ActiveCN104848845AFlexible layoutOptimize layoutSurveying instrumentsMeasurement costUnderground tunnel
The invention discloses an underground tunnel virtual double-lead control measurement method which comprises the following steps: in the underground tunnel engineering control and measurement process, selecting and burying one conventional branch lead according to most advantageous measurement conditions firstly, establishing virtual double leads inside the conventional branch lead in advance, and then performing field surveying and internal data processing by using a specific method strictly according to the established virtual double leads, thereby obtaining control point accomplishment of which the precision is equal to or even superior to that of conventional double leads. Therefore, underground tunnel lead control measurement has characteristics of flexibility and simplicity in arrangement and rapidness and convenience in measurement of the conventional branch lead, and high precision and high reliability of double leads, the problems that the underground tunnel lead control measurement site arrangement, measurement efficiency and measurement cost are conflicted with one another can be effectively solved, and the underground tunnel virtual double-lead control measurement method is wide in popularization prospect, can be used in various engineering control measurements, and particularly has remarkable advantages in control measurement in which the longer an underground tunnel is, the harder the measurement environment is.
Owner:CHINA RAILWAY NO 2 ENG GRP CO LTD
Ion-absorbing type rare earth in-situ mineral leaching mother liquor recovery process
ActiveCN102787236AEmission reductionAvoid churnProcess efficiency improvementEcological environmentMassif
An ion-absorbing type rare earth in-situ mineral leaching mother liquor recovery process is characterized by including the steps: determining the construction position of flow guide holes of a rare earth mother liquor recovery flow guide hole engineering control surface and forming a scarp at the position; forming a series of parallel flow guide holes along the direction of a massif and positioning the liquor recovery engineering control surface consisting of all the flow guide holes at the position which is as same as or slightly lower than that of a space curve formed at the bottom of an ore body; forming a liquor collecting open trench for collecting rare earth mother liquor on the lower portion of each flow guide hole; forming a water avoiding trench for preventing non-mother liquor from being collected into the liquor collecting open trench on the upper portion of each flow guide hole; communicating the water avoiding trench with a water avoiding trench discharging pipeline; communicating the liquor collecting open trench with a liquor collecting open trench collecting pipeline; and guiding the collected rare earth in-situ mineral leaching mother liquor to a mother liquor transfer tank at the bottommost end of the liquor collecting open trench. By the aid of the process, construction earth-disposing quantity can be decreased, construction time is greatly shortened, construction safety is enhanced, production cost is effectively reduced, and ecological environments are protected.
Owner:JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP HLDG CO LTD
Chemical poison occupational hazard risk grade evaluation method for petrochemical enterprises
ActiveCN104091086ALow costImprove Occupational Health Management EfficiencySpecial data processing applicationsEngineering controlsEngineering
The invention discloses a chemical poison occupational hazard risk grade evaluation method for petrochemical enterprises, and relates to the field of occupational health. The method includes the following steps of investigating and recording operating posts and corresponding operation types in a place to be evaluated, investigating and recording the working time, occupational exposure poisons, the working equipment airtight degree, working equipment operation time of workers and an engineering control measure corresponding to each operation type, determining the hazard grade and the exposure grade of each occupational exposure poison, obtaining the risk grade of each occupational exposure poison in each operation type and risk level grades of the corresponding operating posts according to the poison hazard grades, the poison exposure grades and risk grade evaluation rules, and making a risk evaluation report and a risk control and management report. According to the chemical poison occupational hazard risk grade evaluation method for the petrochemical enterprises, occupational disease prevention resources are used reasonably, the occupational health management efficiency is obviously improved, and the occupational health prevention and control cost of the petrochemical enterprises can be effectively reduced.
Owner:CHINA PETROLEUM & CHEM CORP +1
Kiln temperature-pressure decoupling control method, device, equipment and system
ActiveCN110108123AStable combustion air supplySmall temperature fluctuationsCharge composition/stateFurnace typesTemperature controlEngineering controls
The invention provides a kiln temperature-pressure decoupling control method, device, equipment and system, and relates to the technical field of engineering control. The method comprises the following steps: the temperature T(c) and the pressure P(c) on a zero-pressure surface are received, wherein the zero-pressure surface is positioned at an open end of a kiln body firing zone of a kiln; a temperature control loop and a pressure control loop of the kiln are partially decoupled; and a temperature control quantity T(c) and a pressure control quantity P(c) after decoupling are obtained, and are converted to the blast furnace valve openness and the smoke discharge fan rotating speed for outputting. Through use of the partial decoupling measure, the zero-pressure surface is positioned at thetail end of a preheating zone, so that the kiln internal temperature fluctuation is greatly reduced, the temperature and pressure control precision of the kiln body firing zone is improved, and the product quality is guaranteed.
Owner:厦门佳浴智能卫浴有限公司
EAST-ICRF (Experimental Advanced Superconducting Tokamak-Ion Cyclotron Resonant Heating) transmitter impedance matching and regulating system
InactiveCN101882936AStable receptionImprove anti-interference abilityTransmissionProgrammable logic controllerEngineering controls
The invention discloses a transmitter impedance matching and regulating system which mainly solves the problems of complicated regulating operation, poor regulating precision, no flexibility and long consumed time when the transmitter impedance is not matched. The regulating system comprises a directional coupler, double branch sections, a coaxial transmission line, a probe, a data acquisition card, an upper computer, a programmable logic controller (PLC), a stepper motor and a detecting circuit, wherein the upper computer realizes an algorithm of a control process by adopting the LabVIEW engineering control software, and obtains a good man-machine interaction interface.
Owner:赵洪亮
Laying method and device of engineering control network
InactiveCN104864858ASurveying instrumentsHeight/levelling measurementEngineering controlsReference ellipsoid
The invention provides a laying method and a device of an engineering control network. The laying method of the engineering control network comprises the steps that a GPS (global positioning system) control network point is selected in a measurement control area; normal height h of the GPS control network point is acquired according to geodetic height H' of the GPS control network point relative to a reference ellipsoid and height anomaly zeta 2008 of the GPS control network point; a horizontal control point is selected in the measurement control area; horizontal constraint adjustment is performed on a GPS control network by utilizing an engineering application coordinate of the horizontal control point; an engineering application horizontal coordinate of the GPS control network point is obtained; and engineering construction treatment is performed according to the normal height h and the engineering application horizontal coordinate of the GPS control network point. According to the method and the device, the horizontal coordinate and sea level elevation can be obtained in the same GPS control network.
Owner:SHANDONG JIAOTONG UNIV
Method for controlling running sand in underground engineering and grouting system therefor
InactiveCN101275393AGood safety and reliabilitySimple methodBulkheads/pilesSoil preservationEngineering controlsSlurry
The invention discloses a method for underground engineering control running sand and grouting system thereof. The method includes steps of determine running sand geology, redacting construction plan, providing construction equipment, grouting operational process, and acceptance check qualified measuring . The grouting system for implementing the method includes a boring machine, a slurry stirring implement, a mud injecting pump, a slurry carrier pipe, a motor, an exterior tube and a grouting inner pipe. The invention uses a multiple discharging solid boring tube setting up grouting method and a grouting system to change running sand into solid condition. The method has advantages of better safe reliability and being capable of crossing a running sand layer to realize open type construction. Compared with the prior technology, the method and apparatus are simple, the engineering investment is few, cost is low and the operations are convenient and harmless to human body and surroundings. Testified by experiments, the invention has practice property, and extremely obvious effect of controlling running sand. The invention gropes a novel road for underground engineering construction, and leads out a novel development direction.
Owner:SHANGHAI HUAHAI SPECIAL ENVIRONMENTAL ENGCO
Long glass fiber reinforced TPU non-slip soles and preparation method thereof
The invention relates to long glass fiber reinforced TPU non-slip soles and a preparation method thereof. The long glass fiber reinforced TPU non-slip soles are characterized in that continuous long glass fibers are added into plastic polyurethane flexible plastic, and are directionally arranged, so that the strength of soles is greatly improved; and because the soles are made from the plastic in which thousands of glass fibers embedded and cellosilk is exposed to the surface of rubber, just like tiny nails to grip the ice surface, so that the friction between the soles and the slippery road surface is increased, meanwhile, a compatilizer adopted by the invention improves the cohesive force between the fibers and TPU of sole material, and the quality of the soles is improved; in addition, a certain amount of wear-resistant agent is added when the soles are prepared, so that the abrasion resistance of the soles is increased, and the service life is improved; according to the long glass fiber reinforced TPU non-slip soles and the preparation method thereof, provided by the invention, the preparation technology of the soles is a pultrusion process, and is convenient for the automated processing engineering control.
Owner:GUIZHOU MATERIAL IND TECH INSTITUE
Simulation test method and system of valve control device based on FPGA
The invention discloses a simulation test method and system of a valve control device based on an FPGA. The method comprises the following steps: a real-time digital simulator simulates a working state of a direct current transmission system, and generates operation information corresponding to the working state; an actual engineering control protection device generates a first control parameter and a second control parameter according to the received operation information; and the real-time digital simulator respectively updates the simulated working state of the direct current transmission system according to the received first control parameter, a trigger pulse signal, the second control parameter and a state processing result of a valve block of a transverter. According to the method,the devices excluding the valve control device in a valve control system are simulated by using a valve module simulation card on the basis of the existing direct current control protection platform technology, wherein the valve module simulation card mainly performs valve block level simulation on the valve block of the transverter to perform an in-depth and comprehensive complete test on the valve control device so as to improve the simulation test capability and level of the valve control device.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
Mechanical heat dissipation artificial intelligence electrical engineering control box
InactiveCN107396606AAchieve the effect of artificial intelligence controlSave electricityCasings/cabinets/drawers detailsModifications using gaseous coolantsElectricityStart stop
The invention discloses a mechanical heat dissipation artificial intelligence electrical engineering control box, which comprises a water tank, wherein the upper surface of the water tank is fixedly connected with supporting legs and a cooling water pump, the upper surfaces of the supporting legs are fixedly connected with a control box body, the upper surface of the control box body is provided with heat dissipation inlets, the lower surface of the control box body is provided with heat dissipation outlets, the inner bottom wall of the control box body is fixedly connected with a heat dissipation fan, and the inner wall of the control box body is fixedly connected with a spiral cooling pipe. The mechanical heat dissipation artificial intelligence electrical engineering control box achieves the effect of performing artificial intelligence control on the cooling water pump, alcohol in a first induction pipe expands to jack up a third contact to be electrically connected with a first contact when the temperature inside the control box body reaches a certain value, thus the start-stop actions of the cooling water pump are controlled, the effect of saving electric energy is achieved, and the problem of wasting electrical energy caused by an artificial intelligence type control box which utilizes sensors for controlling heat dissipation is effectively solved.
Owner:万舒
Non-fan cooling device for CPU of passive baseplate type engineering controlled computer
InactiveCN1694039ASolve the cooling problemExtended service lifeDigital data processing detailsSemiconductor/solid-state device detailsEngineering controlsEngineering
The invention relates to a heat-radiating device of CPU of industry controlling computers. Its characteristics are the back end surface of CPU is connected to the isolated hold that is cavity structure. The right end surface of the isolated hold sets a roundish hole, from front to back inside the isolated hold are respectively equipped CPU heat-radiating glued board, heat-leading tube and the fixing pedestal. The end extended from the inside of the roundish hole in the right end surface of the isolated hold of the heat-leading tube is connected with the heat-radiating organ comprised of front heat-radiating wing piece, the fixing bracket of heat-radiating equipments, back heat-radiating wing piece and semiconductor refrigeration piece; compared with present technology, the structure the present invention is novel, better solves the problem of heat-radiating inside host box, prolongs the usage longevity of the heat-radiating device, increases the reliability of the heat-radiating device, reduces the damage to other components in the time and course of fan replacing, and decreases the noises brought by traditional large power CPU fan; it equips the fixing bracket of heat-radiating equipments, and the installation is more firm.
Owner:上海爱瑞科技发展有限公司
Induction type proximity switch
InactiveCN102403995AMake up for the shortcomingsCompensate for higher pricesElectronic switchingCapacitanceEngineering controls
The invention relates to an induction type proximity switch, which is composed of a 12 V Direct Current (DC) power supply, an induction electrode and a radio frequency oscillation circuit, a voltage multiplying detection circuit and a DC signal amplifying and controlling circuit, wherein the induction electrode and the radio frequency oscillation circuit are composed of an induction electrode, a silicon triode BG1, an inductance coil L1, an adjustable capacitor C2, a resistor R1, a capacitor C1 and a load resistor R2. The induction type proximity switch disclosed by the invention is mainly used for detecting, controlling through circuit, or monitoring whether a human body or a metallic object gets close to a fortified region; the induction type proximity switch is simple and reliable in circuit design structure and is made by using common electronic elements; the induction type proximity switch can be used either as a proximity switch on the engineering control aspect, or as a monitoring preceding stage of electronic security products, thus making up the problems that various monitoring devices are defective, relatively high in cost, and the like.
Owner:刘德军
Anti-rocking control method of crane
InactiveCN108549209ACompliance with control requirementsIdeal Simulation ResultsControllers with particular characteristicsState spaceEngineering controls
The invention relates to an anti-rocking control method of a crane. The method comprises the steps of calculating system energy of the crane according to an Euler-Lagrange law, thereby obtaining a kinetic equation of the crane; constructing a state space according to a PID-PID inner / outer ring control solution, afterwards expressing the state space through a state equation and an output equation,and finally finishing controlling of a swing angle and a position through a pole configuration manner, or optimizing a swing angle and a trolley position index according to a linear optimal quadraticcontrol principle when the system is transferred from an initial state to a target state. The anti-rocking control method can satisfy an engineering control requirement.
Owner:DONGHUA UNIV
Excavator control method and device and excavator
ActiveCN110409542ALarge control currentIncrease output powerSoil-shifting machines/dredgersPower flowEngineering controls
The embodiment of the invention provides an excavator control method and device and an excavator, and relates to the field of engineering control. The method comprises the steps that the temperature of hydraulic oil of the excavator and the oil return pressure of a quartering hammer are obtained; when the temperature is larger than a preset temperature value, the control current of a cooling pumpis increased; and when oil return pressure continuous preset time is larger than a preset pressure value, the control current of a main pump is reduced. The increase of the control current of the cooling pump can increase the output power of the cooling pump and improve the cooling efficiency of the hydraulic oil, so that the temperature of the hydraulic oil can be rapidly reduced, the normal operation of the quartering hammer is ensured, and the efficiency of the hydraulic system of the excavator is avoided; and the reduction of the control current of the main pump can reduce the output powerof the main pump and reduce the oil inlet flow of the quartering hammer, so that the oil return pressure of the quartering hammer is reduced, the damage of filter element of the quartering hammer caused by over-large oil return pressure is avoided, and the service life of the quartering hammer of the excavator is prolonged.
Owner:SANY HEAVY MACHINERY
Large-scale vibration engineering control device optimization arrangement method
ActiveCN106650155ASolve the optimization layoutAvoid homogeneous layoutGeometric CADDesign optimisation/simulationEngineering controlsEngineering
The invention discloses a large-scale vibration engineering control device optimization arrangement method. A control device refers to a steel spring vibration isolator. The method includes the steps of (1), determining a steel spring initial arrangement scheme according to the actual engineering; (2), building an integral finite element calculation model of a vibration isolation system; (3), determining a loading condition; (4), calculating actual bearing capacity F of each steel spring by software through finite element calculation; (5), calculating vibration isolation efficiency Etan of each steel spring according to the formula Etan=actual bearing capacity F / ultimate bearing capacity[F]; (6), uniformizing the vibration isolation efficiency and calculating the uniform vibration isolation efficiency[Eta] according to the formula [Eta]=(Eta<1>+Eta<2>+Eta<3>+...+Eta<n>) / n; (7), if the vibration isolation efficiency Etan meets the formula (Eta<n>-[Eta]) / [Eta]< / =10%, then determining the effective scheme; (8), carrying out model calculation and analysis to the whole vibration isolation model; (9), determining the final scheme if requirement for model is met, in other words, the modal calculation fundamental frequency error is lower than 10%; and (10), arranging the steel springs according to the determined final scheme.
Owner:国机集团科学技术研究院有限公司
Open cut tunnel waterproof construction method
InactiveCN104594391AImprove construction qualityImprove construction efficiencyProtective foundationUnderwater structuresEngineering controlsCement mortar
The invention relates to the field of building construction, in particular to an open cut tunnel waterproof construction method. The open cut tunnel waterproof construction method provided by the invention comprises the steps of 1) after an open cut tunnel outer formwork is removed, clearly cleaning sharp materials and sundries on concrete surfaces, flattening rough positions on the concrete surfaces and smearing exterior surfaces of lining to be flat and smooth by using cement mortar; 2) conducting open cut tunnel arch wall lining back waterproof layer construction, wherein interlayer humidity detection sensor groups are installed between layers and can communicate with an engineering control center; 3) conducting open cut tunnel inverted arch lining back waterproof layer construction, wherein interlayer humidity detection sensor groups are installed between layers and can communicate with the engineering control center. The novel open cut tunnel waterproof construction method provided by the invention has the advantages that the construction quality of the open cut tunnel construction method can be effectively improved, the construction efficiency is improved, the waterproof effect change situation can be found in time and the maintenance cost is reduced.
Owner:SINOHYDRO ENG BUREAU 4
Method for measuring river-crossing levelling altitude difference by using GPS (global positioning system)
InactiveCN102121825AReduce workloadImprove work efficiencyHeight/levelling measurementGps measurementEngineering controls
Owner:长江水利委员会长江勘测规划设计研究院 +1
Mine safety production command and dispatching system
ActiveCN103089307AHighlight substantiveSignificant progressMining devicesResourcesIslandingMonitoring temperature
The invention provides a technical scheme for a mine safety production command and dispatching system. The mine safety production command and dispatching system comprises a wireless sensor and a positioning device, wherein the wireless sensor is used for monitoring temperature, humidity and gas quality, and the positioning device is used for determining the position of a miner or a device. The sensor and the positioning device are connected through a router. The router is connected with a data transfer unit (DTU) through a coordinator, the DTU is connected with a sinking and driving engineering control platform, and the sinking and driving engineering control platform is connected with a database used for storing data. According to the scheme, the problem of a mine information isolated island is effectively solved, and the data can be managed in unified and centralized modes. The scheme is favorable for reserve estimation and economic evaluation system development, mineral deposit mining intelligent optimization and rapid evaluation system development, production planning and production process analog system development, production dispatching optimizing system development and the like.
Owner:SHANDONG GOLD GROUP
On-site extraction, drainage and liquid collection process with auxiliary tunnels
ActiveCN101906536AHigh recovery rateIncrease moisture contentUnderground miningFluid removalCollection systemRare earth
Owner:JIANGXI RARE EARTH & RARE METALS TUNGSTEN GRP HLDG CO LTD
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