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35results about How to "Adapt to engineering needs" patented technology
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Calculating method for maximal lifting height of viscous debris flow and application of calculating method
InactiveCN105369768AHigh precisionReasonably determine the maximum rush heightMarine site engineeringCalculated resultLevel line
The invention discloses a calculating method for maximal lifting height of viscous debris flow and an application of the calculating method. The method comprises the following steps: taking a mud level line, in a natural channel, of the viscous debris flow as a datum line, and taking a maximal distance, lifted by the debris flow, of the perpendicular datum line on the mud level line in the process that the viscous debris flow encounters an obstacle as a maximal value of lifting height of the viscous debris flow; and determining volume-weight gamma c of the viscous debris flow, an included angle theta between a debris flow motion direction and a channel obstacle, average longitudinal shrinking slope J of the debris flow channel, a viscosity coefficient eta, yielding stress tau b and depth H of debris flow above an original channel surface, thereby determining the maximal lifting height value of the debris flow which encounters the obstacle in a motion process. The method is high in calculated result, simple and convenient in calculating, used for designing safety height of debris flow blocking engineering and adaptive to engineering needs.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Method for measuring viscous mud-flow internal flow velocity and impact force spatial distributions
ActiveCN106446411AHigh precisionClear thinkingHuman health protectionGeometric CADPhysicsViscous liquid
Aiming at solving the problems that flow velocity and impact of any point in any section of mud-flow cannot be measured in the prior art, the invention first provides a method for measuring viscous mud-flow internal flow velocity and impact force spatial distributions. The method for measuring flow velocity is based on the viscous mud-flow body Bingham model and the scour-and-fill balance principle; first, setting any section I-I, determining values such as h0, h(x), xa, xd, xb, xc of the section through the trial method; then calculating the flow depth of a mud-flow calculation infinitesimal surface at any point on the section according to formula 1; and finally substituting h into the Bingham-model-based viscous mud-flow flow velocity distribution formula to obtain flow velocity of the point. By means of the method for measuring flow velocity at any position in any section of mud-flow, the method for measuring spatial distribution of viscous mud-flow impact force is further obtained. The calculation result of the method has high accuracy, which can be applied in real design for viscous mud-flow prevention and control engineering. The measurement method is clear in thinking and simple in calculating, which is an improvement of the present prevention and control engineering design method which is based on uniform distribution.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Calculation method of scouring bridge pier by debris flow
ActiveCN108009363ADetermine the degree of washoutComputational ConsiderationsGeometric CADDesign optimisation/simulationImaging processingErosion rate
The invention discloses a calculation method of scouring a bridge pier by debris flow. The method includes: establishing an erosion rate formula of scouring a bridge by the debris flow, wherein it isassumed that the debris flow is homogeneous mixture and is in an incompressible state in a motion process, an empirical parameter xi is introduced, and the revised erosion rate formula is obtained; completing numerical calculation according to working condition physical-parameters determined by scouring the bridge by the debris flow, wherein the revised erosion rate calculation formula is transformed into a vector form, dispersion on time and space is carried out, the physical parameters of the debris flow are determined, assignment is carried out, a finite volume method is adopted for solvingof the flux Riemann problem, solving is respectively carried out in x and y directions according to the above-mentioned dispersion equations and calculation formats, scouring condition judgement is carried out according to the revised erosion rate formula, and thus a calculation cycle is completed; and carrying out visualization processing to obtain scouring information results, wherein computergraphics and image processing technology are utilized to convert calculation data into graphs or images for output, and conclusions of scouring the bridge pier by the debris flow are obtained.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
Method of calculating maximum scour depth of rear part of debris flow drainage canal transverse sill and applications
InactiveCN104848825AEasy to calculateAdapt to engineering needsMeasurement devicesBody weightSediment
The invention discloses a method of calculating the maximum scour depth of a rear part of a debris flow drainage canal transverse sill and applications. The calculation method comprises steps: a designed longitudinal slope for the drainage canal, a designed distance between transverse sills, a designed height of the transverse sill over a gully bed, and a designed width for the drainage canal are firstly determined; a debris flow body weight, a gully bed sediment weight, a debris flow viscosity coefficient and a debris flow yield stress are then determined; a debris flow depth and a debris flow velocity are then determined; and finally, according to the maximum scour depth calculation formula for the gully bed at the rear part of the transverse sill, the maximum scour depth of the gully bed at the rear part of the soft foundation energy dissipative-type debris flow drainage canal transverse sill is determined. The method comprehensively considers the gully bed condition and debris flow features, rear transverse sill scour features are also combined, the maximum scour depth calculation formula for the rear part of the drainage canal transverse sill is obtained through theoretical derivation, the maximum scour depth of the gully bed at the rear part of the transverse sill in different conditions can be reasonably determined, a scientific basis is provided for the debris flow disaster prevention engineering design, and the calculation method is simple and convenient and can meet engineering needs.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Calculation method for ground surface settlement outside foundation pit due to dewatering of incomplete well in the foundation pit of phreatic stratum
InactiveCN110321576AImprove calculation accuracyReduce mistakesGeometric CADDesign optimisation/simulationEngineeringModel test
The invention discloses a calculation method for ground surface settlement outside a foundation pit due to dewatering of an incomplete well in the foundation pit of a phreatic stratum. The calculationmethod comprises the following steps: S1, performing precipitation model test design in the foundation pit; S2, fitting the precipitation curve; S3, dividing the precipitation curve in the step S1 into a sparse part and a saturated part; S4, calculating the settlement amount of the drainage area by adopting a first specification formula, and calculating the settlement amount of the saturation area by adopting a second specification formula; and S5, calculating the final settlement amount of the ground surface outside the pit by adopting a third formula. Verification data show that the calculation method has the advantage of high accuracy and can meet the existing engineering requirements. Theoretical basis and basis are provided for research of foundation pit continuous wall deformation caused by incomplete well precipitation in the foundation pit, and meanwhile important reference is provided for design and construction of foundation pit engineering dewatering.
Owner:BEIJING JIAOTONG UNIV
Configuration optimization method of double-planet-row power dividing hybrid power system
ActiveCN112319460AFull range of configurationsAdapt to engineering needsHybrid vehiclesConfiguration optimizationControl engineering
The invention relates to a configuration optimization method of a double-planet-row power split hybrid power system, which comprises the following steps of generating a configuration library accordingto a clutch constraint condition and a possible connection relationship between components; removing configurations which do not meet configuration constraint conditions, and establishing a general energy management strategy of each configuration; obtaining a preliminary optimization configuration library based on a longicorn beard search algorithm; establishing a candidate scheme set screening module; obtaining an optimized configuration of each preliminary optimized configuration based on a particle swarm optimization algorithm and a candidate scheme set screening module; and screening based on the candidate scheme set screening module to obtain an optimal configuration. Compared with the prior art, all feasible configurations of the double planet rows are comprehensively and optimallydesigned, and engineering requirements of different user design objectives can be met; the comprehensive performance evaluation indexes of the economy, the dynamic property, the comfort and the reliability of the configuration are used as an optimization objective function, and the particle swarm optimization algorithm is combined to realize the quick optimization of the optimal scheme of the comprehensive performance of the configuration.
Owner:TONGJI UNIV
Fiber bragg grating pressure sensor capable of achieving positive and negative pressure monitoring and testing method
InactiveCN103900756AEliminate hidden dangers of electrification and intrinsic unsafetyIncrease capacityFluid pressure measurement by optical meansFiberGrating
The invention discloses a fiber bragg grating pressure sensor capable of achieving positive and negative pressure monitoring and a testing method. The fiber bragg grating pressure sensor comprises a connector, a filter screen, a base, an outer shell, a corrugate pipe, a first fiber bragg grating, a second fiber bragg grating, an optical fiber, an optical cable connector, an armored optical cable, a brace, a flange plate, an outer shell cover and a strain beam, wherein the outer shell cover is used for protecting the optical fiber from a sealing glue sealing part to an optical cable connector part, and the strain beam is used for applying prestress. The fiber bragg grating pressure sensor capable of achieving the positive and negative pressure monitoring and the testing method are suitable for the monitoring of pressure safety of oil and gas pipelines, urban underground gas pipelines, heating power pipelines, water supplying pipelines, oil tank pipelines, oil conveying pipelines and other pipe networks, the potential safety hazards that an electronic sensor is electrified and is unsafe in nature are eliminated, and meanwhile the capacity of phases is also improved greatly; the fiber bragg grating pressure sensor is applied to the aspect of real-time online monitoring of coal and rock mass gas pressure, errors caused by single data monitoring are avoided, the sensitivity and the accuracy of the system are improved, manpower, material resources and time are saved, and meanwhile the danger probably brought by personnel on site can be avoided.
Owner:SHANDONG MICRO PHOTOGRAPHIC ELECTRONICS +1
Fiber bragg grating displacement sensor capable of conducting multi-point measurement
ActiveCN103759659ASensitivity adjustableAdapt to engineering needsUsing optical meansFiberFiber Bragg grating
The invention discloses a fiber bragg grating displacement sensor capable of conducting multi-point measurement. The fiber bragg grating displacement sensor comprises a sensor outer shell and an anchor jaw structure. Two symmetrically-arranged supports are arranged in the sensor outer shell, the outer sides of the supports are respectively provided with a pressing guide column, the inner sides of the supports are provided with pressing springs respectively, the supports are further provided with precision guide rails and precision sliding rails, the precision guide rails are in clearance fit with the precision sliding rails, a spring pulling rod is further arranged below the supports, and extension springs are fixed on the upper portions of the precision guide rails and the upper portion of the spring pulling rod and used for tensioning the precision sliding rails to enable the precision sliding rails to perform reciprocated sliding in the precision guide rails. According to the actual use requirement, the flexibility and the measuring range of the sensor can be selected, the slope heights of the precision guide rails can be changed to adjust the flexibility of the sensor, and the slope lengths of the precision guide rails can be changed to adjust the measuring range.
Owner:SHANDONG MICRO PHOTOGRAPHIC ELECTRONICS
Full-flexible hinge micro-displacement amplification mechanism
ActiveCN110323965ACompact structureSufficient support rigidityPiezoelectric/electrostriction/magnetostriction machinesMicro nanoCoupling
The invention discloses a full-flexible hinge micro-displacement amplification mechanism, and belongs to the field of the flexible micro-nano. A piezoelectric ceramic is fixed in the middle of a rightbase of a support frame, and is connected with the middle part of a first lever of an amplification mechanism; a top end of the first lever is connected with the right base, and the lower side of thefirst lever is connected with the lower side of a second lever; a bottom end of the second lever is connected with a base of the support frame, the upper side of the second lever is connected with the lower side of a third lever, the bottom end of the third lever is connected with a middle base of the support frame, the top end of the third lever is connected with the bottom end of a right displacement conduction rod, and the right displacement conduction rod top end is connected with the bottom of an output platform. The full-flexible hinge micro-displacement amplification mechanism disclosed by the invention is a symmetric structure, a left side structure and a right side structure are completely same; the connection between the levers is the arc flexible hinge connection. The amplification mechanism can provide enough driving force for the whole mechanism, the structure is more compact, the entire rigidity is greater, the movement is stable, free from lubrication, zero in lagging,high in precision, and free from assembling error, capable of basically eliminating the coupling error and more suitable for the engineering demand.
Owner:HARBIN ENG UNIV
Method for measuring and calculating intervals between rib sills of soft foundation energy dissipation type debris flow drainage groove and application
InactiveCN104831679AEasy to calculateAdapt to engineering needsMarine site engineeringInformaticsEngineeringTopographic map
The invention discloses a method for measuring and calculating intervals between rib sills of a soft foundation energy dissipation type debris flow drainage groove and application. According to the method for measuring and calculating the intervals between the rib sills, firstly, the longitudinal gradient of the drainage groove is determined according to measurement and calculation of a large scale topographical map or field investigation and actual measurement; then, the weight degree of debris flow is determined according to calculation of a debris flow weight degree calculation formula or actual sampling and actual measurement; finally, the intervals between the rib sills of the soft foundation energy dissipation type debris flow drainage groove are determined according to the measurement and calculation formula of the intervals between the rib sills. According to the method, the three major factors of the longitudinal gradient of the drainage groove, the weight degree of the debris flow and the buried depth of the rib sills of the drainage groove are comprehensively considered, the measurement and calculation formula of the intervals between the rib sills of the soft foundation energy dissipation type debris flow drainage groove is obtained by means of the arrangement characteristic of the rib sills of the soft foundation energy dissipation type debris flow drainage groove and data fitting performed according to an indoor simulation test result, the intervals between the rib sills under different conditions can be reasonably determined, a scientific basis is provided for designing debris flow disaster prevention and treatment engineering, and the measurement and calculation method makes calculation easy and convenient and meets the requirements of the engineering.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI +1
Low-prestress high-ductility mixed reinforced concrete pile and manufacturing method thereof
ActiveCN114134883AMeet different crack resistance requirementsMeet the bearing capacity requirementsClimate change adaptationShaping reinforcementsReinforced concretePre stress
The invention relates to the field of building concrete piles, in particular to a low-prestress-degree and high-ductility mixed reinforced concrete pile and a manufacturing method thereof.The low-prestress-degree and high-ductility mixed reinforced concrete pile comprises a concrete pile body and a reinforcement cage assembly matched with the concrete pile body in section shape; the shear-resistant stirrups are fixed to the peripheries of the prestressed steel bars in a surrounding mode and are arranged in a full-length mode. The prestressed steel bars comprise prestressed steel bars and strength steel bars which are arranged at intervals, the tension control stress sigma con of the prestressed steel bars is 0.5-0.6 time of the tensile strength standard value fptk, and the tension control stress sigma con of the strength steel bars is 0.5-0.6 time of the yield strength standard value fyk of the strength steel bars; the problems that a traditional PHC concrete pipe pile is low in bearing capacity and poor in ductility are solved, meanwhile, compared with a PRC mixed reinforcement pipe pile, the deformation capacity after high-strength hot-binding ribbed steel bars are yielded can be fully utilized, and therefore the ductility and safety storage of components are improved, and the high-strength hot-binding ribbed steel bars can be more widely applied to seismic fortification intensity areas.
Owner:ZHENGZHOU UNIV
Calculation method for ground surface settlement outside pit caused by incomplete well precipitation in confined water stratum foundation pit
InactiveCN110321577AImprove accuracyAdapt to engineering needsGeometric CADSpecial data processing applicationsConfined waterCurve fitting
The invention discloses a calculation method for foundation pit exterior dewatering caused by precipitation in a confined water stratum foundation pit. The calculation method comprises: S1, conductingfoundation pit interior precipitation model test design; S2, applying a fitting method to the precipitation curve to obtain a curve fitting formula of precipitation outside the foundation pit causedby precipitation in the foundation pit of the confined water stratum, the fitting formula being; S3, calculating the settlement amount of the confined water stratum by adopting a first formula; wherein the first formula is shown in the specification. A Theoretical basis and a basis are provided for research on foundation pit continuous wall deformation caused by incomplete well dewatering in the foundation pit of the confined water stratum, and meanwhile important reference is provided for design and construction of foundation pit engineering dewatering.
Owner:BEIJING JIAOTONG UNIV
Offshore wind power floating foundation integrated with chemical energy storage system
PendingCN112606961ASafe and stable operationMaintain temperatureWind energy with garvitational potential energyWind motor supports/mountsWind drivenElectric cables
An offshore wind power floating foundation integrated with a chemical energy storage system comprises a floating supporting platform, a gravity type anchoring structure and the chemical energy storage system, the lower portion of the floating supporting platform is connected to the gravity type anchoring structure through a mooring cable, and a wind driven generator is located on the upper portion of the floating supporting platform and connected with the floating supporting platform. The chemical energy storage system is located in the gravity type anchoring structure and connected with the wind driven generator through a cable, and the submarine cable is connected with the chemical energy storage system and led out of the gravity type anchoring structure to be connected with a power grid. The chemical energy storage system adjusts or periodically adjusts electric energy input to the power grid by the wind driven generator in real time according to power output characteristics of the wind driven generator. The offshore wind power floating foundation has the characteristics of simple structure, good stability, good adaptability and capability of effectively reducing or eliminating the impact of overlarge fluctuation of the existing offshore wind power on a power grid.
Owner:CHINA THREE GORGES CORPORATION
Advanced three-dimensional resistivity cross-hole CT boulder detection system and detection method carried by shield tunneling machine
ActiveCN105804763BSolving the problem of advanced detectionBreak through the bottleneckTunnelsElectric/magnetic detectionThree-dimensional spaceEngineering
The invention discloses an advanced three-dimensional electrical resistivity cross-hole computed tomography (CT) solitary stone detection system carried by a shield tunneling machine and a detection method. The system comprises an advanced drilling device capable of drilling at least four drill holes in the rock surface. The multiple drill holes form a three-dimensional detection space. The advanced drilling device comprises a drilling machine. The bottom of the drilling machine is movably fixed to a rail on the inner circumference of a shield. A drill bit of the drilling machine penetrates through an advanced grouting hole of the shield. The system further comprises a detection electrode coupling device which stretches into the drill holes, is provided with a plurality of electrodes, and is capable of releasing electrolytes to the electrodes. The detection electrode coupling device is connected with a host machine used for applying a three-dimensional space electric field through a cable. The advanced three-dimensional electrical resistivity cross-hole CT solitary stone detection system carried by the shield tunneling machine and the detection method have the beneficial effects that the defects that holes cannot be drilled in a cutter head of the shield tunneling machine, or a drilling device cannot be installed on a tunnel face are effectively overcome; the advanced drilling device is installed in the shield of the shield tunneling machine, and advanced drilling is achieved through the advanced grouting hole in the shield of the shield tunneling machine; and difficulty in the prior art is overcome, and simplicity and convenience are achieved.
Owner:山东百廿慧通工程科技有限公司
Offshore wind power floating foundation integrated with electrochemical energy storage device
PendingCN112606962ASafe and stable operationMaintain temperatureWind energy with garvitational potential energyWind motor supports/mountsWind drivenElectric cables
An offshore wind power floating foundation integrated with an electrochemical energy storage device comprises a floating supporting platform, a gravity type anchoring structure and the electrochemical energy storage device, the lower portion of the floating supporting platform is connected to the gravity type anchoring structure through a mooring cable, and a wind driven generator is located on the upper portion of the floating supporting platform and connected with the floating supporting platform. The electrochemical energy storage device is located in the gravity type anchoring structure and connected with the wind driven generator through a cable, and the submarine cable is connected with the electrochemical energy storage device and led out of the gravity type anchoring structure to be connected with a power grid. The electrochemical energy storage device performs real-time adjustment or periodical adjustment on electric energy input to the power grid by the wind driven generator according to power output characteristics of the wind driven generator. The offshore wind power floating foundation has the characteristics of simple structure, good stability, good adaptability and capability of effectively reducing or eliminating the impact of overlarge fluctuation of the existing offshore wind power on a power grid.
Owner:CHINA THREE GORGES CORPORATION
Pressure relief building board using modified expanded and vitrified beads and installation structure thereof
InactiveCN107963840ASolve processing problemsAdapt to engineering needsRoof covering using slabs/sheetsThermal insulationBasalt fiber
The invention discloses a pressure relief building board using modified expanded and vitrified beads and an installation structure thereof. The pressure relief building board includes a board body, the board body consists of a board skeleton, modified expanded and vitrified beads, basalt fiber, and a plate skeleton, and a cementing material coating the board skeleton and the components, and the cementing material is added with a high quality compound, low-alkali and low hydration heat permeation resistant agent, thus solving the problems of easy aging and deformation, high maintenance cost, difficult breakage, sharp fragment and large impact energy after breakage, and lack of processing and cutting ability according to the actual needs of project sites in existing pressure relief boards. The invention provides the novel pressure relief board with the advantages of light weight, pressure relief, no toxicity or harm, fire prevention, durability, friableness, thermal insulation, sound insulation, waterproofness and the like and certain bearing capacity.
Owner:SOUTHWEAT UNIV OF SCI & TECH
High efficiency heat dissipation power amplifier manufacturing method and heat dissipation cabinet
InactiveCN108882645AGood grounding effectIncrease powerCasings/cabinets/drawers detailsPrinted circuit board receptaclesHeat flowAudio power amplifier
The invention provides a high efficiency heat dissipation power amplifier manufacturing method and a heat dissipation cabinet, which belongs to the technical field of microwave power amplifier. The common partition wall, the side walls of the cabinet, and all the fins are welded together to form an integrated heat dissipation cabinet for the power amplifier, and the MMIC bare chip of the power amplifier is directly sintered to the common partition wall of the heat dissipation cabinet. According to the high efficiency heat dissipation power amplifier manufacturing method and the heat dissipation cabinet, the method can effectively reduce the temperature gradient of the power amplifier and the grounding resistance of a power amplifier chip, improve the reliability of the power amplifier, andis suitable for solving the heat dissipation problems of the power amplifier with small volume, light weight, and high heat flux density as an important improvement to the prior art.
Owner:NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
Method for determining dynamic coefficient of cast-in-place pile frame type roadbed structure
The invention provides a method for determining the dynamic coefficient of a cast-in-place pile frame type roadbed structure. The method has the advantages that the dynamic coefficient of the cast-in-place pile frame type roadbed structure can be scientifically and reasonably determined, and the requirement of the engineering design and construction can be met. The method comprises the following steps of (1) determining the thickness h of a filling body, and determining the span L of a trough type bridge plate in the longitudinal direction; and (2) and determining the dynamic coefficient of the cast-in-place pile frame type roadbed structure through the following formula shown in the description. The formula is shown in the description.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
A screening slag loading building
ActiveCN103977959BSimple structureNovel and reasonable designSievingScreeningSlagConstruction aggregate
Owner:SINOHYRDO ENG BUREAU 3 CO LTD
An inertial capacity device with adjustable inertial capacity
The invention discloses an inertial capacity device with adjustable inertial capacity. The inertial capacity device comprises a flywheel, wherein the flywheel is connected with a driving device through a first rotating shaft; the driving device is fixedly arranged on the inner side of a box body; a main pipe and side pipes which are perpendicular to each other and are communicated are arranged onone side, different from the first rotating shaft, of the flywheel; the main pipe is coaxial with the first rotating shaft and is internally provided with a main pipe piston; the main pipe piston is connected with a push-pull rod through a ball bearing; each side pipe is internally provided with a side pipe piston; protrusions are arranged at two ends of a short tube of each side pipe; an area enclosed by the main pipe piston, the main pipe, the side pipe pistons and the side pipes is filled with liquid; the liquid moves when only pushing the main pipe piston to move. The inertial capacity disclosed by the invention can be actively and continuously changed and can adapt to project demands under different conditions; the integral device is small in size and is more convenient in actual installation.
Owner:HOHAI UNIV
Screening slag loading building
ActiveCN103977959ASimple structureNovel and reasonable designSievingScreeningSlagConstruction aggregate
The invention discloses a screening slag loading building, comprising a vibration vibrating screen, an aggregate box, a slag collecting box, a first slag separator and a second slag separator; the aggregate outlet of the vibration vibrating screen is connected with the aggregate box; a waste slag outlet of the vibration vibrating screen is connected with the charging port of the first slag separator; the first slag separator comprises a first slag separation drum connected with the slag collecting box and a second slag separation drum connected with the charging port of the second slag separator; the second slag separator comprises a third slag separation drum and a fourth slag separation drum which are used for loading materials to a transfer vehicle; a switching device for controlling the flow direction of waste slag is arranged in each of the first slag separator and the second slag separator. The screening slag loading building effectively realizes the seamless jointing for transferring the waste slag and aggregate, so the transferring efficiency of the waste slag and the aggregate is improved, and the aggregate in the slag material can be used and taken on site and used as the sand aggregate for lining a channel.
Owner:中国水利水电第三工程局有限公司
Fiber Bragg grating pressure sensor capable of monitoring positive and negative pressure and testing method
InactiveCN103900756BIncrease capacityAvoid personal dangerFluid pressure measurement by optical meansFiberGrating
The invention discloses a fiber bragg grating pressure sensor capable of achieving positive and negative pressure monitoring and a testing method. The fiber bragg grating pressure sensor comprises a connector, a filter screen, a base, an outer shell, a corrugate pipe, a first fiber bragg grating, a second fiber bragg grating, an optical fiber, an optical cable connector, an armored optical cable, a brace, a flange plate, an outer shell cover and a strain beam, wherein the outer shell cover is used for protecting the optical fiber from a sealing glue sealing part to an optical cable connector part, and the strain beam is used for applying prestress. The fiber bragg grating pressure sensor capable of achieving the positive and negative pressure monitoring and the testing method are suitable for the monitoring of pressure safety of oil and gas pipelines, urban underground gas pipelines, heating power pipelines, water supplying pipelines, oil tank pipelines, oil conveying pipelines and other pipe networks, the potential safety hazards that an electronic sensor is electrified and is unsafe in nature are eliminated, and meanwhile the capacity of phases is also improved greatly; the fiber bragg grating pressure sensor is applied to the aspect of real-time online monitoring of coal and rock mass gas pressure, errors caused by single data monitoring are avoided, the sensitivity and the accuracy of the system are improved, manpower, material resources and time are saved, and meanwhile the danger probably brought by personnel on site can be avoided.
Owner:SHANDONG MICRO PHOTOGRAPHIC ELECTRONICS +1
Data processing method based on self-moving rail transit mobile 3D scanning system
ActiveCN111547084BImprove collection efficiencyImprove detection efficiencyImage enhancementImage analysisData acquisitionMulti source data
The invention discloses a data processing method based on a self-moving three-dimensional scanning system for rail transit, which includes the following steps: (1) data collection for rail transit: using a self-moving three-dimensional scanning system for rail transit to collect data along the track traffic infrastructure and surrounding environment data to obtain laser data, track profile data, inclination data and mileage data, and transmit the laser data, track profile data, inclination data and mileage data to the host computer; (2) multi-source data pre-processing Processing: the host computer receives the laser data, track profile data, inclination data and mileage data of step (1), and performs multi-source data fusion processing on the multi-source data to generate a three-dimensional point cloud along the measured rail transit and Gray-scale image. The upper computer is used as the core to control the processor to realize one-time data collection and generate a three-dimensional point cloud gray-scale image by fusion of multi-source data. Compared with the traditional measurement method, the data collection efficiency is improved and the security risk of online is reduced. .
Owner:CHINA RAILWAY DESIGN GRP CO LTD
An assembled walkable channel
ActiveCN106192940BAdapt to engineering needsIncrease arable areaConstructionsIrrigation ditchesWater channelAgricultural engineering
The invention discloses an assembly type walkable channel. The assembly type walkable channel is composed of a channel body composed of a plurality of walking cover plates and a plurality of main channel bodies with the open top ends. A water way is arranged on the inner sides of the main channel bodies. A plurality of sets of hollow strengthening ribs and combination solid ribs surround the outer walls of the main channel bodies at intervals. Buckling grooves are formed in the connecting positions of the end portions of the hollow strengthening ribs and the tops of the main channel bodies. Lap joint platforms corresponding to the buckling grooves are arranged on the two sides of the bottom of each walking cover plate. The multiple main channel bodies are connected through connecting parts at the two ends of the main channel bodies in an end-to-end manner. The multiple walking cover plates are buckled on the channel body. The assembly type walkable channel is low in manufacturing cost, dredging is convenient, the area of the occupied cultivated land of the channel body can be effectively reduced, and the cultivated area of the farmland is increased accordingly.
Owner:长春市锐达筑路材料有限公司
A Calculation Method for Debris Flow Scouring Bridge Piers
ActiveCN108009363BDetermine the degree of washoutComputational ConsiderationsGeometric CADDesign optimisation/simulationGraphicsImaging processing
The invention discloses a calculation method for debris flow scouring bridge piers, including establishing an erosion rate formula for debris flow scouring bridges: assuming that debris flow is a uniform mixture and in an incompressible state during movement, an empirical parameter ξ is introduced to obtain a revised erosion rate Formula; Numerical calculation is completed according to the physical parameters of the working conditions determined by the debris flow scouring the bridge: the revised erosion rate calculation formula is converted into vector form and discretized in time and space, the physical parameters of the debris flow are determined and assigned, and the finite volume method is used Solve the flux Riemann problem; solve the above discrete equations and calculation formats in the x and y directions, and judge the erosion conditions according to the revised erosion rate formula, thereby completing a calculation cycle; visualize the results to obtain the erosion information : Using computer graphics and image processing technology, the calculation data is converted into graphics or image output, and the conclusion of debris flow scouring bridge piers is obtained.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
A Fiber Bragg Grating Displacement Sensor Capable of Multipoint Measurement
ActiveCN103759659BSensitivity adjustableAchieve regulationUsing optical meansFiberFiber Bragg grating
The invention discloses a fiber bragg grating displacement sensor capable of conducting multi-point measurement. The fiber bragg grating displacement sensor comprises a sensor outer shell and an anchor jaw structure. Two symmetrically-arranged supports are arranged in the sensor outer shell, the outer sides of the supports are respectively provided with a pressing guide column, the inner sides of the supports are provided with pressing springs respectively, the supports are further provided with precision guide rails and precision sliding rails, the precision guide rails are in clearance fit with the precision sliding rails, a spring pulling rod is further arranged below the supports, and extension springs are fixed on the upper portions of the precision guide rails and the upper portion of the spring pulling rod and used for tensioning the precision sliding rails to enable the precision sliding rails to perform reciprocated sliding in the precision guide rails. According to the actual use requirement, the flexibility and the measuring range of the sensor can be selected, the slope heights of the precision guide rails can be changed to adjust the flexibility of the sensor, and the slope lengths of the precision guide rails can be changed to adjust the measuring range.
Owner:SHANDONG MICRO PHOTOGRAPHIC ELECTRONICS
Construction technology of prestressed oblique beam with variable cross-section
Owner:ZHEJIANG YIJIAN CONSTR GROUP
Offshore wind power floating foundation integrated with electromagnetic energy storage system
PendingCN112606963AMaintain temperatureMaintain humidityWind energy with garvitational potential energyWind motor supports/mountsWind drivenMarine engineering
An offshore wind power floating foundation integrated with an electromagnetic energy storage system comprises a floating supporting platform, a gravity type anchoring structure and the electromagnetic energy storage system, the lower portion of the floating supporting platform is connected to the gravity type anchoring structure through a mooring cable, and a wind driven generator is located on the upper portion of the floating supporting platform and connected with the floating supporting platform. The electromagnetic energy storage system is located in the gravity type anchoring structure and connected with the wind driven generator through a cable, and the submarine cable is connected with the electromagnetic energy storage system and led out of the gravity type anchoring structure to be connected with a power grid. And the electromagnetic energy storage system performs real-time adjustment or periodical adjustment on the electric energy input to the power grid by the wind driven generator according to the power output characteristics of the wind driven generator. The offshore wind power floating foundation has the characteristics of simple structure, good stability, good adaptability and capability of effectively reducing or eliminating the impact of overlarge fluctuation of the existing offshore wind power on a power grid.
Owner:CHINA THREE GORGES CORPORATION
Measuring method of internal flow velocity and impact force spatial distribution of viscous debris flow
ActiveCN106446411BHigh precisionClear thinkingGeometric CADHuman health protectionDebris flowMechanics
Aiming at solving the problems that flow velocity and impact of any point in any section of mud-flow cannot be measured in the prior art, the invention first provides a method for measuring viscous mud-flow internal flow velocity and impact force spatial distributions. The method for measuring flow velocity is based on the viscous mud-flow body Bingham model and the scour-and-fill balance principle; first, setting any section I-I, determining values such as h0, h(x), xa, xd, xb, xc of the section through the trial method; then calculating the flow depth of a mud-flow calculation infinitesimal surface at any point on the section according to formula 1; and finally substituting h into the Bingham-model-based viscous mud-flow flow velocity distribution formula to obtain flow velocity of the point. By means of the method for measuring flow velocity at any position in any section of mud-flow, the method for measuring spatial distribution of viscous mud-flow impact force is further obtained. The calculation result of the method has high accuracy, which can be applied in real design for viscous mud-flow prevention and control engineering. The measurement method is clear in thinking and simple in calculating, which is an improvement of the present prevention and control engineering design method which is based on uniform distribution.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
A configuration optimization method for a dual planetary row power-split hybrid power system
ActiveCN112319460BFull range of configurationsAdapt to engineering needsHybrid vehiclesConfiguration optimizationHybrid system
The invention relates to a configuration optimization method for a dual-planetary row power-split hybrid power system, comprising the following steps: generating a configuration library according to clutch constraints and possible connection relationships between components; removing configurations that do not meet the configuration constraints type, establish a general energy management strategy for each configuration; obtain a preliminary optimized configuration library based on the beetle's whisker search algorithm; establish a candidate solution set screening module; obtain each preliminary optimized configuration based on the particle swarm optimization algorithm and the candidate solution set screening module Optimizing the configuration; screening the modules based on the candidate scheme set to obtain the optimal configuration. Compared with the prior art, the present invention fully optimizes the design of all feasible configurations of the double planetary row, and can adapt to the engineering requirements of different user design goals; The comprehensive performance evaluation index is used as the optimization objective function, combined with the particle swarm optimization algorithm to realize the rapid optimization of the best scheme of the configuration comprehensive performance.
Owner:TONGJI UNIV
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