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1534 results about "Confined space" patented technology

A confined space is a space with limited entry and egress and not suitable for human inhabitants. An example is the interior of a storage tank, occasionally entered by maintenance workers but not intended for human occupancy. Hazards in a confined space often include harmful dust or gases, asphyxiation, submersion in liquids or free-flowing granular solids (for example, grain bins), electrocution, or entrapment.

Automatic anchor protection platform having combined support of anchor rods and anchor cables

The present invention belongs to the technical field of anchor protection apparatuses. Provided is an automatic anchor protection platform having combined support of anchor rods and anchor cables. The automatic anchor protection platform comprises a movable chassis, a multi-cycle anchor rod drilling rig, an anchor rod drilling rig posture positioning control device, an anchor cable support device, a temporary support device, an electrical system and a hydraulic system. Said automatic anchor protection platform integrates the multi-circle anchor rod drilling rig, the anchor cable support device and the temporary support device, and therefore meets the anchoring and support requirements of roadways under different geological conditions, allows anchor rod and anchor cable parallel support operations to be conducted at the same time, and achieves efficient coordinating matching linkage integrated design, thus further promoting efficient operation processes in limited spaces such as coal mines and tunnels.
Owner:TAIYUAN INST OF CHINA COAL TECH & ENG GROUP +1

Intelligent induction and early warning system for poisonous gas in limited space

The invention discloses an intelligent induction and early warning system for poisonous gas in a limited space, and relates to the technical field of gas induction and early warning. A three-dimensional structure model of the limited space is constructed, and non-uniform grid division is carried out based on barrier characteristics; multiple types of toxic gas sensing units are arranged in the grids, and gas concentration data are collected in real time; constructing a toxic gas three-dimensional cloud picture, and generating a dynamic weight field based on the concentration gradient; fusing operator positioning and trajectory prediction information, and establishing an individual risk exposure model; calculating a space-time intersection of the toxic gas cloud picture and the high-risk track area to form a fusion risk matrix; realizing linkage early warning control of a region level and an individual level through multi-level dynamic threshold judgment and thermal block clustering identification; the system can realize accurate perception and active response of the toxic gas gathering trend and personnel exposure risk in the complex limited space, has the technical advantages of high sensitivity, high intelligence and low false alarm, and is suitable for various limited space scenes such as chemical engineering, tunnels and mines.
Owner:CHINA ACAD OF SAFETY SCI & TECH

Self-adaptive gait control method, system and equipment for quadruped robot in limited space and medium

The invention discloses a self-adaptive gait control method, system and device for a quadruped robot in a limited space and a medium, and belongs to the technical field of gait control. Identifying terrain categories through a classifier and acquiring initial gait parameters from a gait library; adjusting the gait parameters according to the terrain gradient and the roughness to obtain optimized gait parameters; calculating stability indexes and fusing scores; when the score is lower than a threshold value, an adjustment strategy is determined according to an instability mode to correct gait parameters; a foot end track is generated and control is executed; and the executed information is fed back to terrain perception to form a closed loop. According to the method, the terrain recognition accuracy is improved through multi-modal information fusion, the adaptive mapping from the terrain to the gait is established to achieve automatic gait switching and parameter optimization, the stability is evaluated through multi-index fusion, a targeted adjustment strategy is selected according to an instability mode, the adaptive gait control problem under the limited space and the complex terrain is solved, and the adaptive gait recognition accuracy is improved. And the movement efficiency and the stability are improved.
Owner:GUIZHOU POWER GRID CO LTD

PINN-based method and system for predicting explosion damage parameters in confined space

The invention discloses a PINN-based limited space internal explosion damage parameter prediction method and system. The method comprises the steps of completing data acquisition and constructing a time sequence data set; model construction is completed, and the time sequence modeling capability is enhanced; determining a total loss function and adding boundary condition constraints to enable model prediction to accord with physical laws; firstly optimizing data loss, then introducing a physical residual error, and finally activating a boundary speed suppression loss item and adjusting a learning rate; in combination with a learning rate dynamic scheduling and early stop mechanism, the training efficiency and stability are improved through adaptive residual weighted balance data and physical constraint loss; and predicting parameters such as pressure, temperature and speed of each point in the limited space in multiple time frames by using the trained model, calculating impulse based on a pressure time history, evaluating personnel damage, and completing damage zoning in the limited space. And efficient modeling under a complex boundary condition and a limited space environment is completed.
Owner:NANJING UNIV OF SCI & TECH

Narrow space spraying track planning method based on reinforcement learning

The invention discloses a narrow space spraying trajectory planning method based on reinforcement learning, and the method comprises the steps: obtaining environment data through a LiDAR camera and a TOF camera, and obtaining a LiDAR point cloud and a TOF point cloud; carrying out registration fusion on the LiDAR point cloud and the TOF point cloud, and carrying out normal vector unification processing on each point of the fused point cloud; reconstructing by introducing a Poisson equation improved by shielding perception weight, and eliminating noise through Laplacian smoothing processing to obtain a target point cloud set; designing a state space, an action space and a reward function of reinforcement learning according to the planning of the spraying path trajectory, and determining a spraying path trajectory planning strategy; and based on the target point cloud set, adopting a spraying path trajectory planning strategy to carry out spraying trajectory planning. Sensor data fusion is realized through an improved iterative nearest point algorithm, and a shielding area is repaired in cooperation with a Poisson reconstruction algorithm, so that accurate correspondence between input parameters and output film thickness can be realized, and the control precision of the spraying thickness is remarkably improved.
Owner:JIANGSU UNIV OF SCI & TECH

Shielding space operation communication gateway system based on PLC and 5G multimode fusion

The invention discloses a shielding space operation communication gateway system based on PLC and 5G multimode fusion, and relates to the technical field of communication gateways, through integrating a task intention recognition module, a link semantic modeling module, an intelligent strategy regulation and control unit, a cross-link redundancy coding and decoding module, a link abnormal game detection module and a cognitive evolution management module; modeling is carried out through task-driven communication service requirements, semantic abstraction is carried out on a link state in combination with a graph neural network, a system constructs a double-input reinforcement learning model, and joint scheduling of link selection, coding configuration and energy consumption control is realized; meanwhile, the abnormal behavior of the link is judged through an adversarial sample recognition and game mechanism, and a main strategy structure is optimized based on a multi-strategy scoring and inheritance mechanism; the system has the capabilities of intelligent decision making of communication strategies, anomaly defense and self-evolution optimization, and is particularly suitable for high-reliability operation communication requirements in a limited space in wireless communication shielding environments such as a hearth, an air pre-heater, an absorption tower, a tunnel, a mine and a subway.
Owner:GUODIAN SHUANGWEI INNER MONGOLIA SHANGHAI TEMPLE ENERGY CO

Constricted space intelligent gangue selection robot heterogeneous sensor fusion detection method

The invention relates to a fusion detection method for heterogeneous sensors of an intelligent gangue selection robot in a limited space, and belongs to the field of fusion of technical heterogeneous sensors. VOC time sequence signals of a bionic electronic nose array, laser radar cloud data and pose information of an inertial measurement unit are synchronously collected, and the VOC time sequence signals are denoised through a generative adversarial network model; voxel filtering and outlier elimination are carried out on the laser radar cloud data; the VOC concentration gradient is predicted based on CFD simulation, a three-dimensional environment map is constructed in combination with laser radar cloud data and inertial measurement unit poses, and a smell concentration thermodynamic diagram is marked; and extracting robust odor fingerprints from the denoised VOC time sequence signals, aligning feature distribution of different mining areas, and updating the classification model. According to the scheme, the gangue selection robot is guided to preferentially explore a hidden area with low VOC concentration and high CO2 accumulation through the odor concentration gradient, and the detection capacity of non-dominant gangue piles is remarkably improved.
Owner:CHINA PINGMEI SHENMA ENERGY & CHEM GRP CO LTD +3

Under-actuated active and passive cooperative control device for continuum robot

ActiveCN120941346AProgramme-controlled manipulatorIndependent motionRobotic arm
The invention relates to the technical field of continuum robot control, in particular to an under-actuated active and passive cooperative control device for a continuum robot. The two sections of mechanical arms are connected in a staggered mode to form two sections of continuous mechanical arms moving independently, each mechanical arm is provided with a plurality of bending units which are sequentially connected in the same position, the pre-tightening compensation mechanism is installed on the core body in the circumferential direction, the under-actuated control mechanism is installed on the installation disc, and the first rope is connected with the mechanical arms and the rope fixing plate; one end of the second rope is connected with the mechanical arm, and the other end of the second rope sequentially penetrates through the mechanical arm, the pre-tightening compensation mechanism and the first positioning wheel assembly and then is connected with the rope fixing plate to form a tension compensation loop for the first rope. The two-section continuum structural design is adopted, kinematics dimension reduction is achieved, and the multi-direction bending capacity can be achieved in a narrow space through bionic optimization. A combined type pre-tightening mechanism with a spring and a pulley combined is adopted, rope deformation is passively compensated through an elastic element, and dynamic tension maintaining is achieved.
Owner:SHANGHAI CHANGYU HIGH-TECH DEVELOPMENT CO LTD

Airplane sliding door pressure relief test device

The utility model discloses an aircraft sliding door pressure relief test device, which comprises a clamping mechanism and an actuator, the clamping mechanism comprises a vertically arranged rectangular frame, a sliding door is vertically arranged in the rectangular frame, and an upper frame and a lower frame of the rectangular frame are respectively fixed on the upper side and the lower side of a framework of the sliding door. The left frame and the right frame of the rectangular frame do not make contact with the left side and the right side of the framework of the sliding door, the transmission end of the actuator acts on the pressure relief opening cover on one side on the plane in the heading direction of the sliding door to form a loading point, and the actuator loads and applies force to test whether the pressure relief opening cover is separated from the pressure relief lock at the opening value and is normally opened relative to the framework. On the basis of analysis of structural forms and pressure relief loads of the pressure relief opening cover and the pressure relief lock of the aircraft sliding door, the open test device is provided, a confined space pressing test is not needed, the actuator directly acts on the pressure relief opening cover of the sliding door to load and apply force, the test device can be repeatedly used, the test implementation process is easy to operate, and the test efficiency is improved. Test results are accurate, and test cost can be reduced.
Owner:JIANGSU MEILONG AVIATION COMPONENTS

Online detection method and system based on dust concentration in limited space

The invention relates to the technical field of dust concentration detection, in particular to an online detection method and system based on limited space dust concentration, and the method comprises the following steps: based on each detection area, analyzing scattered light signals, classifying the scattered light signals into different particle size categories according to angles and coordinates, and performing signal compensation in combination with real-time humidity; adjusting the irradiation direction of the LED array to optimize illumination distribution, comparing light intensity differences, dynamically scheduling uniform illumination areas, subdividing detection points, analyzing layering signals, and obtaining particle size layering concentration data. According to the invention, distribution mapping with distinct particle size category difference is realized by using a spatial multi-dimensional layered structure, signal adaptability is improved by fusing a humidity dynamic response mechanism, particle size, humidity and illumination multi-source data are dynamically fused, local environment interference is eliminated through layering and compensation linkage, and the accuracy of the system is improved. The continuity of data expression and the response speed of concentration monitoring are improved, and continuous dynamic tracking of the dust state in a limited space complex environment is supported.
Owner:SICHUAN ZHUCHUANG SAFETY TECH CO LTD

Engineering mechanical and electrical installation method based on BIM

The invention provides a BIM (Building Information Modeling)-based engineering electromechanical installation method. The method comprises the following steps: establishing an engineering electromechanical BIM model; carrying out model collision check and optimization; construction simulation and scheme making are carried out; field installation and implementation; and installation acceptance and model filing. According to the method, the geometric and attribute integrated BIM model is constructed through data collection and digital drawing review, full-dimensional collision detection is carried out, key pipeline specification requirements are preferably guaranteed, model data reliability is guaranteed, construction disjunction caused by drawing errors is avoided, the problem of pipeline collision is solved in advance, and the construction efficiency is improved. Material waste and construction period delay of dismantling and reassembling in the construction stage are reduced, meanwhile, the risk of illegal acceptance of key pipelines is reduced, and the limited space utilization rate is increased.
Owner:GUANGDONG KUANYU CONSTRUCTION ENGINEERING CO LTD

Mobility device

A powered balancing mobility device that can provide the user the ability to safely navigate expected environments of daily living including the ability to maneuver in confined spaces and to climb curbs, stairs, and other obstacles, and to travel safely and comfortably in vehicles. The mobility device can provide elevated, balanced travel.
Owner:DEKA PRODUCTS LP

Limited space operation safety and environment multi-parameter monitoring system for thermal power plant

The invention discloses a thermal power plant limited space operation safety and environment multi-parameter monitoring system, and relates to the technical field of operation safety monitoring. A structure parameter model is constructed based on a space volume structure, a gas exchange path, a risk type and an operation position, and multi-parameter sensing nodes are configured; extracting abnormal fluctuation characteristics of the environmental parameters through edge computing nodes; a gas flow model and a heat distribution model are combined to carry out space-time inversion, a risk source is positioned, a space risk heat map is dynamically generated, the position and action state of an operator can be obtained in real time, the exposure probability is calculated, and automatic identification and graded early warning of a high-risk area are realized; the system has high-precision, low-delay and full-coverage monitoring capability, and the intrinsic safety of limited space operation of the thermal power plant is improved.
Owner:SBAIDA INTERNET OF THINGS TECH (BEIJING) CO LTD

Limited space gas monitoring and emergency response method and system based on multi-modal sensing and intelligent decision, and storage medium

The invention discloses a limited space gas monitoring and emergency response method and system based on multi-modal sensing and intelligent decision, and a storage medium, and aims to solve the problems of one-sided monitoring, low recognition precision and the like in the prior art. The method comprises the steps of system initialization and parameter configuration, multi-modal data real-time acquisition and transmission, fusion analysis and risk identification, leakage source positioning and concentration field modeling, multi-stage dynamic emergency response, emergency process adjustment interaction and system self-learning optimization. The system comprises a multi-mode sensing assembly, an intelligent decision-making module and the like, and can integrate a personnel positioning system and an access control system. According to the method, the risk identification precision is improved through multi-source data fusion, the response pertinence is enhanced through a dynamic emergency strategy, the adaptability is guaranteed through a self-learning and linkage mechanism, and comprehensive safety guarantee is provided for limited space operation.
Owner:QUJING BUREAU OF SUPERVOLTAGE POWER TRANSMISSION CHINA SOUTHERN POWER GRID

Simulation method for concrete bridge widening structure in limited space

The invention provides an analog simulation method for a concrete bridge widening structure in a limited space, and belongs to the technical field of analog simulation, and the method comprises the steps: constructing a multi-scale-multi-constraint coupling finite element model of a widening structure adaptive to the limited space, defining a multi-dimensional simulation boundary condition driven by the limited space, and constructing a multi-scale-multi-constraint coupling finite element model of the widening structure; and performing staged coupling simulation analysis under a limited space working condition, performing multi-objective optimization iteration on limited space constraint based on a simulation result, and preferentially screening a parameter combination which reaches the mechanical standard and has the minimum space redundancy for practical application of the concrete bridge widening structure. The simulation precision of the bridge widening structure is effectively ensured, the transformation efficiency is improved, and the engineering risk is reduced.
Owner:ANHUI TRAFFIC PLANNING INST ENG INTELLIGENT MAINTENANCE TECH CO LTD +1

Guiding and supporting structure for replacing large components of aircraft

The invention relates to the technical field of aircraft maintenance, and particularly discloses a guide supporting structure for replacing large components of an aircraft. The longitudinal supporting seat can be movably arranged on the vehicle body in the horizontal direction; the linkage operation adjusting mechanism is arranged on the side wall of the longitudinal supporting seat and is used for providing two independent transmission powers with variable speeds for the longitudinal supporting seat; the lifting mechanism can be movably arranged on the longitudinal supporting seat in a sleeving mode in a lifting mode, the lifting mechanism is further provided with a rotatable retainer, the retainer is used for fixing an aircraft landing gear in a disassembly and assembly state, and lifting power of the lifting mechanism and rotating power of the retainer both come from the longitudinal supporting seat. According to the invention, multi-degree-of-freedom adjustment in a limited space is realized, and meanwhile, a guide supporting structure with high positioning precision and operation convenience is taken into account, so that the safety and efficiency of replacement operation of large components of an aircraft are improved.
Owner:CHENGDU YUHENG TECH CO LTD

Double-robot automatic calibration method based on self-adaptive point location planning in limited space

The invention relates to a double-robot automatic calibration method based on self-adaptive point location planning in a restricted space, and belongs to the technical field of double-robot calibration, and the method comprises the steps: building a three-dimensional simulation model of a double-robot operation space on an Rviz platform based on an ROS architecture; a collision detection module is used for randomly generating a calibration point composed of collision-free double-robot joint angle vectors; when the robot is driven to move, data of the motion capture camera and positive kinematics Cartesian coordinates of the double robots are synchronously collected, a calibration result is obtained through optimization of a least square method by adopting a hand-eye calibration algorithm, and the effectiveness of the calibration result is judged through the average value of data calibration precision until calibration of the double robots is completed. Simulation modeling, collision detection and a hand-eye calibration technology are fused, a complex calibration problem is converted into a virtual environment parameter optimization process through a self-adaptive sampling strategy and a data synchronous acquisition mechanism, calibration robustness and precision are remarkably improved, and guarantee is provided for high-precision cooperative control of double robots.
Owner:NANKAI UNIV

Limited space operation early warning method, system, equipment and medium

The invention discloses a limited space operation early warning method, system, equipment and medium, and the method comprises the steps: obtaining real-time monitoring data of an operation environment of a target limited space, inputting the real-time monitoring data into a pre-trained multi-source data fusion network model, obtaining data features corresponding to the real-time monitoring data, and carrying out the early warning of the operation environment of the target limited space; inputting the data features into a pre-trained risk assessment model, generating an operation risk level of the target limited space, judging whether the current operation environment is in a dangerous state or not according to the operation risk level, and if the current operation environment is judged to be in the dangerous state, identifying the risk source of the target limited space through a Bayesian network-based dangerous source identification model. According to real-time monitoring data, a hazard source is identified, the hazard source and data features are input into an early warning value generation model based on deep reinforcement learning, an early warning value is generated, an early warning strategy for a target limited space is determined according to the early warning value and the hazard source, and the flexibility of limited space operation early warning is improved.
Owner:ZHONGSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID

Steering head for pipe ramming / hammer boring installations

A steering head for a pipe ramming hammer bore construction system, configured to allows passage of soil through the center of the steering head while maintaining the ability to change the bore alignment through the use of inflatable bags which are underlying and adjacent to a portion of a shell member which extends radially outward from the steering head upon inflation of the inflatable bag. The inflatable bags may be inflated by inflation media supply lines which extend from the bore pit to the steering head and deflated by release of the inflation media. The media flow to the inflatable bags may be controlled by media valves which may be located in the steering head or, alternatively, at a different location, such as in the bore pit. The remote nature of the system eliminates the need for frequent removal of the pneumatic hammer, confined space entry, and manual corrections performed inside the casing.
Owner:PLG TECH INC

Manhole cover plate fence linkage protection device and method with safety monitoring function

The invention discloses a manhole cover plate fence linkage protection device and method with a safety monitoring function, and belongs to the technical field of limited space operation safety protection. Comprising a device basic component, a fence, a locking mechanism, a linkage mechanism, a cover plate and a monitoring system. The device foundation component is mounted on the inner wall of the orifice; the fence is arranged in the device basic component and can ascend and descend. The fence is composed of a fan blade fence and a fence door. The locking mechanism is installed on the device foundation component and the fence and used for effectively locking the fence under the full-open-position isolation working condition. The linkage mechanism is connected with the fence and the cover plate. The monitoring system comprises a fence position detection device and a detector. Linkage of a manhole opening protection facility and safety monitoring is achieved, and the safety of limited space operation is effectively improved.
Owner:CHINA YANGTZE POWER

Vehicle-mounted microwave oven smell and VOC release detection and evaluation method and system based on vehicle-mounted high-temperature closed environment simulation

The invention discloses a vehicle-mounted microwave oven smell and VOC release detection and evaluation method and system based on vehicle-mounted high-temperature closed environment simulation. The method comprises the steps that a microwave oven to be detected is placed in a closed test cavity and sealed; the cavity is placed in a heating device to be heated to the preset high temperature and kept for the set time; the VOC sensor is used for monitoring the VOC concentration in the cavity in real time; collecting a gas sample through the sampling interface at the last test stage; performing standard sensory evaluation on the sample by an evaluator; carrying out comprehensive grade evaluation by combining the VOC concentration data and the smell grade score; according to the invention, the special closed cavity is arranged in the oven with accurate temperature control, high-temperature stress is directly and uniformly applied, and the released VOCs are ensured to be gathered in a limited space by utilizing the sealing property of the cavity, so that the VOCs are released in an accelerated manner under the most sensitive temperature and humidity condition of the material of the microwave oven to be detected, and the detection accuracy of the microwave oven to be detected is improved. The obtained release level and odor characteristics are highly related to the experience of the user in the actual vehicle-mounted scene.
Owner:VKAN CERTIFICATION & TESTING +1

A type of omnidirectional mobile forklift

This invention discloses a omnidirectional forklift in the field of forklift technology, including a forklift body and a forklift beam. A lifting groove is formed on the inner side of the upright of the forklift beam, and a lifting rack is installed at the bottom of the groove. A forklift lifting power box is disposed between the two lifting racks. The forklift of this invention features a telescopic forklift design, consisting of a main forklift and a telescopic forklift. An electric telescopic rod is installed in the internal cavity of the main forklift, which can drive the telescopic forklift to extend and retract within the forklift mounting groove. In narrow spaces where the forklift body cannot enter, the forklift structure can be extended to access narrow passages for retrieving goods, effectively expanding the forklift's usability. Simultaneously, a lifting device mounting groove is formed on the bottom surface of the forklift, and a steering wheel lifting device is installed within the mounting groove, enabling the forklift to turn on the spot, facilitating movement and exiting in confined spaces.
Owner:SHANGHAI JOYWIN INTELLIGENT TECH CO LTD

Modularized assembly type hydraulic jacking portal crane

The invention discloses a modular assembly type hydraulic jacking portal crane which comprises a rail device, a hydraulic jacking device and a hydraulic jacking device. The number of the walking devices is two, the walking devices are movably arranged on the left track and the right track respectively, each walking device comprises a power unit and a walking vehicle, and the power units are connected to the walking vehicles in a replaceable mode and used for driving the walking vehicles to move along the track devices; the supporting device is detachably arranged on the walking vehicle; the cross beam is detachably arranged on the supporting device; wherein the rail device, the walking device, the supporting device and the cross beam are all of modular structures and can be adaptively adjusted and assembled according to needs, and the driving friction force of the power unit relative to the rail device can be adjusted. The crane can efficiently and conveniently complete manual installation, hoisting operation and disassembly transition in a high-floor room and other scenes with limited space, the driving friction force can be accurately and efficiently adjusted, and efficient and safe load hoisting can be achieved.
Owner:TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Limited space-based operation risk early warning method and system, medium and product

The invention discloses an operation risk early warning method and system based on a limited space, a medium and a product, and relates to the field of risk analysis. The method comprises the following steps: firstly, acquiring operation state parameters of operation equipment, and automatically identifying current operation stages with different inherent risk attributes according to statistical characteristics of the operation state parameters; then, calling a preset monitoring strategy matched with the operation stage; then, acquiring current and historical environment monitoring data according to the monitoring strategy, and calculating change trend characteristics of the current and historical environment monitoring data; and finally, performing comprehensive risk judgment by integrating the current monitoring data, the change trend characteristics and the identified operation stage to obtain a current risk state, and sending early warning information when the risk state is early warning or dangerous. According to the method, the operation stage is automatically identified, and the monitoring strategy and the risk model are dynamically adjusted, so that intelligent and prospective early warning of the limited space operation risk is realized, and the effectiveness and the accuracy of safety management are improved.
Owner:BEIJING SHENGXINNUO TECH CO LTD

Bridge crane operation attitude control method and control system

The invention relates to a bridge crane operation attitude control method and a control system, which are used for accurately hoisting a heavy object in a narrow space, and the method comprises the following steps: obtaining operation area space constraint information to generate a space map, and determining a hoisting path and a path width; planning a driving track of the driving mechanism along the central line of the path, marking direction switching nodes, and calculating the walking distance of each straight line segment; determining an allowable maximum swing range according to the width of the lower-section path; a speed control scheme is formulated according to the walking distance and the swing space, and it is ensured that weight swing does not exceed the limit during direction switching. By actively planning the swing space and intelligently adjusting the motion parameters, the hoisting efficiency is remarkably improved while the safety is guaranteed.
Owner:EUROCRANE (CHINA) CO LTD

Limited space gas detection system and method based on unmanned aerial vehicle and hybrid model

The invention discloses a limited space gas detection system and method based on an unmanned aerial vehicle and a hybrid model. The method comprises the following steps: step 1, task preparation and three-dimensional fusion map construction; 2, automatically planning a detection route of the unmanned aerial vehicle in the to-be-detected limited space; 3, the unmanned aerial vehicle flies along the detection route in the to-be-detected limited space planned in the step 2, autonomously flies in the to-be-detected limited space of the building and carries out gas detection operation, and multi-dimensional data are collected; 4, processing data and constructing a three-dimensional gas concentration distribution field; and 5, performing intelligent analysis and emergency response. The invention relates to the technical field of building space gas detection, and can solve the problems that in the prior art, a high-precision model cannot meet real-time early warning, and the model robustness is poor and the prediction uncertainty is high under the data sparse condition.
Owner:SHENZHEN UNIV +2

Method and device for determining gas risk parameters of limited space and electronic equipment

The invention discloses a method and a device for determining gas risk parameters of a limited space and electronic equipment. The method comprises the following steps: acquiring environment data of a limited space; determining a first concentration characteristic corresponding to the target gas according to the gas data; determining a second concentration characteristic corresponding to the target gas according to the gas data, the first concentration characteristic and associated data corresponding to the associated gas; determining a target concentration characteristic corresponding to the target gas according to the temperature data, the humidity data and the second concentration characteristic; and determining a gas risk parameter corresponding to the limited space according to the target concentration characteristic. According to the method and the device, the technical problem that potential gas potential safety hazards in the limited space are difficult to identify in time due to inaccurate determination of the gas risk parameters when the gas risk parameters in the limited space are determined in the prior art is solved.
Owner:STATE GRID BEIJING ELECTRIC POWER CO

Numerical simulation method for oil product evaporation and oil gas concentration distribution prediction in limited space

The invention discloses a numerical simulation method for oil product evaporation and oil gas concentration distribution prediction in a confined space, and belongs to the technical field of oil product evaporation simulation in the confined space, and the method specifically comprises the following steps: constructing an oil product evaporation multiphase flow model of the confined space; the Lee phase change model is improved through a user-defined function UDF, and the difference value between the vapor partial pressure and the saturated vapor pressure is dynamically calculated to trigger the evaporation process; performing CFD simulation on an oil and gas distribution rule in the confined space; performing comparison verification on the CFD simulation result and experimental data; and predicting the time-varying concentration gradient distribution rule of oil and gas in the limited space based on the Lee phase change model. According to the numerical simulation method for oil product evaporation and oil gas concentration distribution prediction in the limited space, the concentration gradient distribution rule of oil gas in the limited space can be accurately predicted, an important reference basis is provided for an oil product leakage emergency disposal strategy, and the prevention and control capacity and the emergency disposal efficiency of oil product leakage accidents can be improved.
Owner:FUZHOU UNIV

Spherical pair locking mechanism and medical instrument

The invention discloses a spherical pair locking mechanism and a medical instrument, and relates to the field of medical instruments. The ball pair locking mechanism comprises a ball joint and a locking assembly. The locking assembly comprises a transmission structure, an elastic piece, a locking gear and a force application driving piece. The rigid meshing locking mode of the locking gear and the meshing tooth edge of the inner ball head replaces traditional friction braking, locking force reduction and looseness caused by long-term use and abrasion can be avoided, the locking reliability is greatly improved, and the minimally invasive surgery positioning precision is guaranteed; a user can directly drive the transmission structure through the force application driving part to achieve switching between locking and unlocking of the ball joint, the mechanism is kept in a preset locking or unlocking state in a non-operation state by adjusting the locking gear and the meshing tooth edge and providing automatic reset force through the elastic part, manual intervention is reduced, and the rapid operation requirement of an operation scene is met. The mechanism is compact in structural layout, can adapt to the limited space of minimally invasive surgical instruments, and meets the requirements for locking strength and miniaturization.
Owner:JINGQIN ZHIZAO (SUZHOU) MEDICAL TECH CO LTD

Floating mechanism for blind plugging connection and liquid cooling blind plugging connection system

The invention provides a floating mechanism for blind plugging connection and a liquid cooling blind plugging connection system. The floating mechanism comprises a mounting fixing seat fixedly connected with a case; the joint mounting seat is used for mounting a blind-plug joint; the floating connecting assembly is connected between the mounting fixing seat and the joint mounting seat and is configured to allow the joint mounting seat to float in a radial plane relative to the mounting fixing seat; the independent guide mechanism is arranged between the mounting fixing seat and the joint mounting seat and is separated from the floating connecting assembly in space; the independent guide mechanism is configured to restrain axial deflection of the connector mounting base when the connector mounting base floats in the radial direction. The blind plug connector is used for solving the problem that an existing blind plug connector cannot meet the dual requirements of compensating macroscopic assembly tolerance and restraining microcosmic angle deflection at the same time in a limited space due to mutual restriction of the floating amount and the deflection control capacity, and consequently plug-in failure is caused.
Owner:HUBEI SILANG WANWEI COMPUTING EQUIPMENT MANUFACTURING CO LTD