168results about How to "Improve evacuation efficiency" patented technology

The invention discloses a group evacuation simulation system and method by combining an artificial bee colony and a social force model. The method comprises the following steps: acquiring an evacuation scene parameter to construct an evacuation scene three-dimensional model; finding all exits of the evacuation scene in the three-dimensional model; dividing to-be-evacuated crow in the evacuation scene into a plurality of groups according to the individual-to-individual relation and the position from the exit, screening the individual closest to the exit position in each group as a leader of each group; using each exit of the evacuation scene as the food source, and the leader as the leader bee in the group, thereby establishing one-to-one mapping with each parameter in the artificial bee colony; under the leading of the leader of each group, executing a parallel artificial bee colony algorithm to dynamically plan a path to move to the exit; and if the leader arriving the corresponding exit, waiting at the exit until the individual is inexistent in each group, and ending the crow evacuation simulation. Through the adoption of the method disclosed by the invention, the simulation efficiency and the channel efficiency in the public place are improved, and the assistance is offered for the real evacuation drill.

The invention provides an indoor evacuation simulating optimization method based on a potential energy driving cellular ant colony algorithm. The method is a personnel evacuation behavior simulating optimization method based on colony intelligence, a two-dimensional cellular automaton mathematic model in accordance with an actual scene is mainly built, personnel evacuation behaviors are simulated by using the cellular ant colony algorithm, and personnel paths are judged and selected according to a potential energy evaluation criterion of an artificial potential energy field, so that the method is more consistent to a true scene evacuation rule, the evacuation efficiency is improved, and a reasonable evacuation scheme is provided.

The invention discloses a prediction method and system for multiple traffic means of a comprehensive passenger traffic hub. The prediction method comprises the first step of predicting the total arriving passenger flow through historical data of passenger flow and a data statistical method, and the second step of predicting the passenger flow sharing proportion of each traffic mean through historical data of passenger flow sharing of the traffic means. According to the prediction method for the multiple traffic means of the comprehensive passenger traffic hub, a mathematical statistical theory and a mathematical modeling method are adopted, a scientific and reasonable passenger flow prediction model is built for the total passenger flow of the hub and the passenger flow sharing proportion of each traffic mean, the problems that as an existing comprehensive passenger traffic hub is large in passenger flow fluctuation, and the passenger flow sharing proportions of the traffic means are unbalanced, the existing hub is low in evacuation efficiency of passenger flow and passengers cannot know the traffic capacity of the traffic means are solved, and the highest evacuation efficiency of the passenger flow of the hub and the overall optimizing of the system are achieved.

The invention discloses a simulation system and method of an evacuation crowd behavior based on grid-density-relation. The system comprises an evacuation scene model building unit, an evacuation scene global path planning unit, a crowd activity generation unit and a crowd simulation unit, wherein the evacuation scene model building unit is used for extracting characteristics of an evacuation scene according to structural information of the evacuation scene to obtain a three-dimensional model of the evacuation scene; the evacuation scene global path planning unit used for performing global path planning on the evacuation scene according to the three-dimensional model of the evacuation scene, and calculating global paths of all entrances in the evacuation scene; the crowd activity generation unit used for performing crowd grouping according to the quantity of all entrances, a relationship between individuals in the crowd and individual location information in the evacuation scene; and the crowd simulation unit used for calculating the real-time speed of individuals in a simulation process according to a social force model, and in the simulation process, correcting the moving speed of each individual in the same group in real time, so as to keep the advancing consistency of each group, and realize behavior simulation of the evacuation crowd.

The invention relates to a method and system for people evacuation simulation under emergencies. The method comprises the steps of obtaining outlet information in an evacuating scene in real time, taking the center of an outlet as the circle center, performing radiation sending of the outlet information within a first range with a visual range as the radius; causing individuals in the first range to completely receive the outlet information; transmitting the complete outlet information to an area outside the first range; causing the individuals outside the first range to obtain the outlet information through a neighbor individual, wherein the outlet information is spread between individuals in the form of credibility gradually reduced outside the first range; according to the outlet information received by each individual, adopting a social force model to calculate individual speed and direction in real time, and achieving simulation of people evacuation behaviors. According to the method and system for people evacuation simulation under the emergencies, by introducing a transmission mechanism with information loss, the learning of the evacuating environment by the individuals is simulated, and scientific instruction of an emergency safe evacuation plan can be achieved.

The invention discloses a building fire situation assessment and personnel evacuating indication method and system. The building fire situation assessment and personnel evacuating indication method includes steps: monitoring fire information timely and calculating fire source position information, fire source intensity information and fire development situation information according to the fire information; estimating personnel position information in all areas in a building and personnel density distribution in all the areas; and calculating a best evacuating direction and a best evacuating path according to the fire source position information, the fire source intensity information, the fire development situation information, the personnel position information and the personnel density distribution information in all the areas in the building and the building structure information. By adopting the building fire situation assessment and personnel evacuating indication method and system, a practicable solution is provided for personnel evacuating based on disaster development situation in the building by sufficiently using the modern techniques such as sensing, communication, calculating and decision making, and decision making and evacuating efficiencies are improved.

The invention provides a fire evacuation system and method based on indoor positioning, and belongs to the technical field of geographic information. The system comprises a mobile terminal, a server and multiple Beacon base stations, wherein connection between the mobile terminal and the server is established, so that the fire-fighting facility information, the fire behaviour and the indoor map ina building are obtained; wireless communication connection between the mobile terminal and the Beacon base station is established through low-power Bluetooth; the real-time position of the mobile terminal is calculated by utilization of a trilateral positioning algorithm; and furthermore, the position information is uploaded to the server. The system performs indoor positioning by using the Beacon equipment; the Beacon base stations are pre-arranged indoors and powered by a battery; and continuous positioning in a possible outage condition can be carried out when a fire happens.

The invention relates to a dynamic emergency evacuation method for failure of urban rail transit lines, which relates to the technical field of rail transit control. The problem of secondary propagation of stranded passenger flow in network caused by limited evacuation capacity of single station is solved. The method comprises: attribute set and running state set of each station in the network being established; analyzing station passenger flow state ; SAS software being used to predict the passenger flow and simulate the arrival process of the passenger flow; determining evacuation starting point and evacuation end point; constructing the emergency rail transit cooperative evacuation network; constructing the dynamic path selection model in the range of destination; determining the best evacuation path; determining the number of emergency buses required and the interval between the buses; determining the distribution of passenger flow to be evacuated to the evacuation subway station;according to the parameters of rail transit train, determining the train transport capacity, combined with the passenger flow of subway station, to allocate the resources of train transport capacity,to formulate the train operation plan in emergency state. The invention increases the passenger flow evacuation capacity of a single node to improve the efficiency of network evacuation.

Provided is an intelligent fire emergency evacuation method, comprising the steps of: a, a control system establishing a visual emergency evacuation model; b, in case of disaster, the control system inputting a disaster alarm signal into the emergency evacuation model; c, the control system calculating and storing a shortest evacuation path from each node to an emergency exit, and meanwhile setting the evacuation direction of each node in the shortest evacuation path; d, the control system setting a personnel evacuation direction in each channel of the shortest evacuation path in the emergency evacuation model; and e, the control system controlling the switch and direction instruction of each evacuation indicator in each channel evacuation direction of the shortest evacuation path in the emergency evacuation model. The invention also provides a system for realizing the method. The shortest emergency evacuation path is automatically generated according to spot disaster conditions, allows personnel to safely, rapidly and orderly evacuate according to indication directions of the evacuation indicators in case of disaster, and has the characteristics of high evacuation efficiency and high safety.

The invention discloses a population evacuation simulation method and system based on a heterogeneous emotional contagion model. Firstly, a heterogeneous emotional contagion calculation method based on a Dupirinar model is designed. In the method, an emotional contagion calculation method based on grouping is proposed, influences of two factors of individual distance and relationship on the grouping are considered, a population grouping algorithm is used for grouping the population, and the influence of the grouping on the emotional contagion calculation is studied. On this basis, a method forcalculating the degree of panic based on characteristics is proposed, individuals are specilized according to characteristic differences in personality, gender and age, and the degree of panic is calculated by using the above characteristics. Secondly, the above heterogeneous emotional contagion model is coupled with population movement, a relative speed obstacle method is combined, and emotionsare used to drive the population movement. Finally, a realistic rendering method is used for simulating a population evacuation effect. The population evacuation simulation method and system based onthe heterogeneous emotional contagion model can observe emotional contagion phenomena in the population movement more realistically and intuitively.

The invention provides a safety emergency navigation device which comprises a communication element, a danger detector, an auxiliary positioner and a voice broadcast device.The danger detector detects whether danger signals exist in surrounding environment, the auxiliary positioner calculates distance between the danger signals and a user terminal when the danger signals are detected, the voice broadcast device plays emergency prompting voice when the danger signals are detected, and the communication element sends the danger signals and danger position information to a remote server and multiple safety emergency navigation devices in a building, sends the distance to the remove server, receives escape path information, corresponding to the user terminal, sent by the remote server and sends the escape path information to the user terminal.The safety emergency navigation device can detect the danger signals and acquire the escape path information corresponding to the user terminal; for users at different positions of the building, the users can be navigated to escape through the escape path information corresponding to the user terminal, so that efficiency and safety of people evacuation are improved.

The invention discloses a crowd evacuation simulation method and system based on an evacuation path set. The method includes the steps: extracting characteristics of an evacuation scene to obtain a two-dimensional model of the evacuation scene; acquiring all available evacuation paths based on the two-dimensional model of the evacuation scene and a social force model fusing obstacle avoiding strategies to obtain the evacuation path set; performing discretization operation on all paths in the evacuation path set, and calculating crowd distribution degree and block degree information in real time to obtain evaluation values of each individual in crown for the all paths in the evacuation path set; building a roulette according to the evaluation values of each individual in the crown for the all paths in the evacuation path set, and selecting an optimum evacuation path by the aid of pseudo random selection strategies based on the roulette and stable factors to achieve simulation of crowd evacuation processes. According to the method, evacuation strategies are changed in real time by a simulation individual according to current evacuation environments, and safety evacuation plans of sudden events can be scientifically guided.

An evacuation system including an evacuation member engages a product package and applies pressure thereto, such that a product in the product package moves toward an outlet in the product package for dispensing. A controller monitors the force applied by a driver to the product package, thereby ensuring that the pressure remains below a particular threshold to protect the integrity of the product package. The controller further monitors the evacuation member location, thereby enabling the controller to recognize when the product package is empty. The evacuation system further includes a package carrier including a pinch-off area that moves product out of an unrecoverable portion of the product package. The evacuation member may be utilized as a stand-alone device or with a primary device, wherein the primary device provides signals to the evacuation system and the evacuation system provides product to the primary device.

The embodiment of the invention provides a passenger flow evacuation method and device, and belongs to the field of data processing. The method includes: obtaining traffic history flow data, and thenanalyzing expected passenger flow of a target site in an expected time period of an expected date according to the traffic history flow data; and obtaining a passenger flow prediction result of the target site in the expected time period, then selecting a corresponding preset evacuation scheme or customizing an appropriate evacuation scheme according to the passenger flow prediction result to carry out accurate evacuation with clear destinations and clear people quantity on passenger flow. According to the method, the passenger flow of the expected date is predicted according to the traffic passenger flow data, thus existing passenger flow on a vehicle, quantity of passenger flow in a future time period and the destinations at which passengers wish to arrive can be inferred, then the passenger flow destination and passenger flow quantity-oriented appropriate accurate evacuation scheme is designed or selected, thus timely and effective evacuation can be carried out on the passenger flow, evacuation efficiency is high, and an effect is good.

The invention provides an urban rail transit station emergency evacuation capability assessment system, and relates to the technical field of urban rail transit operation management. The system comprises a station infrastructure management subsystem which generates a station topological structure and stores the generated station topological structure; an evacuation network generation subsystem which determines the station infrastructure passage capacity according to the station topological structure and generates an evacuation network; a feasible evacuation path generation subsystem which calculates and generates a feasible evacuation path according to the passage capacity of each infrastructure in the evacuation network and the walking time of each path; and an evacuation capability assessment subsystem which simulate the evacuation path, selects assessment indicators and displays the assessment indicator result. Accurate assessment of the station emergency evacuation capability can be realized through equilibrium allocation in the passenger flow evacuation network so that data guidance can be provided for passenger flow evacuation induction, the utilization rate of the station infrastructures can be enhanced, equilibrium utilization of the infrastructure resources can be realized and the evacuation efficiency can be enhanced.

The invention discloses an indoor crowd evacuation method which comprises the steps of scene model initialization: dividing a plane graph according to a grid rule to generate a cellular space according to the plane graph of a building venue where pedestrians are located, and initializing the cellular space; a pedestrian evacuation step: on the basis of determining a cellular state updating rule, enabling the cellular occupied by each pedestrian to perform state updating according to the rule in a discrete time step, and recording the position of the pedestrian in each time step until all the pedestrians escape from the venue; path planning: providing path planning information for each pedestrian according to the operation result of the model and the identity of the pedestrian, and guidingthe pedestrian to escape from the venue; according to the method, various influence factors are considered, so that when a disaster occurs, the crowd evacuation efficiency can be improved through themethod, crowd congestion is avoided, meanwhile, a path plan can be provided for each person through the method, each person is guided to leave a building or a venue, and collision with other people isavoided.

An evacuation system including an evacuation member engages a product package and applies pressure thereto, such that a product in the product package moves toward an outlet in the product package for dispensing. A controller monitors the force applied by a driver to the product package, thereby ensuring that the pressure remains below a particular threshold to protect the integrity of the product package. The controller further monitors the evacuation member location, thereby enabling the controller to recognize when the product package is empty. The evacuation system further includes a package carrier including a pinch-off area that moves product out of an unrecoverable portion of the product package. The evacuation member may be utilized as a stand-alone device or with a primary device, wherein the primary device provides signals to the evacuation system and the evacuation system provides product to the primary device.

An evacuation system including an evacuation member engages a product package and applies pressure thereto, such that a product in the product package moves toward an outlet in the product package for dispensing. A controller monitors the force applied by a driver to the product package, thereby ensuring that the pressure remains below a particular threshold to protect the integrity of the product package. The controller further monitors the evacuation member location, thereby enabling the controller to recognize when the product package is empty. The evacuation system further includes a package carrier including a pinch-off area that moves product out of an unrecoverable portion of the product package. The evacuation member may be utilized as a stand-alone device or with a primary device, wherein the primary device provides signals to the evacuation system and the evacuation system provides product to the primary device.

The invention discloses a crowd evacuation simulation method and system based on deep reinforcement learning. The method comprises the steps of initializing a constructed evacuation scene simulation model according to scene information and crowd parameter information; grouping crowds, and dividing leaders and followers of each group; adopting a hierarchical path planning method to obtain evacuation paths of crowds, wherein a leader in an upper-layer group performs global path planning through an EMADDPG algorithm to obtain an optimal evacuation path, and followers in a lower-layer group avoidobstacles and follow the leader to evacuate along the optimal evacuation path. A learning curve and a high-priority experience playback strategy are introduced on the basis of a traditional MADDPG algorithm, an EMADDPG algorithm is formed, the learning efficiency of the algorithm is improved, a hierarchical path planning method is provided on the basis of the EMADDPG algorithm and used for planning evacuation paths of crowds, the path planning time is effectively shortened, and the crowd evacuation efficiency is improved. People can be better guided to evacuate, and the crowd evacuation efficiency is improved.

The invention discloses an emergency pick-up location setting method for emergency evacuation. According to the method, an evacuation region is divided into a plurality of evacuation cells; then, emptier public regions in the evacuation cells are selected to be used as standby pick-up locations; the shortest walking distance from the mass center of each evacuation cell to each standby pick-up location in the evacuation cell is calculated; the standby pick-up location with the shortest walking distance in each cell is selected to be used as the emergency pick-up location of the cell; and evacuation pick-up location indicating sign boards, media and the like are matched for propagandizing the positions of the emergency pick-up locations and arriving methods to the masses in the evacuation cells. The method provided by the invention has the advantages that the concentration speed of the masses during the emergency evacuation can be accelerated; the evacuation can be timely realized through passenger carrying by buses; and the generation of confusion conditions is prevented, so that the rescue is in time, and the loss is reduced.

The invention discloses an intelligent safety protection system for a liquefied natural gas terminal tank zone, and belongs to the technical field of tank zone safety systems. The liquefied natural gas terminal tank zone comprises a gas detection module, a leakage alarm module, a fire detection module, a fire alarm module, a TV monitoring module, a broadcasting system module and an access controlmodule, wherein the gas detection module is used for monitoring gas concentration in a tank zone; the leakage alarm module is used for making an alarm when the gas concentration value exceeds the limit; the fire detection module is used for detecting the temperature and smoke concentration in the tank zone; the fire alarm module is used for making an alarm when the temperature or smoke concentration exceeds the limit; the TV monitoring module is used for recording an accident site image and playing the accident site image on a large screen; the broadcasting system module is used for playing voice information; and the access control module is used for controlling a controlled gate at each entrance/exit in the tank zone. Through adoption of the intelligent safety protection system, in the case of an accident, accident information can be played through the large screen and a broadcasting device, and meanwhile all controlled gates are opened simultaneously to instruct people in the tank zone to handle with a dangerous source or get out of a dangerous zone.

The invention discloses an emergency passenger evacuation ladder of a rail vehicle. The emergency passenger evacuation ladder aims to solve problems of high quantity of operation steps, long operation duration and poor service safety of an existing movable evacuation ladder. The emergency passenger evacuation ladder of the rail vehicle comprises a mounting frame and a ladder body, and the mounting frame is arranged on the lower side of a floor of a vehicle body; the upper end of the ladder body is movably connected with the bottom of the floor of the vehicle body or the bottom of the mounting frame, and the lower end of the ladder body is locked on the mounting frame by a locking device when the vehicle runs normally, and is unlocked by the locking device when the vehicle is under an emergency condition, so that the ladder body can be driven by an ejecting device to rotate to the lower side of a passenger compartment door; and an emergency control device used for controlling the ejecting device to drive the ladder body to be ejected is mounted in the vehicle, and controls the locking device via an emergency unlocking stay, so that the lower end of the ladder body can be unlocked by the unlocking device. The emergency passenger evacuation ladder has the advantages that passengers in the vehicle can operate the emergency control device to open the emergency passenger evacuation ladder under the emergency condition, and the emergency passenger evacuation ladder is good in safety and high in evacuation efficiency.