阅读说明：本技术 一种用于公共场所最短逃生路线的快速生成系统及方法 (Rapid generation system and method for shortest escape route in public place ) 是由 蒋辉 周有 蔡彦坡 冯悦兵 裴伟 吕东成 于 2021-07-01 设计创作，主要内容包括：本发明公开了一种用于公共场所最短逃生路线的快速生成系统及方法,包括：可逃生路径规划模块、逃生路线库、逃生环境监测模块、灯具指示控制模块和逃生路线生成模块,通过可逃生路径规划模块将逃生通道进行分割再重新连接,获取有一个安全出口的逃生路线,通过比较逃生路径长度生成最短逃生路线至逃生路线库中,节省了逃生时间、减轻了编制疏散预案的工作量,模拟火灾现场,提取最短逃生路线,获取该路线上所有烟雾传感器探测到的烟雾浓度,分析烟雾扩散方向,通过灯具指示控制模块判断烟雾扩散方向是否与灯具指示方向一致,调整灯具指示方向以改变逃生路线,避免将人员疏散至烟雾大的地方,减少了人员因烟雾造成身体损伤甚至死亡的概率。(The invention discloses a system and a method for quickly generating the shortest escape route in public places, which comprises the following steps: an escape route planning module, an escape route library, an escape environment monitoring module, a lamp indication control module and an escape route generation module, the escape passage is divided and reconnected by the escape path planning module to obtain an escape route with a safety exit, the shortest escape route is generated by comparing the lengths of the escape routes and is sent to an escape route library, so that the escape time is saved, the workload of compiling evacuation plans is reduced, a fire scene is simulated, the shortest escape route is extracted, the smoke concentration detected by all smoke sensors on the route is obtained, the smoke diffusion direction is analyzed, whether the smoke diffusion direction is consistent with the indication direction of the lamp or not is judged through the lamp indication control module, the indication direction of the lamp is adjusted to change an escape route, people are prevented from being evacuated to a place with large smoke, and the probability that the people are damaged and even die due to the smoke is reduced.)

1. A quick generation system for a shortest escape route in a public place is characterized in that: the system comprises: an escape route planning module (S1), an escape route library (S2), an escape environment monitoring module (S3), a lamp indication control module (S4) and an escape route generation module (S5);

the escape route planning module (S1) models the public place, and divides the escape passage in the public place into regions: dividing a straight indicating lamp into one area, generating an escape route of each divided area under the condition that the indicating lamp is fully lighted, obtaining the passable distance of the corresponding divided area according to the sum of the distance between the measured lamps and the distance between the lamps and the safety exit, connecting the connectable escape routes in the divided areas to obtain the complete escape route length, comparing the escape route lengths to generate a shortest escape route with the safety exit, and storing the generated escape route in an escape route library (S2);

through environmental monitoring module (S3) simulation conflagration scene of fleing, all personnel' S positions when the location conflagration takes place, draw the shortest route of fleing that begins from a nearest lamps and lanterns from personnel, the position of response ignition, the smog concentration that each smoke transducer detected on the route of fleing is acquireed, the direction of current smog diffusion is judged according to the smog concentration size that each smoke transducer detected to lamps and lanterns instruction control module (S4), confirm to detect the smog transducer that smog concentration is the biggest and the smog transducer position that concentration is the minimum, the biggest smog transducer direction of the directional concentration of the smog transducer that concentration is the minimum is as smog diffusion direction, analysis smog diffusion direction and lamps and lanterns instruct the direction contained angle, set up the contained angle threshold value, compare with the contained angle threshold value, judge whether lamps and lanterns instruct direction and smog diffusion direction unanimously: if not, the indicating direction of the lamp is not changed; if the two lamps are consistent, the corresponding lamp is used as a related lamp, the position of the lamp is confirmed, the related lamp is closed to point to the smoke diffusion direction, and the escape route which cannot pass through is eliminated through the escape route generation module (S5).

2. The system for rapidly generating the shortest escape route in public places according to claim 1, wherein: the escape route planning module (S1) comprises a public place modeling unit, a safety exit positioning unit, a lamp area dividing unit, a sub-area route generating unit, an escape route connecting unit, a passable distance measuring unit and a shortest route generating unit, wherein the public place modeling unit models by taking a place center as an origin, confirms the positions of all safety exits through the safety exit positioning unit, and divides all indicating lamps in an escape channel through the lamp area dividing unit: dividing a straight indicating lamp into one region, generating an escape route for each divided region by the divided region route generating unit under the condition that the indicating lamp is fully lighted, measuring the distance between the lamps and a safety exit by the passable distance measuring unit, wherein the sum of the distances is the passable distance of the corresponding region, connecting the connectable escape routes in the divided regions by the escape route connecting unit to obtain the connected escape route length, comparing the escape route lengths by the shortest route generating unit to generate the shortest escape route, and storing the generated escape route in the escape route library (S2).

3. The system for rapidly generating the shortest escape route in public places according to claim 1, wherein: the environmental monitoring module of fleing (S3) includes the scene of fire analog unit, personnel real-time positioning unit, route extraction unit, ignition point induction element and smog concentration induction element of fleing, through the scene of fire analog unit simulates the scene of fire, through personnel real-time positioning unit location conflagration takes place the position of everybody when taking place, route extraction unit of fleing is in draw the shortest route of fleing that begins from the nearest lamps and lanterns of personnel in the route storehouse of fleing (S2), through ignition point induction element acquires the position of ignition point, through smog concentration induction element acquires the smog concentration that each smoke transducer on the route of fleing that draws and detect.

4. The system for rapidly generating the shortest escape route in public places according to claim 1, wherein: the lamp indication control module (S4) comprises a smoke diffusion direction analysis unit, a correlation direction test unit, a correlation lamp confirmation unit and an indication direction adjustment unit, wherein the smoke diffusion direction analysis unit judges the current smoke diffusion direction according to the smoke concentration detected by the smoke sensor, the correlation direction test unit tests whether the lamp indication direction is consistent with the smoke diffusion direction, if so, a corresponding lamp is used as a correlation lamp, the correlation lamp confirms the position of the correlation lamp in the smoke diffusion direction, and the indication direction of the correlation lamp pointing to the smoke diffusion direction is closed by the indication direction adjustment unit, so that an unavailable escape route is eliminated, and a new shortest escape route is generated.

5. A quick generation method for the shortest escape route in public places is characterized by comprising the following steps: the method comprises the following steps:

s11: modeling in public places, and dividing escape passages: dividing a linear indicator light into a region;

s12: measuring the distance between the lamps in each area and the distance between the lamps and the safety exit as the passable distance, and connecting the escape paths;

s13: simulating a fire scene, extracting the shortest escape route, and detecting and analyzing the current smoke diffusion direction;

s14: judging the consistency of the smoke diffusion direction and the indicating direction of the lamp: if not, the indicating direction of the lamp is not changed; if the two escape routes are consistent, the indication direction of the lamp is adjusted, and a new escape route is generated.

6. The method for rapidly generating the shortest escape route in public places according to claim 5, wherein the method comprises the following steps: in steps S11-S12: performing dimension reduction processing on a public place, establishing a two-dimensional coordinate system by taking the center of the public place as an origin, and setting the position coordinate set positioned to a safety exit as (X, Y) { (X)₁，Y₁)，(X₂，Y₂)，...，(X_m，Y_m) Dividing escape channels: dividing a straight indicating lamp into the same region, and generating a set of escape routes of all the divided regions as L ═ L when the indicating lamp is fully on₁，L₂，...，L_nM represents the number of safety exits, n represents the number of escape paths, and the distance from a safety exit to the nearest lamp in an area with the safety exit is measured as d_iDistance between lamps is D_iK lamps are arranged in the area, and the passable distance D of the area is calculated according to the following formula_{Total of i}：

D_{Total of i}＝d_i+(k-1)*D_i；

If there is no safe exit in the partition area, the sum of the distances between the lamps is used as the passable distance, the passable distances of all the connectable partition areas are calculated according to the same mode, N areas with safe exits are obtained, and the number of the areas can correspond to the number of the zonesThe areas without the safety exits connected with the areas are respectively provided with M ═ { M1, M2.., MN }, and the areas are connected with the escape areas to obtain an escape path length set d_{General assembly}＝{d₁，d₂，...，d_MNComparing the lengths of the escape paths to obtain a set of the shortest escape path lengths with a safety exit as d_min＝{d_min1，d_min2，...，d_minNAnd storing the obtained shortest escape route into an escape route library (S2).

7. The method for rapidly generating the shortest escape route in public places according to claim 5, wherein the method comprises the following steps: in step S13: simulating a fire scene, locating the position of a random person when a fire occurs, extracting the shortest escape route where a safety exit closest to the position is located, detecting the smoke concentration by using smoke sensors on the route, wherein the position coordinate of the smoke sensor with the minimum detected concentration is (x)_min，y_min) The position coordinate of the smoke sensor with the maximum concentration is (x)_max，y_max) Obtaining the smoke diffusion vector asThe direction in which the smoke diffusion vector points is the smoke diffusion direction.

8. The method for rapidly generating the shortest escape route in public places according to claim 7, wherein the method comprises the following steps: in step S14: locating a random lamp indication starting point coordinate (x) on the extracted shortest escape route_{Get up}，y_{Get up}) The coordinate of the indicating end point of the lamp is (x)_{Final (a Chinese character of 'gan')}，y_{Final (a Chinese character of 'gan')}) Obtaining the indication vector of the lampCalculating the included angle theta between the smoke diffusion vector and the indicating vector of the lamp according to the following formula:

setting the included angle threshold theta_minComparing theta with theta_min: if theta > theta_minThe consistency between the smoke diffusion direction and the indicating direction of the lamp is low, and the indicating direction of the lamp is not changed; if theta is less than or equal to theta_minAnd if the consistency between the smoke diffusion direction and the indicating direction of the lamp is high, closing the indicating direction of the lamp, forbidding escape from the indicating direction of the lamp, adjusting all indicating lamps to judge whether the escape route passes, and if the escape route cannot pass, extracting a new escape route for testing until the escape route can pass.

Technical Field

The invention relates to the technical field of fire-fighting escape navigation, in particular to a system and a method for quickly generating a shortest escape route in a public place.

Background

When an evacuation project is in construction, in order to start a corresponding evacuation plan when a fire disaster occurs, engineering personnel need to compile the corresponding evacuation plan according to the position, the direction and the positions of escape channels indicating lamps in a public building in advance, for a public place with a plurality of safety exits, escape routes are complex and various, one engineering personnel needs to compile tens of thousands of evacuation plans, the workload is large, the repeated work is needed, the difficulty of compiling the evacuation plan by the personnel is large, the automatic generation of the escape routes can reduce the personnel operation, the difficulty and the possibility of errors are reduced, in each evacuation plan, due to different ignition points, the corresponding evacuation plan needs to be adjusted, the position with possible ignition can be preselected in the traditional mode, the escape route is obtained according to the ignition position, the escape route is compared with the escape route length to generate the shortest escape route, although the escape route generated by the mode can accurately screen the shortest escape route when different places are on fire, the fire escape system is not the most suitable in practical application places, firstly, the fire spread on a fire scene is uncontrollable, the fire on the shortest escape route is probably the largest, the safety of personnel cannot be guaranteed to the greatest extent although the escape time is short, and the personnel are possibly in danger invisibly by evacuating the personnel according to the pre-generated shortest escape route; secondly, the main factor causing casualties in fire accidents is smoke generated by combustible materials in a fire scene, the escape direction of the shortest escape route can be the smoke diffusion direction, the shortest escape route generated by collecting public place information through big data is extracted during escape, the smoke diffusion direction is judged according to the smoke concentration detected by a smoke sensor on the route, then the smoke diffusion direction is compared with the indication direction of a lamp in a consistency mode, the indication direction of the indicator lamp is adjusted in real time, and the casualties rate of people can be reduced to the maximum extent on the premise that the shortest escape route is generated quickly to save escape time.

Therefore, a system and a method for quickly generating the shortest escape route in public places are needed to solve the problems.

Disclosure of Invention

The invention aims to provide a system and a method for quickly generating the shortest escape route in public places, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: a quick generation system and a method for the shortest escape route in public places are characterized in that: the system comprises: the system comprises an escape route planning module, an escape route library, an escape environment monitoring module, a lamp indication control module and an escape route generation module;

the escape route planning module models public places and divides escape passages in the public places into regions: dividing a straight indicating lamp into one area, generating an escape route of each divided area under the condition that the indicating lamp is fully lighted, obtaining the passable distance of the corresponding divided area according to the sum of the distance between the measured lamps and the distance between the lamps and a safety exit, connecting the connectable escape routes in the divided areas to obtain the complete escape route length, comparing the escape route lengths, generating a shortest escape route with the safety exit, and storing the generated escape route in an escape route library;

through it is on-spot to flee environment monitoring module simulation conflagration, all personnel's positions when the location conflagration takes place, draw the shortest route of fleing that begins from a nearest lamps and lanterns from personnel, the position of response ignition, the smog concentration that each smoke transducer detected on acquireing the route of fleing, lamps and lanterns instruct control module to judge the direction of current smog diffusion according to the smog concentration size that each smoke transducer detected, confirm the smog transducer that detects smog concentration the biggest and the smog transducer position that concentration is the minimum, regard the biggest smog transducer direction of the directional concentration of the smog transducer that concentration is the minimum as smog diffusion direction, analysis smog diffusion direction and lamps and lanterns instruct the direction contained angle, set up the contained angle threshold value, compare with the contained angle threshold value, judge whether lamps and lanterns instruct direction and smog diffusion direction unanimously: if not, the indicating direction of the lamp is not changed; if the two lamps are consistent, the corresponding lamp is used as a related lamp, the position of the lamp is confirmed, the related lamp is closed to point to the smoke diffusion direction, and the escape route which cannot pass through is eliminated through the escape route generation module.

Furthermore, the escape route planning module comprises a public place modeling unit, a safety exit positioning unit, a lamp area dividing unit, a regional path generating unit, an escape route connecting unit, a passable distance measuring unit and a shortest route generating unit, wherein the public place modeling unit uses a place center as an original point for modeling, the positions of all safety exits are confirmed through the safety exit positioning unit, and all indicating lamps in an escape passage are divided through the lamp area dividing unit: dividing a straight indicating lamp into one region, generating an escape route of each divided region by the regional route generating unit under the condition that the indicating lamp is fully lighted, measuring the distance between the lamps and a safety exit by the passable distance measuring unit, wherein the sum of the distances is the passable distance of the corresponding region, connecting the connectable escape routes in the divided regions by the escape route connecting unit to obtain the connected escape route length, comparing the escape route lengths by the shortest route generating unit to generate the shortest escape route, and storing the generated escape route in the escape route library.

Further, the environmental monitoring module of fleing includes scene of fire analog unit, personnel real-time positioning unit, route of fleing extraction unit, ignition point induction element and smog concentration induction element, through scene of fire analog unit simulates the scene of fire, through personnel real-time positioning unit location conflagration when taking place all people's position, route of fleing extraction unit is in extract the shortest route of fleing that begins from the nearest lamps and lanterns of personnel in the route storehouse of fleing, through ignition point induction element acquires the position of ignition point, through smog concentration induction element acquires the smog concentration that each smoke transducer on the route of fleing that extracts detects.

Furthermore, the lamp indication control module comprises a smoke diffusion direction analysis unit, a correlation direction test unit, a correlation lamp confirmation unit and an indication direction adjustment unit, wherein the smoke diffusion direction analysis unit judges the current smoke diffusion direction according to the smoke concentration detected by the smoke sensor, the correlation direction test unit tests whether the lamp indication direction is consistent with the smoke diffusion direction, if so, the corresponding lamp is used as the correlation lamp, the correlation lamp confirms the position of the correlation lamp in the smoke diffusion direction, the indication that the correlation lamp points to the smoke diffusion direction is closed through the indication direction adjustment unit, the escape route which cannot pass is eliminated, and the new shortest escape route is generated.

A quick generation method for the shortest escape route in public places comprises the following steps:

s11: modeling in public places, and dividing escape passages: dividing a linear indicator light into a region;

s12: measuring the distance between the lamps in each area and the distance between the lamps and the safety exit as the passable distance, and connecting the escape paths;

s13: simulating a fire scene, extracting the shortest escape route, and detecting and analyzing the current smoke diffusion direction;

s14: judging the consistency of the smoke diffusion direction and the indicating direction of the lamp: if not, the indicating direction of the lamp is not changed; if the two escape routes are consistent, the indication direction of the lamp is adjusted, and a new escape route is generated.

Further, in steps S11-S12: performing dimension reduction processing on a public place, establishing a two-dimensional coordinate system by taking the center of the public place as an origin, and setting the position coordinate set positioned to a safety exit as (X, Y) { (X)₁，Y₁)，(X₂，Y₂)，...，(X_m，Y_m) Dividing escape channels: a straight line indicating lampDividing the two-dimensional space into the same region, and generating a set of escape routes of all the divided regions as L ═ L { L when the indicating lamp is fully on₁，L₂，...，L_nM represents the number of safety exits, n represents the number of escape paths, and the distance from a safety exit to the nearest lamp in an area with the safety exit is measured as d_iDistance between lamps is D_iK lamps are arranged in the area, and the passable distance D of the area is calculated according to the following formula_{Total of i}：

D_{Total of i}＝d_i+(k-1)*D_i；

If no safe exit exists in the divided areas, the sum of the distances between the lamps is taken as the passable distance, the passable distances of all the connectable divided areas are calculated according to the same mode, N areas with safe exits are obtained, M ═ M1, M2,. multidot.MN } areas which can be connected with the corresponding areas and do not have safe exits are obtained, the escape areas are connected, and the escape path length set d is obtained_{General assembly}＝{d₁，d₂，...，d_MNComparing the lengths of the escape paths to obtain a set of the shortest escape path lengths with a safety exit as d_min＝{d_min1，d_min2，...，d_minNAnd storing the obtained shortest escape route in an escape route library, calculating the passable distance of the area according to the lamp spacing of the divided area and the lamp-to-safety exit spacing, aiming at connecting the area with the area without the safety exit, screening the escape route with the safety exit, calculating the length of the connected escape route, and generating the shortest escape route with the safety exit by comparing the lengths of the escape routes, so that the workload of constructing an evacuation plan is reduced on the premise of saving escape time.

Further, in step S13: simulating a fire scene, locating the position of a random person when a fire occurs, extracting the shortest escape route where a safety exit closest to the position is located, detecting the smoke concentration by using smoke sensors on the route, wherein the position coordinate of the smoke sensor with the minimum detected concentration is (x)_min，y_min) Smoke with maximum concentrationThe position coordinate of the fog sensor is (x)_max，y_max) Obtaining the smoke diffusion vector asThe direction in which the smoke diffusion vector points is the smoke diffusion direction.

Further, in step S14: locating a random lamp indication starting point coordinate (x) on the extracted shortest escape route_{Get up}，y_{Get up}) The coordinate of the indicating end point of the lamp is (x)_{Final (a Chinese character of 'gan')}，y_{Final (a Chinese character of 'gan')}) Obtaining the indication vector of the lampCalculating the included angle theta between the smoke diffusion vector and the indicating vector of the lamp according to the following formula:

setting the included angle threshold theta_minComparing theta with theta_min: if theta > theta_minThe consistency between the smoke diffusion direction and the indicating direction of the lamp is low, and the indicating direction of the lamp is not changed; if theta is less than or equal to theta_minAnd if the smoke diffusion direction is consistent with the indicating direction of the lamp, closing the indicating direction of the lamp, forbidding escape from the indicating direction of the lamp, judging whether the escape route passes through after all indicating lamps are adjusted, if the escape route does not pass through, extracting a new escape route for testing until the escape route passes through, analyzing the whole smoke diffusion direction, forming smoke diffusion vectors according to the relative positions of the smoke sensors with the minimum and maximum detected smoke concentrations, and calculating the included angle between the smoke diffusion vectors and the extracted indicating vector of the lamp on the shortest escape route, so as to judge whether the smoke diffusion direction is consistent with the indicating direction of the lamp, flexibly adjusting the indicating direction of the lamp, avoiding people from being evacuated to places with large smoke, and reducing the probability of body damage and even death of the people caused by smoke.

Compared with the prior art, the invention has the following beneficial effects:

1. the lamp and the safety exit data of the escape place are acquired through big data, the escape passages are divided and reconnected through the escape path planning module, an escape route with a safety exit is obtained, the shortest escape route is generated by comparing the lengths of the escape routes, the shortest escape route is stored in the escape route library, the shortest escape route is planned in advance, and the complexity of planning an evacuation plan is reduced on the premise of saving escape time; the fire scene is simulated through the escape environment monitoring module, the shortest escape route is extracted according to the real-time position of a person, the smoke concentration detected by all smoke sensors on the route is obtained, the approximate diffusion direction of smoke is analyzed according to the smoke concentration, whether the smoke diffusion direction is consistent with the lamp indication direction or not is judged through the lamp indication control module, the lamp indication direction is flexibly adjusted, the escape route is changed, the person is prevented from being evacuated to a place with large smoke, and the probability that the person is damaged or even dies due to smoke is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a block diagram of a rapid generation system for a shortest escape route in a public place according to the present invention;

FIG. 2 is a flow chart of a method for rapidly generating the shortest escape route for public places according to the present invention;

fig. 3 is a schematic diagram of a method for determining the consistency between the smoke diffusion direction and the indication direction of the lamp.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Referring to fig. 1-3, the present invention provides the following technical solutions: a quick generation system and a method for the shortest escape route in public places are characterized in that: the system comprises: an escape route planning module S1, an escape route library S2, an escape environment monitoring module S3, a lamp indication control module S4 and an escape route generation module S5;

the escape route planning module S1 models the public place and divides the escape passage in the public place into regions: dividing a straight indicating lamp into one area, generating an escape route of each divided area under the condition that the indicating lamp is fully lighted, obtaining the passable distance of the corresponding divided area according to the sum of the distance between the measured lamps and the distance between the lamps and the safety exit, connecting the connectable escape routes in the divided areas to obtain the complete escape route length, comparing the escape route lengths, generating a shortest escape route with the safety exit, and storing the generated escape route in an escape route library S2;

simulate the scene of a fire through environment monitoring module S3 of fleing, all personnel' S positions when the location conflagration takes place, draw the shortest route of fleing that begins from a nearest lamps and lanterns from personnel, the position of response ignition, acquire the smog concentration that each smoke transducer detected on the route of fleing, lamps and lanterns instruct control module S4 to judge the direction of current smog diffusion according to the smog concentration size that each smoke transducer detected, confirm the smog transducer that detects smog concentration the biggest and the smog transducer position that concentration is minimum, the biggest smog transducer direction of the directional concentration of the smog transducer that will concentration the minimum is regarded as smog diffusion direction, analysis smog diffusion direction and lamps and lanterns instruct the direction contained angle, set up the contained angle threshold value, compare with the contained angle threshold value, judge whether lamps and lanterns instruct direction and smog diffusion direction unanimously: if not, the indicating direction of the lamp is not changed; if the two lamps are consistent, the corresponding lamp is used as the associated lamp, the position of the lamp is confirmed, the indication that the associated lamp points to the smoke diffusion direction is turned off, and the escape route which cannot pass through is eliminated through the escape route generation module S5.

The escape route planning module S1 comprises a public place modeling unit, a safety exit positioning unit, a lamp area dividing unit, a divided area route generating unit, an escape route connecting unit, a passable distance measuring unit and a shortest route generating unit, wherein the public place modeling unit uses a place center as an original point for modeling, the positions of all safety exits are confirmed through the safety exit positioning unit, and all indicating lamps in an escape channel are divided through the lamp area dividing unit: dividing a straight indicating lamp into one region, generating an escape route of each divided region by a regional route generating unit under the condition that the indicating lamp is fully lighted, measuring the distance between the lamps and a safety exit by a passable distance measuring unit, wherein the sum of the distances is the passable distance of the corresponding region, connecting the connectable escape routes in the divided regions by an escape route connecting unit to obtain the connected escape route length, comparing the escape route lengths by a shortest route generating unit to generate the shortest escape route, and storing the generated escape route in an escape route library S2.

The escape environment monitoring module S3 comprises a fire scene simulation unit, a personnel real-time positioning unit, an escape route extraction unit, an ignition point sensing unit and a smoke concentration sensing unit, wherein the fire scene is simulated by the fire scene simulation unit, the positions of all people in the case of fire are positioned by the personnel real-time positioning unit, the shortest escape route starting from the nearest lamp to the personnel is extracted by the escape route extraction unit in an escape route library S2, the position of the ignition point is obtained by the ignition point sensing unit, and the smoke concentration detected by each smoke sensor on the extracted escape route is obtained by the smoke concentration sensing unit.

The lamp indication control module S4 comprises a smoke diffusion direction analysis unit, a correlation direction test unit, a correlation lamp confirmation unit and an indication direction adjustment unit, wherein the smoke diffusion direction analysis unit judges the current smoke diffusion direction according to the smoke concentration detected by the smoke sensor, the correlation direction test unit tests whether the lamp indication direction is consistent with the smoke diffusion direction, if so, the corresponding lamp is used as the correlation lamp, the position of the correlation lamp in the smoke diffusion direction is confirmed through the correlation lamp, the indication that the correlation lamp points to the smoke diffusion direction is closed through the indication direction adjustment unit, the escape route which cannot pass is eliminated, and the new shortest escape route is generated.

A quick generation method for the shortest escape route in public places comprises the following steps:

s11: modeling in public places, and dividing escape passages: dividing a linear indicator light into a region;

s12: measuring the distance between the lamps in each area and the distance between the lamps and the safety exit as the passable distance, and connecting the escape paths;

s13: simulating a fire scene, extracting the shortest escape route, and detecting and analyzing the current smoke diffusion direction;

s14: judging the consistency of the smoke diffusion direction and the indicating direction of the lamp: if not, the indicating direction of the lamp is not changed; if the two escape routes are consistent, the indication direction of the lamp is adjusted, and a new escape route is generated.

In steps S11-S12: performing dimension reduction processing on a public place, establishing a two-dimensional coordinate system by taking the center of the public place as an origin, and setting the position coordinate set positioned to a safety exit as (X, Y) { (X)₁，Y₁)，(X₂，Y₂)，...，(X_m，Y_m) Dividing escape channels: dividing a straight indicating lamp into the same region, and generating a set of escape routes of all the divided regions as L ═ L when the indicating lamp is fully on₁，L₂，...，L_nM represents the number of safety exits, n represents the number of escape paths, and the distance from a safety exit to the nearest lamp in an area with the safety exit is measured as d_iDistance between lamps is D_iK lamps are arranged in the area, and the passable distance D of the area is calculated according to the following formula_{Total of i}：

D_{Total of i}＝d_i+(k-1)*D_i；

If no safe exit exists in the partitioned area, the sum of the distances between the lamps is taken as the passable distance, the passable distances of all the connectable partitioned areas are calculated according to the same mode, N areas with safe exits are obtained, M ═ M1, M2,. multidot.MN } areas which can be connected with the corresponding areas and do not have safe exits are obtained, the escape areas are connected, and the escape path length set is obtainedAnd d is_{General assembly}＝{d₁，d₂，...，d_MNComparing the lengths of the escape paths to obtain a set of the shortest escape path lengths with a safety exit as d_min＝{d_min1，d_min2，...，d_minNAnd storing the obtained shortest escape route in an escape route library S2, calculating the passable distance of the area according to the lamp spacing of the divided area and the lamp-to-safety exit spacing, aiming at connecting the area with the area without the safety exit, screening out the escape route with the safety exit, calculating the length of the connected escape route, and generating the shortest escape route with the safety exit by comparing the lengths of the escape routes, so that the escape time is saved and the workload of constructing an evacuation plan is reduced.

In step S13: simulating a fire scene, locating the position of a random person when a fire occurs, extracting the shortest escape route where a safety exit closest to the position is located, detecting the smoke concentration by using smoke sensors on the route, wherein the position coordinate of the smoke sensor with the minimum detected concentration is (x)_min，y_min) The position coordinate of the smoke sensor with the maximum concentration is (x)_max，y_max) Obtaining the smoke diffusion vector asThe direction in which the smoke diffusion vector points is the smoke diffusion direction.

In step S14: locating a random lamp indication starting point coordinate (x) on the extracted shortest escape route_{Get up}，y_{Get up}) The coordinate of the indicating end point of the lamp is (x)_{Final (a Chinese character of 'gan')}，y_{Final (a Chinese character of 'gan')}) Obtaining the indication vector of the lampCalculating the included angle theta between the smoke diffusion vector and the indicating vector of the lamp according to the following formula:

setting the included angle threshold theta_minComparing theta with theta_min: if theta > theta_minThe consistency between the smoke diffusion direction and the indicating direction of the lamp is low, and the indicating direction of the lamp is not changed; if theta is less than or equal to theta_minAnd if the smoke diffusion direction is consistent with the indicating direction of the lamp, closing the indicating direction of the lamp, forbidding escape from the indicating direction of the lamp, judging whether the escape route passes through after all indicating lamps are adjusted, if the escape route does not pass through, extracting a new escape route for testing until the escape route passes through, analyzing the whole smoke diffusion direction, forming smoke diffusion vectors according to the relative positions of the smoke sensors with the minimum and maximum detected smoke concentrations, and calculating the included angle between the smoke diffusion vectors and the extracted indicating vector of the lamp on the shortest escape route, so as to judge whether the smoke diffusion direction is consistent with the indicating direction of the lamp, flexibly adjust the indicating direction of the lamp, avoid evacuating people to a place with large smoke, and effectively reduce the probability of body damage and even death of the people caused by smoke.

The first embodiment is as follows: simulating a fire scene, locating the position of a random person when a fire occurs, extracting the shortest escape route where a safety exit closest to the position is located, detecting the smoke concentration by using smoke sensors on the route, wherein the position coordinate of the smoke sensor with the minimum detected concentration is (x)_min，y_min) The position coordinate of the smoke sensor with the maximum concentration is (x) as (5, 1)_max，y_max) (1, 5) to obtain a smoke diffusion vector ofThe direction pointed by the smoke diffusion vector is the smoke diffusion direction, and the coordinate of the indication starting point of a random lamp is positioned on the extracted shortest escape route_{Get up}，y_{Get up}) When the lamp indicates that the endpoint coordinate is (1, 1), (x) is set as the endpoint coordinate_{Final (a Chinese character of 'gan')}，y_{Final (a Chinese character of 'gan')}) Obtaining the indication vector of the lamp (1, 4)According to the formulaCalculating an included angle theta between the smoke diffusion vector and the indicating vector of the lamp to be 45 degrees, and setting an included angle threshold theta_minCompare θ with θ at 90 °_min：θ≤θ_minAnd if the consistency between the smoke diffusion direction and the indicating direction of the lamp is high, closing the indicating direction of the lamp, forbidding escape from the indicating direction of the lamp, adjusting all indicating lamps to judge whether the escape route passes, and if the escape route cannot pass, extracting a new escape route for testing until the escape route can pass.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.