CN114255555A - Fire escape guiding method, server and storage medium - Google Patents
Fire escape guiding method, server and storage medium Download PDFInfo
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- CN114255555A CN114255555A CN202011012853.9A CN202011012853A CN114255555A CN 114255555 A CN114255555 A CN 114255555A CN 202011012853 A CN202011012853 A CN 202011012853A CN 114255555 A CN114255555 A CN 114255555A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
- G08B7/066—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources guiding along a path, e.g. evacuation path lighting strip
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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Abstract
A fire escape guidance method, comprising: receiving video information sent by a camera installed in a monitored environment; determining the fire position according to the video information; generating at least one escape path according to the fire position, the exit position in the monitored environment and the LED light bars deployed in the monitored environment; receiving oxygen concentration information and length information of the LED light bar sent by a sensing node on the LED light bar; determining an optimal escape route based on the at least one escape route and the oxygen concentration information; generating indication information for controlling the LED light bar based on the optimal escape path; and sending the indication information to the LED light bar. The application also provides a server and a storage medium, which can effectively guide the user to quickly escape from the fire scene in time.
Description
Technical Field
The invention relates to the field of safety, in particular to a fire escape guiding method, a server and a storage medium.
Background
When a user encounters a fire in a strange place and smoke is diffused in the fire scene, the user may be in a problem of not knowing how to escape. The best escape time for a general fire situation is 90 seconds, how is the user escape in that short time? In reality, when a user encounters a fire, the user considers that people are more and escapes from the fire, and then the user runs along with the people. In fact, this practice sometimes puts itself in more trouble.
Disclosure of Invention
In view of the above, there is a need for a fire escape guidance method, a server and a storage medium, which can effectively guide people to evacuate to a correct position and prevent people from being unable to find an escape exit or an emergency room due to lost of direction and reduced judgment.
In view of the above, there is a need for a fire escape guidance method, which includes: the method is applied to a server and comprises the following steps:
receiving video information sent by a camera installed in a monitored environment;
determining the fire position according to the video information;
generating at least one escape path according to the fire position, the exit position in the monitored environment and the LED light bars deployed in the monitored environment;
receiving oxygen concentration information and length information of the LED light bar sent by a sensing node on the LED light bar;
determining an optimal escape route based on the at least one escape route and the oxygen concentration information;
generating indication information for controlling the LED light bar based on the optimal escape path;
and sending the indication information to the LED light bar.
According to some embodiments of the present application, the method of generating the at least one escape path comprises:
establishing a connection node based on the sensing nodes on the LED light bars, and setting a hierarchy corresponding to the connection node;
and generating an escape path according to all the established connection nodes and the corresponding hierarchies.
According to some embodiments of the present application, the establishing a connection node based on a sensing node on the LED light bar and setting a hierarchy level corresponding to the connection node comprises:
determining a plurality of sensing nodes based on exit positions in a monitored environment, establishing a first connecting node based on the plurality of sensing nodes, and setting a hierarchy corresponding to the first connecting node as a first hierarchy;
searching all adjacent nodes of the first connecting node;
establishing a second connecting node based on the searched adjacent nodes, and setting a hierarchy corresponding to the second connecting node as a second hierarchy;
continuing to search all adjacent nodes of the second connecting node, establishing a third connecting node based on the searched adjacent nodes, and setting a hierarchy corresponding to the third connecting node as a third hierarchy;
and establishing an i +1 th connecting node based on the searched adjacent nodes until all the adjacent nodes of the established i connecting node are searched, and setting a hierarchy corresponding to the i +1 th connecting node as an i +1 th hierarchy, wherein i is a positive integer.
According to some embodiments of the present application, the generating the escape path according to all the established connection nodes and the corresponding hierarchy includes:
taking the exit position in the monitored environment as the end point of the escape path;
searching a connection node corresponding to the sensing node on the LED light bar according to the end point;
and generating the escape paths according to a preset sequence according to the hierarchies corresponding to the connecting nodes.
According to some embodiments of the present application, if there is at least two escape routes sharing a connection node, the shared connection node is added to the shortest escape route of the at least two escape routes.
According to some embodiments of the application, the method further comprises:
sending control information to all the connecting nodes, and controlling all the connecting nodes to re-scan target connecting nodes in a preset range according to the level size, wherein the connecting nodes and the target connecting nodes are located in different escape paths;
responding to the connection node scanning to the target connection node, and adding the target connection node to the escape path where the connection node is located;
calculating a first length of an escape path where the connection node is located, and calculating a second length of the escape path after the connection node is added to the target connection node;
comparing the first length and the second length;
if the second length is smaller than the first length, the direction of the target connection node is changed, and the escape path after the target connection node is added is regenerated.
According to some embodiments of the application, the determining the optimal escape path comprises:
calculating the length of the at least one escape path;
calculating the reliability of the escape route based on the length, the oxygen concentration and a hierarchy corresponding to a connection node on the escape route;
and selecting the escape path with the highest reliability as the optimal escape path.
According to some embodiments of the present application, the reliability K1 of the escape path is calculated by the following formula:
wherein, W1、W2And W3The weight value is D, the length of the escape path is L, the level corresponding to the connecting node is L, and the oxygen concentration is N.
According to some embodiments of the application, the method further comprises:
if the escape path cannot be determined according to the fire position and the LED light bars deployed in the monitored environment, calculating the fireproof reliability of all rooms in the monitored environment;
determining a target room with highest fireproof reliability;
generating a safety path from the fire location, the target room, and LED light bars deployed in the monitored environment.
According to some embodiments of the present application, the fire safety reliability K of all rooms in the monitored environment is calculated by the following formula2：
Wherein, WiIs a weighted value, S represents the flame-retardant level of the material of the compartment in the room, F represents the flame-retardant level of the material of the floor in the room, D represents the flame-retardant level of the material of the door plate in the room, C represents whether the curtain in the room is made of fireproof material, O represents whether the room has a window to the outside, L1Indicating the user's floor in the monitored environment, L2Represents the floor of the fire location in the monitored environment, M represents all floors of the monitored environment, d represents the horizontal distance of the target room from the fire location, R1Represents the length, R, of the target room2Representing the width of the target room.
A second aspect of the present application provides a server, comprising:
a processor; and
a memory in which a plurality of program modules are stored, the program modules being loaded by the processor and executing the fire escape guidance method as described above.
The third aspect of the present application also provides a storage medium having at least one computer instruction stored thereon, the instruction being loaded by a processor and executing the fire escape guidance method as described above.
Compared with the prior art, the fire escape guiding method, the server and the storage medium provided by the invention can generate a plurality of escape paths in the LED light bars deployed in the monitored environment, and determine the optimal escape path according to the plurality of escape paths and the received oxygen concentration information; and generating indication information for controlling the LED light bar based on the optimal escape path, and sending the indication information to the LED light bar. To prompt the user to escape from a hazardous area in the monitored environment as quickly as possible.
Drawings
Fig. 1 is an application environment diagram of a preferred embodiment of the fire escape guidance method of the present invention.
FIG. 2 is a block diagram of a preferred embodiment of a sensing node according to the present invention.
Fig. 3 is a preferred embodiment of the fire escape guiding method according to the present invention.
Fig. 4A to 4D are schematic views of LED light bars.
Fig. 5 is a flowchart of a preferred embodiment of the fire escape guidance method of the present invention.
Fig. 6 is a schematic diagram of the generation of an escape path in a monitored environment.
Fig. 7 is a schematic view illustrating the propagation of a fire to the escape route.
Fig. 8 is a schematic plan view of a monitored environment.
Fig. 9 is a schematic diagram of the fire escape guidance method of the present invention initially generating an escape path according to neighboring nodes in the monitored environment.
Fig. 10 is a schematic diagram illustrating that the fire escape guidance method of the present invention continues to generate escape routes according to neighboring nodes in the monitored environment.
Fig. 11 is a schematic diagram of a fire escape guidance method according to the present invention, in which a new node cannot be found in the monitored environment according to an adjacent node, and an escape route is generated after the new node is obtained by scanning the end node of the escape route.
Fig. 12 is a schematic view illustrating sensing nodes around a fire escape route sequentially scanned by all sensing nodes on the fire escape route after the fire escape guidance method of the present invention generates the escape route.
FIG. 13 shows that after the fire escape guiding method of the present invention generates an escape path, the escape path passes through a sensing node A3Scan to A8And A9Schematic representation of (a).
FIG. 14 is a schematic view showing a case where the escape route is changed by the fire escape guidance method of the present invention8And A9And the escape direction is used for regenerating a schematic diagram of an escape path.
Fig. 15 is a block diagram of a preferred embodiment of the fire escape guiding apparatus according to the present invention.
Fig. 16 is a block diagram of a preferred embodiment of the server of the present invention.
Description of the main elements
Display screen 21
Oxygen concentration sensor 30
Ultrasonic obstacle sensor 31
Bluetooth beacon 33
Camera 4
LED light strip 5
Memory 11
Processor 12
Computer program 14
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
Referring to fig. 1 to 3, in the present embodiment, the fire escape guidance method is applied to an environment formed by a server 1, a mobile terminal 2, a sensor 3, and a camera 4. The server may be a cloud server, and the server is in communication connection with the mobile terminal 2, the sensor 3 and the camera 4.
In the present embodiment, the sensor 3 includes an oxygen concentration sensor 30, an ultrasonic obstacle sensor 31, and an infrared sensor 32. The oxygen concentration sensor 30 and the ultrasonic obstacle sensor 31 are disposed at both ends of each LED light stripe 5, and the LED light stripe 5 is disposed between a wall surface and the ground in the monitored environment. In the present embodiment, the oxygen concentration sensor 30, the ultrasonic obstacle sensor 31, and the bluetooth Beacon 33 (e.g., Beacon) constitute a sensing node 6, and the sensing node 6 is disposed at both ends of the LED light bar 5. An escape path may be generated based on the sensing node 6. The oxygen concentration sensor is used for detecting the oxygen concentration in the monitored environment; the ultrasonic obstacle sensor is used for detecting sensing nodes in a preset range. In one embodiment, the ultrasonic obstacle sensor is an ultrasonic distance sensor. The bluetooth beacon is used to provide the sensing node 6 with a communication function. The infrared sensor 32 is used to detect whether a person escapes from the monitored environment.
It should be noted that, in other embodiments, the sensing node 6 may be provided with a communication function, and may also be another communication unit in the prior art, for example, a wireless communication unit.
In one embodiment, the monitored environment is a plant comprising a plurality of rooms. The LED light bars may be disposed between the wall and the floor of each room (as shown in fig. 2). The sensing nodes are arranged at two ends of the LED light bar. The infrared sensors are arranged on two sides of an outlet of a room and used for detecting whether people escape from the room.
In this embodiment, the monitored environment is provided with the camera, and the camera is configured to capture video information of the monitored environment and send the video information to the server. For example, as shown in FIG. 3, the camera is mounted in a top position corner of the room. In one embodiment, the camera may be a ball camera or a gun camera. In other embodiments, the camera may also be an infrared camera. The infrared camera detects infrared heat through non-contact and converts the infrared heat into a thermal image and/or a temperature value to detect whether a fire condition exists in a monitored environment. The infrared camera can accurately quantify the detected heat, and accurately identify and analyze the heating dangerous area. The environmental parameter may comprise the thermal image.
In this embodiment, the LED light bar may indicate the user through different graphics. For example, when the LED light bar presents an arrow as shown in FIG. 4A, the user is instructed to walk to the left; when the LED light bar presents an arrow as shown in FIG. 4B, the user is instructed to walk to the right; when the LED light bar presents an arrow as shown in FIG. 4C, the user is indicated to move in the opposite direction; the LED light bar presents a fork icon as shown in fig. 4D, indicating that the user is not approaching. The LED light bar can also flicker with different frequencies according to the oxygen concentration in the monitored environment detected by the oxygen concentration sensor. For example, if the oxygen concentration in the monitored environment is greater than or equal to a first preset concentration (e.g. 21%), indicating that the oxygen concentration in the monitored environment is rich, the user may be reminded that the oxygen concentration in the monitored environment is sufficient by blinking at a low frequency (f ═ 0.5 Hz). If the oxygen concentration in the monitored environment is smaller than the first preset concentration and larger than the second preset concentration (15%), indicating that the oxygen concentration in the monitored environment is general, the user may be reminded of the general oxygen in the monitored environment through the blinking of the medium frequency (f ═ 1 Hz). If the oxygen concentration in the monitored environment is less than the second preset concentration and greater than or equal to a third preset concentration (11%), indicating that the oxygen concentration in the monitored environment is insufficient, the user may be reminded of the lack of oxygen in the monitored environment through a high-frequency (f ═ 2Hz) flash. If the oxygen concentration in the monitored environment is less than the third preset concentration, it indicates that the oxygen concentration in the current monitored environment is rare, and the user can be reminded of the oxygen deficiency in the current monitored environment through the flickering with the highest frequency (f ═ 3 Hz).
In the present embodiment, the mobile terminal 2 includes, but is not limited to, a communication module 20 and a display 21. The above elements are electrically connected with each other. The mobile terminal 2 may be a mobile phone, a tablet computer, or a wearable device.
In this embodiment, the communication module 20 is configured to provide wired or wireless network communication for the mobile terminal 2. For example, the mobile terminal 2 is connected to the server 1 via the communication module 20 in a wireless network.
In this embodiment, the wired network may be any type of conventional wired communication, such as the internet, a local area network. The Wireless network may be of any type of conventional Wireless communication, such as radio, Wireless Fidelity (WIFI), cellular, satellite, broadcast, etc.
In the present embodiment, the Display screen 21 may be a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen. The display screen 21 is used for displaying information such as an electronic map. The display screen 21 may have a touch function.
In this embodiment, the position information of the mobile terminal 2 may be implemented by an indoor positioning technology. The indoor positioning technology comprises at least one of a radio frequency signal positioning technology, a sensor-based positioning technology, an ultra-bandwidth positioning technology and an LED visible light positioning technology. The mobile terminal 2 is connected with the server 1 through a communication module 20 in a wireless network, and the mobile terminal 2 can send the positioned position information to the server 1.
As shown in fig. 5, a flow chart of a fire escape guidance method according to a preferred embodiment of the present invention is shown. The order of the steps in the flow chart may be changed, and some steps may be omitted or combined according to different requirements.
And step S1, receiving video information sent by the camera installed in the monitored environment.
In this embodiment, a camera is installed in the monitored environment, and the camera is in communication connection with the server. The camera can shoot the video information of the monitored environment in real time, and the video information is bound with the position information of the camera and then sent to the server.
And step S2, determining the fire location according to the video information.
And after receiving the video information, the server performs image processing on the video information through an image processing technology to judge whether flame or smoke occurs in the video information. And if the video information is confirmed to have flame or smoke, determining that a fire disaster occurs in the monitored environment, and confirming the position of the fire disaster according to the position information of the camera bound by the video information. It should be noted that, the technology of performing image processing on the video information by using an image processing technology and determining whether flame or smoke occurs in the video information is the prior art, and is not described herein again.
In step S3, it is determined whether or not there are a plurality of fire locations. If the fire location is one, the process goes to step S4; if there are a plurality of fire locations, the flow proceeds to step S5.
And step S4, generating at least one escape path according to the fire position and the LED light bars deployed in the monitored environment.
In this embodiment, the method of generating the at least one escape path comprises: establishing all connection nodes based on the sensing nodes on the LED light bars, and setting a hierarchy corresponding to the connection nodes; and generating at least one escape path according to all the established connection nodes and the corresponding hierarchies. Specifically, the generating of the escape path according to all the established connection nodes and the corresponding hierarchies includes: taking the exit position as the end point of the escape path; searching a connection node corresponding to the sensing node on the LED light bar according to the end point; and generating the escape path according to a preset sequence (such as from small to large) according to the hierarchy corresponding to the connecting node.
It should be noted that, if at least two escape paths in the escape paths share one connection node, the shared connection node is added to the shortest escape path in the at least two escape paths.
In this embodiment, the fire escape guidance method further includes:
sending control information to control all the connection nodes, and controlling all the connection nodes to sequentially rescan target connection node in a preset range according to the level size, wherein the connection nodes and the target connection node are positioned in different escape paths;
responding to the connection node scanning to the target connection node, and adding the target connection node to the escape path where the connection node is located;
calculating a first length of an escape path where the connecting node is located and a second length of the escape path after the target connecting node is added;
comparing the first length and the second length;
if the second length is smaller than the first length, the direction of the target connecting node is changed, and the escape path where the connecting node is located is regenerated.
If the second length is larger than or equal to the first length, the direction of the target connecting node is not changed, and the escape path where the connecting node is located is reserved.
In another embodiment, the method of generating the at least one escape path comprises: taking the exit position as the end point of the escape path; scanning a connecting node within a preset range (such as 5 meters) by taking the terminal point as a center; generating a first escape path based on the destination and the connecting node; generating a second section of escape path by using the LED light bars corresponding to the connecting nodes; determining another connecting node on the LED light bar, generating a third section of escape path by using the LED light bar adjacent to the other connecting node, and repeating the steps until all the connecting nodes are found out, so as to obtain an Nth section of escape path; and generating the escape path based on the first escape path, the second escape path and the third escape path ….
In one embodiment, since the number of the connection nodes in the preset range may be scanned with the end point as the center, a plurality of escape paths may be generated. And if at least two escape paths share one connecting node when the plurality of escape paths are generated, adding the shared connecting node into the shortest escape path of the at least two escape paths.
In this embodiment, the method for establishing all connection nodes based on the sensing nodes on the LED light bar includes:
determining a plurality of sensing nodes based on exit positions in a monitored environment, and setting a hierarchy corresponding to the sensing nodes as a first hierarchy;
if adjacent wall-connected nodes exist in the plurality of sensing nodes, establishing a first connecting node based on the adjacent wall-connected nodes, and setting a hierarchy corresponding to the first connecting node as a second hierarchy;
searching all adjacent nodes of the first connecting node;
establishing a second connecting node based on the searched adjacent nodes, and setting a hierarchy corresponding to the second connecting node as a third hierarchy;
continuing to search all adjacent nodes of the second connecting node, establishing a third connecting node based on the searched adjacent nodes, and setting a hierarchy corresponding to the third connecting node as a third hierarchy;
and establishing an i +1 th connecting node based on the searched adjacent nodes until all the adjacent nodes of the established i connecting node are searched, and setting a hierarchy corresponding to the i +1 th connecting node as an i +1 th hierarchy, wherein i is a positive integer.
In this embodiment, the adjacent connected wall nodes describe sensing nodes located on the LED light bar of the same wall; the adjacent nodes describe sensing nodes at two ends of the same LED light bar, sensing nodes at the same position on different LED light bars and sensing nodes at two sides of the outlet.
Each LEB light bar transmits its length to the server by itself through a sensing node that measures the distance and angle at which surrounding sensing nodes are located. The server sets a preset starting time, and simultaneously and synchronously searches for the sensing nodes from all exit positions (different points D) in the monitored environment. And adding the found sensing nodes from different directions by taking the exit position as an initial position to form a plurality of node strings in sequence. And searching a new sensing node from the tail node of each node string, and adding the found new sensing node into the node string. Each Time a new node is found, the Time period (Time clock) taken is 1 second, which ensures that the hierarchy depth of each node in each node string is the same. When the sensor is used for scanning, if a plurality of new nodes are found, the sensor selects to join the new node with the shortest distance to the new node.
For example, as shown in fig. 6, with point D as an exit position, a connection node is established based on a sensing node on the LED light bar in the monitored environment, and the connection node is set to correspond to the connection nodeThe hierarchy includes: determining two adjacent connecting wall nodes as a first connecting node A based on the point D1And E1And two non-adjacent connecting wall nodes are first connecting nodes B1And C1And setting the first connection node A1And E1And a first connected node B1And C1The corresponding hierarchy is a first hierarchy; based on the adjacent wall connecting node A1And E1Establishing a second connecting node A2And E2And setting the second connection node A2And E2The corresponding level is the second level. Based on the non-adjacent connected wall node B1And C1Establishing a second connection node B2And C2And setting the second connection node B2And C2The corresponding hierarchy is a second hierarchy; searching for the second connected node B2And C2All neighboring nodes of the third connection node B, establishing a third connection node B based on the searched neighboring nodes3And C3', and setting said third connecting node B3And C3' the corresponding level is the third level.
After the connection nodes are established according to all the adjacent nodes, all the connection nodes use the sensor to scan the sensing nodes in the preset range again according to the level size in sequence. The third connecting node B3Scanning to a sensing node within a preset range (i.e., the third connecting node C)3') establishing a fourth connecting node B based on the scanned sensing node4(ii) a The second connection node C2Scanning to sensing node C in preset range3Calculating the two connection nodes C2And the scanned sensing node C3A first distance therebetween; determining the second connecting node C2With said second connecting node C2Adjacent node C of3' a second distance therebetween; comparing the first distance to the second distance; the first distance is smaller than the second distance according to the scanned sensing node C3Establishing a third connecting node C3. And setting the third connection node C3The corresponding hierarchy is a third hierarchy; searching for the third connection node C3And a fourth connection node C is established based on the searched adjacent nodes4And setting the fourth connection node C4The corresponding hierarchy level is a fourth hierarchy level; searching for the fourth connection node C4And establishing a fifth connection node C based on the searched neighboring nodes5And setting the fifth connection node C5The corresponding hierarchy level is a fifth hierarchy level; searching for the fifth connection node C5And establishing a sixth connection node C based on the searched neighboring nodes6And setting the sixth connection node C6The corresponding hierarchy level is the sixth hierarchy level. And generating four escape paths according to the first to sixth connecting nodes and the corresponding hierarchies:
D←A1←A2；
D←B1←B2←B3←B4；
D←C1←C2←C3←C4←C5←C6；
D←E1←E2；
wherein the arrow indicates the escape direction.
It should be noted that, in an embodiment, if the server analyzes and obtains that the fire spreads to a preset LED light bar according to the video information shot by the camera, the server sends control information to the preset LED light bar to control the preset LED light bar to display a "no-pass state". The server can change the escape path containing the preset LED light bar. For example, if the preset LED light bar has sensing nodes of other adjacent escape paths, the escape direction of the escape path is changed to a reverse direction to guide people to other adjacent escape path end points, so that people can escape from other escape paths. As shown in FIG. 7, A is replaced2Point of direction A1Is changed to A1Point of direction A2. And if the LED light bars are not provided with connecting nodes of other adjacent escape paths, controlling all the LED light bars behind the failed LED light bar to display a 'no-pass state'.
Step S5, determining the position with the largest fire in the fire positions as the starting point of the fire escape path, determining at least one escape path based on the starting point and the LED light bars deployed in the monitored environment, and then the flow goes to step S6.
In the embodiment, the position with the maximum fire is analyzed according to an image processing technology, the position with the maximum fire is taken as a starting point of a fire escape path, and at least one escape path is determined based on the starting point and LED light bars deployed in a monitored environment.
And step S6, receiving the oxygen concentration information and the length information of the LED light bar sent by the sensing node on the LED light bar.
Step S7, determining an optimal escape route based on the at least one escape route and the oxygen concentration information.
In this embodiment, after generating at least one escape route, the length of the escape route and the oxygen concentration of the environment where the escape route is located need to be considered to select the optimal escape route for the user. The oxygen concentration of the environment in which the escape path is located can be measured according to the sensing node on the escape path.
Specifically, the method for determining the optimal escape path comprises the following steps: calculating the length of the at least one escape path; calculating the reliability of the escape route based on the length, the oxygen concentration and a hierarchy corresponding to a connection node on the escape route; and selecting the escape path with the highest reliability as the optimal escape path.
Calculating the reliability K of the escape path by the following formula1：
Wherein, W1、W2And W3The weight value is D, the length of the escape path is L, the level corresponding to the connecting node is L, and the oxygen concentration is N.
Step S8, generating indication information for controlling the LED light bar based on the optimal escape path;
in this embodiment, the indication information includes an escape direction and an oxygen concentration reminder. For example, the escape direction is indicated by an arrow, and the oxygen concentration is indicated by the blinking frequency.
And step S9, sending the indication information to the LED light bar.
In this embodiment, the LED light bar controls the direction of the displayed arrow and the frequency of the blinking according to the indication information.
In an embodiment, the method further comprises: and sending the optimal escape path to the mobile terminal in a preset information format. And after receiving the at least one escape path, the mobile terminal also receives LED length information and oxygen concentration information sent by sensing nodes of the LED light bars, and determines an optimal escape path based on the at least one escape path and the oxygen concentration information. The method for determining the optimal escape path is the same as the method for determining the optimal escape path by the server, and is not described herein again.
In this embodiment, the preset information format is { node name, angle direction, distance between nodes }. For example, escape route D ← a1←A2The corresponding information format is { D, +90 °, [2.2 ]]，A1，0°，[2.8]，A2}；
Escape route D ← B1←B2←B3←B4The corresponding information format is { D, -65 °, [0.6 ]]，B1，0°，[0.9]，B2，-90°，[1.4]，B3，-90°，[0.3]，B4}；
Escape route D ← C1←C2←C3←C4←C5←C6The corresponding information format is { D, -75 °, [0.8 ]]，C1，+90°，[1.2]，C2，+45°，[2.8]，C3，-90°，[0.3]，C4，-90°，[0.3]，C5，-90°，0.3]，C6}；
Escape route D ← E1←E2The corresponding information format is { D, -90 °, [2.3 ]]，E1，0°，[2.8]，E2}。
In one embodiment, the server 1 may send the escape route to the escape route with the shortest total length among the at least one escape route to the mobile terminal 2. And after the mobile terminal 2 obtains the current position information through an indoor positioning technology, displaying the position information in an electronic map of the monitored environment. And then the guide directions of the sensing nodes on the two sides of the LED light bar are displayed in a display screen according to the escape path. So as to be convenient for checking the whole escape path and the direction to escape in real time.
If the current position of the mobile terminal 2 is located at the junction of the last nodes of the node string formed by more than two escape routes, the reliability of the escape routes is calculated through the oxygen concentration, the route length node hierarchy and the weight, and the escape routes with higher reliability are selected for direction guidance. The method for calculating the reliability of the escape path is as described above, and is not described herein again.
It should be noted that, in another embodiment, if a reliable escape path cannot be determined according to the fire position and the LED light bars deployed in the monitored environment, the fire prevention reliability of all rooms in the monitored environment may be calculated first; determining a target room with highest fireproof reliability; generating a safety path from the fire location, the target room, and LED light bars deployed in the monitored environment. And generating indication information for controlling the LED light bar based on the safety path, and sending the indication information to the LED light bar to help the user smoothly arrive at the target room to wait for rescue of a rescuer.
In the present embodiment, the fire protection reliability K of all rooms in the monitored environment is calculated by the following formula2：
Wherein, WiIs a weight value, S represents the flame-retardant grade of the material of the internal compartment of the room, F represents the flame-retardant grade of the material of the floor of the room, and D represents the material of the door panel of the roomC represents whether the curtain of the room is made of fireproof material, out (O) represents whether the room has a window, L1Indicating the user's floor in the monitored environment, L2Represents the floor of the fire location in the monitored environment, M represents all floors of the monitored environment, d represents the horizontal distance of the target room from the fire location, R1Represents the length, R, of the target room2Representing the width of the target room.
In one embodiment, when the flame resistance level of the material of the internal compartment of the room is one grade, S is 0.9; when the flame resistance grade of the material of the internal compartment of the room is two-grade, S is 0.3; and when the flame resistance grade of the material of the internal compartment of the room is three grades, S is 0.1. When the flame-retardant grade of the floor material of the room is consistent with that of the material of the internal compartment, the corresponding F value is the same as the S value; when the flame-retardant level of the door plate material of the room is consistent with that of the material of the internal compartment, the corresponding value of D is the same as that of S; when the curtain is made of fireproof materials, C is 0.9; when the curtain is made of non-fireproof materials, C is 0.9; o out (O) 0.9 when there is an external window in the room; out (o) 0 when the room has no external window.
The flame resistance rating is described as one grade: the fire is not easy to generate a burning phenomenon in the initial stage of the fire, and the smoke generating coefficient per unit area is lower than 30. The flame resistance rating is described in two stages as: little combustion occurs at the beginning of a fire, and the smoke generation coefficient per unit area is less than 60. The flame resistance rating is described by three levels: only a slight amount of combustion occurs at the initial stage of a fire, and the smoke generation coefficient per unit area is less than 120. The calculation formula of the smoke generation coefficient is as follows:
CA＝240log10(I0/I)
wherein, I0Is the light intensity (Lux) at the beginning of the heating experiment, and I is the minimum value of the light intensity in the heating experiment.
The material with the first-grade flame-retardant grade comprises concrete, bricks or hollow bricks, tiles, stones, steel, aluminum, glass fiber, mineral wool, ceramics, mortar, lime and the like; the flame-retardant grade is a second grade material comprising a wood wool cement board, a flame-retardant gypsum board and the like; the flame-retardant grade is three-grade material, including flame-retardant plywood, flame-retardant fiberboard, flame-retardant plastic board and gypsum board, etc.
In order to facilitate understanding of the above fire escape guiding method, the following embodiments will be described. Fig. 8 is a schematic plan view of the monitored environment. The monitored environment map includes a plurality of rooms, e.g., an outer packing room, an inner packing room, an office, etc. LED light bars are pasted between the wall and the ground of each room, and sensing nodes are arranged at two ends of each LED light bar. As can be seen in fig. 8, the monitored environment includes two outlets D1 and D2. The connection node established according to the sensing node is An (indicated by a solid dot in the figure). As shown in fig. 9, four escape paths are generated according to the connection nodes. A first escape route: d1←A1←A2(ii) a A second escape route: d1←B1←B2(ii) a A third escape route: d2←X1←X2(ii) a A fourth escape route: d2←Y1←Y2The arrow in the figure indicates the escape direction.
Continue searching for connecting node A2、B2、X2And Y2Of the neighboring node. Find the connection node A2Of the neighboring node. Therefore, the first escape route can be continuously updated to D1←A1←A2←A3←A4←A5←A6. Finding said connection node Y2Of the neighboring node. Therefore, the fourth escape route can be continuously updated to D1←Y1←Y2←Y3←Y4←Y5. Due to the connection of node B2And X2Located at the door opening of the room, without adjacent nodes. Thus, at the connecting node B2And X2Searching for a connection node within the preset range. Finding a connecting node B2Connecting node B within a preset range3The second escape route is updated to D1←B1←B2←B3. As shown in fig. 10, the first escapeThe raw path may continue to be updated as: d1←A1←A2←A3←A4←A5←A6。
As shown in FIG. 11, connecting node X can also be found2Of adjacent node X3(ii) a Find connecting node A6Of a neighboring node A7And finding the connection node Y5Adjacent node Y of6. The first escape route may continue to be updated as: d1←A1←A2←A3←A4←A5←A6←A7(ii) a The third escape route can be updated as follows: d2←X1←X2←X3(ii) a And the fourth escape route may be updated as follows: d2←Y1←Y2←Y3←Y4←Y5←Y6。
By analogy, as shown in fig. 12, the four escape paths may be updated according to all the connection nodes in the monitored environment, as follows:
the first escape route is as follows: d1←A1←A2←A3←A4←A5←A6←A7←...←A14；
The second escape route is as follows: d1←B1←B2←B3←...←B12；
The third escape route is as follows: d2←X1←X2←X3←...←X8；
The fourth escape route is as follows: d2←Y1←Y2←Y3←Y4←Y5←Y6←Y7←...←Y16。
The server sends control information to all the connected nodes, and controls all the connected nodes to rescan the target connected nodes in the preset range according to the order of the hierarchy (as shown in B of FIG. 13)8And B9) (ii) a Connecting the target to a node B8And B9Adding the calculated escape routes into the first escape route to obtain six escape routes (as shown in fig. 14). As follows:
the first escape route is as follows: d1←A1←A2←A3←A4←A5←A6←A7←...←A14；
Updating the second escape route as follows: d1←B1←B2←B3←...←B7；
Updating the third escape route as follows: d1←A1←A2←A3←B8←B7；
Updating the fourth escape route as follows: d1←A1←A2←A3←B9←B10←B11←B12；
The newly added fifth escape route comprises the following steps: d2←X1←X2←X3←...←X8；
The newly added sixth escape route comprises the following steps: d2←Y1←Y2←Y3←Y4←Y5←Y6←Y7←...←Y16。
Fig. 5 is a detailed view illustrating a fire escape guidance method according to the present application, by which a fire escape speed can be increased. The functional modules and hardware device architecture for implementing the fire escape guiding device will be described with reference to fig. 15 and 16. It is to be understood that the embodiments are illustrative only and that the scope of the claims is not limited to this configuration.
Fig. 15 is a functional block diagram of a fire escape guidance device according to an embodiment of the present disclosure.
In some embodiments, the fire escape guidance device 100 may include a plurality of functional modules composed of program code segments. Program codes of respective program segments in the fire escape guidance device 100 may be stored in a memory of the server 1 and executed by at least one processor in the server 1 to implement a function of fire escape guidance.
Referring to fig. 15, in the present embodiment, the fire escape guidance device 100 may be divided into a plurality of functional modules according to the functions performed by the device, and the functional modules are used for performing the steps in the embodiment corresponding to fig. 5 to realize the function of fire escape guidance. In this embodiment, the functional modules of the fire escape guidance device 100 include: a receiving module 101, a determining module 102, a generating module 103, and a transmitting module 104.
The receiving module 101 is configured to receive video information sent by a camera installed in a monitored environment; the determining module 102 is configured to determine a fire location according to the video information; the generating module 103 is configured to generate at least one escape path according to the fire position, the exit position in the monitored environment, and the LED light bars deployed in the monitored environment; the receiving module 101 is further configured to receive oxygen concentration information and length information of the LED light bar sent by a sensing node on the LED light bar; the determining module 102 is further configured to determine an optimal escape route based on the at least one escape route and the oxygen concentration information; the generating module 103 is further configured to generate indication information for controlling the LED light bar based on the optimal escape path; the sending module 104 is configured to send the indication information to the LED light bar.
Fig. 16 is a schematic structural diagram of a vehicle according to an embodiment of the present application. The server 1 comprises a memory 11, a processor 12 and a communication bus 13, wherein the memory 11 is connected with the processor 12 in a communication mode through the communication bus 13.
The server 1 further comprises a computer program 14, such as a program for fire escape guidance, stored in the memory 11 and executable on the processor 12.
The steps of the fire escape guidance method in the embodiment of the method are realized when the computer program 14 is executed by the processor 12. Alternatively, the processor 12 executes the computer program 14 to realize the functions of the modules/units in the system embodiment.
Illustratively, the computer program 14 may be partitioned into one or more modules/units, which are stored in the memory 11 and executed by the processor 12 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, the instruction segments describing the execution process of the computer program 14 in the server 1. For example, the computer program 14 may be partitioned into modules 101 and 104 in FIG. 14.
It will be appreciated by those skilled in the art that the schematic diagram 15 is merely an example of the server 1 and does not constitute a limitation of the server 1, that the server 1 may comprise more or less components than those shown, or some components may be combined, or different components, for example, the server 1 may further comprise an input device, a network communication unit, etc.
The Processor 12 may be a Central Processing Unit (CPU), and may include other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the processor 12 is the control center of the server 1 and connects the various parts of the entire server 1 using various interfaces and lines.
The memory 11 may be used to store the computer program 14 and/or the module/unit, and the processor 12 implements various functions of the server 1 by running or executing the computer program and/or the module/unit stored in the memory 11 and calling data stored in the memory 11. The storage 11 may include an external storage medium and may also include a memory. In addition, the memory 11 may include a high speed random access memory, and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device. In the present embodiment, an electronic map is stored in the memory 12. The electronic map includes map information of the monitored environment and arranged LED light bar information. For example, the electronic map includes information on a corridor, an exit, and the like of an office building.
The modules/units integrated by the server 1 may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, all or part of the processes in the methods of the embodiments may be implemented by a computer program, which may be stored in a computer-readable storage medium and used by a processor to implement the steps of the embodiments of the methods. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (12)
1. A fire escape guiding method is applied to a server and is characterized by comprising the following steps:
receiving video information sent by a camera installed in a monitored environment;
determining the fire position according to the video information;
generating at least one escape path according to the fire position, the exit position in the monitored environment and the LED light bars deployed in the monitored environment;
receiving oxygen concentration information and length information of the LED light bar sent by a sensing node on the LED light bar;
determining an optimal escape route based on the at least one escape route and the oxygen concentration information;
generating indication information for controlling the LED light bar based on the optimal escape path;
and sending the indication information to the LED light bar.
2. A fire escape guidance method as claimed in claim 1, wherein said method of generating said at least one escape route includes:
establishing a connection node based on the sensing nodes on the LED light bars, and setting a hierarchy corresponding to the connection node;
and generating an escape path according to all the established connection nodes and the corresponding hierarchies.
3. A fire escape guidance method as claimed in claim 2, wherein said establishing connection nodes based on sensing nodes on the LED light bars and setting the levels corresponding to the connection nodes comprises:
determining a plurality of sensing nodes based on exit positions in a monitored environment, establishing a first connecting node based on the plurality of sensing nodes, and setting a hierarchy corresponding to the first connecting node as a first hierarchy;
searching all adjacent nodes of the first connecting node;
establishing a second connecting node based on the searched adjacent nodes, and setting a hierarchy corresponding to the second connecting node as a second hierarchy;
continuing to search all adjacent nodes of the second connecting node, establishing a third connecting node based on the searched adjacent nodes, and setting a hierarchy corresponding to the third connecting node as a third hierarchy;
and establishing an i +1 th connecting node based on the searched adjacent nodes until all the adjacent nodes of the established i connecting node are searched, and setting a hierarchy corresponding to the i +1 th connecting node as an i +1 th hierarchy, wherein i is a positive integer.
4. A fire escape guidance method as claimed in claim 2, wherein said generating an escape route according to all the established connection nodes and the corresponding hierarchy level comprises:
taking the exit position in the monitored environment as the end point of the escape path;
searching a connection node corresponding to the sensing node on the LED light bar according to the end point;
and generating the escape path according to a preset sequence according to the hierarchy corresponding to the connecting node.
5. The fire escape guidance method according to claim 4, wherein if at least two escape routes share a connection node, the shared connection node is added to the shortest escape route of the at least two escape routes.
6. The fire escape guidance method of claim 4, further comprising:
sending control information to all the connecting nodes, and controlling all the connecting nodes to re-scan target connecting nodes in a preset range according to the level size, wherein the connecting nodes and the target connecting nodes are located in different escape paths;
responding to the connection node scanning to the target connection node, and adding the target connection node to the escape path where the connection node is located;
calculating a first length of an escape path where the connection node is located, and calculating a second length of the escape path after the connection node is added to the target connection node;
comparing the first length and the second length;
if the second length is smaller than the first length, the direction of the target connection node is changed, and the escape path after the target connection node is added is regenerated.
7. The fire escape guidance method of claim 4, wherein the determining of the optimal escape route comprises:
calculating the length of the at least one escape path;
calculating the reliability of the escape route based on the length, the oxygen concentration and a hierarchy corresponding to a connection node on the escape route;
and selecting the escape path with the highest reliability as the optimal escape path.
8. A fire escape guidance method as claimed in claim 7, wherein the reliability R1 of the escape route is calculated by the following formula:
wherein, W1、W2And W3The weight value is D, the length of the escape path is L, the level corresponding to the connecting node is L, and the oxygen concentration is N.
9. A fire escape guidance method as claimed in any one of claims 1 to 8, further comprising:
if the escape path cannot be determined according to the fire position and the LED light bars deployed in the monitored environment, calculating the fireproof reliability of all rooms in the monitored environment;
determining a target room with highest fireproof reliability;
generating a safety path from the fire location, the target room, and LED light bars deployed in the monitored environment.
10. The fire escape guidance method according to claim 9, wherein the fire protection reliability K of all rooms in the monitored environment is calculated by the following formula2：
Wherein, WiIs a weighted value, S represents the flame-retardant level of the material of the compartment in the room, F represents the flame-retardant level of the material of the floor in the room, D represents the flame-retardant level of the material of the door plate in the room, C represents whether the curtain in the room is made of fireproof material, O represents whether the room has a window to the outside, L1Indicating the user's floor in the monitored environment, L2Represents the floor of the fire location in the monitored environment, M represents all floors of the monitored environment, d represents the horizontal distance of the target room from the fire location, R1Represents the length, R, of the target room2Representing the width of the target room.
11. A server, characterized in that the server comprises:
a processor; and
a memory in which a plurality of program modules are stored, the program modules being loaded by the processor and executing the fire escape guidance method according to any one of claims 1 to 10.
12. A storage medium having at least one computer instruction stored thereon, wherein the instruction is loaded by a processor and performs the fire escape guidance method according to any one of claims 1 to 10.
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