Evacuation guidance display system, evacuation guidance display method, program, and disaster prevention system

Abstract

An evacuation guidance presentation system (10) provides evacuation guidance by presenting an evacuation route when a fire occurs in a facility, and is provided with: a calculation unit (11) that calculates, for each unit space of a plurality of unit spaces that virtually divide a facility, a spatial risk value for the unit space on the basis of a function of the time it takes for smoke to reach the unit space from the point where a fire occurs; a determination unit (12) that determines an optimal evacuation route, which is the evacuation route for which the sum of the spatial risk values for one or more unit spaces passed through in the evacuation route is the smallest among a plurality of evacuation routes in the facility; and a presentation unit (13) that presents the evacuation route determined as the optimal evacuation route by the determination unit (12).

Description

[Technical Field]

[0001] This invention relates to an evacuation guidance display system, an evacuation guidance display method, a disaster prevention system including an evacuation guidance display system, and a program. [Background technology]

[0002] Conventionally, in the event of a disaster such as a fire, technologies have been developed to support the safe evacuation of disaster victims by automatically generating evacuation routes (also called evacuation paths) (see, for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2010-5292 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] However, conventional evacuation support technologies sometimes generated inappropriate evacuation routes. The present invention provides an evacuation guidance and presentation system that supports safer evacuation by generating and presenting more appropriate evacuation routes. [Means for solving the problem]

[0005] An evacuation guidance presentation system according to an aspect of the present invention is an evacuation guidance presentation system that performs evacuation guidance by presenting an evacuation route in the event of a fire in a facility. In each of a plurality of unit spaces that virtually partition the facility, an arithmetic unit that calculates a spatial risk value of the unit space based on a function of the time it takes for smoke to reach the unit space from the fire occurrence point, a determination unit that determines an optimal evacuation route, which is an evacuation route among a plurality of evacuation routes in the facility and has the smallest sum of the spatial risk values of one or more of the unit spaces passed through in the evacuation route, and a presentation unit that causes the evacuation route determined as the optimal evacuation route by the determination unit to be presented.

[0006] An evacuation guidance presentation method according to an aspect of the present invention is an evacuation guidance presentation method executed by a computer for performing evacuation guidance by presenting an evacuation route in the event of a fire in a facility. In each of a plurality of unit spaces that virtually partition the facility, a spatial risk value of the unit space is calculated based on a function of the time it takes for smoke to reach the unit space from the fire occurrence point, an optimal evacuation route, which is an evacuation route among a plurality of evacuation routes in the facility and has the smallest sum of the spatial risk values of one or more of the unit spaces passed through in the evacuation route, is determined, and the evacuation route determined as the optimal evacuation route is presented.

[0007] A program according to an aspect of the present invention is a program for causing a computer to execute the evacuation guidance presentation method described above.

[0008] A disaster prevention system according to an aspect of the present invention includes the evacuation guidance presentation system described above and the plurality of sensors provided in the facility.

Advantages of the Invention

[0009] According to the present invention, an evacuation guidance presentation system or the like that supports evacuation more safely is provided.

Brief Description of the Drawings

[0010] [Figure 1] FIG. 1 is a block diagram showing the functional configuration of the evacuation guidance presentation system in the embodiment. [Figure 2] FIG. 2 is a flowchart showing an example of the operation of the evacuation guidance presentation system in the embodiment. [Figure 3] FIG. 3 is a diagram for explaining the time when smoke reaches in the embodiment. [Figure 4] FIG. 4 is a diagram for explaining the determination of the optimal evacuation route in the embodiment. [Figure 5] FIG. 5 is a diagram showing an example of the presentation of the evacuation route in the embodiment.

Mode for Carrying Out the Invention

[0011] Hereinafter, the embodiments will be specifically described with reference to the drawings. Note that each of the embodiments described below shows general or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, order of steps, etc. shown in the following embodiments are merely examples and are not intended to limit the present invention. In addition, among the components in the following embodiments, the components not described in the independent claims are described as optional components.

[0012] Note that each figure is a schematic diagram and is not necessarily drawn precisely. Also, in each figure, the same reference numerals are given to substantially the same configurations, and duplicate explanations may be omitted or simplified. )]]

[0013] (Embodiment)<( First, an overview of the evacuation guidance display system and disaster prevention system according to the embodiment will be described. The disaster prevention system in the present invention is a system that detects the occurrence of a disaster such as a fire from the detection results of sensors installed in the facility, and uses the time it takes for smoke to reach from the point of fire to present an evacuation route from the current floor to outside the floor and guides the person to evacuate. In other words, the disaster prevention system is a system that generates and outputs an appropriate evacuation route based on the time it takes for smoke to reach. Here, the disaster prevention system and evacuation guidance display system in the present invention do not consider movement between floors. Movement between floors means, for example, moving from the second floor to the first floor. In the present invention, an evacuation route is generated from the floor where the victim is currently located to outside the floor, that is, from the current location on the floor to the emergency staircase or emergency exit (including a connecting passage to another floor on the same floor indoors, or an exit to the outside) provided on that floor. Hereinafter, the emergency staircase or emergency exit will be collectively referred to as an exit from the floor, or simply as an exit.

[0014] The evacuation guidance system, in generating evacuation routes, comprehensively assesses the risk level of all routes from the current location to the exit and determines the route with the lowest risk, i.e., the optimal evacuation route. Therefore, for each of the multiple evacuation routes from the current location to the exit, the system calculates the risk level of the entire route and presents the route with the lowest risk. This is a different concept from simply selecting the route with the lower risk level at a branching point in the evacuation route from the current location. This point will be explained in more detail later.

[0015] Figure 1 is a block diagram showing the functional configuration of the evacuation guidance display system in the embodiment. As shown in Figure 1, the evacuation guidance display system 10 is incorporated into the disaster prevention system 50 as part of the disaster prevention system 50. The function of the evacuation guidance display system 10 is to generate an evacuation route from the time it takes for smoke to reach the fire source and to display it on the guidance UI 22. In other words, the evacuation guidance display system 10 is responsible for the information processing part for displaying evacuation routes in the disaster prevention system 50.

[0016] The disaster prevention system 50 includes a sensor 21 and a guidance UI 22 in addition to the evacuation guidance display system 10. The disaster prevention system 50 may also be implemented as a system consisting only of the evacuation guidance display system 10 and the sensor 21, which are connected to an external guidance UI device, or as a system consisting only of the evacuation guidance display system 10 and the guidance UI 22, which are connected to an external sensor device.

[0017] The sensors 21 included in the disaster prevention system 50 include, for example, smoke detectors and heat detectors that sense smoke concentration values ​​during a fire, detectors for predetermined component concentrations such as carbon monoxide or carbon dioxide, image sensors such as cameras that detect the presence or absence of fire or collapse, seismic intensity detectors that sense seismic intensity during an earthquake, and illuminance detectors for quantifying the visibility of evacuation routes. Hereinafter, the sensor 21 will be described as a detector that senses smoke concentration values.

[0018] Furthermore, the guidance UI 22 included in the disaster prevention system 50 may be composed of any device that can present an evacuation route (i.e., inform disaster victims) by presenting at least one of auditory information and / or visual information. The guidance UI 22 may include, for example, an audio output speaker, a light-flashing driving guidance device (a device in which multiple light points emit light at different times, making it appear as if the light is moving in the direction of guidance), and an image display device such as a digital signage or tablet terminal.

[0019] The evacuation guidance display system 10 includes a calculation unit 11, a determination unit 12, and a display unit 13. The evacuation guidance display system 10 is implemented by a computer that performs the functions of the information processing part as described above. The evacuation guidance display system 10 may be implemented, for example, by a virtual cloud computer built on a network, or by an edge computer installed in the facility or another facility connected to the facility by a communication line.

[0020] The calculation unit 11 acquires detection results from the sensor 21 and calculates a spatial hazard value indicating the hazard level of the space traversed by the evacuation route, based on the time it takes for smoke to reach the fire source. More specifically, when the entire floor of a facility is virtually divided into multiple spaces, the evacuation route is configured to pass through some of these divided spaces (hereinafter referred to as "unit spaces"). Conversely, the evacuation route includes multiple unit spaces that are traversed along the route. Sensors 21 are provided in multiples, one for each unit space, so that detection is possible in each unit space. Furthermore, sensors 21 are configured to be able to sense within each unit space. In other words, a unit space corresponds to the area detectable by the sensor 21. There are no particular limitations on the size of the unit space or its positional relationship with the sensor 21, but for example, a unit space may correspond to a detection area defined by the Fire Service Act, or a unit space may correspond to a 30m x 30m area corresponding to the standard for installing detectors in corridors and passages defined by the Fire Service Act.

[0021] On the other hand, it is not essential to provide sensors 21 in each unit space. For example, only sensors 21 capable of sensing at the fire outbreak site may be provided, and sensors 21 may not be provided in other unit spaces. If it is possible to identify locations where fires are likely to occur, sensors 21 may be provided only at those locations, and sensors 21 may not be provided at other locations. However, if it is not possible to identify locations where fires are likely to occur, sensors 21 may be provided at all locations (i.e., all unit spaces).

[0022] The spatial hazard value is calculated from the time it takes for smoke to reach a single unit space from the point of fire outbreak, and is a numerical value indicating the degree of danger to a person passing through that unit space. Since the spatial hazard value changes moment by moment, it may be calculated as an estimated value of the time (i.e., in the future) when a person is likely to pass through, for example, using the spatial hazard value at that moment and past spatial hazard values. As described above, each unit space is individually equipped with a sensor 21, and the calculation unit 11 calculates the spatial hazard value using each of the multiple sensors 21. A communication line is formed between the calculation unit 11 and the sensors 21 to exchange the detection results of the sensors 21. In addition to the calculation unit 11 and the sensors 21, other devices such as transceivers and gateways may be interposed in this communication line.

[0023] The calculation unit 11 calculates a spatial hazard value using an algorithm based on the time it takes for smoke to reach the acquired fire origin. A detailed explanation of the operation of the calculation unit 11 will be described later, along with an explanation of the operation of the evacuation guidance presentation system 10.

[0024] The determination unit 12 uses the spatial hazard value calculated by the calculation unit 11 to determine the optimal evacuation route from among multiple evacuation routes. Determining the optimal evacuation route means selecting the evacuation route from among multiple evacuation routes in which the sum of the spatial hazard values ​​of the unit spaces traversed by each evacuation route is smallest, calculated by totaling the spatial hazard values ​​of all unit spaces included in that evacuation route, i.e., the total spatial hazard values ​​across all routes.

[0025] The presentation unit 13 causes the guidance UI 22 to present the evacuation route determined to be the optimal evacuation route by the determination unit 12. In this example, the presentation of the evacuation route is described as being done by image, but as described above, the presentation unit 13 should be appropriately configured according to the manner in which the evacuation route is presented. The presentation unit 13 obtains information on the evacuation route determined to be the optimal evacuation route, overlays it on a floor map that is stored in advance (stored in a memory unit, etc.), and generates an image. Then it outputs the generated image and displays it on the guidance UI 22. A communication line is formed between the presentation unit 13 and the guidance UI 22 to exchange the generated image. In addition to the presentation unit 13 and the guidance UI 22, other devices such as transceivers and gateways may be interposed in this communication line.

[0026] Next, with reference to Figure 2, the operation of the disaster prevention system 50, and in particular the evacuation guidance display system 10, will be described. Figure 2 is a flowchart showing an example of the operation of the evacuation guidance display system in the embodiment.

[0027] First, the sensor 21 constantly senses the smoke concentration value and transmits it to the calculation unit 11. The calculation unit 11 acquires the smoke concentration value as a detection result (S101) and calculates the spatial hazard value of the unit space in which the sensor 21 is installed at that time as a function of the smoke arrival time (S102). The calculation of the spatial hazard value will now be explained with reference to Figure 3.

[0028] In this embodiment, the calculation unit 11 calculates the spatial hazard value based on the smoke tip velocity u at the fire outbreak site. f It is calculated based on the path length in the smoke propagation path from the point of origin of the fire. Specifically, as shown in Figure 3, smoke is generated at a predetermined amount from the point of origin of the fire, and that smoke propagates horizontally along the ceiling. The smoke leading velocity u at that time f This can be calculated using the following formula (1).

[0029]

number

[0030] In equation (1), Δρ is the density difference between the smoke and the surrounding fluid (unit: kg / m³). 3 ) indicates, g indicates the acceleration due to gravity, and Q0 is the amount of smoke flowing in at the point of fire (unit: m 3 / s) indicates ρ s This is smoke density (unit: kg / m³). 3 ) indicates, and b indicates the width of the passage (in meters).

[0031] In this embodiment, the evacuation route presented is one that passes only through corridors and does not go through living rooms. This is because it is rare for an evacuation route to require the use of a living room, which is likely to become a dead end, and because a wall is usually provided between the ceiling and the door / window at the boundary between a living room and a corridor. Therefore, in order to calculate the spatial hazard value of a living room, it is necessary to consider that the smoke height will decrease by the amount of the wall, and in order to consider such a situation, information about the three-dimensional space of the facility is required. If this is done, the amount of computational processing required will suddenly become enormous. In other words, from the perspective of computational processing, it is effective to calculate an evacuation route that passes only through corridors.

[0032] According to the above reasoning, the passage width b of a route can be calculated using a constant width, such as a representative value of the passage width within the route being calculated, for example, the average value of width b1, since there are no routes where the passage width changes drastically, like doorways to living spaces. Also, smoke density ρ s Furthermore, the density difference Δρ between the smoke and the surrounding fluid can be approximated as a nearly constant if a strict treatment is not required. (Passage width b, smoke density ρ) sIt is also possible to calculate the density difference Δρ between the smoke and the surrounding fluid as an exact numerical value. However, from the perspective of the amount of calculation processing as described above, it is preferable that these variables are approximated as constants. Furthermore, in the present embodiment, since the spatial risk value is calculated based on the smoke tip velocity at the fire occurrence point and the path length and passage width in the smoke propagation path, the influence in the height direction of the smoke is not considered. As a result, the spatial risk value can be calculated without using the information of the three-dimensional space of the floor, and it is possible to significantly reduce the amount of calculation processing. In an emergency situation such as evacuation from a fire, every moment is crucial, so there may be no room for large-scale calculations with a large processing amount. It can be said that the evacuation route with a reduced amount of calculation processing conforms to the actual situation.

[0033] As described above, using the representative value (for example, width b1) as the passage width, the smoke density ρ s and approximating the density difference Δρ between the smoke and the surrounding fluid as a constant, Equation (1) can be transformed into an equation showing that the smoke tip velocity u f is proportional to the cube root of the passage width b1 and the smoke inflow rate Q0. Hereinafter, the smoke tip velocity u f is treated as being the same as the horizontal propagation velocity of the smoke. Therefore, the horizontal propagation velocity of the smoke is proportional to the cube root of the smoke inflow rate Q0.

[0034] On the other hand, as factors that have a large influence and cannot be ignored on the horizontal propagation velocity of the smoke in the path, there are branch paths of the path involved in the discharge of the smoke, and smoke exhaust mechanisms such as smoke exhaust devices and ventilation devices. For example, when there is a branch path on the path from the fire occurrence point to the target unit space, since the smoke is also distributed to the path after the branch, the horizontal propagation velocity of the smoke is reduced. Or, when there is a confluence path from another path on the path from the fire occurrence point to the target unit space, since the smoke from other paths is confluent, the horizontal propagation velocity of the smoke is increased. In the present embodiment, the arithmetic unit 11 increases or decreases the horizontal propagation velocity according to such branch paths and confluence paths.

[0035] Specifically, if there is a branch path on the route from the fire source to the target unit space, the calculation unit 11 assumes that the passage width has increased by the amount of the branched path and replaces b in equation (1) to calculate. For example, if smoke is distributed to another path with the same passage width at the branch path, the calculation unit 11 replaces the smoke inflow amount from Q0 to Q0 / 2 and calculates equation (1) to calculate the horizontal propagation velocity. Similarly, if there is a merging passage on the route from the fire source to the target unit space, the calculation unit 11 assumes that the passage width has decreased by the amount of the other merging path and replaces b in equation (1) to calculate. For example, if smoke is merged from another path with the same passage width at the branch path, the calculation unit 11 replaces the smoke inflow amount from Q0 to 2Q0 and calculates equation (1) to calculate the horizontal propagation velocity.

[0036] On the other hand, if a smoke exhaust mechanism exists along the path from the fire source to the target unit space, the horizontal propagation speed of smoke is reduced according to its performance and operating capacity, which is determined by its installation height, etc. The operating capacity is the amount of smoke reduction relative to the amount of smoke inflow, and Q E This is expressed as follows: Specifically, the calculation unit 11 calculates the operating performance Q of the smoke exhaust mechanism if such a mechanism exists along the path from the fire source to the target unit space. E Assuming that the amount of smoke inflow has decreased by that amount, the calculation is performed by subtracting Q0 from equation (1). For example, the calculation unit 11 calculates the operating performance Q E If a smoke exhaust mechanism is present in the path, Q0 is (Q0-Q E Equation (1) is used to calculate the horizontal propagation velocity.

[0037] Here, the smoke inflow Q0 can be considered as the amount of smoke generated only at the point of origin of the fire, such as in the initial stages of a fire when there are no other sources of smoke. This amount of smoke is defined by the following equation (2) V s It is calculated using the value.

[0038]

number

[0039] In equation (2), α f This refers to the amount of flammable material stored in the space containing the fire (hereinafter referred to as a living room) within 1 m³ 2 Heat generation per unit q l The values ​​shown correspond to the amount of heat generated (q). l 170 (mJ / m 2 ) In the following cases, α f = 0.0125, and the heat generation q l 170 (mJ / m 2 If it is greater than α, f = 2.6 × 10 -6 q l ^(5 / 3).

[0040] Also, in equation (2), α m This value is determined by the type of finish used on the interior-facing parts of the walls and ceilings of the room, including the point where the fire started. If the walls and ceilings are finished with non-combustible materials, then α m = 0.0035, and if the walls and ceilings are finished according to Article 128-5 (Interior finish of special buildings, etc.) Paragraph 1, Item 2 of the Building Standards Act Enforcement Order, then α m = 0.014, and if the walls and ceilings are finished according to Article 128-5 (Interior finish of special buildings, etc.) Paragraph 1, Item 1 of the Building Standards Act Enforcement Order, then α m = 0.056, and if the walls and ceilings are finished with wood or similar materials, α m = 0.35.

[0041] Also, in equation (2), A room This refers to the floor area of ​​the living space (unit: m²). 2 ) indicates H low This indicates the average ceiling height (in meters) from the lowest point of the floor surface in the living space. room This indicates the average ceiling height (in meters) from the reference point of the living space.

[0042] Calculated V s The value can be treated directly as the amount of smoke emitted, but it may differ from the amount of smoke estimated from the detection results detected by the sensor 21, etc. Therefore, in this embodiment, V sAlong with the value, the amount of smoke to be used in the calculation is determined by considering the detection result. For example, V s If the detected smoke output is greater than the value, then V s By multiplying the value by a coefficient or adding a predetermined number, V s Determine the amount of smoke emitted that exceeds the value. Also, for example, V s If the detected smoke output corresponds to a smaller amount than the value, then V s By dividing the value by a coefficient or subtracting a predetermined number, V s Determine the amount of smoke emitted that is lower than the specified value.

[0043] As described above, V s The amount of smoke emitted is determined based on the values ​​and detection results, and equation (1) is calculated using the determined amount of smoke emitted as the smoke inflow amount Q0. In doing so, the calculation is performed while considering branching and merging paths along the path and the smoke exhaust mechanism, while reducing the amount of computation by treating as many approximateable variables as possible as constants, and the horizontal propagation velocity along the path is calculated. The calculation unit 11 uses the calculated horizontal propagation velocity and the path length of the path to calculate the time it takes for the smoke to reach a unit space. Since this time needs to be replaced with a spatial hazard value for the unit space, the calculation unit 11 also has a conversion function to replace the time it takes for the smoke to reach with a spatial hazard value. For example, the calculation unit 11 calculates the spatial hazard value by taking the reciprocal of the calculated time it takes for the smoke to reach. This conversion function is just one example, and the calculation unit 11 is not particularly limited in its conversion method as long as it has a conversion function that calculates a lower spatial hazard value when the time it takes for the given smoke to reach is long, and a higher spatial hazard value when the time it takes for the given smoke to reach is short.

[0044] Returning to Figure 2, after the spatial hazard value has been calculated, the determination unit 12 determines the optimal evacuation route (S103). First, the determination unit 12 acquires the calculated spatial hazard value. Then, using the spatial hazard value, it calculates the sum of the spatial hazard values ​​across all routes for each of the multiple possible evacuation routes. An example is explained using Figure 4. Figure 4 is a diagram for explaining the determination of the optimal evacuation route in the embodiment. In Figure 4, the outermost rectangle indicates a floor within the facility, and the hatched areas indicate impassable spaces (living rooms, storage spaces, etc.). S1 to S16 each indicate sensors. The floor has exits at the bottom edge of the page and on both the left and right sides of the page, and an evacuation route is presented that starts from the position of sensor S1 and heads towards one of the exits. The fire is occurring near sensor S4. The spatial hazard values ​​based on the time it takes for smoke to reach each unit space are as follows.

[0045] Near sensor S1: 0.020 Near sensor S2: 0.025 Near sensor S3: 0.200 Near sensor S4: 2.000 Near sensor S5: 0.020 Near sensor S6: 0.020 Near sensor S7: 0.030 Near sensor S8: 0.500 Near sensor S9: 0.015 Near sensor S10: 0.020 Near sensor S11: 0.025 Near sensor S12: 0.020 Near sensor S13: 0.005 Near sensor S14: 0.015 Near sensor S15: 0.020 Near sensor S16: 0.010

[0046] For example, the evacuation route indicated by the solid arrow in Figure 4 passes near sensors S1, S2, S6, S7, S11, S15, and S16. Therefore, the sum of the spatial hazard values ​​is 0.150. On the other hand, the evacuation route indicated by the dashed arrow in Figure 4 passes near sensors S1, S2, S6, S5, S9, S10, S11, S15, S14, and S13. Therefore, the sum of the spatial hazard values ​​is 0.185. At first glance, the evacuation route indicated by the dashed arrow, which selects the branch furthest from the vicinity of sensor S4, the source of the fire, seems to be the safest evacuation route. However, in reality, there is a lot of space that must be passed through before reaching the exit, and as a result, the sum of the spatial hazard values ​​is larger. In reality, even if it means getting closer to the vicinity of sensor S4, it is clear that evacuating via the evacuation route indicated by the solid arrow is less dangerous overall.

[0047] In this way, in this example, by comparing the sum of spatial hazard values ​​across all evacuation routes, it becomes possible to select a more appropriate evacuation route and support safer evacuations.

[0048] Returning to Figure 2, after determining the optimal evacuation route, the presentation unit 13 presents the evacuation route (S104). The presentation unit acquires information about the evacuation route determined to be the optimal evacuation route and generates an image for presenting the evacuation route by overlaying it on the floor map. Then, it outputs the image to the guidance UI 22 and displays it, thereby presenting the evacuation route. An example is shown in Figure 5. Figure 5 is a diagram showing an example of the presentation of an evacuation route in the embodiment. Figure 5 shows the appearance of the guidance UI 22 and the image displayed on the screen. As shown in Figure 5, in this example, along with the evacuation route overlaid on the floor map, the time of the fire, information identifying the location of the fire, an image of the current location, the number of victims trapped on the floor, and an inquiry button for contacting the floor manager are shown. For this reason, the system may also be configured to detect the occurrence of a fire, capture images, count the number of victims, register the floor manager, and form a communication line.

[0049] [Effects, etc.] As described above, the evacuation guidance presentation system 10 according to the first embodiment is an evacuation guidance presentation system 10 that provides evacuation guidance by presenting evacuation routes in the event of a fire in a facility, and comprises: a calculation unit 11 that calculates a spatial hazard value for each of a plurality of unit spaces that virtually partition the facility based on a function of the time it takes for smoke to reach the unit space from the point of origin of the fire; a determination unit 12 that determines the optimal evacuation route, which is the evacuation route in which the sum of the spatial hazard values ​​of one or more unit spaces traversed by the evacuation route is smallest among a plurality of evacuation routes in the facility; and a presentation unit 13 that presents the evacuation route determined to be the optimal evacuation route by the determination unit 12.

[0050] According to this, from among several candidate evacuation routes, the evacuation route with the smallest sum of spatial hazard values ​​for one or more unit spaces traversed before reaching the exit can be presented, based on the time it takes for smoke to reach each unit space, in terms of spatial hazard value, that is, the hazard level for each unit space. In this way, an evacuation guidance presentation system 10 that supports safer evacuation can be realized from the perspective of reducing the overall hazard level of the evacuation route. Furthermore, to calculate the spatial hazard value, only the time it takes for smoke to reach each unit space, that is, the speed of the smoke and the path length of the smoke propagation path, needs to be provided. Since this information can be obtained from a plan view from the floor, it is possible to suppress the increase in computational processing load that would otherwise be required by using information in three-dimensional space. As a result, the time required for computational processing is easily reduced, so evacuation routes can be presented quickly, and an evacuation guidance presentation system 10 that supports safer evacuation can be realized from the perspective of computational processing load as well.

[0051] Furthermore, the evacuation guidance presentation system 10 according to the second embodiment is the evacuation guidance presentation system 10 described in the first embodiment, wherein the calculation unit 11 acquires detection results from each of the multiple sensors 21 each provided in a unit space, and calculates the spatial risk value for each of the multiple unit spaces from the acquired detection results.

[0052] According to this, spatial hazard values ​​can be calculated based on detection results obtained from sensor 21. For example, when using estimated values ​​of smoke generation amount in calculating spatial hazard values, actual detection results can be used together with these estimated values, allowing for the presentation of evacuation routes based on more reliable spatial hazard values.

[0053] Furthermore, the evacuation guidance display system 10 according to the third embodiment is the evacuation guidance display system 10 described in the second embodiment, and the sensor 21 is a detector.

[0054] According to this, the spatial risk level can be calculated based on the detection results obtained from the sensor 21.

[0055] Furthermore, the evacuation guidance display system 10 according to the fourth embodiment is the evacuation guidance display system 10 described in the second or third embodiment, wherein the calculation unit 11 calculates the amount of smoke at the fire source using the above formula (2) V s The determination is made based on the value and the amount of change in the acquired detection result over time, and the spatial risk value for each of the multiple unit spaces is calculated based on the determined smoke emission amount.

[0056] According to this, V calculated by equation (2) s Based on the values ​​and the time-dependent changes in the acquired detection results, the amount of smoke emitted can be determined, and a spatial hazard value can be calculated based on that amount of smoke.

[0057] Furthermore, the evacuation guidance presentation system 10 according to the fifth embodiment is the evacuation guidance presentation system 10 described in any one of the first to fourth embodiments, wherein the calculation unit 11 calculates the time it takes for the smoke to arrive based on the path length and horizontal propagation speed of the path through which the smoke propagates from the fire source to the unit space, and the horizontal propagation speed is proportional to the cube root of the amount of smoke emitted at the fire source.

[0058] According to this method, the time it takes for smoke to reach a location can be calculated using the path length and horizontal propagation velocity of the smoke's path from the fire's origin to the unit space in question.

[0059] Furthermore, the evacuation guidance display system 10 according to the sixth embodiment is the evacuation guidance display system 10 described in any one of the first to fifth embodiments, wherein each of the multiple evacuation routes is a route leading to an emergency staircase or outdoors.

[0060] This allows for the presentation of evacuation routes, which are routes leading to emergency stairwells or the outdoors.

[0061] Furthermore, the evacuation guidance display system 10 according to the seventh embodiment is the evacuation guidance display system 10 described in any one of the first to sixth embodiments, wherein the display unit 13 presents the optimal evacuation route using at least one of voice, flashing lights, or digital signage.

[0062] According to this, evacuation routes can be presented using at least one of the following: sound, flashing lights, or digital signage.

[0063] Furthermore, the evacuation guidance display system 10 according to the eighth embodiment is the evacuation guidance display system 10 described in the fifth embodiment, wherein the calculation unit 11 reduces the horizontal propagation speed according to the branching paths that exist on the path from the fire source to the unit space.

[0064] According to this, if a branching path that has the effect of reducing the horizontal propagation speed exists on the path from the fire source to the unit space in question, the horizontal propagation speed can be reduced in accordance with such circumstances.

[0065] Furthermore, the evacuation guidance display system 10 according to the ninth embodiment is the evacuation guidance display system 10 described in the fifth embodiment, wherein the calculation unit 11 reduces the horizontal propagation speed according to the smoke exhaust mechanism present on the path from the fire source to the unit space.

[0066] According to this, if a smoke exhaust mechanism that has the effect of reducing the horizontal propagation speed exists along the path from the fire source to the unit space in question, the horizontal propagation speed can be reduced in accordance with such circumstances.

[0067] Furthermore, the evacuation guidance presentation method according to the tenth embodiment is a computer-operated evacuation guidance presentation method for providing evacuation guidance in the event of a fire in a facility by providing evacuation routes, and calculates the spatial hazard value of each of the multiple unit spaces that virtually partition the facility based on a function of the time it takes for smoke to reach the unit space from the point of origin of the fire, determines the optimal evacuation route among the multiple evacuation routes in the facility which is the evacuation route that minimizes the sum of the spatial hazard values ​​of one or more unit spaces that pass through the evacuation route, and presents the evacuation route determined to be the optimal evacuation route.

[0068] According to this, it will have the same effect as the evacuation guidance display system 10.

[0069] Furthermore, the program relating to the 11th embodiment is a program that causes a computer to execute the evacuation guidance presentation method described in the 10th embodiment.

[0070] According to this, a computer can be used to achieve the same effect as the evacuation guidance display system 10.

[0071] Furthermore, the disaster prevention system according to the 12th embodiment comprises an evacuation guidance display system 10 described in any one of the second embodiment, the third embodiment, or the fourth to ninth embodiments that reference the second embodiment, and a plurality of sensors 21 installed in the facility.

[0072] According to this, a disaster prevention system 50 that has the same effect as the evacuation guidance display system 10 can be realized.

[0073] (Other embodiments) Although embodiments have been described above, the present invention is not limited to the embodiments described above.

[0074] For example, in the above embodiment, the evacuation guidance display system was implemented using multiple devices, modules, etc. In this case, the components of the evacuation guidance display system described in the above embodiment may be distributed among the multiple devices, modules, etc. in any way. Alternatively, the evacuation guidance display system may be implemented as a single device.

[0075] Furthermore, in the above embodiment, the processing performed by a specific processing unit may be performed by another processing unit. Also, the order of multiple processing units may be changed, or multiple processing units may be executed in parallel.

[0076] Furthermore, in the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may also be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory.

[0077] Furthermore, each component may be implemented by hardware. Each component may also be a circuit (or integrated circuit). These circuits may form a single circuit as a whole, or they may be separate circuits. Also, each of these circuits may be a general-purpose circuit or a dedicated circuit.

[0078] Furthermore, general or specific embodiments of the present invention may be implemented as a system, apparatus, method, integrated circuit, computer program, or recording medium such as a computer-readable CD-ROM. Alternatively, they may be implemented as any combination of a system, apparatus, method, integrated circuit, computer program, and recording medium.

[0079] For example, the present invention may be implemented as a disaster prevention system according to the above embodiment. Alternatively, the present invention may be implemented as a method executed by at least some of the processors of the evacuation guidance presentation system according to the above embodiment. The present invention may be implemented as a program (computer program product) for causing a computer to execute such a method, or as a computer-readable non-temporary recording medium on which such a program is recorded.

[0080] Furthermore, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art could conceive, or forms realized by arbitrarily combining the components and functions of each embodiment without departing from the spirit of the present invention. [Explanation of symbols]

[0081] 10. Evacuation Guidance Display System 11 Arithmetic section 12 Judgment section 13 Presentation part 21, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16 Sensor 22 Guidance UI 50 Disaster Prevention Systems

Claims

1. An evacuation guidance system that guides evacuations by displaying evacuation routes in the event of a fire in a facility, A calculation unit that calculates a spatial hazard value for each of the multiple unit spaces that virtually partition the facility, based on a function of the time it takes for smoke to reach the unit space from the point of origin of the fire, A determination unit determines the optimal evacuation route among multiple evacuation routes in the facility, which is the evacuation route that minimizes the sum of the spatial hazard values ​​of one or more unit spaces that pass through that evacuation route. The system includes a display unit that displays the evacuation route determined by the determination unit as the optimal evacuation route. Evacuation guidance display system.

2. The calculation unit acquires detection results from each of the multiple sensors provided in a unit space, and calculates the spatial risk value for each of the multiple unit spaces from the acquired detection results. The evacuation guidance display system according to claim 1.

3. The aforementioned sensor is a detector. The evacuation guidance display system according to claim 2.

4. The calculation unit calculates the amount of smoke emitted at the fire source using the following formula (1) V ｓ Based on the value and the time change of the acquired detection result, the spatial risk value for each of the multiple unit spaces is determined and calculated based on the determined smoke emission amount. [Math 1] The evacuation guidance display system according to claim 2 or 3.

5. The calculation unit calculates the time it takes for the smoke to arrive based on the path length and horizontal propagation speed of the smoke's path from the fire source to the unit space. The horizontal propagation velocity is proportional to the cube root of the amount of smoke emitted at the point where the fire originated. An evacuation guidance display system according to any one of claims 1 to 3.

6. Each of the aforementioned evacuation routes is a route leading to an emergency staircase or to the outdoors. An evacuation guidance display system according to any one of claims 1 to 3.

7. The display unit presents the optimal evacuation route using at least one of the following: sound, flashing lights, or digital signage. An evacuation guidance display system according to any one of claims 1 to 3.

8. The calculation unit reduces the horizontal propagation speed according to the branch paths present on the path from the fire source to the unit space. The evacuation guidance display system according to claim 5.

9. The calculation unit reduces the horizontal propagation speed according to the smoke exhaust mechanism present along the path from the fire source to the unit space. The evacuation guidance display system according to claim 5.

10. A computer-based method for presenting evacuation routes in the event of a fire in a facility, thereby guiding evacuations. In each of the multiple unit spaces that virtually partition the facility, the spatial hazard value of the unit space is calculated based on a function of the time it takes for smoke to reach the unit space from the point of origin of the fire. Among the multiple evacuation routes in the facility, the optimal evacuation route is determined to be the one in which the sum of the spatial hazard values ​​of one or more of the unit spaces traversed by that evacuation route is smallest. The evacuation route determined to be the optimal evacuation route is presented. Evacuation guidance presentation method.

11. To cause a computer to execute the evacuation guidance presentation method described in claim 10. program.

12. The system comprises an evacuation guidance display system according to claim 2 or 3, and the plurality of sensors provided in the facility. Disaster prevention system.

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