Disaster prevention system, detector, detector system, disaster prevention method, and program

Abstract

To provide a disaster prevention system capable of suppressing false alarms.SOLUTION: A disaster prevention system includes an acquisition unit 54 that acquires first notification information from a first fire alarm 20 installed at a construction site 90 and acquires second notification information from a second fire alarm 20 installed below the first fire alarm 20 at the construction site 90, and a determination unit 55 that determines whether or not a fire has occurred at the construction site 90 based on the first notification information and the second notification information.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a disaster prevention system, a detector, a detector system, a disaster prevention method, and a program. [Background technology]

[0002] Patent Document 1 discloses an acoustic device (home alarm) that can reduce evacuation time while preventing damage to the appearance of the building. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-175395 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, environmental changes at construction sites are more drastic than those inside completed buildings, and it is considered that fire alarms (detectors) installed at construction sites are more likely to erroneously determine that a fire has occurred than detectors installed inside completed buildings. In other words, the challenge at construction sites is to suppress false alarms from detectors installed at construction sites.

[0005] The present invention provides a disaster prevention system and the like that can reduce false alarms. [Means for solving the problem]

[0006] A disaster prevention system according to one embodiment of the present invention includes an acquisition unit that acquires first detection information from a first detector installed at a construction site and acquires second detection information from a second detector installed below the first detector at the construction site, and a determination unit that determines whether a fire has occurred at the construction site based on the first detection information and the second detection information.

[0007] A detector according to one embodiment of the present invention is a detector installed at a construction site, and includes an acquisition unit that acquires first detection information of other detectors installed at the construction site from the other detectors, and a determination unit that determines whether a fire has occurred at the construction site based on the acquired first detection information and second detection information of the detector.

[0008] A detector system according to one aspect of the present invention includes the detector and the other detector.

[0009] A disaster prevention method according to one embodiment of the present invention is a disaster prevention method executed by a computer, and includes an acquisition step of acquiring first detection information from a first detector installed at a construction site and acquiring second detection information from a second detector installed below the first detector at the construction site, and a determination step of determining whether a fire has occurred at the construction site based on the first detection information and the second detection information.

[0010] A program according to one aspect of the present invention is a program for causing a computer to execute the disaster prevention method. Effect of the Invention

[0011] According to the present invention, a disaster prevention system or the like capable of suppressing false alarms is realized. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a block diagram showing a functional configuration of a construction work support system according to the first embodiment. [Diagram 2] FIG. 2 is a diagram showing an example of a stand on which a fire alarm is mounted. [Diagram 3] FIG. 3 is a diagram showing an example of a stand to which a fire alarm and a repeater are attached. [Figure 4] FIG. 4 is a cross-sectional view showing a first example of a method for mounting the fire alarm on the first mounting plate. [Diagram 5]FIG. 5 is a cross-sectional view showing a second example of a method for mounting a fire alarm on a first mounting plate. [Figure 6] FIG. 6 is a sequence diagram of a first example of a notification operation of the construction work support system according to the first embodiment in response to an occurrence of a fire. [Figure 7] FIG. 7 is a diagram showing an example of a notification screen for notifying that a fire has occurred. [Figure 8] FIG. 8 is a sequence diagram of a second example of the operation of notifying the occurrence of a fire in the construction work support system according to the first embodiment. [Figure 9] FIG. 9 is a sequence diagram of a first example of a notification operation of information related to maintenance in the construction work support system according to the first embodiment. [Figure 10] FIG. 10 is a diagram showing an example of a notification screen indicating the time for maintenance. [Figure 11] FIG. 11 is a sequence diagram of a second example of a notification operation of information related to maintenance in the construction work support system according to the first embodiment. [Figure 12] FIG. 12 is a sequence diagram of a first modification of the operation of notifying the occurrence of a fire in the construction work support system according to the first embodiment. [Figure 13] FIG. 13 is a diagram showing a construction site that is a target of Modification 2 of the fire occurrence notification operation of the construction work support system according to the first embodiment. [Figure 14] FIG. 14 is a flowchart of a determination operation in Modification 2 of the notifying operation of the occurrence of a fire in the construction work support system according to the first embodiment. [Figure 15] FIG. 15 is a block diagram showing a functional configuration of a construction work support system according to a modified example of the first embodiment. As shown in FIG. [Figure 16] FIG. 16 is a block diagram showing a functional configuration of the construction work support system according to the second embodiment. As shown in FIG. [Figure 17] FIG. 17 is a sequence diagram of example 1 of a notification operation of the construction work support system according to the second embodiment in the event of a fire. [Figure 18]FIG. 18 is a sequence diagram of a second example of a notification operation of the construction work support system according to the second embodiment in response to an occurrence of a fire. [Figure 19] FIG. 19 is a sequence diagram of example 1 of a notification operation of information related to maintenance in the construction work support system according to the second embodiment. [Figure 20] FIG. 20 is a sequence diagram of a second example of a notification operation of information related to maintenance in the construction work support system according to the second embodiment. [Figure 21] FIG. 21 is a block diagram showing a functional configuration of a construction work support system according to a modified example of the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the embodiments will be described in detail with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component arrangement and connection forms, steps, and order of steps 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, components that are not described in the independent claims will be described as optional components.

[0014] In addition, each drawing is a schematic diagram and is not necessarily a precise illustration. In each drawing, the same reference numerals are used for substantially the same configurations, and duplicated explanations may be omitted or simplified.

[0015] (Embodiment 1) [composition] The following describes the configuration of the construction work support system according to embodiment 1. Fig. 1 is a block diagram showing the functional configuration of the construction work support system according to embodiment 1.

[0016] The construction work support system 10 shown in Fig. 1 is a disaster prevention system that can notify that a fire has occurred at a construction site 90. The construction work support system 10 can also notify regarding maintenance of equipment installed at the construction site 90. The construction site 90 is a location where a building is in the process of being constructed, and in the following description, the construction site 90 is described as being the interior of a building in the process of being constructed. The building here is, for example, an apartment building, a factory, a research facility, a medical facility, or an accommodation facility, but is not limited to this.

[0017] The construction work support system 10 comprises a plurality of fire alarms 20, a repeater 30, a base station 40, a server device 50, a sensor device 60, and an information terminal 70. It is sufficient that the construction work support system 10 comprises at least one fire alarm 20. The construction work support system 10 comprises one repeater 30 for the plurality of fire alarms 20, but the construction work support system 10 may comprise a plurality of repeaters 30 for the plurality of fire alarms 20, for example, a plurality of repeaters 30 in one-to-one correspondence with the plurality of fire alarms 20.

[0018] The fire alarm 20 is temporarily installed at the construction site 90 (specifically, a building under construction, etc.) to detect the occurrence of a fire at the construction site 90 at least until the building is completed. The fire alarm 20 is an example of a detector, and a plurality of fire alarms 20 is an example of a detector system. The fire alarm 20 includes a smoke sensor 21, a communication unit 23, a control unit 24, a memory unit 25, an alarm unit 26, and a main body unit 27.

[0019] The smoke sensor 21 is a sensor for detecting the occurrence of a fire at the construction site 90. The smoke sensor 21 includes a light-emitting element such as a light-emitting diode, and a light-receiving element such as a photodiode. In the smoke sensor 21, the light emitted by the light-emitting element is scattered by smoke particles and enters the light-receiving element, and the smoke sensor 21 can detect the occurrence of smoke based on the amount of light entering the light-receiving element.

[0020] The fire alarm 20 may include a heat sensor (temperature sensor) instead of the smoke sensor 21 or in addition to the smoke sensor 21. The heat sensor is another example of a sensor for detecting the occurrence of a fire.

[0021] The communication unit 23 is a communication circuit for the fire alarm device 20 to communicate with the server device 50 via the repeater 30 and the base station 40, and is also a communication circuit for the fire alarm device 20 to communicate with the sensor device 60 and other fire alarm devices 20. The communication unit 23 is, for example, a wireless communication circuit that performs wireless communication with the repeater 30. There are no particular limitations on the communication standard of the communication performed by the communication unit 23.

[0022] In addition, in cases where the communication standard for the fire alarm 20 to communicate with the repeater 30 is different from the communication standard for the fire alarm 20 to communicate with the sensor device 60 and other fire alarms 20, the communication unit 23 may include two types of communication circuits: a first communication circuit for the fire alarm 20 to communicate with the repeater 30, and a second communication circuit for the fire alarm 20 to communicate with the sensor device 60 and other fire alarms 20.

[0023] When the smoke sensor 21 detects the occurrence of a fire, the control unit 24 activates the alarm unit 26 to notify a person located at the construction site 90. When the smoke sensor 21 detects the occurrence of a fire, the control unit 24 notifies the user of the information terminal 70 of the occurrence of a fire by transmitting notification information to the server device 50 using the communication unit 23. The control unit 24 is realized, for example, by a microcomputer, but may also be realized by a processor. The control unit 24 includes an acquisition unit 24a and a determination unit 24b as functional components. The functions of the acquisition unit 24a and the determination unit 24b are realized, for example, by the microcomputer or processor constituting the control unit 24 executing a computer program stored in the storage unit 25.

[0024] The storage unit 25 is a storage device that stores computer programs and the like executed by the control unit 24. The storage unit 25 is realized by, for example, a semiconductor memory.

[0025] When the control unit 24 (determination unit 24b) determines that a fire has occurred, the notification unit 26 issues a notification to people located at the construction site 90. The notification unit 26 is realized by, for example, at least one of a speaker and a light-emitting element, and issues a notification by at least one of sound and light.

[0026] The main body 27 is a housing that houses the smoke sensor 21, the communication unit 23, the control unit 24, the storage unit 25, and the notification unit 26. The main body 27 is formed of, for example, a resin material.

[0027] The repeater 30 is a gateway device that enables the fire alarm device 20 to communicate with the base station 40. In other words, the repeater 30 is a device that enables the fire alarm device 20 to communicate with the server device 50 through a mobile communication network. The repeater 30 is temporarily installed, for example, at a construction site 90. The base station 40 is a base station of the mobile communication network, and is located, for example, outside the construction site 90.

[0028] The server device 50 notifies the information terminal 70 of the occurrence of a fire based on the notification information received from the fire alarm 20. The server device 50 also provides notifications regarding equipment maintenance based on the sensing results of the environmental sensor 61 provided in the sensor device 60. The server device 50 includes a communication unit 51, an information processing unit 52, and a storage unit 53.

[0029] The communication unit 51 is a communication circuit for the server device 50 to communicate with the fire alarm 20 and the information terminal 70. The communication unit 51 is, for example, a wired communication circuit for performing wired communication, but may also be a wireless communication circuit for performing wireless communication. The communication standard of the communication performed by the communication unit 51 is not particularly limited.

[0030] The information processing unit 52 performs information processing for notifying the occurrence of a fire and notifying about equipment maintenance. The information processing unit 52 is realized, for example, by a microcomputer, but may be realized by a processor. The information processing unit 52 includes an acquisition unit 54 and a determination unit 55 as functional components. The functions of the acquisition unit 54 and the determination unit 55 are realized, for example, by the microcomputer or processor constituting the information processing unit 52 executing a computer program stored in the storage unit 53.

[0031] The storage unit 53 is a storage device that stores computer programs and the like executed by the information processing unit 52. The storage unit 53 is realized by, for example, a semiconductor memory.

[0032] The sensor device 60 is temporarily installed at the construction site 90 in order to sense the environment at the construction site 90 at least until the building is completed. The sensor device 60 is a device separate from the fire alarm 20. The sensor device 60 includes an environmental sensor 61. The sensor device 60 is capable of communicating with the fire alarm 20. The sensor device 60 may also be capable of communicating with the server device 50 via the repeater 30.

[0033] The environmental sensor 61 senses the environment at the construction site 90. Specifically, the environmental sensor 61 is a temperature sensor, a humidity sensor, a dust sensor (in other words, a particulate matter concentration sensor), an image sensor (in other words, a camera), a gas sensor, or the like. That is, the environmental sensor 61 senses the temperature, humidity, amount of dust generated (generation level), images, or the concentration of a predetermined gas at the construction site 90. The predetermined gas is carbon dioxide, carbon monoxide, or the like.

[0034] The sensor device 60 may be a fire alarm of the same type or a different type than the fire alarm 20. For example, if the fire alarm 20 is a smoke type, the sensor device 60 may be a heat type fire alarm.

[0035] The information terminal 70 is a portable information terminal such as a personal computer, a tablet terminal, or a smartphone. The information terminal 70 is used by a user to receive notifications of a fire occurring at the construction site 90 and notifications regarding maintenance. The user of the information terminal 70 may be a worker working at the construction site 90, or a manager managing the workers. In FIG. 1, the information terminal 70 is located outside the construction site 90, but when the user of the information terminal 70 is a worker, the information terminal 70 is located at the construction site 90.

[0036] The information terminal 70 includes a display unit 71 that displays an image (notification screen). The display unit 71 is realized by a display panel such as a liquid crystal panel or an organic EL panel.

[0037] [Fire alarm installation status] The fire alarm 20 is usually installed in the ceiling of the space within a building, but since there are periods during which the ceiling is not formed at the construction site 90, there is room for consideration as to how to install the fire alarm 20 at the construction site 90.

[0038] Furthermore, at the construction site 90, locations where fires are likely to occur, such as storage locations for flammable materials and hot work sites, change as the construction of the building progresses. Therefore, it is desirable to install the fire alarm 20 so that its installation location can be changed flexibly.

[0039] In the construction work support system 10, for example, the fire alarm 20 is attached to a stand, which is a portable piece of equipment, and the stand with the fire alarm 20 attached is installed at the construction site 90. Fig. 2 is a diagram showing an example of a stand with the fire alarm 20 attached.

[0040] The stand 80 is, in other words, a mounting base, and is made of, for example, a metal material, but may be made partially or entirely of a resin material. Also, the stand 80 may be made partially of wood.

[0041] As shown in FIG. 2, the stand 80 is shaped like a music stand and has a pole 81, a first mounting plate 82 fixed to the upper part of the pole 81, and a second mounting plate 83 fixed to the lower part of the pole 81.

[0042] The fire alarm 20 is attached to the underside of the first mounting plate 82. Furthermore, the sensor device 60 is attached to the underside of the second mounting plate 83. A repeater 30 may also be attached to the stand 80. FIG. 3 is a diagram showing an example of a stand 80 to which the fire alarm 20 and the repeater 30 are attached. In the example of FIG. 3, the repeater 30 is attached to the first mounting plate 82, but it may also be attached to the second mounting plate 83.

[0043] Since the fire alarm 20 is usually installed on the ceiling of an indoor space, it is preferable that the height of the first mounting plate 82 of the stand 80 (i.e., the height of the fire alarm 20) is located near the height of the ceiling of the building under construction at the construction site 90. In order to adjust the height of the first mounting plate 82, the first mounting plate 82 may be provided with a mechanism that can change the fixed position relative to the pole 81, and the pole 81 may be provided with an extendable mechanism.

[0044] 2, the fire alarm 20 and the sensor device 60 are attached to one stand 80, but the fire alarm 20 and the sensor device 60 may be attached to different stands 80. In this case, the stand 80 needs to have at least one mounting plate, and is not required to have two mounting plates.

[0045] There are two possible specific methods for mounting (fixing) the fire alarm 20 to the first mounting plate 82, as shown in Figures 4 and 5. Figures 4 and 5 are cross-sectional views showing one example of a method for mounting the fire alarm 20 to the first mounting plate 82.

[0046] In the fire alarm 20, the base portion 28 is usually attached to the ceiling first, and the main body portion 27 is connected to the base portion 28 by, for example, screwing the main body portion 27 into the base portion 28. Therefore, in the example of Fig. 4, the base portion 28 is attached to the first mounting plate 82 with a screw, and the main body portion 27 is connected to the base portion 28. In this case, the mounting portion 29 for mounting the fire alarm 20 to the stand 80 is provided on the base portion 28. Specifically, the mounting portion 29 is an attachment structure including at least one of a screw, a screw insertion hole, and a catch for the screw head.

[0047] 5, the main body 27 is attached directly to the first attachment plate 82. In this case, the attachment portion 29 for attaching the fire alarm 20 to the stand 80 is provided on the main body 27.

[0048] As described above, the fire alarm 20 includes the mounting portion 29 for mounting the fire alarm 20 to the stand 80. The installation location of the fire alarm 20 mounted on the stand 80 can be easily changed by changing the installation position of the stand 80. In other words, the fire alarm 20 is useful as a fire alarm whose installation location can be easily changed.

[0049] In addition, the fire alarm 20 has the advantage that it is not attached to the building itself under construction and therefore does not interfere with construction work. If the fire alarm 20 is installed at a height equivalent to the ceiling of a completed building using the stand 80, the fire alarm 20 can perform the same as if it were installed on the ceiling. In this specification, a detector unit including the fire alarm 20 and the stand 80 is also referred to as a portable detector system.

[0050] [Example 1 of fire notification behavior] Next, a description will be given of a fire outbreak notification operation of the construction work support system 10. Fig. 6 is a sequence diagram of an example 1 of a fire outbreak notification operation of the construction work support system 10.

[0051] When the acquisition unit 24a of the fire alarm 20 determines that the smoke level (amount of smoke) sensed by the smoke sensor 21 is above a threshold value (S11), it communicates with the sensor device 60 using the communication unit 23 to receive environmental information indicating the environment sensed by the environmental sensor 61 (S12) and acquires the received environmental information (S13).

[0052] The determination unit 24b determines whether the environment indicated by the environmental information satisfies a predetermined requirement (S14). For example, when the environmental sensor 61 is an image sensor (camera), the acquisition unit 24a acquires image information as the environmental information, and the determination unit 24b performs a predetermined information processing on the image information to determine whether a flame is reflected in the image. For example, the determination unit 24b can determine whether a flame is reflected in the image by inputting the image information into a machine learning model. In this case, the predetermined requirement is that a flame is reflected in the image. The determination unit 24b may extract an area of ​​the image that is likely to be a candidate for smoke as a candidate area, and determine whether smoke is reflected in the image by extracting various feature amounts related to brightness, color, shape, movement, etc. from the candidate area. In this case, the predetermined requirement is that smoke is reflected in the image.

[0053] Also, when the environment sensor 61 is a dust sensor, the acquisition unit 24a acquires dust level information (information indicating the amount of dust) as the environment information, and the determination unit 24b determines whether the dust level is equal to or lower than a threshold value. The threshold value here means a threshold value set in advance for the dust level. In this case, the above-mentioned predetermined requirement is that the dust level is equal to or lower than a threshold value.

[0054] Also, when the environment sensor 61 is a temperature sensor, the acquisition unit 24a acquires temperature information as the environment information, and the determination unit 24b determines whether the temperature is equal to or higher than a threshold value. The threshold value here means a threshold value set in advance for the temperature. In this case, the above-mentioned predetermined requirement is that the temperature is equal to or higher than a threshold value.

[0055] Also, when the environmental sensor 61 is a gas sensor, the acquisition unit 24a acquires gas concentration information as environmental information, and the determination unit 24b determines whether the gas concentration is equal to or greater than a threshold. The gas concentration is, for example, the concentration of carbon dioxide or carbon monoxide. The threshold here means a threshold value that is set in advance for the gas concentration. In this case, the above-mentioned predetermined requirement is that the gas concentration is equal to or greater than a threshold.

[0056] If it is determined in step S14 that the predetermined requirements regarding the environmental information are not met, the processes in steps S15 and after are not performed. In other words, even if the smoke level is equal to or higher than the threshold, if the predetermined requirements regarding the environmental information are not met, it is determined that no fire has occurred.

[0057] On the other hand, when it is determined in step S14 that the predetermined requirements are satisfied, the determination unit 24b activates the notification unit 26 to notify the workers at the construction site 90 of the occurrence of a fire (S15). The workers are notified by at least one of sound and light.

[0058] In addition, determination unit 24b uses communication unit 23 to transmit the notification information to server device 50 (S16). Although not shown in detail in FIG. 6, the notification information is transmitted to server device 50 via relay 30 and base station 40.

[0059] The communication unit 51 of the server device 50 receives the notification information. The information processing unit 52 transmits the received notification information to the information terminal 70 that has been registered in advance, using the communication unit 51 (S17).

[0060] The information terminal 70 receives the notification information, and displays a notification screen for notifying that a fire has broken out at the construction site 90 on the display unit 71 provided in the information terminal 70 based on the received notification information (S18). Fig. 7 is a diagram showing an example of the notification screen. In addition to displaying the notification screen, the information terminal 70 may output a notification sound for notifying that a fire has broken out at the construction site 90 from a speaker (not shown) provided in the information terminal 70.

[0061] The storage unit 53 of the server device 50 stores information associating the identification information of the fire alarm 20 with information relating to the installation location of the fire alarm 20. If the information relating to the installation location includes the name of a building under construction at the construction site 90, the name of the building in which the fire occurred can be displayed on the notification screen as shown in Fig. 7. Although not shown, if the information relating to the installation location includes information regarding the floor on which the fire alarm 20 is installed and the area (district) to which the construction site 90 belongs, the floor on which the fire occurred and the area in which the fire occurred can be displayed on the notification screen.

[0062] Furthermore, if the information regarding the installation location includes information indicating the coordinates (e.g., latitude and longitude) of the construction site 90, it is possible to display a map on the notification screen and then indicate the location of the fire on the map. In this case, for example, at least one of the server device 50 and the information terminal 70 communicates with a server device (not shown) that manages map information, thereby acquiring map information for displaying the map on the notification screen.

[0063] In this way, in the construction work support system 10, the fire alarm 20 determines whether or not a fire has occurred based on the detection result of the smoke sensor 21 and the environmental information acquired from the sensor device 60. As a result, the construction work support system 10 can reduce the occurrence of false alarms compared to a system that determines whether or not a fire has occurred based only on the detection result of the smoke sensor 21.

[0064] [Example 2 of fire notification behavior] In example 1 of the operation of notifying the occurrence of a fire, the determination as to whether or not a fire has occurred is made by the fire alarm 20, but this determination may also be made by the server device 50. Hereinafter, an explanation will be given of example 2 of such an operation of notifying the occurrence of a fire in the construction work support system 10. Fig. 8 is a sequence diagram of example 2 of the operation of notifying the occurrence of a fire in the construction work support system 10.

[0065] The control unit 24 of the fire alarm 20 uses the communication unit 23 to transmit smoke level information indicating the smoke level (amount of smoke) sensed by the smoke sensor 21 to the server device 50 (S21). In addition, the sensor device 60 transmits environmental information indicating the environment sensed by the environmental sensor 61 to the server device 50 (S22). Although not shown in detail in FIG. 8, the smoke level information and environmental information are transmitted to the server device 50 via the repeater 30 and the base station 40.

[0066] The communication unit 51 of the server device 50 receives the smoke level information and the environmental information, and the acquisition unit 54 acquires the smoke level information and the environmental information received by the communication unit 51 (S23).

[0067] The determination unit 55 determines whether the smoke level indicated by the smoke level information is equal to or higher than a threshold value and whether the environment indicated by the environmental information satisfies a predetermined requirement (S24). The predetermined requirement is the same as that in the example 1 of the notification operation of the occurrence of a fire.

[0068] The determination of whether the smoke level is equal to or above the threshold may be performed by the control unit 24 of the fire alarm 20. In this case, in step S21, notification information indicating that the smoke level is equal to or above the threshold is transmitted, and in step S24, the determination of whether the smoke level is equal to or above the threshold is omitted.

[0069] If it is determined in step S24 that the smoke level indicated by the smoke level information is below the threshold, and if it is determined in step S24 that the environment indicated by the environmental information does not satisfy the predetermined requirement, the processes in and after step S25 are not performed. On the other hand, if it is determined in step S25 that the predetermined requirement is satisfied, the determination unit 55 uses the communication unit 51 to transmit an alarm command to the fire alarm 20 (S25).

[0070] The communication unit 23 of the fire alarm 20 receives the notification command. The control unit 24 activates the notification unit 26 to notify the workers at the construction site 90 of the occurrence of a fire (S26). The workers are notified by at least one of sound and light.

[0071] Furthermore, the determination unit 55 uses the communication unit 51 to transmit the received notification information to the information terminal 70 that has been registered in advance (S27).

[0072] The information terminal 70 receives the notification information, and based on the received notification information, displays a notification screen (such as FIG. 7) for notifying that a fire has broken out at the construction site 90 on the display unit 71 provided in the information terminal 70 (S28). In addition to displaying the notification screen, the information terminal 70 may output a notification sound from a speaker (not shown) provided in the information terminal 70 for notifying that a fire has broken out at the construction site 90.

[0073] In this way, in the construction work support system 10, the server device 50 determines whether or not a fire has occurred based on the smoke level information acquired from the fire alarm 20 and the environmental information acquired from the sensor device 60. As a result, the construction work support system 10 can reduce the occurrence of false alarms compared to a system that determines whether or not a fire has occurred based only on the detection result of the smoke sensor 21.

[0074] [Example 1 of notification for maintenance information] Next, the operation of notifying information related to maintenance of the construction work support system 10 will be described. Fig. 9 is a sequence diagram of an example 1 of the operation of notifying information related to maintenance of the construction work support system 10. Specifically, the information related to maintenance is information indicating the replacement time of equipment or consumables (such as batteries) attached to the equipment, or information indicating the time to perform maintenance work or inspection work on the equipment. The equipment here is, for example, a fire alarm 20, but may also be an environmental sensor 61 (various sensors exemplified as the environmental sensor 61) or other equipment installed at the construction site 90. In the following, the environmental sensor 61 will be described as a dust sensor.

[0075] The acquisition unit 24a of the fire alarm 20 communicates with the sensor device 60 using the communication unit 23 to receive dust level information indicating the dust level sensed by the environmental sensor 61 (S31) and acquires the received dust level information (S32).

[0076] The determination unit 24b determines whether the dust level indicated by the acquired dust level information is equal to or higher than a threshold (S33), and accumulates the time during which it is determined that the dust level is equal to or higher than the threshold, and stores the accumulated time in the storage unit 25 (S34). The processes of steps S31 to S34 are periodically repeated.

[0077] Thereafter, when determining that the accumulated time has reached a predetermined value (S35), determining unit 24b transmits information related to maintenance to server device 50 using communication unit 23 (S36). Although not shown in detail in FIG. 9, the information related to maintenance is transmitted to server device 50 via repeater 30 and base station 40. The predetermined value is determined in advance based on the type of device and the contents of maintenance, and is stored in storage unit 53.

[0078] The communication unit 51 of the server device 50 receives the information regarding the maintenance. The information processing unit 52 uses the communication unit 51 to transmit the received information regarding the maintenance to the information terminal 70 that has been registered in advance (S37).

[0079] The information terminal 70 receives the information regarding the maintenance, and displays a notification screen indicating the time for maintenance on the display unit 71 provided in the information terminal 70 based on the received information regarding the maintenance (S38). Fig. 10 is a diagram showing an example of the notification screen indicating the time for maintenance.

[0080] In the example of Fig. 10, the notification screen displays the future maintenance date, but if it is determined that immediate maintenance is required (if the maintenance date has passed), a message such as "Maintenance is required now" is displayed. Also, when a notification is issued regarding the replacement date for a device or device consumables, a message such as "Device replacement is required in one month" is displayed on the notification screen.

[0081] The notification screen may display detailed information about the device that requires maintenance, including at least one of the device name and information about the location where the device is installed.

[0082] For example, if the memory unit 53 of the server device 50 stores information that associates the identification information of the fire alarm 20 with detailed information of the equipment for which the need for maintenance is managed by the fire alarm 20, detailed information of the equipment requiring maintenance can be displayed on the notification screen.

[0083] Furthermore, when the need for maintenance of multiple devices is managed by the fire alarm 20, the multiple devices may be displayed in a list on the notification screen. In this case, the order of the list display may be rearranged according to the type of device. Furthermore, when the predetermined value for the above-mentioned accumulated time differs for each device, the time when maintenance is required differs for each device. In such a case, the order of the list display may be rearranged according to the time when maintenance is required.

[0084] Furthermore, if the information on the installation location includes information indicating the coordinates (e.g., latitude and longitude) of the installation location of the device, a map can be displayed on the notification screen and the location of the device requiring maintenance can be indicated on the map. In this case, for example, at least one of the server device 50 and the information terminal 70 communicates with a server device (not shown) that manages map information to obtain map information for displaying the map on the notification screen.

[0085] Thus, in the construction work support system 10, the fire alarm 20 determines whether or not maintenance is necessary based on the dust level information acquired from the sensor device 60. This allows the construction work support system 10 to provide the user of the information terminal 70 with information regarding the maintenance of the equipment installed at the construction site 90 based on the dust level information.

[0086] In addition to the dust level information, the environmental information used to transmit the information regarding maintenance may also include temperature information. For example, devices are prone to deterioration in high or low temperature environments, leading to an increased failure rate. Therefore, instead of the dust level information, the determination unit 24b may accumulate the time during which the temperature satisfies a predetermined requirement, and transmit the information regarding maintenance to the server device 50 using the communication unit 23 when the accumulated time reaches a predetermined value.

[0087] [Example 2 of notification for maintenance information] In example 1 of the operation of notifying information regarding maintenance, the determination as to whether or not maintenance is necessary is made by the fire alarm 20, but this determination may be made by the server device 50. Hereinafter, an example 2 of such an operation of notifying information regarding maintenance of the construction work support system 10 will be described. Fig. 11 is a sequence diagram of example 2 of the operation of notifying information regarding maintenance of the construction work support system 10. In the following, the environmental sensor 61 will be described as being a dust sensor.

[0088] The sensor device 60 transmits dust level information indicating the dust level sensed by the environmental sensor 61 to the server device 50 (S41). Although not shown in detail in FIG. 11, the dust level information is transmitted to the server device 50 via the repeater 30 and the base station 40.

[0089] The communication unit 51 of the server device 50 receives the dust level information, and the acquisition unit 54 acquires the received dust level information (S42).

[0090] The determination unit 55 determines whether the dust level indicated by the acquired dust level information is equal to or higher than a threshold (S43), and accumulates the time during which it is determined that the dust level is equal to or higher than the threshold, and stores the accumulated time in the storage unit 25 (S44). The processes of steps S41 to S44 are periodically repeated.

[0091] Thereafter, when the determining unit 55 determines that the accumulated time has reached a predetermined value (S45), it uses the communication unit 51 to transmit information related to the maintenance to the information terminal 70 that has been registered in advance (S46).

[0092] The information terminal 70 receives the information regarding maintenance, and displays a notification screen (FIG. 10, etc.) indicating the time for maintenance on the display unit 71 provided in the information terminal 70 based on the received information regarding maintenance (S47).

[0093] Thus, in the construction work support system 10, the server device 50 determines whether or not maintenance is necessary based on the dust level information acquired from the sensor device 60. This allows the construction work support system 10 to provide the user of the information terminal 70 with information regarding the maintenance of the equipment installed at the construction site 90 based on the dust level information.

[0094] In addition to dust level information, temperature information can also be used as environmental information for outputting information related to maintenance. For example, devices are prone to deterioration in high or low temperature environments, leading to an increased failure rate. Therefore, instead of dust level information, the determination unit 55 may accumulate the time during which the temperature satisfies a predetermined requirement, and when the accumulated time reaches a predetermined value, the determination unit 55 may transmit information related to maintenance to the information terminal 70 using the communication unit 51.

[0095] [Modification 1 of the fire notification behavior] In examples 1 and 2 of the operation of notifying the occurrence of a fire, another fire alarm 20 may be used instead of the sensor device 60. That is, in examples 1 and 2 of the operation of notifying the occurrence of a fire, the already mentioned fire alarm 20 may be regarded as the first fire alarm 20, the sensor device 60 may be read as the second fire alarm 20 which is the other fire alarm 20, and the environmental sensor 61 may be read as a sensor for detecting a fire provided in the second fire alarm 20.

[0096] In this case, the first fire alarm 20 and the second fire alarm 20 are equipped with, for example, a smoke sensor 21, but the first fire alarm 20 and the second fire alarm 20 may be equipped with different sensors. For example, one of the first fire alarm 20 and the second fire alarm 20 may be equipped with the smoke sensor 21 to detect smoke, and the other of the first fire alarm 20 and the second fire alarm 20 may be equipped with a gas sensor to detect a predetermined gas. Each of the first fire alarm 20 and the second fire alarm 20 may be equipped with at least one of the smoke sensor 21, a heat sensor, and a gas sensor as a sensor for detecting a fire.

[0097] When two fire alarms 20 are used in Examples 1 and 2 of the fire occurrence notification operation, another fire alarm 20 is attached to the second mounting plate 83 of the stand 80 in place of the sensor device 60. In this case, the two fire alarms 20 attached to the stand 80 are installed at different positions in the up-down direction (vertical direction).

[0098] Furthermore, when another fire alarm 20 is used instead of the sensor device 60, the example 2 of the fire notification operation may be modified as follows. Fig. 12 is a sequence diagram of the modified example 1 of the fire notification operation. In the following explanation of Fig. 12, the two fire alarms 20 are distinguished into a first fire alarm 20 and a second fire alarm 20, and the second fire alarm 20 is assumed to be installed below the first fire alarm 20.

[0099] When the judgment unit 24b of the first fire alarm 20 determines that the smoke level (amount of smoke) sensed by the smoke sensor 21 equipped in the first fire alarm 20 is above a threshold value (S51), it uses the communication unit 23 to transmit first notification information to the server device 50 (S52).

[0100] Similarly, when the judgment unit 24b of the second fire alarm 20 determines that the smoke level (amount of smoke) sensed by the smoke sensor 21 equipped in the second fire alarm 20 is above a threshold value (S51), it transmits second notification information to the server device 50 using the communication unit 23 (S52).

[0101] The communication unit 51 of the server device 50 receives the first notification information and the second notification information, and the acquisition unit 54 acquires the first notification information and the second notification information received by the communication unit 51 (S53).

[0102] The determination unit 55 determines whether or not the second notification information has been acquired within a predetermined period of time since the first notification information was acquired (S54).

[0103] In cases where it is determined in step S54 that the second notification information has been acquired after a predetermined period of time has elapsed since the first notification information was acquired, the processes in and after step S55 are not performed. On the other hand, in cases where it is determined in step S54 that the second notification information has been acquired within a predetermined period of time since the first notification information was acquired, the determination unit 55 uses the communication unit 51 to transmit an alarm command to each of the first fire alarm 20 and the second fire alarm 20 (S55).

[0104] The communication units 23 of the first and second fire alarm devices 20 receive the notification command. The control units 24 of the first and second fire alarm devices 20 activate the notification units 26 to notify the workers at the construction site 90 of the occurrence of a fire (S56). The workers are notified by at least one of sound and light.

[0105] Furthermore, the determination unit 55 uses the communication unit 51 to transmit the notification information to the information terminal 70 that has been registered in advance (S57).

[0106] The information terminal 70 receives the notification information, and based on the received notification information, displays a notification screen (such as FIG. 7) for notifying that a fire has broken out at the construction site 90 on the display unit 71 provided in the information terminal 70 (S58). In addition to displaying the notification screen, the information terminal 70 may output a notification sound from a speaker (not shown) provided in the information terminal 70 for notifying that a fire has broken out at the construction site 90.

[0107] Thus, in the construction work support system 10, the server device 50 acquires the first notification information from the first fire alarm 20 installed at the construction site 90, acquires the second notification information from the second fire alarm 20 installed below the first fire alarm 20 at the construction site 90, and determines whether or not a fire has occurred at the construction site 90 based on the first notification information and the second notification information. More specifically, when only one of the first notification information and the second notification information is acquired within a predetermined period, the server device 50 determines that a fire has not occurred at the construction site 90, and when both the first notification information and the second notification information are acquired within a predetermined period, the server device 50 determines that a fire has occurred at the construction site 90.

[0108] As a result, the construction work support system 10 can reduce the occurrence of false alarms compared to a system that determines whether or not a fire has occurred based on the detection result of only one fire alarm 20.

[0109] In the present modified example 1, the first fire alarm 20 and the second fire alarm 20 are provided with the smoke sensor 21 to detect smoke, but the first fire alarm 20 and the second fire alarm 20 may be provided with different sensors. For example, one of the first fire alarm 20 and the second fire alarm 20 may be provided with the smoke sensor 21 to detect smoke, and the other of the first fire alarm 20 and the second fire alarm 20 may be provided with a gas sensor to detect a predetermined gas. Each of the first fire alarm 20 and the second fire alarm 20 may be provided with at least one of the smoke sensor 21, a heat sensor, and a gas sensor as a sensor for detecting fire.

[0110] In addition, when one of the first fire alarm 20 and the second fire alarm 20 detects smoke and the other of the first fire alarm 20 and the second fire alarm 20 detects a specified gas, a configuration in which the first fire alarm 20 located above detects smoke and the second fire alarm 20 located below detects the specified gas is more preferable.

[0111] [Fire notification behavior variation 2] Incidentally, when the fire alarm 20 is equipped with the smoke sensor 21, one cause of false alarms is that the fire alarm 20 interprets the generation of dust at the construction site 90 as the generation of smoke. Therefore, if it is possible to know the locations where work will be performed at the construction site 90 on a given day, the server device 50 can know in advance that dust will be generated at the locations where work will be performed, causing a false alarm.

[0112] Therefore, hereinafter, an example will be described in which the server device 50 detects a fire by using two fire alarms 20 each equipped with a smoke sensor 21 in combination based on location information relating to the location where work is performed at the construction site. Fig. 13 is a diagram showing a construction site 90 that is a target of the modified example 2 of the notification operation of the occurrence of a fire. Fig. 14 is a flowchart of the determination operation in the modified example 2 of the notification operation of the occurrence of a fire.

[0113] As shown in FIG. 13, in the following description of FIG. 14, the first fire alarm 20 is located in a first area 91 near the ceiling (or the location where the ceiling is planned to be formed) of a construction site 90, and the second fire alarm 20 is located in a second area 92 near the floor (or the location where the floor is planned to be formed) of the construction site 90.

[0114] 14, the acquisition unit 54 of the server device 50 acquires location information (S61). For example, the acquisition unit 54 communicates with another server device that manages a work schedule at the construction site 90 using the communication unit 51, thereby acquiring work schedule information as location information from the other server device. In a case where a worker inputs the work location of the day into an information terminal installed at the construction site 90, the acquisition unit 54 may acquire location information indicating the work location input into the information terminal by communicating with the information terminal using the communication unit 51.

[0115] The determination unit 55 determines the work location based on the acquired location information (S62). If the location information indicates that work will be performed in a first area 91 near the ceiling of the construction site 90, it is estimated that the first fire alarm 20 installed in the first area 91 is likely to cause false alarms due to dust generated by the work.

[0116] Therefore, when the determination unit 55 determines that work is being performed in the first area 91 of the construction site 90 based on the acquired location information (first area in S62), even if first notification information is acquired from the first fire alarm 20, it treats this as invalid notification information (S63) and determines that no fire has occurred at the construction site 90. On the other hand, when the determination unit 55 determines that work is being performed in the first area 91, if second notification information is acquired from the second fire alarm 20, it treats it as valid notification information and determines that a fire has occurred at the construction site 90.

[0117] In addition, if the location information indicates that work is being carried out in a second area 92 closer to the floor of the construction site 90, it is estimated that the second fire alarm 20 installed in the second area 92 is prone to false alarms due to dust generated by the work.

[0118] Therefore, when the determination unit 55 determines that work is being performed in the second area 92 of the construction site 90 based on the acquired location information (second area in S62), even if second notification information is acquired from the second fire alarm 20, it treats this as invalid notification information (S64) and determines that no fire has occurred at the construction site 90. On the other hand, when the determination unit 55 determines that work is being performed in the second area 92, if the determination unit 55 acquires first notification information from the first fire alarm 20, it treats this as valid notification information and determines that a fire has occurred at the construction site 90.

[0119] In this way, the construction work support system 10 can prevent the occurrence of false alarms by disabling one of two fire alarms 20 installed at the same construction site 90 and enabling the other based on location information.

[0120] [Other variations] The functional configuration of the construction work support system 10 described in the above-mentioned first embodiment is an example. For example, if the communication unit 23 of the fire alarm 20 and the sensor device 60 are communication circuits that can directly connect to the base station 40 without going through the repeater 30, the construction work support system 10 does not need to include the repeater 30. FIG. 15 is a block diagram showing the functional configuration of the construction work support system 10 that does not include the repeater 30.

[0121] In this way, if the construction work support system 10 does not include the repeater 30, there is no need to attach the repeater 30 to the stand 80 in Figure 2, making it possible to make the stand 80 smaller and simpler.

[0122] (Embodiment 2) [composition] The following describes the configuration of the construction work support system according to the embodiment 2. Fig. 16 is a block diagram showing the functional configuration of the construction work support system according to the embodiment 2.

[0123] As shown in FIG. 16, the construction work support system 10a includes a plurality of fire alarms 20a, a repeater 30, a base station 40, a server device 50, and an information terminal 70. The construction work support system 10a does not include a sensor device 60. However, the fire alarm 20a includes an environmental sensor 22 that corresponds to the environmental sensor 61 included in the sensor device 60. Like the environmental sensor 61, the environmental sensor 22 is specifically a temperature sensor, a humidity sensor, a dust sensor (in other words, a particulate matter concentration sensor), an image sensor (in other words, a camera), a gas sensor, or the like. The environmental sensor 22 is housed in a main body 27.

[0124] [Fire alarm installation status] The installation manner of the fire alarm 20a is similar to that of the fire alarm 20 in the first embodiment, and therefore a detailed description thereof will be omitted. In the second embodiment, the stand 80 does not necessarily have to include the second mounting plate 83.

[0125] [Example 1 of fire notification behavior] Next, a description will be given of a fire occurrence notification operation of the construction work support system 10a. Fig. 17 is a sequence diagram of an example 1 of a fire occurrence notification operation of the construction work support system 10a.

[0126] When the acquisition unit 24a of the fire alarm 20a determines that the smoke level (amount of smoke) sensed by the smoke sensor 21 is above a threshold (S71), it acquires environmental information indicating the environment sensed by the environmental sensor 22 (S72).

[0127] The determination unit 24b determines whether the environment indicated by the environmental information satisfies a predetermined requirement (S73). The predetermined requirement is the same as that in the first embodiment.

[0128] If it is determined in step S73 that the predetermined requirements regarding the environmental information are not met, the processes in steps S74 and after are not performed. In other words, even if the smoke level is equal to or higher than the threshold, if the predetermined requirements regarding the environmental information are not met, it is determined that no fire has occurred.

[0129] On the other hand, when it is determined in step S73 that the predetermined requirements are satisfied, the determination unit 24b activates the notification unit 26 to notify the workers at the construction site 90 of the occurrence of a fire (S74). The workers are notified by at least one of sound and light.

[0130] In addition, determination unit 24b uses communication unit 23 to transmit the notification information to server device 50 (S75). Although not shown in detail in FIG. 17, the notification information is transmitted to server device 50 via relay 30 and base station 40.

[0131] The communication unit 51 of the server device 50 receives the notification information. The information processing unit 52 uses the communication unit 51 to transmit the received notification information to the information terminal 70 that has been registered in advance (S76).

[0132] The information terminal 70 receives the notification information, and based on the received notification information, displays a notification screen (such as FIG. 7) for notifying that a fire has broken out at the construction site 90 on the display unit 71 provided in the information terminal 70 (S77). In addition to displaying the notification screen, the information terminal 70 may output a notification sound from a speaker (not shown) provided in the information terminal 70 for notifying that a fire has broken out at the construction site 90.

[0133] Thus, in the construction work support system 10a, the fire alarm 20a determines whether or not a fire has occurred based on the detection results of the smoke sensor 21 and the detection results of the environmental sensor 22. As a result, the construction work support system 10a can reduce the occurrence of false alarms compared to a system that determines whether or not a fire has occurred based only on the detection results of the smoke sensor 21.

[0134] [Example 2 of fire notification behavior] In example 1 of the operation of notifying the occurrence of a fire, the determination as to whether or not a fire has occurred is made by the fire alarm 20a, but this determination may also be made by the server device 50. Hereinafter, an example 2 of such an operation of notifying the occurrence of a fire in the construction work support system 10a will be described. Fig. 18 is a sequence diagram of example 2 of the operation of notifying the occurrence of a fire in the construction work support system 10a.

[0135] The control unit 24 of the fire alarm 20a uses the communication unit 23 to transmit to the server device 50 smoke level information indicating the smoke level (amount of smoke) sensed by the smoke sensor 21 and environmental information indicating the environment sensed by the environmental sensor 22 (S81). Although not shown in detail in FIG. 18, the smoke level information and environmental information are transmitted to the server device 50 via the repeater 30 and the base station 40.

[0136] The communication unit 51 of the server device 50 receives the smoke level information and the environmental information, and the acquisition unit 54 acquires the smoke level information and the environmental information received by the communication unit 51 (S82).

[0137] The determination unit 55 determines whether or not the smoke level indicated by the smoke level information is equal to or greater than a threshold value and the environment indicated by the environment information satisfies a predetermined requirement (S83). The predetermined requirement is the same as in the first embodiment.

[0138] If it is determined in step S83 that the smoke level indicated by the smoke level information is below the threshold, and if it is determined in step S83 that the environment indicated by the environmental information does not satisfy the predetermined requirement, the processes in and after step S84 are not performed. On the other hand, if it is determined in step S83 that the predetermined requirement is satisfied, the determination unit 55 uses the communication unit 51 to transmit an alarm command to the fire alarm 20a (S84).

[0139] The communication unit 23 of the fire alarm 20a receives the notification command. The control unit 24 activates the notification unit 26 to notify the workers at the construction site 90 of the occurrence of a fire (S85). The workers are notified by at least one of sound and light.

[0140] Furthermore, the determination unit 55 uses the communication unit 51 to transmit the received notification information to the information terminal 70 that has been registered in advance (S86).

[0141] The information terminal 70 receives the notification information, and based on the received notification information, displays a notification screen (such as FIG. 7) for notifying that a fire has broken out at the construction site 90 on the display unit 71 provided in the information terminal 70 (S87). In addition to displaying the notification screen, the information terminal 70 may output a notification sound from a speaker (not shown) provided in the information terminal 70 for notifying that a fire has broken out at the construction site 90.

[0142] In this way, in the construction work support system 10a, the server device 50 determines whether or not a fire has occurred based on the smoke level information and environmental information acquired from the fire alarm 20a. As a result, the construction work support system 10a can reduce the occurrence of false alarms compared to a system that determines whether or not a fire has occurred based only on the detection result of the smoke sensor 21.

[0143] [Example 1 of notification for maintenance information] Next, a notification operation of the construction work support system 10a regarding information on maintenance will be described. Fig. 19 is a sequence diagram of an example 1 of the notification operation of the construction work support system 10a regarding information on maintenance. In the following, the environment sensor 22 will be described as a dust sensor.

[0144] The acquisition unit 24a of the fire alarm 20a acquires dust level information indicating the dust level sensed by the environmental sensor 22 (S91).

[0145] The determination unit 24b determines whether the dust level indicated by the acquired dust level information is equal to or higher than a threshold (S92), and accumulates the time during which it is determined that the dust level is equal to or higher than the threshold, and stores the accumulated time in the storage unit 25 (S93). The processes of steps S91 to S93 are periodically repeated.

[0146] Thereafter, when the determination unit 24b determines that the accumulated time has reached a predetermined value (S94), it transmits information related to maintenance to the server device 50 using the communication unit 23 (S95). Although not shown in detail in FIG. 19, the information related to maintenance is transmitted to the server device 50 via the repeater 30 and the base station 40.

[0147] The communication unit 51 of the server device 50 receives the information regarding the maintenance. The information processing unit 52 uses the communication unit 51 to transmit the received information regarding the maintenance to the information terminal 70 that has been registered in advance (S96).

[0148] The information terminal 70 receives the information regarding maintenance, and displays a notification screen (FIG. 10, etc.) indicating the time for maintenance on the display unit 71 provided in the information terminal 70 based on the received information regarding maintenance (S97).

[0149] In this way, in the construction work support system 10a, the fire alarm 20a determines whether or not maintenance is necessary based on the dust level information acquired from the environmental sensor 22. As a result, the construction work support system 10a can provide the user of the information terminal 70 with information regarding the maintenance of the equipment installed at the construction site 90 based on the dust level information.

[0150] In addition to the dust level information, the environmental information used to transmit the information regarding maintenance may also include temperature information. For example, devices are prone to deterioration in high or low temperature environments, leading to an increased failure rate. Therefore, instead of the dust level information, the determination unit 24b may accumulate the time during which the temperature satisfies a predetermined requirement, and transmit the information regarding maintenance to the server device 50 using the communication unit 23 when the accumulated time reaches a predetermined value.

[0151] [Example 2 of notification for maintenance information] In example 1 of the operation of notifying information regarding maintenance, the determination as to whether or not maintenance is necessary is made by the fire alarm 20a, but this determination may be made by the server device 50. Hereinafter, example 2 of such an operation of notifying information regarding maintenance of the construction work support system 10a will be described. Fig. 20 is a sequence diagram of example 2 of the operation of notifying information regarding maintenance of the construction work support system 10a. In the following, the environmental sensor 22 will be described as a dust sensor.

[0152] The fire alarm device 20a transmits dust level information indicating the dust level sensed by the environmental sensor 22 to the server device 50 (S101). Although not shown in detail in FIG. 20, the dust level information is transmitted to the server device 50 via the repeater 30 and the base station 40.

[0153] The communication unit 51 of the server device 50 receives the dust level information, and the acquisition unit 54 acquires the received dust level information (S102).

[0154] The determination unit 55 determines whether the dust level indicated by the acquired dust level information is equal to or higher than a threshold (S103), and accumulates the time during which it is determined that the dust level is equal to or higher than the threshold, and stores the accumulated time in the storage unit 25 (S104). The processes of steps S101 to S104 are periodically repeated.

[0155] Thereafter, when the determining unit 55 determines that the accumulated time has reached a predetermined value (S105), it transmits information related to maintenance to the information terminal 70 that has been registered in advance, using the communication unit 51 (S106).

[0156] The information terminal 70 receives the information regarding maintenance, and displays a notification screen (FIG. 10, etc.) indicating the time for maintenance on the display unit 71 provided in the information terminal 70 based on the received information regarding maintenance (S107).

[0157] In this way, in the construction work support system 10a, the server device 50 determines whether or not maintenance is necessary based on the dust level information acquired from the fire alarm 20a. This allows the construction work support system 10a to provide the user of the information terminal 70 with information regarding the maintenance of the equipment installed at the construction site 90 based on the dust level information.

[0158] In addition to dust level information, temperature information can also be used as environmental information for outputting information related to maintenance. For example, devices are prone to deterioration in high or low temperature environments, leading to an increased failure rate. Therefore, instead of dust level information, the determination unit 55 may accumulate the time during which the temperature satisfies a predetermined requirement, and when the accumulated time reaches a predetermined value, the determination unit 55 may transmit information related to maintenance to the information terminal 70 using the communication unit 51.

[0159] [Variations] The functional configuration of the construction work support system 10a described in the above-mentioned second embodiment is an example. For example, if the communication unit 23 of the fire alarm 20 is a communication circuit that can directly connect to the base station 40 without going through the repeater 30, the construction work support system 10a does not need to include the repeater 30. FIG. 21 is a block diagram showing the functional configuration of the construction work support system 10a that does not include the repeater 30.

[0160] In this way, when the construction work support system 10a does not include the repeater 30, there is no need to attach the repeater 30 to the stand 80 in FIG. 2, and the stand 80 can be made smaller and simpler.

[0161] (Effects, etc.) Hereinafter, examples of inventions that can be obtained from the disclosure of this specification will be given, and the effects and the like that can be obtained from the inventions will be described.

[0162] Invention 1 is a disaster prevention system including an acquisition unit 54 that acquires first detection information from a first detector installed at a construction site 90 and acquires second detection information from a second detector installed below the first detector at the construction site 90, and a determination unit 55 that determines whether or not a fire has occurred at the construction site 90 based on the first detection information and the second detection information. The first fire alarm 20 of the above embodiment is an example of a first detector, and the first notification information is an example of the first detection information. The second fire alarm 20 of the above embodiment is an example of a second detector, and the second notification information is an example of the second detection information. The construction work support system 10 is an example of a disaster prevention system. The construction work support system 10 of the above embodiment is an example of a disaster prevention system.

[0163] Such a disaster prevention system 20 can reduce false alarms by determining whether or not a fire has occurred based on (at least) two pieces of detection information, the first detection information and the second detection information.

[0164] Invention 2 is a disaster prevention system of Invention 1, in which the judgment unit 55 judges that no fire has occurred at the construction site 90 if only the first detection information or the second detection information is acquired within a specified period, and judges that a fire has occurred at the construction site 90 if both the first detection information and the second detection information are acquired within a specified period.

[0165] Such a disaster prevention system can reduce false alarms by determining that a fire has occurred on the condition that both the first detection information and the second detection information have been acquired within a predetermined period of time.

[0166] Invention 3 is the disaster prevention system of Invention 2, in which one of the first detector and the second detector detects smoke, and the other of the first detector and the second detector detects a specified gas.

[0167] Such a disaster prevention system can reduce false alarms by determining whether a fire has occurred based on (at least) two types of detection information: detection information indicating the detection results of smoke and detection information indicating the detection results of a specified gas.

[0168] Invention 4 is a disaster prevention system of Invention 1, in which the first detector and the second detector both detect smoke, the acquisition unit 54 further acquires location information regarding the location where work is being performed at the construction site 90, and if the determination unit 55 determines that work is being performed in a first area 91 of the construction site 90 based on the acquired location information, it determines that no fire has occurred at the construction site 90 even if the first detection information has been acquired, and if the determination unit 55 determines that work is being performed in a second area 92 located below the first area 91 of the construction site 90 based on the acquired location information, it determines that no fire has occurred at the construction site 90 even if the second detection information has been acquired.

[0169] This type of disaster prevention system can reduce false alarms by invalidating detection information transmitted by detectors installed in locations prone to dust generation.

[0170] Invention 5 is a detector installed at a construction site 90, comprising an acquisition unit 24a that acquires first detection information of another detector from another detector installed at the construction site 90, and a determination unit 24b that determines whether a fire has occurred at the construction site 90 based on the acquired first detection information and the second detection information of the detector. The fire alarm 20 of the above embodiment is an example of a detector and another detector. Invention 1 corresponds to the fire alarm 20 when the sensor device 60 is replaced with another fire alarm 20 in Example 1 of the notification operation of the occurrence of a fire of the above embodiment 1, for example, based on the description of Modification 1 of the notification operation of the occurrence of a fire of the above embodiment 1.

[0171] Such a detector can reduce false alarms by determining whether or not a fire has occurred based on (at least) two pieces of detection information: first detection information from another detector and its own second detection information.

[0172] Invention 6 is the detector of invention 5, wherein the detector and another detector detect smoke.

[0173] Such a detector can reduce false alarms by determining whether or not a fire has occurred based on (at least) two pieces of detection information indicating the results of smoke detection.

[0174] Invention 7 is the detector of Invention 5, in which one of the detector and the other detector detects smoke, and the other of the detector and the other detector detects a specified gas.

[0175] Such a detector can reduce false alarms by determining whether a fire has occurred based on (at least) two types of detection information: detection information indicating the detection result of smoke and detection information indicating the detection result of a specified gas.

[0176] Invention 8 is a detector system comprising a detector according to any one of Inventions 5 to 7 and another detector.

[0177] Such a detector system can reduce false alarms by determining whether or not a fire has occurred based on (at least) two pieces of detection information.

[0178] Invention 9 is the detector system of Invention 8, further comprising a repeater 30 that relays information transmitted by the detector when it is determined by the determination unit 24b that a fire has occurred. The notification information of the above embodiment is an example of information transmitted by the detector when it is determined that a fire has occurred.

[0179] Such a detector system can use the repeater 30 to transmit information outside the construction site 90 if it determines that a fire has occurred.

[0180] Invention 10 is a disaster prevention method executed by a computer, including an acquisition step of acquiring first detection information from a first detector installed at a construction site 90 and acquiring second detection information from a second detector installed below the first detector at the construction site 90, and a determination step of determining whether or not a fire has occurred at the construction site 90 based on the first detection information and the second detection information.

[0181] Such a disaster prevention method can reduce false alarms by determining whether or not a fire has occurred based on (at least) two pieces of detection information, the first detection information and the second detection information.

[0182] Invention 11 is a program for causing a computer to execute the disaster prevention method of Invention 10.

[0183] According to such a program, the computer can reduce false alarms by determining whether or not a fire has occurred based on (at least) two pieces of detection information, the first detection information and the second detection information.

[0184] (Other embodiments) Although the embodiment has been described above, the present invention is not limited to the above embodiment.

[0185] For example, in the above embodiment, the construction work support system is realized by a plurality of devices. In this way, when the construction work support system is configured by a plurality of devices, the components (particularly functional components) of the construction work support system may be allocated in any manner to the plurality of devices. In other words, a process executed by one device among the plurality of devices of the construction work support system may be executed by another device among the plurality of devices. The same applies to other systems such as a disaster prevention system.

[0186] The construction work support system may be realized by a single device. For example, the construction work support system may be realized as a single device corresponding to the server device of the above embodiment. The same applies to other systems such as a disaster prevention system.

[0187] Furthermore, the method of communication between the devices in the above-described embodiment is not particularly limited. In addition, a repeater (such as a broadband router) (not shown) may be involved in the communication between the devices.

[0188] In the above embodiment, the processes executed by a specific processing unit may be executed by another processing unit. The order of multiple processes may be changed, or multiple processes may be executed in parallel.

[0189] In the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

[0190] Furthermore, each component may be realized by hardware. For example, each component may be a circuit (or an integrated circuit). These circuits may form a single circuit as a whole, or each may be a separate circuit. Furthermore, each of these circuits may be a general-purpose circuit, or a dedicated circuit.

[0191] Furthermore, the general or specific aspects of the present invention may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0192] For example, the present invention may be realized as a method executed by a computer such as a construction work support system, or as a program for causing a computer system to execute the method. Furthermore, the present invention may be realized as a computer-readable non-transitory recording medium having such a program recorded thereon.

[0193] In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art may think of, or forms realized by arbitrarily combining the components and functions of each embodiment within the scope that does not deviate from the spirit of the present invention. [Explanation of symbols]

[0194] 10, 10a Construction work support system 20, 20a fire alarm 21 Smoke sensor 22, 61 Environmental sensors 23, 51 Communications Department 24 Control Unit 24a, 54 acquisition part 24b, 55 Judgment section 25, 53 Storage section 26. Notification Department 27 Main body 28 Base 29 Mounting part 30 Repeater 40 base station 50 Server equipment 52 Information Processing Section 60 Sensor Equipment 70 Information terminal 71 Display section 80 Stand 81 Paul 82 First mounting plate 83 Second mounting plate 90 Construction Site 91 Area 1 92 Area 2

Claims

1. an acquisition unit that acquires first detection information from a first detector installed at a construction site and acquires second detection information from a second detector installed below the first detector at the construction site; a determination unit that determines whether or not a fire has occurred at the construction site based on the first detection information and the second detection information. Disaster prevention system.

2. The determination unit is When only one of the first detection information and the second detection information is acquired within a predetermined period of time, it is determined that no fire has occurred at the construction site; If both the first detection information and the second detection information are acquired within the predetermined period, it is determined that a fire has occurred at the construction site. The disaster prevention system according to claim 1 .

3. one of the first detector and the second detector detects smoke; The other of the first detector and the second detector detects a predetermined gas. The disaster prevention system according to claim 2.

4. both the first detector and the second detector detect smoke; The acquisition unit further acquires location information regarding a location where work is performed at the construction site, The determination unit is When it is determined that work is being performed in a first area of ​​the construction site based on the acquired location information, it is determined that no fire has occurred in the construction site even if the first detection information is acquired; When it is determined based on the acquired location information that work is being performed in a second area located below the first area of ​​the construction site, it is determined that no fire has occurred at the construction site even if the second detection information is acquired. The disaster prevention system according to claim 1 .

5. A detector installed at a construction site, an acquisition unit that acquires first detection information of another detector from the other detector installed at the construction site; and a determination unit that determines whether or not a fire has occurred at the construction site based on the acquired first detection information and the second detection information of the detector. Detector.

6. The detector and the other detector detect smoke.

6. A detector as claimed in claim 5.

7. one of the detector and the other detector detects smoke; The other of the detector and the other detector detects a predetermined gas.

6. A detector as claimed in claim 5.

8. A detector according to any one of claims 5 to 7; The other detector is provided. Detector system.

9. The fire alarm system further includes a repeater that repeats information transmitted by the detector when the determination unit determines that a fire has occurred.

9. A detector system according to claim 8.

10. 1. A computer-implemented disaster prevention method, comprising: an acquisition step of acquiring first detection information from a first detector installed at a construction site and acquiring second detection information from a second detector installed below the first detector at the construction site; and a determination step of determining whether or not a fire has occurred at the construction site based on the first detection information and the second detection information. Disaster prevention methods.

11. A program for causing a computer to execute the disaster prevention method according to claim 10.

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