Management System

Abstract

To provide a management system which can improve a management property of a fire detector.SOLUTION: A management system 1 comprises: a plurality of fire detectors 10 which have light reception windows and detect a fire of a monitoring area on the basis of light received from the outside via the light reception windows; and a controller 50 communicably connected with each of the plurality of fire detectors 10. Each of the plurality of fire detectors 10 or the controller 50 comprises a detection unit which detects contamination degrees of the light reception windows of the fire detectors 10, the controller 50 comprises: a display control unit which displays the contamination degrees detected by the detection unit on a display unit of the controller 50; and a specification unit which specifies zero frequencies as frequencies that the contamination degree of each of the plurality of fire detectors 10 becomes a zero value, and the display control unit displays identification information of the fire detectors corresponding to the zero frequencies on the display unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a management system. [Background technology]

[0002] A technology has been proposed for detecting the degree of contamination (hereinafter referred to as "contamination level") of multiple fire detectors in a fire detection system installed in a tunnel and equipped with multiple fire detectors and receivers. In this technology, for example, each fire detector includes a translucent window and a contamination level detection unit that detects the degree of contamination of the translucent window, the contamination level detection unit having a light-emitting unit that emits light and a light-receiving unit that receives light incident from a light source through the translucent window. When detecting the degree of contamination of multiple fire detectors (specifically, the translucent windows), first, in each fire detector, the light-emitting unit receives light through the translucent window, and then a light-attenuation rate is calculated based on the amount of light received. Information indicating the calculated light-attenuation rate is then sent to the receiver. Next, when the receiver receives the above information (i.e., information indicating the dimming rate) from multiple fire detectors, it stores the information in a memory unit and, based on the dimming rate of the above information, outputs an alarm indicating that normal monitoring is not possible or performs abnormality processing (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-246552 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned conventional technology, as mentioned above, the receiver only stores information indicating the dimming rate in a memory unit and outputs the above-mentioned alarm or performs abnormality processing, so it is difficult for the user to easily understand how the contamination of each fire detector has progressed, and there is room for improvement from the perspective of manageability of fire detection devices such as fire detectors.

[0005] The present invention has been made in view of the above problems, and has an object to provide a management system that can improve the manageability of fire detection devices. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, the management system according to claim 1 is a management system including a plurality of fire detection devices each having a light receiving window and detecting a fire in a monitoring area based on light received from the outside through the light receiving window, and a control device communicably connected to each of the plurality of fire detection devices, wherein each of the plurality of fire detection devices or the control device is provided with a detection means for detecting a degree of contamination of the light receiving window of each of the fire detection devices, and the control device is provided with a display control means for displaying the degree of contamination detected by the detection means on a display means, and a display control means for displaying the degree of contamination for each of the fire detection devices based on contamination degree history information which is history information of the degree of contamination detected by the detection means. and an estimation means for estimating a timing at which the degree of contamination reaches a predetermined contamination state, wherein the contamination level history information includes contamination level information indicating the degree of contamination detected by the detection means, recording date information indicating the date when the contamination level information was recorded, and recording time information indicating the time when the contamination level information was recorded, and the estimation means estimates the timing of contamination based on a rate of change in the degree of contamination for each predetermined time calculated based on the contamination level information, the recording date information, and the recording time information, and the display control means displays the contamination timing estimated by the estimation means and identification information of the fire detection device corresponding to the timing of contamination on the display means in association with each other. The fire detection system further includes a determination means for determining whether or not a predetermined abnormality is likely to have occurred in any of the plurality of fire detection devices based on the contamination level history information, and the determination means refers to the contamination level information, the recording date information, and the recording time information, and determines whether or not the abnormality is likely to have occurred based on whether or not the period of the fluctuation cycle in which the contamination level becomes equal to or greater than a threshold value after reaching zero is shorter than a predetermined value, or whether or not the amount of fluctuation in the contamination level within a predetermined period is smaller than a predetermined value, and when the determination means determines that the abnormality is likely to have occurred, the display control means causes the display means to display information to notify that fact. [Effects of the Invention]

[0009] According to the management system of claim 1, the progress of the contamination of the fire detection device can be monitored by the user. This makes it possible to easily grasp the status of fires, thereby improving the manageability of fire detection devices. In addition, the timing of contamination of a specific fire detection device can be presented. For example, The user must take measures to clean the fire detection device before the degree of contamination of the device reaches or exceeds the threshold. It will be possible to give lectures. In addition, it is possible to indicate that there may be an abnormality in one of multiple fire detection devices, and for example, the user can take predetermined measures (e.g., checking the fire detection device) for the fire detection device that may be experiencing an abnormality. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram conceptually illustrating a management system according to an embodiment. [Figure 2] FIG. 2 is a block diagram showing the electrical configuration of the fire detection device. [Figure 3] FIG. 2 is a block diagram showing the electrical configuration of a control device. [Figure 4] FIG. 10 is a diagram illustrating an example of the configuration of a history DB. [Figure 5] 4 is a flowchart of a control process according to the embodiment. [Figure 6] 10 is a flowchart of a contamination level detection process. [Figure 7] 10 is a flowchart of a display process. [Figure 8] 10 is a flowchart of a recording process. DETAILED DESCRIPTION OF THE INVENTION

[0013] The following describes in detail an embodiment of a management system according to the present invention with reference to the drawings. First, [I] the basic concept of the embodiment is explained, then [II] specific details of the embodiment are explained, and finally, [III] modifications to the embodiment are explained. However, the present invention is not limited to the embodiment.

[0014] [I] Basic Concept of the Embodiment First, the basic concept of the embodiment will be described. The embodiment generally relates to a management system including a plurality of fire detection devices that detect fires in a monitored area, and a control device that is communicably connected to each of the plurality of fire detection devices.

[0015] Here, in the embodiment, the term "fire detection device" refers to a device that optically detects and reports a fire in a monitored area, and is a concept that includes, for example, optical fire detectors and fire alarms. The term "monitored area" refers to an area to be monitored, and is a concept that includes, for example, an area inside a structure and an area outside a structure. The term "structure" refers to any specific structure or type, and is a concept that includes, for example, architectural structures such as detached houses, apartment buildings (e.g., condominiums), office buildings, public facilities, and commercial facilities, as well as civil engineering structures such as tunnels. The term "report" refers to, for example, outputting predetermined information to a control device, displaying or outputting predetermined information via an output means (display means or audio output means), and the like. The term "control device" refers to a device that controls multiple fire detection devices, and is a concept that includes, for example, a disaster prevention receiver that performs disaster prevention processing based on outputs from multiple fire detection devices, and a management server that collects various information from multiple fire detection devices. In the following embodiment, we will explain the case where the ``fire detection device'' is an ``optical fire detector,'' the ``monitoring area'' is the ``area inside the tunnel,'' and the ``control device'' is a ``disaster prevention receiver.''

[0016] [II] Specific details of the embodiment Next, specific details of the embodiment will be described.

[0017] (composition) First, the configuration of a management system according to an embodiment will be described. Fig. 1 is a conceptual diagram of a management system according to an embodiment. In the following description, the X direction in Fig. 1 will be referred to as the left-right direction of the management system (the +X direction will be the left direction of the management system, and the -X direction will be the right direction of the management system), the Y direction in Fig. 1 will be referred to as the up-down direction of the management system (the +Y direction will be the up direction of the management system, and the -Y direction will be the down direction of the management system), and the direction perpendicular to the X and Y directions will be referred to as the front-rear direction of the management system.

[0018] The management system 1 is a system for managing fire detection devices 10, and includes a plurality of fire detection devices 10 and a control device 50, as shown in FIG.

[0019] Here, the locations where the components of the management system 1 are installed are arbitrary, but in the embodiment, the multiple fire detection devices 10 are installed inside the structure 2 (tunnel), for example, in a position where it is difficult for people inside the structure 2 to reach them. Furthermore, the control device 50 is installed outside (or inside) the structure 2, for example, in a position where it can be operated by a manager (user) of the structure 2. Furthermore, the connection form of each device is arbitrary, but in the embodiment, as shown in FIG. 1, the control device 50 is electrically connected to each of the multiple fire detection devices 10 via wiring 3. This allows communication between the control device 50 and each of the multiple fire detection devices 10, and also allows power to be supplied from the control device 50 to each of the multiple fire detection devices 10.

[0020] (Configuration - Fire detection device) Next, the configuration of the plurality of fire detection devices 10 will be described. Fig. 2 is a block diagram showing the electrical configuration of the fire detection device 10. The plurality of fire detection devices 10 are devices that detect fires in a monitored area. These plurality of fire detection devices 10 are provided inside the structure 2 at positions on the upper part of the wall of the structure 2 (or on the ceiling, not shown), and specifically, are arranged side by side at intervals from each other along the direction of travel of the structure 2. Furthermore, as shown in Fig. 2, each of the plurality of fire detection devices 10 includes a housing (not shown), a light-emitting unit 20, a light-receiving unit 30, and a control unit 40.

[0021] (Configuration - Fire detection device - Housing) The housing is the basic structure of the fire detection device 10, and is a protective means for protecting the light receiving unit 30 and the control unit 40 from the outside. This housing is a hollow body made of, for example, a resin material with light blocking properties, and is formed to a size that can accommodate the light receiving unit 30 and the control unit 40, and is fixed to the wall of the structure 2 by a fixture or the like.

[0022] The housing is also provided with a light receiving window 11. The light receiving window 11 is a window that allows light (such as simulated light and light to be detected, which will be described later) from outside the fire detection device 10 (specifically, the housing) to enter toward the light receiving unit 30, and is made of a light-transmitting material (such as glass material), and is formed in a part of the housing that corresponds to the light receiving unit 30.

[0023] (Configuration - Fire detection device - Light emitting part) The light-emitting unit 20 is a light-emitting means that irradiates simulated light onto the light-receiving unit 30 through the light-receiving window 11. Here, the "simulated light" refers to light that is used to detect the degree of contamination of the fire detection device 10 (specifically, the light-receiving window 11) and that simulates a fire. The light-emitting unit 20 is configured using, for example, a known light-emitting element (an infrared LED, for example), and is provided outside the housing at a position where the simulated light from the light-emitting unit 20 can be incident on the light-receiving unit 30 through the light-receiving window 11, and is fixed to the housing by a fixture or the like.

[0024] (Configuration - Fire detection device - Light receiving unit) The light receiving unit 30 is a light receiving means that receives simulated light or light to be detected from outside the fire detection device 10. Here, "light to be detected" means light that is the object of detection in order to detect a fire that has occurred in the monitored area, and is a concept that includes, for example, infrared light. The light receiving unit 30 is configured using, for example, a known light receiving element (an infrared light receiving element, for example), and is provided inside the housing at a position where the simulated light and light to be detected can be incident, and is fixed to the housing by a fixture or the like.

[0025] (Configuration - Fire detection device - Control unit) The control unit 40 is a unit for controlling the fire detection device 10, and includes an operation unit, a communication unit, a display unit, a power supply unit, a control unit, and a storage unit (all of which are not shown).

[0026] (Configuration - Fire detection device - Control unit - Operation unit, communication unit, display unit, power supply unit) The operation unit is an operation means that receives operation inputs to the fire detection device 10. The communication unit is a communication means that communicates with the control device 50. The display unit is an output means that displays various information based on the control of the control unit, and is configured using, for example, LEDs. The power supply unit is a power supply means that supplies power supplied from the control device 50 to each part of the fire detection device 10.

[0027] (Configuration - Fire detection device - Control unit - Control unit) The control unit is a control means that controls the fire detection device 10. Specifically, this control unit is a computer that includes a CPU, various programs that are interpreted and executed on the CPU (including basic control programs such as an OS and application programs that are started on the OS and realize specific functions), and an internal memory such as a RAM for storing programs and various data (the same applies to the control unit 57 of the control device 50, which will be described later). Details of the processing executed by this control unit will be described later.

[0028] (Configuration - Fire detection device - Control unit - Memory unit) The memory unit is a storage means for storing programs and various data necessary for the operation of the fire detection device 10, and is constructed using a known rewritable recording medium, and a non-volatile recording medium such as a flash memory can be used (the same applies to the memory unit 58 of the control device 50 described later).

[0029] (Configuration-Controller) Next, the configuration of the control device 50 will be described. Fig. 3 is a block diagram showing the electrical configuration of the control device 50. The control device 50 is a device that performs predetermined processing based on signals received from a plurality of fire detection devices 10. This control device 50 is provided on a wall of the structure 2 outside (or inside) the structure 2, and as shown in Fig. 3, includes an operation unit 51, a communication unit 52, an alarm signal transmission unit 53, a display unit 54, an output unit 55, a power supply unit 56, a control unit 57, and a memory unit 58. Note that this control device 50 can be configured using, for example, a known disaster prevention receiver, and therefore detailed description thereof will be omitted.

[0030] (Configuration - Control device - Operation unit, communication unit, signal transmission unit, display unit, output unit, power supply unit) The operation unit 51 is an operation means for accepting operation inputs to the control device 50. The communication unit 52 is a communication means for communicating with each of the multiple fire detection devices 10. The alarm signal transmission unit 53 transmits a signal containing fire information indicating a fire alarm (hereinafter referred to as an "alarm signal") to the outside of the management system 1 via a reporting device (not shown). The display unit 54 is a display means for displaying various information under the control of the control unit 57, and is configured using known display means such as a flat panel display such as a liquid crystal display or an organic EL display. The output unit 55 is an output means for outputting various information to an external device (described later), and is configured using known output terminals, for example. The power supply unit 56 is a power supply means for supplying power from a commercial power source (not shown) to the multiple fire detection devices 10 and each unit of the control device 50.

[0031] (Configuration-Control device-Control unit) The control unit 57 is a control means for controlling the control device 50, and as shown in FIG. 3, functionally conceptually includes a detection unit 57a, a recording control unit 57b, a display control unit 57c, a display designation unit 57d, a recording designation unit 57e, an estimation unit 57f, and an identification unit 57g.

[0032] The detection unit 57a is a detection means for detecting the degree of contamination of the fire detection device 10 (specifically, the light receiving window 11).

[0033] The recording control unit 57b is a recording control means that, when the first recording timing described below arrives, records the degree of contamination detected by the detection unit 57a as the degree of contamination history information described below in the memory unit 58 of the control device 50 for each fire detection device identification information described below.

[0034] The display control unit 57c is a display control means that causes the display unit 54 of the control device 50 to display the soiling degree history information recorded in the storage unit 58 when a first display timing, which will be described later, arrives.

[0035] The display designation unit 57d is a display designation means for designating a display pattern for the soiling degree history information, which will be described later.

[0036] The recording designation unit 57e is a recording designation means for designating a recording pattern for the soiling degree history information, which will be described later.

[0037] The estimation unit 57f is an estimation means for estimating the contamination timing at which the contamination level of the fire detection device 10 specified by a predetermined method will become equal to or greater than a threshold level, based on the contamination level history information recorded in the storage unit 58. Note that this threshold level may be, for example, arbitrarily set by the user, or may be pre-stored in the storage unit 58 (the same applies to other threshold levels).

[0038] The identification unit 57g is an identification means for identifying the number of times that the contamination level has reached zero based on the contamination level history information recorded in the storage unit 58. Here, the "number of times that the contamination level has reached zero" means the number of times that the contamination level of each of the plurality of fire detection devices 10 has reached zero. This number of times that the contamination level has reached zero can be an index value indicating the possibility of a malfunction or failure of the fire detection device 10, or can also be an index value indicating the possibility of reducing the cleaning frequency of the fire detection device 10. Details of the processing executed by this control unit 57 will be described later.

[0039] (Configuration - Control Unit - Storage Unit) The storage unit 58 is a storage means for storing programs and various data necessary for the operation of the control device 50. As shown in Fig. 3, the storage unit 58 also includes a history database 58a (hereinafter, the database will be referred to as "DB").

[0040] (Configuration - Fire detection device - Control unit - Memory unit - History DB) The history DB 58a is a pollution level history information storage means for storing pollution level history information, where "pollution level history information" is information indicating the history of the pollution level detected by the detection unit 57a.

[0041] FIG. 4 is a diagram illustrating an example of the configuration of the history DB 58a. As illustrated in FIG. 4, the history DB 58a is configured by associating the items "No.", "Date," "Time," "Address," and "Level of Contamination" with information corresponding to each item. Here, the information corresponding to the item "No." is recording order information indicating the recording order in which the below-described contamination level information was recorded, and corresponds to, for example, "1," "2," and the like, which are the recording orders shown in FIG. 4. Furthermore, the information corresponding to the item "Date" is recording date information indicating the date in which the below-described contamination level information was recorded, and corresponds to, for example, the date "2017 / 8 / 8" (indicating August 8, 2017) shown in FIG. 4. Furthermore, the information corresponding to the item "Time" is recording time information indicating the time in which the below-described contamination level information was recorded, and corresponds to, for example, the time "10:52:02" (indicating 10:52 minutes and 2 seconds) shown in FIG. 4. Furthermore, information corresponding to the item "address" is fire detection device identification information for uniquely identifying the fire detection device 10 corresponding to the contamination level information described below, and corresponds, for example, to "ABCyama TN001 right eye", which is the address of the fire detection device 10 shown in Fig. 4. Furthermore, information corresponding to the item "contamination level" is contamination level information indicating the contamination level detected by the detection unit 57a, and corresponds, for example, to "30%", which is the contamination level shown in Fig. 4.

[0042] As described above, since the control device 50 is a disaster prevention receiver, it is not necessary to provide both the control device 50 and the disaster prevention receiver, and therefore the installation cost of the management system 1 can be reduced.

[0043] (control processing) Next, a control process executed by the management system 1 configured as described above will be described. Fig. 5 is a flowchart of the control process according to the embodiment (in the following description of each process, steps are abbreviated as "S"). The control process is generally a process for controlling the plurality of fire detection devices 10. This control process can be executed at any timing, but in the embodiment, it will be described as being started after the plurality of fire detection devices 10 and the control device 50 are powered on.

[0044] When the control process is activated, as shown in Fig. 5, the control unit 57 of the control device 50 executes the fire detection process at SA1. Here, the method of executing the fire detection process is arbitrary, and may be executed, for example, as follows. That is, first, the control unit 57 of the control device 50 causes the light-receiving unit 30 of each fire detection device 10 to receive detection target light from outside the fire detection device 10 without causing the light-emitting unit 20 of each fire detection device 10 to emit imitation light. Then, in each fire detection device 10, the presence or absence of a fire is determined based on the amount of light received by the light-receiving unit 30, and if a signal indicating that a fire has been detected (hereinafter referred to as a "fire signal") is transmitted, the control unit 57 of the control device 50 executes fire extinguishing process using a predetermined fire extinguishing facility (not shown) at the timing of receiving this fire signal, and then ends the fire detection process. On the other hand, if a fire signal is not transmitted from each fire detection device 10 and a fire signal is not received even after a predetermined time has elapsed, the control unit 57 of the control device 50 terminates the fire detection process without performing the above-mentioned fire extinguishing process.

[0045] In SA2, the control unit 57 of the control device 50 determines whether a recording timing (hereinafter referred to as "first recording timing") for recording the degree of contamination in the storage unit 58 has arrived. The method of determining whether the first recording timing has arrived is arbitrary. For example, the determination may be made based on whether a predetermined time has elapsed since the control process was started, whether a predetermined time has elapsed since it was determined in SA8 described below that a termination timing (described below) has not arrived, or whether a predetermined operation has been accepted via the operation unit 51. Here, it is determined that the first recording timing has arrived if a predetermined time has elapsed since the control process was started, if a predetermined time has elapsed since it was determined that a termination timing (described below) has not arrived, or if a predetermined operation has been accepted. It is determined that the first recording timing has not arrived if a predetermined time has not elapsed since the control process was started, if a predetermined time has not elapsed since it was determined that a termination timing (described below) has not arrived, or if a predetermined operation has not been accepted. If it is determined that the first recording timing has arrived (SA2, Yes), the control unit 57 of the control device 50 starts a contamination level detection process (SA3), and if it is determined that the first recording timing has not arrived (SA2, No), the control unit 57 proceeds to SA4. The details of the contamination level detection process will be described later.

[0046] In SA4, the control unit 57 of the control device 50 determines whether a display timing (hereinafter referred to as the "first display timing") for displaying the soiling level history information has arrived. The method for determining whether the first display timing has arrived is arbitrary. For example, the determination may be based on whether a predetermined operation has been accepted via the operation unit 51, or whether a predetermined time has elapsed since the processing in SA3 ended. Here, if the predetermined operation has been accepted or the predetermined time has elapsed, the control unit 57 determines that the first display timing has arrived. If the predetermined operation has not been accepted or the predetermined time has not elapsed, the control unit 57 determines that the first display timing has not arrived. If the control unit 57 of the control device 50 determines that the first display timing has arrived (SA4, Yes), it starts a display process (SA5). If the control unit 57 determines that the first display timing has not arrived (SA4, No), it proceeds to SA6. Details of the display process will be described later.

[0047] In SA6, the control unit 57 of the control device 50 determines whether a recording timing (hereinafter referred to as a "second recording timing") for recording the contamination level history information in an external device (not shown) has arrived. Here, the "external device" refers to a device or equipment other than the devices constituting the management system 1, and is a concept that includes, for example, an electrical recording medium such as a USB memory or an SD card, a mobile terminal, a management server, etc. Furthermore, the method for determining whether the second recording timing has arrived is arbitrary. For example, the determination may be made based on whether the external device and the output unit 55 of the control device 50 are directly or indirectly connected. If the external device and the output unit 55 are connected, the control unit 57 determines that the second recording timing has arrived. If the external device and the output unit 55 are not connected, the control unit 57 determines that the second recording timing has not arrived. If the control unit 57 determines that the second recording timing has arrived (SA6, Yes), the control unit 57 starts a recording process (SA7). If the control unit 57 determines that the second recording timing has not arrived (SA6, No), the control unit 57 proceeds to SA8. The details of the recording process will be described later.

[0048] In SA8, the control unit 57 of the control device 50 determines whether the timing to end the control process (hereinafter referred to as the "end timing") has arrived. The method for determining whether the end timing has arrived is arbitrary, but for example, the determination may be made based on whether a predetermined operation has been performed by the administrator via the operation unit 51. If the predetermined operation has been performed, the control unit 57 determines that the end timing has arrived, and if the predetermined operation has not been performed, the control unit 57 determines that the end timing has not arrived. If the control unit 57 of the control device 50 determines that the end timing has not arrived (SA8, No), it proceeds to SA1, and repeats the processes from SA1 to SA8 until it determines in SA8 that the end timing has arrived. On the other hand, if it determines that the end timing has arrived (SA8, Yes), the control unit 57 ends the control process.

[0049] (Control processing - Degree of contamination detection processing) Next, a description will be given of the contamination level detection process of SA3 in Fig. 5. Fig. 6 is a flowchart of the contamination level detection process. The contamination level detection process is a process for detecting and recording the contamination level of each fire detection device 10.

[0050] When the contamination level detection process is started, the control unit 57 of the control device 50 causes the light emitting unit 20 of each fire detection device 10 to emit simulated light at SB1, as shown in FIG.

[0051] In SB2, the control unit 57 of the control device 50 determines whether or not a light reception signal has been acquired from each fire detection device 10. Here, the "light reception signal" is a signal indicating the amount of light received by the light receiving unit 30 of the fire detection device 10, and in the embodiment, is described as a signal including light reception amount information indicating the amount of light received and fire detection device identification information. The control unit 57 of the control device 50 then waits until it is determined that a light reception signal has been acquired (SB2, No), and if it is determined that a light reception signal has been acquired (SB2, Yes), it stops the emission of the light-emitting unit 20 of each fire detection device 10 and then proceeds to SB3.

[0052] In SB3, the detection unit 57a of the control device 50 detects the degree of contamination of each fire detection device 10 based on the light reception signal acquired in SB2. Any method for detecting the degree of contamination may be used, but for example, the amount of light received in the light reception amount information included in the light reception signal may be divided by a reference value (for example, a measurement value measured when each fire detection device 10 was shipped from the factory), and the result may be multiplied by 100 to detect the degree of contamination to be detected.

[0053] In SB4, the recording control unit 57b of the control device 50 records the contamination level detected in SB3 as contamination level history information in the memory unit 58 for each piece of fire detection device identification information. Specifically, information indicating the contamination level detected in SB3, the fire detection device identification information included in the light reception signal acquired in SB2, and information indicating the recording order, date, and time when the contamination level was recorded are correlated with each other as contamination level history information to be recorded (specifically, contamination level information, fire detection device identification information, recording order information, recording date information, and recording time information), and are recorded in the history DB 58a. Thereafter, the recording control unit 57b of the control device 50 ends the contamination level detection process and returns to the control process of FIG. 5.

[0054] (Control processing - Display processing) Next, a description will be given of the display processing of SA5 in Fig. 5. Fig. 7 is a flowchart of the display processing. The display processing is processing for displaying the contamination level history information recorded in the history DB 58a.

[0055] When the display process is started, as shown in FIG. 7, the display specification unit 57d of the control device 50 determines in SC1 whether specification of a display pattern for the contamination level history information has been accepted. Here, the "display pattern for the contamination level history information" refers to a format for displaying the contamination level history information. In the embodiment, the types of display patterns for the contamination level history information are described as including a first display pattern that displays the contamination level history information in the order in which the contamination levels were recorded, in ascending or descending order of the contamination levels, in descending or descending order of the most recent change in the contamination level (e.g., the change between the most recently detected contamination level and the contamination level detected immediately before), and in alphabetical order of the fire detection device identification information; and a second display pattern that displays only contamination level history information selected by a predetermined method (e.g., operation by the operation unit 51) from the contamination level history information recorded in the storage unit 58 and only contamination level history information corresponding to a contamination level equal to or greater than a threshold or less than a threshold.

[0056] Furthermore, the method of determining whether or not the display pattern has been designated is arbitrary, but for example, a display area (not shown) displayed on the screen of display unit 54 (hereinafter referred to as the "display pattern display area") may be generated, and the determination may be made based on whether or not any one of the information displayed in the generated display pattern display area and indicating the display patterns of the above-mentioned soiling degree history information has been selected via operation unit 51. If no selection has been made, it may be determined that the designation of the display pattern has not been accepted, and if a selection has been made, it may be determined that the designation of the display pattern has been accepted. Then, display designation unit 57d of control device 50 waits until the designation of the display pattern has been accepted (SC1, No), and if it is determined that the designation of the display pattern has been accepted (SC1, Yes), it designates the accepted display pattern and then proceeds to SC2.

[0057] In SC2, the display control unit 57c of the control device 50 causes the display unit 54 to display the contamination level history information recorded in the history DB 58a in the display pattern specified in SC1. The method for displaying this contamination level history information is arbitrary, but for example, a display area (not shown) displayed on the screen of the display unit 54 (hereinafter referred to as the "history display area") may be generated, and the contamination level history information (specifically, recording order information, recording date information, recording time information, fire detection device identification information, and contamination level information) may be displayed in the generated history display area in the display pattern specified in SC1 and in table format. As an example, if a display pattern = a pattern for displaying the contamination levels in the order in which they were recorded is specified in SC1, the contamination level history information is displayed in the history display area in the display pattern shown in FIG. 4.

[0058] By performing such SC1 and SC2 processing, it is possible to present the contamination level history information, compared to the conventional technology (technology that displays only information indicating the current light attenuation rate). Therefore, the manager can easily understand how the contamination of the fire detection device 10 has progressed, and it is possible to improve the manageability of the fire detection device 10. Furthermore, since the contamination level history information can be displayed in a display pattern specified by the display specification unit 57d, it is possible to display the contamination level history information according to the needs of the manager, and it is easy for the manager to understand how the contamination of the fire detection device 10 has progressed.

[0059] Returning to FIG. 7, in SC3, the display control unit 57c of the control device 50 determines whether a display timing for displaying the soiling timing (described later) (hereinafter referred to as the "second display timing") has arrived. The method for determining whether the second display timing has arrived is arbitrary. For example, the method may be based on whether a predetermined operation has been received via the operation unit 51 within a predetermined time, or based on whether a predetermined period (e.g., six months or one year) has elapsed (the same applies to the processing in SC6 described later). Here, if the predetermined operation has been received or the predetermined period has elapsed, the display control unit 57c determines that the second display timing has arrived. If the predetermined operation has not been received or the predetermined period has not elapsed, the display control unit 57c determines that the second display timing has not arrived. If the display control unit 57c of the control device 50 determines that the second display timing has arrived (Yes in SC3), the display control unit 57c proceeds to SC4. If the display control unit 57c determines that the second display timing has not arrived (No in SC3), the display control unit 57c proceeds to SC6.

[0060] At SC4, the estimation unit 57f of the control device 50 estimates the timing (hereinafter referred to as the "deterioration timing") at which the degree of defacement of the fire detection device 10 identified by a predetermined method will reach or exceed a threshold value based on the defacement degree history information recorded in the history DB 58a.

[0061] The method for estimating the contamination timing is arbitrary, but may be, for example, the following estimation. That is, first, the administrator performs a predetermined operation via the operation unit 51 to extract contamination level history information corresponding to the fire detection device 10 to be estimated from the contamination level history information recorded in the history DB 58a. Next, based on the recording date information, recording time information, and contamination level information included in the extracted contamination level history information, the rate of change in the contamination level for each predetermined time period is calculated, and the average value of the calculated change rates is calculated (more specifically, negative values ​​of the contamination level change rates are removed before calculating the average value). Next, the most recently recorded contamination level information included in the extracted contamination level history information is extracted. Then, the contamination level of the extracted contamination level information is subtracted from the threshold value, and the average value of the calculated change rates is divided by this value, and the resulting divided value is estimated as the contamination timing to be estimated.

[0062] In SC5, the display control unit 57c of the control device 50 correlates the contamination timing estimated in SC4 with the fire detection device identification information corresponding to the contamination timing and displays them on the display unit 54. Here, any method may be used to display the contamination timing and the fire detection device identification information. For example, a display area (not shown) displayed on the screen of the display unit 54 (hereinafter referred to as the "estimated display area") may be generated, and the information indicating the contamination timing and the fire detection device identification information may be displayed adjacent to each other in the generated estimated display area.

[0063] By processing SC4 and SC5 in this manner, the timing of contamination of a specific fire detection device 10 can be indicated, and for example, an administrator can take cleaning measures for the specific fire detection device 10 before the degree of contamination of the specific fire detection device 10 reaches a threshold value or above.

[0064] In SC6, the display control unit 57c of the control device 50 determines whether the display timing for displaying a count of zero (described later, referred to as the "third display timing") has arrived. If it is determined that the third display timing has arrived (SC6, Yes), the display control unit 57c of the control device 50 proceeds to SC7, and if it is determined that the third display timing has not arrived (SC6, No), the display process ends and the process returns to the control process of FIG. 5.

[0065] Returning to Figure 7, in SC7, the identification unit 57g of the control device 50 identifies the number of times the contamination level of each of the multiple fire detection devices 10 has become zero (hereinafter referred to as the "number of times zero") based on the contamination level history information recorded in the history DB 58a.

[0066] The method for identifying this number of zeros is arbitrary, but may be, for example, identified as follows: First, contamination degree information indicating a zero value is extracted for each fire detection device identification information from contamination degree information included in the contamination degree history information recorded in the history DB 58a. Then, the total number of the extracted contamination degree information indicating a zero value is calculated for each fire detection device identification information, and the calculated total number is identified as the number of zeros to be identified.

[0067] In SC8, the display control unit 57c of the control device 50 correlates the number of zeros identified in SC7 with the fire detection device identification information corresponding to the number of zeros and displays them on the display unit 54, then ends the display process and returns to the control process in Fig. 5. Here, any method may be used to display the number of zeros and the fire detection device identification information. For example, a display area (not shown) displayed on the screen of the display unit 54 (hereinafter referred to as a "specific display area") may be generated, and the information indicating the number of zeros and the fire detection device identification information may be displayed adjacent to each other in the generated specific display area, and may also be displayed in a tabular format.

[0068] By processing SC7 and SC8 in this manner, the number of zeros for each fire detection device 10 can be displayed, and for example, an administrator can take predetermined measures (such as shortening the replacement cycle of the fire detection device 10) for fire detection devices 10 with a relatively high number of zeros.

[0069] (Control processing - Recording processing) Next, a description will be given of the recording process of SA7 in Fig. 5. Fig. 8 is a flowchart of the recording process. The recording process is a process for recording the contamination level history information recorded in the history DB 58a in an external device.

[0070] When the recording process is initiated, as shown in FIG. 8, the recording designation unit 57e of the control device 50 in SD1 determines whether or not a designation for a recording pattern for the contamination level history information has been accepted. Here, the "recording pattern for the contamination level history information" refers to a format for recording the contamination level history information. In this embodiment, the types of recording patterns for the contamination level history information are described as including a first recording pattern that records the contamination level history information in the order in which the contamination levels were recorded, in descending or ascending order of the contamination levels, in descending or descending order of the most recent change in the contamination level, and in alphabetical order of the fire detection device identification information; and a second recording pattern that records only contamination level history information selected by a predetermined method (e.g., operation by the operation unit 51) from the contamination level history information recorded in the storage unit 58 and only contamination level history information corresponding to a contamination level equal to or greater than a threshold or less than a threshold.

[0071] Furthermore, the method of determining whether or not this recording pattern has been designated is arbitrary, but for example, a display area (not shown) displayed on the screen of display unit 54 (hereinafter referred to as the "recording pattern display area") may be generated, and the determination may be made based on whether or not any one of the information displayed in the generated recording pattern display area and indicating the recording patterns of the above-mentioned soiling degree history information has been selected via operation unit 51. If no selection has been made, it may be determined that the designation of a recording pattern has not been accepted, and if a selection has been made, it may be determined that the designation of a recording pattern has been accepted. Then, recording designation unit 57e of control device 50 waits until the designation of a recording pattern has been accepted (SD1, No), and if it is determined that the designation of a recording pattern has been accepted (SD1, Yes), it designates the accepted recording pattern and then proceeds to SD2.

[0072] In SD2, the recording control unit 57b of the control device 50 records the pollution level history information recorded in the history DB 58a in an external device in the recording pattern specified in SD1. The method for recording this pollution level history information is arbitrary, but for example, a file for recording the pollution level history information (hereinafter referred to as the "first record file") is created, the pollution level history information is recorded in the created first record file in the recording pattern specified in SD1, and then the first record file is output to the external device by the output unit 55. As an example, if a recording pattern = a pattern for recording in order of pollution level recording is specified in SD1, the pollution level history information is recorded in the external device in the recording pattern shown in Fig. 4.

[0073] By processing SD1 and SD2 in this manner, it is possible to provide the contamination level history information to an external device, and for example, detailed analysis of the contamination level history information can be easily performed using a processing device outside the management system 1. This makes it possible to improve the convenience for the administrator when using the management system 1. Furthermore, since the contamination level history information can be recorded in the recording pattern specified by the recording specification unit 57e, it is possible to provide the contamination level history information to an external device in a recording pattern that meets the needs of the administrator, and it is possible to avoid the need to change the recording pattern of the contamination level history information in, for example, a processing device outside the management system 1.

[0074] Returning to FIG. 8, in SD3, the recording control unit 57b of the control device 50 determines whether the recording timing for recording the soiling timing (described later) (hereinafter referred to as the "third recording timing") has arrived. The method for determining whether the third recording timing has arrived is arbitrary, and for example, the determination may be based on whether a predetermined operation has been accepted via the operation unit 51 within a predetermined time period (the same applies to the processing in SD6 described later). Here, if the predetermined operation has been accepted, it is determined that the third recording timing has arrived; if the predetermined operation has not been accepted, it is determined that the third recording timing has not arrived. If the recording control unit 57b of the control device 50 determines that the third recording timing has arrived (SD3, Yes), it proceeds to SD4. If the recording control unit 57b determines that the third recording timing has not arrived (SD3, No), it proceeds to SD6.

[0075] In SD4, the estimation unit 57f of the control device 50 estimates the timing of contamination based on the contamination level history information recorded in the history DB 58a. The method for estimating the timing of contamination is arbitrary, but for example, if the timing of contamination is estimated in SC4 of the display process performed immediately before the recording process, that timing of contamination may be estimated as the timing of contamination to be estimated. On the other hand, if the processing of SC4 was not performed in the display process performed immediately before the recording process, or if no display process was performed immediately before the recording process, the timing of contamination may be estimated using a method similar to SC4.

[0076] In SD5, the recording control unit 57b of the control device 50 correlates the contamination timing estimated in SD4 with the fire detection device identification information corresponding to the contamination timing and records them in an external device. Here, any method can be used to record the contamination timing and the fire detection device identification information, but for example, a file (hereinafter referred to as a "second record file") for recording the contamination timing and the fire detection device identification information is created, and information indicating the contamination timing and the fire detection device identification information is recorded in the created second record file, and then the second record file is output by the output unit 55 to the external device for recording.

[0077] By performing the processes SD4 and SD5, the contamination timing of a specific fire detection device 10 can be provided to an external device, and the time and effort required to calculate the contamination timing of a specific fire detection device 10 in a processing device outside the management system 1 can be eliminated.

[0078] In SD6, the recording control unit 57b of the control device 50 determines whether the recording timing for recording zero counts (hereinafter referred to as the "fourth recording timing") has arrived. If the recording control unit 57b of the control device 50 determines that the fourth recording timing has arrived (SD6, Yes), it proceeds to SD7. If the recording control unit 57b determines that the fourth recording timing has not arrived (SD6, No), it ends the recording process and returns to the control process of FIG. 5.

[0079] 8, in SD7, the identification unit 57g of the control device 50 identifies the number of zeros for each of the multiple fire detection devices 10 based on the contamination level history information recorded in the history DB 58a. The method for identifying the number of zeros is arbitrary, but for example, if a number of zeros is identified in SC7 of the display process performed immediately before the recording process, that number of zeros may be identified as the number of zeros to be identified. On the other hand, if the process of SC7 was not performed in the display process performed immediately before the recording process, or if no display process was performed immediately before the recording process, the number of zeros may be identified using a method similar to SC7.

[0080] In SD8, the recording control unit 57b of the control device 50 correlates the number of zeros specified in SD7 with the fire detection device identification information corresponding to the number of zeros and records them in the external device, then ends the recording process and returns to the control process in Fig. 5. Here, any method may be used to record the number of zeros and the fire detection device identification information, but for example, a file for recording the number of zeros and the fire detection device identification information (hereinafter referred to as the "third record file") is created, information indicating the number of zeros and the fire detection device identification information are recorded in the created third record file, and then this third record file is output by the output unit 55 to the external device for recording.

[0081] By performing the processes in SD7 and SD8, the number of zeros for each fire detection device 10 can be provided to an external device, and the process of calculating the number of zeros for each fire detection device 10 in a processing device outside the management system 1 can be omitted, for example.

[0082] (Effects of the embodiment) As described above, according to the embodiment, the control device 50 includes a recording control unit 57b that, when the first recording timing arrives, records the degree of contamination detected by the detection unit 57a as contamination degree history information in the memory unit 58 of the control device 50 for each fire detection device identification information, and a display control unit 57c that, when the first display timing arrives, displays the contamination degree history information recorded in the memory unit 58 on the display unit 54 of the control device 50. This makes it possible to present the contamination degree history information better than the prior art (a technology that displays only information indicating the current light attenuation rate). Therefore, the user can easily understand how the contamination of the fire detection device 10 has progressed, and the manageability of the fire detection device 10 can be improved.

[0083] In addition, the display control unit 57c displays the contamination level history information recorded in the memory unit 58 on the display unit 54 in the display pattern specified by the display specification unit 57d, so that the contamination level history information can be displayed according to the user's needs, making it easier for the user to understand how the contamination of the fire detection device 10 has progressed.

[0084] In addition, the display patterns specified by the display specification unit 57d include a first display pattern in which the contamination level history information recorded in the memory unit 58 is displayed in the order in which the contamination level was recorded, in order of highest or lowest contamination level, in order of largest or smallest most recent change in the contamination level, or in alphabetical order of the fire detection device identification information, or a second display pattern in which only contamination level history information selected by a predetermined method from the contamination level history information recorded in the memory unit 58 is displayed, or only contamination level history information corresponding to a contamination level above or below a threshold value.Therefore, the contamination level history information can be displayed in a more tailored manner to the user's needs, making it easier for the user to understand how the contamination of the fire detection device 10 has progressed.

[0085] Furthermore, when the second display timing arrives, the display control unit 57c correlates the soiling timing estimated by the estimation unit 57f with the fire detection device identification information corresponding to the soiling timing and displays them on the display unit 54, thereby making it possible to present the soiling timing of a specific fire detection device 10, and for example, enabling the user to take cleaning measures or the like for the specific fire detection device 10 before the degree of soiling of the specific fire detection device 10 reaches or exceeds a threshold value.

[0086] Furthermore, when the third display timing arrives, the display control unit 57c correlates the number of zeros identified by the identification unit 57g with the fire detection device identification information corresponding to the number of zeros and displays them on the display unit 54, so that the number of zeros for each fire detection device 10 can be presented, and for example, the user can take predetermined measures (such as shortening the replacement cycle of the fire detection device 10) for a fire detection device 10 with a relatively high number of zeros.

[0087] Furthermore, since the control device 50 is a disaster prevention receiver that performs disaster prevention processing based on outputs from multiple fire detection devices 10, there is no need to install both the control device 50 and the disaster prevention receiver, which reduces the installation costs of the management system 1.

[0088] [III] Modifications to the embodiment Although the embodiments of the present invention have been described above, the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of the inventions set forth in the claims. Such modifications will be described below.

[0089] (About the problem to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and may vary depending on the implementation environment of the invention and the details of the configuration, and may solve only some of the problems described above or achieve only some of the effects described above.

[0090] (Regarding decentralization and integration) Furthermore, the electrical components described above are merely functional concepts and do not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution or integration of each component is not limited to that shown in the figure, and all or part of the components can be functionally or physically distributed or integrated in any unit depending on various loads, usage conditions, etc. Furthermore, the term "device" in this application is not limited to a single device but also includes a configuration consisting of multiple devices. For example, the control device 50 may be distributed across multiple devices configured to be able to communicate with each other, with a control unit 57 provided in some of the multiple devices and a memory unit 58 provided in other of the multiple devices.

[0091] (Display pattern of contamination history information) In the above embodiment, the types of display patterns of the soiling level history information are described as including a first display pattern and a second display pattern, but this is not limited to this and, for example, may include only either the first display pattern or the second display pattern.

[0092] In the above embodiment, the first display pattern has been described as including a pattern in which the contamination levels are arranged in order of recording, in descending or descending order of the contamination levels, in descending or descending order of the most recent change in the contamination levels, and in alphabetical order of the fire detection device identification information. However, the first display pattern is not limited to this. For example, the first display pattern may include only any of a pattern in which the contamination levels are arranged in order of recording, in descending or descending order of the contamination levels, in descending or descending order of the most recent change in the contamination levels, or in alphabetical order of the fire detection device identification information.

[0093] Furthermore, in the above embodiment, it has been described that the second display pattern includes a pattern that displays only the pollution level history information selected by a predetermined method from the pollution level history information recorded in the storage unit 58, and only the pollution level history information corresponding to a pollution level equal to or greater than a threshold value or less than a threshold value, but this is not limited to this. For example, the second display pattern may include only either a pattern that displays only the pollution level history information selected by the above predetermined method, or only the pollution level history information corresponding to a pollution level equal to or greater than a threshold value or less than a threshold value.

[0094] (Regarding the recording pattern of the contamination level history information) In the above embodiment, the types of recording patterns of the soiling level history information are described as including a first recording pattern and a second recording pattern, but this is not limited to this and, for example, the types may include only either the first recording pattern or the second recording pattern.

[0095] In the above embodiment, the first recording pattern has been described as including a pattern of arranging and recording the contamination levels in the order of their recording, in descending or descending order of the contamination levels, in descending or descending order of the most recent change in the contamination levels, and in the character order of the fire detection device identification information, but is not limited thereto. For example, the first recording pattern may include only any of a pattern of arranging and recording the contamination levels in descending or descending order of the most recent change in the contamination levels, in descending or descending order of the most recent change in the contamination levels, or in the character order of the fire detection device identification information.

[0096] Furthermore, in the above embodiment, it has been described that the second recording pattern includes a pattern in which, from the contamination level history information recorded in the storage unit 58, only contamination level history information selected by a predetermined method and only contamination level history information corresponding to a contamination level equal to or greater than a threshold value or less than a threshold value are recorded, but this is not limited thereto. For example, the second recording pattern may include only either a pattern in which only contamination level history information selected by the above predetermined method or only contamination level history information corresponding to a contamination level equal to or greater than a threshold value or less than a threshold value are recorded.

[0097] (Regarding the control device) In the above embodiment, the control device 50 is described as including the detection unit 57a, but this is not limiting. For example, the detection unit 57a may be omitted from the control device 50, and the fire detection device 10 may include the detection unit 57a. In this case, it may be determined in SB2 whether or not information indicating the contamination level has been acquired from the fire detection device 10, the processing in SB3 may be omitted, and the information indicating the contamination level acquired in SB2 may be recorded in the history DB 58a in SB4. Good too.

[0098] In the above embodiment, the control device 50 is described as including the display designation unit 57d, but this is not limiting, and the display designation unit 57d may be omitted. In this case, the process of SC1 in the display process may be omitted.

[0099] In the above embodiment, the control device 50 is described as including the recording designation unit 57e, but this is not limiting, and the display designation unit 57d may be omitted. In this case, the process of SD1 in the recording process may be omitted.

[0100] In the above embodiment, the control device 50 is described as including the estimation unit 57f, but this is not limiting, and the estimation unit 57f may be omitted. In this case, the processes SC3 to SC5 of the display process and the processes SD3 to SD5 of the recording process may be omitted.

[0101] In the above embodiment, the control device 50 is described as including the specifying unit 57g, but this is not limiting, and the specifying unit 57g may be omitted. In this case, the processes SC6 to SC8 of the display process and the processes SD6 to SD8 of the recording process may be omitted.

[0102] (Regarding control processing) In the above embodiment, it has been explained that the processes SA6 and SA7 are performed, but this is not limiting, and for example, SA6 and SA7 may be omitted.

[0103] In the above embodiment, it has been described that in SC5, the information indicating the soiling timing estimated in SC4 is displayed (notified) by the display unit 54, but this is not limiting. For example, the information indicating the soiling timing may be notified by notification means other than the display unit 54 (one example is a known audio output means), or may be notified by both the display unit 54 and the notification means (the same applies to the processing in SC8).

[0104] (Display processing) In the above embodiment, it has been described that the display control unit 57c of the control device 50 displays the contamination level history information, information indicating the contamination timing, and information indicating the zero count on the display unit 54. However, this is not limiting, and other information may be displayed in addition to these pieces of information. For example, the control device 50 may include a determination means that determines whether or not there is a possibility that an abnormality (specifically, a malfunction or failure of the fire detection device 10) has occurred in any of the plurality of fire detection devices 10, based on the contamination level history information recorded in the history DB 58a. If the determination means determines that there is a possibility that the abnormality has occurred, the display control unit 57c of the control device 50 may display information to notify this on the display unit 54 (or, in addition to this information, information to check the light-emitting unit 20, the light-receiving unit 30, or the communication unit of the corresponding fire detection device 10 may also be displayed). Here, the method for determining whether or not the abnormality may have occurred is arbitrary. For example, the determination may be based on the contamination level history information of each fire detection device 10, and may be based on whether the period of the fluctuation cycle in which the contamination level reaches a zero value and then exceeds the threshold value is shorter than a predetermined value, or whether the amount of fluctuation in the contamination level within a predetermined period is smaller than a predetermined value. If the period of the fluctuation cycle is shorter than the predetermined value or the amount of fluctuation is smaller than the predetermined value, it is determined that the abnormality may have occurred. If the period of the fluctuation cycle is not shorter than the predetermined value or the amount of fluctuation is not smaller than the predetermined value, it is determined that the abnormality may not have occurred. This processing may indicate that an abnormality may have occurred in one of the multiple fire detection devices, allowing the user to take predetermined measures (e.g., checking the fire detection device) for the fire detection device that may have an abnormality. In this case, for example, when a specified operation is received via the operation unit 51, the display control unit 57c of the control device 50 may determine the number of repetitions of the above-mentioned fluctuation cycle, and then the contamination level history information recorded in the history DB 58a may be displayed on the display unit 54 in order of the determined number of repetitions, either high or low.

[0105] (Addendum) The management system of Appendix 1 is a management system comprising a plurality of fire detection devices that detect fires in a monitored area, and a control device that is communicatively connected to each of the plurality of fire detection devices, wherein each of the plurality of fire detection devices or the control device is provided with a detection means that detects the degree of contamination of the fire detection device, and the control device is provided with a recording control means that, when a recording timing for recording the degree of contamination arrives, records the degree of contamination detected by the detection means as contamination degree history information in a memory means of the control device for each identification information of the fire detection device, and a display control means that, when a first display timing for displaying the contamination degree history information arrives, displays the contamination degree history information recorded in the memory means on a display means of the control device.

[0106] In addition, the management system of Appendix 2 is the management system described in Appendix 1, and is provided with a display designation means for designating a display pattern for the contamination level history information, and the display control means causes the display means to display the contamination level history information recorded in the storage means in the display pattern designated by the display designation means.

[0107] In addition, the management system of Appendix 3 is the management system described in Appendix 2, and the display pattern specified by the display specification means includes a first display pattern that displays the contamination level history information recorded in the storage means in the order in which the contamination levels were recorded, in descending or descending order of the contamination levels, in descending or descending order of the most recent change in the contamination level, or in alphabetical order of the identification information of the fire detection device, or a second display pattern that displays only the contamination level history information selected by a predetermined method from the contamination level history information recorded in the storage means, or only the contamination level history information corresponding to a contamination level above or below a threshold value.

[0108] In addition, the management system of Appendix 4 is a management system described in any one of Appendixes 1 to 3, and is provided with an estimation means for estimating the contamination timing at which the contamination level of the fire detection device identified by a predetermined method will become equal to or greater than a threshold level based on the contamination level history information recorded in the memory means, and when a second display timing for displaying the contamination timing arrives, the display control means causes the contamination timing estimated by the estimation means and the identification information of the fire detection device corresponding to the contamination timing to be displayed on the display means in association with each other.

[0109] In addition, the management system of Appendix 5 is a management system described in any one of Appendixes 1 to 4, and is provided with an identification means for identifying the number of zeros, which is the number of times the contamination level of each of the plurality of fire detection devices has become a zero value, based on the contamination level history information recorded in the memory means, and when a third display timing for displaying the number of zeros arrives, the display control means causes the display means to correlate the number of zeros identified by the identification means with the identification information of the fire detection device corresponding to the number of zeros and display them.

[0110] In addition, the management system of Appendix 6 is a management system described in any one of Appendixes 1 to 5, and is provided with a judgment means for judging whether or not there is a possibility that an abnormality has occurred in any of the plurality of fire detection devices based on the contamination level history information recorded in the memory means, and when the judgment means judges that there is a possibility that there is an abnormality, the display control means causes the display means to display information to notify that fact.

[0111] Further, the management system of Supplementary Note 7 is the management system described in any one of Supplementary Note 1 to 6, wherein the control device is a disaster prevention receiver that performs disaster prevention processing based on outputs from the plurality of fire detection devices.

[0112] (Effect of supplementary notes) According to the management system described in Supplementary Note 1, the control device includes a recording control means for recording the degree of contamination detected by the detection means as contamination degree history information in the storage means of the control device for each identification information of the fire detection device when the recording timing arrives, and a display control means for displaying the contamination degree history information recorded in the storage means on the display means of the control device when the first display timing arrives, so that the contamination degree history information can be presented more effectively than in the prior art (a technology that displays only information indicating the current light attenuation rate). This allows the user to easily grasp the progress of contamination of the fire detection device, and improves the manageability of the fire detection device.

[0113] According to the management system described in Appendix 2, the display control means causes the display means to display the contamination level history information recorded in the storage means in the display pattern specified by the display specification means, so that the contamination level history information can be displayed according to the user's needs, making it easier for the user to understand how the contamination of the fire detection device has progressed.

[0114] According to the management system described in Appendix 3, the display pattern specified by the display specification means includes a first display pattern in which the contamination level history information recorded in the storage means is displayed in the order in which the contamination level was recorded, in order of highest or lowest contamination level, in order of largest or smallest most recent change in the contamination level, or in alphabetical order of the identification information of the fire detection device, or a second display pattern in which only contamination level history information selected by a predetermined method from the contamination level history information recorded in the storage means, or only contamination level history information corresponding to a contamination level above or below a threshold value, thereby making it possible to display contamination level history information that meets the needs of the user more easily, and making it easier for the user to understand how the contamination of the fire detection device has progressed.

[0115] According to the management system described in Appendix 4, when the second display timing arrives, the display control means causes the display means to correlate the contamination timing estimated by the estimation means with the identification information of the fire detection device corresponding to the contamination timing, thereby making it possible to present the contamination timing of a specific fire detection device, and for example, enabling the user to take cleaning measures, etc., for the fire detection device before the degree of contamination of the specific fire detection device reaches or exceeds a threshold value.

[0116] According to the management system described in Appendix 5, when the third display timing arrives, the display control means causes the display means to display the number of zeros identified by the identification means in correlation with the identification information of the fire detection device corresponding to the number of zeros, thereby making it possible to present the number of zeros for each fire detection device and, for example, enabling the user to take predetermined measures (for example, shortening the replacement cycle of the fire detection device) for fire detection devices with a relatively high number of zeros.

[0117] According to the management system described in Appendix 6, when the determination means determines that there is a possibility that an abnormality has occurred in one of the multiple fire detection devices, the display control means displays information to notify that fact on the display means, thereby making it possible to indicate that there is a possibility that an abnormality has occurred in one of the multiple fire detection devices, and for example, enabling the user to take predetermined measures (e.g., checking the fire detection device) for a fire detection device that may have an abnormality.

[0118] According to the management system described in Appendix 7, the control device is a disaster prevention receiver that performs disaster prevention processing based on the outputs from multiple fire detection devices, so there is no need to install both a control device and a disaster prevention receiver, thereby reducing the installation costs of the management system. [Explanation of symbols]

[0119] 1 Management System 2 structures 3 Wiring 10 Fire detection equipment 11 Light receiving window 20 Light-emitting part 30 Light receiving section 40 Control Unit 50 Control device 51 Operation section 52 Communications Department 53 Signal transmission unit 54 Display section 55 Output section 56 Power supply section 57 Control Unit 57a Detector 57b Recording control section 57c Display control unit 57d Display specification section 57e Recording specification section 57f Estimation part 57g Specific part 58 Memory section 58a History DB

Claims

[Claim 1] A management system including a plurality of fire detection devices each having a light receiving window and configured to detect a fire in a monitoring area based on light received from the outside through the light receiving window, and a control device connected to each of the plurality of fire detection devices so as to be able to communicate with each of the plurality of fire detection devices, Each of the plurality of fire detection devices or the control device a detection means for detecting a degree of contamination of the light receiving window of the fire detection device; The control device a display control means for displaying the degree of contamination detected by the detection means on a display means; and an estimation means for estimating a contamination timing at which the contamination level of each of the fire detection devices will reach a predetermined contamination state based on contamination level history information, which is history information of the contamination level detected by the detection means, The contamination level history information includes contamination level information indicating the contamination level detected by the detection means, recording date information indicating the date on which the contamination level information was recorded, and recording time information indicating the time at which the contamination level information was recorded, the estimation means estimates the contamination timing based on a rate of change in the contamination degree for each predetermined time calculated based on the contamination degree information, the recording date information, and the recording time information; the display control means causes the display means to display the contamination timing estimated by the estimation means and the identification information of the fire detection device corresponding to the contamination timing in association with each other; a determination unit that determines whether or not a predetermined abnormality is likely to occur in any of the plurality of fire detection devices based on the contamination level history information, The determination means determines whether or not there is a possibility that the abnormality has occurred based on whether or not a period of a fluctuation cycle in which the contamination degree becomes equal to or greater than a threshold value after becoming zero is shorter than a predetermined value, or whether or not an amount of fluctuation in the contamination degree within a predetermined period is smaller than a predetermined value, by referring to the contamination degree information, the recording date information, and the recording time information; the display control means, when the determination means determines that there is a possibility that the abnormality has occurred, causes the display means to display information to notify that fact. Management system.

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