Disaster prevention system

Abstract

To provide a disaster prevention system that enables a call between an emergency telephone master unit side and an emergency telephone slave unit side to be established easily.SOLUTION: A disaster prevention system includes an emergency telephone master unit 4, an emergency telephone slave unit 5 located in a monitored area, which emergency telephone slave unit 5 can talk to the emergency telephone master unit 4, and at least a disaster prevention display unit 3 that, in the event of a fire, displays information indicating a location of the fire on a map showing the monitored area. When a predetermined operation is performed to select a slave symbol image corresponding to the emergency telephone slave unit 5 that is a target of establishing a call with the emergency telephone master unit 4, the disaster prevention display unit 3 performs a process to establish a call between the emergency telephone slave unit 5 corresponding to the slave unit symbol image selected by the predetermined operation and the emergency telephone master unit 4.SELECTED DRAWING: Figure 1

Description

Technical Field

[0007] , ,

[0001] The present invention relates to a disaster prevention system.

Background Art

[0002] Conventionally, a disaster prevention system including an emergency telephone main unit and a plurality of emergency telephone sub-units for making calls in an emergency such as a fire has been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional disaster prevention system, when making a call from the emergency telephone main unit side to the emergency telephone sub-unit side, for example, the user uses a paper map or the like to confirm the installation location of the emergency telephone sub-unit to be called, and then inputs information indicating the installation location (for example, information indicating the building, floor, area, and number) to the emergency telephone main unit side to establish the call.

[0005] And in this conventional disaster prevention system, there is room for improvement in terms of more easily establishing a call between the emergency telephone main unit side and the emergency telephone sub-unit side.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a disaster prevention system capable of easily establishing a call between an emergency telephone main unit side and an emergency telephone sub-unit side.

Means for Solving the Problems

[0007] In order to solve the above-described problems and achieve the object, the disaster prevention system according to claim 1 includes an emergency telephone main unit and an emergency telephone sub-unit arranged in a monitoring area,via telephone line The emergency telephone base unit and the emergency telephone handset capable of making calls, A disaster prevention receiver connected via a transmission line to a sensor located in the aforementioned monitoring area, and a separate device provided from the disaster prevention receiver that transmits from the disaster prevention receiver. fire Disaster raw signal to based on, The system includes a display device that displays information indicating the location of the fire on a map showing the monitoring area, wherein the display device displays symbol information corresponding to the emergency telephone handset at a location on the map corresponding to the location where the emergency telephone handset is located in the monitoring area, The handset symbol information corresponding to the emergency telephone handset making a call to the aforementioned emergency telephone base unit, Symbol information corresponding to the emergency telephone cordless unit that has established a call with the aforementioned emergency telephone base unit and then ended the call. and , symbol information corresponding to other emergency telephone handsets , each Display in a distinguishable format and is configured to be integrated with the aforementioned emergency telephone base unit. It is characterized by the following:

[0008] Furthermore, the disaster prevention system described in claim 2 is characterized in that, in the disaster prevention system described in claim 1, after a fire occurs, the symbol information corresponding to an emergency telephone handset that has established a call with the emergency telephone master unit and then ended the call is displayed in a form that is distinguishable from the symbol information corresponding to other emergency telephone handsets until the fire is restored.

[0011] Furthermore, claims 3The disaster prevention system described above comprises: an emergency telephone base unit; an emergency telephone handset located in a monitoring area, the handset capable of communicating with the emergency telephone base unit; and an operation display unit that displays on a map information indicating the location of a fire in the event of a fire, and symbol information corresponding to the emergency telephone handset at the location where the emergency telephone handset is located in the monitoring area, and displays the symbol information corresponding to the calling emergency telephone handset in a display format that can be distinguished from the symbol information corresponding to other emergency telephone handsets, wherein when a predetermined operation for establishing a call between the emergency telephone base unit and the emergency telephone handset is performed on the operation display unit, the system establishes a call between the emergency telephone handset corresponding to the symbol information selected by the predetermined operation and the emergency telephone base unit. [Effects of the Invention]

[0012] Claim 1, 3 The disaster prevention system described can solve the problems of this invention. [Brief explanation of the drawing]

[0013] [Figure 1] This figure shows a building to which the disaster prevention system according to this embodiment is applied. [Figure 2] This is a floor plan of the third floor of the building shown in Figure 1. [Figure 3] This is a block diagram showing the functions of a disaster prevention display device. [Figure 4] This is a diagram illustrating equipment information. [Figure 5] This is a diagram illustrating the information of a sub-unit. [Figure 6] This is a block diagram showing the functions of an emergency telephone base station. [Figure 7] This is a block diagram showing the functions of an emergency telephone handset. [Figure 8] This is a flowchart for the fire location display process. [Figure 9] This is a diagram illustrating a fire location display screen. [Figure 10] It is a flowchart of call processing. [Figure 11] It is a flowchart of call processing. [Figure 12] It is a diagram illustrating an image for sub - unit selection.

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments of the disaster prevention system according to the present invention will be described in detail based on the drawings. Note that the present invention is not limited by this embodiment.

[0015] 〔Basic Concepts of the Embodiment〕 First, the basic concepts of this embodiment will be described. This embodiment is generally related to a disaster prevention system.

[0016] A "disaster prevention system" is a system used for disaster prevention, and for example, it includes an emergency phone main unit, an emergency phone sub - unit, and a display device.

[0017] An "emergency phone main unit" is a device for making a call with the emergency phone sub - unit side, and for example, it is a device used in an emergency (such as when a disaster like a fire or an earthquake occurs).

[0018] An "emergency phone sub - unit" is a device for making a call with the emergency phone main unit side. Specifically, it is an emergency phone sub - unit arranged in a monitoring area and can communicate with the emergency phone main unit, and for example, it is a device used in an emergency.

[0019] A "display device" is at least a device that displays information indicating the location of a fire that has occurred on a map showing the monitoring area. Specifically, it is a device that displays symbol information corresponding to the emergency phone sub - unit at a position on the map corresponding to the position where the emergency phone sub - unit is arranged in the monitoring area, and for example, it is a so - called disaster prevention display device.

[0020] "Monitoring area" refers to the area being monitored by the display device, and is a concept that includes, for example, areas within a structure (building, tunnel, etc.) and areas outside of a structure. "Symbol information corresponding to an emergency telephone handset" is a concept that includes, for example, image information indicating an emergency telephone handset.

[0021] The term "display device" is a concept that includes, for example, a device that performs a predetermined operation to establish a call between an emergency telephone base unit and an emergency telephone handset, and when a predetermined operation is performed to select symbol information corresponding to the emergency telephone handset to which a call is to be established with the emergency telephone base unit, it performs a process to establish a call between the emergency telephone handset corresponding to the symbol information selected by the predetermined operation and the emergency telephone base unit.

[0022] The term "display device" is a concept that includes, for example, means for identifying the status of a call between an emergency telephone base unit and an emergency telephone handset, and for displaying symbol information in a display manner corresponding to the identified status.

[0023] "State related to a call" refers to the circumstances of a call between an emergency telephone base unit and an emergency telephone handset, and specifically encompasses any arbitrary state. In this embodiment, for example, when the display device receives a predetermined operation from the user (a predetermined operation to instruct the preparation for making a call), it issues a call instruction to the emergency telephone base unit. Subsequently, when the user goes off-hook on the emergency telephone base unit, a call is established between the emergency telephone base unit and the emergency telephone handset. The call is then disconnected when either the emergency telephone base unit or the emergency telephone handset goes on-hook. In this example, "state related to a call" may be interpreted as a concept that includes, for example, a normal state, a call standby state, and a call state.

[0024] "Normal state" refers to a state in which, for example, no preparation for making a call or making a call has been made, and more specifically, a state in which the user has not yet performed the prescribed operation to instruct the display device to prepare for making a call. "Call standby state" refers to a state in which, for example, preparation for making a call has been made, and more specifically, a state in which the user has performed the prescribed operation to instruct the display device to prepare for making a call, but the emergency telephone base unit has not yet been taken off-hook. "Call state" refers to a state in which, for example, a call has been made, and more specifically, a state in which the user has performed the prescribed operation to instruct the display device to prepare for making a call, and the emergency telephone base unit has been taken off-hook.

[0025] "Display mode" refers to the appearance of a display and is a concept that includes, for example, display color, display size, and display cycle (such as continuous display or flashing display).

[0026] The following embodiment describes the case where the "monitoring area" is an area inside a building.

[0027] [Specific details of the embodiment] Next, the specific details of the embodiment will be described.

[0028] (composition) First, the configuration of the disaster prevention system according to this embodiment will be described. Figure 1 is a diagram showing a building to which the disaster prevention system according to this embodiment is applied, and Figure 2 is a floor plan of the third floor of the building shown in Figure 1.

[0029] The disaster prevention system 100 in Figure 1 is a system for fire prevention in the building shown in Figure 1, and is applied to that building. The building is, for example, a three-story commercial facility, and the third floor of the building has three staircases (Staircase 1 to Staircase 3), five rooms (Room 1 to Room 5), and three corridors (Corridor 1 to Corridor 3), as shown in Figure 2. Staircases, rooms, and corridors are also provided on the first and second floors of the building as appropriate, but this embodiment will focus on the third floor. The installation locations of the disaster prevention receiver 2, disaster prevention display device 3, and emergency telephone master unit 4 are arbitrary, but for example, they will be described as being installed adjacent to each other in the rooms corresponding to the disaster prevention room on the first floor of the building shown in Figure 1. In Figure 2, for the sake of explanation, the detectors 1 are shown as circles, and although there are multiple detectors, only detectors 131 and 132 among these detectors 1 are labeled with reference numerals.

[0030] The disaster prevention system 100 in Figure 1 includes, for example, a detector 1, a disaster prevention receiver 2, a disaster prevention display device 3, an emergency telephone master unit 4, and an emergency telephone sub-unit 5. While multiple detectors 1 and emergency telephone sub-units 5 are provided on each floor, for the sake of clarity, only one is shown on each floor in Figure 1. Furthermore, for the sake of clarity, the telephone-side transmission line L1, telephone line L2, and detector-side transmission line L3 are each shown as a single solid line. Although the example in Figure 1 illustrates the case where the telephone-side transmission line L1 and the detector-side transmission line L3 are separate, they may also be configured as a common line.

[0031] (Configuration-sensor) The detector 1 in Figure 1 is a device that detects and notifies of a fire in the compartment in which it is installed. It is installed in each compartment on each floor and is connected to the fire prevention receiver 2 via the detector-side transmission line L3. For example, as shown in Figure 2, detectors 131 to 132 are installed on the third floor of the building. The specific type and configuration of this detector 1 are arbitrary, but for example, it includes a communication unit, a recording unit, and a control unit, which are not shown. The recording unit of the detector 1 stores an equipment ID for unique identification of itself, and in particular, the recording units of detectors 131 to 132 store "ID131" to "ID131" as equipment IDs. When the control unit of the detector 1 detects a fire using a known method (for example, a method that detects based on smoke density), it generates a fire occurrence signal including the equipment ID stored in its recording unit and transmits the generated fire occurrence signal to the fire prevention receiver 2 via the detector-side transmission line L3 to notify of the fire.

[0032] (Configuration - Disaster Prevention Receiver) The fire prevention receiver 2 shown in Figure 1 is a device that performs various fire prevention processes when it receives a fire alarm signal from the detector 1. The specific configuration of this fire prevention receiver 2 is arbitrary, and a known configuration can be applied, so a detailed explanation is omitted.

[0033] (Configuration-disaster prevention display device) Figure 3 is a block diagram showing the functions of a disaster prevention display device. The disaster prevention display device 3 in Figure 1 is the aforementioned display device, and is, for example, connected to various devices of the disaster prevention system 100 (including the disaster prevention receiver 2 and the emergency telephone master unit 4) in a communicative manner. The disaster prevention display device 3 comprises, for example, a communication unit 31, a display unit 32, an operation unit 33, a recording unit 34, and a control unit 35, as shown in Figure 3.

[0034] (Configuration - Disaster Prevention Display Device - Communication Department) The communication unit 31 in Figure 3 is a communication means for communicating with external devices (i.e., the various devices included in the disaster prevention system 100, including the disaster prevention receiver 2 and the emergency telephone master unit 4). The specific type and configuration of this communication unit 31 are arbitrary, but for example, it can be configured using a known communication circuit (unless otherwise specified, the same applies to the communication units of other devices).

[0035] (Configuration - Disaster prevention display device - Display part) The display unit 32 in Figure 3 is a display means for displaying various information. The specific type and configuration of this display unit 32 are arbitrary, but for example, it can be configured using a display such as a well-known liquid crystal display or organic EL display.

[0036] (Configuration - Disaster prevention display device - Operation section) The operation unit 33 in Figure 3 is an operating means for inputting various types of information. The specific type and configuration of this operation unit 33 are arbitrary, but for example, it can be configured using known operation buttons. Alternatively, the operation unit 33 may be configured using a touchpad, keyboard, or mouse, either in place of or in conjunction with operation buttons.

[0037] (Configuration - Disaster Prevention Display Device - Recording Unit) The recording unit 34 in Figure 3 is a recording means for recording programs and various data necessary for the operation of the disaster prevention display device 3, and is configured using, for example, flash memory or a hard disk. However, any other recording medium, including magnetic recording media such as magnetic disks, or optical recording media such as DVDs or Blu-ray discs, can be used instead of or in combination with flash memory or a hard disk (the same applies to the recording units of other devices).

[0038] The recording unit 34 stores, for example, map information, equipment information, and sub-unit information.

[0039] (Configuration - Disaster Prevention Display Device - Recording Unit - Map Information) "Map information" refers to information that identifies a floor plan showing at least one section inside a building to which the disaster prevention system 100 is applied, for example, information that identifies a floor plan for each floor, for example, information that identifies a map like the floor plan shown in Figure 2. In this embodiment, map information for each floor of the building is stored, specifically, map information that identifies a map like the floor plan of the first floor (hereinafter also referred to as "1st floor map information"), map information that identifies a map like the floor plan of the second floor (hereinafter also referred to as "2nd floor map information"), and map information that identifies a map like the floor plan of the third floor (i.e., the floor plan in Figure 2) (hereinafter also referred to as "3rd floor map information") will be described. The specific method for storing such map information is arbitrary, but for example, when map information is input to the disaster prevention display device 3 using any method (for example, a method of inputting information using a recording medium such as a memory stick, or a method of inputting information by sending information from the administrator's terminal, etc.), the control unit 35 will store the map information (the same applies to the equipment information and slave device information described later).

[0040] (Configuration - Disaster Prevention Display Device - Recording Unit - Equipment Information) "Equipment information" refers to information that identifies each piece of equipment (other than the emergency telephone handset 5) included in the disaster prevention system 100. Figure 4 is an example of equipment information. This equipment information is interconnected, for example, as shown in Figure 4, with information corresponding to the item "Equipment ID," information corresponding to the item "Equipment Type Information," and information corresponding to the item "Installation Location Information."

[0041] The information corresponding to the item "Equipment ID" is equipment identification information (the identification information is also referred to as "ID") used to uniquely identify each piece of equipment. This equipment ID is arbitrary, but for example, let's assume that an equipment ID is set for sensor 1 as described above, and this equipment ID is recorded. In Figure 4, for example, "ID131" to "ID132" which uniquely identify sensors 131 to 132 in Figure 2 are stored. The information corresponding to the item "Equipment Type Information" is equipment type information that identifies the type of equipment (in Figure 4, this is "Sensor" which identifies the type of sensor 1). The information corresponding to the item "Installation Location Information" is installation location information that identifies the location where each piece of equipment is installed (in Figure 4, let's assume that information that identifies the floor on which each piece of equipment is installed and the location on the map identified by the aforementioned map information is stored, for example, "3rd floor, 1st staircase" which identifies the 1st staircase on the 3rd floor).

[0042] Furthermore, the top-level information of this equipment information (the combination of "ID131", "detector", and "3rd floor, 1st staircase") indicates that the type of detector 131 (Figure 2) identified by "Equipment ID" = "ID131" is "detector" as indicated by "Equipment Type Information", and that the location where the detector 131 is installed is "3rd floor, 1st staircase" as indicated by "Installation Location Information" (i.e., the 1st staircase on the 3rd floor of the building).

[0043] (Configuration - Disaster Prevention Display Device - Recording Unit - Slave Unit Information) "Handset information" refers to information that identifies the emergency telephone handset included in the disaster prevention system 100. Figure 5 is an example of handset information. This handset information is interconnected, for example, as shown in Figure 5, with information corresponding to the item "Handset address information" and information corresponding to the item "Installation location information".

[0044] The information corresponding to the item "Handset Address Information" is handset address information that identifies the address set for each emergency telephone handset 5 in order to uniquely identify the emergency telephone handset 5 in communication. This handset address information is arbitrary, but for example, it is assumed that handset address information that identifies the address set for each emergency telephone handset 5 is stored in the recording unit 55 (described later) of the emergency telephone handset 5, and that this handset address information is stored. Here, for example, it is assumed that the recording unit 55 of the emergency telephone handsets 531 to 533 in Figure 2 stores "ADr531" to "Adr533" as handset address information, and that these "ADr531" to "Adr533" etc. are stored as handset address information in Figure 5. The information corresponding to the item "Installation Location Information" is the same as the information with the same name in Figure 2, and specifically, it is installation location information that identifies the location where the emergency telephone handset 5 is installed (in Figure 5, it is assumed that information is stored that identifies the floor on which the emergency telephone handset 5 is installed and the location on the map identified by the aforementioned map information, for example, "3rd floor, 1st staircase" which identifies the 1st staircase on the 3rd floor).

[0045] Furthermore, the top-level information in this handset information (the combination of "Adr531" and "3rd floor, 1st staircase") indicates that the emergency telephone handset 531, which has "Handset Address Information" = "Adr531" set, is installed on the "3rd floor, 1st staircase" as indicated by the "Installation Location Information" (i.e., the 1st staircase on the 3rd floor of the building).

[0046] (Configuration - Disaster Prevention Display Device - Control Unit) The control unit 35 in Figure 3 is also a control means for controlling the disaster prevention display device 3. Specifically, it is a computer comprising a CPU, various programs interpreted and executed on the CPU (including basic control programs such as the OS and application programs launched on the OS to realize specific functions), and internal memory such as RAM for storing programs and various data (the same applies to the control units of other devices). In particular, the control program according to this embodiment is installed on the disaster prevention display device 3 via any recording medium or network, thereby substantially constituting each part of the control unit 35 (the same applies to the control units of other devices). The processing performed by this control unit 35 will be described later.

[0047] (Configuration - Emergency telephone base unit) Figure 6 is a block diagram showing the functions of the emergency telephone master unit. The emergency telephone master unit 4 in Figure 1 is, for example, connected to various devices of the disaster prevention system 100 (various devices including the disaster prevention display device 3) for communication purposes, and is also connected to each emergency telephone handset 5 via the telephone-side transmission line L1 and the telephone line L2.

[0048] The telephone transmission line L1 is a line through which various signals are transmitted for various controls, such as establishing or disconnecting a call between the emergency telephone base unit 4 and the emergency telephone handset 5 via telephone line L2. Telephone line L2 is a line for making a call between the emergency telephone base unit 4 and the emergency telephone handset 5, and is a line through which voice signals in a predetermined frequency band are transmitted.

[0049] The emergency telephone master unit 4 includes, for example, a communication unit 41, a master telephone unit 42, a display unit 43, an operation unit 44, an acoustic unit 45, a recording unit 46, and a control unit 47, as shown in Figure 6.

[0050] (Configuration - Emergency telephone base unit - Communications unit) The communication unit 41 in Figure 6 is a communication means that communicates various signals with the emergency telephone handset 5 via the telephone-side transmission line L1.

[0051] (Configuration - Emergency telephone base unit - Base telephone unit) The master telephone unit 42 in Figure 6 is a communication means that realizes the function of making a call with the emergency telephone handset 5, and is a means for communicating voice signals via the telephone line L2. The configuration of this master telephone unit 42 is arbitrary, and any configuration including known configurations (for example, the configuration described in Japanese Patent Application Publication No. 2019-129362) can be applied, so only an outline will be described. This master telephone unit 42 can be configured, for example, with a master telephone 421, a master switch circuit 422, and a master hook switch 423.

[0052] The master telephone 421 is the part held by the user when making a call, and includes, for example, a handset, a transmitter, and a case that houses the handset and transmitter (for example, a known case that is held by the user and brought from the user's ear to their mouth).

[0053] The master switch circuit 422 is electrically connected between the master telephone 421 and the telephone line L2, and is a switch circuit that electrically connects the master telephone 421 and the telephone line L2 to each other (i.e., "on") or electrically disconnects the master telephone 421 and the telephone line L2 to each other (i.e., "off").

[0054] The master-side hook switch 423 is a switch for detecting whether the master-side telephone 421 is being held in a holding part (not shown) on the housing of the emergency telephone master unit 4, or whether it has been removed from the holding part. For example, the master-side hook switch 423 is configured to output an off-hook signal (i.e., a signal indicating that the master-side telephone 421 has been removed from the holding part) to the control unit 47 after detecting that the master-side telephone 421 has been removed (i.e., off-hook) by the user in order to make a call. Furthermore, the master-side hook switch 423 is configured to output an on-hook signal (i.e., a signal indicating that the master-side telephone 421 has been returned to the holding part and is being held) to the control unit 47 after detecting that the master-side telephone 421 has been returned to the holding part and is being held by the user when a call has ended (i.e., on-hook) by the user.

[0055] (Configuration - Emergency telephone base unit - Display unit) The display unit 43 in Figure 6 is a display means for displaying various types of information. The specific type and configuration of this display unit 43 are arbitrary, but for example, it can be configured using various indicator lights that display information by emitting light, or any display (for example, a 7-segment display).

[0056] (Configuration - Emergency telephone base unit - Control panel) The operation unit 44 in Figure 6 is an operating means for inputting various types of information. The specific type and configuration of this operation unit 44 are arbitrary, but for example, it can be configured using known operation buttons or the like.

[0057] (Configuration - Emergency telephone base unit - Audio unit) The acoustic unit 45 in Figure 6 is an acoustic means for outputting various types of sound information. The specific type and configuration of this acoustic unit 45 are arbitrary, but for example, it can be configured using a known speaker or the like.

[0058] (Configuration - Emergency telephone base unit - Recording unit) The recording unit 46 in Figure 6 is a recording means for recording the program and various data necessary for the operation of the emergency telephone master unit 4.

[0059] (Configuration - Emergency telephone base unit - Control unit) The control unit 47 in Figure 6 also serves as a control means for controlling the emergency telephone master unit 4. The processing performed by this control unit 47 will be described later.

[0060] (Configuration-Emergency phone handset) Figure 7 is a block diagram showing the functions of an emergency telephone handset. The emergency telephone handset 5 in Figure 1 is connected to, for example, the emergency telephone base unit 4 via telephone-side transmission line L1 and telephone line L2.

[0061] The emergency telephone handset 5 includes, for example, a communication unit 51, a sub-telephone unit 52, a display unit 53, an acoustic unit 54, a recording unit 55, and a control unit 56, as shown in Figure 7.

[0062] (Configuration-Emergency phone handset-Communication department) The communication unit 51 in Figure 7 is a communication means that communicates various signals with the emergency telephone master unit 4 via the telephone-side transmission line L1.

[0063] (Configuration-Emergency phone handset-Slave phone part) The child-side telephone unit 52 in Figure 7 is a means of communication that enables communication with the emergency telephone master unit 4, and is a means of communicating voice signals via the telephone line L2. The configuration of this child-side telephone unit 52 is arbitrary and can be configured in the same way as the master-side telephone unit 42 in Figure 6, for example, it can be configured to include a child-side telephone 521, a child-side switch circuit 522, and a child-side hook switch 523.

[0064] The child-side telephone 521 is the part held by the user when making a call, and can be configured in the same way as the master-side telephone 421 in Figure 6, for example.

[0065] The child-side switch circuit 522 can be configured in the same way as the parent-side switch circuit 422 in Figure 6, that is, it is electrically connected between the child-side telephone 521 and the telephone line L2, and is a switch circuit that electrically connects (i.e., "turns on") the child-side telephone 521 and the telephone line L2 to each other, or electrically disconnects (i.e., "turns off") the child-side telephone 521 and the telephone line L2 to each other.

[0066] The child-side hook switch 523 is a switch for detecting whether the child-side telephone 521 is being held in the holding part (not shown) of the housing of the emergency telephone handset 5, or whether it has been removed from the holding part. The child-side hook switch 523 can be configured in the same way as the master-side hook switch 423, that is, for example, when the child-side telephone 521 is removed from the holding part by the user to make a call (i.e., it is off-hooked), the child-side hook switch 523 is configured to detect that it has been removed (i.e., after detecting that it is off-hooked) and output an off-hook signal (i.e., a signal indicating that the child-side telephone 521 has been removed from the holding part) to the control unit 56. The child-side hook switch 523 is also configured to detect when the child-side telephone 521 is returned to the holding part and held by the user after a call has ended (i.e., it is on-hooked), and output an on-hook signal (i.e., a signal indicating that the child-side telephone 521 has been returned to the holding part and held) to the control unit 56.

[0067] (Configuration - emergency phone handset - display) The display unit 53 in Figure 7 is a display means for displaying various types of information, and can be configured in the same way as the display unit 43 in Figure 6, for example.

[0068] (Configuration-Emergency phone handset-Sound part) The acoustic unit 54 in Figure 7 is an acoustic means for outputting various sound information, and can be configured in the same manner as the acoustic unit 45 in Figure 6, for example.

[0069] (Configuration - Emergency telephone handset - Recording unit) The recording unit 55 in Figure 7 is a recording means for recording the program and various data necessary for the operation of the emergency telephone handset 5. As mentioned above, this recording unit 55 stores, for example, the handset address information.

[0070] (Configuration - Emergency telephone handset - Control unit) The control unit 56 in Figure 7 also serves as a control means for controlling the emergency telephone handset 5. The processing performed by this control unit 56 will be described later.

[0071] (process) Next, we will explain the fire location display processing and the communication processing, which are among the disaster prevention processes performed by the disaster prevention system 100 configured in this way.

[0072] (Processing - Fire location display processing) First, let's explain the fire location display process. Figure 8 is a flowchart of the fire location display process (in the following explanations of each process, steps will be abbreviated as "S"). The "fire location display process" is, in general terms, a process performed by the disaster prevention display device 3, and is a process to display information indicating the location of a fire on a map showing the monitoring area, for example, when a fire occurs. The timing of executing this fire location display process is arbitrary, but for example, it will be assumed that it will be repeatedly executed when the power to each device of the disaster prevention system 100 is turned on, and the explanation will begin from the point when the execution of the fire location display process has started. Here, for example, we will explain using the case where a fire occurs on the first staircase on the third floor of the building shown in Figure 2 (the part shown in the upper left of the drawing).

[0073] In SA1 of Figure 8, the control unit 35 of the disaster prevention display device 3 determines whether or not a fire has occurred. Specifically, although it is optional, for example, when detector 1 detects a fire, it transmits a fire occurrence signal including an equipment ID that identifies detector 1 itself to the disaster prevention receiver 2 via the detector-side transmission line L3. When the disaster prevention receiver 2 receives the fire occurrence signal, it transmits fire occurrence information (information indicating that a fire has occurred), including the equipment ID contained in the fire occurrence signal, to the disaster prevention display device 3. The control unit 35 of the disaster prevention display device 3 then determines that no fire has occurred (SA1 NO) if it has not received fire occurrence information, and repeatedly executes SA1 until it determines that a fire has occurred. If it receives fire occurrence information, it determines that a fire has occurred (SA1 YES) and proceeds to SA2.

[0074] The processing described here may be modified as needed. For example, the control unit 35 of the disaster prevention display device 3 may be configured to directly receive a fire occurrence signal from the detector 1, and then perform the processing of SA1 based on whether or not the fire occurrence signal has been received.

[0075] Here, for example, if a fire occurs on the first staircase on the third floor of the building shown in Figure 2 (the part shown in the upper left of the drawing), the detector 131 detects the fire and transmits a fire occurrence signal containing its own equipment ID, "ID131," to the fire prevention receiver 2. When the fire prevention receiver 2 receives the fire occurrence signal, it transmits fire occurrence information containing "ID131" to the fire prevention display device 3. In this case, the control unit 35 of the fire prevention display device 3 receives fire occurrence information containing "equipment ID" = "ID131" and determines that a fire has occurred (SA1 YES).

[0076] In SA2 of Figure 8, the control unit 35 of the disaster prevention display device 3 identifies the location of the fire (i.e., the position where the fire occurred). Specifically, although it is arbitrary, for example, it obtains the equipment ID included in the fire occurrence information received in SA1, refers to the equipment information in Figure 4 to obtain the installation location information associated with the obtained equipment ID, and identifies the location indicated by the obtained installation location information as the location of the fire.

[0077] Here, for example, the "Equipment ID" = "ID131" included in the fire occurrence information received by SA1 is obtained, and the "Installation Location Information" = "3rd Floor, 1st Staircase" associated with the aforementioned "Equipment ID" = "ID131" is obtained by referring to the equipment information in Figure 5, and the 1st staircase on the 3rd floor, indicated by the obtained "3rd Floor, 1st Staircase," is identified as the location of the fire.

[0078] In SA3 shown in Figure 8, the control unit 35 of the disaster prevention display device 3 displays the fire location display screen. Figure 9 is an example of the fire location display screen.

[0079] ===Fire location display screen=== The "fire location display screen" is a screen that displays the location where a fire has occurred, and includes images such as map image G500, fire symbol image G501, and handset symbol images G531-G533. While it is desirable to include handset symbol images G531-G533 in the "fire location display screen," they may be omitted. "Map image" G500 is an image showing a map, such as a floor plan of each floor of a building. "Fire symbol image" G501 is information indicating the location of the fire, and is a symbol image showing a flame, displayed at the location corresponding to where the fire occurred. "Handset symbol images" G531-G533 are information displayed at the location corresponding to the installation location of the emergency telephone handset 5, and are symbol images showing a telephone.

[0080] ===Processing=== The specific processing of SA3 in Figure 8 is arbitrary, but for example, first, map information corresponding to the floor indicated by the location identified by SA2 is obtained from the "1st floor map information" to "3rd floor map information" stored as map information in the recording unit 34 in Figure 3, and the slave unit address information associated with the installation location information corresponding to the floor indicated by the location identified by SA2 is identified by referring to the slave unit information in Figure 5. Next, a map image corresponding to the acquired map information is generated, and a fire symbol image is superimposed and displayed on the generated map image at the location corresponding to the location identified by SA2, and a slave unit symbol image is superimposed and displayed on the generated map image at the location indicated by the installation location information associated with the identified slave unit address information, thereby generating a fire location display screen, and the generated fire location display screen is displayed on the display unit 32.

[0081] In this case, each child unit symbol image will be displayed superimposed on the child unit, with the child unit address information (i.e., the previously identified child unit address information (Figure 5)) located at the position where the child unit symbol image is displayed associated with it. The association of child unit address information may be interpreted as meaning, for example, that when a user clicks and selects a child unit symbol image using the operation unit 33, the child unit address information associated with the selected child unit symbol image is input to the disaster prevention display device 3.

[0082] For example, first, the system retrieves the "3rd floor map information" from the "1st floor map information" to "3rd floor map information" stored as map information in the recording unit 34 in Figure 3, as this corresponds to the "3rd floor" which is the floor indicated by the location identified by SA2, "the first staircase on the 3rd floor." Then, by referring to the slave unit information in Figure 5, the system identifies the "slave unit address information" = "Adr531," "Adr532," and "Adr533" associated with the "installation location information" = "3rd floor, 1st staircase," "3rd floor, 2nd corridor," and "3rd floor, 3rd corridor," which correspond to the "3rd floor" which is the floor indicated by the location identified by SA2. Next, a map image 500 corresponding to the acquired map information, "Map Information for the 3rd Floor," is generated. A fire symbol image G501 is superimposed and displayed on the generated map image 500 at the location corresponding to "First Staircase on the 3rd Floor," which is the location identified by SA2. Furthermore, sub-unit symbol images G531 to G533 are superimposed and displayed on the generated map image 500 at the locations indicated by the "Installation Location Information" associated with the identified sub-unit address information, namely "3rd Floor, First Staircase," "3rd Floor, Second Corridor," and "3rd Floor, Third Corridor," thereby generating the fire location display screen shown in Figure 9, and the generated fire location display screen is displayed on the display unit 32.

[0083] In this case, the child unit symbol image G531 will be associated with the child unit address information = "Adr531", the child unit symbol image G532 will be associated with the child unit address information = "Adr532", and the child unit symbol image G533 will be associated with the child unit address information = "Adr533". In other words, in this case, when the user clicks and selects a child unit symbol image G531 to G533 using the operation unit 33, the child unit address information = "Adr531", "Adr532", and "Adr533" associated with the clicked child unit symbol image G531 to G533 will be input to the disaster prevention display device 3.

[0084] By viewing the fire location display screen shown on the display unit 32, it becomes possible to recognize the location of the fire and take appropriate action. This concludes the fire location display process.

[0085] (Processing - Call Processing) Next, we will explain the call processing. Figures 10 and 11 are flowcharts of the call processing. In general terms, "call processing" refers to the processing performed by the disaster prevention display device 3, the emergency telephone base unit 4, and the emergency telephone handset 5. The timing of executing this call processing is arbitrary, but for example, it will be activated when call processing start information is input to the disaster prevention display device 3 by the user performing a predetermined operation via the operation unit 33 of the disaster prevention display device 3, and the explanation will begin from the point when the execution of the call processing has started. Note that "call processing start information" is information corresponding to the command to start the call processing, and for example, it is information that includes floor information indicating the floor on which the emergency telephone handset 5, which will be communicating with the emergency telephone base unit 4, is located.

[0086] Here, we will explain using an example where, for instance, the emergency telephone base unit 4 calls the emergency telephone handset 531 shown in Figure 2, and a call is made between these devices. In other words, we will explain the case where the call processing is initiated when the user on the emergency telephone base unit 4 inputs call processing start information, including "floor information" = "3rd floor" (floor information indicating the floor on which the emergency telephone handset 531 is installed), to the emergency telephone base unit 4 via the operation unit 33 of the disaster prevention display device 3. Furthermore, when the call processing is initiated, we will explain assuming that the master telephone 421 shown in Figure 6 is held (i.e., on-hooked) in the holding part (not shown) of the housing of the emergency telephone base unit 4, and similarly, each of the handset telephones 521 shown in Figure 7 is held (i.e., on-hooked) in the holding part (not shown) of the housing of the emergency telephone handset 5. Furthermore, when call processing is initiated, the master switch circuit 422 in Figure 6 is "off," and the master telephone 421 and the telephone line L2 are electrically isolated from each other. Similarly, the child switch circuit 522 in Figure 7 is also "off," and the child telephone 521 and the telephone line L2 are electrically isolated from each other.

[0087] In SB1 of Figure 10, the control unit 35 of the disaster prevention display device 3 displays a screen for selecting a sub-unit. Figure 12 is an example of an image for selecting a sub-unit. The "sub-unit selection image" is, for example, an image for selecting the emergency telephone sub-unit 5 to be used for a call, and includes, for example, a map image G500 and sub-unit symbol images G531 to G533. The processing of SB1 is specific and arbitrary; for example, part of it is the same as the processing of SA3 in Figure 8, that is, first, map information corresponding to the floor indicated by the floor number information included in the "call processing start information" entered when the call processing is started is obtained from the "1st floor map information" to "3rd floor map information" stored as map information in the recording unit 34 of Figure 3, and then, by referring to the sub-unit information in Figure 5, the sub-unit address information associated with the installation location information corresponding to the floor indicated by the aforementioned floor number information is identified. Next, a map image corresponding to the acquired map information is generated, and a slave unit symbol image is superimposed on the generated map image at a position corresponding to the location indicated by the installation location information associated with the identified slave unit address information, thereby generating a slave unit selection image, which is then displayed on the display unit 32.

[0088] In this case, as in the case described above, each slave unit symbol image will be displayed superimposed with the slave unit address information (i.e., the identified slave unit address information (Figure 5)) located at the position where each slave unit symbol image is displayed. Also, in this case, since the "prescribed operation to instruct preparation for making a call" has not yet been performed, the "normal state" described above is identified, and the slave unit symbol image in the slave unit selection image is displayed in "cyan" as the display mode corresponding to the "normal state".

[0089] Here, for example, first, the "Map Information for the 3rd Floor" is obtained as the map information corresponding to the 3rd floor indicated by the "Floor Information" = "3rd Floor" included in the "Call Processing Start Information" entered when the call processing is initiated, from the "Map Information for the 1st Floor" to "Map Information for the 3rd Floor" stored as map information in the recording unit 34 of Figure 3. Then, by referring to the handset information in Figure 5, the "Handset Address Information" = "Adr531", "Adr532", and "Adr533", which are associated with the "Installation Location Information" = "3rd Floor, 1st Staircase", "3rd Floor, 2nd Corridor", and "3rd Floor, 3rd Corridor", respectively, that correspond to the 3rd floor indicated by the aforementioned "Floor Information" = "3rd Floor", are identified. Next, a map image G500 corresponding to the acquired map information, "3rd floor map information," is generated. On the generated map image G500, the child unit symbol images G531 to G533 are superimposed and displayed at positions corresponding to the locations indicated by the "installation location information" = "3rd floor, 1st staircase," "3rd floor, 2nd corridor," and "3rd floor, 3rd corridor" associated with the identified child unit address information, thereby generating the child unit selection image shown in Figure 12. The generated child unit selection image is then displayed on the display unit 32. In this case, "normal state" is identified, and the child unit symbol images G531 to G533 are displayed in "cyan."

[0090] In SB2 of Figure 10, the control unit 35 of the disaster prevention display device 3 determines whether or not to instruct the device to prepare to make a call. Specifically, although it is optional, for example, it monitors the operation unit 33 to determine whether or not a "predetermined operation to instruct the device to prepare to make a call" has been performed, and makes a decision based on the result of that determination. A "predetermined operation to instruct the device to prepare to make a call" is, for example, a predetermined operation to establish a call between the emergency telephone base unit 4 and the emergency telephone handset 5. One example is the operation of clicking and selecting the handset symbol image G531 on the handset selection screen in Figure 12. If it is determined that the "predetermined operation to instruct the device to prepare to make a call" has not been performed, it is determined not to instruct the device to prepare to make a call (NO in SB2), and SB2 is repeatedly executed until it is determined that the device should instruct the device to prepare to make a call. On the other hand, if it is determined that the "predetermined operation to instruct the device to prepare to make a call" has been performed, it is determined to instruct the device to prepare to make a call (YES in SB2), and the device proceeds to SB3.

[0091] Here, for example, if the user clicks and selects the slave unit symbol image G531 in Figure 12 via the operation unit 33, it is determined that a "predetermined operation to instruct preparation for making a call" has been performed, and then it is determined that the instruction to prepare for making a call is to be given (YES for SB2).

[0092] In SB3 of Figure 10, the control unit 35 of the disaster prevention display device 3 changes the display mode of the slave unit symbol image in the slave unit selection image. Specifically, although it is arbitrary, for example, it identifies the aforementioned "call standby state" and displays the slave unit symbol image selected in SB2 in the slave unit selection image in "yellow" as the display mode corresponding to the "call standby state".

[0093] Here, for example, the "call standby state" is identified, and the handset symbol image G531 selected by SB2 in the handset selection image is displayed in "yellow". In this case, handset symbol images G532 to G533 remain displayed in "cyan".

[0094] In SB4 of Figure 10, the control unit 35 of the disaster prevention display device 3 transmits a call preparation signal to the emergency telephone base station 4. The "call preparation signal" is a signal that instructs the system to prepare to make a call, and for example, it is a signal that includes the handset address information of the emergency telephone handset 5 to be called (i.e., the emergency telephone handset 5 that will be called and a call established). Specifically regarding the processing of SB3, for example, as mentioned above, the handset symbol image displayed on the handset selection screen is associated with the handset address information, and when the handset symbol image is selected, the handset address information associated with the selected handset symbol image is input. Based on this, the following processing is performed. In detail, when a "predetermined operation to instruct the system to prepare to make a call" (an operation to select a handset symbol image by clicking on it) is performed, the system acquires the handset address information input to the disaster prevention display device 3 (the handset address information associated with the clicked handset symbol image), generates a call preparation signal that includes the acquired handset address information, and transmits the generated call preparation signal to the emergency telephone base station 4. Furthermore, this SB4 process may be interpreted as corresponding to "the process for establishing communication between the emergency telephone handset 5 and the emergency telephone base unit 4."

[0095] Here, for example, in the "predetermined operation to instruct preparation for making a call" of SB2, the slave unit symbol image G531 in Figure 12 is selected, so the "slave unit address information" = "Adr531" associated with the slave unit symbol image G531 is input to the disaster prevention display device 3, and a call preparation signal including this "slave unit address information" = "Adr531" is generated and transmitted.

[0096] Meanwhile, in SC1 of Figure 10, the control unit 47 of the emergency telephone base unit 4 receives the call preparation signal transmitted by SB4. Here, for example, it receives a call preparation signal that includes "handset address information" = "Adr531".

[0097] In SC2 of Figure 10, the control unit 47 of the emergency telephone base station 4 indicates that it has received a call preparation signal. Here, for example, the indicator light on the display unit 43 flashes, or information is displayed on the 7-segment display to indicate that a call preparation signal has been received and the unit is waiting to make a call (i.e., waiting for an off-hook call). In this case, users around the emergency telephone base station 4 can recognize that the emergency telephone base station 4 is waiting to make a call by looking at the display unit 43.

[0098] In SC3 of Figure 10, the control unit 47 of the emergency telephone master unit 4 determines whether or not to make a call (i.e., whether or not to make a phone call). Specifically, although arbitrary, the determination is made based on whether or not the master telephone 421 in Figure 6 has been removed from the holding unit. If the master telephone 421 has not been removed from the holding unit (i.e., the user is not yet holding the master telephone 421) and the master hook switch 423 is not outputting an off-hook signal, it is determined not to make a call (NO in SC3), and SC3 is repeatedly executed until it is determined to make a call. On the other hand, if the master telephone 421 has been removed from the holding unit (i.e., the user is holding the master telephone 421) and the master hook switch 423 is outputting an off-hook signal, it is determined to make a call (YES in SC3), and the process proceeds to SC4.

[0099] Here, for example, if a user near the emergency telephone base unit 4 holds the base telephone 421 to make a call, the base hook switch 423 detects the off-hook state and outputs an off-hook signal, in which case it is determined that a call is being made (SC3 YES).

[0100] In SC4 of Figure 10, the control unit 47 of the emergency telephone base unit 4 transmits a call signal to the emergency telephone handset 5. The "call signal" is a signal for establishing a call, and for example, it is a signal that includes the handset address information of the emergency telephone handset 5 to be called (i.e., the emergency telephone handset 5 that is to be called and to which a call will be established). Specifically regarding the processing of SC3, for example, it acquires the handset address information contained in the call preparation signal received in SC1, generates a call signal including the acquired handset address information, and transmits the generated call signal to the emergency telephone handset 5 via the telephone-side transmission line L1 (Figure 1).

[0101] Here, for example, the "sub-unit address information" = "Adr531" included in the call preparation signal received by SC1 is acquired, a call signal containing the acquired "sub-unit address information" = "Adr531" is generated, and the generated call signal is transmitted to the emergency telephone sub-unit 5 via the telephone-side transmission line L1. In this case, the call signal will reach all emergency telephone sub-units 5.

[0102] Meanwhile, in SD1 of Figure 10, the control unit 56 of the emergency telephone handset 5 receives the call signal transmitted by SC4 via the telephone-side transmission line L1. Here, for example, it receives a call signal that includes "handset address information" = "Adr531".

[0103] In SD2 of Figure 10, the control unit 56 of the emergency telephone handset 5 determines whether or not to connect the call. Specifically, although arbitrary, the determination is made based on whether or not the call signal received in SD1 is a call signal to establish a call with itself. The control unit then obtains the handset address information contained in the call signal received in SD1, compares the obtained handset address information with the handset address information recorded in its own recording unit 55, and if the handset address information does not match, it is determined that the call signal received in SD1 is not a call signal to establish a call with itself, and therefore the call will not be connected (NO in SD2), and SD2 is executed again. On the other hand, if the handset address information that was compared matches, it is determined that the call signal received in SD1 is a call signal to establish a call with itself, and therefore the call will be connected (YES in SD2), and the process moves to SD3.

[0104] Here, for example, the emergency telephone handset 531 in Figure 2 acquires the "handset address information" = "Adr531" included in the call signal received by SD1, compares the acquired "handset address information" = "Adr531" with the "handset address information" = "Adr531" recorded in its own recording unit 55, and since the respective handset address information matches, it determines that the call signal received by SD1 is a call signal to establish a call with itself, and therefore the call will be connected (YES in SD2). On the other hand, for example, the emergency telephone handsets 532-533 in Figure 2 and the emergency telephone handsets 5 on the 1st and 2nd floors determine that the call will not be connected (NO in SD2).

[0105] In SD3 of Figure 10, the control unit 56 of the emergency telephone handset 5 transmits a response signal to the emergency telephone base unit 4 via the telephone-side transmission line L1 (Figure 1). The "response signal" is a signal that notifies the emergency telephone base unit 4 that it has received a call signal to establish a conversation with itself. Here, for example, the emergency telephone handset 531 in Figure 2 transmits a response signal.

[0106] In SD4 of Figure 10, the control unit 56 of the emergency telephone handset 5 establishes a call. Specifically, although optional, for example, by turning on the child-side switch circuit 522 in Figure 7, the child-side telephone 521 and the telephone line L2 are electrically connected to each other. Here, for example, the emergency telephone handset 531 in Figure 2 electrically connects its own child-side telephone 521 and the telephone line L2 to each other by turning on its own child-side switch circuit 522.

[0107] Meanwhile, in SC5 of Figure 10, the control unit 47 of the emergency telephone master unit 4 receives the response signal transmitted by SD3 via the telephone-side transmission line L1. Here, for example, it receives the response signal transmitted from the sub-telephone 521.

[0108] In SC6 of Figure 10, the control unit 47 of the emergency telephone master unit 4 establishes a call. Specifically, although it is optional and the same as SD4, for example, by turning on the master switch circuit 422 in Figure 6, the master telephone 421 and the telephone line L2 are electrically connected to each other. In this case, in the aforementioned SD4, the sub-telephone 521 of the emergency telephone sub-unit 531 in Figure 2 is connected to the telephone line L2, and the master telephone 421 of the emergency telephone master unit 4 is also connected to the telephone line L2. As a result, the emergency telephone master unit 4 and the emergency telephone sub-unit 531 are interconnected via the telephone line L2, and a call is established between the emergency telephone master unit 4 and the emergency telephone sub-unit 531. In other words, the user on the emergency telephone master unit 4 side and the user on the emergency telephone sub-unit 531 side can communicate with each other using the emergency telephone master unit 4 and the emergency telephone sub-unit 531.

[0109] In SC7 of Figure 10, the control unit 47 of the emergency telephone base station 4 transmits an establishment notification signal to the disaster prevention display device 3. The "establishment notification signal" is a signal used to notify the disaster prevention display device 3 that a call has been established.

[0110] Meanwhile, in SB5 of Figure 11, the control unit 35 of the disaster prevention display device 3 receives the establishment notification signal transmitted by SC7.

[0111] In SB6 of Figure 11, the control unit 35 of the disaster prevention display device 3 changes the display mode of the handset symbol image in the handset selection image. Specifically, although it is arbitrary, for example, the aforementioned "call status" is identified and the handset symbol image selected in SB2 in the handset selection image is displayed in "green" as the display mode corresponding to the "call status". Here, for example, the "call status" is identified and the handset symbol image G531 selected in SB2 in the handset selection image is displayed in "green".

[0112] Meanwhile, in SC8 of Figure 11, the control unit 47 of the emergency telephone base station 4 determines whether or not to disconnect the call. Specifically, although it is arbitrary, the determination is made based on whether or not the base telephone 421 in Figure 6 has been returned to the holding unit and is being held. If the base telephone 421 has not been returned to the holding unit and is not being held (i.e., the user is still holding the base telephone 421) and the base hook switch 423 is not outputting an on-hook signal, the control unit determines not to disconnect the call (NO in SC8) and executes SC8 again. On the other hand, if the base telephone 421 has been returned to the holding unit and is being held (i.e., the user has returned the base telephone 421 to the holding unit) and the base hook switch 423 is outputting an on-hook signal, the control unit determines to disconnect the call (YES in SC8) and proceeds to SC9.

[0113] Here, for example, if a user who was making a call on the emergency telephone base unit 4 returns the main telephone 421 to the holding part of the emergency telephone base unit 4 in order to end the call, the main hook switch 423 detects that the call is on and outputs an on-hook signal, and in this case, it is determined that the call should be terminated (YES in SC8).

[0114] In SC9 in Figure 11, the control unit 47 of the emergency telephone base unit 4 performs the process of disconnecting the call. Specifically, although optional, for example, by turning off the base-side switch circuit 422 in Figure 6, the base-side telephone 421 and the telephone line L2 are electrically disconnected from each other. It also sends a disconnection notification signal to the disaster prevention display device 3. The "disconnection notification signal" is a signal to notify the disaster prevention display device 3 that the call has been disconnected. Although not shown, it also performs the process of electrically disconnecting the sub-unit telephone 521 and the telephone line L2 of the emergency telephone sub-unit 5 that was the subject of the call. In detail, a sub-unit disconnection signal (a signal to electrically disconnect the sub-unit telephone 521 and the telephone line L2) is sent to the emergency telephone sub-unit 5 via the telephone-side transmission line L1. On the other hand, the control unit 56 of the emergency telephone sub-unit 5, upon receiving the sub-unit disconnection signal, turns off the base-side switch circuit 522 in Figure 7, thereby electrically disconnecting the sub-unit telephone 521 and the telephone line L2 from each other.

[0115] Here, for example, by turning off the master switch circuit 422 in Figure 6, the master telephone 421 and the telephone line L2 are electrically disconnected from each other, a disconnection notification signal is sent to the disaster prevention display device 3, and a sub-disconnection signal is sent to the emergency telephone handset 5. On the other hand, the emergency telephone handset 531, upon receiving the sub-disconnection signal, turns off its own sub-switch circuit 522, thereby electrically disconnecting the sub-telephone 521 and the telephone line L2 from each other. Meanwhile, the emergency telephone handsets 532-533 in Figure 2 and the emergency telephone handsets 5 on the first and second floors have their own sub-switch circuits 522 not turned on but remain "off," so no control may be performed.

[0116] Meanwhile, in SD5 of Figure 11, the control unit 56 of the emergency telephone handset 5 determines whether or not to disconnect the call. Specifically, this is arbitrary and the same as SC8, but for example, the determination is based on whether or not the handset telephone 521 in Figure 7 has been returned to the holding unit and is being held. If the handset telephone 521 has not been returned to the holding unit and is not being held (i.e., the user is still holding the handset telephone 521), and the handset hook switch 523 is not outputting an on-hook signal, the system determines not to disconnect the call (NO in SD5) and executes SD5 again. On the other hand, if the handset telephone 521 has been returned to the holding unit and is being held (i.e., the user has returned the handset telephone 521 to the holding unit), and the handset hook switch 523 is outputting an on-hook signal, the system determines to disconnect the call (YES in SD5) and proceeds to SD6.

[0117] Here, for example, if a user who was making a call on the emergency telephone handset 5 returns the handset 521 to the holder of the emergency telephone handset 5 in order to end the call, the handset hook switch 523 detects that the phone is on-hook and outputs an on-hook signal. In this case, it is determined that the call should be terminated (YES for SD5).

[0118] Meanwhile, in SD6 of Figure 11, the control unit 56 of the emergency telephone handset 5 performs a process to disconnect the call. Specifically, this is optional and similar to SC9, but for example, by turning off the child-side switch circuit 522 in Figure 7, the child-side telephone 521 and the telephone line L2 are electrically disconnected from each other. Although not shown, the main telephone 421 and the telephone line L2 of the emergency telephone base unit 4, which was the subject of the call, are also electrically disconnected from each other. In detail, a base disconnection signal (a signal to electrically disconnect the main telephone 421 and the telephone line L2) is transmitted to the emergency telephone base unit 4 via the telephone-side transmission line L1. Meanwhile, the control unit 47 of the emergency telephone base unit 4, upon receiving the base disconnection signal, turns off the main switch circuit 422 in Figure 6, thereby electrically disconnecting the main telephone 421 and the telephone line L2 from each other. In this case, the control unit 47 of the emergency telephone master unit 4 transmits a disconnection notification signal to the disaster prevention display device 3, similar to the case of SC9.

[0119] Here, for example, the regular telephone handset 531 electrically disconnects the handset 521 from the telephone line L2 by turning off the handset switch circuit 522 in Figure 7, and also transmits a master disconnection signal to the emergency telephone master unit 4. On the other hand, the emergency telephone master unit 4, upon receiving the disconnection signal, electrically disconnects the master telephone 421 from the telephone line L2 by turning off its own master switch circuit 422, and in this case also transmits a disconnection notification signal to the disaster prevention display device 3.

[0120] Meanwhile, in SB7 of Figure 11, the control unit 35 of the disaster prevention display device 3 receives the disconnection notification signal transmitted by SC9 or SD6.

[0121] In SB8 of Figure 11, the control unit 35 of the disaster prevention display device 3 changes the display mode of the handset symbol image in the handset selection image. Specifically, although it is arbitrary, for example, the aforementioned "normal state" is identified, and the handset symbol image selected in SB2 in the handset selection image is displayed in "cyan" as the display mode corresponding to the "normal state". Here, for example, the "normal state" is identified, and the handset symbol image G531 selected in SB2 in the handset selection image is displayed in "cyan". In other words, in this case, all handset symbol images G531 to G533 are displayed in "cyan". With this, the call processing is terminated.

[0122] (Effects of the embodiment) As described above, according to this embodiment, by displaying a handset symbol image (symbol information) corresponding to the emergency telephone handset 5, the installation location of the emergency telephone handset can be determined without having to, for example, use a map on paper to confirm the installation location of the emergency telephone handset, making it possible to easily establish communication between the emergency telephone base unit 4 and the emergency telephone handset 5.

[0123] Furthermore, the disaster prevention display device 3 (display device) performs processing to establish a call between the emergency telephone handset 5 and the emergency telephone base unit 4, which corresponds to the handset symbol image selected by a predetermined operation. For example, the user does not need to input information indicating the building, floor, district, and number as information indicating the location of the emergency telephone handset 5 to be called to the emergency telephone base unit 4. This makes it possible to easily establish a call between the emergency telephone base unit 4 and the emergency telephone handset 5.

[0124] Furthermore, by displaying the handset symbol image in a display mode corresponding to the call status, it becomes possible to recognize the call status by, for example, visually inspecting the handset symbol image.

[0125] [Modifications of the embodiment] While embodiments of the present invention have been described above, the specific configurations and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of ​​each invention described in the claims. Such modifications will be described below.

[0126] (Regarding the problems 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 and details of the invention's configuration. In some cases, only a portion of the problems described above may be solved, or only a portion of the effects described above may be achieved.

[0127] (Regarding decentralization and integration) Furthermore, the above-described configuration is a functional concept and does not necessarily require that the physical structure be as shown in the diagram. In other words, the specific forms of distribution and integration of each part are not limited to those shown in the diagram, and all or part of them can be functionally or physically distributed or integrated in any unit.

[0128] (Regarding the selection of the handset symbol image) Furthermore, although the above embodiment describes the case in which a sub-unit symbol image is selected on the sub-unit selection screen of Figure 12, it is not limited to this. For example, the system may be configured to select a sub-unit symbol image on the fire location display screen of Figure 9. That is, when a sub-unit symbol image displayed on the fire location display screen of Figure 9 is selected by clicking via the operation unit 33, the system may be configured to determine in SB2 of Figure 10 that a call preparation is to be instructed (SB2 YES).

[0129] (Regarding other features) In addition to the above embodiments, in the fire location display screen in Figure 9 and the handset selection screen in Figure 12, the handset symbol image corresponding to the emergency telephone handset related to the fire alarm may be displayed in a manner that distinguishes it from other handset symbol images. For example, a relationship between a detector and an emergency telephone handset may be established in advance to identify the emergency telephone handset associated with the fire alarm based on the detector that triggered the fire alarm. Alternatively, even without a pre-established relationship between a detector and an emergency telephone handset, an emergency telephone handset corresponding to an emergency telephone handset symbol within a predetermined range from the fire symbol image 501 on the fire location display screen may be identified as the emergency telephone handset associated with the fire alarm. For example, the handset symbol image corresponding to an emergency telephone handset related to fire alarms may flash or otherwise be displayed. In this way, the user of the disaster prevention display device 3 can be assisted in making a call to an emergency telephone handset located near the detector that triggered the fire alarm.

[0130] Furthermore, the display format of the handset symbol image may be changed based on the actual record of establishing communication between the emergency telephone handset and the emergency telephone base unit from the time the fire alarm is issued until the fire is restored based on the fire alarm. For example, the handset symbol image for an emergency telephone handset that has established a call with the main emergency telephone unit and then ended the call may be displayed in a way that makes it distinguishable from other emergency telephone handset symbols, for example, by superimposing a circular image. Similarly, the handset symbol image for an emergency telephone handset that was called by the main emergency telephone unit but did not establish a call may be displayed in a way that makes it distinguishable from other emergency telephone handset symbols, for example, by superimposing an "X" image. This allows the user of the disaster prevention display device 3 to be assisted in selecting an emergency telephone handset when they wish to make another call after ending a call with the handset, and to avoid duplicate calls to emergency telephone handsets when sequentially calling them until a call is established.

[0131] (Emergency phone handset) Furthermore, although the above embodiment describes the case where a call is made from the emergency telephone base unit 4, the system may also be configured to allow calls to be made from the emergency telephone handset 5 to the emergency telephone base unit 4. In this configuration, the disaster prevention display device 3 may be configured to identify the floor where the emergency telephone handset 5 that made the call is installed, and to display a handset symbol image at a position corresponding to the installation location of the emergency telephone handset 5 on the floor where the emergency telephone handset 5 that made the call is installed, on the map image corresponding to the identified floor. In this case, the handset symbol image corresponding to the emergency telephone handset 5 making the call may be displayed in a flashing manner to make it stand out.

[0132] (others) Various other functions may be implemented. For example, incoming, outgoing, and disconnected calls may be recorded in a history, and redialing may be possible by selecting from the history. Alternatively, multiple disaster prevention display devices may be connected to a network, each equipped with a handset, and call audio may be transferred between the display devices so that incoming, outgoing, and disconnected calls can be performed similarly on all of them. Furthermore, the system may be configured to display symbols such as those for sensors, and clicking on these symbols may highlight (flashe, etc.) nearby emergency telephone handsets. Additionally, the handset of the disaster prevention display device and the emergency telephone base unit may be integrated into a single unit. It may also be integrated with the emergency telephone base unit itself. Moreover, if the disaster prevention display device and the emergency telephone base unit are installed in separate buildings or other distant locations, the communication line may be extended and the handset may be installed near the disaster prevention display device.

[0133] (Regarding the features) Furthermore, the features of the above embodiments and the features of the modified embodiments may be combined in any way.

[0134] (Note) The disaster prevention system described in Appendix 1 comprises an emergency telephone master unit, an emergency telephone sub-unit located in a monitoring area and capable of communicating with the emergency telephone master unit, and a display device that displays information indicating the location of a fire on a map showing the monitoring area when a fire occurs, wherein the display device displays symbol information corresponding to the emergency telephone sub-unit at a location on the map corresponding to the location where the emergency telephone sub-unit is located in the monitoring area.

[0135] The disaster prevention system described in Appendix 2, in the disaster prevention system described in Appendix 1, when the display device performs a predetermined operation for establishing a call between the emergency telephone base unit and the emergency telephone handset, which is to select the symbol information corresponding to the emergency telephone handset to be used to establish a call with the emergency telephone base unit, the display device performs a process for establishing a call between the emergency telephone handset corresponding to the symbol information selected by the predetermined operation and the emergency telephone base unit.

[0136] The disaster prevention system in Appendix 3, in the disaster prevention system described in Appendix 1 or 2, the display device identifies the status of a call between the emergency telephone base unit and the emergency telephone sub-unit, and displays the symbol information in a display mode corresponding to the identified status.

[0137] (Effect of the note) According to the disaster prevention system described in Appendix 1, by displaying symbolic information corresponding to the emergency telephone handset, the location of the emergency telephone handset can be determined without having to, for example, use a map on paper to confirm the installation location of the emergency telephone handset. This makes it possible to easily establish communication between the emergency telephone base unit and the emergency telephone handset.

[0138] According to the disaster prevention system described in Appendix 2, the display device performs processing to establish a call between the emergency telephone handset and the emergency telephone base station corresponding to the symbol information selected by a predetermined operation. For example, the user does not need to input information indicating the building, floor, district, and number as information indicating the location of the emergency telephone handset to be called to the emergency telephone base station, thus making it possible to easily establish a call between the emergency telephone base station and the emergency telephone handset.

[0139] According to the disaster prevention system described in Appendix 3, by displaying symbol information in a display mode corresponding to the status of a call, it becomes possible to recognize the status of a call by, for example, visually inspecting the symbol information. [Explanation of symbols]

[0140] 1 sensor 2. Disaster prevention receiver 3 Disaster prevention display device 4. Emergency telephone base unit 5 Emergency phone handset 31 Communications Department 32 Display section 33 Operation section 34 Records Section 35 Control Unit 41 Communications Department 42 Parent-side telephone section 43 Display section 44 Control section 45 Sound department 46 Records Section 47 Control Unit 51 Communications Department 52 Child-side telephone section 53 Display section 54 Sound department 55 Records Section 56 Control Unit 100 Disaster Prevention Systems 131 Sensor 132 Sensor 421 Main telephone 422 Master switch circuit 423 Parent-side hook switch 521 Child phone 522 Sub-switch circuit 523 Child-side hook switch 531 Emergency phone handset 532 Emergency phone handset 533 Emergency phone handset G531 Handset Symbol Image G532 handset symbol image G533 Handset Symbol Image G500 Map Image G501 Fire Symbol Image L1 Telephone side transmission line L2 telephone line L3 Detector-side transmission line

Claims

1. Emergency telephone base unit, An emergency telephone handset located in a monitoring area, the emergency telephone handset capable of communicating with the emergency telephone base unit via a telephone line, A disaster prevention receiver is connected to the sensors located in the aforementioned monitoring area via a transmission line, A display device, provided separately from the aforementioned disaster prevention receiver, displays information indicating the location of a fire on a map showing the monitoring area, based on a fire occurrence signal transmitted from the aforementioned disaster prevention receiver. Equipped with, The aforementioned display device is Symbol information corresponding to the emergency telephone unit is displayed at the location on the map corresponding to the location where the emergency telephone unit is located in the monitoring area. The handset symbol information corresponding to the emergency telephone handset making a call to the aforementioned emergency telephone base unit, Symbol information corresponding to an emergency telephone handset that has established a call with the aforementioned emergency telephone base unit and has subsequently ended the call, Symbol information corresponding to other emergency telephone handsets is displayed in a way that allows for differentiation between them. It is configured to be integrated with the aforementioned emergency telephone base unit. A disaster prevention system characterized by the following features.

2. After the fire broke out, Regarding the symbol information corresponding to the emergency telephone handset that has established a call with the aforementioned emergency telephone base unit and then ended the call, Until the fire is restored, the symbol information will be displayed in a format that is distinguishable from the symbol information corresponding to other emergency telephone units. The disaster prevention system according to claim 1, characterized in that it is as described above.

3. Emergency telephone base unit, An emergency telephone handset located in the monitoring area, the emergency telephone handset capable of communicating with the emergency telephone base unit, Information indicating the location of the fire in the event of a fire, Symbol information corresponding to the emergency telephone handset is provided at the location where the emergency telephone handset is located in the monitoring area, Display it on the map, An operation display unit that displays symbol information corresponding to the emergency telephone handset making a call in a display format that can be distinguished from symbol information corresponding to other emergency telephone handsets, A disaster prevention system equipped with, With respect to the aforementioned operation display unit, A predetermined operation for establishing a call between the emergency telephone base unit and the emergency telephone handset, When the predetermined operation is performed to select the symbol information corresponding to the emergency telephone handset that is to be used to establish a call with the emergency telephone base unit, A call is established between the emergency telephone handset and the emergency telephone base unit corresponding to the symbol information selected by the predetermined operation. Disaster prevention system.

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