Disaster prevention equipment transmission system

Abstract

To detect miswiring between transmission lines connecting multiple terminal devices and to take measures against the miswiring quickly and appropriately.SOLUTION: A plurality of operation boxes 12 is connected to transmission lines 24 -1 and 24 -2 extending from line units 26 -1 and 26 -2 of a control panel 10. The line units 26 -1 and 26 -2 transmit a call message by designating addresses of the operation boxes 12 connected to respective own lines. Each operation box 12 transmits a response message when receiving the call message of the own address. When a wiring confirmation operation is performed at the line unit 26-1, the call message is sent including a wiring confirmation code, and the operation box 12 that receives the call message sends a response message including a miswiring confirmation code. When the transmission line 24 -1 and the transmission line 24 -2 are erroneously connected via a transmission line 25, the other line unit 26 -2 that has not transmitted the call message including the wiring confirmation code also receives the response message including the wiring confirmation code, and upon detecting this, detects erroneous connection between the transmission line 24 -2 and the transmission line 24 -1, and issues an alarm.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a transmission system for disaster prevention equipment in which terminal devices are connected to multiple transmission lines drawn from a control panel, and call messages with specified addresses are sent from the control panel for each transmission line, and response messages are received from the terminal devices to perform control. [Background technology]

[0002] Conventionally, gas-based fire extinguishing equipment has been used to extinguish fires by releasing extinguishing gases such as carbon dioxide or halon gas when a fire occurs. This system enables rapid extinguishing of fires while minimizing equipment loss due to fire extinguishing in rooms where equipment that is sensitive to water damage or dirt is installed.

[0003] When this type of gas-based fire extinguishing equipment is set to automatic mode in the control panel, if a fire is alerted from each of the fire detectors connected to the two systems installed in the protected area (an AND alert from the two systems), it determines that the activation conditions for releasing gas have been met and begins a countdown of a specified time.When the countdown ends, the control panel outputs an activation signal to the activation device, which then operates by supplying a release gas such as carbon dioxide from the activation device to a selection valve installed in the gas supply piping corresponding to the protected area and opening it, and also opening the plug of the extinguishing gas storage container, releasing the extinguishing gas from the injection head.

[0004] In addition, if the control panel is set to manual mode, when a supervisor discovers a fire either visually or through the activation of a fire detector, and opens the door of the operation box installed in the protected area and presses the start switch, the control panel will determine that the conditions for starting the gas release have been met and begin a countdown, and when the countdown ends, it will release the extinguishing gas in the same manner.

[0005] FIG. 10 is an explanatory diagram showing a transmission system of a conventional gas-based fire extinguishing equipment, in which a control panel 100 is provided with line units 106 (106-1), 106 (106-2) and a common unit 108, and, for example, four operation boxes 102 with addresses A1 to A4 set are connected to transmission paths 104 (104-1), 104 (104-2) drawn from the line units 106 (106-1), 106 (106-2).

[0006] The line units 106 (106-1), 106 (106-2) sequentially designate the addresses A1 to A4 of the operation boxes 102 connected to their own transmission paths 104 (104-1), 104 (104-2) to transmit call messages, and the operation boxes 102 transmit response messages when they receive a call message designating their own address. By transmitting and receiving such call messages and response messages, control signals and display signals required for gas extinguishing control are transmitted and received by serial transmission between the control panel 10 and the operation boxes 102. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 6-062432 [Patent Document 2] Japanese Patent Application Publication No. 11-245809 Summary of the Invention [Problem to be solved by the invention]

[0008] In such conventional gas fire extinguishing equipment, when wiring work is performed to connect the operation boxes 102 assigned to the line units 106 (106-1), 106 (106-2) to the respective transmission paths 104 (104-1), 104 (104-2), it is anticipated that the transmission paths 104 (104-1), 104 (104-2) may be mistakenly connected together, as shown in transmission path 105.

[0009] In this manner, when the transmission paths 104 (104-1) and 104 (104-2) are erroneously connected via the transmission path 105, the line units 106 (106-1) and 106 (106-2) start up simultaneously when the control board 100 is powered on, and transmit call messages sequentially specifying the addresses A1 to A4 at the same time to the transmission paths 106 (106-1) and 106 (106-2).

[0010] Here, the transmission paths 104 (104-1) and 104 (104-2) are misconnected by the transmission path 105, and the length of the transmission path is not long enough to cause a transmission delay. 102 The line units 106 (106-1) and 106 (106-2) simultaneously receive confirmation messages and transmit response messages, and thus, even if the transmission paths 104 (104-1) and 104 (104-2) are misconnected by the transmission path 105, the call messages and response messages are normally transmitted and received.

[0011] However, for example, when a start switch is operated on the operation box 102 connected to the transmission line 104 (104-1), a response message including switch start information is received by both line units 106 (106-1) and 106 (106-2) due to a misconnection of the transmission line, which may cause the line unit 106 (106-2) to perform erroneous control. Therefore, it is necessary to detect and deal with any misconnection of the transmission line at an early stage after starting operation of the equipment.

[0012] The present invention aims to provide a transmission system for disaster prevention equipment that detects and alerts incorrect wiring between different transmission lines pulled out from a control panel and connected to multiple terminal devices, thereby enabling quick and appropriate response to incorrect wiring. [Means for solving the problem]

[0013] (First transmission system for disaster prevention equipment) The present invention relates to a transmission system for disaster prevention equipment, in which a plurality of terminal devices, each assigned to a line unit, are connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmit call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive a call message specifying their own address, The line unit that has received the predetermined wiring check request transmits a call message including the predetermined wiring check information, When the terminal device receives a call message including wiring confirmation information with its own address specified, the terminal device transmits a response message including the wiring confirmation information; The other circuit units that have not accepted the wiring confirmation request detect an incorrect connection between their own transmission line and the transmission line of the other circuit units and issue an alarm when they receive a response message including wiring confirmation information.

[0014] (Second transmission system for disaster prevention equipment) In another aspect of the present invention, a transmission system for disaster prevention equipment includes a plurality of terminal devices each assigned to a line unit, connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmitting call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmitting response messages when receiving a call message specifying their own address, The line unit that receives the predetermined wiring check request will request The device is characterized in that it stops sending call messages until the call message is released, and if a response message is received while the call message transmission is stopped, it detects an erroneous connection between its own transmission line and the transmission line of another line unit and issues an alarm.

[0015] (Third transmission system for disaster prevention equipment) In another aspect of the present invention, a transmission system for disaster prevention equipment includes a plurality of terminal devices each assigned to a line unit, connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmitting call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmitting response messages when receiving a call message specifying their own address, The multiple line units stop sending call messages during a randomly set wiring check time, and when a response message is received while the call messages are stopped, they detect an incorrect connection between their own transmission line and the transmission line of another line unit and issue an alarm.

[0016] (Fourth transmission system for disaster prevention equipment) In another aspect of the present invention, a transmission system for disaster prevention equipment includes a plurality of terminal devices each assigned to a line unit, connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmitting call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmitting response messages when receiving a call message specifying their own address, The line unit that has received the predetermined wiring confirmation request transmits the predetermined wiring confirmation message together with the request, The other line units which have not accepted the wiring check request detect an erroneous connection between their own transmission line and the transmission line of the other line unit and issue an alarm when they receive the wiring check message.

[0017] (Gas-based fire extinguishing equipment) The disaster prevention equipment is a gas-based fire extinguishing system, and a plurality of operation boxes are connected as a plurality of terminal devices to transmission lines drawn from a plurality of line units. Effect of the Invention

[0018] (Effect of the first transmission system of disaster prevention equipment) The present invention relates to a transmission system for disaster prevention equipment in which a plurality of terminal devices, each assigned to a line unit, are connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmit call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive a call message specifying their own address. The line unit that receives a specific wiring check request transmits a call message including specific wiring check information, and the terminal devices transmit a response message including the wiring check information when they receive a call message including the wiring check information specifying their own address. When the other line unit that has not received the wiring check information receives a response message including wiring check information, it detects and warns of a misconnection between its own transmission line and the transmission line of the other line unit. Therefore, for example, if there is a misconnection between the transmission lines drawn from two line units, when a wiring check operation is performed at the start of operation of the transmission system and a call message including wiring check information is sent from one of the line units, an abnormality occurs in which a response message including wiring check information is received by the other line unit that did not send the call message including wiring check information, and by detecting this and issuing an alarm, it is possible to know and deal with the miswiring of the transmission line, and this ensures that To To solve the problem of incorrect wiring of transmission lines.

[0019] (Effect of the second transmission system for disaster prevention equipment) In another aspect of the present invention, in a transmission system for disaster prevention equipment, a plurality of terminal devices each assigned to a line unit are connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmit call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive a call message specifying their own address, the line unit that has received a predetermined wiring check request waits a predetermined time or requestThe transmission of the call message is stopped until the call message is released, and if a response message is received while the call message is stopped, a misconnection between its own transmission line and the transmission line of another circuit unit is detected and an alarm is issued. For example, if there is a misconnection between the transmission lines drawn from two circuit units, when a wiring check operation is performed at the stage of starting the operation of the transmission system and the transmission of the call message from one circuit unit is stopped, an abnormality occurs in which a response message from a terminal device that has received a call message from the other circuit unit is received by the circuit unit that has stopped sending the call message. By detecting this and issuing an alarm, it is possible to know and deal with the miswiring of the transmission line, and it is possible to reliably To To solve the problem of incorrect wiring of transmission lines.

[0020] (Effects of the third transmission system for disaster prevention equipment) In another aspect of the present invention, in a transmission system for disaster prevention equipment, a plurality of terminal devices assigned to each line unit are connected to transmission paths drawn from a plurality of line units provided in a control panel, the line units transmit call messages by designating the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive a call message with their own address designated, the plurality of line units stop transmitting call messages for a wiring check time that is set at random, and if a response message is received during the suspension of call messages, a misconnection between their own transmission path and the transmission path of another line unit is detected and an alarm is issued. Therefore, during operation of the system, transmission of call messages by any line unit is temporarily stopped at random timing, and normally no response message is received from the terminal devices during the transmission suspension time, but if there is miswiring, an abnormality occurs in which a response message is received from the terminal device, and by detecting this and issuing an alarm, the miswiring of the transmission path can be known and dealt with, and the system is reliable. To To solve the problem of incorrect wiring of transmission lines.

[0021] (Effects of the fourth transmission system for disaster prevention equipment) In another aspect of the present invention, in a transmission system for disaster prevention equipment, a plurality of terminal devices assigned to each line unit are connected to transmission paths drawn from a plurality of line units provided in a control panel, the line units specify the addresses of the plurality of terminal devices connected to their own lines and transmit call messages, and the terminal devices transmit response messages when they receive a call message specifying their own address, a line unit that receives a predetermined wiring check request transmits the predetermined wiring check message as well, and another line unit that does not receive a wiring check request detects an erroneous connection between its own transmission path and the transmission path of another line unit and issues an alarm when it receives the wiring check message. Therefore, for example, in the case where there is an erroneous connection between transmission paths drawn from two line units, when a wiring check operation is performed at the start of operation of the transmission system and a line check message is sent from one line unit, an abnormality occurs in which the other line unit that did not send the line check message receives the wiring check message, and this is detected and an alarm is issued, so that the erroneous wiring of the transmission path can be known and dealt with, and it is reliable. To To solve the problem of incorrect wiring of transmission lines. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is an explanatory diagram showing the overall configuration of a gas-based fire extinguishing system as an example of disaster prevention equipment in which the transmission system of the present invention is used. [Diagram 2] 1 is a block diagram showing an overview of a transmission system installed in a gas-based fire extinguishing system. [Diagram 3] 1 is a block diagram showing the functional configuration of a transmission system that transmits and receives messages between a line unit and an operation box. [Figure 4] 1 is an explanatory diagram showing the formats of a call message and a response message used in a transmission system. [Diagram 5] 4 is a time chart showing message transmission for detecting faulty wiring according to the first embodiment of the transmission system. [Figure 6] 4 is a flowchart showing a communication operation of a line unit in the first embodiment of the transmission system. [Figure 7]10 is a time chart showing message transmission for detecting faulty wiring according to a second embodiment of the transmission system. [Figure 8] 10 is a flowchart showing a communication operation of a line unit in a second embodiment of the transmission system. [Figure 9] 4 is a time chart showing message transmission for detecting faulty wiring according to the first embodiment of the transmission system. [Figure 10] FIG. 1 is a block diagram illustrating a problem of incorrect wiring in a conventional transmission system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a transmission system for disaster prevention equipment according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiment.

[0024] [Basic Concept of the Implementation Mode] First, a basic concept of the embodiment will be described. The embodiment generally relates to a transmission system for disaster prevention equipment.

[0025] Here, "disaster prevention equipment" refers to equipment that uses disaster prevention devices to protect people and objects from fires and other disasters, and one example includes gas-based fire extinguishing equipment that releases fire extinguishing gases such as carbon dioxide and nitrogen in the event of a fire to extinguish the fire.

[0026] In addition, a "gas-based fire extinguishing system" is a system in which, when the operation of the start switch on the operation box is detected by the control unit of the control panel, electricity is applied to the solenoid of the starting device to release fire extinguishing gas into the protected area, and is a concept that includes nitrogen fire extinguishing systems, carbon dioxide fire extinguishing systems, etc.

[0027] The "operation box" is installed on the outer wall of the protected area, and operates the start switch inside by opening the door and sending a start signal to the control panel to release the extinguishing gas into the protected area. The "starting device" is a device that opens the solenoid by the start signal from the control panel to release the release gas, and opens the selection valve and container valve to supply the extinguishing gas filled in the container to the injection head and release it into the protected area.

[0028] A "disaster prevention equipment transmission system" is a system in which multiple terminal devices assigned to each line unit, such as the operation box of a gas-based fire extinguishing equipment, are connected to transmission paths pulled out from multiple line units installed in a control panel, and the line units sequentially specify the addresses of the multiple terminal devices connected to their own lines and send call messages, and when the terminal devices receive a call message specifying their own address, they send a response message.

[0029] The disaster prevention equipment transmission system of this embodiment is designed to detect and issue an alarm on incorrect wiring between different transmission paths that are pulled out from a control panel and connected to multiple terminal devices, and is composed of the following first to third transmission systems.

[0030] 「 The "first transmission system for disaster prevention equipment" refers to a system in which a line unit that detects a specified wiring confirmation operation transmits a call message including specified wiring confirmation information, and when a terminal device receives the call message including wiring confirmation information with its own address specified, it transmits a response message including the wiring confirmation information, and when another line unit that has not detected the wiring confirmation operation receives a response message including the wiring confirmation information, it detects an incorrect connection between its own transmission line and the transmission line of another line unit and issues an alarm, and corresponds to the first embodiment of the transmission system in the specific contents of the embodiment.

[0031] In addition, the "second transmission system of disaster prevention equipment" refers to a line unit that detects a predetermined wiring check operation and transmits the same to the line unit for a predetermined period of time or after the wiring check operation. requestThe transmission of the call message is stopped until the call message is released, and if a response message is received during the suspension of the call message, an erroneous connection between its own transmission line and the transmission line of another line unit is detected and an alarm is issued, which corresponds to the second embodiment of the transmission system in the specific contents of the embodiment.

[0032] In addition, the "third transmission system for disaster prevention equipment" is a system in which multiple line units stop sending call messages for a randomly set wiring confirmation time, and when a response message is received during the suspension of the call messages, detects an incorrect connection between its own transmission line and the transmission line of another line unit and issues an alarm, and corresponds to the third embodiment of the transmission system in the specific contents of the embodiment.

[0033] In the following, a specific embodiment will be described. In the following specific embodiment, the "disaster prevention equipment" is a "gas-based fire extinguishing equipment" and the "terminal device" is a "control box for the gas-based fire extinguishing equipment".

[0034] [Specific details of the embodiment] Next, the specific contents of the embodiment will be described in more detail. The contents will be described in the following sections. a. Gas-based fire extinguishing equipment b. Transmission system c. Line unit and operation box c1. Circuit unit c2.Operation box d. First embodiment of a transmission system that detects and issues an alarm for faulty wiring d1. Control section of line unit d2. Miswiring detection operation d3. Communication operation of circuit unit to detect incorrect wiring e. Second embodiment of a transmission system that detects and issues an alarm for faulty wiring e1. Control section of line unit e2. Miswiring detection operation e3. Communication operation of circuit unit to detect incorrect wiring f. Third embodiment of a transmission system for detecting and issuing an alarm regarding faulty wiring f1. Control section of line unit f2. Miswiring detection operation g. Modifications of the present invention

[0035] [a. Gas-based fire extinguishing equipment] The gas-based fire extinguishing equipment to which the transmission system of the present embodiment is applied will be described in more detail. Figure 1 is an explanatory diagram showing the overall configuration of a gas-based fire extinguishing equipment as an example of a disaster prevention equipment to which the transmission system of the present invention is applied. Note that the equipment configuration in Figure 1 is only an example, and any appropriate configuration can be adopted as necessary.

[0036] As shown in Figure 1, the gas-based fire extinguishing system is equipped with a control panel 10 that controls the gas-based fire extinguishing system as a whole, and an operation box 12 is installed outside each room that serves as protection zones A and B. A line unit is provided in the control panel 10 for each of the protection zones A and B, and the operation box 12 installed for each of the protection zones A and B is connected to the transmission line drawn from each line unit to perform serial transmission.

[0037] The operation box 12 is equipped with a start switch and a door to protect the start switch, and when the manual mode is set, if a person discovers a fire, they open the door and operate the start switch to send a start signal to the control panel 10, which releases extinguishing gas as a fire extinguishing agent. The release indicator light 15 indicates that extinguishing gas is being released within the monitored area, and warns people not to enter the room.

[0038] The injection head 14 releases the extinguishing gas into the room. The speaker 13 broadcasts a warning message indicating that the extinguishing gas is being released and an evacuation warning message, and urges people in the danger zone to evacuate immediately. The extinguishing gas storage vessel 16 stores the extinguishing gas.

[0039] In this embodiment, there is only one fire assumed for each of the multiple protected compartments A and B, and therefore the extinguishing gas storage container 16 is provided as a common facility for the multiple protected compartments A and B, and is filled with the amount of extinguishing gas required to extinguish a fire in one protected compartment.

[0040] The starting devices 18 are provided corresponding to the protected compartments A and B, and upon receiving a start signal for releasing the extinguishing gas from the control panel 10, open their built-in solenoids by energizing them to release release gas such as carbon dioxide, which in turn opens the selection valve 17 and opens the plug of the extinguishing gas storage container 16. The selection valve 17 opens upon receiving the release gas activated by the starting device 18, and supplies and sprays the extinguishing gas to the injection head 14 of the protected compartment A or B where the fire has occurred.

[0041] The fire detector 11 monitors fires in the protected areas A and B through two detector circuits. The pressure switch 21 is gas It detects the release of extinguishing gas from the storage container 16, sends a detection signal to the control panel 10, and flashes the release indicator light 15 corresponding to the monitored area where the fire has occurred. When the extinguishing gas is released into the room, the piston releaser 19 closes the smoke exhaust port with a damper to prevent the extinguishing gas from leaking outside. The shut-off valve 23 can be manually operated to close the supply of extinguishing gas from the extinguishing gas storage container 16.

[0042] In such a gas-based fire extinguishing system, if the control panel 10 is set to automatic mode, when a fire alarm is generated from each of the fire detectors 11 connected to the two systems (AND alarm from the two systems), it determines that the conditions for starting the gas release have been met and acquires the right to start the release. It then begins a countdown for a specified time and broadcasts a caution warning and evacuation warning from the speaker 13 to indicate that the fire extinguishing gas will be released.

[0043] The control panel 10 and the operation box 12 are provided with a two-digit seven-segment display which normally displays a predetermined number of seconds as the initial countdown value. When the countdown begins, the remaining seconds are displayed in sequence, and when the countdown ends, zero seconds is displayed.

[0044] When the countdown of the control panel 10 ends, the control panel 10 outputs a gas release signal to the starting device 18, which then supplies a release gas such as carbon dioxide to the selection valve 17 to open it, and also opens the plug of the extinguishing gas storage container 16, causing the extinguishing gas to be released from the injection head 14 via the gas supply piping into the room of the protected compartment where a fire has been detected.

[0045] When extinguishing gas is released in automatic mode, the seven-segment display on the control panel 10 displays the detector number "FF" as the activation history of the activated fire detector 11. Here, the detector number F has values ​​from 1 to 8, and unique detector numbers are assigned in advance to the eight fire detectors 11 installed in the two protected areas.

[0046] Furthermore, if the manual mode is set in the control panel 10, when a monitor discovers a fire, for example in protected area A, by visual inspection or by the activation of the fire detector 11, he opens the door of the operation box 12 installed outside protected area A and presses the start switch, which sends a start signal to the control panel 10. Upon receiving the start signal, the control panel 10 determines that the start conditions for gas release have been met and acquires the start right and the right to sound the speaker, and begins a countdown, while the speaker 13 broadcasts a caution alarm and an evacuation alarm indicating that extinguishing gas will be released. When the countdown ends, extinguishing gas is released from the injection head 14 of the protected area in the same manner as in the automatic mode.

[0047] [b. Transmission System] The transmission system of the gas-based fire extinguishing equipment will be explained in more detail. Figure 2 is a block diagram showing an outline of the transmission system installed in the gas-based fire extinguishing equipment. As shown in Figure 2, the control panel 10 is provided with circuit units 26 (26-1) and 26 (26-2) corresponding to, for example, two protected compartments, and two systems of fire detectors 11, operation boxes 12, speakers 13, and starting devices 18 are connected to the circuit units 26 (26-1) and 26 (26-2) by signal lines.

[0048] Four operation boxes 12 provided in each protected area are connected to the transmission paths 24 (24-1), 24 (24-2) drawn from the line units 26 (26-1), 26 (26-2). Addresses A1 to A4 are preset in the four operation boxes 12 for each of the transmission paths 24 (24-1), 24 (24-2). In the following explanation, when it is not necessary to distinguish between the line units 26 (26-1), 26 (26-2) and the transmission paths 24 (24-1), 24 (24-2), they may be referred to as the line units 26 and the transmission paths 24.

[0049] Furthermore, the serial transmission lines 24 (24-1), 24 (24-2) drawn from the line units 26 (26-1), 26 (26-2) may be miswired by a transmission line 25 shown by an imaginary line due to a mistake in on-site wiring work during construction.

[0050] The line units 26 (26-1) and 26 (26-2) are provided with a common section 28 including an operation section 30, a display section 32, a reporting section 34, and a speaker driving section 36, which are mutually connected by signal lines.

[0051] Operation section 30 is equipped with a key switch that switches the operating mode in all protected areas between automatic mode and manual mode, an emergency stop switch that stops gas release during the countdown, an alarm stop switch that stops the alarm, a report transfer stop switch that stops report transfer, etc., and signal lines are connected so that the operation signals from each switch are output in parallel to line units 26 (26-1) and 26 (26-2).

[0052] The display unit 32 is provided with a power light indicating the power status, a fire light indicating a fire, a manual mode indicator light indicating that the manual mode is set, an automatic mode indicator light indicating that the automatic mode is set, a release start light indicating that the gas release operation is started, a release light indicating that gas has been released, a 7-segment display used for countdown, and the like, and is connected by signal lines so that the display is driven by the OR input of each display signal from the line units 26 (26-1) and 26 (26-2).

[0053] The signal transmission unit 34 is provided with a non-voltage contact circuit that outputs signal transmission signals such as automatic mode, manual mode, fire, startup, gas release, etc., and is connected by signal lines so that each signal transmission signal is output from the line units 26 (26-1), 26 (26-2) by OR input.

[0054] The speaker driving unit 36 ​​is provided with a sound source and a power amplifier for an alarm broadcast for releasing fire extinguishing gas, and is connected by a signal line so that the broadcast signal is input in parallel to the line units 26 (26-1) and 26 (26-2).

[0055] [c. Line unit and operation box] The line units and operation boxes will be explained in more detail below. Figure 3 is a block diagram showing the functional configuration of a transmission system that transmits and receives messages between the line units and operation boxes, and shows one line unit and the facility equipment including the operation box connected to it.

[0056] (c1. Line unit) As shown in Figure 3, the line unit 26 is equipped with a control unit 38, and is provided with a transmission unit 40, two fire receiving units 42, a drive unit 44, and a speaker selection unit 46 to connect the equipment on the protected area side to the control unit 38 via signal lines.

[0057] 2 is input and connected to the speaker selection unit 46, and the switch means of the speaker selection unit 46 is turned on to supply the broadcast signal to the speaker 13. The speaker selection units 46 are provided in numbers corresponding to the two protected sections.

[0058] 2. The control unit 38 is connected to the operation unit 30, the display unit 32, and the reporting unit 34 which constitute the common unit 28 of the control panel 10 shown in FIG.

[0059] The control unit 38 is a function realized by executing a program, and a computer circuit equipped with a CPU, memory, various input / output ports, etc. is used as the hardware. The control unit 38 controls the transmission unit 40 to transmit a call message (downstream message) sequentially specifying the addresses A1 to A4 of the operation box 12 at every predetermined call cycle. 12 The control unit 38 also acquires data such as switch operation information (on / off information) contained in a response message (upstream message) received from the operation box 12 via the transmission unit 40, and performs control and display required for gas release.

[0060] The transmission unit 40 transmits and receives various telegrams to and from the operation box 12 via the transmission path 24 by serial transmission.

[0061] (c2.Operation box) The operation box 12 will be described in more detail. As shown in Fig. 3, the operation box 12 includes a control unit 48, to which a transmission unit 50, an operation unit 52, a detection unit 54, a display unit 56, and a 7-segment display 58 are provided.

[0062] The control unit 48 has functions realized by executing a program, and uses as its hardware a computer circuit equipped with a CPU, memory, various input / output ports, and the like.

[0063] The transmission section 50 transmits and receives various telegram signals to and from the transmission section 40 of the line unit 26 via the transmission path 24 by serial transmission.

[0064] The operation unit 52 is provided with an emergency stop switch, a key switch, a lamp test switch, a start switch, etc. The detection unit 54 is provided with a door open detection switch. Furthermore, the display unit 56 is provided with a fire light, a discharge start light, a power light, a shutoff valve closed indicator light, a manual mode indicator light, an automatic mode indicator light, etc.

[0065] When the control unit 48 receives a serial transmission signal that is a call message (downstream message) including a command specifying the operation box address and various display information from the line unit 26 via the transmission path 24, it controls the display unit 48 to light up the corresponding indicator light on the display unit 56 and drive the 7-segment display 58 to display.

[0066] In addition, when the control unit 48 receives a call message, it generates a serial transmission signal as a response message (upstream message) and controls the transmission to the line unit 26. This response message includes data such as switch operation information (on / off information) of the operation unit 48 or the detection unit 54.

[0067] Power is supplied from the line unit 26 to the operation box 12 via a power line, and a telephone line allows for a call connection, but these are not shown in the figure.

[0068] Figure 4 is an explanatory diagram showing the formats of a call message and a response message used in a transmission system. A call message 60 shown in Figure 4(A) is a 4-byte message consisting of a command, an address, data, and a checksum. A response message 62 shown in Figure 4(B) is a 2-byte message consisting of data and a checksum. The formats of the call message and the response message can be any appropriate format as required.

[0069] [d. First embodiment of a transmission system that detects and issues an alarm for faulty wiring] A more detailed description will now be given of the first embodiment of the transmission system for detecting and warning about faulty wiring. Fig. 5 is a time chart showing message transmission for detecting faulty wiring according to the first embodiment of the transmission system.

[0070] (d1. Control section of line unit) The control unit of the line unit will be described in more detail. In order to detect and warn of erroneous wiring in the connection between the transmission paths 24 (24-1) and 24 (24-2) shown in Fig. 2 by the transmission path 25, the control unit 38 according to the first embodiment of the line unit 26 shown in Fig. 3 sets the wiring check mode and performs control to include a predetermined wiring check code (wiring check information) in the call message and transmit it when it detects a wiring check operation by a wiring check switch provided on a circuit board or the like on which the line unit 26 is mounted.

[0071] Correspondingly, when the control unit 48 of the operation box 12 shown in FIG. 3 receives a call message including a wiring confirmation code specifying its own address, it creates a response message including the received wiring confirmation code and instructs the transmission unit 50 to transmit it.

[0072] Furthermore, when the control unit 38 of the line unit 26 receives a response message including a wiring confirmation code in a state in which the wiring confirmation mode is not set by the wiring confirmation operation of the wiring confirmation switch, the control unit 38 detects an erroneous connection between its own transmission path 24 and the transmission path of another line unit and issues an alarm.

[0073] (d2. Miswiring detection operation) The operation of detecting the faulty wiring will be described in more detail. As shown in Fig. 5, the line units 26 (26-1) and 26 (26-2) start up at the same time when the control panel 10 is powered on, and since they have the same function and configuration, they transmit the 4-byte call message shown in Fig. 4(A) to the transmission lines 24 (24-1) and 24 (24-2) in parallel at the same timing by sequentially specifying the addresses A1 to A4 of the operation box 12. This call message is received by the operation box 12 with the same address connected to the transmission lines 24 (24-1) and 24 (24-2), and the 2-byte response message shown in Fig. 4(B) is transmitted in parallel at the same timing. In the call message in Fig. 5, the command is indicated by C, and the addresses are indicated by A1 to A4.

[0074] Here, as shown in FIG. 2, if the transmission paths 24 (24-1), 24 (24-2) are miswired by the transmission path 25, the call messages from the line units 26 (26-1), 26 (26-2) will be transmitted to the same transmission path, but the transmission timing will be perfectly aligned, and no destruction of bit data will occur due to a signal collision. The call messages will be received normally by the two operation boxes 12 with the same address connected to the line units 26 (26-1), 26 (26-2), and the two operation boxes 12 with the same address will transmit response messages at the same timing, which will be received by the line units 26 (26-1), 26 (26-2). Even if there is a miswire, it may be possible that a normal communication state is maintained in appearance.

[0075] Here, after turning on the power to the control panel 10 and starting up the transmission system, if the wiring confirmation switch of the line unit 26 (26-1) is turned on at time t1 as shown in FIG. 5, the line unit 26 (26-1) sets a predetermined wiring confirmation code 64 in the data of the call message of address A1 and transmits it.

[0076] The call message including the wiring confirmation code 64 transmitted by the line unit 26 (26-1) is received by the two operation boxes 12 having the same address A1 connected to the transmission paths 24 (24-1), 24 (24-2), which transmit a response message including the wiring confirmation code 64. This response message including the wiring confirmation code 64 is received by each of the line units 26 (26-1), 26 (26-2).

[0077] However, the line unit 26 (26-2) has not sent a call message including the wiring confirmation code 64, and should not receive a response message including the wiring confirmation code 64. However, receiving such a message means that there is a wiring error in the transmission path 24 (24-2). At time t2 when the response message including the wiring confirmation code 64 is received, the line unit 26 (26-2) sets a signal indicating the detection of a wiring error to an H level, and based on this, outputs an alarm indicating the wiring error.

[0078] Incidentally, the reliability of the detection of a wiring error may be increased by detecting the wiring error when a response message including a wiring confirmation code is received a predetermined number of times in succession.

[0079] (d3. Communication operation of circuit unit to detect wiring errors) The communication operation of the circuit unit that detects faulty wiring will now be described in more detail. Figure 6 is a flow chart showing the control operation of the line unit in the first embodiment of the transmission system, which is the control operation by the control unit 38 of the line unit 26 shown in Figure 3. The address of the operation box 12 connected to the transmission path from the line unit 26 is A=1, 2, 3...Amax.

[0080] As shown in FIG. 6, the control unit 38 of the line unit 26 initializes the destination address A to A=1 in step S1, then determines whether or not it is in the wiring check mode in step S2, and since it is not in the wiring check mode under normal circumstances, it proceeds to step S3, generates a call message with address A set to 1, and transmits the call message in step S5.

[0081] Next, when it is determined in step S6 that a response message has been received from the operation box 12, it is determined in step S7 whether or not it contains a wiring confirmation code, and in this case, since it does not contain a wiring confirmation code, the process proceeds to step S9, where information contained in the response message data is extracted and the corresponding control or display is performed. Also, if it is not determined in step S6 that a response message has been received, the process proceeds to step S11, where it is recognized that there is no operation box with the address set in the call message.

[0082] Next, in step S12, it is determined whether the maximum address Amax has been reached, and in this case, since the maximum address Amax has not been reached, in step S13, the address A is incremented by 1, and the process returns to step S2 and repeats the same operation. If it is determined in step S12 that the maximum address Amax has been reached, the process returns to step S1, address A is initialized to A=1, and the process from step S2 is repeated.

[0083] Furthermore, if the wiring check mode is set by operating the wiring check switch provided on the operation unit 30, the wiring check mode is determined in step S2, the process proceeds to step S4, a call message with a wiring check code set is generated, and this call message is transmitted in step S5.

[0084] Next, if it is determined in step S6 that a confirmation response message has been received, the process proceeds to step S7, in which case the response message contains a wiring confirmation code, and the process proceeds to step S8. In step S8, it is determined whether the device is in wiring confirmation mode, and since the device is in wiring confirmation mode in this case, the process proceeds to step S10, and if the response message contains data other than the wiring confirmation code, that information is extracted and the corresponding control or display is performed.

[0085] On the other hand, in the control operation of another line unit that has not operated the wiring check switch, it is determined in step S6 that a confirmation response message has been received, and in step S7 it is determined that the response message contains a wiring check code, and the process proceeds to step S8, where it is determined that the unit is not in the wiring check mode and the process proceeds to step S10, where incorrect wiring is detected and an alarm is output.

[0086] In this way, for example, when a wiring confirmation operation is performed on line unit 26-1 and a call message including a wiring confirmation code is transmitted, if a response message including the wiring confirmation code is received by the other line unit 26-2, which has not transmitted a call message including the wiring confirmation code, this is detected and an alarm is issued, making it possible to know and take action regarding the incorrect wiring in which transmission paths 24-1 and 24-2 are connected by transmission path 25.

[0087] [e. Second embodiment of a transmission system that detects and issues an alarm for faulty wiring] A second embodiment of the transmission system for detecting and warning a wiring error will now be described in more detail. Fig. 7 is a time chart showing the transmission of a message for detecting a wiring error according to the second embodiment of the transmission system.

[0088] (e1. Line unit control section) The control unit of the line unit will be described in more detail. In order to detect and warn of erroneous wiring in the transmission paths 24 (24-1) and 24 (24-2) shown in Fig. 2 connected by the transmission path 25, the control unit 38 according to the second embodiment of the line unit 26 shown in Fig. 3 sets a call stop mode when it detects an ON operation of a wiring check switch provided on a circuit board or the like on which the line unit 26 is mounted, and performs control to stop transmission of a call message until the wiring check switch is turned off or for a predetermined time.

[0089] In response to this, the control unit 38 of the line unit 26 performs control to detect and issue an alarm when a response message is received while the call message is stopped, and detects an erroneous connection between its own transmission path 26 and the transmission path of another line unit.

[0090] (e2. Miswiring detection operation) The operation of detecting miswiring will be described in more detail. Now, assume that the transmission paths 24-1, 24-2 are miswired by the transmission path 25, as shown in Fig. 2. In this state, if the control panel 10 is powered on to start up the transmission system, and then the wiring check switch of the line unit 26 (26-1) is turned on at time t1, as shown in Fig. 7, the line unit 26 (26-1) stops sending call messages while the wiring check switch is on. In contrast, the line unit 26 (26-2) continues to send call messages normally, since the wiring check switch has not been turned on.

[0091] For this reason, the line unit 26 (26-1) that has stopped transmitting would not normally receive a response message, but due to incorrect wiring in the transmission line, it receives a response message from the operation box 12 in response to a call message sent by another line unit 26 (26-2). This means that there is incorrect wiring in which the transmission line 24 (24-1) is connected to another transmission line, and at time t2 when the first response message is received after the transmission of the call message has been stopped, a signal indicating incorrect wiring detection is set to H level, and based on this, an alarm indicating incorrect wiring is output.

[0092] Incidentally, the reliability of the detection of a wiring error may be increased by detecting the wiring error when a response message is received a predetermined number of times in succession while a call is stopped.

[0093] (e3. Communication operation of circuit unit to detect wiring errors) The communication operation of the circuit unit that detects faulty wiring will now be described in more detail. Figure 8 is a flow chart showing the control operation of the line unit in the second embodiment of the transmission system, which is the control operation by the control unit 38 of the line unit 26 shown in Figure 3. Also, the address of the operation box 12 connected to the transmission path from the line unit 26 is A=1, 2, 3...Amax.

[0094] As shown in FIG. 8, the control unit 38 of the line unit 26 initializes the destination address A to A=1 in step S21, and then determines in step S22 whether or not the line is in the call stop mode due to the wiring check switch being turned on. Since the line is not in the call stop mode under normal circumstances, the process proceeds to step S23, where a call message is generated with address A set to 1, and the call message is transmitted in step S24.

[0095] Next, if it is determined in step S25 that a response message has been received from the operation box 12, it is determined in step S26 whether or not the system is in the call stop mode, and since it is not in the call stop mode in this case, the process proceeds to step S27, where information contained in the response message data is extracted and the corresponding control or display is performed. Also, if it is not determined in step S25 that a response message has been received, the process proceeds to step S29, where it is recognized that there is no operation box with the address set in the call message.

[0096] Next, in step S30, it is determined whether the maximum address Amax has been reached, and in this case, since the maximum address Amax has not been reached, in step S31, the address A is incremented by 1, and the process returns to step S22 and repeats the same operation. If it is determined in step S30 that the maximum address Amax has been reached, the process returns to step S21, address A is initialized to A=1, and the process from step S22 is repeated.

[0097] In addition, if the call stop mode has been set by turning on the call stop switch, the call stop mode is determined in step S22, and by skipping steps S23 and S24, the process proceeds to step S25 without sending a call message, and it is determined whether or not a response message has been received.

[0098] In this case, because the line unit 26 has stopped sending call messages, it has received a response message due to incorrect wiring, even though no response message has been received from the operation box 12. For this reason, the line unit 26 determines in step S25 that a response message has been received and proceeds to step S26, determines in step S26 that it is in the call stop mode and proceeds to step S28, detects the incorrect wiring, and outputs an alarm.

[0099] In this way, for example, when a call stop operation is performed on line unit 26 (26-1) to stop sending a call message, a response message from the operation box in response to the call message from the other line unit 26 (26-2) which has not stopped sending call messages is received, and this abnormality is detected and an alarm is issued, making it possible to know about the incorrect wiring connecting transmission paths 24 (24-1) and 24 (24-2) via transmission path 25 and take appropriate action.

[0100] [f. Third embodiment of a transmission system that detects and issues an alarm for faulty wiring] A third embodiment of the transmission system for detecting and warning a wiring error will now be described in more detail. Fig. 9 is a time chart showing the transmission of a message for detecting a wiring error according to the third embodiment of the transmission system.

[0101] (f1. Control section of line unit) The control unit of the line unit will be described in more detail. In order to detect and warn of a faulty wiring in which the transmission lines 24 (24-1) and 24 (24-2) shown in Fig. 2 are connected by the transmission line 25, the control unit 38 according to the third embodiment of the line unit 26 shown in Fig. 3 stops sending call messages for a randomly set wiring check time, and when a response message is received during the suspension of the call messages, detects and warns of a faulty connection between its own transmission line and the transmission line of another line unit.

[0102] (f2. Miswiring detection operation) The operation of detecting miswiring will be described in more detail. Assume now that the transmission paths 24 (24-1) and 24 (24-2) are miswired by the transmission path 25, as shown in Fig. 2. In this state, when the power to the control panel 10 is turned on to start up the transmission system, as shown in Fig. 9, the line units 26 (26-1) and 26 (26-2) are set to a transmission stop mode in which they stop transmission for a certain period of time Ts at different randomly set times t1 and t3.

[0103] When the line unit 26 (26-1) stops sending a call message for a certain period of time Ts at the randomly set time t1 in this manner, the line unit 26 (26-1) that has stopped sending would not normally receive a response message, but due to incorrect wiring in the transmission line, it receives a response message from the operation box 12 in response to the call message sent by another line unit 26 (26-2). This means that there is incorrect wiring in which the transmission line 24 (24-1) is connected to another transmission line, and at time t2 when the first response message is received after the transmission of the call messages has been stopped, a signal indicating incorrect wiring detection is set to H level, and based on this, an alarm indicating incorrect wiring is output.

[0104] In addition, when the line unit 26 (26-2) stops sending call messages for a certain period of time Ts at a randomly set time t3, the line unit 26 (26-2) that has stopped sending would not normally receive a response message, but due to incorrect wiring in the transmission line, it receives a response message from the operation box 12 in response to the call message sent by another line unit 26 (26-1). This means that there is incorrect wiring in which the transmission line 24 (24-2) is connected to another transmission line, and at time t4 when the first response message is received after the transmission of the call messages has stopped, a signal indicating the detection of incorrect wiring is made to be at H level, and based on this, an alarm indicating the incorrect wiring is output, making it possible to appropriately deal with the incorrect wiring.

[0105] In addition, in this embodiment, due to the random stop of transmission of the call message, the miswiring is detected and an alarm is issued in both of the line units 26 (26-1), 26 (26-2) in which the transmission path is miswired. Therefore, for example, when three or more line units are connected, it is easy to know which circuit units are miswired.

[0106] In this embodiment as well, the reliability of the detection of a wiring error may be increased by detecting the wiring error when a response message is received a predetermined number of times in succession while a call is stopped.

[0107] [g. Modifications of the present invention] Modifications of the transmission system for disaster prevention equipment according to the present invention will be described in more detail below. The vehicle-mounted information display device according to the present invention includes the following modifications in addition to the above-described embodiment.

[0108] (Line unit) The above embodiment takes as an example a case in which two line units are provided on a control panel and four operation boxes are connected to each of the line units via a transmission line, but the number of line units and the number of operation boxes per line unit can be determined appropriately as needed.

[0109] (Disaster prevention equipment) The above embodiment takes a transmission system for gas fire extinguishing equipment as an example, but the present invention can be applied to any transmission system for disaster prevention equipment in which multiple terminal devices assigned to each line unit are connected to a transmission path drawn from multiple line units provided in a control panel, the line units transmit call messages sequentially from the addresses of the multiple terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive a call message specifying their own address.

[0110] In the above embodiment, "receiving a specific wiring check request" is implemented by "the line unit detecting a specific wiring check operation", but this is not limited to this. For example, the line unit may receive a specific wiring check request by operating a control panel and issuing a control command to the line unit as a result of the operation.

[0111] (Fourth transmission system for disaster prevention equipment) In the above embodiment, the line unit detects the erroneous connection by receiving a response message, but this is not limited to the above. The erroneous connection may be detected by directly receiving a wiring confirmation message as described below. That is, a line unit that has received a wiring confirmation request transmits a predetermined wiring confirmation message (wiring confirmation code), and when another line unit that has not received the wiring confirmation request receives the wiring confirmation message (wiring confirmation code), it detects an erroneous connection between its own transmission path and the transmission path of the other line unit and issues an alarm.

[0112] (others) Furthermore, the present invention is not limited to the above-described embodiment, but includes appropriate modifications that do not impair the objects and advantages of the present invention, and is not limited to the numerical values ​​shown in the above-described embodiment. [Explanation of symbols]

[0113] 10: Control panel 11:Fire detector 12: Operation box 24(24-1), 24(24-2): Transmission line 26(26-1), 26(26-2): Line unit 28: Common area 38, 48: Control section 40,50:Transmission section 60: Call message 62: Response message 64: Wiring confirmation code

Claims

1. A transmission system for disaster prevention equipment in which a plurality of terminal devices each assigned to a line unit are connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmit call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive the call message specifying their own address, The line unit that has received the predetermined wiring check request transmits the calling message including the predetermined wiring check information, when the terminal device receives the call message including the wiring confirmation information specifying the terminal device's own address, the terminal device transmits a response message including the wiring confirmation information; A transmission system for disaster prevention equipment, characterized in that when other line units that have not accepted the wiring confirmation request receive a response message including the wiring confirmation information, they detect a misconnection between their own transmission line and the transmission line of the other line unit and issue an alarm.

2. A transmission system for disaster prevention equipment in which a plurality of terminal devices each assigned to a line unit are connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmit call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive the call message specifying their own address, A transmission system for disaster prevention equipment, characterized in that a line unit that receives a specified wiring confirmation request stops sending the call message for a specified period of time or until the wiring confirmation request is released, and if the line unit receives the response message while the call message has been stopped, detects a misconnection between its own transmission line and the transmission line of another line unit and issues an alarm.

3. A transmission system for disaster prevention equipment in which a plurality of terminal devices each assigned to a line unit are connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmit call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive the call message specifying their own address, A transmission system for disaster prevention equipment, characterized in that the multiple line units stop sending the call message for a randomly set wiring confirmation time, and when the response message is received while the call message is stopped, detects a misconnection between its own transmission line and the transmission line of another line unit and issues an alarm.

4. A transmission system for disaster prevention equipment in which a plurality of terminal devices each assigned to a line unit are connected to a transmission line drawn from a plurality of line units provided in a control panel, the line units transmit call messages specifying the addresses of the plurality of terminal devices connected to their own lines, and the terminal devices transmit response messages when they receive the call message specifying their own address, The line unit that has received the predetermined wiring confirmation request transmits the predetermined wiring confirmation message together with the request, A transmission system for disaster prevention equipment, characterized in that when other line units that have not accepted the wiring confirmation request receive the wiring confirmation message, they detect a misconnection between their own transmission line and the transmission line of the other line unit and issue an alarm.

5. A disaster prevention equipment transmission system according to any one of claims 1 to 4, characterized in that the disaster prevention equipment is a gas-based fire extinguishing equipment, and a plurality of operation boxes are connected as the plurality of terminal devices to a transmission path drawn out from the plurality of line units.

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