JP2023112100A - Emergency facility - Google Patents

Abstract

To provide an emergency facility having high disaster-tolerance which is configured so as to minimize a transmission distance of an optical line when connecting a plurality of optical converters through a ring.SOLUTION: An emergency facility comprises: a disaster reception panel 12 that transmits and receives an optical signal; a first optical line 14-1 and a second optical line 14-2 whose starting ends are connected to the disaster reception panel 12; optical converters 10-1 to 10-10, sequentially connected to the first optical line 14-1 or the second optical line 14-2 alternately or every predetermined different numbers in one or a plurality of units, which convert optical signals and electrical signals alternately; facility instruments, connected to the optical converters 10-1 to 10-10 respectively, which transmit and receive electrical signals; and a third optical line which connects the first optical line 14-1 to the second optical line 14-2 by a ring through the optical converter 10-9 at a termination of the first optical line 14-1 and the optical converter 10-10 at a termination of the second optical line 14-2.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present invention relates to emergency equipment for monitoring an abnormality in a tunnel by connecting equipment such as a fire detector and a fire hydrant installed in the tunnel to a disaster prevention receiving panel of a monitoring center via an optical line.

2. Description of the Related Art Conventionally, emergency equipment is installed in tunnels such as motorways to protect people and vehicles from fire accidents that occur in the tunnels.

As such emergency equipment, fire detectors, manual reporting devices, and emergency telephones are installed to monitor and report fires, and fire hydrants are installed to extinguish fires and prevent the spread of fire. In order to protect against fire, a water spray head that sprays water for fire extinguishing is installed, and the equipment of the emergency equipment is connected to the transmission line from the disaster prevention receiver installed in the monitoring center and monitored and controlled. are constructing tunnel emergency equipment.

Tunnel emergency equipment, which consists of a disaster prevention receiving panel and equipment, is roughly divided into the R-type transmission system and the P-type direct transmission system. In the R-type transmission system, equipment such as a fire detector with an address is connected to the transmission line using a signal line cable drawn from the disaster prevention receiver panel, and individual management is performed to detect and control each equipment by transmission control. make it possible. In the P-type direct delivery system, equipment is divided into predetermined division units according to the type of equipment, and multiple equipment belonging to the same division is connected to the signal line drawn out for each division, and detection and control are performed for each signal line.

Tunnel emergency equipment using the R-type transmission method has various advantages in terms of function and management because it can detect and control individual equipment, but in general, equipment such as fire detectors has a transmission control function. Moreover, if the transmission distance is long, it is necessary to install a repeater amplifier board, which increases the cost.

On the other hand, the P-type direct transmission tunnel emergency equipment does not require a transmission control function in the fire detector, and even if the transmission distance is long, there is no need to install a repeater amplifier panel. Compared to , the system configuration is simple and inexpensive, but in addition to the inability to individually manage detection and control for each piece of equipment, the type of equipment such as fire detectors and manual reporting devices and the division of equipment Since separate dedicated signal lines are drawn out to connect the equipment, the number of wires increases, and if the tunnel length is long, the system configuration cost may rather increase.

Considering the advantages and disadvantages of the R-type transmission system and the P-type direct transmission system, tunnel length, vehicle traffic volume, etc., as tunnel emergency equipment, build tunnel emergency equipment for the R-type transmission system or P-type direct transmission system. I am trying to

JP-A-2002-246962 JP-A-11-128381 JP 2007-257569 A JP-A-06-137100

By the way, in the recent tunnel emergency equipment, equipment is connected to the metal transmission line that pulls out the signal cable from the disaster prevention receiver panel, and the metal transmission line is easily affected by electrical noise. As the transmission distance increases, the signal attenuation increases, so a repeater amplifier board is installed at each predetermined distance. Furthermore, if the usage period is prolonged, the electrical characteristics may deteriorate due to deterioration of the insulation, etc., and communication failure may occur. have a nature. Furthermore, in recent years, there is a tendency for tunnel lengths to exceed 10 kilometers, which makes it difficult for metal transmission lines to cope with these problems.

In order to solve this kind of problem, it is conceivable to use an optical line using optical fiber cables as the transmission line for tunnel emergency equipment, but there is no example of using an optical line for tunnel emergency equipment. A new issue is the construction of tunnel emergency equipment.

In addition, when an optical line is used for tunnel emergency equipment, it is possible to reliably maintain the communication connection between the disaster prevention receiving panel and the terminal side in the event of a failure such as a disconnection of the optical line or a decrease in the strength of the optical signal. Recovery is required.

FIG. 18 is an explanatory diagram showing an outline of an optical transmission system for tunnel emergency equipment that the applicant of the present application is studying.

As shown in FIG. 18, in the tunnel 11, for example, ten optical converters 10-1 to 10-10 are installed corresponding to equipment provided in the fire hydrant apparatus installed at intervals of 50 meters, for example. Optical converters 10-1 to 10-10 are connected in a ring by optical lines 14-1 and 14-2 drawn from a disaster prevention receiving panel 12 installed in a monitoring center or the like.

That is, the optical line 14-1 pulled out from the disaster prevention receiving board 12 is connected to the first optical converter 10-1, and then the subsequent optical converters 10-2 to 10-10 are connected to each other by optical line transition connections. They are connected in sequence, and are connected from the optical converter 10-10 located at the terminal end to the disaster prevention receiving panel 12 via the optical line 14-2.

In the connection of the optical line to the optical converters 10-1 to 10-10, the transmission distance of the optical line between the optical converters 10-1 to 10-10 is 50 meters corresponding to the installation interval of fire hydrants. However, the optical line 14-2 connecting the terminal optical converter 10-10 and the disaster prevention receiving board 12 extends from the optical converter 10-1 at the entrance of the tunnel 11 to the terminal terminal. Since the distance to the optical converter 10-10 is approximately 500 meters, the transmission distance of the optical line 14-2 is a long distance exceeding 500 meters. The transmission distance of the optical line to is quite long.

If the transmission distance of the optical line is increased in this way, communication may not be possible depending on the transmission speed. For example, a multi-mode optical fiber cable compatible with Ethernet (registered trademark) maximum communication speed 1000BASE-LX has a transmission distance of 2 to 550 meters, and there is a problem that communication becomes impossible when the maximum transmission distance is exceeded. It is desirable to shorten the transmission distance of the optical line as much as possible.

The present invention minimizes the transmission distance of an optical line when a plurality of optical converters installed in a tunnel are ring-connected to a disaster prevention receiver panel, and uses an optical line that can appropriately cope with an increase in tunnel length. The purpose is to provide emergency equipment with high failure.

(Emergency equipment 1)
The present invention is an emergency facility,
a disaster prevention receiver for transmitting and receiving optical signals;
A first optical line and a second optical line whose starting end is connected to the disaster prevention receiver;
a plurality of optical converters that are alternately connected to the first optical line or the second optical line in units of a plurality of units, and that convert between optical signals and electrical signals;
equipment connected to each of the plurality of optical converters for transmitting and receiving electrical signals;
a third optical line for ring-connecting the first optical line and the second optical line via the optical converter at the end of the first optical line and the optical converter at the end of the second optical line;
characterized by comprising

(Emergency equipment 2)
The present invention is an emergency facility,
a disaster prevention receiver for transmitting and receiving optical signals;
A first optical line and a second optical line whose starting end is connected to the disaster prevention receiver;
a plurality of optical converters that are alternately connected to the first optical line or the second optical line in units of one unit and arranged in a substantially single row to convert between optical signals and electrical signals;
equipment connected to each of the plurality of optical converters for transmitting and receiving electrical signals;
The first optical line and the second optical line are connected via two optical converters arranged substantially in a row, one at the end of the first optical line and the other at the end of the second optical line. a third optical line for ring-connecting the two optical lines;
characterized by comprising

(Disconnection monitoring control of disaster prevention receiving panel)
The disaster prevention receiver is
Sending a test signal to the optical converter connected to the first optical line to return a test response signal, determining disconnection and disconnection location of the first optical line when the test response signal is disconnected,
A test signal is transmitted to the optical converter connected to the second optical line to return a test response signal, and when the test response signal is disconnected, disconnection and disconnection point of the second optical line are determined.

(Emergency equipment 3)
The present invention is an emergency facility,
a disaster prevention receiver for transmitting and receiving optical signals;
A first optical line and a second optical line whose starting end is connected to the disaster prevention receiver;
a plurality of optical converters sequentially connected to the first optical line or the second optical line for converting between optical signals and electrical signals;
equipment connected to each of the plurality of optical converters for transmitting and receiving electrical signals;
a third optical line for ring-connecting the first optical line and the second optical line via the optical converter at the end of the first optical line and the optical converter at the end of the second optical line;
with
The disaster prevention receiver is
Sending a test signal to the optical converter connected to the first optical line to return a test response signal, determining disconnection and disconnection location of the first optical line when the test response signal is disconnected,
A test signal is transmitted to the optical converter connected to the second optical line, the test response signal is returned, and when the test response signal is cut off, the disconnection of the second optical line and the disconnection point are determined. and

(Optical line disconnection recovery control)
When the disaster prevention receiving board determines the disconnection and disconnection location of either the first optical line or the second optical line,
For the optical converter connected to the same optical line positioned before the disconnection point, continuing transmission and reception of optical signals to the optical line for which the disconnection has been determined,
The rest of the optical converters connected to the same optical line located behind the disconnection point are switched to transmission/reception of optical signals to the optical line for which the disconnection has not been determined.

(Disconnection recovery control of terminal optical line)
When the disaster prevention receiver board determines that the third optical line is disconnected,
causing the optical converter connected to the first optical line to continue transmitting and receiving optical signals to the first optical line;
The optical converter connected to the second optical line continues to transmit and receive optical signals to the second optical line.

(basic effect)
In the present invention, a plurality of optical converters provided corresponding to the equipment installed in the tunnel are connected to an optical line drawn into the tunnel from the disaster prevention receiving panel, and the optical converter receives data from the optical line. The tunnel emergency equipment converts the received optical signal into an electrical signal and outputs it to the equipment, and converts the electrical signal input from the equipment into an optical signal and transmits it to the optical line, wherein the plurality of optical converters: Grouped into a first group and a second group so as not to exceed a predetermined transmission distance corresponding to a predetermined communication speed due to the optical line, The converters are successively connected, the optical converters of the second group are successively connected to the second optical line pulled out from the disaster prevention receiving panel, and the optical converter at the end of the first group and the end of the second group are connected in sequence. Since the first optical line and the second optical line are ring-connected via the optical converter, the transmission distance between the disaster prevention receiving panel and the optical converter and the mutual connection of the optical converter is set to a transmission distance corresponding to the predetermined communication speed. To secure communication quality and reliability by minimizing the transmission distance of an optical line, which can be connected by an optical line whose length does not exceed 10 kilometers, even when the tunnel length exceeds 10 kilometers.

(Effect of grouping optical converters by one or more)
In addition, since the plurality of optical converters arranged in the longitudinal direction of the tunnel are alternately grouped into the first group and the second group in units of one or more, for example, the optical converters can be arranged in correspondence with the installation intervals of the fire hydrant devices. If the installation interval is 50 meters, and the plurality of optical converters are alternately divided into the first group and the second group, the transmission distance between the optical converters in each group is 100 meters, which is twice the installation interval. In addition, the transmission distance between the optical converter located at the head of the group and the disaster prevention receiver does not exceed the prescribed transmission distance corresponding to the prescribed transmission speed, minimizing the transmission distance of the optical line. to ensure communication quality and reliability.

(Effect of alternating grouping of optical transducers with different numbers)
In addition, since the plurality of optical converters arranged in the longitudinal direction of the tunnel are grouped into the first group and the second group at intervals of a different predetermined number, the optical converters can be installed according to the installation interval of the fire hydrant system, for example. If the interval is 50 meters, and the first group is divided into units of one unit and the second group is alternately grouped into units of two units, the transmission distance between the optical converters of the second group, which is every other unit. is 50 meters or 100 meters, and the transmission distance between the optical converters of the first group, which is every other two units, is 150 meters. To ensure communication quality and reliability by minimizing the transmission distance of an optical line.

(Effect of communication control of disaster prevention receiver)
The disaster prevention receiving board selects the first optical line to transmit and receive optical signals with the optical converters of the first group, and selects the second optical line to transmit optical signals to the optical converters of the second group. Since the transmission and reception are arranged, the physical optical line connection to a plurality of optical converters is a ring connection. Communication traffic can be reduced by reducing the number of terminals per system.

(Effect of disconnection monitoring control of disaster prevention receiving panel)
In addition, the disaster prevention receiving board sequentially designates the optical converters of the first group by selecting the first optical line, transmits the test signal, and causes the test response signal to be returned. The disconnection and disconnection location of one optical line are determined, the second optical line is selected to sequentially designate the optical converters of the second group, the test signal is transmitted, the test response signal is returned, and the test response signal is disconnected. In this case, since the disconnection and the disconnection point of the second optical line are determined, the disconnection of the optical line can be reliably monitored by dividing the optical lines into the first group and the second group.

(Effect of disconnection recovery control of optical line)
In addition, when the disaster prevention receiving board determines that either the first optical line or the second optical line is disconnected and the location of the disconnection, it determines that the optical converter in the same group located before the location of the disconnection is disconnected. The transmission/reception of the selected optical signal is continued for the selected optical line, and the transmission/reception of the selected optical signal is continued for the remaining optical converters in the same group located behind the disconnection point, and the optical line for which the disconnection has not been determined is selected. For example, even if the first optical line connecting the optical converters of the first group by bus is broken, the remaining optical converters of the first group located behind the breakage point can be switched. communication with all the optical converters belonging to the first group can be continued by disconnection recovery control for switching the second optical line to transmission/reception of the selected optical signal, and the optical converters of the second group can be connected to the bus. Even if the connected second optical line is broken, the remaining optical converters of the second group located behind the broken point are restored by switching the first optical line to transmission/reception of the selected optical signal. By control, communication with all optical converters belonging to the second group can be continued.

(Effects of disconnection restoration control of the terminating optical lines of the first group and the second group)
Also, when the disaster prevention receiving board determines disconnection of the optical line that connects the first optical line and the second optical line through the optical converter at the end of the first group and the optical converter at the end of the second group. , the optical converters of the first group continue transmission and reception of optical signals through the first optical line, and the optical converters of the second group continue transmission and reception of optical signals through the second optical line. Therefore, the optical line connecting the optical converters located at the ends of the first group and the second group is not used under normal conditions. Since the communication with the optical converters of the two groups is not affected, it is sufficient to continue the communication with each group and take measures to repair and restore the disconnected optical line.

Explanatory diagram showing the outline of tunnel emergency equipment using optical circuits Block diagram showing the functional configuration of the embodiment of the disaster prevention receiver provided in FIG. FIG. 2 is a block diagram showing the functional configuration of an embodiment of the optical converter and equipment provided in FIG. 1; FIG. 4 is a block diagram showing the functional configuration of the embodiment of the controller provided in FIG. Explanatory diagram showing the basic configuration of an optical transmission system used for tunnel emergency equipment Explanatory diagram showing transmission control in a normal state by an optical transmission system Explanatory diagram showing disconnection monitoring control of the first optical line Explanatory diagram showing disconnection monitoring control of the second optical line Explanatory diagram showing disconnection restoration control when disconnection of the first optical line is determined Explanatory diagram showing disconnection recovery control when disconnection is determined in the second optical line Explanatory diagram showing disconnection restoration control when disconnection of the optical line connecting the optical converters at the end of the first group and the second group is determined. Explanatory diagram showing disconnection recovery control when disconnection is determined in both the first optical line and the second optical line Explanatory diagram showing an optical transmission system in which an odd number of optical converters are alternately grouped. Explanatory diagram showing a transmission system when two optical converters are grouped into a first group and a second group. Explanatory diagram showing an optical transmission system when every two optical converters of the first group are grouped and the remaining optical converters are grouped into a second group. Explanatory diagram showing an optical transmission system when every three optical converters are grouped into a first group and a second group. Explanatory diagram showing an optical transmission system in which optical converters are alternately grouped and duplicated. Explanatory diagram showing the outline of the optical transmission system of the tunnel emergency equipment under study

[Overview of Tunnel Emergency Equipment]
FIG. 1 is an explanatory diagram showing an outline of tunnel emergency equipment using an optical line. As shown in FIG. 1, inside the tunnel 11, fire detectors 25 are installed at intervals of 50 meters in the longitudinal direction of the tunnel to detect flames caused by fire. Fire hydrants 24 containing attached hoses are installed at intervals of 50 meters.

In addition to the fire detector 25 and the fire hydrant device 24, the tunnel 11 is equipped with a manual reporting device and an emergency telephone for reporting fires, as well as a fire alarm to protect the tunnel frame and ducts from fire. A water spray for sprinkling water for fire extinguishing from a water spray head is installed, but illustration is omitted.

In the tunnel 11, an optical converter 10 is arranged corresponding to a fire hydrant device 24 and a fire detector 25 installed at intervals of 50 meters. A fire detector 25 is connected.

On the other hand, a disaster prevention receiving board 12 is installed in the monitoring center or the like, and from the disaster prevention receiving board 12, an optical line 14-1 serving as a first optical line and an optical line 14-2 serving as a second optical line are connected to the tunnel 11. is pulled out, and a plurality of optical converters 10 installed in the tunnel 11 are connected in a ring. In the following description, the optical line 14-1 and the optical line 14-2 may be referred to as the optical line 14 when there is no need to distinguish between them.

An optical fiber cable such as FTTH is used for the optical lines 14-1 and 14-2, and optical wavelength division multiplexing (WDM) using IP packets, for example, is performed. As the physical specifications of the optical fiber cables used for the optical lines 14-1 and 14-2, for example, if the maximum communication speed of Ethernet (registered trademark) is 1000BASE-LX, the transmission distance is 2 when the cable type is multimode. ~550 meters. The optical fiber cables used for the optical lines 14-1 and 14-2 may have appropriate physical specifications as required.

In addition, a power line 16 is drawn into the tunnel from the disaster prevention receiving panel 12, and power is supplied to equipment installed in the optical converter 10, the fire detector 25, and the fire hydrant device 24 installed in the tunnel. there is

In addition, for the disaster prevention receiving panel 12, fire pump equipment 26, duct cooling pump equipment 27, ventilation equipment 28, alarm display board equipment 29, radio rebroadcast equipment 30, television monitoring equipment 31, lighting equipment 32 and IG Slave station equipment 33 and the like are provided. Except for connecting the IG slave station equipment 33 with a data transmission line, other equipment is individually connected to the disaster prevention receiving panel 12 by a P-type signal line.

Here, the ventilation equipment 28 is equipment that gives energy to the air in the tunnel by means of a high blowing wind speed generated by the operation of a jet fan installed on the ceiling side of the tunnel to generate a ventilation flow in the longitudinal direction of the tunnel.

The alarm display board facility 29 is a facility for notifying users in the tunnel of an abnormality in the tunnel by displaying it on an electric display board. The radio rebroadcast facility 30 is a facility for enabling drivers and the like to receive information from road administrators in tunnels. The television monitoring facility 31
This equipment is used to check the scale and location of fires, operate water spray equipment, and grasp the situation inside tunnels when conducting evacuation guidance.

The lighting equipment 32 is equipment for driving and managing the lighting equipment in the tunnel. Further, the IG slave station equipment 33 is a communication equipment that connects the disaster prevention receiving panel 12 and a remote monitoring control equipment 35, which is a higher-level equipment provided outside, via a network 34 .

[Equipment functional configuration]
FIG. 2 is a block diagram showing the functional configuration of an embodiment of the disaster prevention receiving panel provided in FIG.

(Disaster prevention receiver)
As shown in FIG. 2, the disaster prevention receiver panel 12 includes a panel control section 46, which is a function realized by executing a program, for example. using a computer circuit or the like with

Two systems of a transmission unit 48 and an optical transmission/reception unit 50 are provided for the board control unit 46 . An optical line 14-2 is drawn into the tunnel 11 from the .

The panel control unit 46 communicates with a display unit 52 equipped with a liquid crystal display, a printer, etc., an operation unit 54 equipped with various switches, etc., an alarm unit 56 equipped with a speaker, an alarm indicator lamp, etc., and external monitoring equipment. A modem 58 is provided, and the fire pump equipment 26, cooling pump equipment 27, ventilation equipment 28, alarm display board equipment 29, radio rebroadcast equipment 30, television monitoring equipment 31 and lighting equipment 32 shown in FIG. 1 are further connected. An IO unit 60 is provided.

The transmission unit 48 transmits and receives packet signals (electrical signals) according to a predetermined serial communication protocol.

The optical transmission/reception unit 50 converts the packet signal from the transmission unit 48 into an optical signal of a predetermined downstream wavelength band and transmits the optical signal to the optical lines 14-1 and 14-2. The optical signal of a predetermined upstream wavelength band received from is converted into a packet signal (electrical signal) and output to the transmission unit 48 .

For example, the optical transmitter/receiver 50 includes an electrical/optical converter (E/O converter) having a laser diode that converts an electrical signal into an optical signal, and an optical/optical converter having a photodiode that converts an optical signal into an electrical signal. It comprises an electrical converter (O/E converter) and a WDM filter that separates optical signals in the upstream wavelength band from the optical line and combines and sends optical signals in the downstream wavelength band to the optical line.

In this embodiment, the transmitting unit 48 and the optical transmitting/receiving unit 50 perform, for example, CWDM (coarse WDM) transmission, which is known as optical wavelength division multiplexing communication with a wide wavelength interval.

The panel control unit 46 controls transmission and reception of packet signals via the optical converter 10 to and from equipment installed in the tunnel via the transmission unit 48 and the optical transmission/reception unit 50 . The details of optical transmission control with the optical converter 10 by the board control unit 46 will be clarified later.

(optical converter)
FIG. 3 is a block diagram showing the functional configuration of an embodiment of the optical converter and equipment provided in FIG.

As shown in FIG. 3, the optical converter 10 is provided with a conversion control section 90, a first gateway 92, a second gateway 94, and a photoelectric conversion circuit section. In the photoelectric conversion circuit unit, in order to transmit and receive optical signals between the optical line 14 on the upstream side and the downstream side, a first optical transmission/reception unit 100-1 is provided in the optical line 14 on the upstream side. A second optical transmitter/receiver 100-2 is provided on the line 14. FIG.

The first optical transceiver 100-1 includes a WDM filter 102, an optical/electrical converter (O/E converter) 104 with a photodiode, and an electrical/optical converter (E/O converter) with a laser diode. 106. The second optical transceiver 100-2 includes a WDM filter 108, an optical/electrical converter (O/E converter) 110 with a photodiode, and an electrical/optical converter (E/O converter) with a laser diode. device) 112 .

The optical converter 10 extracts the optical packet signal of the downstream wavelength band from the upstream optical line 14 by the WDM filter 102 , converts it into an electrical packet signal by the optical/electrical converter 104 , and outputs it to the first gateway 92 . .

The first gateway 92 performs protocol conversion between the IP protocol on the optical line side and the TCP protocol on the equipment side, such as Ethernet (registered trademark), which is a predetermined LAN protocol.

The first gateway 92 outputs the electrical packet signal received from the optical/electrical converter 104 to the conversion control unit 90, and the conversion control unit 90 transfers the signal to the LAN line 62 if it is addressed to the IP address of the equipment connected to itself. Transmits LAN packet signals. Also, the conversion control unit 90 outputs an electrical packet signal to the second gateway 94 when the IP address does not correspond to the IP address of the equipment connected to itself. The second gateway 94 outputs the received electrical packet signal to the electrical/optical converter 112 to convert it into an optical packet signal in the downstream wavelength band, and transmits the optical packet signal from the WDM filter 108 to the downstream optical line 14 .

The upstream wavelength band optical packet signal from the downstream optical line 14 is separated by the WDM filter 108 and converted into an electrical packet signal by the optical/electrical converter 110, the IP address of which is addressed to the disaster prevention receiver panel 12. , through the second gateway 94, the control unit 10, and the first gateway 92, the electrical/optical converter 106 converts it into an optical packet signal of the upstream wavelength band, and the WDM filter 102 to the upstream optical line 14. sent.

Also, when the conversion control unit 90 receives a LAN packet signal with the destination IP address of the disaster prevention receiving panel 12 from the equipment side including the fire detector 25 and the fire hydrant device 24 via the LAN line 62 , the LAN packet signal is output to the first gateway 92 . Then, the electrical/optical converter 106 converts it into an optical packet signal of the upstream wavelength band, and transmits it to the optical line 14 on the upstream side via the WDM filter 102 .

(Functional configuration on equipment side)
As shown in FIG. 3, the fire detector 25 is directly connected to the LAN line 62 from the conversion control unit 90 of the optical converter 10, and a red indicator lamp 74 serving as equipment for the control system of the fire hydrant device 24. and a response lamp 78 are connected via a controller 70, and a transmitter 76 and a fire hydrant switch 80, which are facilities of the detection system, are connected via another controller 72. FIG.

Here, the transmission between the conversion control unit 90 of the optical converter 10 and the controllers 70 and 72 provided in the fire detector 25 and the fire hydrant system is used in the R-type fire alarm system in addition to the LAN protocol transmission. It is also good as a fire transmission protocol.

In the case of the fire transmission protocol, the downstream signal from the transmission unit of the conversion control unit 90 to the transmission units of the fire detector 25 and the controllers 70 and 72 is voltage mode transmission, and the voltage of the transmission line is changed within a predetermined voltage range. Transmitted as a voltage pulse. On the other hand, the upstream signal to the conversion control unit 90 from the transmission units of the fire detector 25 and the controllers 70 and 72 is transmitted in the current mode. An upstream signal is transmitted as a current pulse train.

FIG. 4 is a block diagram showing the functional configuration of an embodiment of a controller provided on the side of the fire hydrant device in FIG. 4(B) indicates a controller used for the equipment of the detection system.

The controller 70 used in the equipment of the control system shown in FIG. The terminal control unit 82 uses a computer circuit or the like having a CPU, memory, various input/output ports, and the like.

A unique IP address is set in the LAN transmission unit 84, and when the address of the packet signal received via the LAN line 62 matches the own address, the terminal control unit 82 transmits the control command set in the packet signal. is output to the drive circuit 86 to control the blinking of the red indicator lamp 74 connected as equipment, for example.

In addition, the drive circuit unit 86 keeps the red indicator lamp 74 in a lighting state in a normal state. Also, the controller 70 connected to the response lamp 78 shown in FIG. 3 is the same as that shown in FIG. 4(A).

A controller 72 used in the detection system of FIG. A unique IP address is set in the LAN transmission unit 84 . For example, a transmitter 76 is connected as equipment to the input circuit section 88. When the switch of the transmitter 76 is turned on by operating the push button, the input circuit section 88 detects the switch-on and outputs a fire notification signal. .

When the terminal control unit 82 detects the fire notification signal from the input circuit unit 88, it instructs the LAN transmission unit 84 to generate and transmit a packet signal in which the IP address of the disaster prevention receiver 12 and the fire notification information are set. I do.

It is desirable that the switch used for the transmitter 76 be a non-lock type switch. By using a non-locking switch for the transmitter 76, recovery operation after switch operation is unnecessary.

Also, the controller 72 connected to the fire hydrant switch 80 shown in FIG. 3 is the same as that shown in FIG. 4(B). The fire hydrant switch 80 is a switch that turns on when the fire hydrant valve opening/closing lever provided in the fire hydrant device 24 is operated to the open position, and a packet signal including a pump activation command for the fire pump equipment is sent to the disaster prevention receiving panel 12. . Furthermore, the fire hydrant switch 80 is connected in parallel with a fire pump starting switch (not shown) provided in the fire hydrant device 24 and used by the fire brigade.

Also, since the fire detector 25 of FIG. 3 has a built-in function of a LAN transmission section, it is not necessary to attach a controller externally. Also, in FIG. 4, the controllers 70 and 72 are externally attached to the equipment, but the equipment may be integrated with both.

The controllers 70 and 72 shown in FIG. 4 are powered by the power line 16 from the disaster prevention receiving panel 12 as shown in FIG. A battery power supply is provided for the controller 72 of the facility equipment shown in FIG. is performed, the power supply is switched to the power supply from the disaster prevention receiving panel 12 to operate the controller 72, thereby reducing the power consumption on the equipment side.

In addition, the terminal control unit 82 having the CPU of the controllers 70 and 72 in FIGS. The sleep mode may be released by wakeup and the device may be operated in the normal mode.

[Optical transmission system for tunnel emergency equipment]
FIG. 5 is an explanatory diagram showing the basic configuration of an optical transmission system used for tunnel emergency equipment.

As shown in FIG. 5, in this embodiment, ten optical converters 10-1 to 10-10 installed in a tunnel 11 are ring-connected to a disaster prevention receiving board 12 via optical lines 14-1 and 14-2. Take for example the case of

In the optical transmission system of this embodiment, the optical converters 10-1 to 10-10 are arranged so as not to exceed a predetermined transmission distance corresponding to a predetermined communication speed, which is determined by the physical specifications of the optical fiber cable used as the optical line. They are grouped into a first group G1 and a second group G2. In the following description, the optical converters 10-1 to 10-10 may be referred to as the optical converter 10 when there is no need to distinguish between them.

For example, the optical converters 10-1 to 10-10 are alternately grouped into a first group G1 and a second group G2. , 10-7, 10-9, and the second group G2 is composed of optical converters 10-2, 10-4, 10-6, 10-8, 10-10. In FIG. 5, the optical converters 10 of the first group G1 are hatched.

Corresponding to this grouping, five optical converters 10-1, 0-3, 10-5, 10-7, and 10-9 of the first group G1 are connected to the optical line 14-1 pulled out from the disaster prevention receiver panel 12. are sequentially connected, and the optical converters 10-2, 10-4, 10-6, 10-8, 10-10 of the second group G2 are connected to the optical line 14-2 drawn from the disaster prevention receiving board 12. Five units are sequentially connected.

Furthermore, the optical converter 10-9 at the end of the first group G1 and the adjacent optical converter 10-10 at the end of the second group G2 are interconnected by an optical line. The converters 10-1 to 10-10 are physically connected in a ring.

Here, the distance between the optical converters 10-1 to 10-10 is a transmission distance of 50 meters corresponding to the installation distance of the fire hydrant device 24 and the fire detector 25. are alternately divided into a first group G1 and a second group G2, the transmission distances of the adjacent optical converters in each group G1 and G2 are, for example, the adjacent optical converters 10-1 and 10-1 in the first group G1. In the case of 10-3, it is 100 meters, and for example, in the case of the adjacent optical converters 10-2 and 10-4 of the second group G2, it is also 100 meters. Also, if the transmission distance of the optical lines 14-1, 14-2 from the disaster prevention receiver 12 to the optical converters 10-1, 10-2 of the groups G1, G2 closest in the tunnel 11 is, for example, about 100 meters. It is enough.

For this reason, the optical converters 10-1 to 10-10 and the disaster prevention receiving panel 12 transmit optical signals using an optical line through an optical fiber cable with a maximum transmission distance of about 100 meters, which corresponds to the communication speed. Since it fits within the maximum transmission distance of the optical fiber cable, for example, within 550 meters, it reliably prevents communication failure due to the increase in transmission distance due to the lengthening of the tunnel, and improves the communication quality and reliability of optical transmission. be able to.

[Optical transmission control during normal monitoring]
FIG. 6 is an explanatory diagram showing transmission control in a normal state by the optical transmission system. The optical converters 10-2 and 10-10 at the beginning and end of G2 are extracted and shown.

The optical converters 10-1 to 10-10 are grouped into the first and second groups G1 and G2 on the disaster prevention receiving panel 12, and the optical lines 14-1 and 14-2 connected in a ring are normally monitored without disconnection failure. Inside, the board control unit 46 of the disaster prevention receiving board 12 shown in FIG. , the optical line 14-1 is selected to transmit and receive optical packet signals, while the optical converters 10-2, 10-4, 10-6, 10-8, 10-10 of the second group G2 and selects the optical line 14-2 and controls transmission/reception of the optical packet signal as in route B. FIG.

As a result, although the optical converters 10-1 to 10-10 are physically connected in a ring to the disaster prevention receiver board 12, the optical converter 10-1 belonging to the first group G1 is connected to the optical line 14-1. 120-9, and for the optical line 14-2, the IP addresses of the optical converters 10-2, . , and optical packet signals are not transmitted between the optical converters 10-9 and 10-10 located at the ends of the groups G1 and G2. -9 and the optical converter 10-10 are disconnected.

For this reason, during normal monitoring, the optical converters 10-1 to 10-9 and the optical converters 10-2 to 10-10 of each group G1 and G2 for the disaster prevention receiver panel 12 are connected via the optical lines 14-1 and 14-2. In a bus-connected state, independent transmission and reception of optical packet signals are performed by two optical transmission systems, and the communication traffic of each transmission system, etc. is reduced to about half compared to the case where transmission is logically performed by ring connection. It can reduce the communication quality and reliability of the optical transmission system.

[Disconnection monitoring control of optical transmission system]
(Disconnection monitoring control of optical line 14-1)
FIG. 7 is an explanatory diagram showing disconnection monitoring control of the first optical line. The board control unit 46 of the disaster prevention receiving board 12 shown in FIG. IP addresses 5, 10-7, and 10-9 are sequentially specified, and an optical packet test signal is transmitted periodically, and an optical packet test response signal is returned as indicated by route A2. When the optical packet test response signal is cut off, the breakage and breakage location of the optical line 14-1 serving as the first optical line are determined, and a breakage alarm is issued.

Further, the panel control unit 46 monitors the disconnection of the optical line connecting the optical converters 10-9 and 10-10 at the ends of the first group G1 and the second group G2, so that the optical fiber of the first group G1 Following the transmission of the optical packet test signal specifying the IP addresses of the converters 10-1, 10-3, 10-5, 10-7 and 10-9, the optical converter 10 positioned at the end of the second group G2 An optical packet test signal designating the IP address of -10 is transmitted, and an optical packet test response signal is returned from the optical converter 10-10.

When the optical converter 10-10 at the end of the second group G2 receives an optical packet test signal designating its own IP address from an upstream optical line, it sends an optical packet response signal to the upstream optical line. let me reply Specifically, when the conversion control unit 90 of the optical converter 10 shown in FIG. control is performed so that an optical packet test response signal designating the IP address of is returned from the first optical transceiver 100-1 to the optical line 14 on the upstream side.

The panel control unit 46 notifies a disconnection alarm and performs disconnection recovery control, which will be clarified later.

(Disconnection monitoring control of optical line 14-2)
FIG. 8 is an explanatory diagram showing disconnection monitoring control of the second optical line. The board control unit 46 of the disaster prevention receiving board 12 shown in FIG. are designated sequentially to transmit the optical packet test signal periodically, and the optical packet test response signal is returned as indicated by route B2. , the disconnection and disconnection location of the optical line 14-2, which is the second optical line, are determined, and control is performed to issue a disconnection alarm.

The disconnection monitoring of the optical lines connecting the optical converters 10-9 and 10-10 at the ends of the first group G1 and the second group G2 is not based on the above-described disconnection monitoring on the first group G1 side. Following the transmission of the optical packet test signal designating the IP addresses of the optical converters 10-2, 10-4, 10-6, 10-8, and 10-10 of the second group G2, to the end of the first group G1 An optical packet test signal designating the IP address of the located optical converter 10-9 may be transmitted, and an optical packet test response signal may be returned.

[Disconnection recovery control of optical transmission system]
(Disconnection restoration control of the first optical line)
FIG. 9 is an explanatory diagram showing disconnection restoration control when disconnection of the first optical line is determined. As shown in FIG. 9, the board control unit 46 of the disaster prevention receiving board 12 shown in FIG. 120 is performed.

Discrimination of the disconnection point 120 by the panel control unit 46 is based on the assumption that the disconnection occurred between the optical converter 10-1 and the adjacent optical converter 10-3 (not shown) of the same first group G1. Then, although the optical packet test response signal from the optical converter 10-1 is received, the optical packet test response signals from the optical converters 10-3, 10-5, 10-7 and 10-9 are no longer received. , and based on this, it can be determined that the disconnection point 120 is between the optical converters 10-1 and 10-3.

When discriminating the disconnection point 120 between the optical converter 10-1 and the optical converter 10-3, the board control unit 46 determines the optical converter 10-1 of the first group G1 located before the disconnection point 120. 10-3, 10-5, and 10-7 of the first group G1 located behind the disconnection point 120. , 10-9, the optical line 14-2 is selected and, as shown in route B, the photodetectors 10-2, 10-4, 10-6, 10-8, 10 −10 followed by the IP addresses of the optical converters 10-9, 10-7, 10-5 and 10-3 of the first group G1 connected behind the disconnection point 120. Controls switching to packet signal transmission/reception. This disconnection restoration control is control for switching the logical bus connection under normal monitoring to the logical ring connection.

(Disconnection restoration control of the second optical line)
FIG. 10 is an explanatory diagram showing disconnection recovery control when disconnection of the second optical line is determined. The board control unit 46 of the disaster prevention receiving board 12 shown in FIG. 2, as shown in FIG. Perform disconnection recovery control.

Discrimination of the disconnection point 120 by the board control unit 46 is based on the assumption that the disconnection occurred between the optical converter 10-2 of the second group G2 and the adjacent optical converter 10-4 of the same second group G2. Then, although the optical packet test response signal from the optical converter 10-2 is received, the optical packet test response signals from the optical converters 10-4, 10-6, 10-8 and 10-10 are no longer received. , based on this, it can be determined that the disconnection point 120 is between the optical converter 10-2 and the optical converter 10-4.

When discriminating the disconnection point 120 between the optical converter 10-2 and the optical converter 10-4, the panel control unit 46 determines the optical converter 10-2 of the second group G2 located before the disconnection point 120. 10-4, 10-6, and 10-8 of the second group G2 located behind the disconnection point 120. , 10-10, the first optical line 14-1 is selected and, as indicated by route A, the optical converters 10-1, 10-3, 10-5, 10-7 of the second group G1. , 10-9, the IP addresses of the optical converters 10-10, 10-8, 10-6 and 10-4 of the second group G2 connected behind the disconnection point 120 are sequentially specified. control to switch to transmission/reception of optical packet signals.

(Disconnection restoration control of the terminal optical lines of the first group and the second group)
FIG. 11 is an explanatory diagram showing disconnection recovery control when disconnection of the optical line connecting the end optical converters of the first group and the second group is determined.

The board control unit 46 of the disaster prevention receiving board 12 shown in FIG. 2, as shown in FIG. When the disconnection point 120 due to the disconnection of the optical line is determined, the route that selects the optical line 14-1 for the optical converters 10-1 to 10-9 of the first group G1 is selected as in the normal monitoring. Continue transmission/reception of the optical packet signal indicated by A, and continue transmission/reception of the optical packet signal indicated by route B with the optical line 14-2 selected for the optical converters 10-2 to 10-10 of the second group G2. control to allow

Disconnection of the optical lines between the optical converters 10-9 and 10-10 arranged at the ends of the respective groups G1 and G2 is physically caused by the optical lines 14-1 and 14-2 to the disaster prevention receiving board 12. The ring connection is changed to a physical bus connection, and the disaster prevention receiver 12 logically performs optical transmission control by bus connection. , it suffices to continue the logical bus connection as it is, and no special disconnection recovery control is required.

(Disconnection of the first optical line and the second optical line)
FIG. 12 is an explanatory diagram showing disconnection restoration control when disconnection is determined in both the first optical line and the second optical line.

As shown in FIG. 12, when both the optical line 14-1, which is the first optical line, and the optical line 14-2, which is the second optical line, are disconnected at the same disconnection point 120, optical transmission is logically terminated. Even if the bus connection is switched to the ring connection, the optical converters 10-3, . . . 10-9 of the first group and the optical converters 10-4, .・It is impossible to communicate with 10-10, and it is necessary to take measures such as construction work to quickly restore the disconnection point 120.

[Grouping of optical converters]
In the optical transmission system used for tunnel emergency equipment shown in FIG. 1, there are various forms other than those shown in FIG. 5 for grouping for shortening the transmission distance between optical converters. It looks like this:

(Grouping of odd number of optical converters)
FIG. 13 is an explanatory diagram showing an optical transmission system in which an odd number of optical converters are alternately grouped.

As shown in FIG. 13, in this embodiment, nine odd-numbered optical converters 10-1 to 10-9 installed in a tunnel 11 are alternately grouped into a first group G1 and a second group G2. A first group G1 consists of five optical converters 10-1, 10-3, 10-5, 10-7 and 10-9, and a second group G2 consists of optical converters 10-2 and 10-9. It consists of four units, 10-4, 10-6, and 10-8.

Corresponding to this grouping, the optical converters 10-1, 10-3, 10-5, 10-7 and 10-9 of the first group G1 are sequentially connected to the optical line 14-1 pulled out from the disaster prevention receiving panel 12. The optical converters 10-2, 10-4, 10-6 and 10-8 of the second group G2 are successively connected to the optical line 14-2 which is interconnected and led out from the disaster prevention receiving panel 12. FIG. Furthermore, the optical converter 10-9 at the end of the first group G1 and the adjacent optical converter 10-8 at the end of the second group G2 are interconnected by an optical line, whereby the disaster prevention receiver board 12 receives an optical signal. The converters 10-1 to 10-9 are physically connected in a ring.

In this way, the odd number of optical converters 10-1 to 10-9 are alternately grouped into a first group G1 and a second group G2, and connected to the disaster prevention receiving panel 12 via optical lines 14-1 and 14-2. In this case, the transmission distance of the adjacent optical converters in each group G1 and G2 is 100 meters as in the even number case of FIG. , it is possible to reliably prevent communication from becoming impossible due to an increase in the transmission distance, and improve the communication quality and reliability of optical transmission.

(Grouping every two optical converters)
FIG. 14 is an explanatory diagram showing a transmission system when every two optical converters are grouped into a first group and a second group.

As shown in FIG. 14, in this embodiment, ten optical converters 10-1 to 10-10 installed in a tunnel 11 are alternately grouped into a first group G1 and a second group G2. A first group G1 consists of six optical converters 10-1, 10-2, 10-5, 10-6, 10-9 and 10-10, and a second group G2 consists of optical converters. It consists of four units 10-3, 10-4, 10-7 and 10-8.

Corresponding to this grouping, optical converters 10-1, 10-2, 10-5, 10-6, 10-9 and 10- of the first group G1 are connected to the optical line 14-1 pulled out from the disaster prevention receiver panel 12. 10 are successively connected, and the optical converters 10-3, 10-4, 10-7, 10-8 of the second group G2 are successively connected to the optical line 14-2 drawn from the disaster prevention receiving board 12. be done. Furthermore, the optical converter 10-10 at the end of the first group G1 and the optical converter 10-8 at the end of the second group G2 are interconnected by an optical line. 1 to 10-10 are physically connected in a ring.

In this way, when the optical converters 10-1 to 10-10 are grouped every other two units and connected to the disaster prevention receiving panel 12 by the optical lines 14-1 and 14-2, the adjacent optical converters in each group G1 and G2 The transmission distance of the optical converter is 50 meters or 150 meters.

In the case of the first group G1, for example, the transmission distance between the optical converters 10-1 and 10-2 is 50 meters, and the transmission distance between the optical converters 10-2 and 10-5 is 150 meters. In the case of the second group G2, for example, the transmission distance between the optical converters 10-3 and 10-4 is 50 meters, and the transmission distance between the optical converters 10-4 and 10-7 is 150 meters.

Therefore, the maximum transmission distance of the optical line in the optical converters 10-1 to 10-10 installed in the tunnel 11 is 150 meters, which is within the maximum transmission distance of the optical fiber cable corresponding to the communication speed, for example, 550 meters. Therefore, it is possible to reliably prevent communication from becoming impossible due to an increase in transmission distance, and improve the communication quality and reliability of optical transmission.

(Grouping with a different optical converter unit for each group)
FIG. 15 is an explanatory diagram showing an optical transmission system in which every two optical converters of the first group are grouped and the remaining optical converters are grouped into the second group.

As shown in FIG. 15, in this embodiment, ten optical converters 10-1 to 10-10 installed in a tunnel 11 are assigned to a first group G1 every other two, and the rest are assigned to a second group G1. The first group G1 consists of four optical converters 10-1, 10-4, 10-7 and 10-10, and the second group G2 consists of optical converters. It consists of six units 10-2, 10-3, 10-5, 10-6, 10-8, and 10-9.

Corresponding to this grouping, optical converters 10-1, 10-4, 10-7 and 10-10 of the first group G1 are successively connected to the optical line 14-1 pulled out from the disaster prevention receiving panel 12, and , the optical converters 10-2, 10-3, 10-5, 10-610-8, 10-9 of the second group G2 are successively connected to the optical line 14-2 pulled out from the disaster prevention receiving board 12. . Furthermore, the optical converter 10-10 at the end of the first group G1 and the optical converter 10-9 at the end of the second group G2 are interconnected by an optical line. 1 to 10-10 are physically connected in a ring.

When the optical converters 10-1 to 10-10 are grouped in this way and connected to the disaster prevention receiving panel 12 by the optical lines 14-1 and 14-2, the adjacent optical converters in the first group G1 The transmission distance will be 150 meters, and the transmission distance of adjacent optical converters in the second group G2 will be 50 meters or 100 meters.

Therefore, the maximum transmission distance of the optical line in the optical converters 10-1 to 10-10 installed in the tunnel 11 is 150 meters, which is within the maximum transmission distance of the optical fiber cable corresponding to the communication speed, for example, 550 meters. Therefore, it is possible to reliably prevent communication from becoming impossible due to an increase in transmission distance, and improve the communication quality and reliability of optical transmission.

(Grouping every three optical converters)
FIG. 16 is an explanatory diagram showing an optical transmission system when every three optical converters are grouped into a first group and a second group.

As shown in FIG. 16, in this embodiment, ten optical converters 10-1 to 10-10 installed in a tunnel 11 are alternately grouped into a first group G1 and a second group G2 every three units. A first group G1 consists of six optical converters 10-1, 10-2, 10-3, 10-7, 10-8 and 10-9, and a second group G2 consists of optical converters. It consists of four units 10-4, 10-5, 10-6, and 10-10.

Corresponding to this grouping, optical converters 10-1, 10-2, 10-3, 10-7, 10-8, 10- of the first group G1 are connected to the optical line 14-1 pulled out from the disaster prevention receiver panel 12. 9 are successively connected, and the optical converters 10-4, 10-5, 10-6 and 10-10 of the second group G2 are connected to the optical line 14-2 drawn from the disaster prevention receiving panel 12. Four units are sequentially connected. Furthermore, the optical converter 10-9 at the end of the first group G1 and the optical converter 10-10 at the end of the second group G2 are interconnected by an optical line. 1 to 10-10 are physically connected in a ring.

In this way, when the optical converters 10-1 to 10-10 are alternately grouped every three units and connected to the disaster prevention receiving panel 12 by the optical lines 14-1, 14-2, each group G1, G2 , the transmission distance of adjacent optical transducers is 50 meters or 200 meters.

Therefore, the maximum transmission distance of the optical line in the optical converters 10-1 to 10-10 installed in the tunnel 11 is 200 meters, which is within the maximum transmission distance of the optical fiber cable corresponding to the communication speed, for example, 550 meters. Therefore, it is possible to reliably prevent communication from becoming impossible due to an increase in transmission distance, and improve the communication quality and reliability of optical transmission.

[Duplication of optical lines]
FIG. 17 is an explanatory diagram showing an optical transmission system in which optical converters are alternately grouped and duplicated.

As shown in FIG. 17, for the optical converters 10-1 to 10-10 installed in the tunnel 11, ordinary optical lines 14-11 and 14-21 are pulled out from the disaster prevention receiving panel 12, and one The standby optical lines 14-12 and 14-22 are drawn out from the disaster prevention receiving panel 12, and are similarly connected alternately.

The optical converters 10-1 to 10-10 connect the first optical transmitter/receiver 100-1 and the second optical transmitter/receiver 100-2 shown in FIG. , a third optical transmitting/receiving unit and a fourth optical transmitting/receiving unit having the same configuration are provided, and are duplicated by connecting to the conversion control unit 90 via a separately provided third gateway and fourth gateway.

During normal monitoring, the disaster prevention receiving board 12 selects the common optical lines 14-11 and 14-21 and divides the optical signals into the first group and the second group for transmission and reception, as shown in FIG. When both of the regular optical lines 14-11 and 14-21 are broken, switching is made to the standby optical lines 14-12 and 14-22, and the optical signals are divided into the first group and the second group for transmission/reception. Restoration control can be performed.

[Modification of the present invention]
(OLTs and ONUs)
In the above-described embodiment, the functions of the optical transceivers 50, 100-1200-2 are provided in the disaster prevention receiver 12 and the optical converter 10 on the facility equipment side. , an OLT (Optical Line Terminal) used for optical communication is used, and an ONU (Optical Network Unit) known as an optical line terminal is used as the optical transmitter/receiver 100-1200-2 on the optical converter 10 side. May be used.

(gateway device)
In the above embodiment, the optical converter 10 is provided with a gateway function, but a commercially available gateway device may be used as the gateway.

(equipment)
In the above-described embodiment, the fire detector and the red indicator light provided in the fire hydrant device, the transmitter, the response lamp, and the fire hydrant switch are taken as examples of equipment that is monitored and controlled by the optical line. The same shall apply to equipment of facilities.

(Non-IP)
In the above embodiment, by setting an IP address in the transmission part of equipment such as a red indicator light, a transmitter, a response lamp, and a fire hydrant switch provided in a fire detector and a fire hydrant device, disaster prevention receivers and equipment Although the transmission control according to the IP protocol is performed between them via an optical line, the present invention is not limited to this. For example, an address other than an IP address may be set in the terminal device, and transmission control may be performed via an optical line according to a predetermined communication protocol, for example, a fire transmission protocol used in R-type fire alarm equipment.

(others)
Moreover, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values shown in the above embodiments.

10, 10-1 to 10-10: Optical converter 11: Tunnel 12: Disaster prevention receiver board 14, 14-1, 14-2: Optical line 14-11, 14-21: Regular optical line 14-12, 14- 22: Standby optical line 16: Power line 24: Fire hydrant device 25: Fire detector 46: Panel control unit 48: Transmission unit 50: Optical transmission/reception unit 60: IO unit 62: LAN lines 70, 72: Controller 74: Red Indicator light 76: Transmitter 78: Response lamp 80: Fire hydrant switch 82: Terminal control unit 84: LAN transmission unit 86: Drive circuit unit 88: Input circuit unit 90: Conversion control unit 92: First gateway 94: Second gateway 100 -1: first optical transmitter/receiver 100-2: second optical transmitter/receiver 102, 108: WDM filters 104, 110: optical/electrical converters 106, 112: electrical/optical converter 120: disconnection point

Claims (3)

a disaster prevention receiver for transmitting and receiving optical signals;
a first optical line and a second optical line whose starting ends are connected to the disaster prevention receiver;
a plurality of optical converters that are alternately connected to the first optical line or the second optical line in units of a plurality of units, and that convert between optical signals and electrical signals;
equipment connected to each of the plurality of optical converters for transmitting and receiving electrical signals;
a third optical line for ring-connecting the first optical line and the second optical line via an optical converter at the end of the first optical line and an optical converter at the end of the second optical line;
An emergency facility characterized by comprising
a disaster prevention receiver for transmitting and receiving optical signals;
a first optical line and a second optical line whose starting ends are connected to the disaster prevention receiver;
a plurality of optical converters that are alternately connected to the first optical line or the second optical line in units of one unit and arranged in a substantially single row to convert between optical signals and electrical signals;
equipment connected to each of the plurality of optical converters for transmitting and receiving electrical signals;
Through the two optical converters arranged substantially in a row at the end of the first optical line and the optical converter at the end of the second optical line, the first a third optical line for ring-connecting the optical line and the second optical line;
An emergency facility characterized by comprising
In the emergency equipment according to claim 1 or 2,
The disaster prevention receiving board
A test signal is transmitted to the optical converter connected to the first optical line to return a test response signal, and when the test response signal is disconnected, the disconnection and disconnection location of the first optical line are determined. ,
A test signal is transmitted to the optical converter connected to the second optical line to return a test response signal, and when the test response signal is disconnected, disconnection and disconnection location of the second optical line are determined. ,
An emergency facility characterized by:

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