TW202333823A - Disaster prevention system capable of reducing the number of wiring connected between a terminal machine and a control panel - Google Patents

Abstract

The object of the present invention is to reduce the number of wiring connected between a terminal machine and a control panel. The solution of the present invention is a fire extinguishing system (1), which includes a plurality of nozzle units (4), a central operating panel (3) that controls the plurality of nozzle units (4), and an on-site control panel (5). The plurality of nozzle units (4) are communicably connected to an annular wiring (L2) via the central operating panel (3), and are communicably connected to an annular wiring (L3) via the on-site control panel (5).

Description

Disaster prevention system

The present invention relates to a disaster prevention system.

Conventionally, as sprinkler equipment installed in high-ceiling areas such as atriums and exhibition halls, sprinkler equipment such as a water-discharging type head has been known. For example, Patent Document 1 describes a sprinkler equipment such as a discharge type head. This equipment is equipped with: a plurality of movable heads installed in a protective area; and a central operating panel that activates the movable heads in conjunction with a fire signal. An on-site operation panel for conducting fire source exploration, instructing water release, and manual remote operation of the movable head. [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Publication No. 2013-230409

[Problem to be solved by the invention]

The traditional first-class water-discharging sprinkler equipment has movable heads connected individually to the central operating panel and the on-site operating panel. Therefore, as the number of movable heads increases, there is a problem that the number of wires connected to the central operation panel and the field operation panel increases.

The present invention was developed in view of this problem, and its purpose is to reduce the number of wires connected from terminal equipment to the control panel. [Technical means to solve problems]

In order to solve the above-mentioned problems, the disaster prevention system of the present invention communicatively connects a plurality of terminal devices and a control panel for controlling the plurality of terminal devices via a first ring wiring.

In an ideal form, the plurality of terminal devices are nozzle units each equipped with a fire sensing part and a water discharge part, and the control panel is one of a central control panel and an on-site control panel.

In a more ideal aspect, the plurality of terminal devices are communicatively connected to the other one of the central control panel and the field control panel via the second ring wiring.

In a more ideal form, the control panel communicates with the plurality of terminal machines through polling, and switches the transmission mode for each poll. The transmission mode includes a first transmission mode and a second transmission mode, and the transmission mode includes a first transmission mode and a second transmission mode. 1 transmission mode is when the control panel transmits signals in the first direction of the first ring wiring, and on the other hand, the plurality of terminal devices transmit signals in the second direction opposite to the first direction. The second In the transmission mode, the control panel transmits signals to the second direction, and on the other hand, the plurality of terminal devices transmit signals to the first direction. [Effects of the invention]

According to the present invention, the number of wirings connected from the terminal equipment to the control panel can be reduced.

1. Implementation form 1-1.Composition

A fire extinguishing system 1 according to an embodiment of the present invention will be described with reference to the drawings. The fire extinguishing system 1 of this embodiment is a first-class water discharge type sprinkler installed in the high ceiling part of the building B. FIG. 1 shows a block diagram of the structure of the fire extinguishing system 1 . The fire extinguishing system 1 shown in the same figure includes: an automatic fire alarm device 2, a central operation panel 3, a plurality of nozzle units 4, an on-site control panel 5 and an on-site operation unit 6. Each component is explained below.

The automatic fire alarm device 2 includes a plurality of sensors installed on the high ceiling of building B and an R-type fire receiver installed in the disaster prevention center of building B (both are not shown in the figure). Among these, the sensor is, for example, a smoke sensor or a flame sensor, and transmits an analog value representing the measured physical quantity to the fire receiver. The fire receiver transmits the sensor reporting signal to the central operating panel 3 when the physical quantity measured by the sensor exceeds a predetermined threshold and its duration exceeds a predetermined time. The sensor transmit signal contains the address of the transmitting sensor.

The central operation panel 3 is a control panel installed in the disaster prevention center of building B and connected to the fire receiver via the signal line L1. The central operation panel 3 controls the nozzle unit 4 according to the sensor signal transmitted from the fire receiver or according to the operation performed by the processing center personnel. In addition, in order to support operations performed by processing center personnel, information on each nozzle unit 4 is managed. The so-called information on the nozzle unit 4 here refers to the status information and operation right information of the nozzle unit 4 .

The nozzle unit 4 is a terminal device installed in the high ceiling part of the building B, and is specifically a movable head. As shown in FIG. 1 , the nozzle unit 4 is communicatively connected to the central operation panel 3 via an annular wiring L2. In addition, the nozzle unit 4 is communicably connected to the field control panel 5 via the annular wiring L3. That is, the nozzle unit 4 is not individually connected to the central operating panel 3 and the local control panel 5 . Therefore, compared with the case of individual connection, the number of wires connected to the central operation panel 3 and the field control panel 5 is reduced.

The nozzle unit 4 is provided with: a water discharge part 41, a sensing part 42, a control part 43, and a signal relay part 44 (among them, for the water discharge part 41 and the sensing part 42, refer to FIG. 2. For the control part 43 and the signal relay part 44, The continuation part 44 is omitted from the figure).

The water discharge part 41 is a combination nozzle in which three types of heads, namely, long throw, medium throw, and near throw, are integrated into one structure.

The sensing unit 42 includes an infrared linear sensor 421 and a flame detector 422. Among them, the infrared linear sensor 421 detects high-temperature points in the warning area to detect their direction. On the other hand, the flame detector 422 is an infrared three-wavelength flame detector, and detects a fire source in the direction detected by the infrared linear sensor 421 .

The control unit 43 receives signals from the central operation panel 3 and the on-site control panel 5, and controls the water discharge unit 41 and the sensing unit 42 based on the received signals. In addition, the status information and operation right information of the nozzle unit 4 are managed according to the received signals.

The signal relay unit 44 relays signals exchanged between other nozzle units 4 and the central operation panel 3 or the field control panel 5 .

FIG. 2 is a diagram showing the operation of the nozzle unit 4 when a fire occurs. The nozzle unit 4 is normally stored in a state of being embedded in the wall surface (Fig. 2(a)). In this state, when a search start signal is input from the central operation panel 3, the nozzle unit 4 is activated, and the water discharge part 41 and the sensing part 42 become integrated and start rotating (Fig. 2(b)). After the rotation starts, the infrared linear sensor 421 detects the high temperature point in the warning area to detect its direction (Fig. 2(c)). If the direction of the high-temperature point is detected, the front of the flame detector 422 faces the direction in which it was detected, and the flame detector 422 detects the fire source F in that direction (Fig. 2(d)). If the fire source F is detected, the control unit 43 transmits a fire source position signal indicating the rotation angle to the central operation panel 3 . After the fire position signal is transmitted, the nozzle opening of the water discharge part 41 faces the detected fire source F. In this state, the nozzle unit 4 enters the standby state (Fig. 2(e)). After that, when a water discharge start signal is transmitted from the central operation panel 3 to the nozzle unit 4, water is discharged from the water discharge part 41 to the fire source F.

Next, the on-site control panel 5 will be described. The on-site control panel 5 is a control panel installed in a protected area where the nozzle unit 4 is installed. The on-site control panel 5 controls the nozzle unit 4 according to the operation signals input by the processing center personnel through the on-site operation unit 6 . In addition, in order to support operations performed by processing center personnel, information on each nozzle unit 4 is managed. The so-called information on the nozzle unit 4 here refers to the status information and operation right information of the nozzle unit 4 .

The field operation unit 6 is a portable information processing device used to operate the field control panel 5 . The on-site operation unit 6 is equipped with a display and a touch panel (both are omitted from the illustration) so that the nozzle unit 4 can be operated through the on-site control panel 5 . In addition, the field operation unit 6 is provided with terminals for connecting to the field control panel 5 and the central operation panel 3 via cables. This field operation unit 6 is normally connected to the central operation panel 3. When used, it is removed from the central operation panel 3, taken to the site, and connected to the field control panel 5.

1-2. Action The operation of the fire extinguishing system 1 will be explained. Specifically, communication actions, fire extinguishing actions, and water release stop and recovery actions are explained.

1-2-1. Communication actions The central operating panel 3 and the on-site control panel 5 communicate with each nozzle unit 4 through polling. The so-called polling method here refers to the communication method in which the master device periodically queries multiple slave devices for data transmission requirements. When the central operation panel 3 and the field control panel 5 communicate using this polling method, the first transmission mode and the second transmission mode are alternately switched for each polling. FIG. 3 shows a diagram of the first transmission mode, and FIG. 4 shows a diagram of the second transmission mode. In the two figures, the control panel 7 represents the central operation panel 3 and the on-site control panel 5 .

In the first transmission mode shown in FIG. 3, the control panel 7 transmits signals in a clockwise path (see arrow A1). In contrast, each nozzle unit 4 returns a signal in a counterclockwise direction (see arrow A2). On the other hand, in the second transmission mode shown in FIG. 4, the control panel 7 transmits the signal in a counterclockwise direction (see arrow A3). In contrast, each nozzle unit 4 returns a signal along a clockwise path (see arrow A4). In this way, by changing the signal transmission path for each poll, communication between the control panel 7 and each nozzle unit 4 becomes possible even if a communication failure occurs in a part of the network. For example, when the wiring between the control panel 7 and the nozzle unit 4a is disconnected, the control panel 7 cannot communicate with each nozzle unit 4 in the first transfer mode, but can communicate with each nozzle unit 4 in the second transfer mode.

The control panel 7 stores the occurred events in the event directory when events such as the exploration start command and the water release command occur. Then, when there is an event in the event directory, an interrupt is usually made at a ratio of 1 in 2 polling cycles to perform polling related to the event. On the other hand, when there is no event in the event directory, polling for status confirmation is performed on each nozzle unit 4 . In this polling, the status and operation authority of each nozzle unit 4 are confirmed.

1-2-2. Fire-fighting actions Next, the fire extinguishing operation will be explained. Specifically, the automatic fire extinguishing mode and the manual fire extinguishing mode are explained. Here, the automatic fire extinguishing mode refers to a fire extinguishing mode that automatically performs a continuous operation from the detection of fire to the release of water. In contrast, the manual fire extinguishing mode refers to a fire extinguishing mode that automatically selects the nozzle unit 4 that is most suitable for discharging water from the detection of fire. Regarding discharging water, it is a fire extinguishing mode that is started based on the operation of the central operation panel 3 or the on-site operation unit 6 . These two fire extinguishing modes can be switched by panel operation of the central operating panel 3.

1-2-2-1. Automatic fire extinguishing mode Figure 5 shows a program diagram of the automatic fire extinguishing mode. When the central operation panel 3 receives the sensor alarm signal from the fire receiver (step Sa1), it defines the nozzle unit 4 installed in the warning area of the sensor after the alarm (step Sa2). Then, a detection start signal is transmitted to the defined nozzle unit 4 (step Sa3). At this time, if the central operation panel 3 cannot confirm the ACK from its nozzle unit 4, it will retry. When confirmation cannot be obtained after retrying, the process will continue after the next polling cycle.

When receiving the detection start signal, the nozzle unit 4 starts fire source detection (step Sa4). In addition, the status information of this machine is updated from "Storage" to "Exploration". Furthermore, when the fire source detection result is that the fire source is detected (step Sa5), a fire source position signal indicating the rotation angle at the time of fire source detection is transmitted to the central operation panel 3 (step Sa6). In addition, the status information of this machine is updated from "Exploring" to "Confirmed".

The central operating panel 3 receives fire source position signals from all the nozzle units 4 in the fire area, or when a predetermined time elapses from the first report of the fire source position signal, the central operating panel 3 determines the fire source position signal based on the received fire source position signal. The signal selects the nozzle unit 4 most suitable for discharging water (step Sa7). Regarding the method of selecting the nozzle unit 4 at this time, refer to Japanese Patent Application Laid-Open No. 2000-093540, for example. When the central operation panel 3 selects the nozzle unit 4 most suitable for discharging water, the fire extinguishing pump (not shown) is started (step Sa8). In addition, a water discharge start signal is transmitted to the selected nozzle unit 4 (step Sa9). At this time, if the central operation panel 3 cannot confirm the ACK from its nozzle unit 4, it will retry. When confirmation cannot be obtained after retrying, the process will continue after the next polling cycle.

When the nozzle unit 4 receives the water discharge start signal, it transmits the signal to the on-site control panel 5 (step Sa10). When the on-site control panel 5 receives the water discharge start signal, it opens the start valve (not shown) corresponding to the nozzle unit 4 (step Sa11). As a result, water is discharged from the nozzle unit 4 to the fire source.

After the starting valve is released, the on-site control panel 5 receives the ON signal from the pressure switch (not shown) provided on the secondary side of the starting valve (step Sa12), and transmits a water discharge signal indicating the start of water discharge to Nozzle unit 4 (step Sa13). When the nozzle unit 4 receives the water discharge, it updates the status information of the machine from "confirmation" to "water discharge" (step Sa14). The above are instructions for the automatic fire extinguishing mode.

1-2-2-2. Manual fire extinguishing mode Figure 6 shows a program diagram of the manual fire extinguishing mode. The manual fire extinguishing mode shown in the figure is assumed to start discharging water in accordance with the operation of the central operation panel 3.

The central operation panel 3 transmits an operation request signal to the nozzle unit when the operation authority is acquired by the processing center personnel (step Sb1) after the above-mentioned selection of the nozzle unit 4 most suitable for discharging water is selected (step Sa7). 4 (step Sb2). At this time, if the central operation panel 3 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated. When the nozzle unit 4 receives its operation request signal, it updates the operation right information of the machine to the "central operation panel" (step Sb3). The update of the operation authority information is also reflected in the operation authority information stored on the central operation panel 3 through status confirmation. As a result, the water discharge preparation operation becomes possible on the central operation panel 3 .

After that, when the processing center personnel performs the water discharge preparation operation (step Sb4), the central operation panel 3 transmits the water discharge preparation signal to the nozzle unit 4 (step Sb5). At this time, if the central operation panel 3 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated. When the nozzle unit 4 receives its water discharge preparation signal, it updates the status information of the machine from "confirmed" to "prepared" (step Sb6). The update of the status information is also reflected in the status information stored on the central operation panel 3 through the status confirmation. As a result, the central operation panel 3 can perform the rotation operation and the water discharge operation.

Thereafter, when the central operating panel 3 is rotated by the processing center personnel (step Sb7), the central operating panel 3 transmits the rotation signal to the nozzle unit 4 (step Sb8). When the nozzle unit 4 receives the rotation signal, the water discharge part 41 is rotated in the direction indicated by the signal (step Sb9).

Thereafter, the central operation panel 3 starts the fire extinguishing pump (step Sb11) when the water discharge operation is performed by the processing center personnel (step Sb10). In addition, a water discharge start signal is transmitted to the nozzle unit 4 (step Sb12). At this time, if the central operation panel 3 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated.

When the nozzle unit 4 receives the water discharge start signal, it transmits the signal to the on-site control panel 5 (step Sb13). When the on-site control panel 5 receives the water discharge start signal, it opens the start valve corresponding to the nozzle unit 4 (step Sb14). As a result, water is discharged from the nozzle unit 4 to the fire source.

After the starting valve is released, when the on-site control panel 5 receives the ON signal from the pressure switch provided on the secondary side of the starting valve (step Sb15), it transmits a water discharge signal indicating the start of water discharge to the nozzle unit 4 (step Sb15). Sb16). When the nozzle unit 4 receives the water discharge signal, it updates the status information of the machine from "OK" to "Water Discharge" (step Sb17). The above are instructions for manual fire extinguishing mode.

Next, FIG. 7 shows another sequence diagram of the manual fire extinguishing mode. The manual fire extinguishing mode shown in this figure assumes that water discharge is started based on the operation of the field operation unit 6 connected to the field control panel 5 .

In the central operation panel 3, after the nozzle unit 4 most suitable for discharging water is selected (step Sa7), when the processing center personnel performs an operation to obtain the operation authority for the on-site operation unit 6 (step Sc1), the on-site control panel 5 The operation request signal is transmitted to the nozzle unit 4 (step Sc2). At this time, if the on-site control panel 5 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated. When the nozzle unit 4 receives its operation request signal, it updates the operation right information of the machine to the "on-site control panel" (step Sc3). This update of the operation authority information is also reflected in the operation authority information stored on the field control panel 5 through status confirmation. As a result, the water discharge preparation operation becomes possible in the on-site operation unit 6.

After that, when the processing center personnel performs the water discharge preparation operation on the on-site operation unit 6 (step Sc4), the on-site control panel 5 transmits the water discharge preparation signal to the nozzle unit 4 (step Sc5). At this time, if the on-site control panel 5 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated. When the nozzle unit 4 receives its water discharge preparation signal, it updates the status information of the machine from "confirmed" to "prepared" (step Sc6). The update of the status information is also reflected in the status information stored on the field control panel 5 through the status confirmation. As a result, the on-site operation unit 6 can perform the rotation operation and the water discharge operation.

Afterwards, when the processing center personnel performs a rotation operation on the on-site operation unit 6 (step Sc7), the on-site control panel 5 transmits the rotation signal to the nozzle unit 4 (step Sc8). When the nozzle unit 4 receives the rotation signal, the water discharge part 41 is rotated in the direction indicated by the signal (step Sc9).

Afterwards, when the processing center personnel performs a water discharge operation on the on-site operation unit 6 (step Sc10), the on-site control panel 5 transmits a water discharge request signal to the nozzle unit 4 (step Sc11). At this time, if the on-site control panel 5 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated.

When the nozzle unit 4 receives the water discharge request signal, it transmits the signal to the central operation panel 3 (step Sc12). When the central operating panel 3 receives the water discharge request signal, it starts the fire extinguishing pump (step Sc13). In addition, a water discharge start signal is transmitted to the nozzle unit 4 (step Sc14). When the nozzle unit 4 receives the water discharge start signal, it transmits the signal to the on-site control panel 5 (step Sc15). When the on-site control panel 5 receives the water discharge start signal, it opens the start valve corresponding to the nozzle unit 4 (step Sc16). As a result, water is discharged from the nozzle unit 4 to the fire source.

After the starting valve is released, when the on-site control panel 5 receives an ON signal from the pressure switch provided on the secondary side of the starting valve (step Sc17), it transmits a water discharge signal indicating the start of water discharge to the nozzle unit 4 (step Sc17). Sc18). When the nozzle unit 4 receives the water discharge signal, it updates the status information of the machine from "OK" to "Water Discharge" (step Sc19). The above are instructions for manual fire extinguishing mode.

1-2-3. Water release stop and recovery action Next, the water discharge stop and recovery operations will be described. Fig. 8 shows a sequence diagram of water discharge stop and recovery operations. The operation shown in this figure assumes that the water discharge is stopped and restored based on the operation of the central operation panel 3 .

The central operating panel 3 transmits a water discharge stop signal to the nozzle unit 4 (step Sd2) when the processing center personnel performs a water discharge stop operation (step Sd1). At this time, if the central operation panel 3 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated. When the nozzle unit 4 receives its water discharge stop signal, it transmits the signal to the on-site control panel 5 (step Sd3). When the on-site control panel 5 receives the water discharge stop signal, it closes the start valve corresponding to the nozzle unit 4 (step Sd4). As a result, water discharge from the nozzle unit 4 is stopped.

After the starting valve is closed, when the field control panel 5 receives an OFF signal from the pressure switch provided on the secondary side of the starting valve (step Sd5), it transmits a stop signal indicating that the water discharge is stopped to the nozzle unit 4 (step Sd5). Sd6). When the nozzle unit 4 receives the stop signal, it updates the status information of the machine from "discharge water" to "confirm" (step Sd7).

After that, when the processing center personnel performs a full restoration operation (step Sd8), the central operation panel 3 transmits the operation request signal to the nozzle unit 4 (step Sd9). At this time, if the central operation panel 3 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated. When the nozzle unit 4 receives its operation request signal, it updates the operation right information of the machine to "open" (step Sd10). The so-called "open" here means that the operation right does not exist in the central operation panel 3 and the on-site control panel 5. In addition, the nozzle unit 4 performs the restoration operation (step Sd11), and when the restoration operation is completed, the status information of the machine is updated from "confirmed" to "stored".

After that, when the processing center personnel performs the pump stop operation of the fire-extinguishing pump panel (not shown), the central operation panel 3 turns off the display indicating the operation of the fire-extinguishing pump (step Sd12). The above is an explanation of the water discharge stop and recovery actions.

Next, FIG. 9 shows another sequence diagram of the water discharge stop and recovery operation. The operation shown in this figure assumes that the water discharge is stopped and restored based on the operation of the field operation unit 6 connected to the field control panel 5 .

When the processing center personnel performs a water discharge operation on the on-site operation unit 6 (step Se1), the on-site control panel 5 transmits a water discharge stop request signal to the nozzle unit 4 (step Se2). At this time, if the on-site control panel 5 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated. When the nozzle unit 4 receives its water discharge stop request signal, it transmits the signal to the central operating panel 3 (step Se3). When receiving the water discharge stop request signal, the central operating panel 3 transmits the water discharge stop signal to the nozzle unit 4 (step Se4). When the nozzle unit 4 receives the water discharge stop signal, it transmits the signal to the on-site control panel 5 (step Se5). When the on-site control panel 5 receives the water discharge stop signal, it closes the start valve corresponding to the nozzle unit 4 (step Se6). As a result, water discharge from the nozzle unit 4 is stopped.

After the priming valve is closed, when the on-site control panel 5 receives an OFF signal from the pressure switch provided on the secondary side of the priming valve (step Se7), it transmits a stop signal indicating that the water discharge is stopped to the nozzle unit 4 (step Se7). Se8). When the nozzle unit 4 receives the stop signal, it updates the status information of the machine from "discharge water" to "confirm" (step Se9).

After that, when the processing center personnel performs the restoration operation on the on-site operation unit 6 (step Se10), the on-site control panel 5 transmits the operation request signal to the nozzle unit 4 (step Se11). At this time, if the on-site control panel 5 cannot confirm the ACK from its nozzle unit 4, it will retry. If confirmation cannot be obtained even after retrying, the operation is terminated. When the nozzle unit 4 receives its operation request signal, it updates the operation right information of the machine to "open" (step Se12). In addition, the restoration operation (step Se13) is performed. When the restoration operation is completed, the status information of the local machine is updated from "Confirm" to "Storage".

After that, when the processing center personnel performs the pump stop operation of the fire extinguishing pump panel, the central operation panel 3 turns off the display indicating the operation of the fire extinguishing pump (step Se14). The above is an explanation of the water discharge stop and recovery actions.

In addition, in the above-mentioned water discharge stop and recovery operation, although the central operation panel 3 outputs a water discharge stop signal, the nozzle unit 4 may output a water discharge stop signal instead of the central operation panel 3 . At this time, the nozzle unit 4 receives the water discharge stop request signal transmitted from the on-site control panel 5 and transmits the water discharge stop signal to the on-site control panel 5 .

2.Modification The above-described embodiment may be modified as follows. In addition, the following modifications can also be combined with each other.

2-1. Modification 1 The sensing unit 42 of the nozzle unit 4 is composed of the infrared linear sensor 421 and the flame detector 422 as described above. However, this structure is just an example. As long as it can detect and detect fire sources, it can also be composed of other sensors.

2-2. Modification 2 Auxiliary sensors may also be included in the fire extinguishing system 1 . The auxiliary sensor referred to here refers to a terminal device including the sensing unit 42 of the nozzle unit 4, the control unit 43, and the signal relay unit 44. In other words, it is the nozzle unit 4 which does not have the water discharge part 41. This auxiliary sensor is installed in the high-ceiling part of building B.

The auxiliary sensor and the nozzle unit 4 are also communicably connected to the central operating panel 3 via the annular wiring L2. In addition, it is connected to the field control panel 5 via a ring-shaped wiring L3 so as to be able to communicate with it.

This auxiliary sensor operates in the following manner in the above-mentioned automatic fire extinguishing mode. First, when the central operating panel 3 receives the sensor alarm signal from the fire receiver, it defines the nozzle unit 4 and the auxiliary sensor that are installed in the warning area of the sensor after the alarm. Then, a detection start signal is sent to the defined nozzle unit 4 and the auxiliary sensor.

The auxiliary sensor starts the fire source detection when receiving the detection start signal. Furthermore, when the fire source is detected as a result of the fire source detection, a fire source position signal indicating the rotation angle at the time of fire source detection is transmitted to the central operation panel 3 .

The central operating panel 3 receives the fire source position signals from all the nozzle units 4 and auxiliary sensors in the fire area, or when a predetermined time elapses from the first report of the fire source position signal, the central operation panel 3 responds based on the received fire source position signals. Based on the fire source position signal, the nozzle unit 4 that is most suitable for discharging water is selected. In this way, the fire source position signal transmitted from the auxiliary sensor is used to select the nozzle unit 4 most suitable for discharging water and is referred to.

2-3. Modification 3 In the above-mentioned embodiment, the fire extinguishing system 1 is connected by ring-shaped wiring. However, this ring-shaped wiring connection is also used in other disaster prevention systems. For example, in the automatic fire alarm equipment 2, a plurality of terminal devices and a control panel for controlling the plurality of terminal devices may be communicatively connected via ring-shaped wiring. Specifically, a plurality of local audio devices and fire receivers may be communicatively connected via ring-shaped wiring.

2-4. Modification 4 The sensor of the automatic fire alarm device 2 is not limited to the analog type, and may also be a sensor with a fixed sensitivity. In addition, the fire receiver is not limited to R type, and may also be P type.

1: Fire extinguishing system 2: Automatic fire alarm equipment 3: Central operating panel 4:Nozzle unit 5: On-site control panel 6: On-site operation unit 7:Control panel 41:Drainage Department 42: Perception Department 43:Control Department 44: Signal relay department 421: Infrared linear sensor 422: Flame detector

[Fig. 1] A block diagram showing the structure of the fire extinguishing system 1 [Fig. 2] A diagram showing the operation of the nozzle unit 4 when a fire occurs. [Fig. 3] Diagram showing the first transmission mode [Fig. 4] Diagram showing the second transmission mode [Figure 5] Program chart showing automatic fire extinguishing mode [Figure 6] Program chart showing manual fire extinguishing mode [Fig. 7] Another sequence diagram showing the manual fire extinguishing mode [Figure 8] A sequence diagram showing water discharge stop and recovery operations. [Fig. 9] Another sequence diagram showing water discharge stop and recovery operations.

1: Fire extinguishing system

2: Automatic fire alarm equipment

3: Central operating panel

4:Nozzle unit

5: On-site control panel

6: On-site operation unit

L1: signal line

L2: Ring wiring

L3: Ring wiring

Claims (4)

A disaster prevention system characterized in that a plurality of terminal devices and a control panel for controlling the plurality of terminal devices are communicatively connected via a first ring wiring. A disaster prevention system according to claim 1, wherein the plurality of terminal devices are nozzle units each equipped with a fire sensing part and a water discharging part. The aforementioned control panel is one of a central control panel and an on-site control panel. In the disaster prevention system of Claim 2, the plurality of terminal devices are communicatively connected to the other of the central control panel and the on-site control panel via a second ring wiring. If the disaster prevention system of any one of items 1 to 3 is requested, the aforementioned control panel communicates with the aforementioned plurality of terminal machines through polling, and the transmission mode is switched for each poll, The aforementioned transmission mode includes a first transmission mode and a second transmission mode. The first transmission mode is for the aforementioned control panel to transmit signals in the first direction of the aforementioned first ring wiring. On the other hand, the aforementioned plurality of terminal devices are for transmitting signals to and from the first ring wiring. In the second transmission mode, the control panel transmits signals to the second direction, while the plurality of terminal devices transmit signals to the first direction.

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