JP3379844B2 - Fire alarm system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system, and more particularly, to an autonomous distributed fire alarm system in which a fire monitoring function is distributed to main relays other than a fire receiver.

[0002]

2. Description of the Related Art In general, a fire alarm system including a receiver such as a fire receiver or a repeater and various terminal devices such as a fire detector connected to the receiver via a signal line, If this fire alarm equipment distributes the fire monitoring function to the main repeaters other than the fire receiver, each main repeater can operate independently even if there is no signal from the fire receiver. .
In such a so-called autonomous decentralized system,
Normally, when the main repeater does not recognize the existence of the fire receiver, various setting states from the fire receiver are discarded and the fire operation such as interlocking control can be performed by itself.

[0003]

By the way, in the case of the conventional fire alarm equipment as described above, the power source should be turned on when the building or the like provided with the fire alarm equipment is under construction, renovation or maintenance inspection. In such a case, if the power of the fire receiver is turned off in such a case, the setting state that was always used will be discarded, and as a result, after the fire receiver is restarted, There is a problem in that it is necessary to perform an input operation for returning to the original setting state to the main repeater, and it takes a lot of time and effort to restore it.

The present invention has been made to solve such a problem, and the main repeater maintains its set state when the fire receiver is restored after being turned off. The purpose is to provide a fire alarm system that can

[0005]

A fire alarm system according to the present invention is an autonomous system having various terminal devices and a plurality of receiving units connected to the terminal devices via signal lines for receiving information related to a fire. In the distributed fire alarm facility, a detection unit that detects a signal from one of the receiving units, and a case where the current setting state is maintained based on the output of the detection unit,
The present invention is provided with setting processing means for switching between the case of discarding the current setting state. Further, the receiving unit is assumed to be the main repeater.

Further, in an autonomous distributed fire alarm system having various terminal devices, a fire receiver connected to the terminal devices through a signal line for receiving information related to a fire, and a plurality of main repeaters. , The main repeater detects the signal from the fire receiver, and based on the output of the detector, switches between maintaining the current setting state and discarding the current setting state. And a setting processing unit for performing the setting.

[0007]

According to the present invention, the signals are detected between the main repeaters, and the case where the current setting state is maintained and the case where the current setting state is discarded are switched based on the detection output. Therefore, even if the power is turned off during construction or the like, the main repeater can maintain its set state. In addition, the main relay detects the signal from the fire receiver and, based on the detected output, switches between maintaining the current setting state and discarding the current setting state. The main repeater can maintain its set state when the fire receiver is restored after being powered off once during construction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the fire alarm system according to the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing a system configuration of an embodiment of a fire alarm system according to the present invention. In the figure, reference numeral 1 is a fire receiver, and the fire receiver 1 includes a plurality of main repeaters 2 to 4 as receiving units.
Are connected. The fire receiver 1 and the main repeaters 2 to 4 include, for example, a main loop signal line 5 for transmitting a signal in one direction and a sub loop signal line 6 for transmitting a signal in the other direction, respectively. Two lines of signal lines, each of which is a pair of signal lines, are connected in a loop.

Controlled devices are connected to the main repeaters 2 to 4 through various sensors and ordinary repeaters. Here, for example, the monitoring relay 11, the control relay 12, the gas leakage relay 13, the analog fire detector (photoelectric type,
(Ionization type, thermal type, etc.) 14, indicator 15, normal type smoke detector 21, differential type detector 22, constant temperature type sensor 23, terminator 24, district sound device (district bell) 25, transmitter 26 ,
It shows a case where a controlled device 31, such as a device for closing a fire door and a device for opening a smoke exhaust damper, a gas leak detector 41, etc. are connected.

A polling signal is sent from the fire receiver 1 to each of the main repeaters 2 to 4 and from each of the main repeaters 2 to 4 to the fire receiver 1 via both the main loop signal line 5 and the sub loop signal line 6. And a return signal, and various other signals are transmitted. In this case, the same signal is always flowed to both the main loop signal line 5 and the sub loop signal line 6. Therefore, the fire receiver 1 and each of the main repeaters 2 to 4 always receive the same signal on both the main loop signal line 5 and the sub loop signal line 6, and there is reception from the main loop signal line 5 side. In this case, only the signal on the main loop signal line 5 side is actually taken into the signal processing unit having a microcomputer (not shown) inside the fire receiver 1 or the main repeaters 2 to 4 for signal processing,
When the reception from the main loop signal line 5 side is lost due to an abnormality such as disconnection, the signal received on the sub loop signal line 6 side is taken into the signal processing unit inside the fire receiver 1 or the main repeaters 2 to 4.

With this configuration, the main loop signal line 5 is normally used.
According to the polling signal from the fire receiver 1 via
The main repeaters 2 to 4 take in signals from various sensors, perform signal processing for fire monitoring, and return the results to the fire receiver 1, or when it is detected that a fire has occurred, The operation of a controlled device such as a fire door is controlled by a command from the fire receiver 1.

FIG. 2 is a block diagram showing an example of a concrete circuit configuration of the fire receiver and the main repeater used in FIG. Here, the fire receiver 1 and one main repeater 2 among the main repeaters connected to the fire receiver 1 are shown, and the main repeater 2 includes a monitoring repeater. 11, control relay 12, analog fire detector 14, normal smoke detector 21, differential detector 22, district sound device 25,
It shows a case where various devices such as a controlled device 31 such as a device for closing a fire door and a device for opening a smoke exhaust damper are connected.

The fire receiver 1 includes a microprocessor (hereinafter referred to as MPU) 100 for performing various arithmetic processes, and a ROM 102, an EEPROM 103 and a RAM 10 which are connected to the MPU 100 via a bus 101.
4 to the MPU 100 via a bus 101 and an interface (hereinafter referred to as IF) 105, and a parallel / serial converter, a transmitter, a receiver, and a serial / parallel converter for transmitting / receiving information to / from the main repeater 2 and the like. A transmitter / receiver 106 having a converter (neither shown) or the like is connected to the MPU 100 via a bus 101 and an IF 107, and a status display by an LED (not shown) or an LCD (not shown) is used. The display unit 108 is configured to display details, and the operation unit 110 is connected to the MPU 100 via the bus 101 and the IF 109 and has various switches.

The ROM 102 stores in advance programs and the like related to the flowchart shown in FIG. 3 described later. The EEPROM 103 is an electrically writable and erasable non-volatile memory, and has settings such as addresses (serial numbers, buildings, floors, districts, numbers) of the main repeater and terminal equipment and type names of the terminal equipment in advance. It is stored.
Further, the RAM 104 is a work area 104a used when the MPU 100 performs various arithmetic processes, and a storage area 104 for storing various data to be sent to the main repeater.
b and.

The main repeater 2 is an MP that performs various arithmetic processes.
U200, ROM 202, EEPROM 203 and RAM 204 connected to the MPU 200 via a bus 201 respectively, and U200 connected to the MPU 200 via the bus 201 and further via IFs 205, 207 and 209, respectively. Transmitter / receiver units 206, 208 and 210 having a circuit configuration, and MPU
A timer 211 connected to the bus 200 via a bus 201,
The MPU 200 is connected via a bus 201 and an IF 213 to a mode setting holding switch 212. The switch 212 is provided on the internal board of the main repeater 2, although not shown. In addition, MPU20
0 includes a detection means and a setting processing means.

The ROM 202 stores in advance programs and the like related to the flowchart shown in FIG. 4 which will be described later. The EEPROM 203 is a non-volatile memory that is electrically writable and erasable, and has addresses (serial number, building, floor, district, number) of the main repeater and terminal equipment, the type name of the terminal equipment, and the fire discrimination value. Setting items such as a pre-alarm determination value and the like are stored in advance. RAM
Reference numeral 204 has a work area 204a used when the MPU 200 performs various arithmetic processes and the like, and a storage area 204b for storing various data to be sent to a fire receiver and the like. The main repeater has the same structure as the other main repeaters 3,
The configuration of 4 is similar to that of the main repeater 2.

Next, the operation will be described with reference to FIGS. 3 and 4. First, the operation of the fire receiver 1 will be described with reference to FIG. The fire receiver 1 basically calls the main repeaters 2 to 4, which are always connected by loop wiring, sequentially and cyclically in accordance with an address to collect information,
When there is an operation input, the necessary operation is performed according to the input. It should be noted that the MPU 100 makes all determinations in the following description of the operation. In step S1, R
The AM 104, the IFs 105, 107, 109 and the like are initialized, and the processing operations described below are sequentially performed for the first to Nth main repeaters connected to the fire receiver 1. In step S2, n representing the number of each main repeater is set to 0, incremented by 1 in step S3, and in step S4, it is determined whether or not there is an input from the operation unit 110.

If there is no input, step S9 described later.
If there is an input, go to step S5. In step S5, the input from the operation unit 110 is, for example,
It is determined whether or not it is the input of the mode setting such as the interlocking cutoff mode, the district acoustic stop mode, or the maintenance mode. The command is transmitted via the transmission / reception unit 106. Then, in step S7, it is determined whether or not there is a response signal from the main repeater that has sent the command,
If not, the process waits until there is a response signal, and when there is, a step S9 follows. If there is no response signal, it is considered that the main repeater that has sent the command is abnormal, and a display to that effect is displayed on the display unit 108 and the process proceeds to step S9, but the command is retransmitted a predetermined number of times. I am trying to do it.

If the mode setting is not input in step S5, the process according to other input is performed in step S8. For example, as other inputs, for example,
Possible are recovery input, various test inputs, and other mode setting inputs. Also in the case of this other processing, the process proceeds to step S9 after the processing operation.

Now, in step S9, the corresponding n-th main repeater is called and the status information is read. Then, in step S10, it is determined from the read state information whether or not there is a fire, that is, whether or not a fire signal is included. If it is a fire, in step S11, a process associated with the necessary fire operation is performed. If it is not a fire, in step S12, necessary processing according to other information is performed. Examples of the fire operation in step S11 include sounding, fire notification, interlocking operation, and display control. When the process of step S11 or S12 is completed, it is determined in step S13 whether or not it is the last N-th main repeater.
Returning to step 3, the above operation is repeated for the next main repeater, and when the processing of the last N-th main repeater is completed, the process returns to step S2 to set n to 0 and prepare for the next operation input. .

Next, the operation of the main repeaters 2 to 4 will be described with reference to FIG. Basically, these main repeaters 2 to 4 sequentially cyclically call various terminal devices connected via signal lines according to addresses to collect information, and receive commands from the fire receiver 1. And perform the necessary operation according to the instruction. It should be noted that the MPU 200 makes all determinations in the following description of the operation. In step S21, RAM 204, IF 205, 20
7, 209 and the like are initialized, and operations such as storing the contents of the EEPROM 203 in the storage area 204b of the RAM 204 for each main repeater are performed.

Next, 1 connected to the fire receiver 1
The processing operations described below are performed for the main repeaters No. to K. The operation of a specific main repeater, for example, No. 1 main repeater will be described. It is assumed that K terminal devices No. 1 to K are connected to this No. 1 main repeater. Therefore, in the first main repeater, kth (k = 1 to
The operation for the terminal device of step K) will be described. Step S
In step 22, the timer 211 is started, and in step S23, k representing the number of each main repeater is set to 0,
In step S24, increment by one,
In step S25, the polling signal from the fire receiver 1 is received and it is determined whether there is a call.

If there is no call from the fire receiver 1, the process proceeds to step S32, and the terminal devices are sequentially cyclically called to collect status information as will be described later, and if there is a call from the fire receiver 1, step S26 Proceed to. In step S26, the timer 211 is reset. This timer 211 is reset every time a signal is received from the fire receiver 1. Next, in step S27, it is determined whether or not it is a return command regarding the state information that is constantly and cyclically collected from the fire receiver 1, and if it is a return command, in step S28, in the storage area 204b of the RAM 204. The transmitter / receiver unit 2 receives status information of the terminal device, such as a normal status for each address, a fire status, and a pre-alarm status
It is sent to the fire receiver 1 via 06.

If it is not the return command in step S27, it is determined in step S29 whether or not it is a mode setting command from the fire receiver 1. If it is a mode setting command, in step S30 the storage area 204 of the RAM 204 is determined.
The mode setting is stored in a predetermined area of b, and a response signal to the mode setting command is sent to the fire receiver 1 via the transmitting / receiving unit 206. If it is not the mode setting command in step S29, the processing operation according to the other commands is performed in step S31. Then, when the processing operations in these steps S28, 30 and 31 are finished,
In either case, the process proceeds to step S32.

Now, in step S32, the k-th terminal device is called, its status information is read, and the RAM 20
4 is stored in a predetermined area of the storage area 204b. And
In step S33, the processing operation according to the state information is performed. Then, in step S34, the timer 211
It is determined whether or not the time is up. If the time is up, it is determined in step S35 whether or not the set mode is maintained. This determination is made by whether the switch 212 for holding the mode setting is turned on by the operator in advance at the time of construction or the like, and the state of the switch 212 is electrically confirmed through the IF 213 to hold the set mode. Whether the timer 211 has timed out is determined.

If the switch 212 is turned on and the mode is held in step S35, the process proceeds to step S37. If the switch 212 is off and the mode is not held in step S36, a predetermined storage area 204b of the RAM 204 is determined in step S36. After clearing the mode setting of the area, the process proceeds to step S37. In step S37, the RAM 20
The autonomous mode is set in a predetermined area of the four storage areas 204b. That is, when the signal from the fire receiver 1 is not given by the timer 211 for a predetermined time, the main repeater enters the autonomous mode in which it can operate independently.

When it is determined in step S34 that the timer 211 has not timed out, or when the autonomous mode is set in step S37, the process proceeds to step S38. In step S38, it is determined whether or not the terminal device is the last K-th terminal device, and if it is not the K-th terminal device, the process returns to step S24, and the above-described operation is repeated for the next main repeater to determine the last K-th terminal device. When the processing of the terminal device is completed, the process returns to step S23 and n is set to 0 to prepare for the next call.

Here, the difference in operation between the case where the mode is not the autonomous mode and the case where the mode is the autonomous mode will be briefly described.
In the non-autonomous mode, that is, in the state where there is a signal from the fire receiver 1 of the present embodiment and the supervisory control is performed, each of the main repeaters 2 to 4 performs an operation centering on the fire receiver 1. For example, even if the main repeater 2 recognizes the occurrence of a fire based on the information from the fire detector, if the fire receiver 1 is set to the state of stopping the district sound, the district sound does not ring. Then, when the information is transmitted from the main repeater 2 to the fire receiver 1 and a manager or the like inputs a stop release from the receiver board surface, a release command is transmitted to the main repeater 2 and the district acoustic ringing is performed. Be seen.

In the autonomous mode, that is, when there is no signal from the fire receiver 1 of this embodiment and no supervisory control is performed, the main repeater 2 performs its own operation,
When the occurrence of a fire is recognized as described above, the district sounding is performed under the control of the main repeater 2 itself. This is the main repeater 2
Since the administrator or the like cannot accept the operation input when the independent operation is performed, the necessary fire operation is performed as it is. Then, the main repeater 2 discards the state set by the fire receiver 1 when it enters the autonomous mode in order to operate independently.

As described above, in this embodiment, each main repeater maintains its set state even when the power of the fire receiver is turned off while keeping the monitoring state during construction or maintenance of the building. This eliminates the need to perform an input operation on each main repeater to restore the original setting state after reactivating the fire receiver.

In the above embodiment, whether or not the main repeater holds the mode set by the fire receiver, that is, when the main repeater cannot recognize the fire receiver, the current setting state is maintained. The case of switching between the case where the current setting state is canceled and the case where the current setting state is discarded have been explained by the case of setting the switch provided on the board inside the main repeater housing. You may

Further, in the present embodiment, the case where the presence of the fire receiver is discriminated by the presence or absence of the signal from the fire receiver has been described, but this is a premise of the present system. Because the status information return command is sent to each main repeater, the fire receiver responds to the call from the main repeater as a method of determining the existence of this fire receiver. You may make it discriminate | determine by whether or not. Further, as a premise of the present system, it may be possible to operate even when a plurality of main repeaters are used and there is no fire receiver.

[0033]

As described above, according to the present invention, the autonomous decentralized type having various terminal equipments and a plurality of receiving units connected to the terminal equipments through signal lines and receiving information related to a fire. In the fire alarm equipment, the detection means for detecting a signal from one of the receiving parts, and switching between the case of maintaining the current setting state and the case of discarding the current setting state based on the output of the detecting means. Since it is equipped with a setting processing means for performing the above, even if the power is turned off during construction, etc., the receiving unit, which is the main repeater, can maintain its setting state and maintain the monitoring state, and at the time of power restoration, the original setting is restored. There is an effect that the input operation for returning to the state becomes unnecessary and the complexity of the recovery work can be eliminated.

Further, in an autonomous decentralized fire alarm system having various terminal equipments, a fire receiver connected to the terminal equipments via a signal line for receiving information related to a fire, and a plurality of main repeaters. , The main repeater detects the signal from the fire receiver, and based on the output of the detector, switches between maintaining the current setting state and discarding the current setting state. Since it has a setting processing means to perform, when the fire receiver is restored after the power is turned off once during construction etc., the main repeater can maintain its set state and maintain the monitoring state and restore it. This has the effect of reducing the complexity of work.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a fire alarm system according to the present invention.

FIG. 2 is a configuration diagram showing a main part of an embodiment of a fire alarm system according to the present invention.

FIG. 3 is a flowchart for explaining the operation of an embodiment (fire receiver) of the fire alarm system according to the present invention.

FIG. 4 is a flow chart for explaining the operation of the embodiment (main repeater) of the fire alarm system according to the present invention.

[Explanation of symbols]

1 fire receiver 2-4 Main repeater 14 Analog fire detector 100,200 Microprocessor (MPU) 102,202 ROM 103, 203 EEPROM 104,204 RAM 106, 206, 208, 210 Transmitter / receiver 211 timer

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Claims (3)

(57) [Claims] 1. An autonomous decentralized fire alarm system having various terminal devices and a plurality of receiving units connected to the terminal devices via signal lines for receiving information related to a fire, wherein one of the receiving units is provided. And a setting processing unit for switching between the case of maintaining the current setting state and the case of discarding the current setting state based on the output of the detection unit. Fire alarm equipment characterized by. 2. The receiving unit is a main repeater.
Fire alarm equipment described. 3. An autonomous decentralized fire alarm system having various terminal devices, a fire receiver connected to the terminal devices via a signal line for receiving information related to a fire, and a plurality of main repeaters. , The main repeater detects the signal from the fire receiver, and based on the output of the detector, maintains the current setting state and discards the current setting state. A fire alarm facility comprising a setting processing means for switching.