JP3318450B2 - 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 a fire alarm system that can be operated reliably even when it is installed in a dusty environment such as a building under construction.

[0002]

2. Description of the Related Art In general, a fire alarm system provided with a receiving unit such as a fire receiver or a repeater and various terminal devices such as a fire detector connected to the receiving unit via a signal line has a problem. A pre-alarm discriminating value for issuing a fire advisory prior to the alarm is set in the receiving unit. This pre-alarm judgment value is arbitrarily set to a level (high sensitivity level) lower than a normal fire judgment value. For example, if a detection signal from an analog fire detector exceeds this fire judgment value, A fire advisory will be issued indicating that a fire situation is approaching. Then, an observer such as a disaster prevention center can check the situation of the fire occurrence earlier than performing a normal fire operation.

[0003]

By the way, in the case of the conventional fire alarm system as described above, when a building or the like provided with such a fire alarm system is under construction or renovation, dust and radiation due to the construction are generated. Fire detectors often malfunction due to heat or the like, or even when smoke is used at some event, etc., nearby fire detectors often malfunction,
In particular, when an alarm is issued at a level lower than the normal fire discrimination value as described above in an analog system, etc., the detection signal from the fire detector is pre-alarm discriminated by a little dust etc. The fire alarm is frequently issued during construction and the like. Also,
It is very troublesome to restore the pre-arm successively when such a fire warning is issued during construction, etc., especially when the building is large and many main repeaters are installed. There was a problem that much time and labor were required.

The present invention has been made in order to solve such a problem, and it is an object of the present invention to provide a fire alarm system capable of preventing an inadvertent fire alarm due to dust or the like. Aim.

[0005]

SUMMARY OF THE INVENTION A fire alarm system according to the present invention includes various terminal devices and a receiving unit connected to the terminal devices via a signal line for receiving information related to fire. A fire alarm system capable of setting a first mode and a second mode as modes, for issuing a fire based on information related to a fire from a terminal device and for setting a fire
It is provided with a discriminating means for discriminating for issuing a disaster warning ,
Fire warning in the discriminating means by setting the second mode
The pre-alarm judgment value for issuing a
This is set to be higher than the pre-alarm judgment value . The first mode is a normal mode for performing a normal operation, and the second mode is a construction mode for operating during construction of a building. Also, the fire discrimination level is a pre-alarm discrimination value for issuing a fire advisory, and this pre-alarm discrimination value is set to a value lower than the fire discrimination value for issuing a fire. .

[0006]

According to the present invention, the pre-alarm judgment value in the construction mode operating during the construction of a building or the like is set higher than the pre-alarm judgment value in the normal mode, so that a fire warning is frequently issued during the construction or the like. Reporting can be prevented, and the complexity of the recovery work can be reduced.
Further, since the pre-alarm judgment value is set near the fire judgment value while keeping the fire judgment value as it is, the original fire detection function can be maintained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a 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 denotes a fire receiver as a fire receiving unit.
To 4 are connected. The fire receiver 1 and the main repeaters 2 to 4 are connected to a main loop signal line 5 for transmitting signals in one direction.
And a sub-loop signal line 6 for transmitting a signal in the other direction.
Are connected in a loop by two signal lines, each of which comprises a pair of signal lines.

[0008] Controlled devices and the like are connected to the main repeaters 2 to 4 via various sensors and ordinary repeaters. Here, for example, the monitoring repeater 11, the control repeater 12, the gas leak repeater 13, the analog fire detector (photoelectric,
Ionization type, thermal type, etc.) 14, display 15, normal type smoke detector 21, differential type sensor 22, constant temperature type sensor 23, terminator 24, district sound device (district bell) 25, transmitter 26 ,
The figure shows a case where controlled devices 31, such as a fire door closing device and a smoke exhaust damper opening device, and a gas leak detector 41 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. , A return signal, and other various signals are transmitted. In this case, the same signal always flows through 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 receive the signal 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 a 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 is lost due to an abnormality such as a disconnection, the signal received on the sub loop signal line 6 is taken into the fire receiver 1 and the signal processing unit inside the main repeaters 2 to 4.

With this configuration, normally, the main loop signal line 5
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, return the result 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 configuration diagram showing an example of a specific circuit configuration of the fire receiver and the main repeater used in FIG. Here, a fire receiver 1 and one main repeater 2 of a plurality of main repeaters connected to the fire receiver 1 are shown, and the main repeater 2 includes a monitoring repeater. 11, control repeater 12, analog fire detector 14, normal type smoke detector 21, differential detector 22, district acoustic device 25,
It shows a case where various devices such as a controlled device 31 such as a fire door closing device and a smoke exhaust damper opening device are connected.

The fire receiver 1 includes a microprocessor (hereinafter, referred to as an MPU) 100 as a discriminating means for performing various arithmetic processes, and a ROM 102 and an EEPROM 103 connected to the MPU 100 via a bus 101, respectively.
And a RAM 104 and a MPU 100 via a bus 101 and an interface (hereinafter referred to as an IF) 105, and a parallel / serial converter, a transmitter, a receiver, and a serial converter for transmitting and receiving information to and from the main repeater 2. A transmitting / receiving unit 106 having a parallel converter (both not shown) and the like;
The MPU 100 is connected to the MPU 100 via a bus 101 and an IF 107, and displays a status by an LED (not shown), an LCD, and the like.
Display unit 108 for performing detailed display or the like using (not shown)
And an operation unit 110 connected to the MPU 100 via the bus 101 and the IF 109 and having various switches.

The ROM 102 stores in advance programs related to a flowchart as shown in FIG. The EEPROM 103 is a non-volatile memory that can be written and erased electrically, and sets items such as the addresses (serial number, building, floor, district, and number) of the main repeater and terminal equipment and the type name of the terminal equipment in advance. Is stored.
The RAM 104 includes a work area 104a used when the MPU 100 performs various arithmetic processing and the like, and a storage area 104 for storing various data to be sent to the main repeater.
b.

The main repeater 2 includes an MPU 200 as a discriminating means for performing various arithmetic processing, and ROMs 202 and EE connected to the MPU 200 via a bus 201, respectively.
The PROM 203 and the RAM 204, and the MPU 200 via the bus 201,
And 209, which are connected via the transmission / reception units 206, 208 and 2 respectively.
And 10.

The ROM 202 stores in advance programs related to a flowchart as shown in FIG. The EEPROM 203 is an electrically writable and erasable non-volatile memory. The addresses (serial number, building, floor, district, and number) of the main repeater and the terminal device, the terminal device type name, and the fire discrimination value are stored. Setting items such as a pre-alarm determination value and the like are stored in advance. Also, RAM
204 includes a work area 204a used when the MPU 200 performs various arithmetic processing and the like, and a storage area 204b for storing various data and the like to be sent to a fire receiver or the like. Note that the configuration of the main repeater is
4 is also the same as that of the main repeater 2.

Next, the operation will be described with reference to FIGS. First, the operation of the fire receiver 1 will be described with reference to FIG. Basically, the fire receiver 1 collects information by calling the main repeaters 2 to 4 that are always connected by loop wiring sequentially and cyclically in accordance with addresses.
When there is an operation input, a necessary operation according to the input is performed. The determination in the following operation description is all performed by the MPU 100. In step S1, R
Initial settings are made for the AM 104, the IFs 105, 107, 109, etc., and the processing operations described below are sequentially performed on 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, and in step S3, only one is incremented, 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 S1 to be described later is performed.
Proceed to 3 and if there is an input, proceed to step S5. In step S5, the input from the operation unit 110 is, for example, whether or not the setting of the construction mode as the second mode indicating that the building or the like where the fire alarm system is installed is under construction. Is determined, and if the execution mode is set, in step S6, the storage area 1 of the RAM 104 is determined.
In step S7, the execution flag is set to a predetermined area in the predetermined area 04b, and an execution mode setting command is transmitted to the required main repeater (RP) via the transmitting / receiving unit 106 in step S7.

In step S5, it is not the setting of the construction mode, that is, it is an input other than the setting of the construction mode, and in step S8, whether the input from the operation unit 110 is to cancel the construction mode or not. Is determined, and if the execution mode is canceled, that is, if the normal mode is selected as the first mode, the execution flag of the predetermined area of the storage area 104b of the RAM 104 is turned off in step S9, and the necessary main Repeater (RP)
A command for canceling the construction mode is transmitted via the transmission / reception unit 106 to the communication unit.

In either case of sending the construction mode setting command or sending the construction mode cancel command, in step S11, it is determined whether or not there is a response signal of the main repeater that has sent the command. Wait until there is a response signal, and when there is, proceed to step S13. If there is no response signal, it is considered that the main repeater that sent the command is abnormal, and a display to that effect is made on the display unit 108, and the process proceeds to step S13. I'm trying to do it. If the construction mode is not canceled in step S8, a process according to other inputs is performed in step S12. For example, as other inputs, for example, a recovery input, various test inputs, and other mode setting inputs can be considered. Also in the case of this other processing, the process proceeds to step S13 after the processing operation. here,
In steps S7 and S10, the necessary main repeaters are usually set to all the main repeaters, and when a range is specified, only the main repeaters in the range can be set. For this range designation, the address of each main repeater is used.

In step S13, the corresponding n-th main repeater is called to read the state information.
Then, in step S14, it is determined from the read state information whether or not a fire has occurred, that is, whether or not a fire signal has been included. If a fire has occurred, in step S15, a necessary process associated with a necessary fire operation is performed. If it is not a fire, a process according to other information is performed in step S16. The fire operation in step S15 includes, for example, sound sound, fire notification, interlocking operation, display control, and the like. When the processing in step S15 or S16 is completed, it is determined in step S17 whether or not the last N-th main repeater is present.
And the above operation is repeated. When the processing of the last Nth 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. These main repeaters 2 to 4 basically call various terminal devices connected via signal lines sequentially and cyclically in accordance with addresses to collect information, and receive instructions from the fire receiver 1. And perform necessary operations according to the instruction. The determination in the following description of the operation is all performed by the MPU 200. In step S21, the RAM 204, the IFs 205, 20
7, 209, etc., and the operation of storing the contents of the EEPROM 203 in the storage area 204b of the RAM 204 for each main repeater.

Next, 1 connected to the fire receiver 1
The processing operation described below is performed for the main repeaters No. to K. The operation of a specific main repeater, for example, the first main repeater will be described. It is assumed that K terminal devices from No. 1 to No. K are connected to the first main repeater. Therefore, in the first main repeater, the k-th (k = 1 to k)
The operation of the terminal device of K) will be described.
In step 22, k representing the number of each main repeater is set to 0, and in step S23, only one is incremented. In step S24, a polling signal from the fire receiver 1 is received to determine whether or not there is a call. I do.

If there is no call from the fire receiver 1, the process proceeds to step S32, and terminal devices are sequentially and cyclically called to collect status information as described later. If there is a call from the fire receiver 1, step S25 is performed. Proceed to. In step S25, it is determined whether or not the command is a return command related to status information that is constantly and cyclically collected from the fire receiver 1. If the command is a return command, the process returns to step S26 in the storage area 204b of the RAM 204. The status information of the terminal device, such as a normal status, a fire status, a pre-alarm status, and the like for each address, is transmitted via the transmission / reception unit 206 to the fire receiver 1.
Send to If it is not the return command in step S25, it is determined in step S27 whether or not the command is for setting the construction mode from the fire receiver 1. If the command is for setting the construction mode, in step S28, the storage area 204b of the RAM 204 is determined. Is set to ON in the predetermined area, and a response signal to the setting command of the construction mode is transmitted to the fire receiver 1 via the transmission / reception unit 206.

In step S27, if it is not a command to set the construction mode, in step S29, it is determined whether or not the command is a command to release the construction mode from the fire receiver 1. If it is a command to release the construction mode, step S30. In, RA
The construction flag F set in a predetermined area of the storage area 204b of M204 is turned off, and a response signal to the construction mode release command is sent to the fire receiver 1 via the transmission / reception unit 206. If it is not an instruction to release the construction mode in step S29, a necessary processing operation according to other instructions is performed in step S31. When the processing operations in steps S26, S28, S30 and S31 are completed, the process proceeds to step S32.

In step S32, the k-th terminal device is called, and its state information is read.
4 is stored in a predetermined area of the storage area 204b. And
In step S33, the called terminal device is EE
From the terminal types set in the PROM 203, it is determined whether or not it is an analog fire detector. If the fire detector is a fire detector, it is stored in a predetermined area of the storage area 204b of the RAM 204 in step S34. It is determined whether the construction flag F in the state information is ON or OFF. And if the construction flag F is ON, in step S35,
It is determined whether or not the analog value SL of the fire detector is equal to or greater than LV-1, that is, the pre-alarm determination value PL is set to a value one step lower in analog resolution than the fire determination value LV. In other words, the sensitivity reduction operation from the fire receiver 1 substantially raises the pre-alarm judgment value of the corresponding fire detector to near the fire judgment value.

If the construction flag F is OFF in step S34, the normal mode other than the construction mode is set.
In S36, it is determined whether or not the analog value SL of the fire detector is equal to or greater than the pre-alarm determination value PL. Then, the analog value SL of the fire detector is equal to or greater than LV-1 in step S35, or the analog value SL of the fire detector is
If the value is equal to or greater than the pre-alarm determination value PL in Step S36, it is determined in Step S37 whether or not the analog value SL of the fire detector is equal to or greater than the fire determination value LV. If the status information from the sensor is a fire, it is stored in a predetermined area of the storage area 204b of the RAM 204. If not, in step S39, the status information from the k-th fire sensor is not a fire,
The pre-alarm state is stored in a predetermined area of the storage area 204b of the RAM 204. Here, the pre-alarm discrimination level in the construction mode is set to LV-α (α is 1), but may be set to PL + α, as long as it is higher than the pre-alarm discrimination value PL. In addition, the construction mode pre-alarm discrimination value may be stored in the same manner as the fire discrimination value LV and the pre-alarm discrimination value PL for each analog fire detector 14, but when calculated, the set data amount is small. Become.

On the other hand, when the analog value SL of the fire detector is LV
Not greater than -1 or the analog value S of the fire detector
If L is not equal to or greater than the pre-alarm determination value PL, in step S40, the content related to the k-th fire detector is cleared. If it is determined in step S33 that the called terminal device is not a fire detector, a processing operation according to another type is performed in step S41. In addition,
In step S40, the content of the fire detector of the k-th may not be cleared but may be held by itself. In such a case, upon receiving a recovery command from the fire detector, the contents are cleared. Then, these steps S38 to S41
When the processing operation in is completed, any of the steps S42
Proceed to. In step S42, it is determined whether or not the terminal device is the last K-th terminal device.
23, the above operation is repeated, and when the processing of the last K-th terminal device ends, the process returns to step S22, where k is set to 0 to prepare for the next call.

As described above, in this embodiment, in the construction mode during construction of a building or the like, the value is set to be higher than the pre-alarm judgment value in the normal mode other than the construction mode. Frequent fire alerts are prevented. Also, the fire discrimination value may be increased in the construction mode similarly to the pre-alarm discrimination value, but by leaving it as it is, the original fire function detection is maintained, and at that level, even if false reports frequently occur, It is often the case that an alarm is issued to operate the present apparatus, and the present fire can be confirmed.

Although the above embodiment has been described with reference to the case where the fire is determined by the main repeater, the fire may be determined by the fire receiver. In that case, fire receiver,
The functions shown in steps S22, S23, S32 to S42 in FIG. 4 may be provided. Further, in the above embodiment, the case of a fire detector as a terminal device for collecting status information connected to the main repeater has been described. However, as a detection target, for example, smoke, heat, Any fire detector may be used as long as it transmits physical quantity (analog quantity) information such as flame light, gas or odor to a receiver such as a fire receiver or a repeater.

[0030]

As described above, according to the fire alarm system of the present invention, there are provided various terminal devices and a receiving unit which is connected to the terminal devices via signal lines and receives information related to fire. And a fire alarm device capable of setting a first mode and a second mode as operation modes, for issuing a fire based on information related to a fire from a terminal device .
And a discriminating means for discriminating a fire advisory, and the setting of the second mode causes a fire in the discriminating means.
Since the pre-alarm judgment value for issuing a warning is set higher than the pre -alarm judgment value in the first mode, it is possible to prevent a malfunction related to a fire during operation in the second mode, and to recover the malfunction. There is an effect that complexity of work can be eliminated.

Further, since the first mode is a normal mode for performing a normal operation, and the second mode is a construction mode for operating during construction of a building, etc., erroneous operation related to fire frequently occurring during construction or the like is prevented. And the complexity of the recovery work can be reduced.

Further, since the level for judging a fire is a pre-alarm judgment value for issuing a fire advisory, it is possible to prevent a fire advisory from being issued frequently during construction or the like, and to recover the fire alarm. The complexity of work can be eliminated, and the pre-alarm judgment value is set near the fire judgment value for issuing a fire, and the fire judgment value is kept as it is, so that the original fire detection function can be maintained. effective.

[Brief description of the drawings]

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

FIG. 4 is a flowchart for explaining the operation of one embodiment of the fire alarm system according to the present invention.

[Explanation of symbols]

 DESCRIPTION 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 Transmission / reception part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G08B 17/00 G08B 25/00 510

Claims (3)

(57) [Claims] 1. A terminal device connected to a terminal device via a signal line for receiving information related to a fire, wherein a first mode and a second mode are set as operation modes. A possible fire alarm system, based on information related to the fire from the terminal equipment described above.
The includes a discriminating means for discriminating for alarm and for fire warnings to alarm, the upper in the judgment means according to the setting of the second mode
A fire alarm system characterized in that a pre-alarm judgment value for issuing a fire alarm is set higher than a pre-alarm judgment value in the first mode. 2. The fire alarm system according to claim 1, wherein the first mode is a normal mode for performing a normal operation, and the second mode is a construction mode for operating during construction of a building. The pre-alarm determination value according to claim 3 wherein said second mode, a fire alarm system according to claim 1, wherein the set in the vicinity of the fire discrimination value for alarm fire.