JP2817919B2 - Fire alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention comprises a receiving unit such as a receiver or a repeater, and a plurality of fire detectors connected to the receiving unit. The present invention relates to a fire alarm device that determines a fire by detecting a physical quantity based on a fire phenomenon such as the above.

[Related Art and Problems] Generally, in a fire alarm device, when a fire detector operates, it is checked whether or not the operation is due to a true fire. Then, after it is recognized that it is not a fire abnormality, that is, it is a false report, or after it is confirmed that the cause of the fire abnormality has been extinguished, the fire is restored to return to the normal monitoring state.

However, even if a smoke detector or the like performs an operation for restoring a fire on the assumption that the smoke has disappeared, the smoke still exists in the detector, and it often starts operating again. Also,
In a fire detector on-site fire test, smoke is actually generated and the detector is operated, so even if the test is completed, smoke does not easily come out of the detector and it will operate again even if the fire is restored There was a disadvantage.

[Means for Solving the Problems] Accordingly, an object of the present invention is to provide a fire alarm device in which a receiving unit such as a receiver or a repeater determines a fire based on detection data detected by a fire detector. When a sensor that fired beyond the reference level is fired, the fire operation is released, but the fire detector is not operated for a predetermined period of time for the applicable fire sensor. It is to provide a fire alarm device.

To this end, according to the present invention, the fire detector for outputting a physical quantity signal, that the detection data of a fire phenomenon includes a fire phenomenon detecting means (FS) and (DE ₁ ~DE _N), the fire detector Receiving unit (R) provided with a fire determining means (ROM22, step 307) for receiving the physical quantity signal from
E), the receiving unit includes: a recovery target storage unit (RAM21) that stores at least a fire detector that has transmitted a physical quantity signal determined to be a fire; and a recovery target storage unit when a recovery operation is performed. And a recovery means (RAM22, RAM23, steps 311 to 318) for prohibiting the fire discrimination operation for the physical quantity signal from the fire detector stored in or the physical quantity signal itself for a predetermined time. An apparatus is provided.

Another object of the present invention is to provide a fire alarm device in which a fire detector performs a fire determination and sends the result to a receiving unit such as a receiver or a repeater.
An object of the present invention is to provide a fire alarm device that only cancels a fire when a fire recovery command is sent from a receiving unit after a fire operation and does not perform an operation related to detection of a fire phenomenon for a predetermined time.

In order to achieve this object, according to the present invention, a plurality of fire detectors (DEs) each including a fire phenomenon detecting means (FS), a fire determining means (step 406), and a fire signal transmitting means (TRX1, step 407). _{1 ~DE N),} and the fire alarm device having a reception unit (RE) for receiving a fire signal sent from the fire detector, the receiver, a recovery signal sending means for sending a recovery signal during the recovery operation Each of the fire detectors includes: a recovery signal reception determining unit (step 401) that determines whether a recovery signal transmitted from the receiving unit has been received; and the recovery signal determination unit determines reception of the recovery signal. At this time, the fire signal transmitting means is restored, and the fire discriminating operation of the fire discriminating means or the reading of the detection output of the fire phenomenon detecting means itself is prohibited for a predetermined time (steps 402, 404, 408), and a fire alarm device is provided.

[Operation] In the case where the receiving unit has a fire discriminating means and the physical quantity of the fire phenomenon is collected from the analog fire detector,
When the recovery operation is performed, the operation related to the fire detection for the fire detector is prohibited for a predetermined time, and the fire detector has a fire determination unit and sends an on / off fire signal to the receiving unit. In the case of a configuration, when the fire sensor receives a restoration command from the receiver, the operation related to fire discrimination is prohibited for a predetermined time, and in either case, the restored fire sensor or the receiver detects the fire phenomenon detection unit. It is possible to prevent the fire operation immediately from being performed again due to the remaining fire phenomenon.

[Example] FIG. 1 is a present invention is a block circuit diagram showing an embodiment when applied to a fire alarm system analog, in FIG, RE receiver, DE ₁ ~DE _N, for example A plurality of analog fire detectors connected to the receiver RE via a transmission line L such as a pair of power / signal lines. Although shows the internal circuit in detail only the fire detector DE _1, other fire sensor also has the same internal configuration.

In the fire detector DE ₁ , MPU1 is a microprocessor, ROM11 is a program storage area, RAM11 is a work area, FS is a thermal type, smoke type (scattered light type, dimming type, ionization type), gas type , Or an optical (radiant) detection unit, and a fire phenomenon detection means having an amplifier, a sample-and-hold circuit, an analog-to-digital converter, etc., DIP is a dip switch for self-address setting, and TRX1 is an ordinary・ Serial converter, sending circuit, receiving circuit, direct
A transmission / reception unit having an array converter and the like.

In the receiver RE as a receiving unit, the MPU 2 is a microprocessor, the ROM 21 is a program storage area, the ROM 22 is a terminal address and a storage area for a fire determination reference such as a fire determination level, and the RAM 21 is a fire determination The storage area of the operation sensor for storing the number (for example, address) of the fire detector that has detected the physical quantity of the fire phenomenon that has reached level A, the RAM 22 is a storage area for the number of the sensor being restored, and the RAM 23 is a timer for the timer. The storage area, the RAM 24, the work area, and OP are an operation section provided with various switches such as a recovery switch, DP is a display section, and TRX2 is a transmission / reception section similar to TRX1.

FIGS. 2 and 3, respectively shown in FIG. 1 is a flow chart for explaining the operation of the analog type fire detector DE ₁ ~DE _N and the receiver RE, the second figure the storage area ROM11
3 (1) and 3 (2) show an example of a program stored in the storage area ROM21.

As shown in FIG. 3 (1), in the receiver RE, 1
Polling is sequentially performed from the No. fire detector to the Nth fire detector (steps 301, 302, 301). In the polling operation for the n-th fire detector (n = 1 to N), first, the n-th fire detector DE which is about to perform the polling now
It is determined whether or not n is being restored, that is, whether or not n is stored in the storage area RAM 22 that stores the fire detector that is being restored. If it is being restored (Y in step 303), The polling is not called for the nth fire detector DEn, and the process goes to the next fire detector via step 310.

If recovery is not in progress (N in step 303), the address of the n-th fire detector and the data return command are set in the interface IF21 and transmitted from the transmission / reception unit TRX2 to the transmission line L (step 304).

As shown in FIG. 2, if a signal has been received from the fire detector DE ₁ ~DE _N in the receiver RE (Y in step 201), it is determined whether or not a self address ( Step 202). In the n-th fire sensor DEn, if it is determined in step 304 of FIG. 3A that the data return command sent from the receiver RE is for its own address (Y in step 202), the interface IF11.
The detection data SLV is read from the fire phenomenon detection means FS via the interface (step 203), and the detection data SLV is set in the interface IF13 to be sent back to the transmission line L from the transmission / reception unit TRX1 in order to return it to the receiver RE ( Steps
204).

On the receiver RE side, if there is a return from the nth fire detector DEn, that is, if the detection data sent out on the transmission line L from the nth fire detector DEn in step 204 of FIG. 2 is received (Y in step 305), the detection data SLV
Is read from the interface IF212 (step 306),
It is compared with the fire discrimination level or fire discrimination criterion A (step 307). As a result of the comparison, if it is determined that the detection data SLV is smaller than the fire determination level A (step
N) of 307, the operation goes to the next fire detector via step 310 without performing the operation such as fire display.

If it is determined that the detection data SLV is equal to or higher than the fire determination level A (Y in step 307), the nth fire sensor is determined to be a fire detecting sensor, that is, an operation sensor, and n is set to the interface IF23. And displays it on the display unit DP as the motion sensor number (step 30).
8) Similarly, n is stored in the storage area RAM 21 of the motion sensor as a motion sensor number (step 309). The display section DP may display a fire occurrence area. After the display operation on the display unit DP and the storage operation in the storage area RAM 21, the process goes to the fire sensor of the next number via step 310.

When it is determined that the operations of steps 303 to 309 have been completed for all of the N fire sensors in this way (Y in step 310), the process returns to the beginning and the polling operation from the first fire sensor is started. Before the operation, the operation of the restoration process shown in FIG. 3 (2) is performed.

In the operation of the recovery process, first, the interface IF
22 is read (step 311), and at the same time the interface IF22 is cleared. From the read contents of the interface IF22, the state of the operation unit OP unit,
That is, it is determined whether or not a recovery switch (not shown) provided in the operation unit OP is turned on. If the recovery switch has not been turned on yet (N in step 312), step 301 is performed.
And the polling from the first fire detector is restarted.

For example, when the environmental conditions return to normal, the recovery switch provided on the operation unit OP is operated by an operator or the like in order to recover the operation sensor stored in the storage area RAM21. Is determined from the contents of the interface IF22 (Y in step 312), after the contents of the interface IF22 are cleared, the contents of the storage area RAM21 are stored in the storage area RAM22 of the recovering sensor. (Step 313). After the timer variable t is set to t = T in the timer storage area RAM23 (step 314), the contents of the interface IF23 are cleared and the contents of the storage area RAM21 are cleared to clear the display on the display unit DP. (Step 31
Five).

Thereafter, the process returns to the beginning via steps 316 and 317, and the polling operation from step 302 is performed. Each time one cycle of polling ends, that is, polling from the first fire sensor to the Nth fire sensor is performed. Each time the processing is completed (Y in step 310), the value of t is decremented by one in step 316. This is because the judgment in step 312 is that the acknowledgment, that is, the restoration command is given only once,
This is because Steps 313 to 315 are skipped since the interface IF22 has not been cleared, that is, there is no restoration instruction after the first time.

Until the value of t is decremented one by one in step 316 and t = 0 is determined in step 317, in each polling cycle, it is determined whether or not each fire detector is recovering. Is determined from the contents of the storage area RAM 22 in step 303, so that the polling operation is not performed for the fire detector determined to be recovering.

Thereafter, when it is determined that t = 0 (Y in step 317), the contents of the storage area RAM 22 are cleared (step 3).
18) Return to normal monitoring.

In the above embodiment, when it is determined in step 303 that recovery is being performed, a case is described in which the data return command is not sent to the fire detector. It will be readily apparent to those skilled in the art that any changes can be made, such as collecting the data from the tentatively and not performing the fire discrimination in step 307.

Further, in the above embodiment, the fire detector is an analog fire detector that sends out a physical quantity signal of the detected fire phenomenon, and the receiver or the receiver of the repeater or the like sends out the analog fire detector from the analog fire detector. A case has been described where the present invention is applied to a so-called analog fire alarm device that performs a fire determination based on a physical quantity signal. However, the fire detector itself performs a fire determination and sends a fire signal and / or an address signal to a receiver. It is also possible to apply the present invention to a normal on / off type fire alarm device that is designed to send out.

In this case, each fire detector is provided with a ROM or a switch for storing the fire discrimination criterion A and a RAM for the timer, and the program storage area ROM 11 is, for example, as shown in the flowchart of FIG. A program as shown is stored.

In FIG. 4, it is determined whether or not a restoration instruction is first received from the receiver RE (or the time t of the timer RAM is t = 0).
Is determined (step 401), and if not received, the detection data SLV is read from the fire phenomenon detection means FS at predetermined time intervals (step 403) (step 4).
05) A fire determination is performed (step 406). If a fire is detected, an address and a fire signal are set in the interface IF13 and transmitted to the receiver RE (step 407). When the fire detector detects the occurrence of a fire and sends a fire signal to the receiver RE, and subsequently receives a restoration command from the receiver RE (Y in step 401), first, the interface IF13
Is cleared, and then time t = T is set in the timer RAM (step 402). This t is decremented by one at every predetermined time interval (step 408). Until it is determined that t = 0 (step 404), the detection data SLV is read from the fire phenomenon detection means FS. Is not done.

Here, the flowchart of FIG. 4 shows that the detection data SLV from the fire phenomenon detection means FS is not read, but the reading is performed so that the fire determination in step 406 is not performed. You can also

[Effects of the Invention] As described above, according to the present invention, when the fire operation is restored, the operation relating to the fire discrimination is prohibited for a predetermined time, so that the problem of restarting immediately after the restoration is solved.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing a fire alarm device according to one embodiment of the present invention, and FIG. 2 is a fire detector DE _{1 to} D of FIG.
Flowchart for explaining the operation of each of E _N ,
(1) and (2) are flowcharts for explaining the operation of the receiver RE in FIG. 1, and FIG. 4 is a flowchart for explaining another embodiment of the present invention. In FIG, RE receiver, DE ₁ ~DE _N is a fire detector of the analog type,
FS is a fire phenomenon detection means, TRX1 is a transmission / reception unit, ROM22 is a storage area of a terminal address and a fire determination reference, RAM21 is a storage area of an operation sensor, RAM22 is a storage area of a recovery sensor, R
AM23 is a timer storage area, OP is an operation unit provided with various switches such as a recovery switch, etc., DP is a display unit, and TRX2 is a transmission / reception unit.

Claims (2)

(57) [Claims] A plurality of fire sensors provided with fire phenomenon detection means for outputting a physical quantity signal of a fire phenomenon, and fire judgment means for receiving the physical quantity signals from each of the plurality of fire sensors and judging a fire. A fire alarm device having a receiving unit, wherein the receiving unit is configured to store at least a fire sensor that has transmitted a physical quantity signal determined to be a fire signal in a recovery target storage unit; A fire alarm device comprising: a fire discriminating operation for a stored physical quantity signal from a fire detector or recovery means for prohibiting reception of the physical quantity signal itself for a predetermined time. 2. A fire alarm apparatus comprising: a plurality of fire detectors provided with fire phenomenon detecting means, fire discriminating means, and fire signal transmitting means; and a receiving unit for receiving a fire signal transmitted from the fire detector. The receiving unit includes a restoration signal sending unit that sends a restoration signal at the time of a restoration operation, and each of the fire detectors determines whether or not the restoration signal sent from the receiving unit has been received. When the recovery signal determining means determines that the recovery signal has been received, the fire signal transmitting means is recovered, and the fire determining operation of the fire determining means or the reading of the detection output of the fire phenomenon detecting means itself is performed. A fire alarm device, comprising: recovery means for prohibiting the operation for a predetermined time.