JP2883112B2 - Storage type fire alarm - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a storage-type fire alarm device.

[Prior Art] For example, in the case of a fire detection unit such as a smoke detector that monitors a fire by detecting smoke, a malfunction such that a fire occurrence information is erroneously output due to a transient smoke such as a cigarette may occur. To prevent this, the fire detection unit does not immediately output fire occurrence information when detecting a fire, but outputs fire occurrence information when the fire detection unit detects a fire for a predetermined time or a predetermined number of times. Storage fire alarms are known.

In these fire alarm devices, for example, a fire detection unit is connected to a reception unit, and only when the fire detection unit determines that a fire has occurred, the fire occurrence information is sent to the reception unit and the reception unit performs an accumulation operation. Fire alarm device,
A so-called analog fire alarm device, in which the receiving unit periodically collects analog data as fire occurrence information from the fire detecting unit and causes the receiving unit to perform an accumulation operation based on the collected analog data, is there.

[Problems to be Solved by the Invention] The present invention is intended to be applied to such a type of fire alarm device that performs a storage operation in a receiving unit. Conventionally, a fire alarm device is generally of a so-called wired type in which a receiving unit and a fire detecting unit are connected by a power / signal transmission line, but an object of the present invention is to use a wireless type such as a wired type or a wireless type. Regardless, an object of the present invention is to provide a storage-type fire alarm device suitable for performing fire monitoring.

In general, in the case of a wired system, the power for the fire detection unit is supplied via a power / signal transmission line, but in the case of a wireless system, that is, the information signal transmitted from the fire detection unit to the reception unit is spatially limited such as an optical signal. In the case of a transmitted signal, the storage operation is performed, for example, measures against light path interruption due to smoke or the like in the event of a fire, and measures for extending the life of the built-in battery, for example, since the internal battery is used because there is no power line. It is desirable to provide an optimal device that is comprehensively taken into consideration in performing the operation.

[Means for Solving the Problems] Specifically, according to the present invention, a fire phenomenon detecting means for performing fire monitoring in a first cycle and outputting a fire detection signal every time a fire state is detected, A normal signal output means for outputting a normal signal in a second cycle when the fire detection unit does not detect any abnormality, including when the fire phenomenon detection means does not detect a fire, and the fire phenomenon detection means Is activated every time the fire detection signal is output, and when the fire phenomenon detection means stops outputting the fire detection signal, the time is detected after a lapse of a first predetermined time longer than the first cycle of the fire monitoring. A first timing means for outputting a normal signal after being up, and transmitting an information signal including a fire detection signal obtained from the fire phenomenon detecting means and a normal signal obtained from the first timing means and the normal signal output means. Detecting means for transmitting the information signal transmitted from the detecting means transmitting means of the fire detecting section, and a receiving means for receiving the information signal transmitted from the detecting means transmitting means of the fire detecting section; Activated when the means first receives the fire detection signal, cleared when the normal signal is received,
When the second predetermined time indicating the accumulation time elapses without being cleared, the time is up and the fire occurrence information is output, and the receiving unit for the receiving unit receives one of the information signals. The third method is to restart when each of the information signals has not been received for a third predetermined time longer than the second period and output a transmission abnormality signal. A storage type fire alarm device is provided, comprising: a receiving unit having a time measuring unit.

According to a more preferred aspect of the present invention, the receiving unit further includes a counter that counts the number of times the fire detection signal is received during activation of the second timing unit, whereby the count value of the counter is calculated. Is reached a predetermined number of times, the fire occurrence information is output even before the second timing means times out.

According to a further preferred aspect of the present invention, when the second clock means or the counter outputs the fire occurrence information, the third clock means is prohibited from outputting the transmission abnormality signal. I have to.

[Operation] An information signal including a normal signal obtained in the second cycle is transmitted from the normal signal output unit from the detection unit transmission unit of the fire detection unit when the fire state is not present, and the fire state is detected. Is transmitted by the fire phenomenon detecting means in the first cycle, and a normal signal is output when the fire state is eliminated.

In the receiving unit, when the fire detection signal is received for the first time, the second time counting means is started to start counting the accumulation time, and if the normal signal is not received during the operation, the time is up after the accumulation time elapses. In addition to outputting fire occurrence information, a transmission abnormality signal is output when none of the information signals is received from the fire detection unit for a third predetermined time longer than the second cycle.

In this manner, the reception unit receives the information signal from the fire detection unit at least once within the third predetermined time if there is no transmission abnormality. Therefore, the information signal from the fire detection unit is transmitted over the third predetermined time. It is possible to know the transmission error by detecting that the signal has not been received, and when a fire occurs, the time is up and the fire occurrence information is output unless a normal signal is received. Even when the transmission path is interrupted, that is, when the transmission path is interrupted due to, for example, thermal disconnection of the transmission path in the case of a wired system, or in the case of a wireless transmission path, the transmission path is interrupted due to, for example, the filling of smoke. Even if the fire is detected, the fire occurrence information is generated on the receiving unit side and it is notified that the fire has occurred.Therefore, reliable fire monitoring is performed while monitoring transmission path abnormalities. Alarm device is obtained.

The present invention as described above is applicable regardless of whether the signal transmission path between the fire detecting unit and the receiving unit is a wired type or a wireless type.

Also, according to a preferred aspect of the present invention, during a fire condition,
When the number of receptions of the fire detection signal by the receiving unit reaches a predetermined number, it is determined that the fire occurrence is high even before the second predetermined time indicating the accumulation time has elapsed, and the fire occurrence information is output. I have to.

Note that the present invention can be more effectively applied when the information signal transmitted from the fire detection unit to the reception unit is a spatially transmitted signal such as an optical signal.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an internal circuit of a sensor unit (fire detection unit) 10 which performs fire detection and transmits fire information, and FIG.
2 shows an internal circuit of a controller (receiving unit) 20 that receives information transmitted from the sensor unit 10.

The sensor unit 10 converts fire information and other information detected based on heat, smoke, and the like into a light signal in the infrared region via the light emission control circuit 102 and spatially transmits the light signal from the light emitting diode LED10.

The controller 20 receives information such as a fire signal from the sensor unit 10 via the photodiode PD20 and the light receiving circuit 202, performs various determinations, displays the determination results, and the like, and displays the received content and the determination results. Is notified or notified to the monitoring panel by telephone transmission via a telephone transmission terminal and a telephone line such as an extension as necessary, or is notified by wire or wireless to a fire receiver or the like in the disaster prevention center.

As a preferred embodiment, a case where fire information is wirelessly notified or transmitted by an infrared light signal will be described. However, this is merely for the purpose of explanation, and the present invention is not limited to an optical signal but may be a wired method. The present invention is also applicable when transmitting fire information.

In the circuit diagram of the sensor unit 10 shown in FIG. 1, MPU 1 is a microprocessor, ROM 11 is a storage area for programs, RAM 11 is a storage area for work, 101 is an optical receiving unit, ie, an optical receiving unit in the optical transmitting / receiving unit 16. A light receiving circuit 102 for receiving a light receiving signal via the diode PD10, a light emitting control circuit 102 for controlling light emission of a signal transmitted through the light transmitting unit, that is, the light emitting diode LED10 in the light transmitting / receiving unit 16, In this embodiment, a signal such as fire information encoded by pulse modulation using a carrier wave of 38 KHz is applied to near-infrared light of about 940 nm for 2-3 times.
It is to be transmitted repeatedly.

103 is a recovery circuit for restoring the fire detector 12 that has been operated once, 104 is a fire alarm detection circuit that detects when the fire detector 12 generates an alarm, and 105 is a detector abnormality detector. Fire detector 12
106 is a test circuit for testing the fire detector 12, and 107 is for detecting interruption of an optical path as a transmission path. The first one to periodically emit light from the light emitting unit LED10
Is a first timer circuit for setting a time interval of. The first time interval can be set to an appropriate time interval from about 30 seconds to about 30 minutes, but is set to 8 minutes in the present embodiment.

108, test indicator circuit which performs light emission control of the test indicator L ₁ when sensor test is performed, 109, the battery voltage monitoring circuit for monitoring the internal power supply that is, battery voltage, 110 performs the accumulation operation For this reason, the fire detector 12, which monitors the fire every 3.5 seconds, is activated or set when the first fire is detected, and a second time interval slightly larger than 3.5 seconds (4 seconds in this embodiment). ) When the timer counts up.
The second timer circuit 110 is reset every time the fire detector 12 detects a fire every 3.5 seconds to start counting from 4 seconds from the beginning, but if the fire detector 12 no longer detects a fire. 4 seconds later, the time is up, and it is possible to know that the fire condition has disappeared.

Reference numeral 111 denotes an optical transmission / reception unit 1 based on an operation signal of an installation test setting switch SW ₁ operated when the sensor unit 10 is installed.
An installation test setting circuit for emitting or receiving an optical signal for the installation test from 6 is an interface, and IF101 to IF111 are interfaces.

In the circuit diagram of the controller 20 shown in FIG. 2, the MPU 2 is a microprocessor, the ROM 21 is a program storage area, the RAM 21 is a work storage area, and the RAM 22 is a number of times a fire signal is transmitted from the sensor unit 10. A storage area for a counter for counting, 201 is an optical signal transmitting unit in the optical transmitting / receiving unit 22, that is, an emission control circuit for controlling emission of an optical signal transmitted from the light emitting diode LED 20, and 202 is an optical transmitting / receiving unit in the optical transmitting / receiving unit 22. An optical signal receiving unit, that is, a light receiving circuit that controls light reception of an optical signal received by the photodiode PD20, is also a light emitting diode L in the optical transmitting and receiving unit 22.
A burst light emitting circuit 204 for controlling light emission of a burst light signal emitted from the ED 21, for performing an accumulation operation in cooperation with the second timer circuit 110 of the sensor unit 10 after a fire is first detected. In addition, a first program timer 205, which is set at a time interval of, for example, 1 minute, cooperates with the first timer circuit 107 of the sensor unit 10 to detect an optical path interruption, for example, at 17 minutes. second program timer to be set to a time interval, 206 is a display lamp lighting control circuit for lighting control of the indicator lamp L ₂₁ ~L _29, indicator lamp L ₂₁ ~L ₂₆ is detector unit 10 here It is lit in accordance with the light information sent from the. L
₂₁ fire indicator lamp, L ₂₂ is accumulated in the indicator, L ₂₃ is the test indicator, L ₂₄ is a light path blocking indicator, L ₂₅ battery replacement indicator, L ₂₆
The sensor abnormality indicator lamp, L ₂₇ is the power indicator light L ₂₈ is Utsuriho stop indicator lamp, L ₂₉ is accumulated release indicator, and the like. Fire indicator light L
₂₁ is illuminated when the light information sent from the detector unit 10 represents the effect of the fire, that is performing the accumulation operation for monitoring the fire when accumulated in indicator L ₂₂ is turned on It is shown, and when the optical path blocking indicator L ₂₄ is lit indicating that the optical path between the detector unit 10 and the controller 20 is interrupted.

Reference numeral 207 denotes a ringing circuit for sounding the buzzer B; 208, a notification circuit for notifying a fire signal or the like to a fire receiver or a telephone transmission terminal; and 209, a fire receiver or a telephone transmission terminal or the like. A data output circuit 210 for outputting data to the device, a data input circuit 210 for inputting data from a fire receiver, a telephone transmission terminal or the like, and IF201 to IF210 interfaces.

In the above configuration, a signal transmission mode will be described first. As will be described below, in the present embodiment, signals transmitted between the sensor unit 10 and the controller 20 are: fire information, inspection completion information, Abnormal information (sensor dropout information, voltage drop information, etc.), normal information, and installation test information are sent, and a burst signal is sent from the controller 20 to the sensor unit 10 as a test command. And

Such transmission information can be identified by transmitting it in the form of, for example, a 4-bit digital signal. Further, address information indicating the address of the sensor unit may be added to such information. When address information is added, each information signal can be, for example, 8-bit information of 4 bits of address information and 4 bits of information content.

Hereinafter, the operations of FIGS. 1 and 2 will be described with reference to FIGS. 3A, 3B,
This will be described with reference to the flowcharts of FIGS. 4, 5A and 5B.

FIGS. 3A and 3B are flow charts for explaining the operation of the sensor unit 10, wherein III ₁ and III ₂ of FIG. 3A are connected to III ₁ and III ₂ of FIG. 3B, respectively. Constitute one flowchart.

Initial settings are made first (step 502), and then
The process enters an interrupt waiting state (step 504).

If there is an interrupt input (step 506), it is a fire interrupt (step 508), a drop-out interrupt (step 530), a voltage drop interrupt (step 534), or a first timer interrupt (step 506). 538), light reception interrupt (step 542), second timer interrupt (step 550), installation test interrupt (step 55)
4) is determined, and after the corresponding interrupt content is processed, the process returns to the interrupt standby state.

Figure 4 and Figure 5A and Figure 5B is a flow chart for explaining the operation of the controller 20, FIGS. 5A and Figure 5B is, V of the 5A Figure 5B each V ₁ and V ₂ of Figure ₁ and
Constitute one flow by connecting the V _2.

Initially, initial settings are made in FIG. 4 (step 60).
2) After that, whether or not there is a light receiving signal (step 60)
4) A determination is made as to whether a first program timer interrupt has occurred (step 606) and whether a second program timer interrupt has occurred (step 616).

If there is a light receiving signal (Y in step 604), that is, if it is determined that the light receiving signal is received by the photodiode PD20 and that it is taken in through the light receiving circuit 202 and the interface IF 202, FIG. And the received light signal processing (step 700) shown in more detail in FIG. 5B. number 5
In the received light signal processing (step 700) in FIGS. A and 5B, the received light signal is a fire signal (step 702), an abnormal signal (step 724), a voltage drop signal (step 730),
It is determined whether the signal is a normal signal (Step 734), an inspection completion signal (Step 740), an inspection signal (Step 752), a restoration signal (Step 766), or the like.

The operation in the event that a fire, light path interruption, or the like has occurred while the sensor unit 10 and the controller 20 are waiting for an interrupt will be described below.

Fire Operation An accumulation-type operation in this embodiment when an actual fire abnormality occurs will be described.

That is, in the present embodiment, the fire detector 12 of the detector unit 10 is a scattered light type smoke detector, and includes a light emitting unit and a light receiving unit (not shown).
It emits light every 4 seconds (in this example, every 3.5 seconds), and when there is more than a specified amount of smoke, smoke is scattered by the smoke from the light emitting unit and the scattered light reaching the light receiving unit is detected. It outputs a signal. Each time a smoke detection signal is output from the scattered light type smoke detector 12, the detector unit 10
In this embodiment, the smoke detection signal is converted into an optical signal, and is sent from the light emitting diode LED 10 to the controller 20 as a fire signal.

In connection with this, the sensor unit 10 includes a second monitor for monitoring whether the fire abnormality has been eliminated and the fire detector 12 no longer outputs the smoke detection signal, that is, the fire abnormality signal.
A predetermined time, for example, 4 to 6 slightly larger than 3.5 seconds.
A second timer circuit 110 is provided which counts seconds (4 seconds in this embodiment) and times up. The second
The timer circuit 110 is reset every time a smoke equal to or more than the specified amount is detected in the detection operation every 3.5 seconds, but if the smoke equal to or more than the specified amount is not detected in the detection operation every 3.5 seconds. Time-up after 4 seconds. Due to the time-up of the second timer circuit 110, the detector section 10 sends a normal signal to the controller 20, whereby the controller 20 knows that the smoke detector 12 has no longer detected the smoke detection signal. be able to.

In the controller 20, when the smoke detection signal, that is, the fire signal is first transmitted from the sensor unit 10, the normal signal is not transmitted for a predetermined time (1 minute in this embodiment), or When a fire signal is transmitted a predetermined number of times, it is determined that a fire abnormality has occurred in any of the cases.

That is, the controller 20 is provided with a first program timer 204 which starts a counting operation upon receiving the first smoke detection signal, that is, a fire signal, and times up when one minute is counted. The program timer 204 is cleared when a normal signal transmitted from the sensor unit 10 is received. Therefore, the normal signal is sent to the controller 20 without the second timer circuit 110 time-out due to the fire detector 12 intermittently outputting the smoke detection signal for one minute. If not, the first program timer 204 times out and an abnormal fire action is taken.

As described above, when a normal signal is not generated for one minute after the reception of the first fire signal, the abnormal fire operation is performed. In the case of a signal line, a fire signal is transmitted due to burnout of the line, or in the case of optical transmission, a signal transmission path abnormality such as interruption of the optical path due to smoke or the like. Even if it does not come, a fire abnormality can be notified.

The controller 20 is further provided with a storage area RAM 22 for a counter for counting the number of times the fire signal is received after the smoke detection signal, that is, the fire signal is received first. Each time a fire signal is sent from the sensor unit, the count value is incremented by one in the storage area RAM 22 for the counter so that a fire abnormal operation is performed when the number of receptions reaches a predetermined number. I have to. For example, if the fire signal transmission cycle from the fire detector unit is 3.5 seconds and the predetermined number of counts of the counter is 11 times, it is possible to determine the occurrence of a fire in a minimum time of 35 seconds.

As described above, in the controller 20, when the first program timer 204 counts one minute of accumulation time after the first fire signal is transmitted, or when the count value of the counter storage area RAM 22 becomes a predetermined value. Is determined to be a fire abnormality in any of the cases where the temperature has reached.

Hereinafter, the fire abnormal operation will be described in more detail based on the actual operation.

First, the operation of the sensor unit 10 will be described. A fire alarm detection circuit detects that the smoke detector 12 has output a smoke detection signal due to the presence of a specified amount of smoke between a light emitting unit and a light receiving unit (not shown). If 104 is detected, a fire interrupt occurs (Y in step 508). When a fire interrupt occurs, it is determined whether or not the inspection flag is on. This inspection flag is turned on during the test as described later (step 546). Since there is no inspection flag, the inspection flag is off (N in step 510). Accordingly, a fire signal is set in the light emission control circuit 102 via the interface IF 102 (step 524), whereby a light signal indicating a fire abnormality is sent from the light emitting diode LED10 to the controller 2
Sent for 0.

When a light signal indicating a fire abnormality, that is, a fire signal is transmitted, the recovery circuit 103 is set via the interface IF103 in order to cause the fire detector 12 to perform the fire monitoring operation again after 3.5 seconds (step 526). Then, the fire detector 12 that has operated the fire is restored, and the second timer circuit 110 is set via the interface IF 110 (step 528). Finally, the first timer circuit 107 described later is reset (step 528). 520), and returns to the interrupt waiting state (step 522).

If a fire is abnormal, that is, if smoke exceeding a specified amount persists, the fire alarm detection circuit 104 detects the smoke detection signal from the fire detector 12 again after 3.5 seconds, and a fire interrupt occurs (step 508). Y), a fire signal is sent to the controller 20 (step 524), and the operation of sending the fire signal continues as long as the fire is abnormal, that is, as long as a specified amount of smoke persists. Each time the second timer circuit 110 is reset (step 528), the second timer interrupt (step 55)
0) does not occur and a normal signal is not sent to the controller 20. Then, 3.
The fire signal continues to be sent every 5 seconds, and as described above, one minute after the first fire signal is received, the controller
At 20, an appropriate fire abnormal operation is performed, such as determining that an actual fire has occurred and issuing a fire alert.

However, if the fire abnormal state disappears on the way, no fire interruption by the fire alarm detection circuit 104 occurs, and the second timer circuit 110 is not set or reset, so that the second predetermined time, that is, 4 seconds, When the time has elapsed, the time is up, and a second timer interrupt is generated via the interface IF 110 (Y in step 550). When the second timer interrupt occurs, a normal signal is set in the light emission control circuit 102, and a light signal indicating normal is transmitted from the light emitting diode LED10 (step 552). When the optical signal indicating normality is received, the controller 20 releases the accumulation operation for issuing a fire alarm, that is, the time counting for one minute.

Next, the operation of the controller 20 will be described. If a fire abnormal condition occurs and the fire signal transmitted from the sensor unit 10 (step 524) is first received by the controller 20 (Y in step 702), it is determined whether or not the storage mode is set. In this embodiment, the case where the operation is performed in the accumulation mode is described, and this determination is the accumulation mode (Y in step 704). Therefore, next, the storage area R for the counter is used.
The count value k in the AM 22 is incremented by one (step 705), and the count value k has not yet reached the predetermined count value K (step 705).
(N of step 707), and since the first program timer 204 has not been started yet (N of step 707),
Of the program timer 204 is started (step 708),
Indicator L ₂₂ indicating that the storage is turned on (step 710), a second program timer 205 is stopped, which will be described later (step 712), and returns to step 604 while waiting for the next light receiving signal, first Of the program timer 204 and the second program timer 205 (step 606)
And 616).

When the next light receiving signal is received (Y in step 604) and it is determined that the signal is a fire signal (Y in step 702), the count value k of the storage area RAM 22 for the counter becomes 1 again.
Is incremented by one (step 705), and since the first program timer 204 is now running (Y in step 707), simply stopping the second program timer 205 (step 712) Then, the process returns to the state of waiting for the next light receiving signal (step 604), during which the first program timer 204 continues counting time.

In the detector section 10, if the abnormal fire condition continues, 3.
The fire signal (step 524) is continuously transmitted every 5 seconds. When the fire signal is received by the controller 20 and the number of times the fire signal is received by the controller 20 reaches a predetermined number K (Y in step 706), the accumulation-indicating light L ₂₂ goes out and fire indicator L
₂₁ is turned on (step 716), the buzzer B is sounded by operating the sounding circuit 207 to notify the occurrence of a fire (step 718), and when the fire is set to be possible (N in step 720). ), A fire signal is output to the transfer circuit 208 by, for example, adding its own address (step 722) to perform transfer to a fire receiver (not shown) or a telephone transmission terminal (not shown). Be informed of a fire.

While the fire abnormal state continues in the sensor unit 10 and the fire signal continues to be transmitted every 3.5 seconds, the fire signal from the sensor unit 10 is transmitted to the controller due to, for example, the presence of smoke in the transmission path. If not received by controller 20,
Then, the first program timer 204 keeps counting the time, and when one minute elapses thereafter, the first program timer 204 outputs a time-up signal to generate the first program timer interrupt. (Y in step 606). Thus, similar to the above, the fire indicator lamp L ₂₁ with storage Showing light L ₂₂ is turned off is turned on (step 608), causes the buzzer B by operating the ringing circuit 207 (step 610), and If it is set to be in a transferable state (N in step 612), a fire signal is output to the transfer circuit 208 by adding, for example, its own address (step 614), and a fire receiver or telephone (not shown) A so-called fire operation of transmitting a notification to a transmission terminal or the like is performed, and a fire is notified.

Also, if you first receive a fire signal (step
702, Y), while the first program timer 204 performs the time counting operation (Y in step 706), and performs the predetermined number of fire signal counting operations in the counter storage area RAM22. In the meantime, when the fire abnormal state disappears in the detector section 10, the fire detector 12 which monitors the fire every 3.5 seconds stops outputting the fire abnormal signal (step 508).
N) Since the setting of the second timer circuit 110 (Step 528) is not performed, the second timer circuit 110
The second timer interrupt is generated by the time-up of 110 (step 550), and a normal signal is transmitted (step 552).

When normal signal sent by the detector unit 10 in such is received by the controller 20 (step 734), storage Showing like L ₂₂ is turned off (step 736), the first
, The second program timer 205 described later is reset (step 738), and the count value k in the counter storage area RAM 22 is reset.
Is cleared (step 739).
The accumulation operation at 0 and the counting operation of the number of fire signal transmissions are completed.

Next, an operation in a case where an optical path is interrupted between the sensor unit 10 and the controller 20, that is, a case where transmission and reception of a signal between the sensor unit 10 and the controller 20 cannot be performed will be described.

On the sensor unit 10 side, a first timer circuit 107 that outputs a first predetermined time elapsed signal (eight minute elapsed signal) by time-up every time a first predetermined time, for example, eight minutes is counted, is provided. Provided. The first timer circuit 107 sets the first timer circuit every eight minutes.
Each time the predetermined time elapsed signal is output, a first timer interrupt is generated (Y in step 538), and a normal signal is set in the light emission control circuit 102. A normal signal is sent (step 540). When the normal signal is transmitted, the first timer circuit 107 is reset (step 520), and starts counting eight minutes from the beginning.

On the controller 20 side, when a certain time longer than 8 minutes (first predetermined time) is counted, for example, 17 minutes which is slightly more than twice in this embodiment, the time is up and a second light path cutoff signal is output. A program timer 205 is provided.
The program timer 205 is reset each time a normal signal from the sensor unit 10 is received by the controller 20.

Accordingly, when the optical path is not interrupted, the second program timer 20 provided on the controller 20 side is provided.
5 is reset by the normal signal (Y in step 734) received at least every 8 minutes (step 73).
8) There is no time-up, and no second program timer interrupt occurs (N in step 616).

If the optical path is interrupted and the normal signal is no longer sent from the sensor unit 10 and the second program timer 205 of the controller 20 times out after elapse of 17 minutes, the second program timer interrupt is generated (Y in step 616), the optical path blocking indicator L ₂₄ is turned on (step 618), ringing circuit 207 operates briefly (step 620), the optical path blocking occurs in this way Let them know. If necessary, an optical path cutoff signal may be transmitted to a receiver or the like (not shown).

The setting time of the second program timer 205 is 8
The value of 17 minutes, which is more than twice the minute, is the sensor part
The controller 20 cannot receive the normal signal due to any accident that cannot be said to be an optical path interruption abnormality such as when a person has just passed between the optical paths when the 10 sends a normal signal. The second object is to prevent a problem that the program timer 205 times out early and generates an erroneous abnormal signal.

In order to check the optical path, the first timer circuit 107
Time-up every 8 minutes
The signal is not limited to the normal signal output from the controller 10, but any signal may be used as long as it can be confirmed that the signal emitted from the sensor unit 10 is reliably received by the controller 20. For this reason, in the present embodiment, each time various light signals described later are emitted by the emission control circuit 102 of the sensor unit 10 (steps 512, 524, 532, 536, 552, 55).
6) and reset the first timer circuit 107 (step 52).
0) In order to send out a normal signal for checking the optical path, 8 minutes are counted from the signal. Thereby, the number of times that the optical signal is transmitted from the sensor unit 10 can be reduced,
If the power supply of the sensor unit 10 is, for example, a built-in battery, it greatly contributes to extending the life of the power supply.

Other operations If an example of other operations is shown, in the case of the transmission format using an optical signal in the present embodiment, for example, a recovery operation for recovering the controller 20 after a fire has occurred and a countermeasure against the fire state has been taken, (Step 766), a sensor test operation for testing the sensor unit at the time of a periodic inspection or the like (Steps 752, 542, 740), and a communication between the sensor unit 10 and the controller 20 when the system is first installed. Test operation for artificially adjusting the light receiving sensitivity of optical signals between
4) Abnormal operation of the sensor when any abnormality occurs in the sensor unit such as dropping of the sensor unit or the like (steps 530 and 72).
4) and a voltage drop abnormal operation (steps 534 and 730) with respect to a drop in power supply voltage when the sensor is operated by a built-in battery, for example. Some of these operations are not required depending on the system contents, and conversely,
Other operations not shown here may be required. Hereinafter, these operations will be described schematically.Recovery operationWhen a recovery signal is received in the controller 20 such as after a countermeasure against a fire abnormal state or an optical path interruption abnormality,
The recovery operation of the controller 20 is performed. Such a recovery signal may be generated by manually operating a recovery switch (not shown) provided on the controller 20 or a portable remote controller (not shown) provided separately. By operating the controller or the like artificially, for example, an optical signal may be generated, which may be received by the controller 20 to perform the recovery operation, or a recovery command signal from a receiver or the like (not shown). May be performed.

Thus restored signal in the controller 20 is generated (Y in step 766), the fire indicator lamp L ₂₁ and the optical path blocking indicator L ₂₄ is turned off (step 768), and a first program timer 204 is cleared Second program
The timer 205 is reset (step 770), and the sounding circuit 20
7 is turned off to stop the alarm sound (step 772), the count value k in the counter storage area RAM 22 is cleared (step 773), and finally the sounding circuit 207 operates for a short time to confirm the recovery operation. Is performed (step 764).
As a result, the state is returned to the normal fire monitoring state.

Incidentally, this recovery operation, since as an operation of turning off is carried out also the indicator lamp L ₂₁ ~L _26, when the sensor abnormality such as a voltage drop abnormality, or shedding of sensor cells to be described below has occurred in each sensor cell replacement indicator L _25, the recovery operation even for the purpose of turning off the display lamp such as a sensor abnormality display lamp L ₂₆ is performed.

・ ・ ・ Detector test operation ・ ・ ・ When the operation test of the sensor unit 10 is performed, for example, after the adjustment of the light receiving sensitivity at the time of installation or periodic inspection, etc., the sensor unit
For 10 a sensor test signal is artificially generated. Such a sensor test signal is generated by, for example, an optical signal from the controller 20 to the sensor unit 10 by artificially operating a sensor test switch (not shown) provided on the controller 20. Alternatively, an optical signal may be generated by manually operating a separately provided portable remote controller or the like (not shown) toward the sensor unit 10, and the signal may be generated. The sensor test may be performed by receiving the signal on the side, or may be performed by a test command from a receiver (not shown).

Assuming that the sensor test switch provided on the controller 20 has been operated, the operation of the sensor test switch generates an inspection signal in the controller 20 (Y in step 752). When the burst light emitting circuit 203 is turned on, a burst signal as a sensor test signal is emitted from the light emitting diode LED21, and the burst signal is received by the photodiode PD10 of the sensor unit 10. With the burst emission circuit 203 is turned on, the test displayed via the indicator lamp control circuit 206 lamp L ₂₃
Is turned on (step 756), and the ringing circuit 207 is operated for a short time (step 758), thereby notifying the operator of the start of the test operation. Then burst light emission circuit 203
Is turned off (step 760).

If there is a light receiving interrupt on the sensor unit 10 side, that is, the photodiode PD10, the light receiving circuit 101, and the interface IF1
01, the received light signal is detected, and it is
If it is determined that the signal is a burst signal as a sensor test signal from the interface IF (Y in step 542), the interface IF1
A test or check signal is set to the test circuit 106 via step 06 (step 544), a check flag is set (step 546), and a test indicator circuit via the interface IF 108 to indicate that a test is in progress. (step of lighting the test indicator lamp L ₁ by setting 108
548). Then, after resetting the above-mentioned first timer circuit 107 (step 520), an interrupt waiting state (step 522)
Return to

When a test or check signal is set in the test circuit 106 (step 544), the test circuit 106 starts operation and automatically tests its own sensor unit 10. That is,
In the case where the fire detector 12 is a scattered light type smoke detector that receives scattered light of smoke and outputs a signal, light equivalent to the scattered light is emitted from a built-in test light emitting element (not shown), and In the case of a thermal sensor, a test operation such as automatic heating by a built-in heater (not shown) is performed. If the fire detector 12 normally detects a fire, a fire signal is output by the operation of the test circuit, which outputs a fire alarm detection circuit 10
The fire is detected in step 4, and a fire interrupt occurs (Y in step 508).

When a fire interrupt is generated, it is determined whether or not the inspection flag is set (step 510). Since the test is currently being performed and the inspection flag is set in step 546, the determination here is “Yes”. ", That is," Y ". Therefore, a check completion signal is set to the light emission control circuit 102 via the interface IF 102 (step 512), whereby a light signal indicating that the check or test has been normally completed is transmitted from the light emitting diode LED 10 to the controller 20. Is done.

If an optical signal indicating that the test was completed successfully, that is, a check complete signal, is sent,
Test indicator circuit 108 via the IF108 is with test indicator L ₁ is cleared is turned off (step 514), check flag is cleared (step 516), and in order to recover the fire detector 12 which is fire operation The restoration circuit 103 is set via the interface IF103 (step 518). Finally, the first timer circuit 107 is reset (step 5).
20), the process returns to the interrupt standby state (step 522), and the test operation of the fire detector 12 by the light receiving interrupt (Y in step 542) ends here.

When the inspection completion signal sent from the sensor unit 10 is received by the controller 20 in step 512 (Y in step 740), a notification circuit 208 for notifying a higher-order receiver, repeater, or the like via a telephone line or the like. transfer paper prohibition instruction is output to (step 742), the fire indicator lamp L ₂₁ and test indicator lamp L ₂₃ is turned on (step 744), and is operatively ringing circuit 207 is briefly sounding short buzzer B (Step 74
6). The operator can know that the test result is good by the series of lighting and sounding operations. afterwards,
Fire indicator lamp L ₂₁ and test indicator lamp L ₂₃ is turned off (step
748), the transfer circuit 208 is returned to the state before the reception of the inspection completion signal, that is, in the case of the present embodiment, the state in which the transfer prohibition command is released (step 750). If the inspection or test is performed by a command from a receiver (not shown),
An inspection completion signal may be sent to a receiver or the like.

… Installation test operation… As in the present embodiment, when signal transmission between the sensor unit 10 and the controller 20 is performed wirelessly by light, when the system is first installed The installation test setting switch SW1 of the sensor unit 10 shown in FIG. ₁ is manually operated to artificially adjust the light receiving sensitivity of the optical signal between the sensor unit 10 and the controller 20. . The switch operation signal is supplied to the interface IF1 by the installation test setting circuit 111.
Microprocessor as an installation test setting signal via 11
It is taken into the MPU1 side (Y in step 554), whereby the installation test signal is set in the light emission control circuit 102 via the interface IF102, and the light emitting diode LED1
A predetermined light output is emitted from 0 (step 556). It is possible to artificially adjust the opposing relationship between the sensor unit 10 and the controller 20 so that this optical output is optimally received by the controller 20, and thus the controller 20 and the sensor unit 10 The light receiving sensitivity is adjusted during this period. When such adjustment is completed, the installation test set switch SW ₁ is opened manually, the was the opening of the switch SW ₁ is detected (step 558 Y), of the emission control circuit 102 (interface IF 102) The installation test signal is cleared (step 560), and after the first timer circuit 107 is reset for the reason described above (step 520), the process returns to the interrupt waiting state (step 522).

・ ・ ・ Detector abnormal operation ・ ・ ・ Any sensor abnormality related to the installation state such as dropout abnormality occurs, and when it is detected by the sensor dropout detection circuit 105, it is sent to the microprocessor MPU1 side via the interface IF105. The dropping interruption signal (step 530) is generated by receiving the dropout abnormality signal.

When a drop interruption occurs (Y in step 530), an abnormal signal is set in the light emission control circuit 102 and the light emitting diode LED
An optical signal indicating an abnormality is transmitted from 10 (step 53).
2). Thereafter, the first timer circuit 107 is reset (step 520), and returns to the interrupt waiting state (step 522).

When the abnormal signal sent from the sensor unit 10 is received by the light receiving circuit 202 of the controller 20 (Y in step 724), the abnormal signal of the sensor is displayed via the interface IF 206 and the indicator light lighting control circuit 206. lamp L ₂₆ is turned on (step 726), and ringing circuit 207 is operated briefly (step 728). The lighting of the sensor abnormality indicator lamp L _26,
The operator or the administrator can know that some abnormality such as dropout has occurred in the sensor unit 10.

In the present embodiment, the fire detector 12 is detachably provided on the detector unit 10. However, if the fire detector for smoke or heat is integrated into the detector unit 10, the detector may fall off. The detection circuit 105 becomes unnecessary.

··· Voltage drop abnormal operation ··· When the sensor unit 10 operates with the built-in battery, the battery voltage monitoring circuit 109 monitors the power supply voltage of the built-in battery. When the monitoring circuit 109 detects a voltage drop of the internal battery, the detection signal is taken into the microprocessor MPU1 via the interface IF109, thereby causing a voltage drop interrupt (step 534). When a voltage drop interrupt occurs (Y in step 534), a voltage drop signal is set in the light emission control circuit 102, and an optical signal indicating a voltage drop is transmitted from the light emitting diode LED10 (step 536).
Thereafter, the first timer circuit 107 is reset (step 520) and returns to the interrupt waiting state (step 522).

When the voltage drop signal transmitted from the detector unit 10 is received by the controller 20 (Y in step 730), sensor battery replacement indicator L ₂₅ is turned on (step 732), ringing circuit 20
7 is operated for a short time (step 728), so that the operator can know that the battery of the sensor unit 10 should be replaced.

[Effects of the Invention] As described above, according to the present invention, when the receiving unit does not receive the information signal from the fire detecting unit for the third predetermined time, it is determined that the transmission is abnormal. At the same time, when a fire occurs, the time is up and the fire occurrence information is output unless a normal signal is received, so even if the transmission line is interrupted during the accumulation operation, that is, if the transmission line is wired, the transmission line For example, even if the transmission line is interrupted due to disconnection due to heat, or in the case of a wireless system, even if the transmission line is interrupted due to, for example, the filling of smoke, the receiving unit side is informed that the fire is surely fire. In this way, since reliable fire monitoring is performed while monitoring transmission path abnormalities, there is an effect that a high-performance fire alarm device without fear of unreporting can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an internal circuit of a sensor unit (fire detecting unit) 10, FIG. 2 is a diagram showing an internal circuit of a controller (receiving unit) 20, and FIGS. 3A and 3B are sensor units. FIGS. 4, 5A and 5B are flowcharts for explaining the operation of the unit 10, and are flowcharts for explaining the operation of the controller 20. In the figure, 10 is a sensor unit (fire detection unit), 16 is a light transmission / reception unit (transmission unit for the detection unit) of the sensor unit, 20 is a controller (reception unit), and 22 is a light transmission / reception unit (for the reception unit) of the controller. Receiving means).

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Kiyotaka Fujii 4-73 Kudanminami, Chiyoda-ku, Tokyo Nomi Disaster Prevention Co., Ltd. (72) Inventor Tatsumi Asano 4-73 Kudanminami, Chiyoda-ku, Tokyo Nomi Disaster Prevention Co., Ltd. (56) References JP-A-61-198398 (JP, A) JP-A-56-116195 (JP, A) JP-A-1-316899 (JP, A) Jpn. JP, U) JP-B-57-45326 (JP, B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) G08B 17/00

Claims (4)

(57) [Claims] 1. A fire detection means for monitoring a fire in a first cycle and outputting a fire detection signal each time a fire condition is detected, and a fire detection means including a case where the fire phenomenon detection means does not detect a fire. A normal signal output unit that outputs a normal signal in a second cycle when the fire detection unit does not detect any abnormality; and the fire event detection unit is activated each time the fire event detection unit outputs the fire detection signal. A first time measuring means for outputting a normal signal after a lapse of a first predetermined time longer than the first cycle of the fire monitoring when the detecting means no longer outputs the fire detection signal; A detection unit transmitting means for transmitting an information signal including a fire detection signal obtained from the fire phenomenon detection means and a normal signal obtained from the first time measuring means and the normal signal output means; A receiving unit for receiving the information signal transmitted from the transmitting unit for the detecting unit of the fire detecting unit; and the receiving unit for the receiving unit is activated when the receiving unit for the receiving unit first receives the fire detection signal. Second timer means for clearing when the normal signal is received, and when the second predetermined time indicating the storage time elapses without being cleared, time-ups and outputs fire occurrence information; Is restarted every time the receiving means receives any of the information signals, and the time is set when none of the information signals is received for a third predetermined time longer than the second cycle. A storage unit having a third timing unit that outputs a transmission abnormal signal by raising the transmission error signal. 2. The receiving section further comprises a counter for counting the number of times the fire detection signal has been received while the second timer is activated, whereby the count value of the counter reaches a predetermined number. 2. The storage-type fire alarm device according to claim 1, wherein, in such a case, the fire occurrence information is output even before the second timing means times out. 3. The output of the transmission abnormality signal from the third timer means when the second timer means or the counter outputs the fire occurrence information. Item 3. The storage type fire alarm device according to Item 1 or 2. 4. The storage type fire alarm device according to claim 1, wherein the information signal transmitted from the fire detection unit to the reception unit is a signal transmitted spatially. .