JP3364349B2 - Storage type fire receiving system and storage type fire detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage type fire reception system and a fire detector for automatically detecting and notifying a fire occurrence in many places such as a building.

[0002]

2. Description of the Related Art Conventionally, in a building or a large-scale factory, a fire detector having a smoke concentration detecting section for optically detecting smoke concentration is arranged at each place where a fire occurrence should be monitored. At the same time, a fire reception system is installed in which each of these fire detectors is connected to a fire receiver that is installed in a control room or the like via a multiplex transmission signal line and centrally manages the fire occurrence. As shown in FIGS. 9 and 10, the fire detector is preset with a predetermined fire level, and the detected smoke concentration level is preset with the fire determination level L.
When the temperature exceeds the fire judgment level L, the accumulation start signal is sent, and when the fire level is lower than the fire judgment level L, the accumulation cancellation signal is added and the address set for each detector is added, and the signal is sent to the fire receiver via the multiplex transmission signal line. . When the fire receiver receives the accumulation start signal, it starts accumulating time, and when the smoke concentration level continuously exceeds the fire judgment level L for the fire judgment time T or more, the accumulation time is the fire judgment accumulation. When the time T is reached, fire discrimination processing such as sounding of a buzzer is performed. On the other hand, when the accumulation cancellation signal is received, non-fire discrimination processing such as turning off the display on the display unit is performed.

[0003]

However, as shown by A in FIG. 9, when the smoke concentration level exceeds the fire determination level L and then falls below the fire determination level once in the initial stage of the actual fire occurrence. However, since the accumulated time is once cleared and then the accumulation of time is started again when the fire determination level L is exceeded, there is a drawback that a fire cannot be detected promptly.

By the way, in a fire detector, a light projecting element and a light receiving element are arranged so as to face a sensing chamber for taking in smoke when a fire occurs, and the smoke entering the sensing chamber scatters the light of the projecting element. As a result, the amount of light received by the light receiving element increases, and the smoke density level to be detected increases accordingly. Therefore, for example, if dust enters the sensing chamber,
As indicated by B, the light is scattered by the dust and the smoke concentration level exceeds the fire determination level L, and the fire determination processing is performed when the continuously accumulated time reaches the fire determination accumulation time T. It is carried out and a false alarm occurs.

Further, as shown in FIG. 10, when smoke generated by a fire diffuses and the smoke concentration level rises and falls near the fire determination level, the smoke concentration level accumulates every time the smoke concentration level falls below the fire determination level. Since the specified time is cleared, it is not possible to quickly detect the occurrence of a real fire, and the fire detector continues to frequently send the accumulation start signal and accumulation cancellation signal alternately to the fire receiver, which causes the fire to occur. Traffic to the multiplex transmission signal line between the detector and the fire receiver increases, the CPU of the fire receiver continues to operate unnecessarily, and it becomes difficult to receive the interrupt signal from other fire detectors.
There is a problem that makes it more difficult to find a fire quickly.

The present invention has been made in view of the above circumstances, and provides a storage-type fire reception system and a fire detector that can quickly detect the occurrence of an actual fire and do not malfunction due to dust or cigarette smoke. The purpose is to do.

[0007]

A storage-type fire reception system according to the present invention, which is proposed to achieve the above object, comprises a fire receiver equipped with a CPU and a fire detection system equipped with the CPU. In a fire reception system configured by connecting a fire alarm device through a multiplex transmission signal line, the fire receiver is provided with an accumulation processing unit, and the accumulation processing unit is provided from the fire detector to the multiplex transmission signal. Receive through the wire,
When the accumulation start signal is received, the accumulation of time starts from that point, when the accumulation stop signal is received, the accumulation is stopped, and when the non-fire judgment time has elapsed, the accumulation circuit clears the accumulation and this accumulation circuit starts accumulation. When the accumulated time reaches a predetermined value within the non-fire determination time,
The fire determination circuit is commanded, and on the other hand, when the non-fire determination time elapses before the integrated time reaches a predetermined value, a fire determination circuit that commands the non-fire determination processing is provided.

Such a storage-type fire reception system can be embodied in various modifications. That is, in the fire detector, a smoke density sensing unit that outputs a signal at a level corresponding to the detected smoke density and a fire judgment level and a non-fire judgment level as thresholds are set in advance. A level determination unit that outputs a storage start signal when the signal level output by the unit exceeds the fire determination level, a storage stop signal when the level falls below the fire determination level, and an accumulation release signal when the level falls below the non-fire determination level. For the storage circuit of the storage processing unit in the fire receiver, a monitoring control signal is added to the address of the sensor to which the accumulation start signal, accumulation stop signal or accumulation cancellation signal from the level determination unit is added. The fire prevention receiver has a communication control unit for sending out via the multiplex transmission signal line, and the storage circuit of the storage processing unit in the fire receiver has passed the non-fire determination time. In addition to the above, the accumulation is cleared even when the accumulation cancellation signal is received, and the fire judgment circuit of the accumulation processing unit described above is also used when the accumulation circuit clears the accumulation except when the non-fire judgment time has elapsed. The non-fire discrimination process may be instructed (claim 4).

Here, the supervisory control signal sent from the fire detector is returned in the case of a normal polling from the fire receiver and in the case of being transmitted from the fire detector to the fire receiver by interrupt processing. It is received by the fire receiver by both parties. Further, the storage-type fire reception system of the present invention proposed in claim 2 includes a fire receiver equipped with a CPU, a repeater connected to the fire receiver via a multiplex transmission line, and a repeater connected to the fire receiver. In a fire reception system connected via a multiplex transmission signal line for a monitoring line and configured to include a fire detector equipped with a CPU, the relay device is provided with a storage processing unit. The section receives from the fire detector through the multiplex transmission signal line for the monitoring line, starts the accumulation of time from the point when the accumulation start signal is received, and stops the accumulation when the accumulation stop signal is received, A storage circuit that clears the storage when the non-fire determination time has elapsed, and the time accumulated by the storage circuit is accumulated from the time when this storage circuit starts storage,
When the accumulated time reaches a predetermined value within the non-fire judgment time, a fire processing command signal is sent, while when the non-fire judgment time elapses before the accumulated time reaches the predetermined value, a non-fire processing command signal is sent. , And a fire determination circuit for sending to each of the fire receivers.

Such a storage fire reception system can be embodied in various modifications. That is, in the fire detector, a smoke density sensing unit that outputs a signal at a level corresponding to the detected smoke density and a fire judgment level and a non-fire judgment level as thresholds are set in advance. A level determination unit that outputs a storage start signal when the signal level output by the unit exceeds the fire determination level, a storage stop signal when the level falls below the fire determination level, and an accumulation release signal when the level falls below the non-fire determination level. For the storage circuit of the storage processing unit in the fire receiver, a monitoring control signal is added to the address of the sensor to which the accumulation start signal, accumulation stop signal or accumulation cancellation signal from the level determination unit is added. The fire prevention receiver has a communication control unit for sending out via the multiplex transmission signal line, and the storage circuit of the storage processing unit in the fire receiver has passed the non-fire determination time. In addition to the above, the accumulation is cleared even when the accumulation cancellation signal is received, and the fire judgment circuit of the accumulation processing unit described above is also used when the accumulation circuit clears the accumulation except when the non-fire judgment time has elapsed. It can be configured to instruct the non-fire discrimination processing.

Further, the storage type fire detector of the present invention proposed in claim 3 is connected to a fire receiver or a repeater through a multiplex transmission signal line for a monitoring line, and these fire receivers are connected. Alternatively, a smoke concentration sensing device configured to send a monitoring control signal to which a detector address is added to a repeater, which outputs a signal at a level according to the detected smoke concentration Section and the fire judgment level and the non-fire judgment level are set as thresholds in advance, and when the signal level output by the smoke concentration sensing unit exceeds the fire judgment level, the accumulation start signal is output and the fire judgment level is set. A level discriminator that outputs a storage stop signal when it falls below the level and a storage release signal when it falls below the non-fire level, and a level starter that receives a storage start signal from this level discriminator. Start the accumulation time from the time,
When the accumulation stop signal is received, the accumulation is stopped, and when the accumulation cancellation signal is received, the accumulation is cleared and the accumulation time is accumulated by the accumulation circuit from the time when the accumulation circuit starts accumulation. When the accumulated time reaches a predetermined value within the non-fire judgment time, the fire processing command signal is sent, while when the accumulation circuit receives the accumulation cancellation signal, or before the accumulated time reaches the predetermined value, the non-fire judgment is made. For the fire determination circuit that outputs a non-fire processing command signal when the time has passed, and for the fire receiver or repeater, either the fire processing command signal or the non-fire processing command signal at the sensor address It has a configuration including a communication control unit that sends a supervisory control signal to which is added via a multiplex transmission signal line.

[0012]

According to the storage-type fire reception system of the present invention described in claim 1, multiple transmission is performed between the fire receiver and each fire detector by designating an address assigned to each detector. That is, the fire detector sends a supervisory control signal in which an accumulation start signal or an accumulation stop signal is added to the address of the detector to the multiplex transmission signal line. In the fire receiver, after the accumulation circuit of the accumulation processing unit starts accumulation of time when it receives the accumulation start signal from the fire detector, Each time the stop signal is received, the time accumulation is temporarily stopped, and each time the accumulation start signal is received, the time accumulation is restarted. Fire receiver CPU
When receiving the accumulation start signal, displays the address of the sensor that has started accumulating time on the display unit and prints the fire information.

The fire determination circuit of the accumulation processing unit sequentially accumulates each time accumulated in the accumulation circuit, and the accumulated time is a predetermined value before the non-fire determination time elapses, that is, the fire determination accumulation time. When reaches, the fire discrimination process is performed at that time. This fire discrimination process is performed for each fire detector based on the address. On the other hand, if the non-fire judgment time elapses before the accumulated time reaches the fire judgment accumulation time,
At that time, non-fire discrimination processing is performed. In other words, the display on the display is turned off and non-fire printing is performed.

Therefore, until the non-fire determination time elapses after the accumulation of time is started, the non-fire determination processing as in the conventional system is not performed when the smoke concentration level falls below the fire determination level. Even if the smoke concentration level rises and falls in the vicinity of the fire determination level, there is no inconvenience, and the CPU of the fire receiver is not operated unnecessarily. Moreover, when the smoke concentration level falls below the fire determination level, the accumulated time is accumulated without clearing it, so that a real fire can be found quickly. Also, since the accumulated time is sequentially added and the fire judgment processing is performed when the accumulated time reaches the fire judgment accumulation time, it is possible to set the fire judgment accumulation time to a time that is sufficiently longer than in the case of the conventional system. Even if dust enters the detection chamber of the fire detector, the dust sinks to the bottom of the detection chamber by the time the fire determination accumulation time elapses, so false alarms due to dust or cigarette smoke can be reliably prevented.

According to the storage-type fire reception system of the present invention described in claim 2, in the large-scale fire reception system, the accumulation processing is performed in the relay device interposed between the fire receiver and each fire detector. It is equipped with a unit, and the presence or absence of a fire is discriminated by a repeater, and the fire receiver performs interrupt processing only when the repeater detects the occurrence of a fire.
In this way, because distributed processing is used to determine whether a fire has occurred in the repeater, traffic to the multiplex transmission signal line between the repeater and the fire receiver is reduced, and the presence or absence of a fire in the system is reduced. It is possible to speed up the determination of.

According to the storage type fire detector of claim 3,
Whether or not a fire has occurred is determined by the storage processing unit provided in itself, and a fire processing command signal or a non-fire processing command signal is sent to the fire receiver or repeater. Therefore, the fire detector does not operate when the accumulated accumulation time reaches the fire judgment accumulation time, or when the smoke concentration level falls below the non-fire judgment level or when the accumulated accumulation time does not reach the fire judgment accumulation time. Since the interrupt signal is not sent to the fire receiver or repeater except when the fire judgment time has elapsed, traffic in the storage fire reception system configured using this storage fire detector is significantly reduced, and The speed of determination can be further promoted.

According to the storage type fire reception system of claims 4 and 5, when the fire detector is provided with a fire determination level and a non-fire determination level, and the smoke concentration falls below the non-fire determination level. , Send the accumulation cancellation signal. When the fire receiver or repeater receives the accumulation cancellation signal, the accumulation time accumulated up to that point is cleared. Generally, the smoke density level erroneously detected by dust or the like significantly decreases in a short time, so that the accumulation time due to this can be cleared and the non-fire discrimination processing can be performed accurately and quickly.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the basic configuration of the storage fire reception system proposed in claim 1. The fire receiver 1 installed in a building control room or the like derives a multiplex transmission signal line 40, and the multiplex transmission signal line 40 is installed in each of the floors where fire detection is to be monitored. Machine 2 is connected by setting an address for each.

The fire receiver 1 has a CPU 11 for controlling the overall signal processing of the fire receiver 1, a communication control unit 12 for controlling transmission / reception with respect to the multiplex transmission signal line 40, and a smoke density at a fire determination level. A communication information display unit 13 that displays the address of the fire detector 2 that has started to accumulate time due to exceeding, a communication information printing unit 14 that prints the communication information displayed on this display unit 13, and a fire. A storage processing unit 15 that determines whether or not a fire has occurred is provided for each sensor 2.

The storage processing section 15 is composed of a storage circuit 15a and a fire determination circuit 15b. The storage circuit 15a has a built-in timer unit, and a monitoring control signal from each fire detector 2 to which an accumulation start signal or accumulation stop signal is added to the address of the detector is transmitted from the multiplex transmission signal line 40 to the communication control unit 12 and the CPU 11. When receiving the accumulation start signal, the accumulation of time is started from that point, and when the accumulation stop signal is received, the accumulation operation is stopped. Fire judgment circuit 1
5b sequentially integrates the respective times accumulated by the accumulation circuit 15 from the time when the accumulation circuit 15a starts accumulation, and when the accumulated time reaches a predetermined value within a non-fire determination time described later, a fire occurs. A discrimination processing signal is output to the CPU 11, which causes the CPU 11 to perform fire discrimination processing. On the other hand, when the non-fire determination time elapses before the integrated time reaches the predetermined value, the fire determination circuit 15b clears the accumulated time accumulated up to that time, and the CP
A non-fire discrimination processing command signal is output to U11, whereby the CPU 11 performs non-fire discrimination processing.

Each of the fire detectors 2 detects the smoke density by detecting the density of smoke with the CPU 22 that controls the overall signal processing of the fire detector 2, the communication control section 21 that controls transmission and reception with respect to the multiplex transmission signal line 40. The smoke concentration detecting unit 23 outputs a signal of a level corresponding to the concentration. The CPU 22 has a built-in level discriminator 22a.
Is a preset fire determination level and smoke concentration sensing unit 23.
Smoke density sensor 2 compares the signal level input from
An accumulation start signal is generated when the signal level of 3 exceeds the fire determination level, and an accumulation stop signal is generated when the signal level falls below the fire level. When the accumulation start signal or the accumulation stop signal is generated, the CPU 22 adds an address to these signals to generate a monitor control signal, and sends it to the multiplex transmission signal line 40 via the communication control unit 21.

The fire receiver 1 polls each fire detector 2, and a monitoring control signal is sent from each fire detector 2 in response to the polling.
Alternatively, a monitoring control signal may be transmitted by interrupt processing. FIG. 2 is a flow chart showing signal processing of the storage fire reception system of FIG. C in fire detector 2
When the level determination unit 22a of the PU 22 determines that the signal level input from the smoke concentration detection unit 23 exceeds the fire determination level L, the fire detector 2 sends an accumulation start signal and receives the accumulation start signal. In the fire receiver 1, the storage circuit 15a receives a command from the CPU 11 and starts time storage (steps S1 and S2). Next, the level determination unit 22a of the fire detector 2 monitors that the signal level input from the smoke concentration detection unit 23 falls below the fire determination level L, and when it determines that the signal level has fallen below the fire determination level L, a fire is detected. An accumulation stop signal is sent from the detector 2, and in the fire receiver 1 receiving this accumulation stop signal, the accumulation circuit 15a is
Upon receiving a command from PU11, the time accumulation operation is started,
The fire determination circuit 15b integrates the time accumulated by the accumulation circuit 15a. On the other hand, the CPU 11 starts the time counting operation from the time when the storage circuit 15a starts the storage, and determines whether or not the measured time Ta exceeds the preset non-fire determination time TC and exceeds the preset non-fire determination time TC. If not, in the fire receiver 1, the CPU 11 continues the accumulation operation of the time accumulated by the accumulation circuit 15a until the CPU 11 determines that the time Ta during counting exceeds the non-fire judgment time TC. (Steps S3 to S6). Further, the fire determination circuit 15b constantly determines whether or not the integrated value Tb of the storage time input from the storage circuit 15a exceeds the preset fire determination time TB, and it is determined that it does not exceed here. If the CPU 11 determines that the time Ta measured by the CPU 11 does not exceed the non-fire determination time TC, the same processing as described above is continued (steps S7 to S8).

Then, in the fire receiver 1, the CPU 1
When 1 determines that the time Ta during counting exceeds the non-fire determination time TC, the fire determination circuit 15b clears the accumulated time, and executes a non-fire determination process such as turning off the display of the display unit 13. (Steps S8 to S10). On the other hand, when the fire determination circuit 15b determines that the cumulative value Tb of the accumulated times exceeds the fire determination time TB, the CPU 11
Fire discrimination processing command signal is output to
The PU 11 executes fire determination processing such as displaying the address of the fire detector 2 installed at the location where the fire has occurred on the communication information display unit 13 (steps S8 and S1).
1).

3 and 3 are explanatory views showing the results when the signal processing described in FIG. 2 is performed in the system of FIG. In the storage fire reception system described above, as shown in FIG. 3A, which shows the same changes as in FIG. 9A,
In a case where the smoke concentration level exceeds the fire determination level L and then falls below the fire determination level at the initial stage of the actual fire, the fire determination circuit 15b starts to accumulate the storage time from the storage circuit 15a. Non-fire judgment time T
The accumulated time is not cleared even if the smoke concentration level falls below the fire judgment level L until c has elapsed, and the time when the accumulation circuit 15a starts accumulation from the time when the smoke concentration level exceeds the fire judgment level L again is accumulated. I will do it. Therefore, it is shown that the occurrence of fire can be detected reliably and quickly.

Further, as shown in B of FIG. 3 which shows the same change as in B of FIG. 9, if dust or the like enters the sensing chamber and the smoke concentration level continuously exceeds the fire determination level L, a false alarm is issued. Nothing. That is, in this system, the intermittent storage time in the storage circuit 15a is sequentially integrated in the fire determination circuit 15b, and the fire determination process is performed when the integrated time Tb reaches the fire determination storage time TB. It becomes possible to set the accumulation time TB to a time that is sufficiently longer than that in the conventional system, and even if dust enters the sensing chamber of the smoke concentration sensing unit 23 of the fire detector 2, this dust has a fire determination accumulation time TB. If it sinks to the bottom of the sensing chamber by the time it passes, false alarms due to dust and cigarette smoke can be reliably prevented.

Further, as shown in FIG. 4 showing the same change as in FIG. 10, when the smoke generated by the fire is diffused and the smoke concentration level rises and falls near the fire judgment level, the storage circuit 15a Until the non-fire determination time Tc elapses after the accumulation time is started, the non-fire determination process is not performed even if the smoke concentration level is lower than the fire determination level L, so it is not inconvenient. The CPU 11 of the fire receiver 1 will not be used unnecessarily. Moreover, in the WTL determination circuit 15b, when the smoke concentration level falls below the fire determination level L, the time accumulated up to that point is sequentially added up without being cleared, so that it is possible to detect an actual fire reliably and quickly. ing.

FIG. 5 is a flowchart showing the signal processing of the storage-type fire reception system proposed in claim 4. Although the configuration is the same as that of FIG. 1, the level discriminator 22a of the fire detector 2 has the same structure. , The fire determination level LH and the non-fire determination level LL are set as thresholds, and the level determination unit 22a starts accumulation when the signal level output by the smoke concentration detection unit 23 exceeds the fire determination level LH. When the signal falls below the fire judgment level LH, an accumulation stop signal is output, and when the signal falls below the non-fire judgment level LL, an accumulation cancellation signal is output. CPU of fire receiver 1 that received this accumulation release signal
Numeral 11 immediately executes the non-fire discrimination process and clears the integrated value of the accumulation time of the fire discrimination circuit 15b.

FIG. 6 is an explanatory diagram showing the result when the signal processing described in FIG. 5 is performed. The change on the left side of the figure shows the case where the smoke concentration level rises due to dust etc.The smoke concentration level erroneously detected due to such dust etc. generally decreases significantly in a short time as shown in the figure. Falls below the non-fire judgment level LL. At this point, the cumulative time in the fire determination circuit 15b is cleared, and the CPU
The non-fire discrimination processing is executed by 11. Therefore,
False alarms due to dust and the like can be reliably prevented, and an actual fire can be accurately and quickly generated.

FIG. 7 is a block diagram showing the basic structure of the storage type fire reception system proposed in claim 1. This storage-type fire reception system includes a storage processing unit 32 in a repeater 3 that is interposed between a fire receiver 1 and each fire detector 2 through another multiplex transmission signal line 41 in a large-scale fire reception system. The relay device 3 is provided to determine whether or not a fire has occurred. Accumulation processing unit 32
Has a configuration similar to that included in the fire receiver 1 shown in FIG. 1, and includes a fire determination circuit 32a and a storage circuit 32b.
It is composed of and. The repeater 3 performs an interrupt process on the fire receiver through the multiplex transmission signal lines 41 and 40 from the communication control unit 31 only when a fire is detected. In this way, since the distributed processing in which the presence or absence of a fire is discriminated by the repeater 3 is adopted, the repeater 3
The traffic to the multiplex transmission signal line 40 between the fire receiver 1 and the fire receiver 1 is significantly reduced, and it is possible to further speed up the determination of whether or not a fire has occurred in the system. Also in this storage-type fire reception system, as the fire detector 2, a single fire determination level L as shown in FIG. 2 is set, and two types of determination levels LH and LL are set as shown in FIG. Both of the above can be applied, and the same effect as described above can be obtained.

FIG. 8 is a block diagram showing the basic structure of the storage-type fire reception sensor 5 proposed in claim 3. The storage type fire detector 5 is provided with a storage processing unit 24 itself, and the storage processing unit 32 is the same as that provided in the fire receiver 1 and the repeater 3 shown in FIGS. 1 and 7. In this configuration, the storage circuit 24a and the fire determination circuit 24b are included. In the accumulation processing unit 32, the presence or absence of a fire is determined in the same manner as described above, and the CPU 22 uses the solid line to indicate the fire determination processing command signal or the non-fire determination processing command signal based on the signal from the fire determination circuit 24b. The signal is sent to the repeater 3 as shown, or to the fire receiver 1 as shown by the chain double-dashed line.

Therefore, from the fire detector 5, when the time when the accumulation time is integrated by the fire determination unit 24b reaches the fire determination accumulation time TB and the fire determination processing command signal is sent, or the smoke concentration level is non-fire. Other than when the non-fire determination time Tc elapses before the fire determination accumulation time TB reaches the fire determination accumulation time TB, or when the non-fire determination processing command signal is transmitted, the fire receiver 1 or no interrupt signal is sent to the repeater 3.
Therefore, in the storage-type fire reception system configured by using the storage-type fire detector 5, traffic is significantly reduced, and the speed of fire determination can be further promoted.

[0032]

According to the accumulation type fire reception system of claim 1, when the accumulation of time is started when the smoke concentration level exceeds the fire judgment level, from this time until the non-fire judgment time elapses. Does not perform non-fire discrimination processing when the smoke density level falls below the fire discrimination level, so, for example,
Even if the smoke concentration level rises and falls in the vicinity of the fire determination level, there is no inconvenience, and the CPU of the fire receiver is not operated unnecessarily. Moreover, when the smoke concentration level falls below the fire judgment level, the accumulation of time by the accumulation circuit is simply stopped, and the accumulated time is accumulated without clearing the accumulated time. Fire detection processing is performed when the value reaches a predetermined value for determining that the Since it is possible to set, even if dust enters the detection chamber of the fire detector, this dust will sink to the bottom of the detection chamber by the time the fire judgment accumulation time elapses,
False alarms due to dust and cigarette smoke can be reliably prevented.

According to the storage-type fire reception system of claim 2, in the large-scale fire reception system, the relay device interposed between the fire receiver and each of the fire detectors is provided with the storage processing unit, Since the presence or absence of a fire is discriminated by the repeater, the fire receiver is interrupted only when the repeater detects the occurrence of a fire. In this way, because distributed processing is used to determine whether or not a fire has occurred, the traffic on the multiplex transmission signal line between the repeater and the fire receiver is significantly reduced, and a fire in the system is generated. It is possible to further speed up the determination of the presence / absence and increase the accuracy.

According to the storage type fire detector of claim 3, the storage processing unit for determining whether or not a fire has occurred is provided in itself.
The fire discrimination processing command signal or the non-fire discrimination processing command signal is sent to the fire receiver or the repeater. As a result, the fire detector will not operate when the accumulated accumulation time reaches the fire judgment accumulation time, or when the smoke concentration level falls below the non-fire judgment level or before the accumulated accumulation time reaches the fire judgment accumulation time. Since the interrupt signal is not sent to the fire receiver or repeater except when the fire judgment time has elapsed,
The traffic in the storage-type fire reception system configured using this storage-type fire detector is significantly reduced, and the speed of fire determination can be further promoted.

In the storage-type fire reception system according to claims 4 and 5, the fire detector is provided with a fire determination level and a non-fire determination level, and the accumulation is released when the smoke concentration falls below the non-fire determination level. When the signal is sent to the fire receiver or the repeater, and the fire receiver or the repeater receives the accumulation canceling signal, the accumulation time accumulated up to that point is cleared. Generally, the smoke concentration level that is erroneously detected due to dust, etc. often drops significantly in a short time, so the accumulation time due to this can be cleared by the accumulation cancellation signal, and non-fire discrimination processing can be performed accurately and quickly. You can Therefore, it is possible to further speed up the discovery of the actual fire and improve the accuracy thereof.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a storage-type fire reception system (claim 1) according to an embodiment of the present invention.

FIG. 2 is a flowchart showing signal processing of the above system.

FIG. 3 is a timing chart showing a result of the signal processing of the above.

4 is a timing chart showing another result of the signal processing according to FIG.

5 is a flowchart showing another signal processing (claim 4) of the system of FIG.

FIG. 6 is a timing chart showing the result of the signal processing of the above.

FIG. 7 is a block diagram showing a basic configuration of a storage fire reception system (claim 2) according to another embodiment of the present invention.

FIG. 8 is a block diagram showing a basic configuration of a storage type fire detector (claim 3) according to still another embodiment of the present invention.

FIG. 9 is a timing chart showing a result of signal processing in the conventional system.

FIG. 10 is a timing chart showing another result of signal processing in the conventional system.

[Explanation of symbols]

1 fire receiver 2 fire detector 3 repeaters 5 Storage type fire detector 11 Fire receiver CPU 15 Fire receiver storage unit 15a Fire receiver storage circuit 15b Fire judgment circuit of fire receiver 22 CPU of fire detector 22a Level determination unit 23 Smoke density sensor 24 Accumulation processing part of accumulation type fire detector 24a Storage circuit of storage-type fire detector 24b Fire determination circuit for storage type fire detector 32 Repeater storage processing unit 32a Repeater storage circuit 24b Repeater fire determination circuit

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) G08B 17/00 G08B 23/00-31/00

Claims (5)

(57) [Claims] 1. A fire reception system comprising a fire receiver having a CPU and a fire detector having the CPU connected via multiplex transmission signal lines, wherein the fire receiver has a storage processing unit. This accumulation processing unit receives from the fire detector through the multiplex transmission signal line, starts accumulation of time from the time when it receives the accumulation start signal, and accumulates it when it receives the accumulation stop signal. A storage circuit that clears the storage when the non-fire determination time has elapsed after it has stopped, and the time accumulated by the above-mentioned storage circuit from the time when the storage circuit started to accumulate, and the accumulated time When the predetermined value is reached within the judgment time, the fire discrimination process is instructed. On the other hand, when the non-fire judgment time elapses before the accumulated time reaches the predetermined value, the non-fire discrimination process is instructed. Fire-reception system with a built-in fire determination circuit. 2. A fire receiver equipped with a CPU, a repeater connected to the fire receiver via a multiplex transmission line, and a repeater connected to the repeater via a multiplex transmission signal line for a monitoring line, In a fire receiving system configured to include a fire detector equipped with a CPU, the relay processing unit is provided with a storage processing unit, and the storage processing unit is provided from the fire detection unit to the monitoring line. A storage circuit that receives the signal through the transmission signal line, starts accumulation of time from that point when it receives the accumulation start signal, stops the accumulation when it receives the accumulation stop signal, and clears the accumulation when the non-fire determination time elapses. When the accumulation circuit starts accumulation, the respective times accumulated by the accumulation circuit are sequentially accumulated, and when the accumulated time reaches a predetermined value within the non-fire judgment time, the fire processing command signal is However, when the non-fire determination time elapses before the accumulated time reaches the specified value, a fire determination circuit that sends a non-fire processing command signal to the fire receiver respectively system. 3. A fire control or a repeater is connected via a multiplex transmission signal line for a monitoring line, and a supervisory control in which a sensor address is added to the fire receiver or the repeater. It is a storage type fire detector configured to send out a signal, and a smoke concentration sensing unit that outputs a signal at a level according to the detected smoke concentration, and a fire determination level and a non-fire determination level as thresholds in advance. If the signal level output by the smoke concentration detection unit exceeds the fire judgment level, the accumulation start signal is output.If the signal level is below the fire judgment level, the accumulation stop signal is output. A level discriminator that outputs a release signal, and when the accumulation start signal is received from this level discriminator, time accumulation starts from that point, and when the accumulation stop signal is received, the accumulation The storage circuit that stops and clears the storage when it receives the storage release signal, and the time accumulated by the above storage circuit from the time when this storage circuit starts to accumulate, and the accumulated time is within the non-fire judgment time. When the non-fire judgment time elapses before the accumulated circuit reaches the predetermined value, the fire processing command signal is sent when the predetermined value is reached in the For the fire judgment circuit that outputs a processing command signal, and for the fire receiver or repeater, multiplex the supervisory control signal with the above fire processing command signal or non-fire processing command signal added to the sensor address. A storage-type fire detector having a configuration including a communication control unit that transmits the signal via a transmission signal line. 4. The fire detector according to claim 1, wherein a smoke concentration sensing unit that outputs a signal of a level corresponding to the detected smoke concentration, and a fire determination level and a non-fire determination level are set as thresholds in advance. If the signal level output by the smoke density sensing unit exceeds the fire judgment level, the accumulation start signal is output, if it falls below the fire judgment level, the accumulation stop signal is output, and if it falls below the non-fire judgment level, the accumulation release signal is released. For the level discriminating unit that outputs a signal and the accumulating circuit of the accumulating processing unit in the fire receiver, any of the accumulating start signal, accumulating stop signal, or accumulating canceling signal from the level discriminating unit is stored in the sensor address And a communication control unit for sending a supervisory control signal to which is added via the multiplex transmission signal line, and the storage circuit of the storage processing unit in the fire receiver is In addition to when the non-fire judgment time has elapsed, the accumulation is cleared when the accumulation cancellation signal is received. Accumulation type fire reception system configured to instruct non-fire discrimination processing even when accumulation is cleared. 5. The fire detector according to claim 2, wherein the smoke detector outputs a signal of a level corresponding to the detected smoke concentration, and a fire determination level and a non-fire determination level are set as thresholds in advance. If the signal level output by the smoke density detection unit exceeds the fire judgment level, the accumulation start signal is output, if it falls below the fire judgment level, the accumulation stop signal is output, and if it falls below the non-fire judgment level, accumulation is released. For the level discriminating unit that outputs a signal and the storage circuit of the storage processing unit in the repeater,
And a communication control section for sending out a monitor control signal to the address of the detector, to which the accumulation start signal, accumulation stop signal or accumulation cancellation signal from the level judgment section is added, through the multiplex transmission signal line. Therefore, the storage circuit of the storage processing unit in the repeater clears the storage not only when the non-fire determination time has elapsed, but also when the storage release signal is received. A storage-type fire reception system configured to output a non-fire discrimination processing command signal when the storage circuit clears the storage other than when the determination time has elapsed.