JP2003248887A - Polling type fire detection method, continuity confirmation method, and multiplex transmission type fire receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make the switching operation frequency of a switching relay not exceed a switching operation guarantee frequency for the life of the article irrelevantly to the number of installed repeaters. <P>SOLUTION: A step S8 wherein it is decided by comparison whether the elapsed time after the start of polling exceeds a specified time each time repeaters 2 in a system complete fire detection polling operation by one round is added; when the specified time is exceeded, continuity confirmation polling operation is carried out, but when not, the fire detection polling operation is repeated. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention derives a monitoring line to which a repeater to which a unique communication address is assigned is connected to transmit and receive a multiplex transmission signal between the multiplex transmission fire receiver and the relay. Then, in the fire alarm system that detects the fire detector line connected to each repeater and the disconnection of the fire detector line, the fire monitoring signal from the multiplex transmission fire receiver to each repeater. Is sent cyclically and the return signal returned from the repeater is received by the multiplex transmission fire receiver to determine whether or not a fire has occurred, and the continuity confirmation signal is cyclically sent to each repeater. The present invention relates to a polling-type fire detection method and a continuity confirmation method, and a multiplex transmission-type fire receiver, which are also transmitted to a relay and determine a reply signal returned from a repeater to determine a conduction abnormality in a fire alarm system.

[0002]

2. Description of the Related Art Recently, fire alarm systems have been widely introduced in large-scale buildings such as multi-family houses and buildings.
An example of such a fire alarm system is a system shown in FIG.

[0003] In this fire alarm system, a multiplex transmission type fire receiver 100 installed in a centralized monitoring room, a manager's room or the like leads a monitoring line L composed of multiple signal lines to the monitoring line L. Repeater 2 with fire detector 300 connected
It is configured by connecting 00 ...

The multiplex transmission fire receiver 100 cyclically sends out a fire monitoring signal to which a communication address assigned to the relay 200 is added via the monitoring line L, and the relay 20
All the repeaters 2 determine the presence or absence of a fire (hereinafter referred to as "fire detection polling operation") by receiving the reply signal returned from 0 by the multiplex transmission fire receiver 100.
The fire monitoring and confirmation of the communication state of the monitoring line L are performed by performing the operation every 5 ... within 5 seconds.

The repeater 200 is provided with a fire detection circuit 202 for performing the above-mentioned fire monitoring and a continuity confirmation circuit 203 for monitoring a disconnection or a short circuit with the fire detector 300. Both of these circuits 202 are provided. , 203 and the monitoring line L are connected via a switching relay 201.

FIG. 5 is a flow chart showing the conventional polling operation.
All the repeaters (# 1) 200 ...
After the fire detection polling operation is completed, the switching relay 201 of one repeater (# 1) 200 is immediately switched to the continuity confirmation circuit 203 side, and the repeater (# 1) is connected via the monitoring line L. The continuity confirmation signal with the assigned communication address is sent to 200, and the reply signal returned from the repeater 200 (# 1) is discriminated to determine the continuity abnormality in the system (hereinafter referred to as "conduction confirmation polling"). Operation)) and then switch to the fire detection polling operation again, and then repeat these operations for all the repeaters 200 in the same manner, thereby confirming the fire detection continuity by the polling method. ing.

[0007]

By the way, the fire detection polling is subject to a limit of 5 seconds before a fire is detected, but the continuity confirmation polling is an auxiliary function, so to speak. There is no time constraint.

However, in the conventional polling type fire detection method and continuity confirmation method, since the continuity confirmation polling operation is performed immediately after the fire detection polling operation, for example, when the number of repeaters 200 installed is small, the switching relay 201 is Since the switching operation is frequently performed to the fire detection circuit 202 or the continuity confirmation circuit 203 side, there is a problem that the life of the switching relay 201 is shortened.

For example, the maximum number of addresses of the repeater 200 is 255, the period for completing all the fire detection polling of these repeaters is 4 seconds, the life of the switching relay 201 is 10 years, and the guaranteed number of switching operations thereof. In the conventional fire system with 1 million times, the continuity confirmation polling cycle is 1020 seconds (4 seconds × 255 addresses), that is, the switching relay is switched once every 1020 seconds. Therefore, the number of switching operations is 310,000 even in the 10th year, which is the life of the product, which is not a problem. However, in the above example, the number of repeaters 200 installed is small and the maximum number of addresses is only 51, for example. If not, the continuity confirmation polling cycle is
204 seconds (4 seconds x 51 addresses), that is, 2
The switching relay 21 is switched once every 04 seconds. Therefore, the number of switching operations in the 10th year, which is the life of the product, is 15
This is 50,000 times, which exceeds the product life of the switching relay 201, which is a problem.

The present invention has been made in view of the above circumstances, and regardless of the number of repeaters installed, the number of switching operations of the switching relay does not exceed the guaranteed number of switching operations for the life of the product. It is an object of the present invention to provide a detection method, a continuity confirmation method, and a multiplex transmission fire receiver.

[0011]

In order to achieve the above object, in the polling type fire detection method and the continuity confirmation method according to claim 1 of the present invention, every repeater repeats every fire detection polling operation. In the basic operation of interrupting the continuity confirmation polling operation, the timer is started at the start of the fire detection polling operation, and after one cycle of the fire detection polling operation is completed, the elapsed time is compared with the predetermined time of one repeater. A step to determine is added.

Then, as a result of the comparison and determination, if the elapsed time exceeds the predetermined time, the continuity confirmation polling operation is started and executed, but if the elapsed time does not reach the predetermined time, a further fire occurs. After repeating the fire detection polling operation until the elapsed time exceeds the predetermined time, the detection polling operation starts the continuity confirmation polling operation, and when the continuity confirmation polling operation is completed, the elapsed time recounting starts, Thereafter, similarly, the continuity confirmation polling operation is repeatedly performed for each repeater in the same manner.

Therefore, the continuity confirmation polling operation is not started immediately after the completion of the fire detection polling operation until the predetermined time has elapsed, and the number of switching operations of the switching relay is set regardless of the number of repeaters installed. It is possible to ensure that the number of guaranteed switching operations for the product life is not exceeded.

In the polling type fire detection method and the continuity confirmation method according to the second aspect of the present invention, the same effect as that of the first aspect can be obtained by the switching control in the repeater.

In the polling type fire detection method and the continuity confirmation method according to the third aspect of the present invention, when the continuity confirmation polling operation is executed after a predetermined time has elapsed, the fire detection polling operation has already been executed. When the fire detection polling operation is completed, the continuity confirmation polling operation is executed after waiting for one round of the fire detection polling operation, so that the fire monitoring can be reliably performed.

In the multiplex transmission fire receiver according to the fourth aspect of the present invention, multiplex transmission signals are transmitted to and received from a plurality of repeaters to issue an alarm or fire of a fire detector line connected to the repeaters. In the multiplex transmission type fire receiver that is designed to determine the disconnection of the sensor line, when operating the multiplex signal transmission control unit to start the fire detection polling operation for the repeater,
After the delay timer means for managing each repeater is activated and the fire detection polling operation is completed once, the elapsed time measured by the delay timer means for one repeater is set to a preset predetermined time. A signal processing unit for comparison is provided.

As a result of the comparison, when the elapsed time exceeds the predetermined time, the continuity confirmation polling operation is started, while when the elapsed time does not exceed the predetermined time, the fire detection polling operation is continued until the predetermined time is exceeded. After repeating the above, the continuity confirmation polling operation is started, and when the continuity confirmation polling operation is completed, the delay timer means is restarted, and thereafter, the continuity confirmation polling operation is repeated for each repeater in the same manner. I am trying to do it.

Therefore, the continuity confirmation polling is not started immediately after the completion of the fire detection polling until the predetermined time has elapsed, and the number of switching operations of the switching relay is set regardless of the number of relays installed and the life of the product. It is possible to ensure that the number of switching operation guarantees is not exceeded.

In the multiplex transmission fire receiver according to claim 5 of the present invention, the delay timer means is provided for each repeater instead of being provided in the multiplex transmission fire receiver. , The delay timer means
The same effect as can be obtained.

In the multiplex transmission fire receiver according to claim 6 of the present invention, when the signal processing unit executes the continuity confirmation polling operation after a predetermined time has elapsed, the fire detection polling operation is already executed. Is being done,
Since the continuity confirmation polling operation is executed after waiting for one cycle of the fire detection polling operation to be completed, it is possible to reliably perform fire monitoring.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view of the entire fire alarm system using the multiplex transmission type fire receiver of the present invention, and FIG.
It is an internal block diagram of the multiplex transmission fire receiver of this invention.

This system is based on the multiplex transmission fire receiver 1.
A monitoring line L composed of multiple signal lines is led out, and a repeater 2 in which a fire detector 3 is connected to this monitoring line L
.. is the same as the fire alarm system (see FIG. 4) described above as a conventional example, but in the present invention, the multiplex transmission fire receiver 1 or the repeater 2 is used. By controlling the delay timer means 4 set to one of the two, the delay timer means 4 is set to a time that does not exceed the guaranteed number of switching operations for the product life of the switching relay 21 of the relay 2 regardless of the number of the relays 2 installed. It is characterized in that the product life of the relay 21 can be secured. Hereinafter, they will be sequentially described.

As shown in FIG. 2, the multiplex transmission fire receiver 1 transmits a fire monitoring signal and a continuity monitoring signal of a predetermined format in which the communication addresses assigned to the delay timer means 4 and the repeater 2 are designated. A multiplex transmission control unit 5 that receives a reply signal from the repeater 2 and a signal processing unit 6 are provided.

The delay timer means 4 manages each repeater 2 and is activated when the fire detection polling operation is started to measure the execution time of the fire detection polling operation for each repeater 2. .

The delay timer means 4 can set a predetermined time T in advance, and the predetermined time T means a time within which the switching operation guaranteed number of times of the product life of the switching relay 21 of the repeater 2 is not exceeded. There is.

Here, the predetermined time T is set to a value obtained by dividing the product life of the switching relay 21 by the guaranteed number of switching operations.

For example, as in the above example, the maximum number of addresses of the repeater 2 is 51, the cycle for completing all fire detection polling of these repeaters is 4 seconds, and the life of the switching relay 21 is 10 years. , The number of guaranteed switching operations is 10
In the case of a fire system that is 0,000 times, the predetermined time T of the delay timer means 4 is set to 10 years ÷ 1,000,000 = 316 seconds.

As described above, since the predetermined time T can be set by the delay timer means 4, even if the number of repeaters 2 installed is small (for example, 51 addresses), the guaranteed number of times of switching operation, which is the product life of the switching relay 21, ( (For example, 1 million times)
Never exceeds.

Further, the multiplex transmission type fire receiver 1 in this embodiment is provided with the individual delay timer means 4 for each repeater 2 and counts the elapsed time for each repeater 2. The delay timer means 4 may be provided on the repeater 2 side, and in this case, the delay timer means 4 provided on the repeater 2 side counts its own elapsed time and transmits it to the multiplex transmission fire receiver 1. Reply to.

During the fire detection polling operation, the multiplex transmission control unit 5 transmits the fire monitoring signal with the designated address to all the repeaters 2 in the system connected to the monitoring line L in a time division manner. However, when the reply signal returned from the designated repeater 2 is received, and during the continuity confirmation polling operation, the fire monitoring in which addresses are designated for the individual repeaters 2 in the system connected to the monitoring line L The signal is transmitted and the reply signal returned from the repeater 2 is received.

When the signal processing unit 6 operates the multiple signal transmission control unit 5 to start the fire detection polling operation for all the repeaters 2, ..., The delay timer means 4 is activated to start the fire. Repeater 2 for all detection polling operations
After one cycle for ..., the first repeater (# 1)
With respect to 2, the delay timer means 4 is referred to and the elapsed time TM after starting the fire detection polling operation is measured and compared with a preset predetermined time T.

As a result of the comparison, when the elapsed time TM exceeds the predetermined time T, the first repeater (# 1)
While the continuity confirmation polling operation of No. 2 is started, when the elapsed time TM does not exceed the predetermined time T, the continuity confirmation polling operation is started after the fire detection polling operation is repeatedly performed until the predetermined time T is exceeded. Then, when this continuity confirmation polling operation is completed, the delay timer means 4 for the first repeater (# 1) 2 is restarted. After that, in the same manner, the repeaters (# 2 to #N) are sequentially provided.
For the above, the continuity confirmation polling operation is repeated.

A unique communication address is assigned to each of the repeaters 2, and the monitoring line L is connected to the fire detection circuit 22 or the continuity confirmation circuit 23 via the switching relay 21.

The switching relay 21 includes a monitoring line L derived from the multiplex transmission type fire receiver 1 and the detection circuits 2 for both of the above.
A fire monitoring signal transmitted from the multiplex transmission fire receiver 1 by designating a communication address assigned to itself by switching the connection with the radio communication terminals 2 and 23.
When receiving the continuity monitoring signal, the monitoring line L and the fire detection circuit 2
2. The monitoring circuit L and the continuity detection circuit 23 are connected.

The fire detection circuit 22 detects an alarm on the fire detector line to which the fire detector 3 is connected and added, and
The continuity confirmation circuit 23 sends a test current to the fire detector line to which the fire detector 3 is connected and added, and determines the voltage level generated in the fire detector line at that time to determine whether or not the fire detector line is broken. is doing.

FIG. 3 is a flow chart showing the polling operation of the present invention.

In the present invention, fire detection and continuity confirmation are performed by the following polling operation.

The multiplex transmission type fire receiver 1 starts the fire detection polling via the monitoring line L and, at the same time, activates the delay timer means 4 to measure the execution time of the fire detection polling operation.

If a fire is detected during this fire detection polling, the address of the corresponding repeater 2 is displayed on the multiplex transmission fire receiver 1 to notify the fire (S1 to S).
4). Similarly, the fire detection polling of the next repeater (# 2) 2 is performed, and this is repeated until the fire detection polling for all the repeaters 2 ...
5 to S7).

Then, when the fire detection polling operation for all the repeaters 2 ... Is completed once, the elapsed time TM and the delay timer means 4 are set for one repeater (# 1) 2. When the elapsed time TM exceeds the predetermined time T as a result of the comparison and determination, the switching relay 21 of the repeater (# 1) 2 is connected to the conduction confirmation confirmation circuit 23 side. (S10), the continuity confirmation polling is started and executed, but when the elapsed time TM has not passed the predetermined time T, the fire detection polling operation is further performed, and the elapsed time TM passes the predetermined time T. Up to S8 to S11.

It should be noted that after the predetermined time T has elapsed, the repeater 2
When the switching relay 21 is switched to the continuity confirmation confirmation circuit 23 side, if the fire detection polling operation has already been executed, the switching is executed after waiting for one cycle of the fire detection polling operation to be completed.

Next, the multiplex transmission type fire receiver 1 starts the continuity confirmation polling operation via the monitoring line L for one repeater (# 1) 2, and confirms the continuity failure during this continuity confirmation polling. For example, the corresponding repeater (# 1) 2
The address is displayed on the multiplex transmission fire receiver 1 to notify the defect (S11 to S13).

On the other hand, if no continuity failure is confirmed in the repeater (# 1) 2 during the continuity confirmation polling, the repeater (# 1) is once reset for a predetermined time T and restarted, and the counting is performed again. When started, the repeater (# 1) 2
The switching relay 21 of is switched to the fire detection circuit 22 side (S
14).

In the same manner, the repeaters (# 2 to #
N) Repeat this until the continuity confirmation polling for 2 ... is completed (S15 to S17), and when the continuity confirmation polling for all the relays 2 ... Is completed,
Continuity confirmation polling for the first repeater (# 1) 2 is performed again, and by repeating these operations, fire detection and continuity confirmation by the polling method are performed (S1).
8).

[0046]

As can be understood from the above description, according to the polling-type fire detection method and the continuity confirmation method according to claim 1 of the present invention, every repeater repeats every fire detection polling operation. In the basic operation of interrupting the continuity confirmation polling operation, the time is started at the start of the fire detection polling operation, and after one round of the fire detection polling operation is completed, the elapsed time is the predetermined time of one repeater. The step to compare and judge is added.

Then, as a result of the comparison judgment, when the elapsed time exceeds the predetermined time, the continuity confirmation polling is started and executed. However, when the elapsed time does not reach the predetermined time, the fire detection is further performed. After repeating the fire detection polling operation until the elapsed time exceeds the specified time, the continuity confirmation polling operation is started, and when the continuity confirmation polling operation is completed, the elapsed time is re-timed and thereafter. In the same manner, the continuity confirmation polling operation is repeated for each repeater.

Therefore, unless the predetermined time elapses, the continuity confirmation polling is not started immediately after the completion of the fire detection polling, and the number of switching operations of the switching relay is set regardless of the number of relays installed and the life of the product. It is possible to ensure that the number of switching operation guarantees is not exceeded.

According to the polling type fire detection method and the continuity confirmation method of the second aspect of the present invention, the same effect as that of the first aspect can be obtained by the switching control in the repeater.

According to the polling type fire detection method and the continuity confirmation method of the third aspect of the present invention, when the continuity confirmation polling operation is executed after a predetermined time has elapsed, the fire detection polling operation has already been executed. When the fire detection polling operation is being performed, the fire confirmation polling operation is executed by waiting until the fire detection polling operation is completed once.

According to the multiplex transmission fire receiver of the fourth aspect of the present invention, the multiplex transmission signal is transmitted to and received from the repeater to issue an alarm or fire of the fire detector line connected to the repeater. In the multiplex transmission type fire receiver that is designed to determine the disconnection of the sensor line, operate the multiple signal transmission control unit to manage each relay when starting the fire detection polling operation for all the relays. Start the delay timer means,
After the fire detection polling operation has been completed for all the repeaters, the elapsed time from the start of the fire detection polling operation by the delay timer means is measured for one repeater, and a predetermined preset value is set. A signal processing unit for comparing with time is provided.

As a result of the comparison, when the elapsed time exceeds the predetermined time, the continuity confirmation polling operation is started, while when the elapsed time does not exceed the predetermined time, the fire detection is continued until the predetermined time is exceeded. After repeating the polling operation, the continuity confirmation polling operation is started, and when the continuity confirmation polling operation is completed, the delay timer means is restarted, and thereafter, in the same manner, the continuity confirmation polling operation is sequentially performed for each repeater. I am trying to repeat.

Therefore, the continuity confirmation polling is not started immediately after the completion of the fire detection polling until the predetermined time elapses, and the number of switching operations of the switching relay can be set regardless of the number of relays installed. It is possible to ensure that the number of switching operation guarantees is not exceeded.

According to the multiplex transmission fire receiver of the present invention, the delay timer means is provided for each repeater instead of being provided in the multiplex transmission fire receiver. With this delay timer means, it is possible to obtain the same effect as that of the fourth aspect.

According to the multiplex transmission fire receiver according to the sixth aspect of the present invention, when the signal processing unit executes the continuity confirmation polling operation after a predetermined time has passed, the fire detection polling operation has already been performed. When the fire detection polling operation is performed, the fire detection polling operation is waited until one round is completed, and the continuity confirmation polling operation is executed. Therefore, it is possible to reliably perform fire monitoring.

[Brief description of drawings]

FIG. 1 is a schematic diagram of the entire fire alarm system using the multiplex transmission fire receiver of the present invention.

FIG. 2 is an internal configuration diagram of the multiplex transmission fire receiver of the present invention.

FIG. 3 is a flowchart showing a polling operation of the present invention.

FIG. 4 is a schematic diagram of the entire fire alarm system using a conventional multiplex transmission fire receiver.

FIG. 5 is a flowchart showing a conventional polling operation.

[Explanation of symbols]

1 ... Multiplex transmission fire receiver 2 ... Repeater 3 ... Fire detector 4 ... delay timer means 5 ... Multiplex transmission control unit 6 ... Signal processing unit

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5C087 AA02 AA03 BB02 BB51 BB54                       BB65 BB74 CC05 CC22 DD04                       DD20 EE09 GG12 GG30 GG32                       GG35 GG54                 5G405 AA03 CA09 CA15 CA20 DA16                       EA16 EA31

Claims (6)

[Claims] 1. A fire monitoring signal in which a communication address is designated is cyclically sent from a fire receiver to a plurality of repeaters in a system to which a fire detector is connected, and a reply signal to the fire monitoring signal is received. Then, after completing one round of the fire detection polling operation for making a fire judgment, it is determined whether or not the elapsed time that has started the time measurement at the start of the fire detection polling operation exceeds a predetermined time for one repeater, and the predetermined time When the time has passed, the continuity confirmation polling is performed to send the continuity monitoring signal specifying the same communication address to the repeater and receive the reply signal to determine the continuity abnormality between the repeater and the fire detector. On the other hand, if the specified time has not elapsed while performing the operation, after repeating the fire detection polling operation until the specified time is exceeded, The present invention is characterized in that the confirmation polling operation is started, and when the continuity confirmation polling operation is completed, the re-counting of the elapsed time is started, and thereafter, the continuity confirmation polling operation is repeated for each repeater in the same manner. Polling fire detection method and continuity confirmation method. 2. The fire detection polling operation and the continuity confirmation polling operation according to claim 1, wherein the switching control is performed by turning on and off a switching relay provided in a repeater, and the predetermined time is A polling-type fire detection method and a continuity confirmation method that are set based on a time that does not exceed the guaranteed number of switching operations for the product life of the switching relay. 3. The fire detection polling according to claim 1, wherein when the fire confirmation polling operation is already performed when the continuity confirmation polling operation is performed after the predetermined time has elapsed. A polling-type fire detection method and a continuity confirmation method in which a continuity confirmation polling operation is executed after waiting for one cycle of the operation to be completed. 4. A fire detector connected to a repeater by deriving a monitoring line connecting a plurality of repeaters, each of which is assigned a unique communication address, transmitting and receiving a multiplex transmission signal to and from the repeater. In a multiplex transmission fire receiver that detects line alarms and continuity abnormalities, a fire monitoring signal of a prescribed format that specifies the delay timer means to manage each repeater and the communication address assigned to the repeater. And a signal processing unit for transmitting a continuity monitoring signal and receiving a reply signal from the repeater to perform a fire detection polling operation and a continuity confirmation polling operation. When the signal transmission control unit is operated to start the fire detection polling operation for the repeater, the delay timer means is activated to complete one cycle of the fire detection polling operation, and then 1 For the repeater, the elapsed time measured by the delay timer means is compared with a preset predetermined time, and as a result of the comparison, when the elapsed time exceeds the predetermined time, the continuity confirmation polling operation is started, while the elapsed time is elapsed. When the time does not exceed the predetermined time, after repeating the fire detection polling operation until the predetermined time is exceeded, the continuity confirmation polling operation is started, and when the continuity confirmation polling operation is completed, the delay timer means is set. A multiplex transmission fire receiver characterized in that after restarting, the above-mentioned continuity confirmation polling operation is repeated for each repeater in the same manner. 5. The multiplex transmission fire receiver according to claim 4, wherein the delay timer means switches between the fire detection polling operation and the continuity confirmation polling operation for each repeater. Instead of the above, it is provided for each repeater, and the above-mentioned predetermined time is set based on a time that does not exceed the guaranteed number of switching operations for the product life of the relay for the above-mentioned switching. Receiving machine. 6. The fire detection polling operation according to claim 4, wherein the signal processing unit has already executed the fire detection polling operation when executing the conduction confirmation polling operation after the predetermined time has elapsed. Occasionally, the multiplex transmission fire receiver is configured to wait for the fire detection polling operation to be completed once before executing the continuity confirmation polling operation.