JPH064784A - Disaster prevention panel for tunnel - Google Patents

Abstract

PURPOSE:To obtain the disaster prevention panel which decides as a fire at the time when only a detector of an adjacent block detects a fire in the case of a pre-alarm existence system, and also, can be operated in either system of the pre-alarm existence system or a pre-alarm non-existence system without providing a timer unit, and whose constitution is simple. CONSTITUTION:A first fire deciding means 16 for performing as a pre-alarm non-existence system and a second fire deciding means 17 for performing as a pre-alarm existence system are provided, and based on a switching state of a switching means 18, either system can be performed, therefore, it is possible to correspond easily to either of the pre-alarm non-existence system and the pre-alarm existence system. Also, in the case of the pre-alarm existence system, a second fire deciding means 17 decides whether a detecting pulse is a detecting pulse from a detector in the same block or its adjacent block or not, and decides as a fire only at the time when it is decided to be the adjacent block or the same block.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster prevention board for a tunnel, and more particularly to a disaster prevention board which can easily judge the fire occurrence status in a predetermined section by either a method without a preliminary alarm or a method with a preliminary alarm.

[0002]

2. Description of the Related Art For example, as a method of detecting a disaster prevention board for monitoring a fire in a tunnel, there are generally a method without a preliminary alarm and a method with a preliminary alarm. The method without a preliminary alarm is a method in which when a detection pulse satisfying a predetermined condition is input from a detector of a predetermined section in a tunnel a predetermined number of times at a predetermined interval, the section is determined to be a fire.

The method with a preliminary alarm is provided with a timer unit, and when a detection pulse satisfying a predetermined condition is input from a detector in any section in the tunnel a predetermined number of times at a predetermined interval, the timer unit causes the section to enter the section. Is a preliminary alarm state, and a detection pulse is input again under the same conditions, and if the above conditions are satisfied, a fire is determined.

A user generally decides either the method without the preliminary alarm or the method with the preliminary alarm.

As for the system configuration, a centralized type for centrally monitoring the disaster prevention panel and several relays having the same function as the disaster prevention panel in the tunnel are arranged to share the function of the disaster prevention panel. There is a distributed type. Further, there are two types of line systems, a P type that uses a dedicated line for each partition, and an R type that uses a common line for a plurality of partitions. Although there is such a complicated system, in this description, a disaster prevention board with a centralized type and a P-type line will be described as an example.

FIG. 11 is a schematic configuration diagram of a disaster prevention board to which the conventional method without a preliminary alarm is centrally applied. In the figure, 1
Is a tunnel, and k _{1 to} kn are detectors attached at predetermined intervals for each predetermined section (in this case, J ₁ , J ₂ , ..., Jm, ... Jn). In this case 50
It is assumed that two detectors are arranged for each section of m. The detector is of dual wavelength type. 2 is a disaster prevention board, 3a-3
m is a receiving circuit provided for each section, and 4a to 4m are provided for each section, and a filter (for example, an integrating circuit) provided to remove noise components of output signals from the receiving circuits 3a to 3m Is.

Fire judging circuits 5a to 5m are provided corresponding to each section. The fire judging circuits 5a to 5m receive detection pulse signals from the filters 4a to 4m at predetermined intervals. If a signal is input again under the same conditions after a predetermined time has elapsed, a signal indicating a fire (hereinafter referred to as a fire signal) is output for a predetermined time.

Reference numeral 7 outputs a signal notifying that the section is a fire or a signal to a control circuit of a water spray extinguisher (not shown) in accordance with the input of a fire signal from at least the fire determination circuit 5a to the fire determination circuit 5m. An output circuit that outputs
8 is a printer that prints based on the output signal from the output circuit 7, 9 is an alarm device, 10 is a display device, and 11 is based on the output signal from the output circuit 7 that a fire has occurred and is remotely controlled. It is a communication control unit that outputs an instruction from the station to the disaster prevention panel 2.

The operation of the conventional method without a preliminary alarm configured as described above will be described below.

When any of the detectors k ₁ to km of the sections J ₁ to Jm in the tunnel detects a fire, a receiving circuit provided corresponding to the section receives a signal from the detector. , Output to the corresponding filter.

[0011] For example, the detectors k ₁ compartment J ₁ detects the fire, detection pulse signal outputs, and received by the receiving circuit 3a having corresponding to the partition, the corresponding filter 4
output to a.

Next, the fire determination circuit in that section outputs, for example, 2 pulses at a predetermined interval for the detection pulse signal input,
When a detection pulse signal having the same condition is input again after a predetermined time has elapsed, a fire signal is output to the terminal of the output circuit 7.

Then, the output circuit 7 adds a signal notifying the section to the fire signal of the fire judging circuit and uses it as a fire occurrence signal as a printer 8, an alarm device 9, a display device 10, a communication control section 11, a water spray control circuit and the like. Was output to.

That is, in the method without a preliminary alarm, when at least one of the detectors in the tunnel outputs a detection pulse signal satisfying a predetermined condition, it is determined that a fire has occurred and a road management office is notified. Was being processed.

FIG. 12 is a schematic configuration diagram of a disaster prevention board to which the conventional method with a preliminary alarm is centrally applied. In the figure,
1 to 11 are the same as those in FIG. Reference numeral 12 is a timer unit. An OR circuit 13 inputs the detection pulse signals from the filters 4a to 4m and outputs a logical sum output signal to the timer unit 12.

For example, when a fire signal is input from the fire judging circuit 5a of the section J ₁ , the timer unit 12 sets the section as a preliminary alarm state and outputs a preliminary warning signal to the output circuit 7.
It is output to the terminal corresponding to the section of (1) to display the warning light. Then, after a lapse of a predetermined time, a timer (not shown) is operated, and the number of outputs of the OR circuit 13 is equal to or more than a predetermined number within the predetermined time counted by the timer, and the fire signal is input again from one of the fire determination circuits. Then, a fire occurrence signal determined to have occurred is output to the output circuit 7.

Further, for example, after the fire determination circuit 5a provided corresponding to the section J ₁ outputs a fire signal and puts it in a preliminary alarm state, the number of outputs of the OR circuit 13 is a predetermined number within a predetermined time counted by the timer. With the above, when a fire signal is input from the fire determination circuit 5b provided for the section J ₂ ,
The fire occurrence signal is output to the terminals corresponding to the sections J ₁ and J ₂ of the output circuit 7.

Further, for example, after the fire determination circuit 5a provided corresponding to the section J ₁ outputs a fire signal to enter the preliminary alarm state, OR is performed within a predetermined time counted by the timer.
When the number of outputs of the circuit 13 is a predetermined number or more and a fire signal is input from the fire determination circuit 5m provided corresponding to the section Jm, the fire occurrence signal is output to the terminals of the output circuit 7 corresponding to the sections J ₁ and Jm. Output.

Furthermore, if a fire signal is input from another section after it is determined that there is a fire, the fire signal is immediately output to the terminal corresponding to that section.

That is, in the case of the system with a preliminary alarm, a timer unit is attached, and when a signal satisfying a predetermined condition is input from one detector, a preliminary alarm state is set, and then the same section or an adjacent section or another section is set. When the detector outputs a detection pulse signal that satisfies a predetermined condition, it is determined that a fire has occurred. Such an operation was the same in the distributed type described above.

[0021]

The conventional disaster prevention board as described above is equipped with a fire judging circuit corresponding to a predetermined section so as to judge the occurrence of a fire. The number is extremely large, and multiple fire judgment circuits must be provided correspondingly. Therefore, there is a problem that the number of parts in the disaster prevention board increases and the cost increases.

When the user requests the system without the preliminary alarm, it is not necessary to mount the timer unit, but when the system requires the system with the preliminary alarm, the timer unit must be mounted. There was a problem that it was costly.

In the case of the system with a preliminary alarm, when the detector outputs a detection pulse satisfying a predetermined condition a predetermined number of times and then a detection pulse of the same condition is input again, the timer unit is set to the preliminary alarm state, While the timer unit was counting for a predetermined time, if a detection pulse of the same condition was input from another detector, it was determined that a fire had occurred. For example, one detector in the J _1st section was fired. Is detected and even if the Jmth detector other than the continuous section detects a fire, it is judged as a fire.

Generally, one section is set to 50 m, and a plurality of, for example, two-wavelength type detectors are arranged between them. For example, if a car etc. in the J _1st section has a fire, first, One detector in the compartment detects a fire occurrence, and the next detector always detects a fire occurrence.

Alternatively, when the J ₁ -th k ₂ detects a fire, the first detector k _{3 of} the adjacent section J ₂ always detects the fire occurrence.

Therefore, when two detectors are arranged in one section, when two detectors detect the occurrence of a fire in the same section, it is determined that a fire has occurred or a detector in an adjacent section. When each of them detects a fire, it should judge that it is a fire, and the method with a preliminary alarm is configured for this purpose.

However, in any case, if a detection pulse satisfying a predetermined condition is input after the preliminary alarm state is determined, it is determined that a fire has occurred.
Even if a detector in a section other than the adjacent section has detected a fire due to a cause other than a fire, it is determined that a fire has occurred.

That is, when a fire really occurs, the detectors of the same or adjacent sections detect the occurrence of the fire, but conventionally, even if the sections are not continuous, if there are two or more outputs of the fire, the fire will occur. Since there is a possibility that a fire may occur due to an erroneous detection, there is a problem that the original purpose of the system with a preliminary alarm cannot be achieved.

The present invention has been made to solve the above problems, and in the case of a system with a preliminary alarm, when a plurality of detectors in the same section detect a fire or only detectors in adjacent sections are fired. It is an object to obtain a disaster prevention board which is judged to be a fire when it is detected, and which can operate with a system with a preliminary alarm or without a preliminary alarm without a timer unit and has a simple structure.

[0030]

A disaster prevention board according to the present invention comprises a switching device for switching between a system without a preliminary alarm and a system with a preliminary alarm, and switching means for sending the switching state of the switching device, When the method without a preliminary alarm is selected, when a detection pulse satisfying a predetermined condition is input from each of the detectors arranged in each section, a first fire determination unit that determines the section as a fire, When the method with the preliminary alarm is selected, if a detection pulse that satisfies a predetermined condition is input from the detector in the section, the section is set to the preliminary alarm state, and when the detection pulse is input under the same condition thereafter, It is provided with a second fire judging means for judging whether the detection pulse is in the same section or an adjacent section as the section concerned, and judging that it is a fire when it is judged that the section is the same section or the adjacent section. A. Further, the second fire determining means determines, when a detection pulse satisfying a predetermined condition is input from the detector of the adjacent section of the predetermined section after determining that the predetermined section is a fire, the second section is adjacent to the predetermined section. It has a function to determine that a fire.

Further, the first fire judging means carries out arithmetic processing by a program without a preliminary warning and the second fire judging means by a program with a preliminary warning.

[0032]

In the present invention, when the switching state of the switching means is the system without a preliminary alarm, the first fire judging means inputs a detection pulse satisfying a predetermined condition from the detectors arranged in each section. Then, the section is determined to have a fire.

Further, when the switching state is a system with a preliminary alarm, when the second fire judging means inputs a detection pulse satisfying a predetermined condition from the detector in the section, the second fire judging means puts the section in the preliminary alarm state. Then, after that, when a detection pulse is input under the same condition, it is determined whether or not the detection pulse is output by the detector from the same section or the adjacent section. Next, when it is determined that the determination result is the same section or the adjacent section, it is determined that the fire.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a conceptual diagram of a disaster prevention board for a tunnel according to the present invention. In the figure, reference numeral 18 is provided with a system changeover switch 18a for switching to a system with a preliminary alarm or a system without a preliminary alarm by operation, and an A / D etc. for outputting the system switching signal as system data of a predetermined bit. It is a method switch board.

Reference numeral 15 is a method selecting means for selecting either a method without a preliminary alarm or a method with a preliminary alarm based on the switching state of the method changeover switch 18a, and 16 is a first fire judging means, a method without a preliminary alarm. When is selected,
When a detection pulse satisfying a predetermined condition is input from each of the detectors arranged in each predetermined section based on the program of the system without a preliminary alarm, the section is determined to have a fire.

Reference numeral 17 is a second fire judging means, and when the method with a preliminary alarm is selected, a detection pulse satisfying a predetermined condition is input from the detectors in the compartment based on the program with a preliminary alarm. Sometimes it is judged as a preliminary alarm state,
After that, when a detection pulse that satisfies a specified condition is input from a detector from the same section or another section, the location of the detector and the detector that first output the detection pulse is the same section or the adjacent section. If it is determined that it is the same section or an adjacent section, it is determined as a fire.

In addition, after it is determined that a predetermined section is a fire,
When a section adjacent to the predetermined section is in the preliminary alarm state, the section is determined to be a fire.

A specific example of the disaster prevention board constructed on the basis of the above concept of the invention will be described below.

FIG. 2 is a schematic diagram showing an embodiment of the present invention applied to a centralized type. In the figure, 1 to 18 are the same as above. 25 is a method switch board 18
The I / Fs 26a to 26m for use are, for example, a fire determination unit provided for every 10 sections. Reference numeral 27 is an MPU that interprets the method and implements the first fire determination means or the second fire determination means for each section. Reference numeral 28 is a ROM that stores at least a program for interpreting the selection signal and designating a program number in a predetermined memory area, a program without a preliminary alarm, and a program with a preliminary alarm. Also,
The ROM 28 stores a correspondence table for determining the section in the tunnel.

Numeral 29 inputs the detection pulse signals from the filters 4a to 4m corresponding to each of the ten sections and receives the MPU2.
Reference numeral 7 is an I / F circuit that makes a readable signal, and 30 is an I / F circuit that stores the fire occurrence signal or the preliminary alarm signal of the MPU 27 of the fire determination unit 26 for each section and interfaces with the main MPU 31.

Reference numeral 31 is a main MPU. Main MPU
31 is at least the system changeover switch 18a based on the system program in the ROM 32 when the power is turned on.
Method read means for storing and reading the state of RAM 33 in the RAM 33, method judging means for judging the method, and a selection signal for selecting either the program without preliminary alarm or the program with preliminary alarm based on the method judgment 26a-26
It serves as a selection signal output means for sending to m.

When the determination result of the system determining means is the system without preliminary alarm, the determination result from the fire determining unit is read based on the program without preliminary alarm in the ROM 32 and output to each unit. Further, in the case where the determination result of the system determination means is the system with a preliminary alarm, when the adjacent sections of the fire determination unit are in the preliminary alarm state, it is determined as a fire.

The operation of the disaster prevention board constructed as described above will be described below. FIG. 3 is a flow chart for explaining the method selection operation.

When the power is turned on, the main MPU 31 of the disaster prevention board 2 makes initial settings such as checking each part (S30).
1).

At this time, the other MPUs perform the same processing. Next, if normal, the method reading means of the system program is designated, and the method reading means indicates the switching state of the method changeover switch 18a of the method changeover switch substrate 18 in the RAM 33.
(S302). Next, the method determining means is designated, and the method determining means sets the method data stored in the RAM 33 in the register (S303), compares the determination criteria stored in advance with the method data, and determines whether the method has a preliminary alarm. Alternatively, it is determined whether there is no preliminary alarm system (S304). Then, the selection signal output means is designated, and the selection signal output means outputs a selection signal for selecting a program with a preliminary alarm (hereinafter, referred to as a first program with a preliminary alarm) when the determination result is a system with a preliminary alarm. I / F circuit 30a-
It transmits to the MPU of the fire determination part 26a-the fire determination part 26m via 30m (S305), and based on a selection signal after that, a program with a preliminary warning of ROM32 (following 2nd
Of the program with a preliminary alarm) is designated (S30
6).

When the result of the determination in step S304 is the method without a preliminary alarm, a selection signal for selecting a program without a preliminary alarm (hereinafter referred to as a first program without a preliminary alarm) is sent to the MPU of each fire determination unit. (S30
7) Based on the selection signal, a program without a preliminary alarm in the ROM 32 (hereinafter referred to as a second program without a preliminary alarm) is designated (S308).

Next, the operation of the fire judging section 26a according to the present invention will be described. First, when the selection signal is input to the fire determination unit 26a, the system selection unit 15 interprets the selection signal, and if the selection signal indicates the system without preliminary alarm, the ROM
28 programs without first preliminary alert are specified. In the case of the system with a preliminary alarm, the program of the first system with a preliminary alarm is designated.

4 to 6 are flow charts showing the operation of the first program without the preliminary alarm. In this case, only the fire determination unit 26a will be described, and the system changeover switch 18a is switched to the side without a preliminary alarm,
It is assumed that the head address (the program counter IP is set to the program number) of the program without the preliminary alarm in the ROM 28 is designated by 27.

First, the MPU 27 makes an initial setting for setting the number of partitions Ji, each timer value, each counter value, etc. based on the program of the ROM 28 without the preliminary alarm (S).
401). For example, it is set based on the set value of the DIP switch or the like.

Next, the preset monitoring timer Tk for sampling is started (S402), and the I /
The detection pulse signals from the receiving circuit 3a to the receiving circuit 3m (= 10) for 10 sections from the F circuit 29 are read and stored (S).
403). Next, it is determined whether the monitoring timer Tk has passed, for example, 5 seconds (S404), and the detection pulse signal of each section is sampled at a predetermined cycle and read and stored until 5 seconds have passed.

Next, when the monitoring timer Tk has elapsed for 5 seconds, the monitoring timer Tk is stopped (S405), the waiting time timer Tu (called a wait timer) is started (S406), and the reading is stopped (S406). S407). Next, the partition number Ji is set to Ji = 0 (S408), and the first partition is designated (S409). And the designated section J
The detection data of i is determined (S410).

Next, the detection data of the section Ji is 1 or 0.
It is determined (S501). In this case, the first section J
It is assumed that the detection data of i = 1 is 1. Next, when the detection data is 1, the detection pulse width counter Cwji for counting the detection pulse width of the section Ji is counted (S502). Then, it is determined whether the monitoring timer Tk has determined the detection data for 10 sections read during operation (S503). Next, when the determination is not made for 10 sections, the process moves to step S409 to specify the next section (Ji = Ji + 1). In this case, it is assumed that only the detector in the first section outputs the detection pulse signal.

Next, the partition is updated, and step S501
When it is determined that the detection data is 0, the detection data is 1
→ It is determined whether or not it has changed to 0 (S505). In this case, since only the detector in the first section is outputting the detection pulse signal, it is determined that the change is from 0 to 0, and whether or not the detection pulse width counter Cwji in the section Ji is operating. Is determined (S507). In this case, since the detection pulse is not input as 1 from the section (Ji = 2), it is determined that the detection pulse width counter Cwji is not operating, and the control is moved to step S503. Such an operation is carried out for 10 sections.

Next, when it is determined in step S503 that the detection data for 10 sections has been determined, it is determined whether the wait timer Tu has reached a predetermined value (S50).
9) If it has not arrived, it is determined whether or not a fire determination has been made for each of the 10 divisions (S510). If no fire determination has been made, control is transferred to step S408, and the same processing as above is executed. To do.

Then, when the above-described processing is repeated a predetermined number of times and the detection data of the first section changes to 0 in step S501, it is determined in step S505 that the Ji detection data has changed from 1 to 0. Next, it is determined whether or not the detection pulse width counter Cwji of the section Ji has a value corresponding to 100 ms to 250 ms (S512). Next, when it is determined that the detection pulse width corresponds to 100 ms to 250 ms, the detection pulse is validated, and the detection pulse valid counter Cuji of the section Ji counts (S5).
13). Next, the detection pulse effective counter Cu of the section Ji
It is determined whether the count value of ji is 1 (S514),
When it is 1, the timer Tp for the detection pulse interval of the section Ji
ji is started (S515), the detection pulse width counter Cwji for the section Ji is reset (S516), and control is passed to step S503. And step S again
If it is determined in 501 that the detection data of the section of Ji = 1 is 0, it is determined in step S505 that the detection data of the section of Ji = 1 has changed from 0 → 0, and in step S507.
Then, it is determined that the detection pulse width counter Cwji of the section Ji is operating.

Next, it is determined whether 1.7 seconds have elapsed since the detection pulse interval timer Tpji started (S
518). In this case, the detection pulse interval timer Tpj
It is determined that 1.7 seconds have not elapsed since i started, and the control is moved to step S503. When it is determined in step S505 that 0 → 0 is changed, and in step S507 that the detection pulse width counter Cwji is in operation for 1.7 seconds, that is, after a predetermined detection pulse is output once,
If the detection pulse is not input with a predetermined pulse width even after 1.7 seconds have elapsed, an error is detected and the detection pulse width counter C is used.
wji is reset (S519), and control is performed in step S5.
Control is transferred to 03.

When the detection data of the section Ji = 1 is changed to 1 after the predetermined processing by executing the above processing, the detection pulse width counter Cwj is determined in step S502 as described above.
i starts counting. Then, after a predetermined step S
When the detection data of the section Ji is detected as 0 in 501, if the detection pulse width counter Cwji of the section Ji has a value corresponding to 100 ms to 250 ms in step S512, the detection pulse valid counter Cwji counts. That is, in the process of this processing, two detection pulses are counted as valid for the first section Ji = 1.

Next, when it is determined in step S514 that the detection pulse valid counter Cuji is not 1, it is determined whether the count value is 2 (S601). When the count value is 2, the detection pulse interval timer Tpji = 1.7.
Second (S602), and if it is 1.7 seconds, the section Ji
The fire determination counter Ckji counts (S60
3). That is, during the monitoring time Tk (5 seconds in this case), Cwji (100 ms to 250 ms in this case)
Of the detection pulse having the width of Tpji (1.7 in this case).
If there are 2 pulses in seconds, the fire determination counter Ckji counts. The time chart of this relationship is shown in FIG.

Next, it is determined whether or not the fire determination counter Ckji is 2 (S604), and if it is not 2, the control is moved to step S503 and the same processing as described above is performed. In this case, the count value is 1.

Next, when the fire determination counter Ckji is 1, the control is moved to step S503 and the same processing is performed. When it is determined in step S509 that the wait timer Tu has reached the predetermined value, the second monitoring time is set in the monitoring timer Tk (S520), the control is moved to step S402, and the same processing as described above is performed. carry out.

If the fire determination counter Ckji is 2 in step S604, it is determined that the section Ji is a fire (S605), and the determination result is output (S606).
That is, during the monitoring time Tk (5 seconds in this case), Cw
The detection pulse having a width of ji (100 ms to 250 ms in this case) is 2 at an interval of Tpji (1.7 seconds in this case).
If there is a pulse and the detection pulse width of the same interval after the wait time is two pulses within the second monitoring time, the section is regarded as a fire.

If it is determined in step S512 that the detection pulse width counter Cwji is 250 ms or more, the detection pulse width counter Cwji is 250 ms or more.
It is determined whether or not the value corresponds to 300 ms (S61
0), if it is a corresponding value, it is determined whether or not there are a predetermined number of pulses at a predetermined interval within a predetermined time, as described above, and two detectors in the section Ji operate, that is, multiple detectors in the same section. Since the detector of No. 2 is operating, processing for making the section Ji a fire is performed (S620).

FIG. 7 is a flow chart for explaining the program with the first preliminary alarm. Similar to FIG. 4 to FIG. 6 described above, after initial setting and the like, 100 ms within the monitoring time Tk.
~ 250ms pulse width, 2 with 1.7s pulse interval
One detection pulse is output, and after that, when two detection pulses are output from the section under the same condition after the wait time has elapsed, the fire determination counter Ckji counts 2 Steps S401 to S603 (S610 and S6)
The processing of 20 is included (S701). Next, it is determined whether or not the fire determination counter Ckji of the section Ji has reached 2 (S702), and when it has not reached 2, the control proceeds to step S503 described above. Then, after carrying out the processing as shown in FIGS.
When the fire determination counter Ckji for the section Ji is determined to be 2 in 02, the section Ji is determined to be in the preliminary alarm state, and the determination result is output (S703).

Next, the partition and the judgment result are stored (S70
4), the preliminary alarm counter Cyji counts (S7
05).

Next, it is determined whether or not the preliminary alarm counter Cyji has reached 2 (S706). In this case, the count value of the preliminary warning counter Cyji is 1. Next, when the count value of the preliminary alarm counter Cyji is not 2, it is determined whether the adjacent section of Ji is determined to be a fire (S708), and when it is determined to be a fire, the section of Ji is immediately determined. It is determined that a fire has occurred (S71
6). If the adjacent section of Ji is not determined to be a fire, the control is moved to step S408 and the same processing as above is performed.

If it is determined in step S706 that the preliminary alarm counter Cyji has reached 2 after a predetermined time, it is determined whether the stored partition is an adjacent partition (S710). If it is an adjacent partition, both the partition and the adjacent partition are determined. Is determined to be a fire and stored (S711), and the determination result is output (S7).
12). If it is determined in step S710 that they are not adjacent to each other, it is determined whether the same partition is in the preliminary alarm state (S715), and if it is the same partition, it is determined that Ji's partition is a fire (S716). If it is determined in step S715 that the partitions are not the same, the partition Ji in the current preliminary alarm state is stored and the preliminary alarm counter Cyji is subtracted (S717).

Further, the judgment as to whether or not it is the adjacent section is made based on a correspondence table as shown in Table 1.

[0068]

[Table 1] Therefore, in the case of the method with a preliminary alarm, it is possible to determine a fire without providing a timer unit, and it is possible to determine a fire in the case of an adjacent section or the same section.

Next, the operation of the main MPU will be described. In this case, the second program without preliminary alarm is mainly to output the determination result of the fire determination unit to each unit, so the flowchart will be omitted and the second program with preliminary alarm will be described.

FIG. 8 is a flow chart for explaining the operation of the second program with preliminary alarm. First, the number of sections J
i = 1.2.3. ………… 10 and fire judgment part number Si =
1.2.3. ……. n and the like are set (S801). In this case, there are at least 30 sections, and the fire judgment section is 3
It is assumed that there are more than one.

Next, the number of set fire determination parts is determined (S802), and if there are three or more, the fire determination part Si = 1.
The determination results of the sections J1 to J9 are read and output to the printer unit, the remote control unit, etc. (S803). Next, the judgment results of the sections J2 to J9 of the next fire judgment unit Si = 2 are output (S8
04), it is determined whether or not the fire determination unit number Si = n has been reached (S805), and if Si = n has not been reached, control is transferred to step S804, and the sections J2 to J9 of the next designated fire determination unit are designated. The judgment result of is output.

The section J of the fire judging section Si = n-1
When it is determined that the determination results of 2 to J9 have been output, the determination results of the final sections J2 to J10 of the fire determination unit Si = n are output (S806). Next, the judgment results of the section J10 of the fire determination unit Si and the section J1 of the next fire determination unit Si + 1 are read and compared (S810).

Next, it is judged whether the compared judgment results are both in the preliminary alarm state (S811). If both are in the preliminary alarm state, the sections of both fire judging sections, that is, the adjacent fire judging sections are adjacent to each other. It is judged that the section is a fire (S8
12). Next, it is determined whether or not the fire determination unit Si = n has been reached (S813). If the fire determination unit Si = n has not been reached, the control moves to step S810 and the above-described operation is performed.

If both judgment results in step S811 are not preliminary alarm states, it is judged whether or not one indicates a fire occurrence (S820), and if only one indicates a fire occurrence, this time a preliminary alarm is issued. The adjacent section that has become a state is judged to be a fire. This judgment as to whether it is an adjacent section is shown in Table 1 above.
May be stored in advance and determined.

In the above description, the number of fire determination sections is three or more. However, in the case of one, for example, there is no section that extends over the fire determination section, so read the determination results of sections J1 to J10 with Si = 1. It is output (S830).

Further, when there are two fire judging sections, the judgment results of the sections J1 to J9 of the fire judging section Si = 1 are read and output (S841). And the section J2-J1 of Si = 2
The determination result of 0 is read and output (S842), control is transferred to step S810, and the same processing as the above is implemented. Since n = 2 in step S813 in this case, the determination in step S813 is determined to be Si = n.

Therefore, the fire judging section alone cannot judge a fire even if the sections between the fire judging sections adjacent to each other are in the preliminary warning state, but the main MPU executes the processing based on the second preliminary warning existence program. By carrying out, when a section of the adjacent fire determination unit is in the preliminary alarm state, a fire determination can be performed.

Further, by operating the changeover switch 18a, the disaster prevention board can be easily operated by either method.

Further, in the above embodiment, the case of the centralized type has been described, but it may be applied to the R type distributed type as shown in FIG. In this case, the function of the fire determination unit as described above is provided in the relays 40 to 40m, and the first MPU 31 without the preliminary alarm or the program with the first preliminary alarm described above is executed. Similarly to the above, the switching state of the method changeover switch 18a of the method changeover switch board 18 may be notified and the second program without a preliminary alarm or the second program with a preliminary alarm may be executed.

In the above embodiment, the fire judging section is the first
It has a program without a preliminary alarm and a program with a first preliminary alarm to judge the fire.
If the processing speed of the PU 31 is high and the memory capacity is sufficiently large, the main MPU 31 may perform the above-described fire determination function.

Further, in the above embodiment, the number of sections of the fire judging section is 10 and two detectors are provided for each section, but each section may be arbitrary.

[0082]

As described above, according to the present invention, there is provided the first fire judging means for implementing the method without a preliminary alarm and the second fire judging means for implementing the method with a preliminary alarm, and the switching means is switched. Since any one of the methods can be implemented based on the state, it is possible to easily deal with both the method without the preliminary alarm and the method with the preliminary alarm.

In the case of the system with a preliminary alarm, when a detection pulse satisfying a predetermined condition is input from the detector in the compartment, it is judged as a preliminary alarm state, and then the detector detects under the same condition. When a pulse is input, if the other section does not have a fire, it is judged whether it is a detection pulse from a detector in the same section or an adjacent section, and it is judged as a fire only when it is judged to be in the adjacent section or the same section. As a result, the accuracy of the fire judgment of the section is improved, and the reliability of the fire judgment is improved.

Further, since the arithmetic processing is performed based on the program of the system without the preliminary alarm or the program of the system with the preliminary alarm, an expensive timer unit is not required even in the system with the preliminary alarm and the configuration is simplified. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a tunnel disaster prevention board according to the present invention.

FIG. 2 is a schematic configuration diagram showing an embodiment of the present invention applied to a centralized type.

FIG. 3 is a flowchart illustrating a method selection operation.

FIG. 4 is a flow chart showing the operation of a first program without a preliminary alarm.

FIG. 5 is a flow chart showing the operation of the first program without a preliminary alarm.

FIG. 6 is a flow chart showing the operation of a first program without a preliminary alarm.

FIG. 7 is a flowchart illustrating a program with a first preliminary alarm.

FIG. 8 is a flowchart illustrating the operation of a second program with a preliminary alarm.

FIG. 9 is a schematic diagram of a distributed type.

FIG. 10 is a time chart of a detection pulse.

FIG. 11 is a schematic configuration diagram of a disaster prevention board to which a conventional method without a preliminary alarm is centrally applied.

FIG. 12 is a schematic configuration diagram of a disaster prevention board to which a conventional method with a preliminary alarm is centrally applied.

[Explanation of symbols]

 1 Tunnel 2 Disaster Prevention Board 12 Timer Unit 15 Method Selection Means 16 First Fire Judgment Means 17 Second Fire Judgment Means 18 Method Changeover Switch Board 18a Method Changeover Switches 26a-26m Fire Judgment Section 27 MPU 28 ROM 31 Main MPU

Claims (3)

[Claims] 1. A switching device which is provided with a switching device for switching between a system without a preliminary alarm and a system with a preliminary alarm, and switching means for sending a switching state of the switching device, and when the system without the preliminary alarm is selected, When a detection pulse satisfying a predetermined condition is input from each of the detectors arranged in each predetermined automatic notification section (hereinafter, simply referred to as a section), a first fire determination means for determining that section as a fire, When a method with an alarm is selected, when a detection pulse that satisfies a predetermined condition is input from the detector in the section, the section is set to the preliminary alarm state, and when a detection pulse is input under the same condition thereafter, It has a second fire judging means for judging whether the detection pulse is from the same section or an adjacent section as the section and judging that it is a fire when it is judged to be the same section or an adjacent section. Disaster prevention panel of the tunnel to be butterflies. 2. The second fire determining means determines, when a detection pulse satisfying a predetermined condition is input from a detector in a section adjacent to the predetermined section after determining that the predetermined section is a fire. The disaster prevention board for a tunnel according to claim 1, wherein a section adjacent to a predetermined section is determined to be a fire. 3. The disaster prevention board according to claim 1, wherein the first fire determining means performs arithmetic processing by a program without a preliminary warning and the second fire determining means performs processing by a program with a preliminary warning.