JP2959680B2 - Disaster prevention equipment and 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 disaster prevention equipment.

[0002]

2. Description of the Related Art Analog fire detectors used in disaster prevention equipment detect physical quantities of fire phenomena such as temperature, smoke, gas, and flame, and output signals proportional to the detected physical quantities. Generally, it is more expensive than a typical on-off fire detector. Further, in the case of detecting a fire in accordance with the change in the physical quantity, the receiver must always calculate and monitor the change in the physical quantity, and in order to reduce the load on the receiver, Each detector itself performs a fire detection operation, and emits a fire signal in the event of a fire, so-called ordinary on-off type fire detector, for example, differential type, constant temperature type, photoelectric type,
It is advisable to install a dimming type sensor.

Because analog fire detectors are expensive, analog fire detectors and ordinary on-off fire detectors must be mixed in the same line according to the need for analog information at the monitoring location. There is. In this case, for example, assuming that the power supply voltage between the pair of lines is 24 V, the analog fire detector generates a code signal by switching the voltage between 24 V and 20 V. At this time, the code signal corresponds to the physical quantity signal. And output it to the receiver. On the other hand, the normal on / off type fire detector has a voltage of 24 V when it does not operate. However, when it operates, the voltage at both ends drops to 5 V, for example. You can understand the operation of the fire detector.

If a normal on / off type fire detector and an analog type fire detector are simply mixed on the same line, when the normal on / off type fire detector operates,
The analog fire detector cannot function properly because the power supply voltage drops extremely. To prevent this, a repeater is interposed between the normal on-off type fire detector and the line, and the repeater converts the on-off signal output by the normal on-off type fire detector into a code signal.

[0005]

However, in the above-mentioned prior art, when the thermal analog fire detector sends a signal to the receiver as a 4-bit code signal, for example, the code signals are "0001" and "0010". "," 0011 ", ...
..., the detected temperatures are 40 ° C., 45 ° C., 5
0 ° C,..., While the code signals output by the relay connected to the normal on-off type fire detector are “0001”, “0010”, and “001” as described above.
If it is “1”, it may indicate “normal monitoring state”, “fire state”, and “line failure state”, respectively. As described above, even if the code signal is the same, the meaning of the code signal may be different depending on the type of the terminal device that outputs the code signal.

When the receiver receives a signal from the repeater, the receiver processes the signal from the repeater based on a program dedicated to the repeater. The program dedicated to the repeater is provided separately from the program for the analog fire detector. Therefore, if a normal on / off fire detector is mixed with the analog fire detector, there is a problem that the software load on the receiver is large. .

Further, in the above-mentioned conventional example, when a normal on / off type fire detector is mixed with an analog type fire detector, it is troublesome to provide a repeater, which causes a problem of an increase in cost. is there.

The present invention eliminates the need to provide a repeater for processing signals from a normal on / off type fire detector when an analog type fire detector and a normal on / off type fire detector are mixed. It is another object of the present invention to provide a disaster prevention facility capable of reducing the load on the software of the receiver.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a fire signal and a normal monitoring signal generated by a normal on / off type fire detector are provided.
The normal on / off type fire detector converts the physical quantity signal indicating the fire state and the normal monitoring state in the analog type fire detector, respectively, based on the signal from the analog type fire detector and the signal from the on / off type fire detector. Then, the receiving unit determines a fire.

[0010]

FIG. 1 is a block diagram showing an embodiment of the present invention, in which an ordinary on / off type fire detector OS is mixed with an analog fire detector AS and connected to a receiver RE. It is.

[0011] The analog fire detector AS is used for temperature, smoke,
A physical quantity of a fire phenomenon such as gas or flame is detected, and a signal proportional to the detected physical quantity is output. In the above embodiment, a code signal (pulse code modulation signal) is used as a signal proportional to the physical quantity. doing. However, a frequency modulation signal, an amplitude modulation signal, a phase modulation signal, or the like may be used instead of the code signal. The normal on / off type fire detector OS includes a constant temperature type heat detector using bimetal, etc., a differential type heat detector having a leak hole and a diaphragm on the wall of an air chamber, an ionization type, a photoelectric type, and a dimming. An example is a smoke detector of the type.

FIG. 2 is a block diagram showing an example of a normal on / off type fire detector OS in the above embodiment.

The on / off type fire detector OS includes an MPU (microprocessor unit) 10 for controlling the entire fire detector OS, a ROM 11 for storing a program relating to a flowchart shown in FIG. 5, and an on / off type fire detector OS. A ROM 12 for storing the generated signal and the code signal in association with each other; FIG. 4B shows the relationship between the signal generated by the on / off type fire detector OS and the code signal.

The on-off type fire detector OS is RA
M13 to M15; a thermistor T; a fire detection unit 16 having, for example, an AD converter for detecting a temperature based on the resistance value of the thermistor T; The RAM 13 is a memory for temporarily storing a temperature value detected by the fire detection unit 16, and the RAM 14 is a memory for storing a temperature value measured one time before, and a RAM 15.
Is a memory for storing a code signal corresponding to each signal generated by the fire detection unit 16. Further, the on / off type fire detector OS includes a transmission / reception unit 18 and an interface 19 thereof.
And The MPU 10 and the ROM 11 convert a fire signal generated by a normal on-off type fire detector into a physical quantity signal indicating a fire state in an analog type fire detector, and a normal signal generated by a normal on-off type fire detector. It is an example of a conversion unit that converts a monitoring signal into a physical quantity signal indicating a normal monitoring state in the analog fire detector.

Next, the operation of the on / off type fire detector OS in the above embodiment will be described.

FIGS. 3 and 4 show an on-off type fire detector OS.
FIG.

In the on / off type fire detector OS, a fire signal generated by the on / off type fire detector OS is converted into a physical quantity signal indicating a fire state in the analog type fire detector AS. The generated normal monitoring signal is converted into a physical quantity signal indicating a normal monitoring state in the analog fire detector AS, and the failure signal generated by the on / off fire detector OS indicates a failure state in the analog fire detector AS. It is converted into a physical quantity signal, and this converted signal (code signal) is
Sent to E.

That is, as shown in FIGS. 3 (1) and 4 (1), in the analog fire detector AS,
For example, if the detected temperature is 40 degrees C or less, level 1
0, associated with the code signal “001010”, the level increases by “1” each time the detected temperature increases by 1 ° C.
The code signal also increases by “1”, and the detected temperature of 69 ° C. is associated with the level 39 and the code signal “100111”. In the analog fire detector AS,
The detected temperature of 70 ° C is level 40, and the code signal “1010
00, the level increases by “1” each time the detected temperature increases by 1 ° C., and the code signal also increases by “1”. In the analog fire detector AS, a level of 09 or less indicates, for example, a failure of the detection element, and code signals “000000” to “001010” are allocated.

The on-off type fire detector OS basically generates a normal monitoring signal and a fire signal, and when the normal monitoring signal and the fire signal are generated, FIG. 3 (2) and FIG. ), The normal monitoring signal and the fire signal are converted to level 10 and level 40 signals (code signal “00”, respectively).
1010 "and" 101000 ").
The code signal “001010” corresponding to the normal monitoring signal in the on / off type fire detector OS is the same as the code signal indicating a normal monitoring state of, for example, 40 ° C. or less in the analog type fire detector AS. The code signal “1” corresponding to the fire signal in the sensor OS
“01000” is the same as the code signal indicating the fire state of, for example, 70 ° C. in the analog fire detector AS. When the on / off type fire detector OS generates, for example, a failure signal indicating a failure of the detection element, the failure signal is set to level 05 as shown in FIGS. 3 (2) and 4 (2).
(Code signal “000101”), which is output and converted to a code signal “000101” corresponding to a failure signal in the on / off type fire detector OS, by the analog fire detector A
This is the same as the code signal indicating the failure state in S.

By converting the signal generated by the on / off type fire detector OS as described above, the analog type fire detector AS and the ordinary on / off type fire detector O
When S is mixed, there is no need to provide a repeater for processing a signal from a normal on / off type fire detector OS,
Since the signal from the normal on / off type fire detector OS can be processed without providing the dedicated software for the normal on / off type fire detector OS in the receiver RE, the software load on the receiver RE can be reduced.

FIG. 5 is a flowchart showing a specific operation of the on / off type fire detector OS in the above embodiment.

First, each initial value such as a timer time of a timer (not shown) provided in the on / off type fire detector OS and a temperature difference 5 ° C. as a set value of the fire threshold value F is set (S
1) When the timer time elapses (S2), the fire detection unit 16 inputs the resistance value of the thermistor T (S3),
The MPU 10 determines the disconnection of the thermistor T, and if not disconnected (S4), the MPU 10 converts the resistance value into a temperature value and stores the converted temperature value in the RAM 13 (S5, S6). Then, the temperature value stored in the RAM 14 (the temperature value measured immediately before) is subtracted from the current temperature value stored in the RAM 13 and the difference is set to A (S7). When the difference A is less than the fire threshold value F (5 degrees C) (S8), the level 10 is set in the RAM 15 (S9) (actually, the code signal "001010" corresponding to the level 10 is stored in the RAM 15). set).
This level 10 is a level indicating a normal monitoring state.
Then, the contents stored in the RAM 13 are transferred to the RAM 14 (S10).

On the other hand, when the difference A is equal to or larger than the fire threshold value F (S8), the level 40 is set in the RAM 15 (S11) (actually, the code signal "101000" corresponding to the level 40 is stored in the RAM 15). set).
The level 40 is a level indicating a fire condition. If the thermistor T is disconnected (S4), the RAM
A level 5 indicating a failure at 15 is set in the RAM 15 (S20) (actually, a code signal "000101" corresponding to the level 5 is set in the RAM 15).

Thereafter, when a call is received from the receiver RE and the subsequent address matches the own address assigned to the on / off type fire detector OS (S30, S30).
31), the contents stored in the RAM 15 are stored in the receiver RE.
(S32).

The contents stored in the RAM 15 are code signals (“0
"00101", "001010", "101000")
When this code signal is received by the receiver RE, the receiver RE receives only the program for the analog fire detector, for example, even when the receiver RE uses the signal processing of the level determination described later. The state of the terminal device can be determined without determining what the terminal device of the other party is (even without recognizing the type of the terminal device with which communication is being performed).

FIG. 6 is a block diagram showing an example of the receiver RE in the above embodiment.

The receiver RE includes an MPU 20 for controlling the entire receiver RE, a ROM 21 for storing a program relating to the flowchart shown in FIG. 7, a RAM 22 for use as a work memory, and a RAM 23 for storing an address of a terminal device. , Display / sound unit 24, this interface 25, transmission / reception unit 26, and this interface 2
And 7. The MPU 20 and the ROM 21 are an example of a receiving unit that determines a fire based on a signal from an analog fire detector and a signal from an on / off fire detector. Further, the receiver RE has an operation unit (not shown).

Next, the operation of the receiver RE will be described.

FIG. 7 is a flowchart showing the operation of the receiver RE.

First, initial settings are made (S41), and the address N of terminal equipment such as the on / off type fire detector OS and the analog type fire detector AS is set to "1" (S42).
The level value output from the terminal device at the address N (state information output from the terminal device, which is actually a value output as a code signal) is collected, and the collected level value is stored in the RAM 22 (S43). When the MPU 20 determines that the level value is less than 10 (S44), the display / sound unit 24 performs a failure display (S45), and when the MPU 20 determines that the level value is 40 or more, the display / sound The unit 24 displays a fire (S47). If the level value is 10 or more and less than 40, it is in the normal monitoring state, and the address N of the terminal device is incremented by “1”.
Returning to S43, the above operation is repeated.

In this case, the flow chart shown in FIG. 7 is a flow chart for the analog fire detector AS. Using the program of this flow chart, the signal from the analog fire detector AS is processed and the on / off type fire detector AS is processed. It also processes signals from the fire detector OS. Therefore, a signal from the on / off type fire detector OS can be processed without requiring a dedicated program for the on / off type fire detector OS.

FIG. 8 is a view showing a modified example of the flowchart shown in FIG. 7, in which a type ID indicating the type of the terminal device is set for each terminal device, and the processing contents are varied according to the type ID. It is a flowchart in a case.

First, an initial setting is made (S51), the address N of the terminal device is set to "1" (S52), a type ID is collected from the terminal device of the address N, and the type ID is obtained.
Is stored in the RAM 23 (S53). As shown in FIG. 9, the terminal device type IDs "a", "b",
“C” indicates an analog fire detector, a repeater, and an on / off fire detector, respectively. Thereafter, the address N is incremented by "1" (S54), a type ID is collected from the terminal device of the address N, and the type ID is stored in the RAM 23.
Is executed up to the final address M (S5).
5). Then, the address N is set to “1” again (S
60), output level values are collected from the terminal device at the address N, and the output level values are stored in the RAM 22 (S6).
1) If the type ID indicates an on / off type fire sensor (S62), the level value is determined, and if the level value is 40 (S63), a fire display is performed (S6).
4) If the level value is 10 (S65), a failure display is performed (S66).

On the other hand, if the type ID indicates an analog type fire detector (S71), necessary analog processing is performed and a fire determination is performed (S72), indicating that the type ID is a repeater. If there is (S73), processing as a repeater is performed (S74). Then, the address N is incremented by "1" (S81). S61 to S8
The operation 1 is repeated up to the final address M (S82).

In the operation shown in FIG. 8, when the type ID is the on / off type fire sensor OS, the levels 40, 1 are compared with the program dedicated to the analog fire sensor AS.
Only the determination and processing regarding 0 are increased, and the load on the software of the receiver RE is not so large.

In the above-described embodiment, the receiver RE is provided with the receiver for discriminating a fire based on the signal from the analog fire detector AS and the signal from the on / off fire detector OS. The receiving unit may be provided in the repeater.

In the above embodiment, the detected temperature is 69 ° C.
If it is below, it is determined that it is in the normal monitoring state, and the detected temperature 7
If it is 0 degrees C or more, it is judged that it is a fire condition,
The detected temperature for judging the fire condition may be set to a temperature value other than 70 ° C.

It is to be noted that a plurality of on / off fire detectors OS are provided.
If provided, the detection sensitivities may be different, and different ID codes may be provided for each of the on / off fire detectors. For example, three on-off fire detectors are provided, these are smoke detectors, the first on-off smoke detector operates at 5% smoke density, and the second on-off smoke detector is smoke density. The third on / off smoke detector may be set to operate at 15% smoke density, and the condition that the receiver RE emits a fire may be changed according to time. . Specifically, at midnight, the first on / off smoke detector (operates at a smoke density of 5%)
A fire alarm is issued when the camera operates, and at nights other than midnight, a fire alarm is issued when the second on / off smoke detector (operating at a smoke density of 10%) operates.
The receiver RE may determine so that a fire alarm is issued when the second on / off smoke detector (operating at a smoke density of 15%) operates.

In the above embodiment, the on / off type fire detector outputs a signal of a predetermined level (for example, level 40) at the time of a fire to a receiving unit such as a receiver when it is determined that a fire has occurred. When performing analog signal processing based on a physical quantity signal of a fire phenomenon in a receiving unit such as a machine or a repeater, in order to make a fire determination based on a time course pattern or the like of a physical quantity signal received from an analog fire detector, The on / off type fire detector may output a signal in a state matching the fire discrimination pattern. For example, if the analog signal processing in the receiving unit is of the integral type, the on / off type fire detector may output a signal of a predetermined level continuously for a certain period of time (that is, over the number of polling times required for fire discrimination). In the case of the differential system, signals of different levels may be output at intervals.

[0040]

According to the present invention, when an analog fire detector and a normal on / off fire detector are mixed,
There is no need to provide a repeater for processing a signal from a normal on / off type fire detector, and it is possible to reduce the load on the software of the receiver.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, showing an example in which a normal on / off type fire detector OS and an analog type fire detector AS are mixed and connected to a receiver RE.

FIG. 2 is an on-off type fire detector OS in the embodiment.
FIG. 4 is a block diagram showing an example of the above.

FIG. 3 is an on-off type fire detector OS in the above embodiment.
FIG.

FIG. 4 is an on-off type fire detector OS in the above embodiment.
FIG.

FIG. 5 is an on-off type fire detector OS in the embodiment.
6 is a flowchart showing the operation of the embodiment.

FIG. 6 is a block diagram illustrating an example of a receiver RE in the embodiment.

FIG. 7 is a flowchart showing an operation of the receiver RE in the embodiment.

FIG. 8 is a flowchart showing an operation of the receiver RE in the embodiment, and is a flowchart showing an operation different from that of FIG. 7;

FIG. 9 is a diagram showing an example of a relationship between an address of a terminal device and its type ID in the embodiment.

[Explanation of symbols]

 OS: On / off type fire detector, AS: Analog type fire detector, RE: Receiver, T: Thermistor, 10, 20: MPU, 13 to 15, 22, 23: RAM, 11, 12, 21, ROM, 16 ... Fire detector.

Claims (5)

(57) [Claims] An analog fire detector and a fire signal generated by a normal on / off fire detector are converted into a physical quantity signal indicating a fire condition in the analog fire detector, and the normal on / off fire detection is performed. A normal on / off type fire detector for converting a normal monitoring signal generated by the detector into a physical quantity signal indicating a normal monitoring state in the analog type fire detector; a signal from the analog type fire detector and the on / off type fire detection And a receiving unit for determining a fire based on a signal from a vessel. 2. The fire detector according to claim 1, wherein the normal on / off type fire detector converts a failure signal generated by the normal on / off type fire detector into a physical quantity signal indicating a failure state in the analog type fire detector. Disaster prevention equipment characterized by being a detector that does. 3. The disaster prevention equipment according to claim 1, wherein the receiving unit is a receiver or a repeater. 4. A fire generated by a normal on-off type fire detector.
Disaster signal indicates fire status of analog fire detector
Converts to a physical quantity signal and performs the normal on-off fire detection described above.
The normal monitoring signal generated by the fire alarm is detected by the analog fire detection described above.
To convert to a physical quantity signal indicating the normal monitoring status of the
A fire detector provided with a replacement means. 5. The method according to claim 4, Fault signal generated by the above-mentioned normal on-off type fire detector
Indicates a failure state in the analog fire detector.
A fire detector characterized by converting it into a physical quantity signal.