JPH0785381A - Fire sensor with repeater function - Google Patents

Abstract

PURPOSE:To provide a fire sensor with a repeater function without the necessity for arranging a repeater when the signals of plural general type fire sensors are transmitted to receiver for fire and for providing large space on the back surface of the base of the general type fire sensor when the general type fire sensor is isolatedly provided. CONSTITUTION:A detecting part 11 detecting the element of a fire phenomemon, a discriminating circuit 12 discriminating whether fire or not in accordance with the output signal of the detecting part 11, a transmitting circuit 13 transmitting a discriminated result to a fire receiver with a first signal line SL1 and a receiving circuit 14 receiving a signal indicating the operation of another fire sensor 21 with the second signal line SL2 are provided so that the transmitting circuit 13 transmits a fire signal in accordance with ther discriminated result and also the transmitting circuit 13 transmits the fire signal in accordance with the output signal of the receiving circuit 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detecting section for detecting an element of a fire phenomenon, a judging circuit for judging whether or not there is a fire according to the detecting section, and outputting the judgment result, and a signal line. And a transmission circuit that sends the determination result to the fire receiver.

[0002]

2. Description of the Related Art Conventionally, a general-purpose fire detector in a fire alarm system has a fire detection section for detecting a fire phenomenon and a fire signal short-circuited according to the output of the fire detection section. And a switching circuit that outputs as a signal. As described above, since the general-type fire detector does not have a transmission circuit that sends a coded signal to the fire receiver, in order to add an address to the signal of the general-type fire detector and transmit it to the fire receiver, A general type fire detector is connected to a repeater having an address signal transmitting function, and signals are transmitted to the fire receiver through this repeater. If you do this,
An address signal can be added to the signals of a plurality of general-purpose fire detectors and transmitted to the fire receiver via a repeater.

When a general type fire detector is provided separately, an adapter having a repeater function, that is, an adapter having a transmission / reception circuit is used without connecting the general type fire detector to the repeater. It is installed in a general-purpose fire detector and transmits signals to the fire receiver via this adapter. Specifically, a predetermined space is secured on the back surface of the base of the general type fire detector, and the adapter is installed in this space.

[0004]

However, in the above-mentioned conventional example, in order to add an address to the signals of a plurality of general type fire detectors and transmit them to the fire receiver, a unit type repeater is installed. Necessary, the cost of this repeater is high, and the work of installing the repeater is complicated, while
In order to install the general type fire detector separately, it is necessary to secure a space for the adapter on the back of the base of the general type fire detector, and this space is relatively large, which is a disadvantage in construction. There is.

According to the present invention, when transmitting signals of a plurality of general type fire detectors to a fire receiver, it is not necessary to install a repeater, and when the general type fire detectors are provided separately,
It is an object of the present invention to provide a fire detector with a repeater function that does not require a large space on the back surface of the base of a general type fire detector.

[0006]

SUMMARY OF THE INVENTION The present invention is a detection circuit for detecting an element of a fire phenomenon, and a discrimination circuit for discriminating whether or not a fire is present according to an output signal of the detection section and outputting a result of this discrimination. And a transmission circuit that sends out the determination result to the fire receiver via the first signal line, and a reception circuit that receives a signal indicating the operation of another fire detector via the second signal line. And the transmission circuit sends out a fire signal according to the discrimination result, and the transmission circuit sends out a fire signal according to the output signal of the receiving circuit.

[0007]

According to the present invention, a receiving circuit for receiving the operation of another fire detector via the second signal line is provided in addition to the detecting section, the discriminating circuit and the transmitting circuit, and based on the discriminating result of the discriminating circuit. Since the transmission circuit sends out a fire signal and the transmission circuit sends out a fire signal based on the output signal of the receiving circuit, when transmitting the signals of multiple general type fire detectors to the fire receiver, unit type relay There is no need to install a vessel,
When the general type fire detector is provided separately, it is not necessary to provide a large space on the back surface of the base of the general type fire detector because the space required for the receiving circuit is small.

[0008]

1 is a block diagram showing a first embodiment of the present invention.

In this embodiment, the fire detector with repeater function 10 is composed of a main body 10s and a base 10b,
The main body 10s includes the first detection unit 11 and the first determination circuit 1
2, a first transmission circuit 13, and a reception circuit 14.

The first detection unit 11 detects a physical quantity of a fire phenomenon such as smoke, heat, flame, gas or odor, and the first discrimination circuit 12 has a plurality of different fire discrimination levels. Then, it is a circuit that determines which level the fire corresponds to in accordance with the output signal of the first detection unit 11 and outputs the result of this determination.

The first transmission circuit 13 is a circuit for sending the discrimination result of the discrimination circuit 12 to a fire receiver (not shown) by adding a self address or the like via the first signal line SL1. The reception circuit 14 is a circuit that receives a signal indicating the operation of the general-purpose fire detector 21 via the second signal line SL2. In other words, the receiving circuit 14 is a circuit that receives a signal indicating the operation of another fire detector via the second signal line SL2. The first transmission circuit 13 sends a fire signal according to the result of the judgment by the judgment circuit 12, and also sends a fire signal according to the output signal of the reception circuit 14. The first transmission circuit 13 is provided with an unillustrated DIP switch or EEPROM for setting a self-address and a general type fire detector.

The general type fire detector 21 is composed of a main body 21s and a base 21b, and the main body 21s has a second detector DE for detecting the physical quantity of the fire phenomenon and the second detector D.
A switching circuit SW that determines whether or not there is a fire according to the output signal of E and outputs the result of the above determination (that is, a fire signal) by substantially short-circuiting the second signal line SL2.
A fire detector having and. The second signal line SL
The resistor R provided in the middle of 2 is a current limiting resistor that limits the current flowing through the second signal line SL2 when the general-purpose fire detector 21 operates, and is a switching circuit S.
W is an example of a second determination circuit that determines whether or not there is a fire according to the output signal of the second detection unit DE and outputs the result of this determination.

Next, the operation of the first embodiment will be described.

In the fire detector with repeater function 10, when the first detector 11 detects a fire phenomenon, the first discriminating circuit 12 discriminates the level of the fire based on the physical quantity thereof. Then, the first transmission circuit 13 sends out a fire signal and the address of the fire detector 10 with the relay function by a coded signal to a fire receiver (not shown). Also,
When the second detector DE in the general-purpose fire detector 21 detects a fire phenomenon, the switching circuit SW operates to generate a fire signal, and the fire signal is the second signal.
Is sent to the receiving circuit 14 via the signal line SL2. The receiving circuit 14 sends a signal indicating that the general-purpose fire detector 21 has sent a fire signal to the first transmission circuit 13, and the fire signal and the address of the general-type fire detector 21 are not shown in the fire receiver. To the first transmission circuit 13. That is, it indicates not only that the fire signal is sent to the fire receiver, but also that the general-type fire detector 21 connected to the fire detector with relay function 10 has detected a fire phenomenon as one of the status information. Send a signal.

According to the above embodiment, the general type fire detector 2
1 is provided separately, the receiving circuit 14 is used as the fire detector 2
It is not necessary to install it on the base 1 of the fire detector 21.
There is no need to provide a large space on the back surface of 1b. Further, since the main body 10a of the fire detector 10 can be removed from the installation surface by using the detachment device of the fire detector, the fire detector 10 can be easily removed, and therefore the fire detector 10 and the fire detector 21 It is easy to change the address settings.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

This second embodiment is basically the same as the embodiment shown in FIG. 1, but the fire detector 10 with a repeater function includes a general type fire detector 21 and a general type fire. Sensor 2
2, 23, 24 are connected, and general type fire detectors 21 to 2
4 and the receiving circuit 14 are connected by a second signal line SL3, and resistors R1 and R are provided in the middle of the second signal line SL3.
The difference is that 2, R3, and R4 are connected. Resistance R
The values of 1, R2, R3, and R4 are different from each other. Further, each configuration of the general type fire detectors 22, 23, 24 is the same as the configuration of the general type fire detector 21. In addition, in FIG. 2, the fire detector with a repeater function 10 and the general type fire detectors 21 to 24 are shown.
In the main body 10s, 21s and the base 10b, 21b
The display showing the separation between and is omitted.

Next, the operation of the second embodiment will be described.

When the second detector DE in any of the general type fire detectors 22 to 24 detects a fire phenomenon,
A fire signal is generated by the operation of the switching circuit SW connected to the second detection unit DE, and the fire signal is transmitted via the second signal line SL3 to the reception circuit 14
Sent to.

Even if the general-purpose fire detectors 21-24 are the same as each other, the values of the resistors R1-R4 are different from each other. Therefore, when any one of the general-purpose fire detectors 21-24 operates, the receiving circuit is activated. The voltage of the input terminals of 14 is different, so that the receiving circuit 14 can recognize which of the general-purpose fire detectors 21 to 24 has operated. Then, the receiving circuit 14 includes the general type fire detectors 21 to 21.
The general type fire detectors 21 to 21 which sent the signal indicating which of 24 sent the fire signal to the first transmission circuit 13 and operated.
The first transmission circuit 13 sends the address of 24 and the fire signal to a fire receiver (not shown). That is, in addition to simply sending a fire signal to the fire receiver, any of the general type fire detectors 21 to 24 connected to the fire detector with a relay function 10 detects a fire phenomenon as one of the status information. A signal indicating whether or not it has been sent. In addition, in FIG. 2, the common line C
The resistor R provided in L may be omitted, and in this case, the resistors R1 to R4 also function as current limiting resistors.

In the above embodiment, when the signals of a plurality of general type fire detectors are transmitted to the fire receiver, it is not necessary to install relays for each, and the fire detectors are attached and detached. Since the fire detector with repeater function 10 can be removed from the surface, it is easy to remove the fire detector with repeater function 10. Therefore, the address setting of the fire detector with repeater function 10 and the general type fire detector are possible. It is easy to change the address settings 21 to 24.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

This third embodiment is basically the same as the second embodiment, but a second signal line SL4 is provided instead of the second signal line SL3, and instead of the resistors R1 to R4. The difference is that resistors R11 to R41 are provided.

That is, a series circuit of a general type fire detector 21 and a resistor R11 is connected to the receiving circuit 14, and a general type fire detector 22 and a resistor R21 are connected in series in parallel with the general type fire detector 21. A circuit is connected, a series circuit of a general type fire detector 23 and a resistor R31 is connected in parallel with the general type fire detector 22, and a general type fire detector 24 is connected in parallel with the general type fire detector 23. And a resistor R41 connected in series. Therefore, the general type fire detector 21
Is activated, the load resistance of the receiving circuit 14 becomes the resistance R11, and if the general-purpose fire detector 22 operates, the receiving circuit 1
The load resistance of No. 4 is a series circuit of resistors R11 and R21, and if the general type fire detector 23 operates, the receiving circuit 14
The load resistance of is a series circuit of resistors R11, R21 and R31, and if the general type fire detector 24 operates, the load resistance of the receiving circuit 14 is resistors R11, R21, R31 and R41.
It becomes a series circuit with.

As described above, the general type fire detectors 21 to 24
The load resistance of the receiving circuit 14 changes according to the general type fire detector that operates in the above, so that the current flowing through the second signal line SL4 changes, and the receiving circuit 14 detects this current change, It is possible to identify the operated general type fire detector.

Then, the receiving circuit 14 sends a signal indicating which of the general type fire detectors 21 to 24 has sent the fire signal to the first transmission circuit 13, and the first transmission circuit 13 outputs the fire signal. The address of the operated general-purpose fire detectors 21-24 is transmitted, and a signal indicating which of the general-purpose fire detectors 21-24 detected the fire phenomenon is transmitted.

In the third embodiment, the second signal line S
Since L4 is composed of two pieces, the construction is easy, and a large number of general-purpose fire detectors can be connected within a range in which a voltage change due to resistance can be detected.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

In the fourth embodiment, high-performance fire detectors 21a-24a are provided in place of the general type fire detectors 21-24 in the third embodiment, and high-performance fire detectors 21a-2 are provided.
Each of 4a is connected in parallel with the receiving circuit 14.

The high-performance fire detector 21a has a second detection unit DE for detecting a physical quantity of a fire phenomenon and, for example, a plurality of different fire discrimination levels, and any one of them depending on an output signal of the second detection unit. A second discriminating circuit SH for discriminating whether or not the fire corresponds to the level and outputting the result of this discrimination;
A second transmission circuit TR is provided, which adds a self-address to the discrimination result in the second discrimination circuit SH and sends the self-address to the fire receiver with repeater function 10 through the second signal line SL5. . In addition, high-performance fire detectors 22a, 23
a and 24a have the same structure as the high-performance fire detector 21a, and the high-performance fire detectors 21a, 22a, 23a, and 24a.
The second transmission circuit TR in each of a has an address setting means such as a DIP switch or an EEPROM (not shown), which gives different addresses to each other, and communicates with the receiving circuit 14 using this address.

In the fourth embodiment, each of the high-performance fire detectors 21a to 24a detects the physical quantity of the fire phenomenon and sends out the status information (fire information, normality of detector, abnormality information, etc.). Then, the same operation as that of the fire detector with relay function 10 is performed, but the state information sent by the high-performance fire detectors 21a to 24a is received by the receiving circuit 14 of the fire detector with relay function 10, and this reception is performed. It is sent to the fire receiver via circuit 14.

The fourth embodiment is useful when it is necessary to increase the number of fire detectors to be installed due to a division of the fire monitoring area or the like. In other words, the same fire detector as the existing one can be installed as an additional fire detector after the change of the fire monitoring area. It is possible to realize equipment.

FIG. 5 is a block diagram showing a fifth embodiment of the present invention.

This fifth embodiment is basically the same as the fourth embodiment, but compared with the fourth embodiment, instead of the fire detector 10 with a repeater function, it has a repeater function. The difference is that the fire detector 10a is provided. The fire detector with a relay function 10a is provided with a third transmission circuit 15 in addition to the first detection unit 11, the first determination circuit 12, the first transmission circuit 13, and the reception circuit 14. Third transmission circuit 1
Reference numeral 5 is a circuit that sends out a fire signal according to the output signal of the receiving circuit 14 via the first signal line SL1. In addition,
The receiving circuit 14 receives from the second transmission circuit TR of the high-performance fire detectors 21a to 24a via the second signal line SL5,
It is a circuit that receives a signal indicating the operation of the high-performance fire detectors 21a to 24a.

In the fifth embodiment, the status information sent by the high-performance fire detectors 21a to 24a is received by the receiving circuit 14 of the fire detector 10a with a relay function, and the receiving circuit 14 and the second transmission. It is sent to the fire receiver via the circuit 15.

According to the fifth embodiment, the electric circuit of the fire detector with repeater function 10a has a detector portion (first detecting portion 1).
1, the first determination circuit 12, the first transmission circuit 13) and the repeater portion (reception circuit 14, second transmission circuit 15) are separated, the second transmission circuit 15 is the first transmission. The operation load of the circuit 13 is reduced.

In the second to fifth embodiments, four fire detectors are connected to the fire detectors 10 and 10a with a repeater function, but two fire detectors are connected instead of four fire detectors.
Three or more fire detectors may be connected. In addition, the fire detectors 10 and 10a with the repeater function,
The high-performance fire detectors 21a to 24a may have, for example, the discrimination circuits 12 and SH having only one fire discrimination level, or may have other functions added thereto.

[0038]

According to the present invention, when transmitting the signals of a plurality of general type fire detectors to the fire receiver, it is not necessary to install a repeater, and the general type fire detectors are provided separately. In this case, there is no need to provide a large space on the back surface of the base of the general type fire detector.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

FIG. 5 is a block diagram showing a fifth embodiment of the present invention.

[Explanation of symbols]

 10, 10a ... Fire detector with repeater function, 11 ... First detection unit, 12 ... First determination circuit, 13 ... First transmission circuit, 14 ... Reception circuit, 15 ... Third transmission circuit, 21 -24 ... General type fire detector, 21a-24a ... High-performance fire detector, DE ... 2nd detection part, SW ... Switching circuit as a 2nd discriminating circuit, SH ... 2nd discriminating circuit, TR ... 2nd 2 transmission circuit, SL1 ... 1st signal line, SL2-SL5 ... 2nd signal line.

Claims (3)

[Claims] 1. A first detection unit for detecting an element of a fire phenomenon; a first judgment unit for judging whether or not there is a fire according to an output signal of the first detection unit and outputting a result of this judgment. Circuit;
A first transmission circuit that sends the determination result to a fire receiver via a first signal line; and a reception circuit that receives a signal indicating the operation of another fire detector via a second signal line. And; and the first transmission circuit sends a fire signal according to the determination result, and sends a fire signal according to the output signal of the receiving circuit. Fire detector with function. 2. The fire detector according to claim 1, wherein the other fire detector is a general-type fire detector or a high-performance fire detector, and the general-type fire detector includes a second fire detector that detects an element of a fire phenomenon. A fire detector having a detector and a second discriminating circuit which discriminates whether or not there is a fire according to the output signal of the second detector and outputs the result of this discrimination to the second signal line. The high-performance fire detector includes the second detector, the second discriminating circuit, the discrimination result in the second discriminating circuit, and the self-address via the second signal line. A fire detector with a repeater function, comprising a second transmission circuit for sending to a fire receiver with a repeater function. 3. A first detection section for detecting an element of a fire phenomenon; a first judgment section for judging whether or not there is a fire according to an output signal of the first detection section and outputting the result of this judgment. Circuit;
A first transmission circuit for sending the determination result to the fire receiver via the first signal line; and a second transmission circuit for another fire detector via the second signal line to the above A receiving circuit for receiving a signal indicating the operation of the fire detector; and a third transmitting circuit for transmitting a fire signal according to the output signal of the receiving circuit via the first signal line. Fire detector with repeater function.