JPH1166450A - Fire alarm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set the final addresses to a prescribed number of fire sensors at a site. SOLUTION: Every fire sensor 4 has an address setting part 42 where the continuous individual addresses are set, and every outdoor inspector 12 identifies the sensors 4 according to their addresses. Furthermore, every sensor 4 has a final setting part 43 where the final address that is recognized by a receiving part is set. Accordingly, the final sensor 4 can be easily discriminated when the sensors 4 give the individual responses to the inspectors 12. When an automatic inspection function is actuated, the number of inspection objects can be compared with the number of responses. Then the number of sensors 4 can be easily decided from the final.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm which can easily determine the state of a fire detector connected to a receiver.

[0002]

2. Description of the Related Art Conventionally, when a plurality of fire detectors are connected to a common signal line to a fire receiver as a receiving unit, and when the condition monitoring and inspection control of each fire detector is performed by signal transmission, each fire detector is used. Is set with an individual address, and by transmitting a signal with the address, it is possible to specify the fire detector that has transmitted the signal, and to output a control command to the specific fire detector.

Although the number of fire detectors that can be connected differs depending on the fire receiver, the address range is consecutive from the first in order to increase the transmission time and simplify the monitoring and control of the system. , And the final address is set in the fire receiver according to the number. Thus, when the fire receiver individually collects data from each fire sensor, the fire receiver outputs a data return command in the range from the first address to the last address sequentially, so that each fire sensor can individually respond. Data can be collected.

[0004]

Even if the object is a large object such as a building, if a large number of fire detectors are monitored and controlled by one fire receiver, the final address is given to the fire receiver. You only need to set one. However, in systems for houses such as condominiums, a fire receiver is provided for each dwelling unit, and the number of fire detectors differs for each fire receiver. When installing these fire receivers,
It is very troublesome to set the number of installation data for each receiver. For this reason, it is preferable that the number of fire detectors to be installed can be easily set on site and that the number of fire detectors is automatically provided.

It is an object of the present invention to easily set the final address for a predetermined number of fire detectors on site.

[0006]

SUMMARY OF THE INVENTION In view of the above, according to the present invention, each fire detector has an address setting unit in which a continuous and separate address is set, and the receiving unit includes:
Each fire sensor is individually recognized by the address, and further, each fire sensor has a final setting unit that is set to be the last address recognized by the receiving unit. Is what you do.

Therefore, when each fire detector is individually made to respond to the receiving unit, the final fire detector can be easily determined, and when the automatic inspection function is performed, the number of inspection objects and the number of responses are compared. Also, when the receiving unit such as a fire receiver is replaced, the number of installations can be easily determined from the final address.

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram schematically showing an embodiment of a system for setting an apartment house.

As an individual room of an apartment house, for example, 101
For example, a pair of signal lines 2 that also serve as power lines and are drawn out from a fire receiver 1 provided in a living room in a dwelling unit such as a room No. (R101) or a room No. 401 (R401). Fire detectors 4 are connected in parallel by sending wires. Between the fire detector 1 of the signal line 2 and each fire detector 4, the signal line 2 is always connected to the fire receiver 1, and when the outdoor inspection device 12 is used, the signal line 2 is connected to the outdoor inspection device 12. A line switching repeater 6 for switching connection is disposed on the side.

Each of these fire detectors 4 always performs a fire monitoring operation by a power supply supplied from the fire receiver 1 through the signal line 2, and performs a switching operation when a fire is detected to lower the distance between the signal lines 2. The impedance is almost short-circuited. At that time, the fire receiver 1 detects a substantially short-circuit state based on the switching operation and performs a fire notification operation in the dwelling unit. At this time, the fire receiver 1 outputs a necessary fire signal via the signal line 3 to the dwelling receiver 5 provided for monitoring and controlling not only the inside of the dwelling unit but also the entire building of the apartment house. Further, for example, a fire display may be performed on an outdoor indicator provided and connected to the entrance of a dwelling unit integrally with the outdoor inspection device 12. At the time of inspection, there is a switching input from the outdoor inspection device 12 to the line switching repeater 6. This checker 1
Based on the inspection operation from 2, the repeater 6 outputs an inspection start output to the fire receiver 1 (not shown in detail) via an inspection output line, and displays that the fire receiver 1 is under inspection, and each fire detector 4 2 is disconnected from the fire receiver 1 and connected to the outdoor inspection device 12. In this state, the fire receiver 1 performs an inspection display based on the inspection start output of the repeater 6, and enables the outdoor inspection from the outdoor inspector 12. At this time, each fire detector 4 operates with the power supply voltage supplied from the inspection device 12 through the signal line 2. The outdoor inspection device 12 may be detachable, in which case only the connector needs to be provided at the position of the outdoor inspection device 12 in FIG.

FIG. 2 is a schematic circuit diagram of the fire detector 4 used in the system of FIG.

The fire detector 4 includes a constant voltage circuit B2 for supplying a stable voltage and current using terminals C and L to which the power / signal line 2 is connected as a power source, and a charging time constant for a resistor and a capacitor. Oscillator circuit (not shown) for interrupt input to microcomputer based on control circuit B3
And a sensor circuit B4 for detecting heat due to a fire based on the temperature characteristics of the thermistor. When the control circuit B3 determines that a fire has occurred, the terminals C and L are switched to a low-impedance substantially short-circuited state, and a check is performed. A fire output circuit B1 for lighting a lamp, and a terminal L to which an input side of the signal line 2 is connected for performing an inspection operation.
A signal transmission circuit B6 for detecting the input of a pulse as a check signal from the control circuit B5 and a test circuit B5 for causing the sensor circuit B4 to perform a check operation based on the control of the control circuit B3 during the check operation.
And

For example, the inspection operation by the control circuit B3 in the case of using a thermistor generates a pseudo high temperature state. For example, by connecting a resistor in parallel to the thermistor in the sensor circuit B4, Can be detected. Then, based on the result, the control circuit B3 determines that the inspection result is normal, and the fire output circuit B1
Turn on. Fire detector 4 used in the system of FIG.
In addition to the thermistor-type heat sensor, other types of sensors such as a photoelectric smoke detector and a flame detector can be used, but at that time, it is necessary to provide a necessary circuit for performing an inspection operation. is there.

The control circuit B3 is provided with a storage section 41 of an EEPROM as a nonvolatile and rewritable memory. In the control section B3, a separate address continuous to each fire detector 4 is set to individually specify the fire detectors. And a final setting unit 4 for setting the last address in each of the fire detectors 4 in one signal line 2.
3 are set.

Next, a signal transmission system for the signal line 2 will be described. The outdoor checker 12 first sends a preparation signal to make each fire detector 4 recognize that transmission is started,
A header signal indicating the head, a control code signal indicating the content of the required inspection, an address signal individually specifying each fire detector 4, and a footer signal indicating the end as one control unit. The data is transmitted while changing the address of the connectable number in order to operate individually. Finally, an END signal for causing each fire detector 4 to recognize the end of the transmission is transmitted. During this signal transmission, when the address signal of the control unit matches its own address, each fire detector 4 performs the check operation indicated by the control signal of the control unit at the timing of the footer signal.
The designated fire detector 4 responds by transmitting its own address signal and a response signal based on a normal signal or an abnormal signal at a timing provided before the next header signal (finally, an END signal).

Next, regarding the specific form of the transmission signal,
First, the preparation signal continues a steady potential of, for example, one second or more, then forms a plus-side pulse with a width of, for example, 30 ms, and continues the steady potential for, for example, 500 ms. In response to this preparation signal, each fire detector 4 interrupts the operation currently being processed and makes preparations for transmission. At this time, the pulse width needs to be a width that can be reliably detected during the operation of the fire detector 4. Then, the header signal and the footer signal continue a pulse having a width of, for example, 12 ms and a steady potential of, for example, 200 ms. The rising of the first pulse is the same for other signals, but indicates the end of the steady potential of the immediately preceding signal. The pulse of the header signal and the like corresponds to a code signal portion indicating a control code and an address described below. The pulse and the shape are different. This facilitates the distinction between the control code and the signal portion whose address is desired to be indicated.

For a code signal portion indicating a control code or an address, a pulse having a width different from a pulse of a header signal or the like, for example, a pulse of 3 ms, is formed, and the time of a subsequent steady potential is indicated by a width of "0", for example. 12ms or "1"
, For example, 24 msec. This "0", "1"
A control code and an address are represented by a combination of, for example, in the control code, two bits represent various modes at the time of inspection, and the address represents four bits from address 1 to address 10. Therefore, the code signal portion in this case is equivalent to 6 bits. With respect to the code signal portion, the control code portion is designated as "01" and the address portion is designated as "0001" so that the fire detector at address 1 operates in the inspection mode. "1010" specifies that the fire detector at address 10 is operated in the inspection mode.

And the addressed fire detector 4
Performs a process specified by the control code, operates the signal transmission circuit B6, and transmits a response signal including its own address signal to the outdoor inspection device 12 to respond. At this time, the fire detector 4 is set in the address setting section 42 of the storage section 41.
Then, the contents of the final setting section 43 are read and used as a response signal code. The outdoor inspection device 12 recognizes that the fire detector 4 at the corresponding address has some kind of abnormality by receiving no signal or receiving an abnormal signal at the timing at which the fire detector 4 responds.

In the fire detector 4 to which the final address is set among the fire detectors 4 to which the address is specified, whether the final is set in the final setting section 43 is set on / off or the like. The fire detector 4 at the last address is
The response signal is transmitted by adding a final signal instead of the self address to the response signal. Outdoor inspection device 1 that received this signal
No. 2 recognizes that there is no fire detector of the next address, changes the address and ends signal transmission, and outputs an END signal. The END signal continues a pulse having a width of, for example, 12 ms and a steady potential of, for example, 1 second. Each of the fire detectors 4 detects the steady state for one second or more, ends the transmission, and starts the normal fire detection operation.

Here, as a specific signal transmission flow,
Description will be made by taking Room 101 (R101) in FIG. 1 as an example.
Three fire detectors 4 are connected thereto, and addresses 1 to 3 are set in the address setting section 42, addresses 1 and 2 are set to off in the final setting section 43, and on is set to address 3 in the final setting section 43. , The case where the process ends normally.

First, the outdoor inspector 12 outputs a preparation signal, and outputs a header signal, an inspection mode, a code signal of address 1, and a footer signal. Next, address 1 (AD
The fire detector 4 of 1) responds with the address 1 and the code signal of the normal signal. Then, the outdoor inspection device 12 outputs the header signal, the inspection mode, the code signal of the address 2, and the footer signal. Next, the fire detector 4 at the address 2 (AD2) responds with the address 2 and the code signal of the normal signal. Then, the outdoor inspection device 12 outputs the header signal, the inspection mode, the code signal of the address 3, and the footer signal. Next, the fire detector 4 at address 3 (AD3) responds with the final signal and the code signal of the normal signal. Finally, the outdoor inspector 12 outputs the END signal and ends the signal transmission. As described above, since the outdoor inspector 12 can recognize the final address of each room by the response from the fire detector 4, when one outdoor inspector 12 is shared by each room, the number of installations per room and the like are reduced. You do not need to check it.

Although not shown in detail, the address setting unit for storing addresses in the above-described embodiment is a storage means such as an EEPROM provided in the control circuit B3, and is controlled via terminals C and L. It is sufficient that data can be set by, for example, outputting a setting command to the circuit B3, and a nonvolatile and rewritable storage means is preferable. Next, EE
Means for setting an individual address for each fire detector 4 other than storage means such as a PROM, an address setting method by replacing a resistance element, an address setting method by setting a resonance frequency from a coil and a varicap,
An address setting method or the like in which the frequency is automatically set in the connection order by providing the coil and the resistance component in the signal line portion may be used. Similarly, the final setting unit may be configured in a hardware manner, such as using a switch element or a terminating resistor without using the storage unit.

Next, as another embodiment, although not shown in detail, a case where the outdoor inspector 12 has an empty address setting section will be described.

As an example of this system, although not shown, it is assumed that the address 4 is assigned to the fire detector 4 of the address 3 with reference to the room 101 (R101) in FIG. Then, an empty address setting unit is provided in a storage area (not shown) of the outdoor inspection device 12, and by storing the address 3, it is set that the fire detector of the address 3 does not exist.

Here, similar to the above embodiment, as a specific signal transmission flow, first, the outdoor inspector 12 outputs a preparation signal, and outputs a header signal, an inspection mode, a code signal of address 1, a footer, and the like. Output a signal. Next, the fire detector 4 of the address 1 responds with the address 1 and the code signal of the normal signal. Then, the outdoor inspection device 12 outputs the header signal, the inspection mode, the code signal of the address 2, and the footer signal. Next, fire detector 4 of address 2
Responds with the address 2 and the code signal of the normal signal.
Then, the outdoor inspection device 12 outputs the header signal, the inspection mode, the code signal of the address 3, and the footer signal. Here, no response signal is generated because the fire detector at address 3 does not exist. Next, the outdoor inspection device 12 outputs a header signal, an inspection mode, a code signal of address 4, and a footer signal. The fire detector 4 at address 4 responds with the code signals of the final signal and the normal signal. Finally, outdoor checker 1
2 outputs an END signal and ends the signal transmission. Thereafter, when the outdoor inspector 12 determines the state of each fire detector from the response signal, the address 3 is abnormal if the above condition is maintained. However, the address 3 is stored in the empty address setting unit (not shown) of the outdoor inspector 12. Is set to be empty, so no response is not determined to be abnormal.

As described above, since the outdoor inspector 12 can recognize the final address of each room by the response from the fire detector 4, when one outdoor inspector 12 is shared by each room,
It is not necessary to check the number of installations in each room, and it is possible to reliably recognize whether each address is normal or abnormal. Here, the empty address may be determined at the time of display after the inspection operation, but may be compared and identified at a non-response timing, and the empty address may be read in advance and no signal is sent. .

Here, the outdoor inspection device 1 in each of the above embodiments.
Reference numeral 2 denotes an example of a receiving unit, and the fire detector 1 itself may perform the inspection operation of the outdoor inspector 12. In addition, in the case of a so-called R-type system in which each fire detector 4 is individually recognized via the signal line 2 to perform monitoring control, the receiving unit may be the fire receiver 1 directly, or similar monitoring control. If you can
In addition, a device connected to the signal line 2 may be used.

As described above, in the above embodiment, each of the fire detectors 4 has the address setting unit 42 in which a continuous and separate address is set, and the receiving unit uses each of the fire detectors 4 according to the address. Each fire detector 4 further has a final setting unit 43 which is set to be the last address recognized by the receiving unit. When the individual fire detectors 4 respond individually, the final fire detector 4 can be easily identified, and when the automatic inspection function is performed, the number of inspection targets is compared with the number of responses, or the receiver is replaced. Also, the number of installations can be easily determined from the final address.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing a system.

FIG. 2 is a schematic block circuit diagram of the fire detector of FIG. 1;

[Explanation of symbols]

 2 signal line 4 fire detector 12 checker

Claims (2)

[Claims] 1. A fire alarm in which a plurality of fire detectors are connected to a signal line from a receiving unit such as a fire receiver, wherein each of the fire detectors has an address setting in which a continuous and separate address is set. And a receiving unit,
Each of the fire sensors is individually recognized by the address, and each of the fire sensors has a final setting unit that is set to be the last address recognized by the receiving unit. Features a fire alarm. 2. The fire alarm according to claim 1, wherein the receiving section has an empty address setting section for setting an empty address among consecutive addresses.