JP2008210037A - Fire alarm system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire alarm system capable of simply performing an operation test in a cooperative fire alarm system constituted of a plurality of fire alarm units. <P>SOLUTION: The fire alarm system includes a plurality of fire alarm units 1, 2 respectively having fire detectors 12, 22 for detecting a fire cause and alarm senders 14, 24 emitting an alarm sound on receipt of a cooperative signal from another fire alarm unit. Among the above fire alarm units, at least one fire alarm unit is constituted of a fire alarm unit with test button, having a test button 11a. When the test button of the fire alarm unit with test button is operated, a test start signal is transmitted to the test means of the above fire alarm unit, and also the test start signal is transmitted to the signal transmitter/receiver means of the other fire alarm units. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a so-called interlocking type composed of a plurality of fire alarms each provided with a fire detection unit for detecting a fire factor and having an alarm unit that sounds an alarm sound when receiving an interlocking signal from another fire alarm. The improvement of the fire alarm system.

  This type of fire alarm system has recently been used in private houses, etc., and when one of the fire alarms connected to the signal line detects a fire factor, it detects the fire factor. The fire alarm that has been sounded by itself emits an alarm sound and also sends an interlocking signal to other fire alarms, and the other fire alarms are configured to sound and output an alarm sound in conjunction with this.

The following Patent Document 1 describes a fire alarm system configured by connecting a plurality of fire alarms as described above in parallel. According to this, each of the child alarms is 2 to 2 from the parent alarm. Since it operates by receiving drive power from a line power supply circuit supplied to the linear signal line, it is not necessary to provide a circuit for generating drive power in the child alarm device, and the circuit configuration of the child alarm device can be simplified.
JP 2005-339032 A

In the fire alarm system as described above, if the alarm stop button of one of the fire alarm devices other than the fire alarm device that detected the fire is pressed, the interlock alarm of the fire alarm device controlled in conjunction is stopped. The fire source can be specified by adopting a configuration in which only a fire alarm device that detects a fire continues to sound an alarm sound.
However, in the above fire alarm system, although the interlock alarm is made as described above, the operation test of the internal circuit or the like cannot be performed by a single operation, and the test button provided in each fire alarm device is set. It was necessary to perform each pressing operation, which was troublesome. In addition, when the operation test of a plurality of fire alarms is performed with a single operation, the failure state of each fire alarm cannot be determined by the fire alarm that has been operated, which is a problem.

  Therefore, the present invention has been proposed in view of the above circumstances, and provides a fire alarm system that can easily perform an operation test in an interlocking fire alarm system composed of a plurality of fire alarm devices. For the purpose.

In order to achieve the above object, the fire alarm system according to the invention of claim 1 is provided with a fire detection unit for detecting a fire factor, and an alarm sound is generated when an interlocking signal is received from another fire alarm. In the fire alarm system composed of a plurality of fire alarms having a section, each of the above fire alarms receives a test start signal for performing an operation test, and whether or not its own internal circuit is operating normally. The test means that performs notification according to the result through the alarm unit, and when a fire is detected by the fire detection unit, the interlock signal is transmitted to the other fire alarm and the other fire alarm A signal transmission / reception means for receiving the interlocking signal and the test start signal, and at least one of the fire alarms is a fire alarm with a test button provided with a test button. When the test button of the fire alarm with the test button is operated, the test start signal is transmitted to the test means of the fire alarm, and the signal transmitting / receiving means of another fire alarm Is configured to transmit the test start signal.
Here, the operation test refers to an operation test of an internal circuit such as whether the sensor of the fire detection unit operates normally.

The fire alarm system according to the invention of claim 2 is a normal monitoring signal in which the fire alarm is connected by a signal line, and the voltage level of the signal line is monitored to determine at least the normal monitoring state. And a voltage monitoring means for discriminating each of a fire detection signal determined to be an actual fire state and a test start signal determined to be an operation test execution start state. Furthermore, in the fire alarm system according to the invention of claim 3, the fire alarm device includes a parent alarm device having a power circuit and a child alarm which does not have a power circuit and receives power supply from the parent alarm device through the signal line. The fire alarm with the test button is the parent alarm device.
And if the fire alarm system which concerns on invention of Claim 4 determines that there exists a failure as a result of performing the said operation test, it will transmit a failure signal to another fire alarm device.

  According to the fire alarm system described in claim 1, when the test button of the fire alarm with a test button is operated among the fire alarms, a test start signal is transmitted to the test means of the fire alarm. At the same time, it is configured to transmit a test start signal to the signal transmitting / receiving means of the other fire alarm. Therefore, if the test button of the fire alarm with a test button is operated, the operation test of all the fire alarms can be performed with a single operation, so that it is not necessary to perform the operation test for each fire alarm. In addition, since the operation test of a plurality of fire alarms can be performed by operating one fire alarm in the fire alarm system, the time required for the operation test can be shortened.

  According to the fire alarm system described in claim 2, since it further comprises voltage monitoring means for monitoring the voltage level of the signal line and discriminating at least a normal monitoring signal, a fire detection signal, and a test start signal, Without complicating the wiring of the signal line, it is possible to monitor and discriminate the operation status of the fire alarm connected to the signal line with a simple configuration.

According to the fire alarm system described in claim 3, the fire alarm device includes a parent alarm device having a power circuit, and a child that does not have a power circuit and receives power supply from the parent alarm device through the signal line. A fire alarm with a test button can be used as a parent alarm. That is, since only the parent alarm device can be provided with the test button, the cost of the entire fire alarm system can be reduced as compared with the case where all the fire alarm devices are provided with the test button.
Moreover, since the fire alarm device provided with the test button is only the parent alarm device among a plurality of connected fire alarm devices, it is possible to easily identify the parent alarm device.

  According to the fire alarm system described in claim 4, when it is determined that there is a failure as a result of executing the operation test, a failure signal is transmitted to another fire alarm. It can be determined that there is a faulty fire alarm.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing an example of a main configuration of a fire alarm constituting the fire alarm system of the present invention, FIG. 2 is a diagram showing an example of a schematic configuration of the fire alarm system of the present invention, and FIG. FIG. 4 is a diagram showing a transition of a voltage level supplied to a signal line, and FIG. 5 is a flowchart showing an example of a basic operation in an operation test. In the following, the fire alarm when the fire factor is detected and the alarm is output is referred to as a fire alarm. The alarm is output when the alarm is output by the interlock signal from another fire alarm. An alarm to be performed when it is determined that there is a failure by an alarm or operation test will be described as a failure alarm.

  The fire alarm system shown in the figure is configured by connecting a plurality of interlocking fire alarm devices 1 and 2 each having a fire detection unit 12 and 22 to be described later via a two-wire signal line L. Reference numeral 1 denotes a parent alarm device serving as a parent device. Reference numeral 2 denotes a child alarm device connected to the parent alarm device 1 by a signal line L. The fire alarm device serving as the parent alarm device 1 is supplied with power from a commercial power supply (100 V), and the fire alarm device serving as the child alarm device 2 is supplied with power from the parent alarm device 1 through the signal line L. .

As shown in FIG. 1, the parent alarm device 1 detects a fire factor such as smoke, heat, etc., an operation unit 11 composed of various operation buttons such as a power supply circuit 10 for supplying power, a button for stopping alarm sounding, and the like. Fire detection unit 12 composed of sensors and the like, CPU and the like, alarm unit 14, each unit, control unit 13 for controlling each circuit, alarm unit 14 for outputting an alarm by sound, light, etc., signal line L It includes at least a voltage monitoring circuit 15 that monitors the voltage level, a storage unit 16 that stores a notification history, and a signal transmission / reception unit 17 that transmits and receives signals to and from the child alarm device 2 connected by the signal line L.
The plurality of child alarm devices 2 connected in parallel to the parent alarm device 1 and the signal line L are not provided with a power circuit because the power is supplied through the signal line L as described above. The child alarm device 2 is different from the parent alarm device 1 in that the operation unit 21 is not provided with a test button, but the other configuration and operation are the same as the parent alarm device 1 unless otherwise described. Unit 21, fire detection unit 22, control unit 23, alarm unit 24, voltage monitoring circuit 25, storage unit 26, and signal transmission / reception unit 27.
In FIG. 1, only one block diagram of the child alarm device 2 is shown, but in a normal fire alarm system, a plurality of child alarm devices 2 are connected to constitute a fire alarm system.

  In FIG. 2, reference numerals 1a and 2a are indicator lights. In a normal monitoring state, a green illuminator is lit, a red illuminator is lit at the time of a fire alarm, a green illuminator is blinked at a test alarm, and at a failure alarm The state of the fire alarms 1 and 2 is notified by light, such as blinking a red light emitter. Reference numerals 1b and 2b denote speakers, which notify the state of the fire alarms 1 and 2 by sound. For example, a voice message such as “Fire is fired” at the time of a fire alarm, “Normal” or “Test” at the time of a test alarm, “Failure” at the time of a failure alarm, or a ringing sound such as “Woo” is output. The notification may be either a notification by an indicator lamp or a notification by sound. Hereinafter, a case will be described in which the operation state of the parent alarm device 1 and the child alarm device 2 is notified by a voice message.

  In the fire alarm system, not only the primary alarm device 1 and the secondary alarm device 2 that detected the fire factor give a fire alarm, but also sends an interlock signal to the other fire alarm devices 1 and 2, and the other fire alarm devices are interlocked. In addition to having an interlocking alarm control function for performing an alarm, an operation test function for confirming whether the sensor is operating normally and whether the alarm is sounded normally by the alarm units 14 and 24, failure in the operation test There is a failure notification function to notify if there is. The test means of the parent alarm device 1 and the child alarm device 2 is configured by combining the control units 13 and 23 with each part and each circuit, and the signal transmission / reception means is the control units 13 and 23 with the signal transmission / reception units 17 and 27, voltage. The monitoring means includes a control unit 13, 23 voltage monitoring circuits 15 and 25, and signal transmission / reception units 17 and 27.

First, interlocking alarm control from the parent alarm device 1 to the child alarm device 2 will be described.
The fire detection unit 12 of the parent alarm device 1 measures the amount of smoke particles, the amount of heat, etc., and sends a fire detection signal to the control unit 13 when the value exceeds a preset threshold value. When receiving the detection signal, the alarm unit 14 outputs a fire alarm.
The control unit 13 that has received the fire detection signal from the fire detection unit 12 sends the interlocking signal to the child alarm device 2 connected via the signal line L via the signal transmission / reception unit 17, and the child alarm that has received the interlocking signal. The device 2 outputs a linked alarm from the alarm unit 24. Specifically, the interlock control signal is first received by the interlock control signal monitoring unit 26, sent to the control unit 23, and an interlocking alarm is output from the alarm unit 24.
Here, a case has been described in which an actual fire occurs in a place where the parent alarm device 1 is installed, and a linked alarm is performed in the child alarm device 2 installed in another place. However, the present invention is not limited to this. Needless to say, interlocking alarm control is performed on the alarm device 1 from the child alarm device 1 to another child alarm device 1.

Next, operation test control will be described. Here, an example will be described in which the test button 11a of the parent alarm device 1 is operated to perform its own operation test and the operation test of the connected child alarm device 2. However, when the child alarm device 2 also includes the test button 11a. The test signal is sent from the child alarm device 2 to the parent alarm device 1, and from the child alarm device 2 to the other child alarm device 2, and the control is performed in the same manner as described below.
When the test button 11a provided in the parent alarm device 1 is operated, a test start signal is sent to the control unit 13, and the control unit 13 that has received the test start signal sends a test signal equal to or higher than a normal threshold level to the fire detection unit 12. The fire detection unit 12 performs an operation test to determine whether or not to perform a fire discrimination operation (internal circuit operation test). The control unit 13 that has received the test start signal transmits a test signal to its own alarm unit 14 and outputs a test alarm (alarm operation test). And the control part 13 transmits a test start signal to the signal transmission / reception part 27 of the child alarm device 2 while performing its own alarm operation test.
The signal transmitting / receiving unit 27 of the child alarm device 2 that has received the test start signal from the parent alarm device 1 transmits the test start signal to its own control unit 23, and performs its own internal circuit operation test and alarm by the same control as described above. Perform an operation test.

Next, failure notification control will be described.
If it is determined that there is an abnormality in the sensor or the like by the above-described internal circuit operation test, it is determined that there is a failure and a failure signal is transmitted to the control units 13 and 23. Therefore, the control units 13 and 23 that have received the failure signal output a failure alarm at the alarm units 14 and 24.
Then, the child alarm device 2 determined to have a failure by the internal circuit operation test continues to transmit a failure signal to the signal transmission / reception unit 17 of the parent alarm device 1 until a failure alarm is stopped. The failure notification control will be described later with reference to FIG.

Next, the interlock control when the test start control is performed by changing the voltage level supplied on the signal line L will be described.
FIG. 3 is a diagram showing an example of the circuit configuration of the signal transmitting / receiving means provided in the parent alarm device of the present invention, and FIG. 4 is a diagram showing the transition of the voltage level of the parent alarm device of the present invention. Here, the voltage level V1 is output in the normal monitoring state, the voltage level V2 is output in the actual fire state, and the voltage level V3 is output between the output terminals T1 and T2 in the operation test state and the failure state. A fire detection signal and a test start signal are generated. Also, in FIG. 3, V is a power supply voltage, R is a resistor, and D is a diode, and these constitute the power supply circuit 10.
In this description, the case where an actual fire occurs in the place where the parent alarm device 1 is installed and the interlock alarm is performed in the child alarm device 2 installed in another room is described. It goes without saying that the same interlocking alarm control is performed from the alarm device 2 to the parent alarm device 1, and from the child alarm device 2 to the other child alarm devices 2.

In the normal monitoring state, the voltage level is V1, but when the control unit 17 receives a fire detection signal of an actual fire, the transistor Tr2 is turned on, and the voltage between the output terminals T1 and T2 is lowered by the Zener voltage of ZD1 + ZD2, and the output terminal The potential difference between T1 and T2 becomes V2, and the voltage level V2 is output to the signal line L.
Then, this interlock signal is sent to the signal transmitter / receiver 27 of the child alarm device 2 connected via the signal transmitter / receiver 17 as the interlock signal of the fire detection state.
On the other hand, at the voltage level V1 in the normal monitoring state (see FIG. 4), when the operation button 11a is operated and the control unit 17 receives the test start signal, the transistor Tr1 is turned on, and the ZD1 Zener voltage causes the output terminal T1, The voltage between T2 is dropped, the potential difference between the output terminals T1 and T2 becomes V3, and the voltage level V3 is output to the signal line L (see FIG. 4).
And this is transmitted to the connected child alarm device 2 as a test start signal.

Here, an operation test is performed using the test start signal as a trigger, and if there is no abnormality in the fire detection unit 12, the voltage level V1 is restored (the transition of the voltage level is not shown). On the other hand, when it is determined by the operation test that the fire detection unit 12 has a failure, the voltage level is kept at V3 until the test button 11a is operated again and reset, and the test button 11a is operated. Then, it is configured to return to the voltage level V1 in the normal monitoring state (see FIG. 4).
The configuration of the voltage level is not limited to this example. If the voltage level of the failure signal transmitted from the child alarm device 2 is different, or if it is a pulse signal or a radio signal, its own failure signal and child alarm. The failure signal of the device 2 can be distinguished.
As described above, the voltage level of the signal line L is monitored and the normal monitoring state, the actual fire state, and the operation test state are discriminated. Therefore, the signal line L can be easily configured without complicating the wiring of the signal line L. The operation status of the parent alarm device 1 and the child alarm device 2 connected to the line L can be monitored and determined.

Next, an example of failure notification control will be described based on the flowchart of FIG.
The left side of FIG. 5 shows the operation of the parent alarm device 1, and the right side shows the operation of the child alarm device 2.
First, when the test button 11a of the parent alarm device 1 is operated (step 100), a test start signal is transmitted to the control unit 23 via its own control unit 13 and the signal transmission / reception unit 27 of the child alarm device 2 (step 100). Step 101). Then, the operation test of the parent alarm device 1 is performed by the above-mentioned test means, a failure diagnosis is performed (step 102), and when it is determined that there is a failure, the indicator light 1a blinks and a failure alarm such as “failure” The operation is performed (steps 103 and 104), and when it is determined that there is no failure, a test alarm operation is performed such as “normal” (step 106).

On the other hand, when the child alarm device 2 receives the test start signal from the parent alarm device 1 (step 200), an operation test is performed in the above-described test means, a failure diagnosis is performed (step 201), and there is a failure. If it is determined that the failure is detected, the alarm unit 24 performs a failure alarm operation such as “failure” (step 204), and transmits a failure signal to the parent alarm device 1 (step 203). The parent alarm device 1 that has received the failure signal (step 105) issues an interlock failure alarm such as “the other alarm devices are abnormal” (step 107).
Here, in the present invention, since the slave alarm device 2 on the interlocking side continues to transmit a fault signal in the event of a failure, it can be determined that there is a fault even in another location, and the above-described interlocking In the failure alarm, the output of the failure signal can be stopped by stopping the alarm stop button (not shown) of the child alarm device 2 that performs the failure alarm. The alarm device 1 may not particularly perform a notification operation.

  As described above, in the fire alarm system of the present invention, the circuit configurations of the parent alarm device 1 and the child alarm device 2 are not limited to those shown in the figure, and an example in which only the parent alarm device 1 is provided with the operation button 11a will be described. However, it goes without saying that each child alarm device 2 may be provided with a test button. Moreover, the notification method of the parent alarm device 1 and the child alarm device 2 is not limited to the above, and the volume and sound quality can be varied.

It is a block diagram which shows an example of the principal part structure of the fire alarm which comprises the fire alarm system of this invention. It is a figure which shows an example of schematic structure of the fire alarm system of this invention. It is a figure which shows an example of the circuit structure of a signal transmission / reception means. It is a figure which shows transition of the voltage level supplied on a signal wire | line. It is a flowchart which shows an example of the basic operation regarding an operation test.

Explanation of symbols

1 Fire alarm (parent alarm)
2 Fire alarm (child alarm)
12, 22 Fire detection unit 13, 23 Control unit (CPU)
14, 24 Alarm unit 15, 25 Storage unit 17, 27 Signal transmission / reception unit L Signal line

Claims (4)

In the fire alarm system that consists of multiple fire alarms with fire detectors that each have a fire detector that detects the cause of the fire, and that receives an interlocking signal from other fire alarms.
Each of the above fire alarms
When receiving a test start signal for performing an operation test, it is determined whether or not its internal circuit is operating normally, and a test means for performing notification according to the result through the alarm unit;
When the fire is detected by the fire detection unit, the interlock signal is transmitted to another fire alarm device, and the signal transmission / reception means for receiving the interlock signal and the test start signal from another fire alarm device is provided.
Among the fire alarms, at least one fire alarm is a fire alarm with a test button provided with a test button, and when the test button of the fire alarm with the test button is operated, the fire alarm A fire alarm system in which the test start signal is transmitted to the test means of the tester and the test start signal is transmitted to the signal transmitting / receiving means of another fire alarm. In claim 1,
The fire alarm is connected by a signal line, and further includes a voltage monitoring means for monitoring a voltage level of the signal line and discriminating at least a normal monitoring signal, a fire detection signal, and a test start signal. system. In claim 2,
The fire alarm is composed of a parent alarm device having a power circuit and a child alarm device not having a power circuit and receiving power supply from the parent alarm device through the signal line. Is a fire alarm system which is the above parent alarm device. In any one of Claims 1 thru | or 3,
A fire alarm system configured to transmit a failure signal to another fire alarm device when the test means determines that there is a failure as a result of executing the operation test.

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