JP2009003494A - Fire alarm system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire alarm system having a cooperative alarm function capable of making each fire alarm unit start reproducing a fire alarm by voice message at the same timing. <P>SOLUTION: The fire alarm system 1 includes a plurality of fire alarm units 11 and 12, and an alarm synchronizing device 13 for generating a synchronizing pulse signal set as timing when each of the fire alarm units 11 and 12 should start outputting alarm, and outputting the generated synchronizing pulse signal. The fire alarm units 11 and 12 each include a reception means 11f for receiving the synchronizing pulse signal, and an alarm output means 11b for registering a predetermined voice message set as a fire alarm and repeatedly reproducing the voice message, synchronizing with the synchronizing pulse signal while an alarm should be associated and output. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention has an interlocking function that is installed on the ceiling surface of each room of a dwelling unit, and includes a plurality of fire alarms that interlock with each other when a fire factor such as heat or smoke is detected. It relates to the improvement of fire alarm system.

As an example of a fire alarm system having the above interlocking function, the following patent document 1 describes a child that does not have a line power supply circuit in at least one parent alarm device having a line power supply circuit. A fire alarm system composed of alarm devices is disclosed, in which a parent alarm device and a child alarm device are connected in parallel with a two-wire signal line, and each of the parent and child alarm devices has a smoke detector. When a fire factor such as heat is detected, the voltage level of the two-wire signal line is lowered to a predetermined notification level, and other alarm devices have a predetermined voltage level generated on the two-wire signal line. When it is determined that the voltage has dropped, the alarm is output in conjunction.
JP 2005-339032 A

In the fire alarm system as described above, since all alarm devices sound in conjunction with each other, there is an advantage that the fire alarm is not missed in any room.
However, when a voice message is output as a fire alarm, the timing for starting the playback of the voice message in each fire alarm device has not been specified in the past, so multiple fire alarm devices are installed close to each other. However, there is a problem that the voice messages reproduced at different timings reach the ear at the same time, and it is difficult to hear the contents. In addition, while the voice message is repeatedly reproduced, the timing of reproduction by each of the fire alarms shifts, and it may become difficult to hear.
The present invention solves such a problem, and provides a fire alarm system in which each of the fire alarm devices starts to reproduce a fire alarm by a voice message at the same timing.

  The fire alarm system according to claim 1 as the first aspect of the present invention includes a plurality of fire alarm devices that, when a fire factor is detected, output an alarm in conjunction with other fire alarm devices, An alarm synchronizer that generates and outputs a synchronization pulse signal for each alarm device to start alarm output, the fire alarm device receiving means for receiving the synchronization pulse signal, the fire alarm, And a warning output means for repeatedly reproducing the voice message in synchronization with the synchronization pulse signal while the predetermined voice message is registered in advance and should be output in conjunction with the alarm. .

  A fire alarm system according to a second aspect of the present invention is the fire alarm system according to the first aspect, wherein the alarm synchronizer is configured as a fire alarm master unit having a power supply circuit that supplies power to another fire alarm unit serving as a fire alarm slave unit. It is characterized by.

  The fire alarm system according to claim 3 as a second aspect of the present invention comprises a plurality of fire alarm devices that, when detecting a fire factor, output an alarm by itself and output an alarm in conjunction with other fire alarm devices, When each of the fire alarms detects a fire factor by itself, an alarm synchronization means for generating and outputting a synchronization pulse signal for each of the fire alarms to start alarm output; and the synchronization pulse signal A receiving means for receiving and a warning output means for repeatedly starting reproduction of the voice message in synchronism with the synchronization pulse signal while a predetermined voice message for the fire alarm is registered in advance and the alarm should be output in conjunction It is characterized by having.

  In the fire alarm system according to claim 1 or 2, when the alarm synchronization means outputs a synchronization pulse signal, each of the fire alarms outputs a voice message to be a fire alarm in synchronization with the synchronization pulse signal. Since the reproduction is started repeatedly, the contents of the voice message can be easily heard even when a plurality of fire alarms are installed close to each other.

  In particular, in the fire alarm system according to claim 2, since the alarm synchronizer is configured as a fire alarm master unit, it is not necessary to provide the alarm synchronizer specially. Therefore, there is an advantage that it is advantageous in terms of cost and can save time and labor for system construction.

  In the fire alarm system according to claim 3, each of the fire alarms generates a synchronization pulse signal when the fire alarm is detected, and each of the fire alarms is synchronized with the synchronization pulse signal. Since it is the structure which repeats and reproduces | regenerates the voice message used as a fire alarm, even when the several fire alarm is installed close, it becomes easy to hear the content of the voice message. In addition, since the fire alarm that detects the fire factor transmits a synchronous pulse signal, the alarm can be quickly output in conjunction with it. Moreover, such a configuration is particularly effective in a fire alarm system that outputs alarms in conjunction with each other wirelessly.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram for explaining the basic configuration of the first embodiment of the present invention. This fire alarm system 1 includes a fire alarm master unit 11 and a plurality of fire alarm slave units 12 as fire alarms. Only one fire alarm unit 12 is illustrated, although it is connected by a two-wire signal line L.
The present invention is characterized by the provision of an alarm synchronizer 13 that generates and outputs a synchronization pulse signal at the timing at which each of the fire alarms should start alarm output. However, it is set as the structure which functions as the alarm synchronizer 13. FIG.

  First, the fire alarm master unit 11 will be described. As a basic configuration, a power source circuit 11a that generates a power source for operating itself and the fire alarm slave unit 12 from a commercial power source, and an alarm output that has a speaker or the like and outputs a fire alarm Means 11b, fire detection means 11c having a heat sensor or smoke sensor, etc., operation means 11d having a switch operated by a push button or a hanging strap, etc., and transmission means for outputting an interlocking signal or the like to the signal line L 11e, receiving means 11f for receiving an interlocking signal or the like from the signal line L, and control means 11g constituted by a microcomputer or the like for controlling each of these means.

Here, the power supply circuit 11a has a predetermined internal impedance, supplies DC power to each of the means 11b to 11g, and supplies the power to each of the fire alarm devices 12 through the signal line L.
The alarm output means 11b is composed of a voice IC or the like in which a predetermined voice message that becomes a fire alarm is registered in advance, such as “Fire has occurred. Please evacuate”. A voice message is read and played from a speaker.
The fire detection means 11c is composed of a drive circuit and a comparator of various sensors that detect a fire factor such as a heat sensor or a smoke sensor. When the detection signal of the sensor exceeds a threshold value, the fire detection means 11c notifies the control means 11g of fire detection.
The operation means 11d notifies the control means 11g when the switch is operated. Examples of the operation include an alarm stop operation and an operation test operation.
The transmission means 11e outputs an interlocking signal, an alarm stop signal, an operation test signal, etc. to the signal line L in accordance with the transmission command of the control means 11g. Each alarm device also has a function as alarm synchronization means 13a for generating and outputting a synchronization pulse signal at a timing when alarm output should be started. The interlock signal, the alarm stop signal, the operation test signal, and the synchronization pulse signal may be transmitted by setting the voltage level of the signal line L to a specified voltage level. For example, in normal times, the signal line L is at the power supply level V, which is 0.9 V when the interlocking signal is output, 0.8 V when the synchronization pulse signal is output, 0.7 V when the operation test signal is output, and alarm stop At the time of signal output, it may be 0.6V. The circuit for that purpose can be constituted by, for example, a combination of a plurality of reverse-polarity zener diodes that are passed through a power supply and switch elements that control energization of these zener diodes. Further, a unique frequency may be assigned to each of the interlocking signal, ringing stop signal, operation test signal, and synchronization pulse signal, and transmitted by frequency multiplexing. Or it is good also as the multiplex transmission by digital communication. In the present invention, there is no restriction on the transmission system of these signals.
The receiving means 11f is constituted by a receiving circuit corresponding to the transmission method of the transmitting means 11e. When receiving the interlocking signal, ringing stop signal, operation test signal or synchronization pulse signal, the receiving means 11f notifies the control means 11g of it. The transmission source of these signals may be oneself, or may be other than itself, that is, another fire alarm unit 12.
The transmission unit 11e and the reception unit 11f may be configured as a wireless transmission unit and a wireless reception unit, and may transmit the above signals to each other by wireless communication.

It is desirable that the control means 11g adopt not only a CPU but also a high-performance microcomputer in which a ROM, a RAM, a programmable I / O storing a control program, a timer for measuring a desired time, and the like are integrated on one chip. In this case, the alarm output unit 11b, the fire detection unit 11c, the operation unit 11d, the transmission unit 11e, and the reception unit 11f can be connected through a programmable I / O, and the configuration is compared with connection through an address and data bus. It will be easy.
In addition, the control unit 11g periodically checks events such as detection of a fire factor by the fire detection unit 11c and notification of reception of the interlocking signal by the reception unit 11f, and performs basic processing in a form that performs corresponding processing when the event occurs. Is programmed.
More specifically, when a fire detection is received from the fire detection means 11c, a fire determination process is started according to a predetermined algorithm in order to prevent erroneous detection. There is no limitation on the algorithm for the determination, but in a simple example, a fire may be determined if a predetermined number of notifications are received within a predetermined time from the time when the first notification is received. When a fire is determined, an instruction to transmit an interlocking signal is issued to the transmitting means 11e to output the interlocking signal. The interlock signal may be continuously output or may be output for a predetermined time.
Further, when the reception notification of the interlocking signal is received from the receiving unit 11f, the synchronous control + alarm output mode is set. In this mode, the interlocking signal is validated and is continued for at least a predetermined time. During this time, in order to measure the time interval for transmitting the synchronization pulse signal, the timer is repeatedly operated, and whenever the time is up, the transmission means 11e is instructed to transmit a synchronization pulse signal to output a pulse.
When the reception notification of the synchronous pulse signal is received from the reception unit 11f, if the synchronous control + alarm output mode is in effect at that time, a regeneration command is issued to the alarm output unit 11b, and the fire alarm is synchronized with the pulse. Play a voice message.
Here, since the synchronization pulse signal is simultaneously received by each of the fire alarm master unit 11 and the fire alarm slave unit 12, the timing of starting the reproduction of the voice message in each unit matches. In addition, since the voice message “Fire has occurred. Please evacuate” is played once in one pulse, the voice message is played back repeatedly by processing the pulse continuously. The
Moreover, when the reception notification of the alarm stop signal is received from the reception unit 11f, the synchronous control + alarm output mode is forcibly canceled and the cancellation state is continued for a predetermined time.
Further, when the switch operation is notified from the operation means 11d, the duration of the switch operation state is measured, and it is determined from the measurement result whether the operation is an alarm stop operation or an operation test operation. For example, if it is less than 3 seconds, an alarm stop operation, and an operation of 3 seconds or more may be regarded as an operation test operation. If it is determined that the alarm stop operation is performed, an alarm stop signal transmission command is issued to the transmission unit 11e to output the alarm stop signal.
FIG. 2 shows the basic processing of the control means 11g as a flowchart (101 to 115), but the processing related to the operation test is omitted for simplification.

  FIG. 3 is a schematic waveform diagram showing the level change of the signal line L after the fire determination according to the time change. At time T1, either the fire alarm master unit 11 or the fire alarm slave unit 12 determines the fire. Output the interlocking signal. By receiving this interlocking signal, the fire alarm master unit 11 and the fire alarm slave unit 12 enter the alarm output mode. During the alarm output mode, the fire alarm master unit 11 measures a predetermined time ΔT by a timer and outputs a synchronization pulse signal every time the time is up (time T2, T3, T4, T5, T6). At the timing of receiving this synchronization pulse signal, the fire alarm master unit 11 and the fire alarm slave unit 12 start to reproduce a voice message that is a fire alarm. Thereafter, at time T7, the alarm stop operation is performed in the fire alarm master unit 11 or the fire alarm slave unit 12, and an alarm stop signal is output accordingly.

Next, the fire alarm device 12 will be described, but its basic configuration is similar to that of the fire alarm parent device 11, and thus the same reference numerals are assigned to common components and description thereof is omitted.
The difference from the fire alarm master unit 11 is that the fire alarm slave unit 12 does not include the power supply circuit 11a and operates with the power supplied through the signal line L. Moreover, the transmission means 11e provided in the fire alarm device 12 does not include a function as the alarm synchronization means 11h.
The basic processing of the control means 11g provided in the fire alarm slave unit 12 is similar to that of the fire alarm master unit 11, except that a synchronization pulse signal transmission command is not performed in the alarm output mode.
FIG. 4 shows the basic process of the fire alarm unit 12 as a flowchart (201 to 209).

In addition, in the said Example, although the alarm synchronizer 13 is comprised as the fire alarm main | base station 11, the alarm synchronizer 13 is good also as an independent structure.
FIG. 5 is a block diagram illustrating a schematic configuration of the independent alarm synchronizer 13, and the same reference numerals are assigned to the same components as those in the above embodiment, and the description thereof is omitted.
Since both the fire alarm master unit 11 and the fire alarm slave unit 12 in this embodiment operate by the same basic process as the fire alarm slave unit 12 described above, description of the basic process is omitted (the flowchart of FIG. 4 is omitted). See).
When the alarm synchronizer 13 receives a transmission unit 11e having a function as an alarm synchronization unit 13a that generates and outputs a synchronization pulse signal, and an interlock signal and a ringing stop signal, it notifies the control unit 11g of the reception. Receiving means 11f and control means 11g are provided.
The basic processing of the control unit 11g will be briefly described. When the event is monitored and the notification of the interlocking signal reception is received from the reception unit 11e, the synchronous control mode is set. In this mode, the timer is repeatedly operated to increase the time. Then, a synchronization pulse signal transmission command is issued, and the transmission means 11e outputs the synchronization pulse signal. Thereafter, when a notification of alarm stop signal reception is received from the receiving means 11f, the synchronous control mode is forcibly canceled and the release state is continued for a predetermined time.
FIG. 6 shows the basic process of the control means 11g provided in the alarm synchronizer 13 as a flowchart (301 to 310).

  In the above embodiment, when the alarm synchronization means 13 detects the interlock signal, it outputs a synchronization pulse signal, and each of the fire alarm master unit 11 and the fire alarm slave unit 12 synchronizes with this synchronization pulse signal and fires. Since it is the structure which repeats and reproduces | regenerates the voice message used as an alarm, even when the fire alarm main unit 11 and the fire alarm sub unit 12 are installed close to each other, the contents of the voice message can be easily heard. In particular, when the alarm synchronizer 13 is configured as the fire alarm master unit 11, it is not necessary to provide the alarm synchronizer specially, which is advantageous in terms of cost and can save the labor of system installation. .

Further, as the second embodiment, a configuration in which each of the fire alarm master unit 11 and the fire alarm slave unit 12 includes the alarm synchronization means 13a is also possible.
FIG. 7 is a block for explaining the basic configuration of the fire alarm system 1 having such a configuration, but the same reference numerals are assigned to the same components as those in the above embodiment, and the description thereof is omitted.
In this configuration, the difference between the fire alarm master unit 11 and the fire alarm slave unit 12 is that only the fire alarm master unit 11 is provided with the power supply circuit 11a. It is a common one that regularly checks for the occurrence of an event such as a notification of fire occurrence or notification of receipt of an interlocking signal, and executes a common basic process that performs a corresponding process when an event occurs.
More specifically, when a fire occurrence notification is received from the fire detection means 11c, the fire discrimination process is started according to a predetermined algorithm. Here, when a fire is determined, the transmission means 11e is instructed to transmit an interlocking signal to output the interlocking signal, and then the synchronous control mode is set. In this synchronous control mode, a timer for measuring a time interval for transmitting a synchronous pulse signal is repeatedly operated, and every time the time is up, a synchronous pulse signal transmission command is issued to output a pulse.
When the notification of the interlock control signal reception is received from the receiving means 11f, the alarm output mode is started. Therefore, when a fire is detected by itself, both the synchronous control mode and the alarm output mode are executed.
When the notification of synchronization pulse signal reception is received, if it is an alarm output mode at that time, an audio message reproduction command is transmitted to the alarm output means 11b in synchronization with the pulse, and an audio message that becomes a fire alarm Play. As a result, the voice message “A fire has occurred. Please evacuate” is played once.
Further, upon receiving the notification of the alarm stop signal reception, the alarm output mode is forcibly canceled, and if it is the synchronous control mode at this time, the synchronous control mode is further cancelled, and thereafter, it waits for a predetermined time.
When the switch operation is notified from the operation means 11d, the duration of the switch operation state is measured by a timer, and it is determined from the measurement result whether the operation is an alarm stop operation or an operation test operation. If it is determined that the alarm stop operation is performed, an alarm stop signal transmission command is issued to the transmission unit 11e to output the alarm stop signal.
FIG. 8 shows the basic process as a flowchart (401 to 417).

  The fire alarm master unit 11 and the fire alarm slave unit 12 generate a synchronization pulse signal when the own unit detects a fire, and each of the fire alarm master unit 11 and the fire alarm slave unit 12 is synchronized with the synchronization pulse signal. And since it is the structure which repeats and reproduces | regenerates the voice message used as a fire alarm, even when the fire alarm main unit 11 and the fire alarm sub unit 12 are installed close to each other, the contents of the voice message can be easily heard. In addition, since the fire alarm master unit 11 and the fire alarm slave unit 12 that have detected the cause of the fire transmit the synchronization pulse signal, the alarm can be output in conjunction with each other quickly. Moreover, such a configuration is particularly effective in a fire alarm system that outputs alarms in conjunction with each other wirelessly.

It is a block diagram explaining the basic composition of the example concerning the 1st present invention. It is a flowchart explaining the basic process of a fire alarm main unit. It is the schematic waveform diagram which showed the level change of the signal wire | line L after fire discrimination according to the time change. It is a flowchart explaining the basic processing of a fire alarm cord. It is a block diagram explaining the basic composition of the Example from which this invention differs. It is a flowchart explaining the basic processing of an alarm synchronizer. It is a block diagram explaining the basic composition of the example concerning the 2nd present invention. It is a flowchart explaining the basic processing of a fire alarm main unit and a sub unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire alarm system 11 Fire alarm main unit 11b Alarm output means 11f Receiving means 12 Fire alarm cord 13 Alarm synchronizer 13a Alarm synchronizer

Claims (3)

When a fire factor is detected, a plurality of fire alarms that output an alarm in conjunction with other fire alarms,
An alarm synchronizer that generates and outputs a synchronization pulse signal for each of the fire alarms to start alarm output;
The fire alarm is
Receiving means for receiving the synchronization pulse signal;
A predetermined voice message for the fire alarm is registered in advance, and an alarm output means for starting to repeatedly reproduce the voice message in synchronization with the synchronization pulse signal is provided while the alarm should be output in conjunction with the fire alarm. Fire alarm system characterized by. In claim 1,
The alarm synchronizer is configured as a fire alarm master unit having a power supply circuit for supplying power to another fire alarm unit serving as a fire alarm unit. When a fire factor is detected, it consists of a plurality of fire alarms that output alarms in conjunction with other fire alarms.
Each of the fire alarms is
An alarm synchronization means for generating and outputting a synchronization pulse signal with a timing at which each of the fire alarms should start alarm output when a fire factor is detected by itself;
Receiving means for receiving the synchronization pulse signal;
A predetermined voice message for the fire alarm is registered in advance, and an alarm output means for starting to repeatedly reproduce the voice message in synchronization with the synchronization pulse signal is provided while the alarm should be output in conjunction with the fire alarm. Fire alarm system characterized by.

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