JP2008009481A - Wireless fire alarm for wireless interlocking alarm, and wireless fire alarm system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To configure a system for achieving interlocking alarm by a fire alarm which can easily be installed in each room of an existing residence. <P>SOLUTION: This wireless fire alarm is provided with a power source input part 11 having a power supply terminal T connected to an external power source; a setting storage means 15 for storing set identification information and a wireless communication control means 16 for wirelessly transmitting/receiving an interlocking control signal. When receiving the interlocking control signal, whether or not identification information included in the received interlocking control signal is matched with identification information stored in the setting storage means 15 is determined, and when those identification information is matched, an interlocking alarm is started. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fire alarm for a dwelling unit that outputs an alarm by itself when a fire is detected and outputs a linked alarm to another fire alarm.

  When installing a fire alarm in each room of a dwelling unit, when a fire is detected, a fire alarm is provided by a fire alarm that has the function of outputting an alarm by itself and outputting an interlocking alarm to other fire alarms. It is desirable to configure the system.

As a well-known example of such a fire alarm device, the following patent document describes that the fire alarm device installed in each room is wired over a transmission line, and when any fire alarm detects a fire, the transmission line A configuration is disclosed in which a fire detection is notified to another fire alarm by changing the voltage level, and an interlocking alarm is made.
JP 2005-339032 A

  However, the fire alarm system with a configuration in which the fire alarm is crossed over the transmission line is very laborious, especially when installing the fire alarm in each room of the existing dwelling unit, such as laying the transmission line behind the ceiling. There is a problem. Therefore, it has been strongly desired to be able to configure a system capable of interlocking alarms with a fire alarm that can be easily installed in each room of an existing house.

  Therefore, as a solution to such a demand, the following fire alarm and fire alarm system are proposed.

  That is, the wireless fire alarm according to claim 1 is installed on a ceiling surface of a dwelling unit and stores identification information pre-assigned to the fire alarm in a fire alarm for a dwelling unit that detects and alarms a fire. A setting storage means; a wireless communication control means for wirelessly transmitting and receiving an interlock control signal; and an alarm control means for starting an alarm when a fire is detected, wherein the wireless communication control means is configured to detect when the fire is detected. The interlock control signal including the identification information stored in the setting storage means is transmitted. On the other hand, when the fire is not detected, the interlock control signal is received when the interlock control signal is received. And the identification information stored in the setting storage means is discriminated, and if they match, the alarm control means can start a linked alarm. It is characterized in.

  The wireless fire alarm according to claim 2 further includes a power input unit having a power terminal connected to an external power source according to claim 1, and the power input unit receives an AC voltage input from the power terminal. It is characterized by being configured as a conversion circuit for converting into a predetermined DC voltage.

  According to a third aspect of the present invention, in the wireless fire alarm device according to the second aspect, the power input unit includes a backup power source that is charged by the DC voltage.

  A wireless fire alarm system according to claim 4 is a fire alarm system including a plurality of wireless fire alarms according to any one of claims 1 to 3, wherein each wireless fire alarm includes: As the identification information, a common system ID is set.

  When the wireless fire alarm device according to claim 1 is a system including a plurality of wireless fire alarm devices, that is, when the fire alarm system according to claim 4 is configured, identification information is included in the interlock control signal. Therefore, it can be determined whether or not the system is an interlocking control signal, and there is no possibility of malfunction due to an interlocking control signal from a similar fire alarm system installed in a neighboring house. In addition, since the interlock control signal is transmitted wirelessly, there is no need to wire between each fire alarm, and the construction is simple.

  According to the second aspect, since the power input unit is configured as a conversion circuit that converts an AC voltage into a DC voltage, it is difficult to cause a problem that the interlock control signal cannot be received due to noise included in the AC power supply. Become.

  According to the third aspect, since the backup power supply is charged during the operation of the fire alarm device, there is no problem that the operation becomes impossible at the time of a power failure because the battery runs out.

  Embodiments of a wireless fire alarm according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of a fire alarm 1 for dwelling units according to the present invention, and FIG. 2 is a configuration diagram of a fire alarm system including a plurality of the fire alarms 1.

  In this system, fire alarms 1 each having the same configuration are installed on the ceiling surface of each room partitioned by walls W. Moreover, the power terminal T of the power cord led out from the fire alarm body is connected to an AC 100V power outlet provided on the wall surface of the room.

  The configuration of the fire alarm 1 will be described more specifically. A power input unit 11 having a power terminal connected to an external power source such as an AC 100V power outlet of a dwelling unit, and a capacitor charged by the power source V output from the power input unit 11 A backup power source 12 composed of, for example, an operation means 13 having a switch SW operated by a hanging string, a fire detection means 14 having a heat or smoke sensor S and detecting fire, and a fire alarm A setting storage means 15 for storing identification information assigned in advance, a wireless communication control means 16 having an antenna AN and wirelessly transmitting and receiving an interlock control signal to another fire alarm 1, and a fire is detected. And an alarm control means 17 for starting an alarm by the buzzer B.

  Here, when a fire is detected by the fire detection means 14, the wireless communication control means 16 enters a transmission state and transmits an interlock control signal including identification information stored in the setting storage means 15, while Is detected, when the interlock control signal transmitted by another fire alarm 1 is received, the identification information included in the received interlock control signal and the setting storage means 15 are stored. The coincidence with the identification information is determined, and if it coincides, the alarm control means 17 starts an interlocking alarm. Thereby, when the fire alarm device 1 detects a fire, the fire alarm device 1 can transmit an interlock control signal to cause another fire alarm device 1 to start an interlock alarm. When the interlock control signal is received, the interlock control signal can reach farther if the signal is relay-transmitted.

  The power input unit 11 may be arranged inside the main body of the fire alarm device 1 as a conversion circuit that converts AC power input from the power terminal T through the power cord into a predetermined DC voltage, and has a power terminal T. An AC adapter may be formed outside the main body and supplied with DC power from the AC adapter through a power cord. When an AC adapter is used, the backup power source 12 may be accommodated inside the AC adapter.

  In the setting storage means 15, identification information common to the fire alarm system, that is, a system ID, selection of a wireless channel used for transmission / reception of an interlock control signal, and the like are manually set and stored at the time of construction. Therefore, the setting storage unit 15 may be configured with a dip switch or the like. Based on such identification information, the fire alarm 1 can determine whether the received interlock control signal is transmitted from another fire alarm 1 belonging to the fire alarm system. In addition, the possibility of crosstalk can be reduced by selecting a radio channel different from another adjacent system.

  Next, the configuration of the interlock control signal will be described. The interlock control signal can be, for example, an FM method in which the center frequency of the selected channel is frequency-modulated by digital values “1” and “0” that constitute communication data. In this case, a well-known configuration of an FM transmitter / receiver circuit can be employed for the transmitter and receiver of the wireless communication control means 16.

  FIG. 3 is a schematic waveform diagram of the interlock control signal, and is composed of a spare signal portion P for controlling signal detection and recording synchronization, and a data portion D composed of digital data to be transmitted. Here, the spare signal portion P is composed of a pattern in which “1” and “0” are repeated a predetermined number of times. The change timing of “1” and “0” of the pattern, and the timing at which the data portion D is sampled bit by bit. By synchronizing these, it becomes possible to receive digital data correctly. Further, the data portion includes identification information for identifying the interlock control signal as digital data.

  FIG. 4 is a flowchart showing an example of the basic operation of the fire alarm 1, which is based on the premise that the identification information has already been set in the setting storage means 15. It starts from the state where it started to detect. The fire alarm device 1 is basically in a reception state, and determines whether or not a fire is detected in that state (101, 102). Here, if a fire is detected, an alarm is started, a transmission state is entered, an interlocking control signal including identification information is transmitted, and the reception state is returned (103 to 106).

  Next, it is determined whether or not the interlock control signal has been received. If it has been received, the identification signal included in the received interlock control signal and the identification information stored in the setting storage means 15 are further determined. It is determined whether or not they match (107, 108). Here, if both match, an interlocking alarm is started (109).

  Thereafter, it is determined whether an alarm stop operation has been accepted by the operation means 13 (110). Here, if the alarm stop operation is accepted, the alarm or the interlocking alarm is stopped, and the process waits until a predetermined time elapses (111, 112). If the fire is not eliminated manually during this standby, the fire will be detected again.

  Note that the idea of the interlock control signal can also be applied to an alarm stop signal. That is, when the alarm stop operation is performed, the output of the alarm or the interlocking alarm is stopped, and further, the alarm stop signal is transmitted by the wireless communication control means 16, while the alarm stop signal is received when the alarm stop signal is received. The output of the interlocking alarm may be stopped. Or, when an alarm stop operation is performed or when an interlock stop signal is received, the interlock alarm is stopped, but the alarm output by its own fire detection is not stopped, and the fire alarm is detected. The device 1 may be identified.

  FIG. 5 is a schematic timing chart showing the interlocking operation of the fire alarm system. In this figure, at time T1, for the first time, the fire alarm 1 # 1 detects a fire, starts an alarm, transmits an interlock control signal, and further outputs an interlock control signal while the fire continues. Sending intermittently. On the other hand, the fire alarm device 1 # 2 receives the first interlock control signal and starts an interlock alarm.

  At time T2, the alarm is stopped because the alarm stop operation is performed in the fire alarm device 1 # 1, and at time T3, the interlock alarm is stopped because the alarm stop operation is performed in the fire alarm device 1 # 2. Has been.

It is a block diagram which shows schematic structure of the fire alarm by this invention. It is a block diagram of the fire alarm system provided with multiple fire alarms for dwelling units. It is a schematic waveform diagram of an interlocking control signal. It is a flowchart which shows the basic operation | movement of the fire alarm by this invention. It is a timing chart which shows the interlocking operation of a fire alarm system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire alarm 11 Power supply input part 12 Backup power supply 15 Setting storage means 16 Wireless communication control means T Power supply terminal

Claims (4)

In fire alarms for dwelling units that are installed on the ceiling surface of dwelling units and detect and warn of fire,
Setting storage means for storing identification information assigned in advance to the fire alarm;
Wireless communication control means for wirelessly transmitting and receiving the interlock control signal;
Alarm control means for starting an alarm when a fire is detected,
The wireless communication control means includes
When the fire is detected, while sending an interlocking control signal including identification information stored in the setting storage means,
When the fire is not detected, the reception state is established, and when the interlock control signal is received, the identification information included in the received interlock control signal matches the identification information stored in the setting storage means. A wireless fire alarm characterized by starting an interlocking alarm by the alarm control means when it is determined and matched. In claim 1,
A power input unit having a power supply terminal connected to an external power supply;
The wireless power fire alarm is characterized in that the power input section is configured as a conversion circuit that converts the AC voltage input from the power terminal into a predetermined DC voltage. In claim 2,
The wireless fire alarm, wherein the power input unit includes a backup power source charged by the DC voltage. A fire alarm system comprising a plurality of wireless fire alarms according to any one of claims 1 to 3,
A wireless fire alarm system in which a common system ID is set as the identification information for each wireless fire alarm.

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