JP2022153942A - alarm system - Google Patents

Abstract

To provide an alarm system comprising an alarm device provided with a communication unit that operates switching two sorts of frequency allocation bands, and capable of minimizing a delay in communication operation using the respective frequency allocation bands without interfering with each other in the communication operation using the respective frequency allocation bands.SOLUTION: In an alarm system, an interlocking group is configured of a plurality of alarm devices 10. The alarm device 10 that has detected a fire and performed an alarm operation, transmits, using a first frequency allocation band, an interlocking signal to other alarm devices 10 in the group to cause them to perform alarm operations; and transmits, using a second frequency allocation band at a timing of a pause period of the interlocking signal, a signal-transfer signal to the other system device 12 to cause it to perform a signal transfer operation. The interlocking signal includes a start instruction signal transmitted multiple times while repeating a transmission period and a rest period, and a fire signal indicating that a fire has been detected. The signal-transfer signal is transmitted utilizing the rest period of the start instruction signal.SELECTED DRAWING: Figure 1

Description

The present invention relates to an alarm system that wirelessly transmits an alarm transfer signal to equipment of another system when a fire is detected by any of a plurality of alarm devices forming an interlocking group and an alarm operation is performed.

Conventionally, wireless interlocking residential fire alarms (hereinafter referred to as "alarms") form an interlocking group with a plurality of alarms, and an alarm that detects a fire and performs an alarm operation is connected to other alarms. On the other hand, by wirelessly transmitting an interlocking signal containing a fire signal indicating the detection of a fire to perform an alarm operation, a plurality of alarms are interlocked to issue a fire alarm.

In this case, the alarm device that has received the interlocking signal sends a fire reception confirmation signal indicating that the fire signal included in the interlocking signal has been received for a predetermined period of time at a predetermined timing based on the number within the interlocking group assigned to itself. (ACK) is transmitted wirelessly, and if the alarm that detects the fire receives the fire acknowledgment signal from all other alarms, the communication operation of the interlocking signal ends normally, and the alarm that cannot receive the fire acknowledgment signal If there is, the interlocking signal is retransmitted.

For example, if the end of transmission of the fire signal of the alarm that detected the fire is 0 seconds, the 1st alarm is 0 to 3 seconds, the 2nd alarm is 3 to 6 seconds, and the 3rd alarm is 0 to 3 seconds. Each alarm transmits a fire acknowledgment signal at a predetermined time determined for each alarm, such as between 6 and 9 seconds for each alarm.

For this reason, if the number of alarms forming an interlocking group increases, it will take time to complete the transmission of fire acknowledgment signals from all alarms. The transmission time of the fire reception confirmation signal and the maximum number of fire alarms in the group are determined so as to fit within a predetermined time, taking into account the case where the interlocking signal is retransmitted. For example, if the time from the detection of fire to the completion of reception of the fire reception confirmation signal is set within a predetermined time, for example, within one minute, the maximum number of alarm devices is set to, for example, 15 units.

In addition, in an alarm system that forms an interlocking group, a transfer signal is transmitted based on the fire detection of the alarm, and other system equipment, for example, a system such as a home security system installed in the same house The equipment is also designed to perform an alarm operation.

However, if the alarm device that detected the fire tries to transmit a transfer signal to other system equipment in the same frequency band as the interlocking signal, it is necessary to accommodate the time required for the communication operation of the interlocking signal with all other alarm devices. Since there is no margin for a certain predetermined time, it is not possible to secure the time for the communication operation of the shift signal with other system equipment within the predetermined time, and the other system equipment uses the same frequency band. It is difficult in terms of time to activate the alarm.

To solve this problem, the 426 MHz frequency allocation band known as RCR STD-30 is used for communication between alarms, so other frequency bands, such as Using the 920MHz frequency allocation band known as STD-T108, when a fire is detected, an interlocking signal is transmitted in the 426MHz band and a transition signal is transmitted in the 920MHz band at the same time, using two types of frequency allocation bands. By doing so, other system devices can also perform alarm operations based on fire detection without causing time delays. In addition, when using the 426 MHz band frequency allocation band known as RCR STD-30, the continuous transmission time is limited to 3 seconds. Since it is stipulated that a 2-second transmission pause time is provided after , the 3-second transmission time and the 2-second transmission pause time are repeatedly transmitted.

JP 2015-014986 A

However, in an alarm device that uses two types of frequency allocation bands, 426 MHz band and 920 MHz band, it is necessary to separately provide a communication IC that functions as a communication unit for the 426 MHz band and a communication unit that functions as a communication unit for the 920 MHz band. There is a problem that the number of components increases and the cost rises.

In addition, some alarms are battery-powered, and it is necessary to replace the battery according to the battery life, so it is desirable that the battery life is long. It is desirable to design the power supply voltage at which it is determined that the battery is dead. On the other hand, it is necessary to consider that the power supply voltage does not fall below the minimum operating voltage of the IC, etc. mounted on the alarm device in the event of an instantaneous voltage drop due to changes in current consumption, or so-called undershoot. Therefore, the power supply voltage for judging that the battery is dead must be set high in consideration of this. That is, when the voltage drop due to undershoot is large, the power supply voltage for judging that the battery is exhausted needs to be set higher by that amount, which shortens the battery life.

Therefore, in order to set the power supply voltage considering the voltage drop due to undershoot without shortening the battery life, it is necessary to suppress the voltage drop due to undershoot. Alternatively, it is conceivable to adopt a power supply IC that has a strong resistance to current changes.

However, the communication IC consumes a relatively large amount of current and has a characteristic that the current consumption increases during communication. can operate at the same time, and the amount of change in current consumption increases, making it difficult to suppress the amount of change in current consumption. In addition, when a power supply IC having a strong resistance to current changes is used, the power supply IC must be selected in the midst of strict requirements for the power supply IC. . In general, power supply ICs that are highly resistant to current changes consume more dark current inside the power supply IC than normal power supply ICs, resulting in faster battery consumption. It is unsuitable.

In order to solve the problems of cost and battery life in battery-driven alarms, it is conceivable to integrate a 426 MHz band communication section and a 920 MHz band communication section into one communication IC. Integrating the communication unit reduces the number of component parts, thereby reducing costs, and extending battery life by suppressing changes in current consumption compared to the case where the communication units are provided separately. can be done. However, if one communication IC is provided with communication units that use two types of frequency allocation bands, the communication units cannot operate simultaneously in two types of frequency allocation bands, and furthermore, transmission and reception are separated. It has to work sequentially. For this reason, one communication IC provides advantages in terms of cost and battery life, but the same problem of time remains as in the case of using the same frequency band for the interlocking signal and the transfer signal.

Even if the alarm device is provided with a communication unit (communication IC) that operates by switching between two types of frequency allocation bands, the present invention uses each frequency band without interfering with communication operations using each frequency band. It is an object of the present invention to provide an alarm system that minimizes delays in communication operations.

(alarm system)
The present invention is an alarm system in which an interlocking group is configured by a plurality of alarm devices, and an alarm that detects a fire and performs an alarm operation transmits an interlocking signal to other alarm devices belonging to the interlocking group to perform an alarm operation. and
the alarm is
A signal is transmitted and/or received by switching between the first frequency allocation band and the second frequency allocation band,
When a fire is detected, the first frequency band allocation band is used to transmit an interlocking signal to other alarm devices belonging to the interlocking group,
Transmitting a transfer signal to other system equipment that does not belong to the interlocking group using the second frequency band allocation band during the interlocking signal pause period;
It is characterized by

(Transmission of transfer signal during pause period of activation command signal)
The interlocking signal sent from the alarm is
a start-up command signal transmitted multiple times while repeating a transmission period and a rest period; a fire signal indicating that a fire has been detected, which is transmitted after the start-up command signal;
including
The transfer signal is transmitted during the pause period of the activation command signal.

(Receipt of Signal Transfer Receipt Confirmation)
The alarm device is in a reception standby state in which it is possible to receive a signal transfer reception confirmation signal from other system equipment during the period from the transmission of the signal transfer signal to the end of the pause period of the activation command signal that transmitted the signal transfer signal. do.

(Retransmission of the shift signal when the communication operation of the shift signal fails and the communication operation of the interlocking signal succeeds)
The alarm device cannot receive the notification reception confirmation signal from other system equipment in the reception standby state of the notification reception confirmation signal, and for a predetermined period after transmitting the fire signal, the fire reception confirmation signal from the other alarm device A first transfer to another system instructing transmission of a report transfer signal when a fire acknowledgment signal is received from all other alarm devices in the state of waiting for reception of the fire acknowledgment signal. Sending a request signal to a predetermined other alarm device,
A predetermined other alarm device that has received the first other system transfer request signal transmits an alarm transfer signal to the other system device.

(Retransmission of the report transfer signal and the interlocking signal when the communication operation of the report transfer signal and the interlocking signal fails)
The alarm device cannot receive the notification reception confirmation signal from other system equipment in the reception standby state of the notification reception confirmation signal, and for a predetermined period after transmitting the fire signal, the fire reception confirmation signal from the other alarm device If the fire reception confirmation signal cannot be received from any of the other alarm devices while waiting for reception of the fire reception confirmation signal, the instruction to send the interlocking signal and the alarm transfer signal will be given. Sending a second other system transfer request signal to a predetermined other alarm device whose reception of the fire reception confirmation signal has been confirmed,
Upon receiving the second other system transfer request signal, the predetermined other alarm device transmits an interlocking signal including the activation command signal and the fire signal, and transmits the alarm transfer signal to the other system device during the pause period of the activation command signal. .

(Destination of other system transfer request signal)
Based on the information transfer reception confirmation history of each alarm device that has transmitted the information transfer signal and received the information transfer reception confirmation signal from other system equipment, the alarm device
A first other system transfer request signal or a second other system transfer request signal is transmitted to another alarm device.

(Transmission of transfer signal before transmission of activation command signal)
The alarm also transmits a transition signal during the idle period before transmitting the first activation command signal.

(Communication operation using frequency allocation band of communication standard)
A communication operation using the first frequency allocation band is a communication operation using the 426 MHz band of the communication standard RCR STD-30,
A communication operation using the second frequency allocation band is a communication operation using a frequency allocation band of a communication standard different from the communication standard of the first frequency allocation band.

(Effect of alarm system)
According to the alarm system of the present invention, alarm devices belonging to an interlocking group perform communication operations by switching between a first frequency allocation band (eg 426 MHz band) and a second frequency allocation band (eg 920 MHz band). , when a fire is detected, the first frequency band allocation band is used to transmit the interlocking signal to other alarm devices belonging to the interlocking group, and the second frequency band allocation is performed during the pause period in the communication operation of the interlocking signal. Since the band is used to transmit the transfer signal to other system equipment that does not belong to the interlocking group, the alarm device switches between two types of frequency allocation bands, and even if it operates sequentially by switching between transmission and reception , the communication operation using the second frequency band can be completed during the idle period of the communication operation using the first frequency band, and the communication operation of the interlocking signal to other alarm devices belonging to the interlocking group is prevented. Also, there is no need to wait for the completion of the communication operation of the interlocking signal, and there is no delay in the communication operation of the interlocking signal and the communication operation of the transfer signal, and the transfer signal to other system equipment that does not belong to the interlocking group. It enables communication operations to be performed quickly. Here, "communication operation" means a series of communication operations for causing an alarm operation to be performed at an interlocking destination or a report transfer destination, including a transmission operation, a reception operation, and a pause operation in which neither the transmission operation nor the reception operation is performed. .

In addition, since the alarm performs communication by switching between the first frequency allocation band (for example, 426 MHz band) and the second frequency allocation band (for example, 920 MHz band), the communication unit can be operated by one communication IC. Compared to the conventional case where a communication IC functioning as a 426 MHz band communication unit and a communication IC functioning as a 920 MHz band communication unit were provided separately, the circuit configuration can be simplified and the cost can be reduced. can be reduced.

(Effect of transmission of the transfer signal during the pause period of the activation command signal)
In addition, the interlocking signal transmitted from the alarm device uses, for example, the 426 MHz band known as the communication standard RCR STD-30 as the first frequency allocation band. In accordance with the communication standard, it includes a start command signal that is transmitted multiple times while repeating a 3-second transmission period and a 2-second rest period, and a fire signal that is transmitted after the start command signal to the effect that a fire has been detected. , During the pause period of the activation command signal, as the second frequency allocation band, for example, by switching to the 920 MHz band known as the communication standard STD-T108 and transmitting the transfer signal to other system equipment, the communication operation of the interlocking signal To quickly perform a communication operation of a shift signal without being restricted by a system and without interfering with the communication operation of an interlocking signal.

(Effect of Receipt of Signal Transfer Receipt Confirmation Signal)
In addition, the alarm device that has detected a fire receives a report transfer reception confirmation signal from other system equipment during the period from when the report transfer signal is sent until the pause period of the start command signal that sent the report transfer signal ends. By setting it as a possible reception standby period, during the 2-second pause period of the activation command signal, a transfer reception confirmation signal from other system equipment that received a transfer signal using the 920 MHz band is received, and quickly It is possible to complete the communication operation of the transfer signal to other system equipment.

(Effect of retransmitting the report transfer signal when the communication operation of the report transfer signal fails and the communication operation of the interlocking signal succeeds)
In addition, the alarm device that detected the fire failed to communicate with the transfer signal using the pause period of the activation command signal (when the transfer reception confirmation signal could not be received), and succeeded in communicating with the interlocking signal. case (when fire reception confirmation signals have been received from all other alarm devices), after the communication operation of the interlock signal to the other alarm devices belonging to the interlock group has been completed normally, the first other system transfer request signal To efficiently recover from failure of communication operation of a transfer signal from an alarm device that detects a fire by requesting another alarm device to transmit the transfer signal and transmitting the transfer signal through a different communication route. enable

(Effect of resending the report transfer signal and the interlocking signal when the communication operation of the report transfer signal and the interlocking signal fails)
In addition, if the alarm device that detects the fire fails to communicate the alarm signal using the pause period of the activation command signal, and further fails to communicate the interlocking signal to other alarms belonging to the interlocking group ( If the fire acknowledgment signal could not be received from any other alarm device), the second other system transfer request signal sends the interlocking signal and In this case, as in the case of detecting a fire, the requested alarm device transmits an interlocking signal including the start command signal and the fire signal, and the pause period of the start command signal By transmitting the report transfer signal to other system equipment, it is possible to efficiently recover from the failure of the communication operation of the interlocking signal from the alarm device that detected the fire and the failure of the communication operation of the report signal.

(Effect of transmission destination of other system transfer request signal)
Further, the alarm device that detects the fire transmits a transfer signal and receives a transfer reception confirmation signal from other system equipment, for example, sharing and storing the transfer reception confirmation history of each alarm device. By transmitting a first or second transfer request signal to another system to another alarm device in which the latest transfer reception confirmation history is stored, the communication operation of the transfer signal to the other system device in the past To efficiently recover the communication operation of a transfer signal or the communication operation of an interlocking signal and a transfer signal failed by an alarm device that has detected a fire by requesting another alarm device that has successfully detected a fire.

(Effect of transmission of the transfer signal before transmission of the activation command signal)
In addition, the alarm device that detects a fire also transmits a transfer signal during the pause period before sending the first start command signal, thereby increasing the chances of transmitting the transfer signal and ensuring the success of the communication operation of the transfer signal. By increasing the rate, it is possible to reinforce the communication operation of the transfer signal, and if the communication operation of the transfer signal succeeds during the rest period before the transmission of the start command signal, the transfer to other system equipment can be performed early. Allows signal communication operations to complete.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which showed the outline of the alarm system of this invention. Fig. 2 is a block diagram illustrating an embodiment of an alarm; It is the time chart which showed the case where the communication operation|movement of an interlocking signal and a report transfer signal was performed normally. It is the time chart which showed the retransmission operation|movement of a report-shift signal when communication operation|movement of a report-shift signal fails and communication operation|movement of an interlocking signal succeeds. It is the time chart which showed the retransmission operation|movement of a report transfer signal and an interlocking signal when the communication operation|movement of a report transfer signal and an interlocking signal fails. FIG. 6 is an explanatory diagram of a time chart showing a retransmission operation following FIG. 5;

An embodiment of an alarm system according to the present invention will be described in detail below with reference to the drawings. In addition, the present invention is not limited by the following embodiments.

[Basic concept of the embodiment]
First, the basic concept of the embodiment will be explained. In the embodiment, roughly, an interlocking group is configured by a plurality of alarm devices, and an alarm that detects a fire and performs an alarm operation transmits an interlocking signal to other alarm devices belonging to the interlocking group to perform an alarm operation. The present invention relates to an alarm system that causes an alarm operation to be performed by transmitting an alarm transfer signal to other system equipment that does not belong to an interlocking group.

Here, the "alarm device" is installed in a general house or a group home, and detects a fire and performs an alarm operation. It is the one that performs the action. A "interlocking group" is composed of a plurality of alarm devices, and each alarm device has information for configuring the interlocking group, such as a group number and alarm devices of itself and other alarm devices. A number is registered (stored) in advance, and an interlocking signal containing a fire signal indicating that a fire has been detected is sent including the group number and its own alarm number, and other alarms are in the group included in the interlocking signal. By comparing the number and the alarm device number of the transmission source with the registered group number and alarm device number, it is identified that the interlocking signal is from the alarm device belonging to its own group, and the fire alarm operation is performed. The group number is a concept including group identification information such as group address, group code, and group code, and the alarm number includes alarm identification information such as alarm address, alarm code, and alarm code. It is a concept.

In addition, "other system equipment" refers to other systems that do not belong to the interlocking group of alarms that detect and warn fires, such as home security systems installed in the same house, and It receives a transfer signal transmitted from the detected alarm device and performs a fire alarm operation. A "report signal" is a signal indicating that a fire has been detected, which is transmitted from an alarm device that has detected a fire to other system equipment, and is a signal that can be received by the other system equipment.

In such an alarm system, the alarm transmits and/or receives signals by switching between the first frequency allocation band and the second frequency allocation band, and when a fire is detected, the first frequency Using the band allocation band, the interlocking signal is transmitted to other alarm devices belonging to the interlocking group, and the second frequency band allocation band is used to transfer to other system equipment that does not belong to the interlocking group while the interlocking signal is inactive. It transmits information signals.

Here, the "first frequency allocation band" is, for example, a frequency allocation band of 426 MHz band known as communication standard RCR STD-30. As a restriction of the communication standard RCR STD-30, before an alarm that has detected a fire transmits a fire signal indicating that a fire has been detected, other alarms must be ready to receive the fire signal. , to transmit a start command signal, and the start command signal is transmitted a plurality of times while repeating a 3-second transmission and a 2-second pause when using the communication standard RCR STD-30.

The activation command signal consists of a preamble code of about 2.5 seconds for receiving the signal to other alarm devices in the intermittent reception state, which is in the reception state at predetermined intervals, and continuous reception to command to enter the reception preparation state. A signal containing an instruction. By transmitting the activation command signal multiple times while repeating transmission of 3 seconds and pause of 2 seconds, regardless of the timing relationship between the transmission pause period of the activation instruction and the period of the intermittent reception state, the signal can be transmitted multiple times. The intermittent reception state of the alarm device is set to the reception state by one of the activation command signals.

The fire signal, more specifically, has a preamble code shorter than that of the activation command signal, for example 0.5 seconds, in order to receive the signal to other alarms ready to receive the signal continuously, and It is a signal including information indicating that a fire has been detected, and the transmission time is 3 seconds or less.

Further, the “second frequency allocation band” is, for example, a frequency allocation band of 920 MHz band known as communication standard STD-T108, which is a frequency allocation band of a communication standard different from the communication standard of the first frequency allocation band. is. Communication standard STD-T108 uses a carrier sense method that checks that other stations are not transmitting radio waves in the 920 MHz band before transmitting a signal, so transmission of a start command signal is unnecessary. Become.

In addition, "transmitting or receiving a signal by switching between the first frequency allocation band and the second frequency allocation band" means switching between two types of frequency allocation bands and switching between transmission and reception of signals in the selected frequency allocation band. It means to switch by setting the status (state), for example, and as an example of the status,
426 MHz (first frequency allocation band) transmission status 426 MHz (first frequency allocation band) reception status 920 MHz (second frequency allocation band) transmission status 920 MHz (second frequency allocation band) reception status It is to be switched, and the operation of the unswitched status cannot be performed.

For example, when the status is switched to 426 MHz transmission status, transmission can be performed using the 426 MHz band but reception cannot be performed, and neither transmission nor reception can be performed using the 920 MHz band. This makes it possible to realize communication operations using two types of frequency allocation bands, 426 MHz band and 920 MHz band, with one communication IC functioning as a single communication unit.

The status can be set arbitrarily, but is set by commands, for example, 426 MHz transmission command, 426 MHz reception command, 920 MHz transmission command, and 920 MHz reception command are used.

In addition, the alarm device that has detected a fire transmits an interlocking signal using the first frequency allocation band, and this interlocking signal is transmitted multiple times while repeating, for example, the transmission period T1 and the pause period T2. It includes a start command signal and a fire signal indicating that a fire has been detected that is transmitted after the start command signal, and the transfer signal using the second frequency allocation band is, for example, the start command signal of the interlock signal. It is sent during idle periods.

Here, the report transfer signal is transmitted during, for example, the first predetermined period within the pause period of the activation command signal, and the report transfer signal is received from other system equipment during the period from the transmission of the report transfer signal to the end of the pause period. It will be in a reception standby state where it is possible to receive an acknowledgment signal (ACK), and if a transfer reception confirmation signal is received in this state, the communication operation of the transfer signal will be completed normally, and the interlocking signal including the fire signal will be sent to other alarm devices. It is possible to complete the communication operation of the report transfer signal before the communication operation of receiving the fire reception response signal after transmission is normally completed.

In addition, if the alarm device that detected the fire does not receive the transfer confirmation signal in response to the transfer signal transmitted during the pause period of the start command signal, the communication operation of the transfer signal has failed, so the transfer signal will not be sent. It performs a retransmission operation.

The retransmission operation of this embodiment is divided into a case where the communication operation of the shift signal fails and the communication of the interlocking signal succeeds, and a case where the communication operations of the shift signal and the interlocking signal fail. In addition, the "interlocking signal communication operation" is a reception standby state in which fire reception confirmation signals from other alarms can be received for a predetermined period after the fire signal is transmitted, and all other alarms are received in the reception standby state. If a fire acknowledgment signal is received from one of the alarm devices, it is assumed that the communication operation of the interlocking signal is successful because all the other alarm devices are in a state to activate the alarm operation. If the signal cannot be received, the interlocking signal communication operation fails because there is an alarm device that cannot perform the alarm operation. In addition, the "communication operation of the shift signal" is a reception standby state in which a shift reception confirmation signal from other system equipment can be received until the rest period after transmitting the shift signal is completed. If a signal transfer reception confirmation signal is received from other system equipment in the state, the other system equipment will be in a state to perform an alarm operation, so the communication operation of the transfer signal will be successful. If the signal cannot be received, it means that the communication operation of the transfer signal fails because the alarm operation cannot be performed by other system equipment.

If the communication operation of the interlocking signal fails with the alarm device that detected the fire, and the communication operation of the interlocking signal succeeds, after the communication operation of the interlocking signal is completed, the instruction to transmit the interlocking signal will be sent. 1 other system transfer request signal is transmitted to a predetermined other alarm device, the other alarm device transmits a report transfer signal to the other system equipment, and the recovery operation is performed by retransmitting the report transfer signal.

On the other hand, if the communication operation of the interlocking signal and the interlocking signal fails in the alarm device that detected the fire, the second instruction is to instruct the transmission of the interlocking signal and the interlocking signal after the communication operation of the interlocking signal is completed. The other system transfer request signal is transmitted to a predetermined other alarm device that has successfully received the fire reception confirmation signal, and the other alarm device that has received the second other system transfer request signal sends the start command signal. It transmits an interlocking signal including a fire signal, transmits an alarm transfer signal to other system equipment during a pause period of the start command signal, and performs a recovery operation by retransmitting the alarm transfer signal and the interlocking signal.

In addition, the alarm devices share and store, for example, among the alarm devices, the history of the reception confirmation of the reception of each alarm device that has transmitted the transmission signal and received the reception confirmation signal of the reception from the other system equipment. If the communication operation of the alarm signal fails, or if the communication operation of the transfer signal and the interlocking signal fails, the first or second alarm is sent to other alarm devices based on the latest transfer reception confirmation history. By transmitting the other system transfer request signal, the degree (probability) of successful communication operation by retransmission is improved.

In addition, the alarm device that detects a fire transmits a transfer signal even during the idle period before sending the first start command signal, further improving the degree (probability) of successful communication operation of the transfer signal. It makes it possible to

Specific embodiments will be described below. In the specific embodiments shown below, the "first frequency allocation band" is the "426 MHz band according to the communication standard RCR STD-30", and the "second frequency allocation band" is the "communication standard STD-T108 920 MHz band according to .

[Specific contents of the embodiment]
The alarm system will now be described in more detail. The contents will be described separately as follows.

a. alarm system b. alarm b1. Configuration of alarm b2. Fire control unit 40
b3. Report transfer control unit 42
b4. Retransmission of transfer signal b5. Retransmission when the communication operation of the shift signal fails and the communication operation of the interlocking signal succeeds b6. retransmission when the communication operation of the transfer signal and the interlocking signal fails c. Communication unit 16
c1.426MHz transmitter 48
c2.426MHz receiver 50
c3.920MHz transmitter 52
c4.920MHz receiver 54
c5. antenna 62
c6. Communication control unit 46
d. Communication control of alarm system d1. Communication control when the communication operation of the transfer signal and the interlocking signal is successful d2. Communication control when the communication operation of the shift signal fails and the communication operation of the interlocking signal succeeds d3. Communication control when the communication operation of the transfer signal and the interlocking signal fails

[a. alarm system]
The alarm system will now be described in more detail. The alarm system of the present embodiment is, for example, installed in a house to monitor fires, and installation in the house is optional. For example, as shown in FIG. Alarm devices 10 (10-1) to 10 (10-4) are installed in each room such as a master bedroom and a child's room to detect a fire and perform an alarm operation.

Alarm devices 10 (10-1) to 10 (10-4) form an interlocking group. The interlocking group registers a unique group number and alarm device number to the alarm devices 10 (10-1) to 10 (10-4), and also registers the alarm devices 10 (10-1) to 10 (10-4). stores group management information in which alarm device numbers of other alarm devices belonging to its own group are registered. The maximum number of alarm devices forming an interlocking group is determined, for example, the maximum number is 15 units.

Taking the alarm device 10 (10-1) as an example, when a fire is detected, a predetermined voice message is output and an indicator lamp is operated to perform an alarm operation indicating that a fire has occurred, and other alarm devices. , an interlocking signal including a fire signal indicating that a fire has been detected is transmitted to cause the fire alarm operation to be performed.

The interlocking signal transmitted by the alarm device 10 (10-1) uses the 426 Hz band of the communication standard RCR STD-30 as the first frequency allocation band, and follows the activation command signal that repeats 3 seconds transmission and 2 seconds rest. A fire signal is sent to indicate that a fire has been detected, and the fire signal contains the group number and its own alarm number.

Other alarm devices that receive the interlocking signal from the alarm device 10 (10-1), for example, the alarm device 10 (10-2) receive a predetermined reception for enabling reception of the fire signal by receiving the activation command signal. Perform preparatory operations, such as demodulation frequency pull-in operations, then compare the group number and alarm number included in the received fire signal with the registered contents of the group management information, and if a match is obtained, the received fire The signal is validated and the fire alarm is activated. The same applies to the other alarm devices 10(10-3) to 10(10-4).

System devices other than the alarm system are installed as other system devices 12 in a house 11 in which the alarm devices 10 (10-1) to 10 (10-4) constituting the interlocking group are installed. The other system equipment 12 is arbitrary, but for example, when a home security system for monitoring crime prevention of the house 11 is installed, the other system equipment 12 includes a monitoring device and a repeater of the home security system. .

Other system equipment 12 such as a home security system performs wireless communication with a crime prevention sensor (not shown) using a second frequency allocation band different from that of the alarm system. The wireless communication of the other system equipment 12 uses, for example, the 920 MHz band of communication standard STD-T108 as the second frequency allocation band.

When the alarm devices 10 (10-1) to 10 (10-4) of the alarm system detect a fire, they use the 920 MHz band to transmit an alarm signal to the other system equipment 12 to perform an alarm operation. The shift signal is transmitted during the pause period of the activation command signal of the 426 MHz band interlocking signal.

[b. alarm]
(b1. Alarm configuration)
The alarm will be explained in more detail. FIG. 2 is a block diagram showing a specific embodiment of an alarm. As shown in FIG. 2, the alarm device 10 (10-1) detects a fire and transmits an interlocking signal including a start command signal and a fire signal to other alarm devices and a transfer signal to other system equipment 12. Although the function and configuration of the transmission are arbitrary, the control processor 14 and the communication unit 16 are configured, for example.

The control processor 14 is provided with a CPU 18 , and a control logic 20 , a ROM 22 and a RAM 24 are connected to a bus 26 from the CPU 18 . The control logic 26 implements various hardware functions such as bus control associated with the control processing of the CPU 18 . Connected to the bus 26 are a communication unit 16, a smoke detection unit 28, a test switch 30, an indicator lamp 32, a speaker 34, a registration switch 36, and a non-volatile memory 38 provided outside the control processor 14. FIG.

The smoke detection unit 28 has a known scattered light type smoke detection structure, intermittently drives a light emitting unit using an infrared LED to emit light at a predetermined cycle, and detects a light reception signal of scattered light received by a light receiving unit such as a photodiode. is amplified to output a smoke density detection signal. A temperature detection unit may be provided instead of the smoke detection unit 28, and the temperature detection unit uses, for example, a thermistor as a temperature detection element. Outputs a detection signal.

When the test switch 30 is operated while no fire is detected, a predetermined test operation is performed and a predetermined test message is output from the speaker 34. - 特許庁Also, the test switch 34 functions as an alarm stop switch during the fire alarm output. The indicator lamp 32 uses an LED, and lights up when the alarm device itself detects a fire, and flashes or flickers when an interlocking signal including a fire signal is received from another alarm device. The registration switch 36 generates group management information 44 in which the group number and the alarm device numbers of other alarm devices are registered by a predetermined registration operation, and stores the group management information 44 in the nonvolatile memory 38 .

The communication unit 16 is connected to the antenna 62 and uses the 426 MHz band to communicate interlocking signals including fire signals with the other alarm devices 10(10-2) to 10(10-4). Also, the communication unit 16 performs a communication operation of the transfer signal with the other system equipment 12 using the 920 MHz band. Also, the communication unit 16 can be configured as one communication IC, and the communication IC is a concept including a communication module, a communication modem, and the like.

The CPU 18 is provided with the functions of a fire control section 40 and an alarm transfer control section 42 which are implemented by executing programs stored in the ROM 22 .

(b2. Fire control unit 40)
The fire control section 40 will be described in more detail. The fire control unit 40 reads the smoke concentration detection signal output from the smoke detection unit 28 after A/D conversion, detects a fire when the smoke concentration is equal to or higher than a predetermined threshold value, and indicates that a fire has been detected. Control to output fire alarm.

In addition, when the fire alarm operation is performed, the fire control unit 40 instructs the communication unit 16 to generate an interlocking signal including a start command signal and a fire signal indicating that a fire has been detected, and uses the 426 MHz band. Controls transmission to other alarm devices. Here, the fire signal includes a group number and its own alarm number.

In addition, the fire control unit 40 is in a reception standby state in which a fire reception confirmation signal can be received from another alarm device for a predetermined time T3 starting from the end of transmission of the fire signal. If the fire acknowledgment signal can be received from all the alarms, the communication operation of the interlocking signal is successful, so the operation is terminated normally. Since communication operation of the fire signal has failed, control is performed to retransmit the interlocking signal.

In addition, when the communication unit 16 receives an interlocking signal transmitted by another alarm belonging to the interlocking group, the fire control unit 40 controls to output a fire alarm indicating that the other alarm has detected a fire. In addition, during a predetermined time T3 starting from the end of transmission of the fire signal of the other alarm, at the timing of its own turn determined according to the alarm number, for example, the group number and the number of the alarm that detected the fire. Control is performed to transmit a fire reception confirmation signal indicating that the reception of the fire signal including is confirmed for a predetermined period of time.

In addition, the fire control unit 40 performs alarm stop control by operating the test switch 30 and fire restoration control in which the smoke density of the smoke detection unit 28 is reduced to a threshold value or less in the same manner as in the case of the interlocking signal including the fire signal. 16 transmits an interlocking signal including an alarm stop signal indicating alarm stop and an interlocking signal including a fire restoration signal indicating fire restoration.

(b3. Report transfer control unit 42)
The information transfer control unit 42 will be described in more detail. When a fire is detected by the fire control unit 40, the alarm transfer control unit 42 sets the transmission period of T1=3 seconds and the pause period of T2=2 seconds included in the interlocking signal transmitted using the 426 MHz band. At the timing of the pause period T2 of the repeated activation command signal, control is performed to transmit to the other system equipment 12 a report transfer signal indicating that a fire report is to be transferred using the 920 MHz band.

In addition, the report transfer control unit 42 can receive a report transfer reception confirmation signal (ACK) from the other system device 12 from the end of the transmission of the report transfer signal to the end of the pause period of the activation command signal. In the reception standby state, if the transfer signal reception confirmation signal can be received in this reception standby condition, the communication operation of the transfer signal has been successful, so it is assumed to be a normal end. Since communication operation of the shift signal has failed, control is performed to retransmit the shift signal.

(b4. Retransmission of transfer signal)
The retransmission control unit 42 performs retransmission control when the communication operation of the report transfer signal fails. Different retransmission control is performed depending on whether both communication operations of the interlocking signal have failed.

(b5. Retransmission when the communication operation of the transfer signal fails and the communication operation of the interlocking signal succeeds)
If the communication operation of the alarm transfer signal fails, or if the communication operation of the interlocking signal is successful in the fire control unit 40, the alarm transfer control unit 42 uses the 426 MHz band to activate another predetermined alarm device. A transmission destination is specified, and control is performed to transmit a first transfer request signal to another system to instruct transmission of a transfer signal, and the request destination alarm device is caused to transmit a transfer signal using the 920 MHz band. let it take control.

(b6. Retransmission when the communication operation of the transfer signal and interlocking signal fails)
If the communication operation of the report transfer signal fails and the fire control unit 40 also fails in the communication operation of the interlocking signal, the report transfer control unit 42 uses the 426 MHz band to receive the fire reception confirmation signal. Control is performed to transmit a second other-system transfer request signal instructing transmission of an alarm transfer signal and an interlocking signal by designating another normally functioning alarm device as a transmission destination.

The fire control unit 40 and the alarm transfer control unit 42 of the alarm that received the second other system transfer request signal generate an interlocking signal including a start command signal and a fire signal using the 426 MHz band, as in the case of detecting a fire. is transmitted to other alarm devices, and during a predetermined time T3, control is performed to make it a reception standby state in which the fire reception confirmation signal can be received, and during the pause period T2 of the start command signal, the 920 MHz band is used to transfer information. A signal is transmitted, and then control is performed to put the mobile terminal in a reception standby state in which it is possible to receive a reception acknowledgment signal.

Here, the alarm device to which the first other system transfer request signal or the second other system transfer request signal is requested is arbitrary. ), when the communication operation of the report transfer signal to the other system equipment 12 is successful, the report transfer reception confirmation history is generated and stored in the non-volatile memory 34, and the alarm devices 10 (10-1) to 10 In (10-4), if the transfer reception confirmation history is shared and the first or second other system transfer request signal is transmitted, another alarm device with the latest transfer reception confirmation history is specified. to send. This can increase the chances of a successful communication operation of the transfer signal and/or the fire signal.

[c. communication unit 16]
The communication unit 16 will be explained in more detail. The communication unit 16 activates the communication operation of transmission or reception using the 426 MHz band according to the communication standard RCR STD-30 and the communication operation of transmission or reception using the 920 MHz band according to the communication standard STD-T108 from the control processor 14. It is performed based on the communication control instruction (status command) of the interlocking signal and the transfer signal including the command signal and the fire signal, and its function and configuration are arbitrary, but for example, as shown in FIG. Unit 46, 462 MHz transmission unit 48, 462 MHz reception unit 50, 920 MHz transmission unit 52, 920 MHz reception unit 54, switching unit 56 for switching transmission and reception of 462 MHz band, switching unit 58 for switching transmission and reception of 920 MHz band, and frequencies of 426 MHz band and 920 MHz band It is composed of a switching section 60 for switching the allocated band, and an antenna 62 is connected to the switching section 60 .

The communication speed of fire signals using the 426 MHz band is arbitrary, but is set to 2400 bps, and the communication speed of alarm signals using the 920 MHz band is also arbitrary, but is set to, for example, 9600 bps. Therefore, when transmitting a signal of the same bit length, the communication time in the 920 MHz band is 1/4 of the transmission time in the 426 MHz band.

(c1.426MHz transmitter 48)
The 426 MHz transmitter 48 will now be described in more detail. The 426 MHz transmitter 48 performs, for example, FSK modulation (frequency shift keying modulation) on a 426 MHz band carrier signal using a transmission signal input as a bit stream, and transmits signal radio waves from an antenna 62 . The 426 MHz transmission unit 48 has an antenna power of 10 mW or less in accordance with the communication standard RCR STD-30, and a predetermined channel frequency in the frequency band of 426.2500 MHz or more and 426.8375 MHz or less as the frequency allocation of the 426 MHz band. wireless transmission without carrier sense. In addition, the 426 MHz transmission unit 48 repeats a transmission period of T1=3 seconds and a pause period of T2=2 seconds according to the communication standard RCR STD-30 for transmission of continuous signals.

(c2.426MHz receiver 50)
The 426 MHz receiver 50 will be described in more detail. The 426 MHz receiver 50 receives radio waves in the 426 MHz band through the antenna 62, performs FSK demodulation, and further performs bit determination to generate a generated bit stream and outputs it as a received signal. The 426 MHz receiver 50 performs intermittent reception, and the intermittent reception operation is enabled by setting a predetermined intermittent reception cycle, for example, a predetermined receivable time every 10 seconds, for example, a receivable time of several milliseconds. Carrier sensing of radio waves in the 426 MHz band is performed, and when a reception level exceeding a predetermined threshold value is obtained by carrier sensing, the receiving operation is continued to receive radio signals in the 426 MHz band.

(c3.920 MHz transmission unit 52)
The 920 MHz transmitter 52 will be described in more detail. The 920 MHz transmission unit 52 performs, for example, FSK modulation on a 920 MHz band carrier signal using a transmission signal input as a bit stream, and transmits signal radio waves from an antenna 62 . In addition, the 920 MHz transmission unit 52 conforms to the communication standard STD-T108 for the 920 MHz band, has an antenna power of 250 mW or less, and uses radio waves of a predetermined channel frequency in the frequency band of 916 MHz or more and 928 MHz or less. Wireless transmission is performed based on the sense.

(c4.920 MHz receiver 54)
The 920 MHz receiver 54 will be described in more detail. The 920 MHz receiver 54 receives radio waves in the 920 MHz band through the antenna 62, performs FSK demodulation, further performs bit determination, and outputs a generated bit stream as a received signal. In addition, the 920 MHz receiving unit 54 performs intermittent reception, and the intermittent reception operation is enabled by setting a predetermined intermittent reception cycle, for example, a predetermined receivable time every 10 seconds, for example, a receivable time of several milliseconds. A carrier sense of radio waves in the band is performed, and when a reception level exceeding a predetermined threshold value is obtained by the carrier sense, the receiving operation is continued to receive radio signals in the 920 MHz band.

(c5. Antenna 62)
Antenna 62 will now be described in more detail. Although the antenna 62 is arbitrary, for example, a single pole antenna is used, and the antenna length is such that both the 426 MHz band and the 920 MHz band can be used. That is, the antenna length L of the antenna 62 is set to a length close to 1/4 wavelength of 426 MHz and 5/8 wavelength of 920 MHz. Specifically, the antenna length of 1/4 wavelength in the 426 MHz band is 17.6 cm, and the antenna length of 5/8 wavelength in the 926 MHz band is 20.4 cm. 17.6 cm. Also, the actual antenna length is determined in consideration of the shortening rate.

(c6. Communication control unit 46)
The communication control unit 46 will be explained in more detail. The communication control unit 46 is based on a communication control instruction from the fire control unit 40 or the report transfer control unit 42 provided in the CPU 18 of the control processor 14, specifically based on the status command, and interlocks the start command signal and the fire signal. Controls transmission operations of signals, transfer signals, first other system transfer request signals, second other system transfer request signals, etc., and reception operation of signals associated with transmission operations and reception confirmation signals for interlocking signals, etc. is to control

Here, the status command instructed from the fire control unit 40 or the report transfer control unit 42 to the communication control unit 46 is arbitrary. and

When the communication control unit 46 receives the 426 MHz transmission command, it operates the 426 MHz transmission unit 48, switches the switching units 56 and 60 to connect the antenna 62 to the output of the 426 MHz transmission unit 48, modulates the instructed signal, and transmits the signal. send radio waves.

Further, when the communication control unit 46 receives the 426 MHz reception command, it operates the 426 MHz reception unit 50, switches the switching units 56 and 60, connects the antenna 62 to the input of the 426 MHz reception unit 50, and demodulates the received radio signal. .

For example, taking the transmission of an interlocking signal containing a start command signal and a fire signal as an example, the fire control unit 40 sends a 426 MHz transmission command to the communication control unit 46 at the start of transmission of the start command signal, and the transmission period T1=3 seconds. When , a termination command is sent to the communication control unit 46, and when the pause period T2=2 seconds has passed, a 426 MHz transmission command is sent to the communication control unit 46 again, and this is repeated.

Further, when the transmission of the activation command signal is completed, the fire control section 40 sends a 426 MHz transmission command to the communication control section 46 at the start of transmission of the fire signal to cause it to transmit the fire signal. When the transmission of the fire signal ends, the fire control unit 40 sends a 426 MHz reception command to the communication control unit 46 to enable reception of fire reception confirmation signals from other alarm devices, and after a predetermined time T3 has passed, sends an end command. to stop the reception operation.

Further, when the communication control unit 46 receives the 920 MHz transmission command, it operates the 920 MHz transmission unit 52, switches the switching units 58 and 60 to connect the antenna 62 to the output of the 920 MHz transmission unit 52, and modulates the instructed signal. to transmit signal waves. Further, when the communication control unit 46 receives the 920 MHz reception command, it operates the 920 MHz reception unit 54, switches the switching units 58 and 60, connects the antenna 62 to the input of the 920 MHz reception unit 54, and demodulates the received radio signal. .

For example, when transmitting a report transfer signal to the other system device 12, the report transfer control unit 42 sends a 920 MHz transmission command to the communication control unit 46 at the transmission start timing of the report transfer signal during the pause period T2 in the activation command signal of the interlocking signal. to transmit a signal to move to. The transmission time in this case is about 100 ms, for example. When the pause period of the activation command signal of the interlocking signal ends, the end command is sent to stop the receiving operation.

[d. Communication control of alarm system]
3 to 6 for the communication operation of the interlocking signal of the alarm devices 10 (10-1) to 10 (10-4) provided in the alarm system and the communication operation of the transfer signal to the other system equipment 12. will be described in more detail.

(d1. Communication control when the communication operation of the transfer signal and the interlocking signal is successful)
FIG. 3 shows that the alarm 10 (10-1) detects a fire, successfully communicates the fire signal to the other alarms 10 (10-2) to 10 (10-4), and the other system The time chart shows a case where the communication operation of the report transfer signal to the device 12 is also successful and the operation is normally terminated.

In FIG. 3, assuming that the alarm device 10 (10-1) detects a fire at time t0, at time t1 of the rest period prior to time t2 when transmission of the activation command signal in the interlocking signal is started, the 920 MHz band shift occurs. A notification signal is sent to the other system equipment 12 . The transmission period of this signal transfer signal is about 100 ms. Subsequently, the alarm device 10 (10-1) can receive the report transfer reception acknowledgment signal ACK1 from the other system device 12 from the end of the transmission of the report transfer signal to the time t2 when the transmission of the activation command signal is started. However, in this example, the other system device 12 does not transmit a message transfer reception acknowledgment signal.

Subsequently, the alarm device 10 (10-1) repeats transmission of the activation command signal PA in the 426 MHz band three times with the transmission period T1=3 seconds and the idle period T2=2 seconds from the time t2, and transmits the activation command signal. At time t4 when the pause period ends, the fire signal FR in the 426 MHz band is transmitted for a predetermined period of time.

In addition, the alarm device 10 (10-1) transmits a 920 MHz band shift signal at the start timing of the pause period T2 of the activation command signal PA from time t3, and the pause period ends from the end of transmission of the shift signal. Until then, it is in a reception standby state in which it is possible to receive the transfer reception acknowledgment signal ACK1 from the other system equipment 12. At this time, since the other system device 12 normally receives the report transfer signal, it transmits a report transfer reception confirmation signal ACK1. It is determined that the communication operation is successful and ends normally, and the transfer signal is not transmitted during the pause period of the activation command signal PA thereafter.

When the transmission of the fire signal FR from the alarm device 10 (10-1) ends at time t5, the other alarm devices 10 (10-2) to 10 (10-4) for a predetermined time T3 until time t6 In this case, all of the other alarms 10 (10-2) to 10 (10-4) sequentially transmit the fire acknowledgment signal ACK2. When the alarm device 10 (10-1) receives this, it determines that the communication operation of the interlocking signal has succeeded, and terminates normally.

(d2. Communication control when the communication operation of the shift signal fails and the communication operation of the interlocking signal ends normally)
FIG. 4 shows communication control when the alarm device 10 (10-1) that has detected a fire has failed in the communication operation of the alarm transfer signal to the other system equipment 12, but has succeeded in the communication operation of the interlocking signal to the other alarm devices. is a time chart showing

As in the case of FIG. 3, the alarm device 10 (10-1) transmits the report transfer signal to the other system equipment 12 at times t1 and t3 in FIG. (ACK1) has not been transmitted, and the alarm device 10 (10-1) has transmitted the signal transfer signal to the other system equipment 12 even during the pause period of the start command signal PA after this, but the other system equipment 12 has not transmitted a signal transfer acknowledgment signal (ACK1), and the communication operation of the signal transfer signal has failed.

On the other hand, the fire signal FR transmitted by the alarm device 10 (10-1) at time t4 is in a state of waiting for reception of the fire reception acknowledgment signal ACK2 for a predetermined time T3. As shown at times t5 to t6 in FIG. 3, all the other alarm devices 10(10-2) to 10(10-4) are transmitting the fire acknowledgment signal ACK2 in order, and the interlocking signal is communicated. The operation was successful and completed normally.

Therefore, in order to recover the communication operation of the failed report transfer signal, at time t7 after the reception standby state enabling the reception of the fire reception confirmation signal ACK2 ends at time t6, the alarm device 10 (10-1) is turned off. For example, the alarm device 10 (10-2) is designated, and the first other system transfer request signal RQ1 instructing the transmission of the report transfer signal is transmitted. The alarm device 10 (10-2) that has received this first other system transfer request signal RQ1 transmits a 920 MHz band transfer signal at time t8, and the other system device 12 that receives this transfers the signal at time t9. After transmitting the reception confirmation signal ACK1, the communication operation of the retransmitted report signal is successful and completed at time t10, and the communication operation of the failed report signal is recovered by retransmission.

(d3. Communication control when the communication operation of the transfer signal and the interlocking signal fails)
FIGS. 5 and 6 are time charts showing communication control when the alarm device 10 (10-1) that has detected a fire has failed in the communication operation of the alarm transfer signal and further in the communication operation of the interlocking signal. be.

Until time t5 in FIG. 5, it is the same as in FIG. No acknowledgment signal (ACK1) is transmitted, and the communication operation of the transfer signal has failed.

Further, in response to the fire signal transmitted at time t4, the alarm device 10 (10-3) does not transmit the fire acknowledgment signal in a reception standby state in which it is possible to receive the fire acknowledgment signal ACK2 for the predetermined period T3. 64, and the communication operation of the interlocking signal has also failed.

Therefore, as shown at time t6 in FIG. 6, the alarm device 10 (10-1) that has detected the fire transmits the second other system transfer request signal RQ2 for instructing the transmission of the interlocking signal and the alarm transfer signal. The other alarm device that has transmitted the fire acknowledgment signal ACK2, for example, the alarm device 10 (10-2) is specified and transmitted. The alarm device 10 (10-2) that has received the second other system transfer request signal RQ2 repeats the transmission of the 426 MHz band activation command signal PA and pause in the same manner as when the fire was detected from time t7. The fire signal FR is transmitted, and the 920 MHz band transition signal is transmitted at times t8 and t9, for example, at times t8 and t9 when the pause period before starting the transmission of the activation command signal PA and the pause period T2 of the activation command signal start. . In this case, the other system device 12 transmits a transfer signal reception acknowledgment signal ACK1 in response to the transfer signal transmitted at time t9, thereby successfully communicating the transfer signal.

In addition, in response to the fire signal FR transmitted at time t11, the alarm device 10 (10-3), which was 64 in the previous non-response at time t12, transmits the fire acknowledgment signal ACK2, and the communication operation of the interlocking signal is also successful. Thus, the failed communication operation of the transfer signal and the interlocking signal is recovered by retransmission.

As for the failure of the communication operation of the shift signal and the failure of the communication operation of the shift signal and the interlocking signal, the retransmission is repeated a predetermined number of times. , retransmission may be stopped and a failure such as a communication error may be displayed.

[e. Modification of the present invention]
(First frequency allocation band and second frequency allocation band)
In the above embodiment, the 920 MHz band of the communication standard STD-T108 is taken as an example as the second frequency allocation band, but it is not limited to this and is arbitrary, and the communication standard as the first frequency allocation band If it is possible to complete the communication operation of the transfer signal to other system equipment during the pause period of the activation command signal in RCR STD-30, it includes using a frequency allocation band according to an appropriate communication standard. For example, the 2.4 GHz band of communication standard ARIB STD-T66, the 2.4 GHz band of communication standard RCR STD-33, and the 5 GHz band of communication standard ARIB STD-T70 to 72 are used as the second frequency allocation band. good too.

(parent-child method)
In the above embodiment, when a plurality of alarm devices are installed in a house to form an interlocking group, each alarm device communicates with the parent device without distinguishing between the parent device and the child device. Multiple handsets are provided to form an interlocking group, and the master and slaves use the 426MHz band to communicate with each other within the group, and use the 920MHz band to transmit a transfer signal to other system devices. You may make it have the function to carry out.

(alarm)
In the above embodiment, a wireless alarm that detects and warns a fire is taken as an example. The same can be applied to an alarm system in which crime prevention alarms are arranged and a system including these alarms in combination.

In the above embodiment, the sensor unit and the alarm output processing unit are provided integrally in the wireless alarm device, but in another embodiment, the sensor unit and the alarm output processing unit are separated It may be a wireless alarm device.

(others)
Moreover, the present invention is not limited to the above-described embodiments, includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above-described embodiments.

10 (10-1) to 10 (10-4): alarm 11: house 12: other system equipment 14: control processor 16: communication unit 18: CPU
20: Control logic 22: ROM
24: RAM
26: Bus 28: Smoke detection unit 30: Test switch 32: Indicator light 34: Speaker 36: Registration switch 38: Non-volatile memory 40: Fire control unit 42: Report transfer control unit 44: Group management information 46: Communication control unit 48: 426 MHz transmission unit 50: 426 MHz reception unit 52: 920 MHz transmission unit 54: 920 MHz reception units 56, 58, 60: switching unit 62: antenna

Claims (8)

An alarm system in which an interlocking group is composed of a plurality of alarms, and an alarm that detects a fire and performs an alarm operation transmits an interlocking signal to other alarms belonging to the interlocking group to perform an alarm operation. ,
The alarm is
A signal is transmitted and/or received by switching between the first frequency allocation band and the second frequency allocation band,
When a fire is detected, the interlocking signal is transmitted to other alarm devices belonging to the interlocking group using the first frequency band allocation band, and
Transmitting a transfer signal to other system equipment that does not belong to the interlocking group using the second frequency band allocation band during a pause period of the interlocking signal;
An alarm system characterized by:
The alarm system of claim 1, wherein
The interlocking signal transmitted from the alarm is
a start command signal transmitted multiple times while repeating a transmission period and a rest period; and a fire signal indicating that a fire has been detected, which is transmitted after the start command signal;
including
The transfer signal is transmitted during a pause period of the activation command signal,
An alarm system characterized by:
The alarm system of claim 2, wherein
The alarm device is capable of receiving a report transfer reception confirmation signal from the other system device during a period from the transmission of the report transfer signal to the end of the pause period of the activation command signal that transmitted the report transfer signal. receive standby state,
An alarm system characterized by:
The alarm system of claim 3, wherein
The alarm device cannot receive the notification reception confirmation signal from the other system device in the reception waiting state of the notification reception confirmation signal, and for a predetermined period after transmitting the fire signal, the other alarm device When the fire acknowledgment signal is ready to be received and the fire acknowledgment signal is received from all the other alarms in the fire acknowledgment signal reception standby state, it is instructed to transmit the report transfer signal. transmitting a first other system transfer request signal to a predetermined other alarm device;
The predetermined other alarm device that has received the first other system transfer request signal transmits the transfer signal to the other system device,
An alarm system characterized by:
The alarm system of claim 3, wherein
The alarm device cannot receive the notification reception confirmation signal from the other system device in the reception waiting state of the notification reception confirmation signal, and for a predetermined period after transmitting the fire signal, the other alarm device When a fire acknowledgment signal can be received and a fire acknowledgment signal can be received, and the fire acknowledgment signal cannot be received from any other alarm device in the fire acknowledgment signal reception standby state, the interlocking signal and the alarm transfer signal Sending a second other system transfer request signal instructing the transmission of to the predetermined other alarm device whose reception of the fire reception confirmation signal has been confirmed,
The predetermined other alarm device that has received the second other system transfer request signal transmits the interlocking signal including the start command signal and the fire signal, and the transfer signal during a pause period of the start command signal. to the other system device,
An alarm system characterized by:
In the alarm system according to claim 4 or 5,
The alarm device transmits the alarm transfer signal and receives the alarm transfer reception confirmation signal from the other system device, based on the alarm transfer reception confirmation history, to the other alarm devices. sending a transfer request signal or a second other system transfer request signal;
An alarm system characterized by:
In the alarm system according to any one of claims 2 to 6,
The alarm device also transmits the transfer signal during a rest period before transmitting the first activation command signal,
An alarm system characterized by:
In the alarm system according to any one of claims 1 to 7,
The communication operation using the first frequency allocation band is a communication operation using the 426 MHz band of the communication standard RCR STD-30,
The communication operation using the second frequency allocation band is a communication operation using a frequency allocation band of a communication standard different from the communication standard of the first frequency allocation band,
An alarm system characterized by:

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