JPH0318235B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply control method in a security system that detects abnormal information such as fire or intrusion occurring within a security area.

Conventionally, a plurality of anomaly detectors are installed within a predetermined security area, and anomaly information from these detectors is converted into electrical signals and sent to a specific monitoring device by wired or wireless means. A security system has been proposed in which a monitoring device transmits a command signal such as starting or canceling a warning to monitor the presence or absence of an abnormality in an installed abnormality detector. The configuration of such a security system consists of a group of anomaly detectors placed at appropriate locations within a security area such as inside a building, and a battery-powered unit attached to the anomaly detectors that transmits anomaly information or receives command signals. a transmitting/receiving device, and a monitoring device installed at a predetermined location within a security area for receiving abnormality information from the transmitting/receiving device and reporting it to a monitoring station or transmitting a command signal from the monitoring station to the transmitting/receiving device. It is completed. In security systems such as those described above, wireless means are used for aesthetic purposes and to save labor during construction, and there is a tendency for batteries to be used as a power source.

In order to save on battery consumption, conventional methods have been used to drive the device intermittently by turning the battery on and off. However, when this method is used in a security system, due to the nature of the security system, command signals such as starting security or canceling security from the monitoring device are immediately received by the transmitting/receiving device, and the abnormality detector is set according to the command signal. Although it is necessary to keep the power off time as short as possible when
When the power supply is driven intermittently, there is a contradictory problem in that if the off time is short, the power saving effect will not be enhanced. If the off time is lengthened in order to increase the power saving effect, the security system cannot be instantaneously set as desired by the subscriber, and if the command signal is shorter than the off time, the transmitting/receiving device cannot receive the command signal. Therefore, there was a problem in that the command signal had to be sent for a time period longer than the off time. The present invention has been proposed to solve the above problems, and its purpose is to focus on the fact that the frequency of command signals sent out in a security system per day is extremely low, and to To provide a power supply control system for a security system which enables early reception by a transmitter/receiver to set the security system according to the subscriber's request when a subscriber's request occurs, and improves the power saving effect.

An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, the security system for implementing the power supply control method in the security system according to the present invention includes a group of abnormality detectors (40a to 4nn) placed at appropriate locations within the security area, and a transmitting/receiving device ( 30a to 3nn), a relay means 20a that issues commands to each transmitting/receiving device or receives abnormality information, and controls the plurality of transmitting/receiving devices; The system is comprised of a monitoring device 1 that reports to In such a configuration, the monitoring device 1 responds to the operation of the mode setting unit to set the security mode,
For example, a command signal indicating the start or release of security in a security area is sent to the transmitting/receiving device via a relay means, but prior to sending the command signal, the transmitting/receiving device is kept in a reception ready state for a predetermined period of time. A standby signal, which is a power supply control signal, is sent out, followed by a command signal. In addition, a group of abnormality detectors connected to the transmitting/receiving device are placed at appropriate locations within the security area to detect intrusion into the security area, fire, gas leak, emergency call, etc. sent to. Furthermore, even during normal operation, the current state is detected by the transmitter/receiver device. Furthermore, in order to save power, the transmitting/receiving device becomes ready for reception for a predetermined period of time based on the standby signal as described above, and subsequently receives command signals such as starting security, canceling security, etc. transmitted from the monitoring device via the relay means. In response to this command signal, the transmitting circuit, abnormality detection circuit, etc. of the transmitting/receiving device are turned on or off.

FIG. 2 shows the circuit configuration of each device for implementing the power control method in the security system according to the present invention. The monitoring device 1 includes a mode setting section 14 that sets command signals such as starting security and canceling security, a memory 15 that temporarily stores command signals set by the mode setting section, and a memory 15 that temporarily stores command signals set by the mode setting section. A standby signal activation circuit 13 that is activated and sends out a standby signal to control the power supply of the transmitting/receiving device prior to a command signal, a transmitting circuit 11 that transmits the standby signal and command signal to the relay means, and each signal transmitted from the relay means. A receiving circuit 16 receives the signal, and discriminates the signal received by the receiving circuit, and sends it to the display section if the signal indicates an abnormal or normal situation, and sends it to the memory if it is a confirmation signal for receiving the standby signal. , a discrimination circuit 17 that sends a signal to the standby signal activation circuit (trigger) in the case of a standby signal missing signal; a display section 18 that displays in accordance with the signal sent from the discrimination circuit;
The standby signal reception confirmation circuit 12 is configured to send out a signal to confirm whether or not the relay device is reliably receiving the standby signal after a certain time delay after the standby signal activation circuit is activated.

The relay means 20 includes an identification circuit 20 that receives a signal sent from the monitoring device and identifies and judges the signal.
2. A transmitting circuit 203 that sends the signal to the transmitting/receiving device via the antenna when the identification circuit identifies it as a standby signal or a command signal, and a timer that starts when the identification circuit identifies it as a standby signal. 204. Discrimination circuit 20 which is activated when the standby signal reception confirmation signal is received in the discrimination circuit and determines whether or not the relay means is receiving the standby signal depending on whether or not the timer is operating at this time.
5. Consists of a receiving circuit 206 that receives the current status signal or abnormal signal sent from the transmitting/receiving device through an antenna and sends it to the monitoring device.
The transmitting/receiving device 30 includes a receiving circuit 306 that receives a standby signal and a command signal from the relay means 20;
A detection circuit 304 is connected to a detector 40 installed in the security area and detects whether the detector is abnormal or normal.The detection circuit 304 reads the signal received by the receiving circuit and sends the detection circuit to the security release signal in accordance with the signal. It is activated so that it is turned off when the signal is received and turned on when the security start signal is received.Furthermore, the power of the transmitting circuit is turned on when an abnormal or normal signal from the detector is received from the detection circuit, and the power of the receiving circuit is turned on in response to the standby signal. a control circuit 303 that operates to turn on only for a certain period of time, and normally controls the receiving circuit and the detection circuit to be turned on and off intermittently; and a sending circuit that sends the signal detected by the detection circuit to the relay means. 302, and a battery 305 as a power source.

In such a configuration, the receiving circuit 306 and the detecting circuit 304 of the transmitting/receiving device 30 are driven intermittently, for example, so that the battery is turned on for about 10 msec at 3 second intervals (ts). Now, when a mode such as start security, release security, etc. is set in the mode setting section 14, the mode is temporarily stored in the memory 15, and the standby signal starting circuit 13
Start up. The standby signal is sent to the transmitter circuit 11
The signal is sent to the relay means 20 through. At this time, when there are a plurality of relay means 20, a standby signal is transmitted from the transmitting circuit 11 at the same time. In the relay means 20, the standby signal is received by the identification circuit 202, and when it is identified as a standby signal, the timer 204 is activated and at the same time, the standby signal is sent from the transmitting circuit 203 to the transmitting/receiving device 30 via the antenna 201. . The standby signal is sent for 3.1 seconds (ta), which is longer than ts seconds, for example. Therefore, the transmitting/receiving device 30 always receives the standby signal. The receiving circuit 306 of the transmitting/receiving device 30 receives the signal for a time width of 10 msec during driving, and sends the signal to the control circuit 303. After confirming standby reception, the control circuit 303 turns on the receiving circuit 302 for a certain period of time, for example, 10 seconds (continues to supply power). However, in this state, the monitoring device 1
It cannot be determined with certainty whether the relay means 20 and the transmitting/receiving device 30 are receiving the standby signal.
In this case, the transmitting/receiving device 3
The transmitting/receiving device 30 cannot receive the next command signal unless the standby signal is reliably received by the transmitting/receiving device 30 and the abnormality detector 40 connected to the transmitting/receiving device each time the command signal is received.
Unable to restore the status (current status), monitoring device 1
In this case, even if the device of the transmitter/receiver 30 is normal, it will be determined that the device is abnormal. Therefore, in order to cope with this, the monitoring device 1 sends out a confirmation signal as to whether or not the relay means 20 has reliably confirmed the standby signal. Based on this confirmation signal, the monitoring device can determine whether the relay means 20 or the transmitting/receiving device 30 is abnormal. This means that equipment abnormalities in the devices that make up the security system can be detected quickly, and recovery can be done quickly, increasing the reliability and certainty of the security system (MTBF.MTTR).
It also increases. Next, the standby signal reception confirmation signal will be explained in detail. At the same time that the standby signal is sent from the monitoring device 1, the standby signal reception confirmation circuit 12 is activated by the standby signal activation circuit 13, and the standby signal reception confirmation circuit transmits the standby signal reception confirmation signal after a certain time delay. It is sent to relay means 20 through a circuit and an antenna. In the relay means 20, when the standby signal confirmation signal is identified by the identification circuit 202, it is sent to the determination circuit 205. The determination circuit 205 sends a reception confirmation (ACK) or non-reception (NCK) signal to the monitoring device 1 depending on whether or not the timer 204 is running. Here, the timer 204 is set to the same time as the time during which the receiving circuit 306 of the transmitting/receiving device 30 continues to be turned on for a certain period of time. When the NCK signal is sent, it is received by the receiving circuit 16 of the monitoring device 1, and when the determining circuit 17 reads it as an unreceived signal, the standby signal starting circuit 13 is activated to send out the standby signal again. The subsequent operations are the same as described above. Furthermore, when an ACK is sent, it is sent to the discrimination circuit 17 via the receiving circuit 16. In the discrimination circuit, if it is discriminated as ACK, it activates the memory 15 and sends a command signal corresponding to the mode temporarily stored in the memory to the transmitting circuit 1.
1 and then to the relay means 20. The relay means transmits the command signal to the transmitting/receiving device, turns off the detection circuit connected to the intrusion detector when the command signal is a security release signal, and further turns off the detection circuit connected to the intrusion detector when it is a security start signal. Turn on the detection circuit intermittently. These command signals are sequentially polled from the monitoring device 1 to the relay means 20. At this time, the relay means 20 collects the current state of the transmitting/receiving device managed by the interrupting means in response to the sending of the command signal. Furthermore, when unreceived signals from the relay means are continuously received, a discrimination circuit of the monitoring device may count the number of times, and when a certain number of times is reached, an abnormality may be displayed. It goes without saying that the same effect can be obtained even if the relay means is incorporated into the monitoring device, and wireless means may be used between the relay means and the monitoring device.

In this way, the system according to the present invention is such that the transmitting/receiving device 30 is always driven by batteries intermittently and receives a standby signal which is a power control signal, so that the power is turned on for a certain period of time only when necessary, and the monitoring device 1 By checking whether the standby signal is reliably received by the relay means 20, the power saving effect can be increased as much as possible, the command signal can be reliably sent in a short time, and the relay means can check whether the transmitter/receiver is abnormal or not. This makes it possible to determine whether a device is abnormal or not, increasing the reliability of the security system and reducing power consumption. Furthermore, the security system's command signal is sent several times a day, and the amount of time it is dedicated to it is extremely short in total, so when turning on the power intermittently, set the time width to 10 msec.
The power saving effect is enhanced by providing a power control signal that operates the power supply only when necessary.

[Brief explanation of the drawing]

Figure 1 shows the configuration diagram of the security system, and
The figure is a block diagram of a device for implementing a power control method in a security system according to the present invention. (Explanation of symbols), 1...Monitoring device, 11,203,
302... Transmission circuit, 12... Standby signal reception confirmation circuit, 13... Standby signal activation circuit,
14...mode setting section, 15...memory, 16,
206, 302...receiving circuit, 17,205...
Discrimination circuit, 18...display section, 20...relay means,
30... Transmitting/receiving device, 40... Abnormality detector, 20
2...Identification circuit, 204...Timer, 303...
Control circuit, 304...detection circuit, 305...power supply.

Claims (1)

[Scope of Claims] 1. A transmitting/receiving device connected to an abnormality detector disposed at a suitable location in a security area and intermittently driven by a battery, and security initiation to the transmitting/receiving device via at least one or more relay means. In a security system comprising a monitoring device that sends out a command signal such as , security release, etc., the monitoring device sends out a power control signal to each relay means at the same time prior to the command signal, and sends out the power control signal. transmitting means for sequentially transmitting a confirmation signal confirming reception of the power control signal after a predetermined period of time to each relay means, and upon receiving the power control signal, the relay means controls the power supply to the transmitting/receiving device. a timer that is activated upon transmitting a signal; a determining unit that determines whether or not the timer is in operation upon receiving the confirmation signal;
power control in a security system, comprising transmitting means for transmitting a determination result by the determining means to the monitoring device, wherein the transmitting/receiving device is applied with voltage for a predetermined time according to the power control signal. method. 2. The security device according to claim 1, wherein the monitoring device retransmits the power supply control signal when the determination result received from the relay means does not indicate that the timekeeping means is in operation. Power control method in the system. 3. A power supply control system in a security system according to claim 1 or 2, wherein the timer is configured to operate during the time that the transmitting/receiving device operates in response to the power supply control signal.