JP3739177B2 - Security system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a controller for processing a status signal which detected the fire and intruder in security zone relates to a security system for a notification to a security center via a communication line such as a telephone line.
[0002]
[Prior art]
In the above security system, various sensors such as fire detection sensors, intruder detection sensors, and gas leak detection sensors are installed in the security areas of condominiums, ordinary houses, buildings, factories, etc., and are detected by these sensors. The state of the monitored object is stored and managed by the controller. The controller is connected to a remote security center via a telephone line. When an intruder detection sensor detects an intruder in the security area, for example, an intrusion abnormality is reported from the controller to the security center, and the security center takes action. Appropriate countermeasures are taken, such as those who face.
[0003]
The various sensors are, for example, magnet sensors, and are sensors that detect the open or closed state of windows and doors to be monitored. Further, the various sensors are classified into sensors that output a status signal to the controller in a wired or wireless manner. Among these, the wireless sensor is connected to a wireless status transmitter that is driven by a battery to transmit a status signal to the controller. In the wireless state transmission device, whenever the state detected by the connected sensor changes (for example, when the window changes from the open state to the closed state), the current state (closed state) is wirelessly transmitted to the controller. . The controller stores and manages the current state (closed state) transmitted from the wireless state transmission device at the timing of state change. In addition, in order for the controller to shift the security area from the warning release state to the warning set state, it is a condition that all the sensors are in a normal state (for example, a window is closed).
[0004]
[Problems to be solved by the invention]
By the way, in the above-described wireless status transmission device, when the battery runs out, or when the battery is removed to replace the battery, if there is a change in the sensor state (the window is open to the closed state), The state (closed state) cannot be sent to the controller. For this reason, in the controller, the state before the state change (open state) remains unupdated, and is in a management state inconsistent with the current state (closed state). Moreover, even if the battery is replaced, the current state is not transmitted to the controller unless the detection state (closed state) of the sensor changes, so that the mismatch management state does not change. In order to avoid the possibility of this inconsistent management state, it is necessary to change the state of the monitoring target in order to change the detection state of the sensor every time the battery is replaced. In addition, if the management state is left unmatched, for example, in a security system, a situation occurs in which a security set state occurs with a window opened, and an intruder does not open the window (no need to open it). Can invade. In other words, the window open / close detection sensor may not detect an intruder.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a wireless status transmission device that wirelessly transmits a status of a monitoring target, and a controller that updates and stores the status of the transmitted monitoring target and manages the monitoring target In the security system, the wireless status transmission device includes a sensor that detects the status of the monitoring target, a transmission unit that transmits the status of the monitoring target detected by the sensor, a control unit, and the A battery for supplying power to the transmission unit, a battery detection circuit unit for detecting the voltage of the battery, a voltage detected by the battery detection circuit unit when the state of the monitoring target detected by the sensor changes A control unit that performs control to transmit the state detected by the sensor to the controller via the transmission unit when it is determined that the battery has been replaced based on It shall be equipped with. According to the present invention, it is possible to avoid a mismatch between the current state of the monitoring target due to battery replacement and the state of the monitoring target stored in the controller.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a security system according to the present invention. As shown in the figure, the security system is provided for each of a plurality of monitored buildings A, B,... For detecting intruders, detecting fires, detecting windows open / closed, etc. A plurality of sensors 1A, 2A, 3A, 4A and a telephone line 7A to the security center 10 based on inputs from these sensors, or the security area is set to a warning set state or a warning release state. A controller 5A for controlling the above is provided. For example, the state signal is transmitted by wire from the sensors 1A, 2A, 3A to the controller 5A when the state of the monitoring target changes. The sensor 4A is provided with a wireless status transmission device 20A, and the status signal is wirelessly transmitted from the sensor 4A via the wireless status transmission device 20A to the controller 5A when the state of the monitoring target changes. The controller 5A is connected to the security center 10 via the telephone line 7A, the exchange 8, and the telephone line 9. In addition, although shown in the example of the sensor 4A and the wireless status transmission device 20A, a plurality of sensors may be connected to the wireless transmission device. In addition, the sensor may be incorporated in a wireless status transmission device, or a switch that is activated by an operator in an emergency may be incorporated in the transmission device.
[0007]
FIG. 2 is a diagram for explaining the controller 5A of FIG. As shown in the figure, the controller 5A receives a signal from the wireless sensor 4A via the wired sensor interface (I / F) 51A for inputting the signals of the sensors 1A, 2A, and 3A, and the status transmitter 20A. In addition, the antenna 52A for transmitting to the transmitter 20A, the transmitter 53A connected to the antenna 52A, the receiver 54A connected to the antenna 52A, and the wired sensor interface 51A to the sensors 1A, 2A, 3A when the state changes A status signal is input, and as described above, a status signal is input from the wireless status transmitter 20A via the receiver 54A when the status changes, and an abnormal state in the alert set state is judged and the result is guarded. A control unit 5 including a CPU (Central Processing Unit) ROM (Read Only Memory) and a RAM (Random Access Memory) for performing control to be transmitted to the center 10. 5A, the operation unit 56A for setting the inside of the security area to the warning set state (or setting the warning release state) by using a magnetic card, an IC card, etc., and the data from the control unit 55A are put on the telephone line and output to the security center 10 A notification unit 57A for displaying, a display unit 58A for displaying the control state of the control unit 55A, an alternating current (AC) power source is converted into a direct current (DC), and a transmission unit 53A, a reception unit 54A, a control unit 55A, and an operation unit 56A. , A notification unit 57A and a power supply unit 59A for supplying DC power to the display unit 58A.
[0008]
FIG. 3 is a diagram illustrating the wireless status transmission device 20A of FIG. As shown in the figure, the wireless status transmission device 20A includes a sensor interface (I / F) 21A for connecting the sensors 4A-1, 4A-2,. The state of the sensor, that is, the state of the monitoring target is monitored, and when the monitoring target changes, the control unit 22A composed of a CPU, RAM, and ROM that performs processing for transmission and display, and the status signal processed by the control unit 22A are transmitted. A transmitting unit 23A, an antenna 24A connected to the transmitting unit 23A, a display unit 25A that is controlled by the control unit 22A and displays a status signal to the controller 5A during transmission, a sensor interface 21A, and a control unit 22A, a transmission unit 23A, a battery 26 for supplying power to the display unit 25A, and a voltage detected by the battery 26 to detect the detected voltage. It comprises a battery detection circuit section 27A for outputting the A.
[0009]
FIG. 4 is a flowchart illustrating an operation example in which the control unit 22A forms a state signal based on the detection voltage input from the battery detection circuit unit 27A, and FIG. 5 supplements the description of the operation example in FIG. It is a timing chart. In step S1 of FIG. 4 (see FIG. 5), it is determined from the sensor 4A whether there is a state change in the monitoring target. In step S2, if there is a state change, a state change notification is sent to the controller 5A. In step S3, if there is no state change, it is determined whether the detection voltage input from the battery detection circuit unit 27 is lower than a threshold value (TH level) that is a battery near-end voltage. If not lower, the process returns to step S1. In step S3, if the battery voltage is lower than the battery near-end voltage, a battery near-end abnormality flag indicating that the life of the battery 26A is approaching is set. The battery near-end abnormality flag is generated, for example, when the sampling value of the detection voltage of the battery detection circuit unit 27A is continuously lower than the threshold value four times (see (1) in FIG. 5). Further, battery near-end information is sent to the controller 5A. This is to encourage replacement of the battery 26A. Due to the transmission of the battery near-end information, the voltage of the battery 26A slightly drops. Thereafter, the battery near-end state continues until replacement (see (2) in FIG. 5). In step S5, it is determined whether there is a state change. If there is a state change in step S6, a state change notification is sent to the controller 5A. In step S7, it is determined whether the battery has been replaced. When the detection voltage of the battery detection circuit unit 27A becomes 0 V and then (see (3) in FIG. 5), the battery detection circuit unit 27A determines that the battery has been replaced (see FIG. 5). (Refer to (4)), cancel the battery near-end abnormality flag. If the exchange has not yet been performed, the process returns to step S5. In step S8, a battery recovery signal is transmitted to the controller 5A. In step S9, notification of the current state of the plurality of sensors 4A-1, 4A-2,. That is, even after the battery replacement, the current state is notified to the controller 5A even if the monitoring target state does not change. Even if the monitoring target state changes during battery replacement, the controller 5A stores the current state. The status of the monitored object can be updated and stored. Therefore, the state of the monitoring target can be accurately grasped by the controller 5A.
[0010]
【The invention's effect】
As described above, according to the present invention, when the battery is replaced, the current state of the monitoring target is transmitted to the controller, so that the state of the monitoring target managed by the controller matches the actual state even when the battery is replaced. become.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a security system according to the present invention.
FIG. 2 is a diagram for explaining a controller 5A of FIG.
FIG. 3 is a diagram for explaining a wireless status transmission device 20A of FIG. 1;
FIG. 4 is a flowchart illustrating an operation example in which a control unit 22A forms a state signal based on a detection voltage input from a battery detection circuit unit 27A.
FIG. 5 is a timing chart supplementing the explanation of the operation example of FIG. 4;
[Explanation of symbols]
1A, 2A, 3A ... Sensor 4A, 4A-1, 4A-2 ... Sensor 5A ... Controller 20 ... Wireless status transmitter 21A ... Sensor interface 22A ... Control unit 23A ... Transmitter 24A ... Antenna 26A ... Battery 27A ... Battery Detection circuit

Claims (2)

A security system comprising: a wireless status transmission device that wirelessly transmits a status of a monitoring target; and a controller that updates and stores the transmitted status of the monitoring target and manages the monitoring target;
The wireless status transmitter is
A sensor for detecting the state of the monitoring target;
A transmission unit for transmitting the state of the monitoring target detected by the sensor;
A battery for supplying power to the controller and the transmitter;
A battery detection circuit unit for detecting the voltage of the battery;
When the state of the monitoring target detected by the sensor changes, and when it is determined that the battery has been replaced based on the voltage detected by the battery detection circuit unit , the state detected by the sensor is transmitted to the transmission unit. A control unit that performs control to transmit to the controller via
A security system comprising: The security system according to claim 1, wherein the control unit determines that the battery has been replaced when the voltage detected by the battery detection circuit unit becomes equal to or higher than a predetermined voltage after the voltage becomes 0V .

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