JPH10334380A - Radio state transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manage the state change of monitoring object to occur when exchanging the battery of radio state transmitter. SOLUTION: Concerning the radio state transmitter for wirelessly transmitting the state of monitoring object to a controller for managing the monitoring object, this device is provided with plural sensors 4A-1, 4A-2... for detecting the state of the monitoring object, transmission part for transmitting the state detected by the sensors, battery 26A for supplying power to the control part and the transmission part, and a control part 22A judges that the battery is replaced when battery detection circuit part 27A for detecting the voltage of battery and when the battery detection circuit part 27A detects that the detected voltage of battery becomes 0 V and gets higher than a prescribed voltage later, the control part 22A can transmit the state detected by the sensors through the transmission part to the controller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a security system for notifying a security center via a communication line such as a telephone line from a controller which processes a status signal when a fire or an intruder is detected in a security area. More particularly, the present invention relates to a wireless status transmission device that wirelessly transmits a status detected by a door open / close sensor, an intruder sensor, or the like to a controller.

[0002]

2. Description of the Related Art In the above security system, various sensors such as a fire detection sensor, an intruder detection sensor, and a gas leak detection sensor are installed in a security area such as a condominium, a general house, a building, and a factory. The state of the monitoring target detected by the sensor is stored and managed by the controller. The controller is connected to a remote security center via a telephone line. In the security area, for example, if an intruder detection sensor detects an intruder, the controller reports an intrusion abnormality to the security center and responds from the security center. We take appropriate measures such as turning around.

[0003] The various sensors are, for example, magnet sensors, which detect the open or closed state of windows and doors to be monitored. Furthermore, various sensors are divided into sensors that output status signals to the controller by wire or wirelessly. The wireless sensor is connected to a battery-driven wireless status transmitter for transmitting a status signal to the controller. In the wireless state transmitting device, when the state detected by the connected sensor changes (for example, the window changes from the open state to the closed state), the current state (closed state) is wirelessly transmitted to the controller each time. . The controller stores and manages the current state (closed state) transmitted from the wireless state transmitting device at the timing of the state change. In addition, in order for the controller to shift the security area from the alert release state to the alert set state, the condition is that all sensors are in a normal state (for example, a state in which windows are closed).

[0004]

By the way, in the above-mentioned wireless status transmitting apparatus, when the battery runs out or when the battery is removed to replace the battery, the sensor status (the window is closed from the open state). State) changes,
The current state (closed state) cannot be transmitted to the controller. For this reason, the state (open state) before the state change is not updated in the controller, and the controller is in a management state inconsistent with the current state (closed state). In addition, 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 mismatched management state does not change. In order to avoid the possibility of the 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, which is problematic. Also, if you leave the management status mismatch, for example,
In the security system, a situation occurs in which the security is set with the window opened, and an intruder can enter the security area without opening the window (without having to open it). That is,
In some cases, the window opening / closing detection sensor does not detect an intruder.

[0005]

According to the present invention, there is provided a wireless status transmitting apparatus for wirelessly transmitting the status of a monitoring target to a controller for managing the monitoring target. A sensor for detecting the state of
A transmitting unit that transmits the state of the monitoring target detected by the sensor, a battery that supplies power to the control unit and the transmitting unit, and a battery detection circuit unit that detects a voltage of the battery, wherein the control unit is The battery detection circuit unit determines that the battery has been replaced when the detected voltage of the battery becomes 0 V and then becomes the return voltage, and notifies the controller of the state detected by the plurality of sensors via the transmitting unit. To be able to send. By this means, it is not necessary to manage the state of the monitoring target and to worry about the actual mismatch each time the battery is replaced as in the related art. Further, it is possible to avoid inconsistency between the current state of the monitoring target due to battery replacement and the monitoring target state stored in the controller.

[0006]

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, a security system is provided for each of a plurality of monitoring buildings A, B,... Multiple sensors 1
A, 2A, 3A, 4A, and control based on inputs from these sensors, such as making a report via the telephone line 7A to the security center 10 and setting the security area to a security set state or a security release state. A controller 5A is provided. For example, when the state of the monitored object changes from the sensors 1A, 2A, 3A to the controller 5A, the state signal is transmitted by wire. The sensor 4A includes a wireless status transmitting device 20.
A is provided, and the wireless status transmitting device 2 is transmitted from the sensor 4A.
When the status of the monitoring target changes, the status signal is wirelessly transmitted to the controller 5A via 0A. Controller 5
A is connected to a security center 10 via a telephone line 7A, an exchange 8, and a telephone line 9. Although the example of the sensor 4A and the wireless status transmitting device 20A has been described, a plurality of sensors may be connected to the wireless transmitting device. Further, the sensor may be incorporated in the wireless state transmitting device, or a switch activated by an operator in an emergency may be incorporated in the transmitting device.

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 wired sensor interface (I / F) 51A for inputting signals of the sensors 1A, 2A, 3A and a signal from the wireless sensor 4A via the state transmitting device 20A, Also,
An antenna 52A for transmitting to the transmitting device 20A, a transmitting unit 53A connected to the antenna 52A, and an antenna 52A
, And a state signal is input from the sensors 1A, 2A, and 3A from the wired sensor interface 51A at the time of a state change, and from the wireless state transmission device 20A via the receiving unit 54A as described above. A CPU (Central Processing Unit) ROM (Read Only Memory), R is used to input a state signal at the time of a state change, determine an abnormal state in the alert set state, and transmit the result to the security center 10.
A control unit 55A comprising an AM (Random Access Memory);
An operation unit 56A that sets the security area to a security set state (or set to a security release state) using a magnetic card, an IC card, or the like.
And a notification unit 57A for outputting data from the control unit 55A to the security center 10 via a telephone line, a display unit 58A for displaying a control state of the control unit 55A, and an exchange (A
C) The power is converted to direct current (DC), and the transmission unit 53A, the reception unit 54A, the control unit 55A, the operation unit 56A, the notification unit 57
A, a power supply unit 59A for supplying DC power to the display unit 58A is provided.

FIG. 3 is a block diagram of the wireless status transmitting apparatus 20 shown in FIG.
FIG. As shown in the figure, a wireless status transmission device 20A is provided with a sensor 4 provided in a monitoring target.
A-1, 4A-2... For monitoring the state of the sensor, that is, the state of the monitoring target via the sensor interface 21A, and transmitting and displaying when the monitoring target changes state. And a transmission unit 23 for transmitting a status signal processed by the control unit 22A.
A, an antenna 24A connected to the transmission unit 23A, a display unit 25A controlled by the control unit 22A and displaying a state signal while transmitting the status signal to the controller 5A, a sensor interface 21A, the control unit 22A, Part 23A,
A battery 26 that supplies power to the display unit 25A and a battery detection circuit unit 27A that detects the voltage of the battery 26 and outputs the detected voltage to the control unit 22A are provided.

FIG. 4 is a flowchart for explaining 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.
6 is a timing chart supplementing the description of the operation example of FIG. In step S1 of FIG. 4 (see FIG. 5), it is determined from the sensor 4A whether or not the state of the monitored object has changed.
In step S2, if there is a status change, a status 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) which is a battery near-end voltage. If not, 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 sampled value of the detection voltage of the battery detection circuit unit 27A becomes lower than the threshold value four times in succession (see (1) in FIG. 5). Further, it sends battery near-end information to the controller 5A. This is for urging replacement of the battery 26A. The transmission of the battery near-end information causes the voltage of the battery 26A to drop slightly. 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. In step S6, if there is a status change, a status 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 thereafter (see (3) of FIG. 5), the detection voltage of the battery detection circuit unit 27A becomes higher than the threshold value, it is determined that the battery has been replaced (see FIG. 5). (See (4)), the flag of the battery near-end abnormality is released. If the replacement has not been performed yet, the process returns to step S5. In step S8, a battery recovery signal is
Send to A. In step S9, the plurality of sensors 4
A-1, 4A-2,... That is, after the battery is replaced, the current state is notified to the controller 5A even if the state of the monitoring target does not change. Therefore, even if the state of the monitoring target changes during the battery replacement, the state is stored in the controller 5A. The status of the monitoring target that is present can be updated and stored. Therefore, the state of the monitoring target can be accurately grasped by the controller 5A.

[0010]

As described above, according to the present invention, when the battery is replaced, the current state of the monitored object is transmitted to the controller. The states become consistent.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a security system according to the present invention.

FIG. 2 is a diagram illustrating a controller 5A of FIG. 1;

FIG. 3 is a diagram illustrating 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 that supplements the description 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: Controller 23A: Transmitter 24A: Antenna 26A: Battery 27A: Battery Detection circuit

Claims (2)

[Claims] 1. A wireless status transmitting device for wirelessly transmitting the status of a monitoring target to a controller that manages the monitoring target, comprising: a sensor for detecting the status of the monitoring target; A transmission unit for transmitting a state; a battery for supplying power to the control unit and the transmission unit; and a battery detection circuit unit for detecting a voltage of the battery, wherein the control unit is detected by the battery detection circuit unit. A wireless state transmission device, wherein when the battery is determined to be replaced based on the voltage, a state detected by the sensor is transmitted to the controller via the transmission unit. 2. The wireless status transmission 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 0 V and becomes equal to or higher than a predetermined voltage. apparatus.