JP2566240B2 - Wireless security system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wireless security system which transmits and receives an intrusion notification signal by a wireless signal.

[Background Art] Generally, as shown in FIG. 1, a wireless security system of this type in which an intrusion notification signal is transmitted and received by a wireless signal is intruded when a detection output is obtained from the intruder detection sensor 1. The wireless transmitter 2 transmits the notification signal V from the antenna 3 and the wireless receiver 5 that operates the notification means 6 when the intrusion notification signal V is received via the antenna 4. By the way, in such a security system, the wireless receiver 5 is provided with means for setting a warning state or a non-warning state, and during the non-warning period, only important security information such as fire, gas, and emergency call is provided. The received intrusion information is not processed during the non-warning period. In such a security system, it is not necessary to transmit the intrusion notification signal V from the wireless transmitter 2 during the non-warning period, but in the conventional example, the transmitting operation of the wireless transmitter 2 is stopped. Since no means is provided, when the meaningless intrusion notification signal V is frequently transmitted from the wireless transmitter 2, the power consumption of the wireless transmitter 2 is increased, and particularly the power consumption of the wireless transmitter 2 is increased. This is a big problem especially when a battery is used as the power source of the wireless transmitter 2. For example, when the wireless transmitter 2 is installed in a place such as a store or an office building where many people come and go, every time a passerby or a customer is detected during a non-warning period, such as when the store is open or during work, which does not require any warning. In addition, since the meaningless intrusion notification signal V is transmitted, the battery is exhausted so much that maintenance (battery replacement) is troublesome.
There was a problem that the battery might run out during the warning period, resulting in a false alarm. Furthermore, a meaningless intrusion notification signal V
There is a problem in that the traffic volume of the communication line is unnecessarily increased by the transmission of the message, and the transmission of important security information is hindered when people come and go frequently.
In order to solve such a problem, it is considered to provide the wireless transmitter 2 with means for stopping the transmission of the intrusion notification signal V of the wireless transmitter 2 for a non-warning period in response to a command from the wireless receiver 5 side. However, there is a problem that a circuit such as a receiving unit and a command determining unit is required on the wireless transmitter 2 side, and the circuit configuration becomes complicated and the cost increases.

[Object of the Invention] The present invention has been made in view of the above points, and it is an object of the present invention to reduce unnecessary transmission of a wireless transmitter to save power. Another object of the present invention is to provide an inexpensive wireless security system that does not hinder other wireless communication and has a simple circuit configuration.

DISCLOSURE OF THE INVENTION (Structure) The present invention relates to a wireless transmitter that transmits an intrusion notification signal when a detection output is obtained from an intruder detection sensor,
In a wireless security system including a wireless receiver that receives an intrusion notification signal, the wireless transmitter includes a notification control unit that appropriately stops transmission of the intrusion notification signal when the output frequency of the detection signal exceeds a predetermined value. By providing the wireless security system, it is possible to reduce wasteful power consumption of the wireless transmitter, and to provide a wireless security system which has a simple circuit configuration and is inexpensive.

(Embodiment 1) FIGS. 1 and 2 show an embodiment of the present invention.
A wireless transmitter 2 that transmits an intrusion notification signal V when a detection output is obtained from the intruder detection sensor 1 and a wireless receiver 5 that operates the notification means 6 when the intrusion notification signal V is received. In the configured wireless security system, the wireless transmitter 2 is provided with a notification control unit 11 that stops the transmission of the intrusion notification signal V for an appropriate time when the detection signal output frequency becomes equal to or higher than a predetermined value. Here, in the embodiment, the wireless transmitter 2 is
The signal receiving unit 10, the notification control unit 11, the signal transmission unit 12, and the power supply unit 13, a counter for detecting the output frequency of the detection signal is provided in the notification control unit 11, this counter. Is detected at a fixed time interval by a timer for setting a reference time, the output frequency of the detection signal is detected and the output frequency is determined, and the count and value of this counter exceed a specified value. Occasionally, the transmission of the intrusion notification signal V is stopped. In this case, before the timer for setting the reference time for measuring the number of outputs per unit time expires, when the output number of the detection signal reaches a predetermined value, the intrusion notification signal V is transmitted from that point. The notification control unit 11 is formed so as to stop. Further, the notification means 4 is formed of an intrusion display lamp or an alarm buzzer. FIG. 3 shows an example of the configuration of the intrusion notification signal V transmitted from the wireless transmitter 2. House code HC and unit code UC for preventing interference
And a notification signal DS indicating intrusion detection. The wireless receiver 3 is designed to receive and notify various security information such as a fire detection signal, a gas leak detection signal, and an emergency call signal in addition to the intrusion notification signal V as described above. Similarly to the conventional example, a changeover switch for switching between a warning state and a non-warning state is also provided.
Further, in the embodiment, the notification control unit 11 is formed so as to restart the transmission of the intrusion notification signal V when the output frequency of the detection signal becomes equal to or lower than the predetermined value, but the output frequency of the detection signal stops transmission. The notification control unit is configured to restart the transmission of the intrusion notification signal V when the second predetermined value, which is smaller than the predetermined value, is reached.
11 may be formed to have a hysteresis characteristic. Further, in order to prevent abuse, it goes without saying that the predetermined value for determining the stop or restart of the intrusion notification signal V may be set to an arbitrary value within a predetermined range. Furthermore, in the embodiment, the notification control unit 11 is formed so as to transmit an operation notification signal for notifying that the transmission of the intrusion notification signal V is stopped and restarted, and the wireless receiver 5 side. The operating state of the wireless transmitter 2 can be grasped.

FIG. 4 is a flow chart showing the operation of the embodiment. Now, when there is a detection signal between the time when the reference time setting timer of the notification control unit 11 starts and the time up, a signal is sent. When the intrusion notification signal V is transmitted from the transmission unit 12, a counter that counts the number of times the detection signal is output is incremented, and it is determined whether or not the count number is a predetermined number at which transmission is stopped. When the output frequency of the detection signal increases and the count number of the counter exceeds a predetermined number, an operation notification signal indicating that the non-warning state is set is transmitted to the wireless receiver side to that effect. Along with the notification, even if the detection signal is output, the non-warning state in which the intrusion notification signal V is not transmitted is set.

Next, even in the non-warning state, the output frequency of the detection signal is continuously checked, and when the count number becomes less than or equal to the predetermined number for restarting the transmission of the intrusion notification signal V, the warning state is set. The operation notification signal shown is transmitted to notify the wireless receiver 3 side, and the state returns to the alert state in which the intrusion notification signal V is transmitted when the detection signal is output. In this case, by setting the predetermined number of times to set the restart of the call smaller than the predetermined number of times to determine the stop of the call, the hysteresis characteristic is given, and it is possible to avoid the inconvenience that the warning state and the non-warning state are repeated in a short cycle. It is like this.

As described above, in the embodiment, the wireless transmitter 2 determines the output frequency by multiplying the number of times the detection signal is output per reference time, and when the output frequency is high, the intrusion notification signal V is transmitted. By setting to non-warning state,
It is possible to reduce the meaningless transmission of the intrusion notification signal V to save power in the wireless transmission unit.
It is convenient when the battery is driven. In addition, meaningless communication does not interfere with other communication (fire, gas leak, transmission of emergency call information, etc.). On the other hand, in the present invention, attention is paid to the fact that the wireless receiver 5 is often set to the non-warning state at the time when many people come and go, and the wireless transmitter 2 is set at this time.
Is set to a non-warning state, and an inexpensive wireless security system having a simple circuit configuration can be obtained as compared with a case where the wireless transmitter 2 is set to a non-warning state by a command from the wireless receiver 5 side. It will be. Furthermore, when the operating state of the wireless transmitter 2 is transmitted to the wireless receiver 5 side, there are a large number of people coming in and going out based on the warning and non-mechanical state of the wireless transmitter 2, but the wireless receiver 5 side. It is possible to prevent crimes by focusing attention on places where people are not in and out.

(Embodiment 2) FIG. 6 is a flow chart showing another embodiment of the intrusion notification signal V when the elapsed time from the output of the previous detection signal to the output of a new detection signal becomes a predetermined value or more. The notification control unit 11 is formed so as to restart transmission.

Now, when the detection signal is output from the intruder detection sensor 1, the time is stored, and when a new detection signal is output, the time from the previous output to the current output is calculated, and this time is entered. When it becomes longer than the predetermined time for restarting the transmission of the notification signal V, an operation notification signal indicating that a transition to the warning state of transmitting the intrusion notification signal V when the detection signal is output is transmitted, and the warning state is generated. It is designed to move to.

[Effects of the Invention] As described above, the present invention includes a wireless transmitter that transmits an intrusion notification signal when a detection output is obtained from an intruder detection sensor, and a notification unit when an intrusion notification signal is received. In a wireless security system composed of a wireless receiver to be operated, a wireless transmitter is provided with a notification control unit for appropriately stopping transmission of an intrusion notification signal for a certain period of time when the detection signal output frequency exceeds a predetermined value. Therefore, it is possible to reduce the meaningless transmission of the wireless transmitter to save power, and determine whether the wireless transmitter side should transmit the intrusion detection signal based on the output frequency of the detection signal. Therefore, it is possible to provide an inexpensive wireless security system with a simple circuit configuration compared to the case of sending a command from the wireless receiver side. There is an effect.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a wireless security system according to the present invention, FIG. 2 is a block circuit diagram of a main part of an embodiment of the present invention, FIGS. 3 to 5 are operation explanatory diagrams of the same, and FIG. It is operation | movement explanatory drawing of other Example. Reference numeral 1 is a sensor, 2 is a wireless transmitter, 5 is a wireless receiver, and 11 is a notification control unit.

Claims (7)

(57) [Claims] 1. A wireless transmitter for transmitting an intrusion notification signal when a detection output is obtained from an intruder detection sensor,
In a wireless security system including a wireless receiver that receives an intrusion notification signal, the wireless transmitter includes a notification control unit that appropriately stops transmission of the intrusion notification signal when the output frequency of the detection signal exceeds a predetermined value. A wireless security system characterized by being installed in. 2. The wireless system according to claim 1, wherein the notification control unit is formed so as to restart the transmission of the intrusion notification signal when the output frequency of the detection signal becomes equal to or lower than a predetermined value. Security system. 3. A notification control unit is formed to restart the transmission of the intrusion notification signal when the output frequency of the detection signal reaches a second predetermined value that is smaller than the predetermined value when the transmission is stopped. The wireless security system according to claim 1. 4. The notification control unit is formed so as to restart the transmission of the intrusion notification signal when the elapsed time from the output of the previous detection signal to the output of the new detection signal exceeds a predetermined value. The wireless security system according to claim 1. 5. An intrusion notification from the time when the output number of the detection signal reaches a predetermined value before the reference time setting timer for measuring the output number of the detection signal per unit time expires. The wireless security system according to claim 1, wherein the notification control unit is formed so as to stop transmitting the signal. 6. An informing control unit is formed so as to emit an operation informing signal for informing that the intrusion informing signal is to be transmitted and stopped when the intrusion alerting signal is stopped and restarted.
The wireless security system according to any one of items 1 to 5. 7. The wireless security according to claim 1, wherein a predetermined value for judging whether to stop or restart the transmission of the intrusion notification signal is set to an arbitrary value within a predetermined range. system.