JP3541161B2 - Wireless repeater - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wireless repeater installed between a sensor detection signal transmitting unit and a receiver in a security system that guards a predetermined area using various sensors that detect abnormalities.
[0002]
[Prior art]
Conventionally, in a security system, an abnormality detection sensor such as a sensor for detecting an intruder or a fire is installed in a security area, and when the sensor detects them, a receiver installed in the vicinity of the security area by wire or wirelessly is used. A detection signal was being transmitted. Further, in order to streamline the security system, detection signals from a plurality of sensors are once transmitted to a sensor transmitter, and the detection signals are sometimes transmitted from the sensor transmitter to a receiver. Then, the receiver that has received the detection signal notifies the abnormality by a buzzer or a lamp on the spot, or transmits an alarm to a remote monitoring center.
[0003]
And, in such a security system, from the reason of avoiding the complexity of wiring work and maintaining the appearance, the sensor or the sensor transmitter, that is, from the sensor detection signal transmitting means to the receiver. In many cases, the detection signal was transmitted wirelessly, not by wire. In such a case, when the distance from the sensor detection signal transmitting means to the receiver is long or when there is a shield between them, a wireless repeater is provided.
[0004]
[Problems to be solved by the invention]
However, when two or more wireless repeaters are used, two or more wireless repeaters cannot receive a wireless signal from one sensor or sensor transmitter, and the originally one detection signal becomes two. In some cases, the transmission and reception of wireless signals are repeated between wireless repeaters, and the receiver cannot properly process wireless signals due to continuous reception in a short time.
[0005]
In addition, since the display unit for displaying the reception environment of the wireless repeater usually has only two indications of “OK” and “NO”, it is not possible to know further details regarding the reception environment. Therefore, for example, when the test of the reception environment is “OK”, the reception environment becomes “impossible” due to some influence during the actual operation, and the transmission and reception of the wireless signal may not be performed.
[0006]
SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and prevents a useless radio signal from being generated even when a plurality of repeaters are used when transmitting a signal from a sensor to a receiver. To provide a wireless repeater.
[0007]
Another object of the present invention is to provide a wireless repeater including a display unit capable of displaying the reception status of the wireless repeater in a more detailed manner.
[0008]
[Means for Solving the Problems]
The above object is achieved by the following means of the present invention.
[0009]
The invention according to claim 1 is a wireless repeater installed between a sensor detection signal transmitting unit and a receiver in a security system, wherein the receiving unit receives a wireless signal, and the transmitting unit transmits a wireless signal. A determining unit that determines whether the received wireless signal is a wireless signal from a sensor detection signal transmitting unit or a wireless signal from another wireless relay device; and a wireless signal or another wireless signal from the sensor detection signal transmitting unit. When the wireless signal from the repeater is one of the wireless signals, the receiver switches the receiver to set the wireless signal to be transmitted, and connects to the receiver, transmitter, determination unit, and receiver switch When the receiving destination switching unit is set on the transmitting side of the detection signal of the sensor, the transmitting unit transmits the radio signal only when the receiving unit receives the radio signal from the transmitting unit of the detecting signal of the sensor. Switching unit is in radio A radio repeater, characterized in that the receiving unit and a control unit for transmitting a radio signal from the transmitting unit only when receiving a radio signal from another wireless relay apparatus when it is set to the machine side.
[0010]
In the wireless repeater of the present invention, when the receiving destination switching unit is set on the side of the sensor detecting signal transmitting unit, the transmitting unit transmits the wireless signal from the transmitting unit only when the receiving unit receives the wireless signal from the sensor detecting signal transmitting unit. A signal is transmitted, and when the receiving destination switching unit is set to the wireless repeater, the transmitting unit transmits the wireless signal only when the receiving unit receives a wireless signal from another wireless relay. Accordingly, even when a signal from the sensor is transmitted to the receiver using a plurality of wireless repeaters, the wireless repeater receives the signal from the sensor and the signal from the wireless repeater in an overlapping manner. Can be avoided.
[0011]
According to a second aspect of the present invention, in the first aspect, the transmitting unit transmits the wireless signal by adding an identification signal to the wireless signal from the sensor detection signal transmitting means, and thereby the determining unit detects the sensor. A wireless repeater characterized by determining a wireless signal from a signal transmitting unit and a wireless signal from another wireless repeater.
[0012]
In the present invention, an identification signal is added to the wireless signal from the sensor detection signal transmitting means, and based on the identification signal, the determination unit determines whether the wireless signal from the sensor detection signal transmitting means and the wireless signal from another wireless repeater are transmitted. The radio signal is determined.
[0013]
According to a third aspect of the present invention, in the wireless repeater according to the first or second aspect, the time from when the receiving unit receives the wireless signal to when the transmitting unit transmits the wireless signal is set to two or more types. A wireless repeater comprising a delay time switching unit capable of performing the following.
[0014]
In the present invention, even when two wireless repeaters receive a signal, one of the wireless repeaters can transmit with a delay in time, so that the receiver can distinguish and receive each. it can.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 is a block diagram showing the functions of the wireless repeater according to the embodiment of the present invention. The wireless repeater 1 includes a control unit 11, a receiving unit 12, a transmitting unit 13, a first display unit 14, a second display unit 15, a destination switching unit 16, a delay time switching unit 17, a storage unit 18, and a determination unit 19. Have.
[0019]
The receiving unit 12 receives a wireless signal from a detection signal transmitting unit (not shown) of the sensor. As long as the means for transmitting the detection signal of the sensor is built-in to the sensor, a means for transmitting a radio signal when a detection signal is input from one or more sensors, such as a sensor transmitter, may be used. is there. The transmitting unit 13 transmits a wireless signal. The first display unit 14 and the second display unit 15 are used to indicate a state of reception of a wireless signal by the reception unit 12, and each of them takes on a state of lighting or blinking.
[0020]
When the wireless signal received by the receiving unit 12 is a wireless signal from a transmitting unit of the detection signal of the sensor or a wireless signal from another wireless repeater, the receiving destination switching unit 16 transmits the wireless signal. Set whether to transmit wireless signals from the unit.
[0021]
The delay time switching unit 17 sets two or more types of time from when the receiving unit receives the wireless signal to when the transmitting unit transmits the wireless signal. The storage unit 18 stores transmission means of the detection signal of the sensor, data content of a wireless signal transmitted by another wireless repeater, and the like. The determination unit 19 compares the received wireless signal with the wireless signal stored in the storage unit 18 to determine whether the wireless signal is a wireless signal from a sensor detection signal transmitting unit or a wireless signal from another wireless repeater. judge. To make the determination, the wireless signal from the wireless repeater is obtained by adding the identification signal to the wireless signal from the sensor detection signal transmitting means. For example, the addresses of the wireless signal from the transmitting means of the detection signal of the sensor are 001 and 099, and the wireless signal from the wireless repeater may change the hundreds digit to a number other than 0 (015 → 315, etc.). ). Needless to say, the identification signal may be added to another part of the data instead of the address part.
[0022]
The control unit 11 is connected to the reception unit 12, the transmission unit 13, the first and second display units 14 and 15, the reception destination switching unit 16, the delay time switching unit 17, the storage unit 18, and the determination unit 19, and switches the reception destination. When the unit 16 is set on the sensor detection signal transmitting unit side, the transmitting unit 13 transmits the wireless signal only when the receiving unit 12 receives the wireless signal from the sensor detecting signal transmitting unit. When 16 is set on the wireless repeater side, the wireless signal is transmitted from the transmitter 13 only when the receiver 12 receives a wireless signal from another wireless repeater.
[0023]
FIG. 2 shows a security system for transmitting a detection signal from a sensor using the wireless repeater of the present embodiment, wherein two sensors are provided between one or a plurality of sensors or sensor transmitters 10 n and the receiver 3. FIG. 3 is a schematic diagram when a wireless repeater 1 and a wireless repeater 2 are installed in series. The wireless repeater 2 has the same configuration as the wireless repeater 1 in FIG. The receiver 3 is installed in the vicinity of a security area, receives a detection signal from a sensor, reports an abnormality with a buzzer or a lamp on the spot, or sends an alarm to a remote monitoring center.
[0024]
In the wireless repeater 1, the reception destination switching unit 16 is set as a sensor, and the delay time switching unit 17 is set without a delay time. In the wireless repeater 2, the receiving destination switching unit 17 is set as a wireless relay, and the delay time switching unit 17 is set without a delay time.
[0025]
FIG. 3 is a schematic diagram when a sensor and a wireless repeater are installed in parallel. In the wireless repeater 1, the reception destination switching unit 16 is set as a sensor, and the delay time switching unit 17 is set without a delay time. In the wireless repeater 2, the reception destination switching unit 16 is set as a sensor, and the delay time switching unit 17 has a delay time, and here is set to 1 second. Even if the delay time is not one second, when the wireless relays 1 and 2 receive the wireless signal from the same sensor and transmit the wireless signal to the receiver 3, It is only necessary that the time 3 has a sufficient time to process the wireless signals from the wireless repeaters 1 and 2 continuously. That is, if the receiver 3 receives two or more radio signals within a certain period of time, the receiver 3 may not be able to process them, and it is only necessary that the receiver 3 can avoid it.
[0026]
FIG. 4 is a diagram illustrating a relationship between a reception state of a wireless signal in the receiving unit 12 and a display state of the first and second display units 14 and 15 in the wireless relay device 1.
[0027]
[Example 1]
The operation of the security system of FIG. 2 will be described. The wireless signal output by the sensor is transmitted to the receiver 3 via the wireless repeaters 1 and 2. In this case, the wireless repeater 2 does not transmit the wireless signal even when receiving the wireless signal from the sensor 10n because the receiving destination switching unit 16 is set to the wireless repeater, and thus a useless wireless signal is generated. There is no fear. In addition, since the wireless relay device 1 does not transmit a wireless signal even when receiving a wireless signal from the wireless relay device 1 because the receiving destination switching unit 16 is set as a sensor, a useless wireless signal may be generated. There is no. Therefore, the receiver 3 can receive only a necessary amount of the radio signal from the sensor 10n, and the reception failure due to the unnecessary radio signal does not occur.
[0028]
In addition, by adopting a simple configuration for switching the receiving destination, a low-cost system that is easy to operate can be realized.
[0029]
[Example 2]
The operation of the security system of FIG. 3 will be described. The wireless signal output from the sensor 10a is transmitted to the receiver 3 via the wireless repeater 1. The wireless signal output from the sensor 10b is transmitted to the receiver 3 via the wireless relay device 2. In this case, the wireless relay device 1 does not transmit a wireless signal even when the wireless switching device 16 receives the wireless signal from the wireless relay device 2 because the receiving destination switching unit 16 is set as a sensor. There is no. In addition, since the wireless relay device 2 does not transmit a wireless signal even when receiving a wireless signal from the wireless relay device 1 because the receiving destination switching unit 16 is set as a sensor, a useless wireless signal may be generated. There is no. Since the delay time switching unit 17 is set to have a delay time, the wireless repeater 2 receives the wireless signal from the sensor 10a or the sensor 10b even if both the wireless repeater 1 and the wireless repeater 2 receive the wireless signal. Since the radio signals to the receiver are transmitted with a time difference, the receiver can process those radio signals.
[0030]
Therefore, the receiver can receive only a necessary amount of radio signals from the sensor, and there is no occurrence of reception failure due to unnecessary radio signals.
[0031]
[Example 3]
FIG. 4 is a diagram illustrating a display displayed on the first display unit 14 and the second display unit 15 of the wireless relay device 1. When the reception test of the wireless repeater 1 is performed, if there is no problem in the reception condition, the display unit 2 is turned on after the display unit 1 is turned on, which is determined as “excellent”. In addition, when the reception state is OK, the first display unit 14 is turned on after the display unit 1 blinks, as "good". Further, when the reception situation is problematic, it is determined as “impossible” and the second display unit 15 blinks after the first display unit 14 blinks. When an interfering radio wave, that is, a radio wave from the outside, is received, both the display units 1 and 2 are made to blink simultaneously. With these arrangements, three or more reception conditions can be expressed even with two display units, and a combination of blinking and lighting makes it possible to use only one color and reduces manufacturing costs.
[0032]
The relationship between the reception status and the first and second display units 14 and 15 is not limited to the present embodiment, and various changes and modifications may be made without departing from the spirit of the claims. It is possible.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the receiving destination switching unit is set to the sensor or the sensor transmitter, the transmitting unit only transmits when the receiving unit receives a wireless signal from the sensor or the sensor transmitter. The wireless signal is transmitted from the wireless relay device, and when the receiving destination switching unit is set to the wireless relay device side, the receiving unit transmits the wireless signal only when the wireless signal is received from another wireless relay device. No radio signal is generated and the receiver does not make a reception mistake. In addition, by adopting a simple configuration for switching the receiving destination, it is possible to realize a low-cost system that is easy to operate.
[0034]
According to the second aspect of the present invention, the wireless signal from the sensor detection signal transmitting means and the wireless signal from another wireless repeater are reliably distinguished and determined.
[0035]
According to the third aspect of the present invention, the time from when the receiving unit receives the wireless signal to when the transmitting unit transmits the wireless signal can be set to two or more types. Even when the device receives a wireless signal from the same sensor and transmits the wireless signal, a reception error does not occur in the receiver.
[Brief description of the drawings]
FIG. 1 is a block diagram of a wireless repeater of the present invention.
FIG. 2 is a diagram showing an example of a security system using the wireless repeater of the present invention.
FIG. 3 is a diagram showing another example of a security system using the wireless repeater of the present invention.
FIG. 4 is a diagram illustrating a display state of a display unit of the wireless relay device.
[Explanation of symbols]
1, 2 wireless repeater 12 receiving unit 13 transmitting unit 14 first display unit 15 second display unit 16 destination switching unit 17 delay time switching unit 18 storage unit 19 determination unit 3 receiver

Claims (3)

In a security system is a wireless repeater installed between the transmission means of the detection signal of the sensor and the receiver,
A receiving unit that receives a wireless signal;
A transmission unit for transmitting a radio signal,
A determination unit that determines whether the received wireless signal is a wireless signal from a transmission unit of a detection signal of the sensor or a wireless signal from another wireless repeater,
When the wireless signal from the wireless signal from the transmission means of the detection signal of the sensor or the wireless signal from the other wireless repeater, when the wireless signal is transmitted from the transmitting unit, a receiving destination switching unit,
The receiving unit is connected to the receiving unit, the transmitting unit, the determining unit, and the receiving destination switching unit, and when the receiving destination switching unit is set to the sensor detecting signal transmitting unit side, the receiving unit transmits a wireless signal from the sensor detecting signal transmitting unit. The wireless signal is transmitted from the transmitting unit only when receiving, and when the receiving destination switching unit is set to the wireless repeater side, the wireless signal is transmitted from the transmitting unit only when the receiving unit receives a wireless signal from another wireless repeater. A wireless repeater, comprising: a control unit for transmitting. The transmitting unit transmits the wireless signal by adding an identification signal to the wireless signal from the sensor detection signal transmitting unit, and thereby the determining unit determines that the wireless signal from the sensor detection signal transmitting unit and another wireless repeater The wireless repeater according to claim 1, wherein a wireless signal from the wireless communication device is determined. 3. The apparatus according to claim 1, further comprising a delay time switching unit configured to set two or more types of time from when the receiving unit receives the wireless signal to when the transmitting unit transmits the wireless signal. The wireless repeater as described.

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