JPH097084A - Break information repeating system trespass alarm sensor - Google Patents

Abstract

PURPOSE: To lower the cost of an alarm system by constituting a loop, extending to an alarm center, for encoding break information of light signal for every section, and repeating the information by light emission transmission. CONSTITUTION: Sensor poles 2-6 are connected in a loop through an alarm center device 1. For example, the sensor pole 5 receives the light signal from the light emission part 11 of the opposite sensor pole 4 by a light reception part 12, detects the signal by a detection part 13, and sends it to a signal generation part 15. When the light is not cut off between a light emission part 11 and the light reception part 12, a detection signal in the form of a pulse train is outputted, but if the light is cut off, the detection signal is not outputted and a break detection part 3 detects the break state. A signal generation part 15 encodes the light signal in its section according to whether or not there is the light signal. The repeating signal time-division-multiplexes the information in mutually opposite directions in specific order and sends it to the alarm center device 1. Consequently, the place where the light is cut off can be specified and the need to add an interface and a wire to a sensor device for every sensor pole is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intrusion warning sensor for relaying optical information, and more particularly to a large-scale intrusion warning sensor system.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional intrusion warning sensor has a plurality of sensor poles 2 to 6 installed at predetermined intervals.
The number of signals (referred to as "light-interruption signal") indicating the disconnection state of the light beam sent from 6 is taken in by the number of sensors (optical sensors) and these light-interruption signals are monitored. It should be noted that, with reference to FIG. 3, the sensor pole is provided with a light emitting portion and a light receiving portion (sensor) on opposite sides, and between the light emitting portion of one sensor pole and the light receiving portion of another sensor pole adjacent thereto. When the light is blocked, a disconnection signal is output from the other sensor pole to the security center device 1. In addition,
The number of sensors in the sensor pole, the arrangement interval, etc. are set to predetermined values according to the application.

[0003]

In the above-mentioned conventional optical intrusion warning sensor, the disconnection information is taken in by the number of sensors, and a relay device to the security center device is provided for each center pole. Therefore, it is effective to some extent in a system that covers a small area, but in the case of realizing a large-scale system (a surveillance system that monitors a wide area, such as a surveillance system that surrounds an airport site), for example, wiring work In addition, a relay device for transmitting the light interruption signal from the sensor poles 2 to 6 to the security center device 1 is required, which makes the system complicated,
In addition, there is a problem that the cost is increased.

Therefore, the present invention solves the above-mentioned problems and modulates the light-off signal of an intrusion warning sensor installed in a wide area by modulating the light transmission of the sensor to transmit the signal, thereby realizing simplification and cost reduction. The purpose is to provide.

[0005]

To achieve the above object, the present invention provides a disconnection detecting means for receiving an optical signal and detecting the disconnection signal, a signal generating means for encoding the disconnection signal, and the signal. A plurality of sensor poles including a light emitting means that emits light according to the signal output from the generating means, and the last sensor pole receives the optical signal from the light emitting means of the preceding sensor pole and transmits it to a distant place. A disconnection information relay type intrusion warning sensor including means for relaying disconnection information.

In the present invention, preferably, the first-stage sensor pole may be provided with only the light emitting means for outputting an optical signal to the second-stage sensor pole for one light-blocking detection region.

The present invention comprises a light receiving means for receiving an optical signal,
A plurality of sensor poles including disconnection detecting means for detecting a disconnection signal from the light receiving means, signal generating means for encoding the disconnection signal, and light emitting means for emitting light with a signal output from the signal generating means are provided. The plurality of sensor poles are connected in a loop via a center device, and the sensor pole located at an end transmits the output signal of the light receiving means to the center device via a predetermined transmission path. Provided is a disconnection information relay type intrusion warning sensor including:

In the present invention, preferably, the plurality of sensor poles are provided with a pair of a light receiving means and a light emitting means for one light blocking detection area on the side facing the other sensor poles, respectively. Information indicating the presence / absence of a disconnection signal in the light blocking detection area may be time-division multiplexed in two directions, clockwise and counterclockwise.

In the present invention, it is preferable that the center device specifies a place where light is blocked based on a signal transmitted in a clockwise and counterclockwise pair.

[0010]

According to the present invention, disconnection information of an optical signal is encoded and transmitted for each section, and a loop function is provided to a security center with a relay function of converting the disconnection signal into a supervisory signal and transmitting the light. By doing so, it is possible to identify the place where the light is blocked from the counter signal in the time direction and the counterclockwise direction.
As in the conventional example, it is not necessary to attach an interface and wiring to the sensor device for each sensor pole, thereby achieving cost reduction.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a diagram showing the overall configuration of an embodiment of the present invention. FIG. 1B is a diagram showing an internal configuration of each sensor pole. FIG. 2 shows the counterclockwise direction (see FIG. 2A) and the clockwise direction (FIG. 2) that transfer disconnection information to the security center.
It is a signal waveform diagram which shows the transmission format of the relay signal of (B).

With reference to FIG. 1A, in the present embodiment, a plurality of sensor poles 2 to 6 are provided in the security center device 1.
Are connected in a loop form via.

The details of the configuration of the sensor pole in this embodiment will be described below.

With reference to FIG. 1B, for example, the sensor pole 5 receives an optical signal from the light emitting section 11 of the sensor pole 4 facing it by the light receiving section 12.

The detection section (referred to as "disconnection detection section") 13 detects the presence / absence of an optical signal based on the optical detection signal output from the light receiving section 12 and transmits it to the signal generation section 15. When the light is not blocked between the light emitting unit 11 and the light receiving unit 12, for example, a pulse series detection signal is output from the light receiving unit 12 in response to ON / OFF of an optical signal of a predetermined period in the light emitting unit 11. Although it is output, when the light is cut off, the detection signal is not output for the cutoff time, and the disconnection detection unit 3 detects the disconnection state.

The signal generator 15 writes "1" at the time slot position of its own section in the relay signal shown in FIG. 2 when its own section is "with optical signal", and "0" when there is no optical signal. Write (ie encode). The relay signal starts from a predetermined start signal ST, and in the counterclockwise direction, information of A, B, C, and D (see FIG. 1A) is time-division-multiplexed and transmitted in this order, and the clockwise direction Has D ',
The information of C ', B', and A'is time division multiplexed and transmitted in this order.

The light emitting section 14 modulates the light with the relay signal of the signal generating section 15 (for example, light intensity modulation) and sends it to the light receiving section 16 of the opposing sensor pole 6. The signal generation unit 15 modulates the light by changing the bias current of the light emitting unit 14 based on the disconnection information from the disconnection detection unit 13.

The output of the light receiving portion 16 of the sensor pole 6 is input to the transmission portion 17 and transmitted to the security center device 1.
Signal transmission from the transmission unit 17 to the security center device 1 can be performed by various modes such as telephone line, wireless, LAN (local area network), and optical transmission.

Note that, with reference to FIG. 1B, the first-stage sensor pole has only the light-emitting portion 11 that outputs an optical signal to the light-receiving portion 12 to the next-stage sensor pole for one light-blocking detection area. The sensor pole at the final stage, which is provided and outputs a signal to the security center device 1, may be configured to include the light receiving unit 16 and the transmitting unit 17.

Referring to FIG. 1A, each of the plurality of sensor poles 2 to 6 is provided with a pair of a light receiving portion and a light emitting portion for one light blocking detection area on the side facing the other sensor poles. Information indicating the presence / absence of a disconnection signal for one light blocking detection area is configured to be transmitted in two directions, clockwise and counterclockwise, and the time division multiplexed signals from the sensor pole 6 and the sensor pole 2 are transmitted to the security center. Respectively transmitted to the device 1.

With reference to FIG. 1A, the operation of the present embodiment when there is an interruption of the optical signal between the sensor poles 4 and 5 will be described below.

When there is an interruption of the optical signal between the sensor poles 4 and 5, the relay signal received by the security center device 1 side becomes "1, 1, 0, 1" in the clockwise direction. , Counterclockwise is “1,0,1,1”.

Therefore, in the security center device 1, it is possible to know that the light is blocked in the section C between the sensor poles 4 and 5 by judging the position of "0" in both directions. If the optical signal continues to be cut off between the sensor poles 4 and 5, "1,1" is followed clockwise by "0" and counterclockwise is followed by "1". Is followed by "0" and the signal following the disconnection signal is not transmitted, but it is identified from the position of "0" in both directions that the section C is in the disconnection state.

Although the present invention has been described with reference to the above embodiments, the present invention is not limited to the above embodiments, but includes various embodiments according to the principle of the present invention. For example, the light receiving portions or the light emitting portions are not limited to being arranged in a line on the center pole, and it goes without saying that they may be arranged two-dimensionally in a matrix on opposing planes. Further, the disconnection information of a plurality of light blocking detection areas in the sensor pole may be time-division multiplexed transmitted to one channel to the security center device.

[0025]

As described above, according to the present invention,
By relaying the optical disconnection signal and making it a multiplexed signal, it has the effect that there is little disconnection information to be transmitted to the center device, and it is not necessary to attach an interface and wiring to the sensor device for each sensor pole. As compared with the conventional example, there is an effect that the interface can be significantly reduced and simplified, and a large-scale system can be realized while suppressing an increase in cost.

[Brief description of drawings]

FIG. 1A is a diagram showing a configuration of an embodiment of the present invention. (B) is a diagram showing a configuration of a sensor pole in one embodiment of the present invention.

FIG. 2 is a diagram showing a relay signal format.

FIG. 3 is a diagram showing a configuration of a conventional system.

[Explanation of symbols]

 1 Security Center Devices 2-6 Sensor Pole 11, 14 Light Emitting Section 12, 16 Light Receiving Section 13 Disconnection Detecting Section 15 Signal Generating Section ST Start Signal

Claims (5)

[Claims] 1. A disconnection detecting means for receiving an optical signal and detecting the disconnection signal, a signal generating means for encoding the disconnection signal, and a light emitting means for emitting light with a signal output from the signal generating means. It is equipped with a plurality of sensor poles, including the sensor pole in the final stage, and includes a transmission means for receiving the optical signal from the light emitting means of the sensor pole in the previous stage and transmitting it to the distance, and relaying disconnection information. Information relay system intrusion warning sensor. 2. The disconnection information relay system intrusion according to claim 1, wherein the first-stage sensor pole is provided with only a light emitting means for outputting an optical signal to the second-stage sensor pole for one light-blocking detection area. Warning sensor. 3. A light receiving means for receiving an optical signal, a disconnection detecting means for detecting a disconnection signal from the light receiving means, a signal generating means for encoding the disconnection signal, and a signal output from the signal generating means. A plurality of sensor poles including a light emitting means for emitting light, the plurality of sensor poles being connected in a loop through a center device, and the sensor pole located at an end portion of the output signal of the light receiving means. A disconnection information relay type intrusion warning sensor, characterized in that the center device includes transmission means for transmitting data via a predetermined transmission path. 4. Each of the plurality of stages of sensor poles,
A pair of light receiving means and light emitting means is provided for one light blocking detection area on the side facing the other sensor pole, and information indicating the presence or absence of a disconnection signal for the one light blocking detection area is clockwise or counterclockwise. 4. The disconnection information relay type intrusion warning sensor according to claim 1 or 3, which is configured to perform time division multiplex transmission in two directions. 5. The disconnection device according to claim 1 or 3, wherein the center device identifies a place where the light is blocked based on a signal transmitted in a clockwise and counterclockwise pair. Information relay system intrusion warning sensor.