JPH066310A - Optical space communication system - Google Patents

Abstract

PURPOSE:To utilize a detection means for an intruder utilizing a light for an information communication means as necessary by using a switching means to implement the communication of a signal utilizing the light and the detection of the intruder. CONSTITUTION:When time card information from a time card information output device 13 is sent to a signal transmitter-receiver 4 serving also as an intruder sensor via a wired line 15 at daytime, the information is converted into an optical signal. Then the optical signal is made incident on the intruder sensor and signal transmitter-receiver 7 via adjacent intruder sensor and signal transmitter-receivers 5, 6. The optical signal received by the transmitter-receiver 7 is converted into an electric signal and sent to an information collecting device 12 via a wired line. When the function of a monitoring center 11 is switched at night, an electric signal used for sensing an intruder is inputted from the center 11 to the intruder sensor and the signal transmitter-receiver 1, by which the signal is converted into an optical signal. The optical signal is returned to the transmitter-receiver 1 via the intruder sensor and signal transmitter-receivers 2-10 to form an optical signal loop.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical space communication system capable of communicating signals in space using light such as infrared rays and detecting intruders.

[0002]

2. Description of the Related Art Generally, a method of using radio waves is known as a method of wirelessly communicating signals. However, radio communication using radio waves is subject to regulations of the Radio Law, and radio waves are allocated for new purposes. Is difficult to obtain.
Therefore, as a method for performing wireless communication without a license, an optical space transmission device using infrared light is considered, and is used in various intrusion detection systems and the like. However, in the past, the above-described optical space transmission device and the intrusion detection sensor existed as independent devices, respectively, and were useless when there was no need to detect an intruder during daytime work.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is an optical space communication system in which an intruder detection means using light is used as an information communication means as needed. Is to provide.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, a feature of the present invention is to provide various optical space communication systems that use light to communicate signals in space and detect intruders. A plurality of intrusion sensors / signal transceivers having a function of transmitting information as an optical signal and a function of detecting interruption of an optical signal by an intruder are provided, and a predetermined one of the plurality of intrusion sensors / signal transceivers is provided. A means for communicating the information, a means for detecting an intruder, and a means for switching the transmission function and the optical signal interruption detecting function are connected to an object, and the signal communication using the light is performed by the switching means. And detecting an intruder, performing the intruder detection means and the switching means from one monitoring center, and an outside line of a predetermined one of the plurality of intrusion sensors / signal transceivers. A relay function is provided by connecting the above-mentioned communication means and intruder detection means to the output terminal, and directly connecting the outside line output terminal and outside line input terminal of the other intrusion sensor / signal transceiver. The above-mentioned intrusion sensor and signal transmitter / receiver are arranged in a ring shape, and an optical space that uses light to communicate signals in the space and also detects intruders In an intrusion sensor / signal transmitter / receiver used in a communication system, an optical signal is input, the optical signal is converted into an electric signal and output from an external line output terminal, and an electric signal from the external line input terminal is converted into an optical signal. In addition to the above, it is configured to detect the interruption of the input optical signal by an intruder and to output from the outside line output terminal.

[0005]

According to the above-mentioned structure, in one system, it is possible to switch between communication of signals in space using light and detection of an intruder.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The optical space communication system of the present invention will be described in detail below with reference to the embodiments shown in the drawings. Figure 1
FIG. 1 is a diagram showing one configuration of a system of an optical space communication system implementing the present invention. This optical space communication system can execute a function of transmitting an optical signal in space and a function of detecting interruption of an optical signal by an intruder at the same time or by switching as described later.

In the embodiment shown in FIG. 1, a plurality of intrusion sensors and signals are arranged around the building A in a ring shape to form a ring-shaped optical communication path B by mutually performing optical communication by infrared rays. Machines 1 to 10, a time card information output device 13 arranged near the entrance of the building A for outputting time card information of employees in the building A to the optical communication path B, and the optical device. An information collecting device 12 for collecting information on the communication path B, and the optical communication path B
Through the intrusion sensor / signal transmitter / receiver 1 to 10 and the time card information output device 1
3 and a monitoring center 11 for monitoring according to the information sent from the information collecting device 12,
Between the monitoring center 11 and the intrusion sensor / signal transmitter / receiver 1, between the information collecting device 12 and the intrusion sensor / signal transmitter / receiver 7, and between the time card information output device 13 and the intrusion sensor / signal transmitter / receiver. Wires are connected to the machine 4. The monitoring center 11 is configured to switch between a state of monitoring intrusion detection and a state of monitoring information such as a time card in the system.

Next, the intrusion sensor / signal transmitter / receivers 1 to 10 will be described with reference to FIG. The intrusion sensor / signal transmitters / receivers 1 to 10 have basically the same configuration, and the connection methods are different as will be described later, so only one will be described. Figure 2
FIG. 3 is an internal configuration diagram of a typical example of the intrusion sensor / signal transmitter / receiver. As shown in FIG. 2, the intrusion sensor / signal transmitter / receiver is roughly divided into a reception function unit 20 and a transmission function unit 2.
1, the receiving function unit 20 includes a condenser lens 23 for condensing an input modulated optical signal from another intrusion sensor / signal transmitter / receiver as indicated by an arrow C, and the condenser lens. 23. A light receiving section 25 configured by a PD (photodiode) or the like for receiving the modulated light signal from 23, and an O / E conversion section for converting the modulated light signal received by the light receiving section 25 into a modulated electric signal. 27 and the O / E converter 27
And the O / E conversion to detect an intruder into the building A, as well as to demodulate the modulated electric signal from the above and to convert into a plurality of parallel electric signals by serial / parallel conversion. The modulated electric signal from the unit 27 is input, the interruption of the optical signal is detected by the modulated electric signal, and the reception level disconnection detection for relaying the optical signal disconnection detection signal from the other reception level disconnection detection unit 31 is performed. Part 31
And an external line output terminal 33 for outputting a plurality of parallel electrical signals from the multiplex transmission / reception unit 29 and an optical signal disconnection detection signal from the reception level disconnection detection unit 31.

Then, the transmission function section 21 is an outside line input terminal for inputting an electric signal from the outside line output terminal 31 and / or an information electric signal from the time card information output device 13 and the information collecting device 12 as described later. 35
And multiplex transmission for modulating with a plurality of parallel electric signals from the external line input terminal 35 and an optical signal disconnection detection signal from the reception level disconnection detection unit 31 and converting into a serial serial signal by parallel / serial conversion. Transmitter 37
An E / O conversion unit 39 for converting the modulated electric signal from the multiplex transmission / transmission unit 37 into a modulated optical signal;
In order to emit light in accordance with the modulated light signal from the O conversion unit 39, a light emitting unit 41 configured by an LD or the like and an optical signal from the light emitting unit 41 are collected and another intrusion sensor / signal transmission / reception is performed as indicated by an arrow D. And a condenser lens 43 for outputting to the machine.

Next, the connection state of the intrusion sensor / signal transmitter / receiver having the above-described structure will be described. In FIG. 1, the intrusion sensor / signal transmitter / receiver 2, 3, 5, 6, 8,
Since each of 9 and 10 has a relay function, an outside line output terminal 33 for outputting a plurality of parallel electric signals from the multiplex transmission receiving unit 29 and an outside line input terminal 35 are directly connected to each other, and also serves as an intrusion sensor. In the signal transmitter / receiver 1, the external line output terminal 33 for outputting the parallel plural electric signals from the multiplex transmission reception unit 29 and the optical signal disconnection detection signal from the reception level disconnection detection unit 31 and the monitoring center 11 are wired 14. In addition to being connected, the monitoring center 11 and its external line input terminal 35 are connected by a wire 14.

Further, the intrusion sensor / signal transmitter / receiver 4 is
The outside line output terminal 33 for outputting parallel plural electric signals from the multiplex transmission / receiving unit 29 and the outside line input terminal 35 are directly connected, and the outside line input terminal 35 and the time card information output device 13 are wired. Connected at 15. In addition, in the intrusion sensor / signal transmitter / receiver 7, the outside line output terminal 33 for outputting the parallel plural electric signals from the multiplex transmission / reception unit 29 and the above-mentioned information collecting device 12 are connected by the wire 16, and the outside line input is made. The terminal 35 and the information collecting device 12 are connected by a wire 16.

The connection state of the intrusion sensor / signal transmitter / receiver can be variously changed according to the needs of the system. For example, the outside line input terminal 35 of the intrusion sensor / signal transmitter / receiver 2 can be further changed. , The output terminal of the computer terminal E is connected, the external line output terminal 33 of the intrusion sensor / signal transmitter / receiver 5 is further connected to the input terminal of another computer terminal F, and the computer is connected via the optical communication path B. It is also possible to transmit the information signal from the terminal E to the computer terminal F.

Next, the operation of the optical space communication system having the above configuration will be described. In the optical space communication system of this embodiment, the time card information output device 1 is used during the daytime.
3 and a system for transmitting time card information and the like from the information collecting device 12 to the monitoring center 11 and a system for detecting an intruder at night, and the switching is performed by the monitoring center 11. First, the operation when the above-mentioned optical space communication system is a transmission system will be described. When the time card information from the time card information output device 13 is sent to the outside line input terminal 35 of the intrusion sensor / signal transmitter / receiver 4 via the wire 15, the time card information is transmitted by the multiplex transmission transmitter 37. It is modulated, converted into a serial signal, and then converted into an optical signal by the E / O converter 39. Then, the optical signal is emitted by the light emitting unit 41 and is sent to the adjacent intrusion sensor / signal transceiver 5 via the condenser lens 43.

Since the intrusion sensor / signal transceivers 5 and 6 have the relay function as described above, the same optical signal as the output optical signal from the intrusion sensor / signal transceiver 4 is the intrusion sensor / signal. It is output from the transceiver 6. The optical signal from the intrusion sensor / signal transmitter / receiver 6 is collected by the focusing lens 23 of the intrusion sensor / signal transmitter / receiver 7.
Is incident on the light receiving section 25. The modulated optical signal received by the light receiving unit 25 is transmitted to the O / E conversion unit 2
Converted into a modulated electric signal by 7, and the multiplex transmission reception unit 2
It is demodulated by 9 and converted into a parallel electric signal. The parallel electric signal from the multiplex transmission / reception unit 29 is sent to the external line output terminal 33, and the wired line 1 is output from the external line output terminal 33.
The data is sent to the information collecting device 12 via 6 and the information is collected (memory).

Next, the information signals such as the time card information collected by the information collecting device 12 are sent to the outside line input terminal 35 of the intrusion sensor / signal transmitter / receiver 7 through the wire 16, and the outside line input terminal thereof. The parallel electric signal such as the time card information input to the signal 35 is modulated by the multiplex transmission part 37, converted into a serial signal, and E /
The light is converted into an optical signal by the O conversion unit 39, emitted by the light emitting unit 41, and sent to the adjacent intrusion sensor / signal transmitter / receiver 8 via the condenser lens 43. The intrusion sensor and signal transmitter / receiver 8, 9 and 10 are
Since it has a relay function, the same optical signal as the output optical signal from the intrusion sensor / signal transceiver 7 is output from the intrusion sensor / signal transceiver 10.

The output optical signal from the intrusion sensor / signal transmitter / receiver 10 is input to the intrusion sensor / signal transmitter / receiver 1 and processed in the same manner as in the case of the intrusion sensor / signal transmitter / receiver 7 described above to generate a parallel electrical signal. Then, the data is input to the monitoring center 11 via the external line output terminal 33 and the wire 14, and the monitoring center 11 performs monitoring (that is, management processing) based on the time card information. As described above, in this system state, information transmission can be achieved.

Next, at night, the above-mentioned monitoring center 11
The operation will be described in a state in which the functions of (1) are switched and the optical space communication system serves as an intruder detection system. First, when the function of the monitoring center 11 is switched, a continuous electric signal of a constant level for detecting an intruder is sent from the monitoring center 11 to the outside line input terminal 35 of the intrusion sensor / signal transmitter / receiver 1 by wire 14.
Be entered via. The continuous parallel electric signal having a constant level input to the external line input terminal 35 is transmitted by the multiplex transmission transmitter 3.
7 modulated, converted into serial signal, E / O
It is converted into an optical signal by the conversion unit 39, emitted by the light emitting unit 41, and sent to the adjacent intrusion sensor / signal transmitter / receiver 2 via the condenser lens 43. The continuous optical signals sent to the intrusion sensor / signal transceiver 2 are the intrusion sensor / signal transceivers 2, 3, 4, 5, 6, 7, 8, 9,
And 10 are relayed to return to the intrusion sensor / signal transmitter / receiver 1 to form an annular optical signal loop.

Here, for example, if an intruder passes between the intrusion sensor / signal transmitter / receiver 7 and 8, the continuous optical signal is interrupted, and the interruption of the optical signal is caused by the intrusion sensor / signal transmitter / receiver. Reception level disconnection detector 3 of machine 8
Detected by 1. Optical signal disconnection detection signal from the reception level disconnection detection section 31 (alarm signal with a special signal)
Is directly sent to the multiplex transmission / transmission unit 37, modulated by the multiplex transmission / transmission unit 37, converted into a serial signal, and
The light is converted into an optical signal by the / O converter 39, and the light emitting unit 41
The light is emitted by and is sent to the adjacent intrusion sensor / signal transmitter / receiver 9 via the condenser lens 43. The optical signal (optical signal disconnection detection signal) input to the intrusion sensor / signal transmitter / receiver 9 passes through the condenser lens 23, the light receiving unit 25, and the O / E conversion unit 27, and the reception level disconnection detection unit 31 thereof.
Is directly input to the multiplex transmission transmitter 37 as an optical signal loss detection signal. After that, an optical signal is sent to the adjacent intrusion sensor / signal transmitter / receiver 10 similarly to the case of the intrusion sensor / signal transmitter / receiver 8.
The optical signal (optical signal disconnection detection signal) is similarly sent to the intrusion sensor / signal transceiver 10 from the intrusion sensor / signal transceiver 1 from the reception level disconnection detection unit 31 of the intrusion sensor / signal transceiver 1 to the outside line output terminal 33 and It is sent to the monitoring center 11 via the wire 14. The monitoring center 11 is configured to perform an alarm operation when the optical signal disconnection detection signal is input. That is, as described above, an intruder can be alerted in this system state.

In this embodiment, a plurality of intrusion sensors and signal transmitters / receivers are arranged in a ring shape, but the present invention is not limited to this, and is linear or other shape. The same effect can be obtained even if it is formed.

[0020]

As described above, according to the present invention, an optical signal is input, the optical signal is converted into an electrical signal and output from the external line output terminal, and the electrical signal from the external line input terminal is output as the optical signal. A plurality of intrusion sensors and signal transmitters / receivers, which convert the output into an output signal and detect interruption of the input optical signal by an intruder and output from the outside line output terminal, are arranged adjacent to each other in a ring shape. Connect a device that performs communication and a device that detects intruders to the external line input / output terminal of a predetermined one of the sensor / signal transceiver, and connect the external line output terminal and external line input terminal of the other intrusion sensor / signal transceiver. Since the optical space communication system is formed by directly connecting and, light can be used to communicate signals in the space and also to detect an intruder.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an optical space communication system embodying the present invention.

FIG. 2 is an internal configuration diagram of the intrusion sensor / signal transmitter / receiver shown in FIG.

[Explanation of symbols]

1 to 10 intrusion sensor / signal transmitter / receiver, 11 monitoring center, 12 information collecting device,
13 information output device, 14 to 16 wired,
20 receiving function unit, 21 transmitting function unit,
23,43 Focusing lens,
25 light receiving part, 27 O
/ E conversion unit, 29 multiplex transmission reception unit,
31 reception level disconnection detector, 33 external line output terminal,
35 external line input terminal, 37 multiplex transmission / transmission unit, 39 E / O conversion unit, 41 light emitting unit,

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04B 10/08 H04Q 1/30 G 9076-5K

Claims (5)

[Claims] 1. A function of transmitting various kinds of information as an optical signal and an optical signal by an intruder in an optical space communication system which uses light to communicate a signal in space and also detects an intruder. A plurality of intrusion sensors / signal transmitters / receivers having a function of detecting interruption of the information are provided, and means for communicating the information to a predetermined one of the plurality of intrusion sensors / signal transmitters / receivers, detection of an intruder And a means for switching between the transmission function and the optical signal interruption detection function are respectively connected, and the switching means performs signal communication using the light and intruder detection. Communications system. 2. The optical space communication system according to claim 1, wherein the intruder detecting means and the switching means are performed from one monitoring center. 3. The intrusion sensor / signal transmitter / receiver is connected to the external line input / output terminal of a predetermined one, and the communication means and the intruder detection means are connected to the outside line input / output terminals. The optical space communication system according to claim 1 or 2, wherein an external line output terminal and an external line input terminal of the signal transceiver are directly connected to each other so as to have a relay function. 4. The intrusion sensor / signal transmitter / receiver is arranged in a ring shape.
Or the optical space communication system according to item 3. 5. An intrusion sensor / signal transmitter / receiver used in an optical space communication system for performing signal communication in space using light and also detecting an intruder, inputting an optical signal, The optical signal is converted to an electrical signal and output from the outside line output terminal, and the electrical signal from the outside line input terminal is converted to and output as an optical signal, and the outside line output is performed by detecting interruption of the input optical signal by an intruder. An intrusion sensor and signal transmitter / receiver characterized by being configured to output from a terminal.