JPS58201195A - Disaster sensor/remote monitor employing optical transmission technique - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disaster sensing and remote monitoring device using optical transmission technology.

In conventional security systems, electric wires are commonly used to connect crime prevention and disaster prevention sensors and alarm receivers that receive signals emitted by the sensors and display alarms. The connection between the electric wire and the crime prevention and disaster prevention sensor is at the security location detected by the sensor.
Because the method used was to convert abnormal conditions in the property into electrical contact openings and then control the electrical circuit by opening and closing those contacts, it was difficult to avoid electrical contact failures and other malfunctions.

In addition, because electric wires were laid inside and outside security locations and properties, high voltages caused by induced lightning and secondary lightning are induced in the wires, and they become paths for crime prevention, disaster prevention detectors, alarm receivers, and other electrical currents. Damage may have occurred to security system equipment.

Furthermore, electric wires laid for security purposes are electromagnetically coupled to other electrical wiring, electrical machines, and appliances, and the resulting induced electromotive force causes alarm receivers to malfunction.

This invention was made in order to eliminate the above-mentioned drawbacks inherent in the conventional technology. Therefore, the first purpose of this invention is to provide the optical fiber itself with the function of a crime prevention and disaster prevention sensor (second purpose). The purpose of this invention is to improve the reliability of the security system by preventing poor electrical contacts and other malfunctions.

A second object of the present invention is to prevent lightning damage by utilizing the properties of optical fiber, which is an electrical non-conductor, to block the path of lightning current.

A third object of the present invention is to prevent malfunctions of alarm receivers due to electromagnetic induced currents by using the properties of optical fibers that are free from electromagnetic inductive coupling.

In order to achieve the above objectives, the present invention forms an optical transmission path using an optical fiber to transmit light in the visible light region or invisible light region emitted by a light emitting element, and directs the light to any location on the optical transmission path. A crime prevention or disaster prevention sensor with a function of blocking, attenuating, or blinking in a code shape, increasing or decreasing is connected, and one end of the optical transmission path (= irradiating the light generated by the light emitting element and receiving the light at the other end) It is configured by disposing a light-receiving element.

According to the above configuration of the present invention, the alarm signal transmission path and the crime prevention
This increases the reliability of security systems including disaster prevention detectors and alarm receivers, and eliminates the causes of lightning damage or malfunctions, which has high practical value.

Next, preferred embodiments of the present invention will be explained in detail in comparison with conventional techniques.

First, to explain the prior art, FIG. 1 is a diagram showing a conventional remote monitoring device for security purposes similar to the present invention. In this device, the electrical contacts of the crime prevention sensor 11 or the disaster prevention sensor 12 are connected in series or in parallel by an electric wire 13, and the end of the electric wire is connected to an alarm receiver 14.

FIG. 2 is a diagram showing an example of the operating principle. The electrical contacts 21, 22, 23 of the crime prevention/disaster prevention sensor are connected in series by a row of electric wires, and when all the electrical contacts are closed, the input terminals 25 and 26 are electrically connected (the two are short-circuited, transistor The collector of 27 is kept at a high potential, and the output terminal 2
8, a signal representing a normal state is obtained.

When a crime prevention or disaster prevention sensor is activated and one or more of the electrical contacts open, the electrical circuit is unconfigured and the input terminal 25
and 26 is in an open state (=), the collector of transistor 27 changes to a low potential, and a signal indicating an abnormal state is obtained at the output terminal.

FIG. 3 is a diagram showing another example of the operating principle. The electrical contacts 31, 32, and 33 of the crime prevention and disaster prevention sensor are connected in parallel by electric wires as shown in the figure, and when all the electrical contacts are open, the input terminal 35 and the back are electrically open, so that the transistor The emitter of 37 is kept at a high potential and a signal representing the normal state is obtained at the output terminal 38. here,
When a crime prevention or disaster prevention sensor is activated and one or more of its electrical contacts are closed, an electrical circuit is formed, and the input terminals 35 and 36 are almost electrically shorted, so that the emitter of the transistor 37 is at a low potential. , and a signal representing the abnormal state is obtained at the output terminal 38.

FIGS. 4(a), 4(c), and 4(d) are diagrams showing examples of crime prevention and disaster prevention sensors having electrical contacts. In the figure, 41 is a reed switch whose electrical contacts are opened and closed by the approach and separation of permanent magnets, 42 is a reed switch which converts temperature changes into expansion and contraction of a bimetal and the electrical contacts are opened and closed by momentum, and 43 is a reed switch which uses the Doppler effect of microwaves. 44 is a device that receives far-infrared light emitted by the human body and detects changes in intensity to open and close electrical contacts by detecting objects moving within the radio wave distribution range. De-ru.

FIG. 5(a) is a schematic configuration diagram showing a first embodiment of a disaster sensing and remote monitoring device according to the present invention using optical fibers. In the figure, reference number 51 indicates a light source power supply circuit, and this power supply circuit 51 is connected to a light emitting element 52 such as a laser diode or a light emitting diode.
constitutes a part of the optical coupling section 53. Reference numeral 54 denotes an optical fiber, one end of which constitutes an optical coupling portion and forms an optical transmission path for transmitting light in the visible light region or invisible light region emitted by the light emitting element 52. Crime prevention and disaster prevention sensors 55, 56, and 57 having functions of blocking, attenuating, blinking, and increasing/decreasing light in the form of codes are connected to arbitrary locations on the optical fiber 54. The other end of the optical fiber 54 constitutes an optical coupling section 58 together with a light receiving element 59 that receives the light. The output of the light receiving element 59 is processed by an amplifier circuit 51 that amplifies the output of the light receiving element 59 to a required level.
0, the output of the amplifier circuit 510 is connected to an alarm output terminal 513 via a threshold discrimination circuit 511 that discriminates the output of the amplifier circuit 510 into a normal range voltage and an abnormal range voltage, and an alarm processing circuit 512.

Next, to explain the operation of the first embodiment of the present invention, the electrical energy generated in the light source power supply circuit 51 is converted from electricity to light by the light emitting element 52, and the generated visible light or invisible light is converted into light. One end of the optical fiber 54 enters from the coupling part 53, and the crime prevention and disaster prevention detectors 55, 56, 5
7 to reach the other end of the optical fiber M. Here, if one or more of the sensors 55 to 57 detects a disaster and is activated, the light may be blocked, attenuated, or flickered in a code-like manner.
Increases and decreases occur. The light that has reached the other end of the optical fiber 54 is
The light is converted into electrical energy by the light-receiving element 59 of the optical coupling section 58, and is amplified to a required level by the amplifier 510. The electrical output of the amplifier circuit 510 is discriminated by a threshold value discrimination circuit 511 as to whether it is a normal range voltage or an abnormal range voltage, and then inputted to an alarm processing circuit 512, and from the alarm processing circuit 512 to an alarm output terminal 513 (second alarm voltage). Appears as output.

FIG. 5(b) is a schematic configuration diagram showing a second embodiment of the disaster sensing and remote monitoring device according to the present invention. Figure 5(b)
, the right side from the dashed-dotted line AB is shown in FIG.
) is omitted because it is the same as Figure (= put, 5
10 is an amplifier circuit, 514 is a sign discrimination circuit, and 515 is a digital output terminal.

Next, the operation of the second embodiment is similar to that of the first embodiment until the light from the optical fiber 54 is converted from light to electricity in the light receiving element 59 and then amplified by the amplifier 510 and output. The same is true. In this embodiment, the coded electrical signal output from amplifier 510 is processed in code discrimination circuit 514 and appears as a digital output at digital output terminal 515.

FIG. 6 is a diagram showing an example of a crime prevention and disaster prevention sensor using light. The light cut-off type sensor 61 is a sensor that connects and cuts off the optical transmission path by bringing the light plug and the pre-receiver into close contact with each other and separating them, and the light cut-off type sensor 62 is a sensor that is loosely mechanically coupled. , a sensor that is easily separated by tension to interrupt the optical transmission line, and a light-interrupting type sensor 63 that is a sensor whose mechanically weak structural parts are easily severed due to destruction of structures, etc., and interrupts the optical transmission line; The variable light amount sensor 65 acts as an optical path element, and when it reaches a certain temperature, it fuses and cuts off the optical transmission path.The variable light amount sensor 65 acts as an optical path element, and when it reaches a certain temperature, it changes color and transmits light. The code sensor 66, which is a sensor that changes the amount of light C1 passing through the optical path, has a light shielding plate with a digital code scaled on the optical path, and changes the light passing through the optical transmission path by relative movement between the light shielding plate and the optical path. It is a sensor that intermittents or increases and decreases in the form of a digital code.

As mentioned above, this invention has been explained using good examples, but these examples are merely illustrative for explaining this invention, and do not limit this invention. Everything within the scope of the claims.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of this type of remote monitoring device according to the conventional method, Fig. 2 is a diagram showing an example of the operating principle of the conventional device, Fig. 3 is a diagram showing the same principle of operation of the conventional device; 4
Figures (a), (b), (C), and (d) are diagrams showing examples of conventional crime prevention and disaster prevention detectors, and Figure 5 (a) is a first diagram of a disaster detection and remote monitoring device according to the present invention. FIG. 5(b) is a partially omitted block diagram showing a second embodiment of the disaster sensing and remote monitoring device according to the present invention, and FIGS. 6(a) and (b) ). (C) is a diagram showing an example of a crime prevention and disaster prevention sensor using light. 11... Security detector, 12... Disaster prevention sensor, 13...
...Electric wire, 14...Alarm receiver, 21, 22, 23.
...Electrical contact, Sae...Electric wire, 25.26...Input terminal, 27...Transistor, line...Output terminal, 31
, 32, 33... electrical contact, 34... electric wire, 35
, 36... input terminal, 37... transistor, 38
...Output terminal, 41...Permanent magnet, reed switch type security detector, 42...Bimetal type fire detector, 4
3...Microwave Dotsupura type security detector, 44...
Far-infrared light receiving type security sensor, 51... Power supply circuit for light source, 52... Light emitting element, 53... Electric to light conversion coupling unit,
54... Optical fiber, 55, 56.57... Optical application crime prevention, disaster prevention sensor, 58... Optical to electrical conversion optical coupling part, 5
9... Light receiving element, 510... Amplifying circuit, 511...
- Threshold discrimination circuit, 512... Alarm processing circuit, 513.
...Alarm output terminal, 514...Sign discrimination circuit, 515
...Digital output terminal, '61, 62...Light blocking type sensor (light applied security switch (fixed side, movable side)
), 63, 64... Light blocking type sensor (light applied security connector (male, female pair)), 65... Light amount change type sensor (light applied disaster prevention sensor (liquid crystal thermosensitive element 11-fue' child) ), 66... Code sensor (optical connector), 67
...Protective case. Patent Applicant Sogo Security Security Co., Ltd. Agent Patent Attorney Shoji Oikawa 12-8 N17” 12SJ

Claims (3)

[Claims] (1) An optical transmission line that transmits light in the visible or invisible light range emitted by a light-emitting element is formed using an optical fiber, and the light is blocked, attenuated, or flickered in a code-like manner, increasing or decreasing at any point on the optical transmission line. A crime prevention and disaster prevention sensor having a function of Disaster detection and remote monitoring equipment using optical transmission technology. (2) an amplifier circuit that amplifies the output of the light receiving element to a required level; a threshold discrimination circuit that discriminates the output of the amplifier circuit into normal range voltage and abnormal voltage; and an alarm based on the output value of the threshold discrimination circuit. A disaster sensing and remote monitoring device using optical transmission technology according to claim 1, further comprising an alarm processing circuit that generates an alarm. (3) The present invention further includes an amplifier circuit that amplifies the output of the light-receiving element, and a code discrimination circuit that discriminates and processes the code-like output obtained from the amplifier circuit and outputs a digital signal. A disaster sensing and remote monitoring device using optical transmission technology according to claim (1).