JPS5947695A - Alarm transmission system using optical fiber - 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 utilizes a crime prevention and disaster prevention report transmission line using optical fibers (~, which can identify all abnormalities detected among several abnormality detectors (hereinafter referred to as sensing pins)). This article relates to a system for transmitting information using optical fibers.

Conventionally, the method for reporting all abnormal situations such as intrusion or fire has been to connect sensors, etc. installed at necessary locations with a control circuit, and connect them to control equipment or pipes. The method of tying the WIVC had drawbacks such as restrictions on its use in places where there was a flammable atmosphere. In addition, in order to identify which one of the multiple sensing 2Hs has activated, it is necessary to use a complicated trace (BFi force formula), which increases the manufacturing cost and the cost. was.

The present invention was made to eliminate the above-mentioned drawbacks (c-1911) of the conventional ones, and it is possible to
] Continue to pay! 1 In each of the light attenuation elements (41 years old Δ&detector), the light receiving device 1 〆 2 at the end of the optical fiber 7 eyes ν light intensity 'e tt411 'Fl
'L, To provide an alarm transmission method using fiber optics to identify all the sensors that have detected an abnormality by ascertaining the light attenuation factor that has passed according to the light intensity level. It is said that

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to all drawings.

Figure 1 shows the principle of the present invention, in which 1 is a light emitting device including all light emitting diodes, 2 is a light emitting device that transmits light.
C fiber, 3.51, is a sensor for detecting abnormal sounds, and is equipped with optical attenuation elements 4 and 6 each having a transmittance that moves to a position where the optical path ff is blocked depending on whether it is normal or abnormal.-C There is. Note that the transmittances of both are different from each other. 7 is a tr light receiving device including a photodiode, which is a device for identifying the received light intensity; 8 is a 7〈information device, which is a device for identifying the received light intensity;
It is connected to the above-mentioned light reception intensity 1 and is configured to issue an h alarm in response to a change in the PI'r constant. In addition, the first
Figure (A) shows the normal state in which the principle of the present invention operates, and (B)
) indicates an abnormal state when the sensor 3 detects an abnormality.

First, in the above principle configuration, if the light emitting device 1 and the light receiving fiber 2 are injected into the light receiving fiber 2, if both the sensors 3 and 5 are in a normal state VC, the light is received through the entire optical fiber 2, as shown in Fig. m1 (A). The light enters the device 7. In this case, the transmission loss is mainly due to the optical fiber mentioned above. 2 VC, and the above sensor 3. There are two types of optical attenuation elements 4 and 6 that are placed in the st optical path and moved to the lid so that the light attenuating elements 4 and 6 block the B path.

-Sword, upper h], interlocked with optical attenuation element 4 (~1 sensor 3
detected some abnormality and moved to the first riot.
As shown in (B), the upper h-pi optical attenuation element 4 moves to allow the light 'fLR' from the optical fiber to pass through the optical attenuation element 4 and enter the optical fiber leading to the next sensor 5Vc. At this time, if the light intensity attenuated by the light receiving device 7 when the light passes through the light attenuating element 4 of the sensor 3 is known in advance, the operating amount of the sensor 3 can be identified by the light receiving device 7. .

Next, an embodiment 1r of the present invention will be described with reference to FIG.

FIG. 2 is a configuration diagram showing an embodiment of the present invention, in which the same reference numerals as in FIG. 1 indicate the same or equivalent parts,
I will omit the detailed explanation.

In the figure, numerals 9 to 13 are sensors including optical attenuator 5 elements each having a different transmittance. In this example, the activation of the five sensors 9-13 can be identified. That is, the light attenuating element having a unique transmittance, which is one of the sensors 9 to 13 that detected an abnormality, moves to a position where it blocks the optical path, and the light attenuating element (not shown) is completely passed through. Additionally, the light intensity measured by the light receiving device 7 changes, and the light attenuating element that has passed can be identified based on the light intensity level, and as a result, the sensor that has detected the abnormality can be identified.

As described above, according to the present invention, the handling of the transmission line is easier compared to the conventional one in which electric wires are stretched around, and the movement of the optical attenuation element can be easily performed by physical operations such as opening and closing doors and windows. Therefore, there are many advantages such as no need for a power supply in the transmission line. In addition, the ability to easily and inexpensively identify the simultaneous operation of multiple detectors using an alarm transmission system is extremely effective for security, especially in terms of shortening response time, as it allows for quick and reliable identification of the location of an abnormality. Yes, it has great practical effects.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the principle of the present invention, and Fig. 1 (B) shows the normal state and Fig. 1 (B) shows the abnormal state, that is, the case where the tip j53 detects an abnormality. FIGS. 1 and 2 are configuration diagrams showing one embodiment of the present invention. 1... Light emitting device, 2... Optical fiber/6.3, 9~1
: U... Sensor, 4, 6... Optical attenuation element, 5
...Quick point] 7 Bell, 7... Light receiving device, 8... Four-axis device. Patent applicant: Sogo Kobi Security Co., Ltd.

Claims (1)

[Claims] (1) A plurality of abnormality detection systems 2 in which light zone-shaped elements each having a different transmission failure are inserted into an optical closed circuit formed by connecting a light emitting device 6 and a light receiving device with an optical fiber.
In an n-axis transmission system that includes an optical fiber connected in series with a def-information core, an abnormality is generated. Blocking H
1 to 1 + 1, directly move I (υ and receive light to the above light receiving device dera °) II. Total change, depending on the amount of change, multiple connected 15 shi: Of the sensors activated, R, "ζ" is identified and generated in the middle of f't'.
'lf message transmission method.