CN2129436Y

CN2129436Y - Alarming device of optical fiber photoconductive circuit

Info

Publication number: CN2129436Y
Application number: CN 92218269
Authority: CN
Inventors: 李爱清
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-06
Filing date: 1992-07-06
Publication date: 1993-04-07
Anticipated expiration: 2002-07-06

Abstract

The utility model relates to the alarming device of an optical fiber photoconductive circuit, which belongs to the technical field of photoelectric warning alarm. The alarming device of an optical fiber photoconductive circuit is characterized in that the optical fiber is formed into a photoconductive circuit with the alarm of a monitoring center after being rounded or directly connected to a ward object; the alarming device of an optical fiber photoconductive circuit sends out an alarm according to the opening and closing of the optical signals in the optical fiber.

Description

Alarming device of optical fiber photoconductive circuit

The utility model belongs to photoelectricity alarm technical field.Specifically, be a kind of with antitheft for the fibre-optic light guide loop alarm device of its fundamental purpose.

At present, anti-theft warning device comprises light, mechanical, electrical and all kinds such as combination.Wherein, belong to the light class as infrared ray alarm device etc. because technology, cost and durable reliability and so on problem is promoted to average family not quite easily.The current return alarm device that another kind belongs to electric class is the same with mechanical alarm device with other electric class, and anti-layman does not prevent the expert.Simple physics knowledge can make it to connect in advance the alarm loop or close its warning horn and achieve the goal.

The utility model adopts the fibre-optic light guide loop to replace the cable current loop at the problem of above-mentioned existence.And obtain warning information by the situation that light path is wherein opened and closed.

The utility model solution:

Fibre-optic light guide loop alarm device, the optical fiber that it is characterized in that diameter enough thin (such as resembling hairline) passes a chain ofly or is directly connected in the object of being nursed by fibre-optical splice, and constitutes the photoconduction loop with the warning horn of central monitoring position such as reception room, neighbourhood committee, security personnel or insurance company.When this nurse object by remote when mobile, must the drawn optical fiber joint or optical fiber cable cut off.And therefore central monitoring position will find that fiber middle light signal interrupts, and give the alarm.

Because the optical fiber in the optical cable loop is thin as hairline, each nurse object not only is wound with the optical fiber of some different frequencies (also can same frequency) light wave, and be wound with more logical light optical fiber, even careful strip off optical cable, to tell wherein all light-conductive optic fibres at short notice and connected exactly, hardly may.

Because the light signal of working in the optical fiber has irregular frequency and pulse, promptly use reflective scissors or luminous scissors to cut off optical cable and also can't guarantee light signal its incision position input or reflection and the synchronous same loop of same frequency that central monitoring position sends.

Advantage of the present utility model:

Be that at first its degree of reliability is relatively very high; And cost is very low.The optical cable that each user only needs to wrap up in a branch of some optical fiber circuits (every loop is made up of some logical light and logical light optical fiber again) leads to central monitoring position can make its all objects obtain nursing; Can also directly be used as door lock uses.

Fig. 1 is several fibre-optical splices commonly used and loop synoptic diagram;

Fig. 2 is a use-case synoptic diagram of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing:

1 is the female type fibre-optical splice among Fig. 1; 2 is the screw fibre-optical splice; 3 is the contact pin type fibre-optical splice; 4 is the reflective base and the plug of coaxial-type fibre-optical splice; 5 indication persons are the optical fiber circuit line; 6 is coaxial-type optical fiber circuit line; Respectively locate to lead to central monitoring position shown in 7.After these joint chains of rings fasten or directly are linked to the high pressure bubble of colour TV among the nurse significant points of object such as Fig. 2 and constitute the photoconduction loop with warning horn, only prenotice central monitoring position drawn optical fiber joint and could under the situation of not destroying and cutting off optical cable, move at a distance and nurse object.

Claims

1, fibre-optic light guide loop alarm device is characterized in that optical fiber cable is walked around and the chain of rings fastens after the nurse object and warning horn constitutes the photoconduction loop.

2, fibre-optic light guide according to claim 1 loop alarm device, the optical fiber cable that it is characterized in that the photoconduction loop also can be that the optical fiber of coaxial-type directly links with the nurse object.