CN202177957U

CN202177957U - Optical fiber conduction foreign matter intrusion monitoring device

Info

Publication number: CN202177957U
Application number: CN201120290043XU
Authority: CN
Inventors: 马强
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-11
Filing date: 2011-08-11
Publication date: 2012-03-28
Anticipated expiration: 2021-08-11

Abstract

The utility model relates to an optical fiber conduction foreign matter intrusion monitoring device which comprises an optical transmitter, an optical receiver and an optical fiber conduction net, wherein the optical transmitter and the optical receiver are arranged indoors, the optical fiber conduction net is arranged outdoors and arranged around a restricted area, the optical transmitter is connected with the optical signal input end of the optical fiber conduction net through a transmitting optical cable, the optical receiver is connected with the optical signal output end of the optical fiber conduction net through a receiving optical cable, and the optical receiver is in drive connection with an alarm device. The optical fiber conduction foreign matter intrusion monitoring device has the benefits that the structure is simple, an outdoor power supply device is not required, the optical fiber conduction foreign matter intrusion monitoring device is not affected by electromagnetic interference, and the working is reliable; when an optical loop is open, the optical receiver does not output signals, and an alarm against foreign matter intrusion is emitted; when the optical loop is closed, the optical receiver outputs the signals, the alarm against the foreign matter intrusion is not emitted, and the normal signals of a system are further outputted.

Description

A kind of fiber optic conduction foreign body intrusion monitoring device

Technical field

The utility model belongs to fiber optic conduction monitoring field, particularly a kind of fiber optic conduction foreign body intrusion monitoring device.

Technical background

The foreign body intrusion system that takes precautions against natural calamities is the important leverage system of high-speed railway traffic safety, has opened in China this system all has been installed in the high-speed railway.The high-speed railway foreign body intrusion system that takes precautions against natural calamities is that, railway slope anti-junk protection parallel to highway crossing railroad bridge, highway and railway and the easy landing of the railway side slope location foreign body intrusion that caves in is monitored; When the foreign matter fouling of clearance gauge; System sends warning message immediately; This information is with pass to row control center simultaneously, and the train parking will be controlled in row control center.

The China Express Railway electrical network is taken precautions against natural calamities the foreign body intrusion system in application process at present, once repeatedly reports by mistake, causes the train of high-speed cruising to stop in emergency, and driving has been caused bigger influence.Through investigating further and studying to the scene; Cause the main cause of this comparatively frequent false alarm to have: 1, the present electrical network that adopts is taken precautions against natural calamities in the foreign body intrusion system schema; Adopted the collection and the transmission mechanism of electric signal, under complex electromagnetic environment, be interfered easily; Form the rub-out signal of transmission line and collector, thereby cause false alarm.2, the stability of on-the-spot power-supply unit is not high, and the disturbance of power supply is to cause the wrong report Another reason.3, to the field data complex disposal process, cause reliability decrease, alarm host machine wrong report output happens occasionally.

Summary of the invention

The purpose of the utility model is to provide a kind of fiber optic conduction foreign body intrusion monitoring device technical scheme; This scheme utilizes the principle of fiber optic conduction that one or several fiber optic conduction nets are set in the limit zone; Mode through the detection of fiber optic conduction light circuit; The realization foreign body intrusion detects, and this device does not have a power-supply device outdoor, does not receive electromagnetic interference (EMI).

To achieve these goals; The technical scheme of the utility model is: a kind of fiber optic conduction foreign body intrusion monitoring device; Comprise and be arranged on indoor optical transmitting set and optical receiver and at the outdoor fiber optic conduction net that is provided with around restricted area; Optical transmitting set is through sending the light signal input end that optical cable connects the fiber optic conduction net, and optical receiver is through receiving the light signal output end that optical cable connects the fiber optic conduction net, and said optical receiver connects an alarm.

Said fiber optic conduction net comprises a bracing frame and the grid net by an optical fiber braiding; The grid net is made up of the square grid of 100mm * 100mm to 115mm * 115mm; Described bracing frame comprises the many root posts that are provided with around restricted area; The optical fiber grid net that braiding is good is fixed on the column, is wound with tinsel around said optical fiber.

The beneficial effect of the utility model is: simple in structure, need not outdoor power-supply device, and do not receive electromagnetic interference (EMI), reliable operation; When light circuit is opened a way, the output of optical receiver no signal, then foreign body intrusion is reported to the police; When light circuit was closed, optical receiver had signal output, and then foreign body intrusion is not reported to the police, and the output system normal signal; Utilize the optical cable in different paths can also realize the redundancy of this apparatus system; Utilize different light pulses to encode and to realize conveniently that multi-region detects and prevent that misconnection detects.

Below in conjunction with accompanying drawing and embodiment the utility model is made a detailed description.

Description of drawings

Fig. 1 is the utility model structural representation.

Embodiment

A kind of fiber optic conduction foreign body intrusion monitoring device embodiment; Referring to Fig. 1; Said fiber optic conduction foreign body intrusion monitoring dress comprises and is arranged on indoor 1 optical transmitting set 2 with optical receiver 3 and at the outdoor fiber optic conduction net 4 that is provided with around restricted area; Optical transmitting set is through sending the light signal input end that optical cable connects the fiber optic conduction net, and optical receiver is through receiving the light signal output end that optical cable connects the fiber optic conduction net, and said optical receiver drives and connects an alarm 5.

The ultimate principle of said fiber optic conduction foreign body intrusion monitoring device: indoor highly reliable optical transmitter sends to outdoor transmission optical fiber 2-1 with laser beam; By send optical fiber with this optical signal transmission to outdoor fiber optic closure 6; Outdoor optical fiber is connected with the fiber optic conduction net 4 light signal input ends that outdoor fiber foreign matter is invaded the limit detection; Light signal transmits the back and arrives the outdoor fiber optic closure 7 of the other end in outdoor fiber optic conduction net; Link to each other with outdoor reception optical fiber 3-1, through arriving room light receiver 3 after the transmission that receives optical fiber.

When above-mentioned light circuit is closed, optical receiver output normal signal, indoor host computer makes YWJ (foreign body intrusion relay) excitation, and the foreign body intrusion alarm is not reported to the police, and display system is in proper working order;

When above-mentioned light circuit breaks off (foreign matter is invaded the fiber optic conduction net causes the fiber optic conduction net to open circuit), the room light receiver does not receive light signal, and optical receiver is exported no signal, and the optical receiver no-output makes YWJ fall, the foreign body intrusion alarm equipment alarm.

Said fiber optic conduction net comprises a bracing frame and the grid net by an optical fiber braiding, and the grid net is made up of the square grid of 100mm * 100mm to 115mm * 115mm, and the grid net is fixed on the bracing frame.Form by the braiding of optical fiber because the fiber optic conduction net is one,, be wound with tinsel around a said optical fiber for the requirement of strength of netting.Increase its physical strength through increasing fine wire, its physical strength satisfies Ministry of Railways's related request, when disconnected fiber optic conduction net is invaded and pounded to foreign matter, causes the light circuit open circuit.Described bracing frame comprises the many root posts that are provided with around restricted area, and the optical fiber grid net that braiding is good is fixed on the column; Perhaps support frame as described above is around restricted area the grid net by metal wire knitted to be set between many root posts and the column, and an optical fiber is attached to along the grid networking and forms the fiber optic conduction net on the tinsel.

Optical transmitting set 2 among the embodiment is present known equipment with optical receiver 3; At high reliability optical transmitter front end, add pulse code information 8, make light signal form the coded signal of break-make at interval; Its objective is that the zone that is used to distinguish the different detection foreign body intrusion is connected inspection with outdoor; When optical receiver receives same pulse code signal, prove that transmitting-receiving is consistent, outdoor optical fiber is connected correctly with detecting to net; When transmitting-receiving is inconsistent, show that then outdoor optical fiber and detection net malunion are true or have foreign body intrusion to report to the police.

Be the raising reliabilty and availability, but this device master-slave redundancy setting, and indoor and outdoor equipment all can adopt two covers, when wherein a cover or two overlaps warning, then is regarded as foreign body intrusion.A host computer system can comprise multichannel foreign body intrusion subregion.The corresponding YWJ of each subregion.

Claims

1. fiber optic conduction foreign body intrusion monitoring device; It is characterized in that; Said device comprises and is arranged on indoor optical transmitting set and optical receiver and at the outdoor fiber optic conduction net that is provided with around restricted area; Optical transmitting set is through sending the light signal input end that optical cable connects the fiber optic conduction net, and optical receiver is through receiving the light signal output end that optical cable connects the fiber optic conduction net, and said optical receiver connects an alarm.

2. a kind of fiber optic conduction foreign body intrusion monitoring device according to claim 1; It is characterized in that; Said fiber optic conduction net comprises a bracing frame and the grid net by an optical fiber braiding, and the grid net is made up of the square grid of 100mm * 100mm to 115mm * 115mm, and support frame as described above comprises the many root posts that are provided with around restricted area; The optical fiber grid net that braiding is good is fixed on the column, is wound with tinsel around said optical fiber.