Break-in detection system

• US 20040257218A1
• Filed: 06/01/2004
• Published: 12/23/2004
• Est. Priority Date: 06/17/2003
• Status: Active Grant

• Current Assignee: Sanki Engineering Company Limited
• Original Assignee: Comsec Corp., Ltd., Hitachi Cable Limited (Proterial Ltd.), Sanki Engineering Company Limited
• Inventors: Tsuchiya, Fumiaki, Nozawa, Toshihiro, Ishi, Shinya, Shibata, Norihiko
• Granted Patent: US 7,068,166 B2
• Time in Patent Office: Days
• US Class Current: 340/522
• CPC Class Codes: G08B 13/124 with the breaking or disturbance being optically detected, e.g. optical fibers in the perimeter fence
• CPC Class Codes: G08B 13/186 using light guides, e.g. optical fibres
• CPC Class Codes: G08B 13/19656 Network used to communicate with a camera, e.g. WAN, LAN, Internet
• CPC Class Codes: G08B 13/19697 Arrangements wherein non-video detectors generate an alarm themselves

Abstract

The object of the invention is to provide a break-in detection system having excellent reliability and maintenance-free characteristics. The detection sensor 1 of FBG type detects an intruder trying to climb over the fence around premises. The detection sensor 2 of OTDR type detects an intruder trying to demolish the fence. A fiber optic cable used as a detection sensor has a sensor core wire and a LAN transmission core wire arranged in parallel to each other to form a LAN transmission channel. Said LAN transmission core wire is used to transmit videotaped image signals from ITV cameras 8 and image control signals two ways between the monitoring room 3 and the ITV control device 6. Said LAN transmission channel is available for connection by IP telephone sets 11, a LAN terminal 12, a wireless LAN terminal 14 and IP-BOX 15 for internet communication.

Claims

1. A break-in detection system for detecting intrusion into a surveillance area comprising an intrusion detection unit;

and a monitoring system incorporating ITV cameras maintained in coordination with said intrusion detection unit, said intrusion detection unit including fibro-optic detection sensor means provided with fiber optic cables laid down in the surveillance area to work as members to detect intrusion signals generated by means of external force exerted thereto and as a transmission channel for said intrusion signals, said intrusion detection unit being adapted to obtain said intrusion signals from said optical fiber cables, each fiber optic cable provided in each fiber optic cable having first and second core wires arranged therein in parallel to each other for signal transmission, said intrusion detection unit being adapted to cause light pulses to enter said first core wire and be reflected in the form of said intrusion signals, said second core wire being incorporated into said monitoring system and adapted to transmit televised image signals from the ITV cameras and image control signals to and from a ITV control system in a monitoring room.

2. A break-in detection system as set forth in claim 1, wherein said ITV control system comprises means for sounding an alarm upon detection of intrusion by said intrusion detection unit;

means for showing the televised image by said ITV cameras; and

means for automatically controlling conditions of images taken by the ITV cameras or manually controlling said conditions on an operating panel.

3. A break-in detection system as set forth in claim 1, wherein said transmission channel is adapted for connection to an IP phone, a LAN terminal, a wireless LAN terminal and at least part of an Internet communication IP-BOX.

4. A break-in detection system as set forth in claim 1, wherein said fiber optic cables of said detection sensor include an FBG type fibro-optic detection sensor means laid down on top of a fence in said surveillance area to detect an intruder who tries to climb over the fence.

5. A break-in detection system as set forth in claim 1, wherein said fiber optic cables include an OTDR type fibro-optic detection sensor laid down in zigzags on the fence to detect an intruder who tries to demolish the fence.