SENSING SYSTEM USING OPTICAL FIBER CABLE

Abstract

A sensing system using an optical fiber cable comprises a sensor unit for sensing an external intrusion, a local monitoring controller for receiving a sensing of the sensor unit and a central monitoring controller for controlling the local monitoring controller. The sensing system is reliable, and fewer effects are obtained with respect to an external environment such as a weather condition while achieving an easier installation irrespective of an installation area and an easier maintenance.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become better understood with reference to the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein;

FIG. 1 is a schematic view illustrating the whole construction of a sensing system using an optical fiber cable according to the present invention;

FIG. 2 is a block diagram illustrating a sensing system using an optical fiber cable according to the present invention;

FIG. 3 is a block diagram illustrating an OTDR (Optical Time Domain Reflectometer) unit of FIG. 2;

FIG. 4 is an enlarged view of a sensor fence according to the present invention;

FIG. 5 is a graph of a waveform variation as an optical fiber cable is bent according to the present invention; and

FIG. 6 is a graph of a waveform variation as an optical fiber cable is cut according to the present invention.

Claims

1. In a sensing system which includes a sensor unit for monitoring an external intrusion, a local monitoring controller for receiving a detection of the sensor unit, and a central monitoring controller for controlling the local monitoring controller, a sensing system using an optical fiber cable characterized in that said sensor unit comprises a sensor fence formed in such a manner that one optical fiber is formed in a net shape using a plurality of connection members, and a detection sensor for detecting an external intrusion, and said local monitoring controller comprises a central process unit for processing all data of an inner side and managing a system, a peripheral control unit which is connected with the central process unit for detecting the sensing of the detection sensor of the sensor unit and controlling a camera unit, an alarming unit and a temperature detection unit, an OTDR (Optical Time Domain Reflectometer) unit which is connected with the sensor fence of the sensor unit for detecting a bending and cutting of the optical fiber cable and generating an optical measurement data and alarming data, a communication unit which is connected with the central process unit for transmitting an optical measurement data and alarming data detected or generated by the peripheral control unit and OTDR unit to the central process unit, and a power supply unit which converts an AC into a DC and supplies the DC to each unit.

2. The system of claim 1, wherein said local monitoring controller further comprises a camera unit for photographing a corresponding area in accordance with its control, an alarming unit for generating an alarm, and a temperature detection unit for detecting a surrounding temperature.

3. The system of claim 1, wherein said OTDR unit is connected with an optical connector, and the optical connector is connected with one end of the optical fiber cable of the sensor fence, and the other end of the optical fiber cable is connected with a finishing connector which is connected with the OTDR unit on behalf of the optical connector in an emergency situation.