Patent ID: 7190269
Filing Date: 2007-03-13
Classification: G08B

Abstract:
1. A fiber optic security system comprising: a plurality of optical transmitter module for outputting an optical signal; a plurality of optical transmission line for transmitting the optical signal an end of which connected respectively to said optical transmitter modules; a plurality of optical receiver module for detecting the optical signal connected respectively to the opposite end of said optical transmission lines; and a controller for controlling said optical transmitter modules and said optical receiver modules, discriminating the state of said optical transmission lines respectively by a status signal of the optical signal received from said optical receiver modules; wherein, each of the optical transmitter modules comprises a first connector for receiving signals from said controller which can be connected to a transmitting connector of said controller; a second connector which can be connected to the first connector of a neighboring optical transmitter module; and an optical transmitter which outputs an optical signal according to a control signal from said controller; each of the optical receiver modules comprises a first connector for receiving signals from said controller which can be connected to a receiving connector of said controller; a second connector which can be connected to the first connector of a neighboring optical receiver module; and an optical receiver for receiving an optical signal from the optical transmission line; one of said optical transmitter modules is connected to the transmitting connector of said controller and the others are connected one after another, one of said optical receiver modules is connected to the receiving connector of said controller and the others are connected one after another, said controller provides a data signal and an operation signal to a predetermined optical transmitter module, wherein the data signal is for operating the predetermined optical transmitter module and the operation signal is for operating the optical transmitter of the predetermined optical transmitter module, simultaneously provides the same data signal to an optical receiver module corresponding to the predetermined optical transmitter module and receives a detection signal from the optical receiver module, wherein the same data signal is for controlling the optical receiver module and the detection signal include an information whether the optical receiver module received optical signal from the predetermined optical transmitter module, each of said optical transmitter modules and said optical receiver modules respectively transmits the data signal received from said controller to neighboring optical transmitter module and neighboring optical receiver module in sequence.