Traffic perception and the monitoring device, and traffic perception and monitoring the optical fiber

摘要

Traffic perception and the monitoring device (100), in order the optical fiber (112) with, to introduce consecutive pulse opposite into the input edge of the said fiber, the expedient which is formed (102, 103, 104, 106, 107, 109 and 119) with to have, each of pulse opposite the emission which possesses frequency difference to have 1st and 2nd pulse, 2nd pulse to be delayed delay just vis-a-vis 1st pulse, this device the Rayleigh rear to detect the emission which disperses inside the fiber furthermore, facing toward the input edge, at the same time,Responding to that, in order to form the output signal, it has with the photodetector which is formed. For example as for the device of this invention, the long road (, 5km) paralleling, at optional position it is something which makes the perception and monitoring of traffic possible, when it compares with the system until recently by the technology which actualizes the same spatial resolution installation cost and cost of maintenance per unit length are decreased.