SENSING RANGE LIMITING DEVICE, RECEIVING DEVICE, TRANSMITTING AND RECEIVING DEVICE, OPTICAL FIBER SENSING RANGE LIMITING METHOD, AND RECORDING MEDIUM

摘要

In order to make it possible for optical fiber sensing data within a positional range for which acquisition is undesirable to not be acquired at the original signal stage, an optical fiber sensing range limiting device comprises: a blocking unit that, on the basis of a control signal and for a prescribed period, causes probe light that has been sent to an optical fiber used in optical fiber sensing and has returned from the optical fiber to be blocked from being transmitted to a light detection unit, or causes a detection signal that is detected with respect to the return light to be blocked from being transmitted to a downstream processing unit; and a control unit that outputs the control signal to the blocking unit. The prescribed period includes a period corresponding to the positional range for which acquisition of information from the detection signal is prohibited or for which it is undesirable to acquire said information.