INTRUSION POSITION DETECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an intrusion position detection device which can detect an intrusion position inexpensively with high precision. SOLUTION: When an external force by an intrusion act is added to a position A, a polarized wave fluctuation occurs to a light which propagates in the positions A of optical fibers 4a and 4b the polarized wave fluctuation propagates in the optical fibers 4a, 4b and each of them is detected by polarized wave fluctuation detectors 11a and 11b. Then, on the basis of a time difference of timing in which the polarized wave fluctuation is detected at the polarized wave fluctuation detectors 11a and 11b, the position A is detected by a computer 12.