A Fiber optic bolt loosening monitoring system and method

摘要

Provided are a fiber optic system and method for monitoring loosening of a bolt. According to an embodiment of the present invention, a system for monitoring loosening of a bolt includes a fiber optic line having at least one bolt loosening sensing node installed on each of one or more bolts; and an optical measuring device detecting the loosening of the bolts by applying optical pulses to the fiber optic line and tracing the decrease of the received light, thereby regularly monitoring fastening of multiple bolts and quantitatively measuring the degree of loosening.