Patent ID: 9134358
Filing Date: 2015-09-15
Classification: B60L,G01M,G01N,G01R,G05B,H02G

Abstract:
1. A monitor that determines an operation condition of at least one cable that suffers at least one of bending or twisting and constitutes an electrical loop, comprising: a test electrical signal generator that generates a test electrical signal and injects the test electrical signal into a first point of the at least one cable; a test electrical signal filter that extracts the injected test electrical signal from a second point of the at least one cable; and a comparator that compares a predetermined threshold with a difference between an electrical state of the injected test electrical signal and the extracted test electrical signal, producing a warning signal indicating cable fatigue in response to the difference exceeding the predetermined threshold; wherein: the test electrical signal is set at a first frequency; a center frequency of the test electrical signal filter is set at the first frequency; the electrical loop carries a working load dispersed on a predetermined spectrum; and a component of the working load at the first frequency is less than a component of the test electrical signal at the first frequency.