Aimed at the special demand on the cable locally integrated with the sensor for cable force monitoring

the specific fiber grating strain sensor was designed.The sensor encapsulation assured the survival rates of fiber grating implanted in the cable.The sensor desensitization guaranteed the need of big stress monitoring.Two connected ways between the steel wire and the sensor were researched

which was using the glue and the designed hoop.The two connection ways were tested for the single steel wire tension performance test.From the calibrated force-sensitive coefficients

the practical central wavelength variations of the fiber grating changed within 2 900 pm when the steel wire strain changed 5 000×10-6.The results showed that the sensor design reached the desensitization effect and could meet the need of long-term cable force monitoring.