Patent ID: 11634881

Abstract:
The disclosure provides a bridge foundation scouring monitoring sensor and a monitoring data analysis method thereof. The disclosed sensor comprises a cover plate, a bottom fixing unit and several standard scouring depth monitoring units fixedly disposed between the cover plate and the bottom fixing unit. Each standard scouring depth monitoring unit comprises an optical fiber vibration string (OFVS) and a supporting frame; the two ends of the OFVS are fixedly connected with the supporting frame; a plurality of polyhedral mass blocks are evenly distributed on the OFBS from top to bottom; and a fiber Bragg grating sensor is disposed at the upper portion of OFBS. The variation of scour depth of bridge foundation induces the change of vibration frequency of the OFVS, which is measured by the fiber Bragg grating sensor. The method of calculating the scour depth from the measured vibration frequency of the OFVS is disclosed.