Long-chain nylon composite material sensor for monitoring side inclination of viaduct pier on line

The invention belongs to the technical field of on-line safety monitoring, and particularly relates to a viaduct pier roll on-line monitoring long-chain nylon composite material sensor and a preparation method and a monitoring method thereof. The viaduct pier roll on-line monitoring long-chain nylon composite material sensor comprises a top cover, a base, a stand column, a strain sensitive element and a protective layer. The top cover, the base and the stand columns are connected to form an I-shaped structure. The top cover, the base and the stand columns are made of glass fiber reinforced poly long-chain nylon materials, and the content of glass fibers is not less than 30%. The stand column is of a square dumbbell-shaped cross section structure, two ends are bearing sections, and the middle part is a sensitive section; the strain sensitive element is composed of four uniaxial metal strain gauges, and the four uniaxial metal strain gauges are arranged on the four side faces of the sensitive section respective