Asphalt pavement continuous vertical deformation monitoring sensor based on optical fiber sensing technology

Abstract

The invention relates to an asphalt pavement continuous vertical deformation monitoring sensor based on an optical fiber sensing technology, and belongs to the technical field of road equipment. The asphalt pavement continuous vertical deformation monitoring sensor is characterized in that the asphalt pavement continuous vertical deformation monitoring sensor is arranged on the bottom portion of an asphalt pavement to be detected, the sensor is placed on a position to be detected after the lower layer of the arrangement layer is pressed and flattened, and then road paving and rolling is directly performed. According to the present invention, the sensor can be used for the static and dynamic loading forms, the spiral steel pipe is close to the road structure layer so as to consequently produce bending deformation, the strain values of each optical fiber grating are real-timely measured, the whole continuous strain curve of the sensor position is fitted by using the polynomial fitting and other methods and by using the optical fiber grating strain values of each discrete point, and the static and dynamic change curve of the road structure layer bottom portion is calculated by using the cross section shape of the curvature strain conversion strip; with the long term data collection, the vertical permanent deformation of the pavement structure can be monitored; and the sensor has effects of low cost, easy use, convenient arrangement, no influence on normal pavement construction, high precision, large measuring range, and capability of testing under the static state and the dynamic state.

Description

technical field [0001] The invention belongs to the technical field of road experiment equipment, and relates to a sensor for monitoring continuous vertical deformation of asphalt pavement based on optical fiber sensing technology. Background technique [0002] Road is an important part of transportation infrastructure. In recent years, my country's road construction investment has accounted for 2%-3% of my country's GDP. But from a global perspective, the early disease problem of roads has never been fundamentally resolved. On the other hand, the impact of road maintenance on road traffic has become more and more unbearable, and it is easy to cause vicious traffic accidents. For a long time, the design of asphalt mixtures at home and abroad has been mainly based on empirical methods. With the increasing requirements for road structures to withstand high traffic volume, heavy loads and long life, the performance of road structures and their damage evolution are becoming mor...

AI Technical Summary

Problems solved by technology

It solves the problem that continuous vertical dynamic and static deformation monitoring of pavement structure is difficult to achieve high precision, high survival rate, low cost, simple layout method and large coverage

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