Plane sensor used for detecting strain between asphalt road surfaces

Abstract

The invention discloses a plane sensor used for detecting strain between asphalt road surfaces, comprising an elastic element, a sensitive element, a hemispheric protective sleeve, a waterproof adhesive layer and a fixing element, wherein the elastic element is made of a material with similar elastic modulus and asphalt concrete modulus and is subjected to harmonious deformation together with an asphalt mixture; the sensitive element is installed in the middle of the elastic element and can detect the dynamic strain between the asphalt road surfaces; the waterproof adhesive layer is compactly filled in the hemispheric protective sleeve; the fixing element guarantees the harmonious deformation of the elastic element and the detected road surface asphalt mixture and prevents the direction of the elastic element from changing during the detection process; and the sensitive element is a strain rosette composed of three strain gages for detecting the dynamic strains of vehicle driving direction, direction vertical to the vehicle driving direction, and direction having an included angle of 45 degrees respectively with the two directions in real time. The plane sensor has the advantages of simple structure, small volume, low cost, high temperature resistance and high detection sensitivity, and can be used for solving the practical problem that the complex strained condition of strain between asphalt road surfaces can not be accurately and reliably detected in the prior art.

Description

Technical field [0001] The invention belongs to the technical field of research on dynamic mechanical properties of asphalt pavement, and in particular relates to a plane sensor used for detecting interlayer strain of asphalt pavement. Background technique [0002] The existing domestic and foreign asphalt pavement design codes adopt static design methods, which are very different from the mechanical behavior of asphalt pavements under actual traffic loads, and cannot explain many early failure phenomena in current road traffic. The conversion of asphalt pavement design methods from static design to dynamic design is an effective way to solve this problem, and it is also one of the focuses of the work of researchers in road circles at home and abroad. To realize the transformation of asphalt pavement design method from static design to dynamic design, firstly, we should thoroughly study the dynamic mechanical behavior of asphalt pavement structure under actual traffic load. Using...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a planar sensor for detecting interlayer strain of asphalt pavement in view of the deficiencies in the above-mentioned prior art, which has a simple structure, small volume, low cost, hi

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