Sensor for detecting dynamic response of asphalt pavement
A dynamic response, asphalt pavement technology, applied in the direction of instruments, roads, roads, etc., can solve the problems of high detection sensitivity and low cost, and achieve the effects of high sensitivity, low cost, and strong anti-noise ability.
Inactive Publication Date: 2011-01-26
CHANGAN UNIV
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a sensor for detecting the dynamic response of asphalt pavement, which has a simple structure, small volume, low cost and high detection sensitivity, and can effectively solve the problem of existing asphalt pavement. Various practical problems in the process of pavement dynamic response detection
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[0032] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, the present invention includes an "I"-shaped structure composed of an elastic element 1 and two fixing elements 2 respectively installed at both ends of the elastic element 1, which is arranged in the middle of the elastic element 1 and detects the dynamic response of the tested asphalt pavement in real time. Sensitive element 3, and a protective casing set in the middle of elastic element 1 and used to protect sensitive element 3 from asphalt mixture damage during construction. The sensitive element 3 is a strain gauge. In this example, the strain gauges are mounted on the elastic element 1 .
[0033] The elastic element 1 is made of a material whose modulus of elasticity is close to that of asphalt concrete, and is a cylindrical rod capable of transmitting the deformation of the tested asphalt concrete material. The fixed element 2 is an end rod that ensures the coordinated deformation of the elastic...
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Abstract
The invention discloses a sensor for detecting the dynamic response of an asphalt pavement, comprising a lying H shape which is composed of an elastic element and fixing elements arranged at the two ends of the elastic element, a sensitive element, namely a strain foil, which is arranged at the middle part of the elastic element and used for carrying out real-time detection on the dynamic responseof detected asphalt pavement, and a protective casing which is sheathed at the middle part of the elastic element and used for protecting the sensitive element from being damaged by asphalt concretematerial of the outer detected asphalt pavement; the elastic element is a column post which is manufactured by material with the elastic modulus similar to the asphalt concrete modulus and can transfer the deformation of the asphalt concrete material of the detected pavement; and the fixing element is an end post which guarantees the elastic element to coordinate with the deformation of the asphalt concrete material of the detected pavement and prevents the sensitive element from changing direction with the elastic element during the detection. The invention has simple structure, small volume,low cost and high detection sensitivity, and can effectively solve the various practical problems existing in the current asphalt pavement dynamic response detection process.
Description
technical field [0001] The invention relates to the technical field of research on the dynamic response of asphalt pavement under moving loads, in particular to a sensor for detecting the dynamic response of asphalt pavement. Background technique [0002] The dynamic response of asphalt pavement under moving load is a research hotspot in the international road field. It is a necessary condition to solve and explain the serious early failure and rutting of existing pavement, and it is the basis for the transformation of pavement structure from static design to dynamic design. . Using embedded sensors to study the stress and strain of asphalt pavement under actual traffic load is an effective means to study the dynamic response of pavement structures. However, due to the complex and harsh conditions of pavement construction, the sensors used for this research are still blank in China. Therefore, the research and development of practical and feasible sensors is the key to the ...
Claims
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IPC IPC(8): E01C23/01G01B7/16G01N27/00
Inventor 吕彭民董忠红
Owner CHANGAN UNIV