Research On The Test Of Road Rebound Based On Photoelectric Detection Technology

With the rapid development of high-grade highway construction in China,the pavement quality inspection and maintenance works have been paid more attention to.Deflection is one of the main quality index of road,which reflects the pavement strength performance.Pavement deflection is divided into pavement static deflection and dynamic deflection. Pavement static deflection namely pavement rebound deflection is one item of highway pavement construction technical specifiications in China. It is very important to detect pavement rebound deflection fastly,objectly and accurately in paverment constrution and maintenance.This dissertation has studied on the present situation of domestic deflection testing in detail,and proposed the optical imaging method of pavement rebound deflection based on the principle of laser displacement detection.The method can improve the precision.The pavement rebound deflection can be got quickly. In view of the research on the pavement rebound deflection with the laser displacement detection, several tasks have been carried out in this dissertation.Firstly, the several existing various deflection testing methods at home and abroad are descrbed, the detection principle and realization technology are analyzed, advantages and disadvantages are given.Secondly, the optical imaging method of pavement rebound deflection testing based on the principle of laser displacement detection is proposed. The testing method can improve testing precision, the safety of the technician, and detection efficiency greatly, bring great convenience to the testing.Thirdly, the detection devices are developed.The sensor circuit and softwares are designed, the experiments are performed, thismethod is feasibily and practicabily.Finally, the application prospect of this dissertation's research is analysed and the some further study should be made.