Scanning Capacitive Arrays for Real-Time, In-Situ Imaging of Density and Thickness in HMA Roadways

摘要

HMA density is one of the best predictors of highway durability. This project seeks to leverage JENTEKs novel capacitive sensor array technology, data acquisition instrumentation, inverse methods, and software to enable rapid, wide-area registered imaging of HMA density and thickness. The idea is to measure and analyze the frequency response of the JENTEK sensor at each of many individual locations, using electric fields penetrating to various depths inside and through the HMA, and thereby estimate the permittivity, conductivity, and thickness of the HMA. The observed correlation of permittivity with HMA density should enable the desired density vs. location information.