Roaming mobile sensor platform for collecting geo-referenced data and creating thematic maps

摘要

A roaming sensor system collects data on the condition of roads and bridge decks and identifies and maps defects, including cracks, potholes, debonding, tracking, delamination, surface ice, surface water, and rebar corrosion. Data are collected by a vehicle or a fleet of vehicles driven at normal traffic speeds. The vehicle is outfitted with sensors that collect data using acoustic surface waves, ground penetrating radar, mm wave surface radar, and/or video images. The data are transmitted to a control center for analysis and distribution.

主权项

1. A roaming sensor system for mapping roadway surface and subsurface conditions, the system comprising:
a positioning subsystem on a vehicle, wherein the positioning subsystem collects geoposition data of a vehicle as it travels on a roadway; a tire excited acoustic sensor system (TEAS) comprising an array of directional microphones mounted under the vehicle for detecting acoustic waves excited by one or more tires of the vehicle moving over a roadway surface as the vehicle travels on the roadway; and a computer that:
identifies, from the detected acoustic waves, first acoustic waves excited in the air from the tire-road interface,generates roadway surface condition data from the first identified acoustic waves,identifies, from the detected acoustic waves, second acoustic waves radiated from elastic surface waves excited along the roadway surface from the tire-road interface,generates roadway subsurface condition data from the second identified acoustic waves, andcorrelates the geoposition data with the roadway surface condition data and the roadway subsurface condition data and produces a map of the roadway surface and subsurface conditions.