ROAD SURFACE PROPERTY MEASUREMENT DEVICE AND ROAD SURFACE PROPERTY MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a road surface property measurement system which, when calculating a road surface profile using acceleration data, improves the accuracy of specifying the position of a vehicle.SOLUTION: Provided is a road surface property measurement system comprising a measurement unit for acquiring the position data and acceleration data of a vehicle while the vehicle is traveling, and a road surface property measurement unit for measuring road surface properties on the basis of the position data and acceleration data acquired from the measurement unit. The road surface measurement unit calculates, on the basis of the acquired position data and acceleration data, a road surface index indicating road surface properties of a section which the vehicle has traveled along; stores, in correspondence to each lane, each of previously measured road surface indices that are the road surface indices of a plurality of lanes in a section that were measured in the past; compares the calculated road surface index with the previously measured road surface index of a section corresponding to the section for which the road surface index is calculated; and specifies the lane corresponding to the previously measured road surface index that resembles the calculated road surface index as a lane which the vehicle has traveled along.SELECTED DRAWING: Figure 1