Toyota Jidosha Kabushiki Kaisha

Tatsuya Obuchi

Takeo Moriai

Yosuke Kimura

Masaya Fujimori

Hiroshi Majima

A road surface damage detection device is configured to calculate, for each of road sections, a maximum variation rate that is a maximum value of a variation amount of a wheel speed per unit time in each of vehicles. The device is configured to periodically select, for each of the road sections, a maximum value from the maximum variation rate of each of the vehicles in a prescribed period, set the selected maximum value as a section maximum variation rate, and determine whether or not the road surface damage has occurred by comparing a determination target value with a positive threshold, the determination target value being obtained by subtracting a comparison value, based on at least one of the section maximum variation rates set before last time, from the section maximum variation rate that is set latest.

Road surface damage detection device, road surface damage detection method, and program

A road surface condition estimation apparatus () is provided with a collecting device () for collecting, from vehicle (), behavior information relating to a behavior of the vehicle; a determining device () for determining on the basis of the behavior information whether or not an abnormality condition is satisfied, the abnormality condition being set on the basis of a specific behavior that is expected to be taken by the vehicle when the vehicle encounters a road surface abnormality; and an estimating device () for estimating a condition of the road surface on the basis of a determined result of the determining device.

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Obu, Japan

Tatsuya Obuchi