Hiroaki Kawasaki

TL;DR: In this paper, a rotational speed detecting means, a first calculating means for calculating a vehicle speed, a second calculating mean for calculating acceleration/deceleration of the vehicle, and a third calculating measure for calculating the slip ratio of the driver.

TL;DR: In this paper, an apparatus for judging road surface gradients including a speed detecting means for periodically detecting wheel speeds of four wheels of a vehicle, a vehicle body speed calculating means for obtaining an acceleration of the vehicle body, a determining means for determining whether the acceleration of vehicle body is within a specified range proximate to zero, and a gradient judging means for judging a gradient of a road surface on the basis of the determination of the determining means.

TL;DR: In this paper, an apparatus for detecting a tire having decreased pressure based on the resonance frequency of the tires attached to respective wheels of a vehicle is presented, which includes a storage means for storing information regarding a distribution of resonance frequencies respectively corresponding to a plurality of air pressure statuses.

TL;DR: In this article, a wheel sensor for detecting passage of teeth of a gear provided in association with the tires of a vehicle was used to calculate the number of teeth passed per a sampling cycle set in advance, and a wheel speed calculation means was configured to calculate tire rotation speed information based on an interval between neighboring teeth in the gear.