About 90 results
https://drivepatents.com/patents/994626 · 26 Dec 2012
A method, featuring robustness against changes in tire size, is provided for determining a road surface condition by dividing a time-series waveform of tire vibrations into windows without resorting to detection of the peak positions or measurement of the ...
https://drivepatents.com/patents/1007164 · 14 Dec 2011
A device for estimating the state quantity of a skid motion of a vehicle is provided with an element which finds road surface reaction force model values Fsubx_i_estm and Fsuby_i_estm of respective wheels 2-i and a skid motion state quantity model value Vg...
https://drivepatents.com/patents/1008194 · 26 Oct 2011
An impaired operation detection method is basically performed by sensing a yaw rate of a vehicle over a time period. Then time points are identified in which the yaw rate changes directions. Linear rate of change in the yaw rate is determined between two o...
https://drivepatents.com/patents/1008785 · 12 Oct 2011
A vehicle speed estimator includes a unit (801) that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The un...
https://drivepatents.com/patents/1011103 · 13 Jul 2011
There is provided a method for determining a road surface state which can accurately estimate the road surface state on which a vehicle is running at one of finely classified road surface states based on a sound detection signal from a ground contact surfa...
https://drivepatents.com/patents/1014956 · 16 Mar 2011
A road surface friction coefficient estimating device includes a braking/driving force detecting section for detecting the braking/driving force of a wheel during traveling, a slip ratio detecting section for detecting the slip ratio of the wheel during tr...
https://drivepatents.com/patents/1015144 · 9 Mar 2011
A road surface friction coefficient estimating device includes a lateral force detecting section for detecting the lateral force of a wheel during traveling, a slip angle detecting section for detecting the slip angle of the wheel during traveling, and a r...
https://drivepatents.com/patents/1015426 · 23 Feb 2011
The present invention relates to a yaw angular-velocity measuring system (1) which reduces the costs in measuring the yaw angular-velocity of the vehicles, uses the sensors existing in the vehicle in the measurements that it carries out, controls the yaw a...
https://drivepatents.com/patents/1016529 · 12 Jan 2011
A method and apparatus for terrain sensing that obtains data (104) from at least one sensor onboard a vehicle. The sensor data is used to generate data representing a surface defined by a set of control points. Gradient information is then generated by com...
https://drivepatents.com/patents/1067701 · 3 May 2006
A method of calculating feed-forward lateral acceleration of a moving vehicle is provided. The method includes the use of a corrected steering angle of the vehicle. The steering angle is corrected by using the Ackerman steer angle of the vehicle. Depending...