Patent ID: 9658067
Date: 2017-05-23
CPC Classifications: G01C,G01P

Claim:
1. A velocity calculation device comprising: a velocity calculation portion that calculates a velocity in a travel direction of a vehicle in succession on the basis of accelerations in a vertical direction that are detected in succession by a vertical direction acceleration detection portion and generated correspondingly to undulation of a road surface on which the vehicle is traveling, and angular velocities about a horizontal axis that are detected in succession by a horizontal direction angular velocity detection portion and generated correspondingly to the undulation of the road surface on which the vehicle is traveling, without acquiring information on traveling from the vehicle, wherein the velocity calculation portion calculates a first velocity in the succession of calculated velocities, in which the first velocity is after a second velocity in the succession of calculated velocities, by changing a sampling number of data points about a data point corresponding to a position of the vehicle at which the second velocity is calculated.