Patent ID: 11904864
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. The update system for related value information according to claim 1,
wherein the storage device is configured to:
obtain, as sampling values, a predetermined number of the sensor values included in the travel information in a chronological order of the measurement of the sensor values;
apply fast Fourier transform to a value obtained by multiplying a weight coefficient, which is defined by a predetermined window function and corresponds to each of the sampling values, by the each of the sampling values, to thereby identify the road surface displacement-related value corresponding to the each of the sampling values; and
obtain a next sampling value from the sensor values included in the travel information after the application of the fast Fourier transform, and apply the fast Fourier transform to the value obtained by multiplying the next sampling value by the weight coefficient,

wherein, in the predetermined window function:
weight coefficients that reduce the sampling value to a smaller value are associated with start-stage sampling values, which are a third predetermined number of sampling values from a start point of the sampling values, and end-stage sampling values, which are a fourth predetermined number of sampling values to an end of the sampling values; and
a weight coefficient that maintains an original value of the sampling value is associated with intermediate-stage sampling values being sampling values other than the start-stage sampling values and the end-stage sampling values, and

wherein the storage device is configured to update the related value information based on the road surface displacement-related values obtained by excluding both of the start-stage related values and the end-stage related values from the road surface displacement-related values from which the low frequency component is removed.