Patents by Inventor Yoji Takayama

Yoji Takayama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and device for calculating vehicle speed
    Patent number: 9764737
    Abstract: A vehicle speed calculating device is provided. The device includes a first vehicle speed calculating module configured to calculate a first vehicle speed based on a vehicle speed pulse count of a vehicle, a second vehicle speed calculating module configured to calculate a second vehicle speed based on positioning signals broadcasted from positioning satellites, an acceleration acquiring module configured to acquire an acceleration detected by an acceleration sensor provided to the vehicle, an estimating module configured to estimate a speed error based on a correlative relationship of a difference value between the first and second vehicle speeds with the acceleration, and a correcting module configured to correct the first vehicle speed based on the speed error.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: September 19, 2017
    Assignee: Furuno Electric Co., Ltd.
    Inventor: Yoji Takayama
  • METHOD AND DEVICE FOR CALCULATING VEHICLE SPEED
    Publication number: 20160159354
    Abstract: A vehicle speed calculating device is provided. The device includes a first vehicle speed calculating module configured to calculate a first vehicle speed based on a vehicle speed pulse count of a vehicle, a second vehicle speed calculating module configured to calculate a second vehicle speed based on positioning signals broadcasted from positioning satellites, an acceleration acquiring module configured to acquire an acceleration detected by an acceleration sensor provided to the vehicle, an estimating module configured to estimate a speed error based on a correlative relationship of a difference value between the first and second vehicle speeds with the acceleration, and a correcting module configured to correct the first vehicle speed based on the speed error.
    Type: Application
    Filed: December 2, 2015
    Publication date: June 9, 2016
    Inventor: Yoji Takayama