Title:
A tire air pressure detecting device provided with a wheel position sensing device and it
Document Type and Number:
Japanese Patent JP5954006
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To more surely receive a transmission frame from a transmitter, and to more surely specify wheel positions.SOLUTION: A delay time from a reference angle is set in accordance with a transmission frequency, and each time the transmission frequency is increased, the delay time is shifted by a fixed period of time. When the angle of a transmitter reaches a reference angle, and the delay time elapses, frame transmission is performed. Thus, it is possible to change a transmission angle at which the frame transmission is performed in accordance with the transmission frequency, and to more surely perform frame reception. On the basis of a lapsed time since the previous frame reception to this time frame reception and the transmission cycle of the frame, it is possible to estimate the transmission frequency since the previous frame reception to this time frame reception. Thus, it is possible to calculate tooth positions in the case of accurately performing the frame transmission at a fixed angle as a reference even when any information on the delay time or the transmission frequency is not included in the frame.
Inventors:
Noriaki Okada
Masashi Mori
Masashi Mori
Application Number:
JP2012157634A
Publication Date:
July 20, 2016
Filing Date:
July 13, 2012
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G01M17/007; B60C19/00; B60C23/02; B60C23/04; G01L17/00; G01M17/02
Domestic Patent References:
| JP2006312342A | ||||
| JP2012111481A | ||||
| JP2012096640A | ||||
| JP2009020597A | ||||
| JP2011168099A |
Foreign References:
| WO2011085877A1 |
Attorney, Agent or Firm:
Patent Business Corporation Yuai Patent Office
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