DETERMINATION DEVICE OF AIR PRESSURE STATE OF TIRE

Japanese Patent JP2017140969

A

PROBLEM TO BE SOLVED: To provide a determination device of an air pressure state of a tire capable of evaluating a spectrum characteristic with an approach different from a conventional approach.SOLUTION: There is provided a determination device for determining an air pressure state of a tire attached to a vehicle. The determination device comprises: a data derivation part; a filtering part; an integration part; and a determination part. The data derivation part derives time series data of rotation acceleration or rotation speed of a tire, on the basis of a rotation speed signal of the tire in time series. The filtering part applies a digital filter for extracting a specific frequency band component to the time series data for extracting specific frequency band time series data. The integration part calculates a time region integral value which is an integral value obtained by integrating a function based on the specific frequency band time series data with the time region, as an integral value of a spectrum of the time series data in the specific frequency band or a value according to the integral value of the spectrum. The determination part determines an air pressure state of the tire on the basis of the time region component value.SELECTED DRAWING: Figure 3

WO/2023/073787	PHYSICAL QUANTITY DETECTION DEVICE
WO/2005/032859	REAL-TIME SIGNAL PROCESSING FOR VEHICLE TIRE LOAD MONITORING

SHUTO KEISUKE

JP2016024466A

August 17, 2017

February 12, 2016

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SUMITOMO RUBBER IND

B60C23/06; B60C23/02; G01L17/00

Tachibana Kenji
Yamada Iichiro
Junya Tanaka
Hiroki Matsui
Yamashita Unknown

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