PROBLEM TO BE SOLVED: To prevent forgetting to output an initialization instruction after adjustment of tire air pressure, and prevent reduction of detection accuracy of pressure reduction of a tire.SOLUTION: There is provided a tire pressure reduction detection device for a tire attached to a vehicle. The detection device comprises a storage part, a pressure reduction determination part, an initialization part, an adjustment determination part, and an initialization forgetting alarm part. The storage part stores a reference value of an index value for determining pressure reduction. The pressure reduction determination part compares a current value of the index value with the reference value, for determining whether or not pressure of the tire is reduced. The initialization part updates the reference value when an initialization instruction from a user is detected. The adjustment determination part determines whether or not tire air pressure is adjusted on the basis of a first index value at a first timing and a second index value at a second timing after the first timing. The initialization forgetting alarm part outputs initialization forgetting alarm, when it is determined that the air pressure is adjusted and the initialization instruction is not detected.SELECTED DRAWING: Figure 5

    【課題】タイヤの空気圧の調整後における初期化指示の出し忘れを防止し、タイヤの減圧の検出精度の低下を防止する。【解決手段】車両に装着されたタイヤの減圧の検出装置が提供される。検出装置は、記憶部、減圧判定部、初期化部、調整判定部及び初期化忘れ警報部を備える。記憶部は、減圧を判定するための指標値の基準値を記憶する。減圧判定部は、指標値の現在値と基準値との比較により、タイヤが減圧しているか否かを判定する。初期化部は、ユーザからの初期化指示が検知された場合に、基準値を更新する。調整判定部は、第1のタイミングでの第1指標値と、第1のタイミングよりも後の第2のタイミングでの第2指標値とに基づいて、タイヤの空気圧が調整されたか否かを判定する。初期化忘れ警報部は、空気圧が調整されたと判定され、かつ、初期化指示が検知されない場合に、初期化忘れ警報を行う。【選択図】図5


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    Title :

    TIRE PRESSURE REDUCTION DETECTION DEVICE


    Additional title:

    タイヤの減圧の検出装置


    Contributors:

    Publication date :

    2017-08-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen



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