PROBLEM TO BE SOLVED: To provide a tire air pressure detection system capable of detecting the air pressure of each tire by efficiently and accurately identifying each tire, a vehicle body side device and tire side devices.SOLUTION: Each of the tire side devices preliminarily stores a reception sequence of request signals to be transmitted and transmission timing of a response signal corresponding to the reception sequence, measures the reception strength of each request signal received after receiving a trigger signal from the vehicle body side device, specifies a reception sequence of a request signal which has highest measured reception strength, determines transmission timing corresponding to the reception sequence, and transmits a response signal including an identifier stored in advance when the transmission timing comes. The vehicle body side device associates the identifier included in the response signal with the tire position of the tire on the basis of a reception sequence of response signals received from the tire side devices after transmitting request signals, the request signals being sequentially transmitted to each of the tire side devices after transmitting trigger signals to the whole tire side devices.SELECTED DRAWING: Figure 5
【課題】効率的且つ正確に各タイヤを識別して夫々の空気圧を検出することができるタイヤ空気圧検出システム、車体側装置及びタイヤ側装置を提供する。【解決手段】タイヤ側装置は夫々、送信される要求信号の受信順序、該受信順序に対応する応答信号の送信タイミングを予め記憶しておき、車体側装置からトリガ信号の受信後に受信した要求信号夫々の受信強度を測定し、最も強い受信強度が測定された要求信号の受信順序を特定し、その受信順序に対応する送信タイミングを決定し、送信タイミングが到来した場合に予め記憶してある識別子を含む応答信号を送信させる。車体側装置は、タイヤ側装置全てに向けてトリガ信号を送信した後にタイヤ側装置各々へ向けて要求信号を順次送信させる、要求信号の送信後にタイヤ側装置から受信した応答信号の受信順序に基づき、前記応答信号に含まれる識別子と前記タイヤのタイヤ位置とを対応付ける。【選択図】図5
TIRE AIR PRESSURE DETECTION SYSTEM, VEHICLE BODY SIDE DEICE AND TIRE SIDE DEVICE
タイヤ空気圧検出システム、車体側装置及びタイヤ側装置
2018-04-12
Patent
Electronic Resource
Japanese
TIRE AIR PRESSURE DETECTION SYSTEM, VEHICLE BODY SIDE DEVICE, AND TIRE SIDE DEVICE
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