SENSOR TRANSMITTER, WHEEL POSITION DETECTION DEVICE, AND TIRE AIR PRESSURE DETECTION DEVICE COMPRISING THE SAME

• Main Author: MAEHARA HIROAKI
• Format: Patent
• Language: English; Japanese
• Published: 23.03.2017
• Subjects: DEVICES OR ARRANGEMENTS RELATED TO TYRES; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PERFORMING OPERATIONS; PHYSICS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; TESTING; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; VEHICLE TYRES; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To allow wheel position detection to be adequately performed without requiring an additional facility, such as a trigger machine, or a two-axial G sensor, with little constraint on a mounting position, and without bringing in complication of communication specification.SOLUTION: A sensor transmitter 2 itself calculates the inclination angle θof attachment of a G sensor 22 to wheels 5a-5d, and estimates which the G sensor is attached to, right wheels 5a, 5c or left wheels 5c, 5d on the basis of a calculation quadratic function and an actual measurement quadratic function. Then, a receiver 3 side determines which each sensor transmitter 2 is attached to, any of both front wheels 5a, 5b or any of both rear wheels 5c, 5d on the basis of the estimation result and an effective tire radius. This makes it possible to determine which each sensor transmitter 2 is attached to, a wheel 5a, 5b, 5c, or 5d.SELECTED DRAWING: Figure 1 【課題】トリガ機などの追加の設備や２軸のＧセンサを必要とせず、搭載位置の制約も少なく、通信仕様の複雑化を招かなくても、的確に車輪位置検出を行うことができるようにする。【解決手段】センサ送信機２自身で、車輪５ａ〜５ｄに対するＧセンサ２２の取り付けの傾斜角度θsetを演算し、計算２次関数と実測２次関数とに基づいて、右車輪５ａ、５ｃと左車輪５ｂ、５ｄのいずれに取り付けられたものであるかを推定する。そして、その推定結果および実効タイヤ半径に基づいて、受信機３側で各センサ送信機２が両前輪５ａ、５ｂと両後輪５ｃ、５ｄのいずれに取り付けられたものであるかを特定する。これにより、センサ送信機２が車輪５ａ〜５ｄのいずれに取り付けられたものであるかを特定することが可能となる。【選択図】図１