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21.发明授权Measurement of the maximum adhesion coefficient by measuring stress in a bead of a tire 有权通过测量轮胎胎圈中的应力来测量最大附着系数公开(公告)号：US07398146B2
公开(公告)日：2008-07-08
申请号：US11015353
申请日：2004-12-17
Applicant: David Bertrand
Inventor： David Bertrand
IPC: G01M17/02
CPC classification number: G01N19/02 , B60T8/172 , B60T2210/12
Abstract: A method of determining a friction coefficient μ in a contact area of a tire on a road. Fixed points are selected that lie at different azimuths along a circumference of at least one bead of the tire. A shear stress value is measured at each of the fixed points while the tire is rolling on the road. The measured shear stress values are processed to determine the friction coefficient μ.
Abstract translation: 一种确定道路上的轮胎的接触区域中的摩擦系数μ的方法。 沿着轮胎的至少一个胎圈的圆周，选择位于不同方位角处的固定点。 在轮胎在道路上滚动时，在每个固定点处测量剪切应力值。 测量剪切应力值，以确定摩擦系数μ。
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22.发明申请Method of timing a remarkable angular position of a sensor carried by a tire 有权定时轮胎承载的传感器的显着角度位置的方法
公开(公告)号：US20080126006A1
公开(公告)日：2008-05-29
申请号：US11985504
申请日：2007-11-15
Applicant: David Bertrand
Inventor： David Bertrand
IPC: G01P3/00
CPC classification number: G01D3/028 , B60C23/0408 , G01D1/16
Abstract: A method of timing a remarkable angular position (θR) of at least one sensor (12) carried by a tire (10) rotating relative to an external frame of reference. The following steps are performed: forming, from an output signal from the sensor (12), a reference signal suitable for presenting a remarkable extremum during one revolution of the tire (10); determining the time of an origin angular position (θ0) of the sensor as being the time of the remarkable extremum of the reference signal; and determining the time of the remarkable angular position (θR) relative to the time of the origin angular position.
Abstract translation: 定时由轮胎（10）承载的至少一个传感器（12）的相对于外部参考框架旋转的显着角位置（θ/ R）的方法。 执行以下步骤：从传感器（12）的输出信号形成适于在轮胎（10）的一圈内呈现出极大的极值的参考信号; 确定传感器的原点角位置（θ<0> 0）的时间是参考信号的显着极值的时间; 以及确定相对于原点角位置的时间的显着的角位置（θSUB）的时间。
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23.发明申请
公开(公告)号：US20050065698A1
公开(公告)日：2005-03-24
申请号：US10911047
申请日：2004-08-04
Applicant: David Bertrand
Inventor： David Bertrand
CPC classification number: B60T8/1725
Abstract: A method of determining the grip coefficient μ in the contact area of a tire on a road includes the steps of selecting a plurality of fixed points in space (that is to say ones that are fixed in the reference frame associated with the vehicle) which points lie at different azimuths along the circumference in at least one sidewall of the tire, obtaining a corresponding number of measurements of circumferential distance variation (extension or contraction) at these fixed points when the tire is rolling on the road, and the measurement signals are processed so as to extract the grip coefficient μ.
Abstract translation: 确定道路上的轮胎的接触区域中的抓地系数μ的方法包括以下步骤：在空间（即，与车辆相关联的参考系中固定的固定点）中选择多个固定点 沿着轮胎的至少一个侧壁中的圆周处于不同的方位角，获得在轮胎在道路上滚动时在这些固定点处的圆周距离变化（延伸或收缩）的相应数量的测量，并且处理测量信号 以提取握力系数μ。
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公开(公告)号：US688322A
公开(公告)日：1901-12-10
申请号：US1900038157
申请日：1900-11-30
Applicant: METCALF DAVID BERTRAND
Inventor： METCALF DAVID BERTRAND
CPC classification number: G09F23/00
