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公开(公告)号：US09644997B2
公开(公告)日：2017-05-09
申请号：US14235260
申请日：2012-07-20
CPC分类号： G01D18/00 , G01D3/032 , G01D5/145 , G01M15/06 , G01R33/091 , G01R33/093
摘要： An automatic calibration method for a motor vehicle camshaft sensor, the vehicle having at least one camshaft, a toothed encoded target (or magnetic encoder) associated with this camshaft, and a magnetic field sensor placed near the target to detect magnetic field variations caused by the passage of the teeth of the target near the sensor, the sensor delivering signals corrected by a predetermined detection threshold K, the method including: continuously measuring the value of the magnetic field during at least one revolution of the target, determining the maximum amplitude Amax of the field measured during this revolution, determining the minimum amplitude Amin of the field measured during this revolution, finding the ratio of the amplitudes A min A max and determining an auto-adaptive correction coefficient K′ to be applied to the signal received from the magnetic sensor, with allowance for the geometrical imperfections of the target, according to the following formula: K ′ = A min A max × K .
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2.发明申请公开(公告)号：US20140195186A1
公开(公告)日：2014-07-10
申请号：US14235260
申请日：2012-07-20
CPC分类号： G01D18/00 , G01D3/032 , G01D5/145 , G01M15/06 , G01R33/091 , G01R33/093
摘要： An automatic calibration method for a motor vehicle camshaft sensor, the vehicle having at least one camshaft, a toothed encoded target (or magnetic encoder) associated with this camshaft, and a magnetic field sensor placed near the target to detect magnetic field variations caused by the passage of the teeth of the target near the sensor, the sensor delivering signals corrected by a predetermined detection threshold K, the method including: continuously measuring the value of the magnetic field during at least one revolution of the target, determining the maximum amplitude Amax of the field measured during this revolution, determining the minimum amplitude Amin of the field measured during this revolution, finding the ratio of the amplitudes A min A max and determining an auto-adaptive correction coefficient K′ to be applied to the signal received from the magnetic sensor, with allowance for the geometrical imperfections of the target, according to the following formula: K ′ = A min A max × K .
摘要翻译： 一种用于机动车辆凸轮轴传感器的自动校准方法，具有至少一个凸轮轴的车辆，与该凸轮轴相关联的齿编码目标（或磁编码器）和放置在目标附近的磁场传感器，以检测由该凸轮轴引起的磁场变化 传感器附近的目标齿的传递，传感器传送由预定检测阈值K校正的信号，该方法包括：在目标的至少一圈内连续测量磁场的值，确定目标的最大振幅Amax 在该旋转期间测量的场，确定在该旋转期间测量的场的最小振幅Amin，找到振幅A min A max的比率，并确定要施加到从磁体接收的信号的自适应校正系数K' 传感器，根据以下公式，允许目标的几何缺陷：K'= A m 在A max×K。
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