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    • 2. 发明授权
    • Methods and apparatus for determining the condition of a sensor and identifying the failure thereof
    • 用于确定传感器状态并识别其故障的方法和装置
    • US07228249B2
    • 2007-06-05
    • US10299293
    • 2002-11-19
    • Timothy John Hartrey
    • Timothy John Hartrey
    • G06F17/00
    • F02D11/106F02D41/222Y02T10/40
    • Methods and apparatus are provided which generate an error signal if a sensor is either anticipated to fail or fails. At least two sensors provide input signals having magnitudes that approximately correspond to a sensed event. A processor calculates an actual correlation error for the two signals. A processor then further calculates an estimated new correlation value based on the difference of a stored initial correlation value and the actual correlation error. After a predetermined number of estimated correlation values are calculated, the error signal is generated if the difference between an estimated correlation value and the actual correlation error exceeds a predetermined threshold.
    • 提供了如果传感器预期失败或失败,则产生误差信号的方法和装置。 至少两个传感器提供具有近似对应于感测事件的量值的输入信号。 处理器计算两个信号的实际相关误差。 然后,处理器基于所存储的初始相关值和实际相关误差的差进一步计算估计的新相关值。 在计算出预定数量的估计相关值之后,如果估计的相关值和实际相关误差之间的差超过预定阈值,则产生误差信号。