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公开(公告)号：US06486661B2
公开(公告)日：2002-11-26
申请号：US09781048
申请日：2001-02-12
IPC分类号： G01N2772
CPC分类号： G01C25/005 , G01D3/022 , G01D3/0365
摘要： A method of removing bias drift from the output signal of a sensor is provided. The method includes sensing a condition with a sensor and generating an output signal, differentiating the output signal, and comparing the differentiated output signal with a threshold change. The method also includes the steps of determining the presence of bias drift based on the comparison, generating a bias adjustment command signal based on the determined presence of bias drift, and adjusting the sensed signal generated by the sensor in accordance with the bias adjusted command signal so as to remove bias drift from the output signal.
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公开(公告)号：US5866796A
公开(公告)日：1999-02-02
申请号：US789696
申请日：1997-01-27
IPC分类号： G01C19/5684 , G01P21/00 , G01C25/00
CPC分类号： G01C19/5684 , G01P21/00
摘要： A yaw sensor for automotive controls has a microstructure vibrating ring excited by a driving circuit. The driving circuit comprises an amplitude control loop which delivers voltage pulses at the resonant frequency of the ring. A compensation signal is derived from a comparison of a sensed vibration amplitude to a desired vibration amplitude. Failure of vibration is detected by comparing the compensation signal to a threshold which is higher than a normal compensation signal. Alternatively, vibration failure is detected by comparing the sensed vibration to a threshold lower than the desired vibration amplitude. Upon such failure, the yaw output signal is replaced by ground potential.
摘要翻译： 用于汽车控制的偏航传感器具有由驱动电路激励的微结构振动环。 驱动电路包括以环的谐振频率传送电压脉冲的振幅控制回路。 补偿信号是从感测到的振动振幅与期望振动振幅的比较得出的。 通过将补偿信号与高于正常补偿信号的阈值进行比较来检测振动失败。 或者，通过将感测到的振动与低于期望的振动幅度的阈值进行比较来检测振动失效。 在这种故障时，偏航输出信号被地电位代替。
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公开(公告)号：US5652374A
公开(公告)日：1997-07-29
申请号：US500217
申请日：1995-07-10
IPC分类号： G01C19/5684 , G01P21/00
CPC分类号： G01C19/5684 , G01P21/00
摘要： A yaw sensor for automotive controls has a microstructure vibrating ring excited by a driving circuit. The driving circuit comprises an amplitude control loop which delivers voltage pulses at the resonant frequency of the ring. A compensation signal is derived from a comparison of a sensed vibration amplitude to a desired vibration amplitude. Failure of vibration is detected by comparing the compensation signal to a threshold which is higher than a normal compensation signal. Alternatively, vibration failure is detected by comparing the sensed vibration to a threshold lower than the desired vibration amplitude. Upon such failure, the yaw output signal is replaced by ground potential.
摘要翻译： 用于汽车控制的偏航传感器具有由驱动电路激励的微结构振动环。 驱动电路包括以环的谐振频率传送电压脉冲的振幅控制回路。 补偿信号是从感测到的振动振幅与期望振动振幅的比较得出的。 通过将补偿信号与高于正常补偿信号的阈值进行比较来检测振动失败。 或者，通过将感测到的振动与低于期望的振动幅度的阈值进行比较来检测振动失效。 在这种故障时，偏航输出信号被地电位代替。
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