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    • 116. 发明申请
    • METHOD FOR OVERLOAD PROTECTION OF SMA DEVICE
    • SMA器件过载保护方法
    • US20100332151A1
    • 2010-12-30
    • US12797911
    • 2010-06-10
    • Lei HaoXiujie GaoSanjeev M. Naik
    • Lei HaoXiujie GaoSanjeev M. Naik
    • G01L1/00G06F19/00
    • H02N2/142H02N2/10
    • A method for detecting a mechanical overload condition of an energized linear actuator to prevent commanding an activation signal to the linear actuator that may mechanically overload the linear actuator includes monitoring feedback variation of a movable element associated with the linear actuator including monitoring a present feedback signal of the movable element, monitoring a previous feedback signal of the movable element, comparing the present feedback signal and the previous feedback signal and determining the feedback variation based on the comparing. The feedback variation is compared to a feedback variation threshold. An input signal associated with the activation signal for controlling the linear actuator is monitored and the input signal compared to an input signal threshold. The electrical overload condition is detected when the feedback variation is less than the feedback variation threshold and the input signal is greater than the input signal threshold.
    • 一种用于检测通电的线性致动器的机械过载状况以防止对线性致动器的启动信号的指令,该线性致动器可以使线性致动器机械地过载,包括监测与线性致动器相关联的可移动元件的反馈变化,包括监视与线性致动器的当前反馈信号 可移动元件,监测可移动元件的先前反馈信号,比较当前反馈信号和先前反馈信号,并基于该比较确定反馈变化。 将反馈变化与反馈变化阈值进行比较。 监测与用于控制线性致动器的激活信号相关联的输入信号,并将输入信号与输入信号阈值进行比较。 当反馈变化小于反馈变化阈值并且输入信号大于输入信号阈值时,检测到电气过载状况。