公开(公告)号：US07447449B2

公开(公告)日：2008-11-04

申请号：US11455970

申请日：2006-06-20

申请人： Michael Quoc Lu ,  Robert Bruce Anderson, Jr. ,  William H. Wayman

发明人： Michael Quoc Lu ,  Robert Bruce Anderson, Jr. ,  William H. Wayman

IPC分类号： G03G21/00 ,  G03G15/00

CPC分类号： G03G15/5004 ,  G03G2221/0005

摘要： A method for detecting a stress condition in a cleaning system of an imaging device is provided. The method comprises receiving a pulse-width modulated (PWM) signal. The PWM signal has a duty cycle for driving a PWM servo motor of a cleaning system. A determination is then made whether the duty cycle of the PWM signal indicates that the servo motor is working within design limits. If the duty cycle is within design limits, characteristic adjustments of the duty cycle of the PWM are detected that indicate an occurrence of a non-catastrophic stress condition in the cleaning system. Once a characteristic adjustment of the duty cycle is detected, an alert signal is generated.

摘要翻译： 提供一种用于检测成像装置的清洁系统中的应力状况的方法。 该方法包括接收脉冲宽度调制（PWM）信号。 PWM信号具有用于驱动清洁系统的PWM伺服电动机的占空比。 然后确定PWM信号的占空比是否表示伺服电机在设计限制内工作。 如果占空比在设计限制内，则检测到PWM的占空比的特征调整，其指示在清洁系统中出现非灾难性应力状况。 一旦检测到占空比的特性调整，就产生报警信号。