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    Method and apparatus for determining a digital phase shift in a signal
    15.
    发明授权
    Method and apparatus for determining a digital phase shift in a signal 有权
    用于确定信号中的数字相移的方法和装置

    公开(公告)号：US06407599B1

    公开(公告)日：2002-06-18

    申请号：US09567896

    申请日：2000-05-10

    申请人： Daniel P. Phinney ,  David M. Pultorak

    发明人： Daniel P. Phinney ,  David M. Pultorak

    IPC分类号： H03L700

    CPC分类号： G01N29/4436 ,  B65H7/125 ,  B65H2553/30 ,  B65H2557/61 ,  G01N29/075 ,  G01N29/36 ,  G01N2291/015 ,  G01N2291/0237 ,  G01R25/00 ,  G03G2215/00548 ,  H04N1/00002 ,  H04N1/00037 ,  H04N1/0005 ,  H04N1/00092

    摘要： A method for determining a digital phase in a signal comprises sampling a reference signal for a low going edge. If the low going edge is not detected the reference signal is sampled again. If low going edge is detected (78) a counter is initialized (70). The reference signal is again sampled if a high going edge is not detected the reference signal is resampled until the high going edge is detected (79). When a high going edge is detected (79) a counter is started (73). A resulting signal is then sampled if the level of the resulting signal is high the resulting signal is sampled until a low going edge is detected (78). If a low going edge is not detected sampling of the resulting signal continues. If a low going edge is detected (78) sampling is continued until a high going edge is detected (79) at which point the counter is stopped (76). The counter updates a register (96). When the resulting signal was sampled for a high level the resulting signal is sampled until a high going edge is determined (79) at which point the register is stopped and converted to a phase difference (84). In one embodiment of the invention the reference signal being sampled is a driver for an ultrasonic transmitter (14) and the resulting signal is an electrical signal (21) representative of a received ultrasonic signal (16).

    摘要翻译： 用于确定信号中的数字相位的方法包括对低走沿的参考信号进行采样。 如果未检测到下降沿，则再次采样参考信号。 如果检测到下降沿（78），则计数器被初始化（70）。 如果没有检测到高电平边沿，则再次采样参考信号，直到检测到高电平边沿为止重新采样参考信号（79）。 当检测到高档边缘时（79）启动计数器（73）。 如果所得到的信号的电平为高，则产生的信号被采样，得到的信号被采样，直到检测到低的下降沿（78）。 如果未检测到低电平边沿，则产生的信号的采样继续。 如果检测到下降沿（78），则继续采样直到检测到高的上升沿（79），此时计数器停止（76）。 计数器更新寄存器（96）。 当所得到的信号被采样为高电平时，得到的信号被采样，直到确定高电平边沿为止（79），此时寄存器停止并转换为相位差（84）。 在本发明的一个实施例中，被采样的参考信号是用于超声波发射器（14）的驱动器，并且所得到的信号是表示接收的超声信号（16）的电信号（21）。

    JAM SENSING AT DOCUMENT FEEDING STATION
    18.
    发明申请
    JAM SENSING AT DOCUMENT FEEDING STATION 有权
    文件进料站JAM感应

    公开(公告)号：US20130093136A1

    公开(公告)日：2013-04-18

    申请号：US13273263

    申请日：2011-10-14

    申请人： Swapnil Sakharshete ,  David M. Schaertel ,  Daniel P. Phinney

    发明人： Swapnil Sakharshete ,  David M. Schaertel ,  Daniel P. Phinney

    IPC分类号： B65H7/06 ,  B65H7/20 ,  B65H7/12

    CPC分类号： G03G15/70 ,  G03G15/6511 ,  G03G15/703 ,  G03G2215/00341 ,  G03G2215/00548 ,  G03G2215/00637

    摘要： A method for preventing damage to a document by a document transport apparatus provides a member for receiving the document as a stack of sheets to be serial fed to a feeding station. At least two spaced-apart microphones are disposed at the feeding station and responsive to audio to produce signals representing audio energy received by each microphone respectively. The energy received from each microphone is compared to determine if it is ambient noise or if it indicates that two attached sheets are being fed or a single sheet is being damaged. The document transport apparatus is shut off to prevent damage to documents when it has been determined that two attached sheets are being fed or that a single sheet is being damaged.

    摘要翻译： 用于防止由文件传送装置损坏文件的方法提供了一个用于接收文件的构件作为要被串联馈送到馈送站的一叠纸张。 至少两个间隔开的麦克风被布置在馈送站处并且响应于音频以分别产生表示由每个麦克风接收的音频能量的信号。 比较从每个麦克风接收到的能量，以确定其是否是环境噪声，或者如果它指示正在进给两个连接的纸张或单个纸张被损坏。 当确定正在进给两个附着的纸张或单张纸被损坏时，文件传送装置被切断以防止损坏文件。

    Method and apparatus for detection of wrinkled documents in a sheet feeding device
    20.
    发明授权
    Method and apparatus for detection of wrinkled documents in a sheet feeding device 有权

    公开(公告)号：US06520498B2

    公开(公告)日：2003-02-18

    申请号：US09746049

    申请日：2000-12-21

    申请人： Daniel P. Phinney

    发明人： Daniel P. Phinney

    IPC分类号： B65H712

    CPC分类号： B65H7/06 ,  B65H2511/21 ,  B65H2511/522 ,  B65H2511/528 ,  B65H2553/30 ,  B65H2220/01 ,  B65H2220/03

    摘要： An apparatus and method for detecting wrinkling of sheets of material is provided. A change in an angle the sheet forms with a reference line can be detected. When the change in the angle exceeds a threshold value, wrinkling of the sheet can be detected. In an exemplary embodiment, ultrasound signals may be used to detect wrinkling. As ultrasound passes through a sheet of material, for example, paper, there is both a phase shift and an amplitude reduction to that ultrasound signal. As the angle of the sheet changes with respect to the ultrasound signal due to wrinkling of the sheet, the phase shift and amplitude of the signal after it passes through the sheet changes. Thus, as the sheet begins to wrinkle, there is a change in the phase shift and amplitude of the signal. These changes can be used to detect the start of a document jam or wrinkling of a sheet of material.