公开(公告)号：US10003862B2

公开(公告)日：2018-06-19

申请号：US13860851

申请日：2013-04-11

申请人： Endotronix, Inc.

发明人： Harry D. Rowland ,  Roger Dwight Watkins ,  Balamurugan Sundaram ,  Brian Paul ,  In Soo Ahn ,  Michael Nagy

IPC分类号： H04Q5/22 ,  H04Q9/00

CPC分类号： H04Q9/00

摘要： A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits a narrowband, fixed frequency excitation pulse to cause the wireless sensor to generate a ring signal. The ring signal corresponds to the value of the physical parameter being sensed. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The low power, simple circuitry required to generate the excitation pulse allows the reader to be a small, battery operated unit. Alternative methods of frequency determination are also disclosed.

公开(公告)号：US20140306807A1

公开(公告)日：2014-10-16

申请号：US13860851

申请日：2013-04-11

申请人： Endotronix, Inc.

发明人： Harry D. Rowland ,  Roger Dwight Watkins ,  Balamurugan Sundaram ,  Brian Paul ,  In Soo Ahn ,  Michael Nagy

IPC分类号： G08C19/16

CPC分类号： H04Q9/00

摘要： A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits a narrowband, fixed frequency excitation pulse to cause the wireless sensor to generate a ring signal. The ring signal corresponds to the value of the physical parameter being sensed. The wireless sensor reader receives and amplifies the ring signal and sends the signal to a phase-locked loop. A voltage-controlled oscillator in the phase-locked loop locks onto the ring signal frequency and generates a count signal at a frequency related to the ring signal frequency. The voltage-controlled oscillator is placed into a hold mode where the control voltage is maintained constant to allow the count signal frequency to be determined. The low power, simple circuitry required to generate the excitation pulse allows the reader to be a small, battery operated unit. Alternative methods of frequency determination are also disclosed.

摘要翻译： 提供无线传感器读取器以与无线传感器接口。 无线传感器读取器传输窄带固定频率激励脉冲，使无线传感器产生振铃信号。 振铃信号对应于被感测的物理参数的值。 无线传感器读取器接收并放大振铃信号并将信号发送到锁相环。 锁相环中的压控振荡器锁定在环形信号频率上，并以与环形信号频率相关的频率产生计数信号。 压控振荡器处于保持模式，其中控制电压保持恒定，以允许确定计数信号频率。 产生激励脉冲所需的低功耗，简单的电路允许读取器是一个小的，电池供电的单元。 还公开了频率确定的替代方法。