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1. 发明授权

US5181423A Apparatus for sensing and transmitting in a wireless manner a value to be measured 失效
标题翻译：用于传感和传输无线网络的设备要测量的值
公开(公告)号：US5181423A
公开(公告)日：1993-01-26
申请号：US775828
申请日：1991-10-11
申请人： Michael Philipps , Hans-Dieter Schad , Wolfgang Viel
发明人： Michael Philipps , Hans-Dieter Schad , Wolfgang Viel
IPC分类号： G01L1/10 , G01D5/241 , G01L9/10 , G01L9/12 , G08C19/00 , G08C19/18
CPC分类号： G01D5/2417 , G01L9/125
摘要： A device for measuring physical values, each as pressure changes, includes a sensor transponder section and an interrogator receiver section for transmitting interrogation signals including a power supply from the interrogator receiver section to the sensor transponder section and for transmitting measured signal values in the opposite direction. The sections can be coupled to each other by inductive coils so that electrical connections are avoided. Thus, the pressure in a rotating automobile tire can be measured, for example. The sensor transponder section includes a computer circuit the input of which receives a reference frequency signal and a measured frequency signal. A reference oscillating signal has a frequency determining element that is not influenced by the pressure to be measured, but only by extraneous, e.g. environmental influences. A measuring oscillating circuit has a frequency determining element that is responsive to the changes in the physical value to be measured. Both frequency determining elements are so arranged that they are exposed to the same extraneous conditions, whereby adverse influences of these conditions on the measured values are compensated.
摘要翻译：用于测量物理值的装置，每个压力变化包括传感器转发器部分和询问器接收器部分，用于将询问信号包括来自询问器接收器部分的电源传送到传感器应答器部分，并用于传输相反方向上的测量信号值。这些部分可以通过感应线圈彼此耦合，以避免电连接。因此，可以测量旋转的汽车轮胎中的压力。传感器转发器部分包括其输入端接收参考频率信号和测量的频率信号的计算机电路。参考振荡信号具有频率确定元件，其不受待测压力的影响，但仅由外部的，例如，环境影响。测量振荡电路具有响应于待测物理值的变化的频率确定元件。两个频率确定元件被布置成使得它们暴露于相同的外来条件，由此补偿这些条件对测量值的不利影响。

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