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US 2020/0225064 A1Published application
Improvements in or relating to vibrating element apparatus
AssigneeRosemount Measurement Limited
InventorsGeorge Alexander MacDonald, Jonathan James Goff
Life of this patent
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Abstract
The invention provides a method of driving a vibrating sensor in which the drive signal is combined with an amplitude modulated high frequency carrier. The signal is demodulated at a position adjacent to the component to be driven. This method may be applied to reducing cross-talk between drive and pick-up wire pairs and also to passing both drive and pickup signals, and two drive signals, down the same wire pair.
Claims10
A method of driving a vibrating sensor, said sensor having a vibrating element;
- and drive and signal processing electronics spaced from said vibrating element, wherein said method comprises transmitting a signal to excite said vibrating element as an amplitude modulated high frequency signal, and demodulating said signal close to said vibrating element.
A vibrating sensor, said sensor having a vibrating element;
- and drive and signal processing electronics spaced from said vibrating element said drive and signal processing electronics being operable to transmit a drive signal to excite said vibrating element, and to receive a pick-up signal from said vibrating element, wherein said electronics is operable to transmit said drive signal as an amplitude modulated high frequency signal, said sensor further including a demodulating facility to de-modulate said drive signal close to said vibrating element.
Dependencies are inferred from the claim text.