| Wireless Liquid Level Sensing for Restaurant Applications |
| Citation: |
Dietz, P.H.; Leigh, D.L.; Yerazunis, W.S., "Wireless Liquid Level Sensing for Restaurant Applications", IEEE Sensors, Vol. 1, pp. 715-720, June 2002 (IEEE Xplore) |
| Date: | April 2002 |
| MERL Contact: | William Yerazunis |
Since restaurants often make much of their profits on drinks, it is critical for servers to offer refills in a timely fashion. We propose wireless liquid level sensing glassware to aid in this task. Specially instrumented glassware detects fluid levels via a high-resolution capacitance measurement. A coil embedded in the table inductively couples power to the glasses, and provides a path for data exchange. Our prototype glass uses a standard microprocessor and a small number of passive components, making it extremely inexpensive. |
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