TR2002-21

Wireless Liquid Level Sensing for Restaurant Applications


    •  Dietz, P.H., Leigh, D.L., Yerazunis, W.S., "Wireless Liquid Level Sensing for Restaurant Applications", IEEE Sensors, June 2002, vol. 1, pp. 715-720.
      BibTeX TR2002-21 PDF
      • @inproceedings{Dietz2002jun,
      • author = {Dietz, P.H. and Leigh, D.L. and Yerazunis, W.S.},
      • title = {Wireless Liquid Level Sensing for Restaurant Applications},
      • booktitle = {IEEE Sensors},
      • year = 2002,
      • volume = 1,
      • pages = {715--720},
      • month = jun,
      • url = {https://www.merl.com/publications/TR2002-21}
      • }
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Abstract:

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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