Non-invasive radio frequency liquid level and volume detection system and method using phase shift
US9829366B2 · kind B2 · utility
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23Claims
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Key dates
| Filing date | Oct 17, 2014 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Jan 27, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/52
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A medical fluid system includes a container holding a fluid at a level; and a radio frequency level sensor operably connected to the container and including an emitting electrode and a receiving electrode, the electrodes operating as a transmission line having an electrical impedance that varies with the level or volume of the fluid in the container, the level sensor configured to measure a phase shift of the transmission line, the phase shift indicative of the level or volume of the fluid in the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.