Title:
RADIO FREQUENCY BASED LIQUID LEVEL SENSOR
Document Type and Number:
WIPO Patent Application WO/2019/140055
Kind Code:
A1
Abstract:
In at least some implementations, a liquid tank and liquid level measuring assembly includes a liquid tank having an interior and an exterior, the interior configured to hold liquid, a carrier received within the interior of the liquid tank and moveable in response to changes in the level of liquid in the interior, a first RF device received outboard of the interior, and a second RF device coupled to the carrier for movement with the carrier. The first RF device and second RF device are wirelessly communicated with each other via a radio frequency transmission to permit determining one or both of: a distance between the first RF device and second RF device and a time for RF transmissions between the first RF device and the second RF device, wherein the distance or time is a function of the liquid level in the liquid tank.
Inventors:
ANDERSSON MARTIN (US)
HEALY CYRUS (US)
LAMARR GERALD (US)
LINTON ROBBY (US)
HEALY CYRUS (US)
LAMARR GERALD (US)
LINTON ROBBY (US)
Application Number:
PCT/US2019/012996
Publication Date:
July 18, 2019
Filing Date:
January 10, 2019
Export Citation:
Assignee:
WALBRO LLC (US)
International Classes:
G01F23/284; G01F23/00
Foreign References:
| US20120158321A1 | 2012-06-21 | |||
| JP6234512B2 | 2017-11-22 | |||
| US20060185438A1 | 2006-08-24 | |||
| JP2010175308A | 2010-08-12 | |||
| US20130239676A1 | 2013-09-19 |
Attorney, Agent or Firm:
SCHMIDT, Matthew, J. (US)
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