Fluid level sensor
US6993967B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2003 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Aug 28, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2968
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic fluid level sensor for use in a fluid container, preferably a vehicle fuel tank. The fluid level sensor generally includes a single transceiver having measurement and reference sections, an impedance layer and a housing having a reference element and an aperture. The measurement and reference sections are independent ultrasonic transceivers that are disk-shaped and ring-shaped, respectively, and are generally concentric. The reference element is a ring-shaped portion of the housing that is axially spaced from the reference section at a known distance, and the aperture is a disk-shaped opening in the housing that is axially spaced from the measurement section. In operation, the sensor is able to provide signals to an electronic controller that enable the controller to determine a signal velocity calibrated measurement of the fluid level that is compensated for temperature, fluid composition, and other velocity affecting factors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.