Device for contactless measurement of a level in a tank
US10330515B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2016 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Dec 16, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2900/1814
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring device that measures the level of fluid in a tank, for example a level of an aqueous urea solution in a tank for catalytic converters of combustion engines. The measuring means include: at least one sensor including a capacitive element electrically coupled to an oscillator configured to deliver a signal Si whose frequency FiPAD is a function of the capacitance of the capacitive element; at least one sensor being intended to be disposed outside of the tank, so that the capacitance of the capacitive element varies based on the level n of the fluid, when the level is comprised between a first threshold hi-min and a second threshold hi-max; a processing module, coupled to at least one sensor, and configured to determine the level n of fluid in the tank based on the frequency of the signal Si.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.