Device for contactless measurement of a level in a tank
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United States of America Patent
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Jun 25, 2019
Grant Date -
Mar 2, 2017
app pub date -
Aug 26, 2016
filing date -
Aug 26, 2015
priority date (Note) -
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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.
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