Liquid level detection based on tunable inductive-capacitive tank circuit
US11988540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2022 |
| Grant date | May 21, 2024 |
| Priority date | — |
| Expiry date | Aug 15, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus includes a probe configured to provide at least a portion of capacitance of an inductance-capacitance (LC) circuit of a detection circuit, the capacitance of the LC circuit being dependent on a distance between the probe and a surface of a liquid in a biochemical analysis system. The apparatus includes a movement mechanism configured to move the probe. The apparatus includes circuitry configured to perform operations that include causing the movement mechanism to move the probe with respect to the liquid; measuring one or more characteristics of an output signal of the detection circuit, the one or more characteristics being dependent on the capacitance of the LC circuit; and detecting, based on the one or more characteristics of the output signal, a contact between the probe and the surface of the liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.