Title:
DEVICE FOR CAPACITIVE MEASUREMENTS IN A MULTI-PHASE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2019/138181
Kind Code:
A1
Abstract:
The invention relates to a device comprising at least one pair of excitation electrodes (1, 2) forming a capacitor, a floorplan (PM), and an electronic circuit (3), characterised in that it comprises at least one control electrode (4) arranged at a distance from the capacitor, and a switching circuit (5) comprising a switch (50) having an open state and a closed state, and designed so as to apply, to the control electrode (4), an electric potential common to the floorplan (PM) in the closed state, and to leave a floating electrical potential for the control electrode (4) in the open state; and in that the electronic circuit (3) is designed to measure the mutual capacitance between the pair of excitation electrodes (1, 2) when the switch (50) is in the open state and in the closed state.
Inventors:
THIBAULT PIERRE (FR)
Application Number:
PCT/FR2019/050033
Publication Date:
July 18, 2019
Filing Date:
January 08, 2019
Export Citation:
Assignee:
KAPFLEX (FR)
International Classes:
G01F23/26
Foreign References:
| EP3246667A1 | 2017-11-22 | |||
| JP2000065775A | 2000-03-03 | |||
| US7258005B2 | 2007-08-21 |
Attorney, Agent or Firm:
PINOT, Christophe (FR)
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