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1. WO2020113283 - CAPACITIVE SENSOR

Publication Number WO/2020/113283
Publication Date 11.06.2020
International Application No. PCT/AU2019/051339
International Filing Date 06.12.2019
IPC
G01R 27/26 2006.01
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
27Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
26Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants
G06F 3/044 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
01Input arrangements or combined input and output arrangements for interaction between user and computer
03Arrangements for converting the position or the displacement of a member into a coded form
041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
044by capacitive means
CPC
G01D 5/2405
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
12using electric or magnetic means
14influencing the magnitude of a current or voltage
24by varying capacitance
2405by varying dielectric
G01N 27/221
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
02by investigating the impedance of the material
22by investigating capacitance
221by investigating the dielectric properties
G01V 3/088
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
3Electric or magnetic prospecting or detecting
08operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
088operating with electric fields
Applicants
  • KRUGER, George [AU]/[AU]
Inventors
  • KRUGER, George
Agents
  • FB RICE PTY LTD
Priority Data
62/775,93106.12.2018US
62/942,82603.12.2019US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CAPACITIVE SENSOR
(FR) CAPTEUR CAPACITIF
Abstract
(EN)
A capacitive sensor system for detecting an object. The capacitive sensing system includes a capacitive sensing pad, a conductive discriminating pad, a switch, a capacitance measurement circuit and a controller. The conductive discriminating pad is in proximity to the capacitive sensing pad. The switch includes an input terminal coupled to the discriminating pad. The switch selectively couples the discriminating pad to a voltage potential of the capacitive sensing pad or to a ground potential. The capacitance measurement circuit detects a capacitance value of the capacitive sensing pad. The controller is operable to measure the capacitance value of the capacitive sensing pad when the discriminating pad is coupled to the capacitive sensing pad voltage potential or to the ground potential.
(FR)
L'invention concerne un système de capteur capacitif permettant de détecter un objet. Le système de détection capacitive comprend une pastille de détection capacitive, une pastille discriminante conductrice, un commutateur, un circuit de mesure de capacité et un dispositif de commande. La pastille discriminante conductrice est située à proximité de la pastille de détection capacitive. Le commutateur comprend une borne d'entrée couplée à la pastille discriminante. Le commutateur couple sélectivement la pastille discriminante à un potentiel de tension de la pastille de détection capacitive ou à un potentiel de masse. Le circuit de mesure de capacité détecte une valeur de capacité de la pastille de détection capacitive. Le dispositif de commande peut servir à mesurer la valeur de capacité de la pastille de détection capacitive lorsque la pastille discriminante est couplée au potentiel de tension de pastille de détection capacitive ou au potentiel de masse.
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