Absolute capacitative encoder
AssigneesEverel Group S.P.A., Ers-Societa' A Responsabilita' Limitata
InventorsMarco BORGIANI, Diego CERIONI, Michele SQUICCIARINI
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Abstract
An absolute capacitative encoder includes a PCB, a plurality of conductive sectors that generate capacitors, a rotor mounted in revolving and/or axially translating mode with respect to the PCB, the rotor being made of dielectric material and having a peripheral slot in register with the conductive sectors, a control unit electrically connected to the conductive sectors in such manner to detect the capacity of each capacitor generated by the conductive sectors, the control unit being set in such manner to detect the capacity variation between the capacitors during the rotation and/or axial translation of the rotor in order to detect the angular and/or axial position of the rotor.
Claims10
An absolute capacitative encoder comprising:
- a stator;
- a plurality of conductive sectors mounted on said stator one next to the other, in such manner to generate a plurality of capacitors having said conductive sectors as armatures;
- a mobile element mounted in revolving and/or translating mode with respect to the stator, said mobile element having an indicator;
- and
- a control unit electrically connected to said stator conductive sectors in such manner to detect the capacity of each capacitor generated by the conductive sectors;
- characterized in that
- the indicator of the mobile element comprises a slot of the mobile element;
- the mobile element is configured in such manner to cover all stator capacitors when moving, except for one stator capacitor in correspondence of the indicator of the mobile element;
- and
- the control unit is set in such manner to detect the capacity variation between all stator capacitors covered by the mobile element and the only stator capacitor that is not covered by the mobile element in correspondence of the slot of the mobile element in such manner to identify the position of the indicator of the mobile element.
Dependencies are inferred from the claim text.