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dc.contributor.authorGasulla Forner, Manuel
dc.contributor.authorLi, Xiujun
dc.contributor.authorMeijer, Gerard C. M.
dc.contributor.authorVan der Ham, Lucas
dc.contributor.authorSpronck, Jo W.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica
dc.identifier.citationGasulla Forner, M.; Li, Xiujun; Meijer, Gerard C. M... et al. A contactless capacitive angular-position sensor. IEEE Sensors Journal, 2003, Vol. 3, No. 5, 607-614
dc.description.abstractThis paper presents an absolute capacitive angular-position sensor with a contactless rotor. The sensor is mainly composed of three parts: the capacitive sensing element, a signal processor, and a microcontroller. The electrically floating rotor can be either conductive or dielectric. For the dielectric material, we chose plastic, and for the conductive rotor, we chose aluminum. The sensing element has a redundant structure, which reduces mechanical nonidealities. The signal processor has a multicapacitance input and a single output, which is a period-modulated square-wave voltage. The microcontroller acquires output data from the processor and sends them to a PC, which calculates the rotor position. Theoretical analysis, supported by experimental results, show that the sensitivity to mechanical nonidealities of the sensing element is higher in the case of a conductive rotor. The resolution of the capacitive angular-position sensor over the full range (360/spl deg/) was better than 1". The measured nonlinearity was /spl plusmn/ 100" and /spl plusmn/ 300" for the dielectric and the conductive rotor, respectively.
dc.publisherInstitute of Electrical and Electronics Engineers
dc.subjectÀrees temàtiques de la UPC::Enginyeria electrònica::Instrumentació i mesura::Sensors i actuadors
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal
dc.subject.lcshSignal processing
dc.subject.otherAbsolute position encoder
dc.subject.otherAngular position measurement
dc.subject.otherCapacitance measurement
dc.subject.otherCapacitive sensor
dc.subject.otherContactless angle encoder
dc.subject.otherRotary position
dc.titleA contactless capacitive angular-position sensor
dc.subject.lemacProcessament del senyal
dc.contributor.groupUniversitat Politècnica de Catalunya. GRUP ISI - Grup d'Instrumentació, Sensors i Interfícies
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access

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