DSP BASED READ OUT SYSTEM FOR CONTACTLESS HIGH-FREQUENCY INDUCTIVE POSITION SENSORS

• Abstract:

  This paper presents a precise and low cost absolute position inductive measurement system for rough industrial environments. This transducer works on similar principles as contactless resolvers but consists of a rectangular antenna PCB, a passive LC resonance target and a signal processing unit. The read out electronics utilize undersampling to demodulate the transducer in{phase and quadrature output signals. Furthermore, the corresponding position is estimated from a lookup table (LUT) to avoid singularities in the inverse tangent and cotangent calculation. The mechanical transducer arrangement, signal condition electronics design and measured results will be presented.
• Keywords:

  inductive sensor, contactless, undersampling, quadrature, synchronous demodulation
• Download:

  IMEKO-WC-2012-TC7-O13.pdf
• DOI:

  _unreg_wc-2012.TC7-O13

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