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An Alternative Optical Method for Acoustic Resonance Detection in HID Lamps

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3 Author(s)
Walter Kaiser ; Escola Politécnica, University of São Paulo, São Paulo, Brazil ; Ricardo Paulino Marques ; Alexander Fern├índez Correa

Acoustic resonances are observed in high-pressure discharge lamps operated with ac input modulated power frequencies in the kilohertz range. This paper describes an optical resonance detection method for high-intensity discharge lamps using computer-controlled cameras and image processing software. Experimental results showing acoustic resonances in high-pressure sodium lamps are presented.

Published in:

IEEE Transactions on Industry Applications  (Volume:47 ,  Issue: 3 )