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Abstract
This paper presents a novel electrically passive level gauge suitable for use under industrial and other extreme conditions. The method exploits acoustics resonance of one- dimensional gas resonator. A low cost interferometric fiber- optic microphone is proposed as an acoustic pressure sensor and the acoustic power is delivered to the resonator by the acoustic waveguide. The distances over 120 m between the electrically passive sensor and the electrically active controller were experimentally demonstrated. The proposed method proves to be very robust and useful under heavy operating conditions.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Denis Donlagic "Electrically passive acoustic-resonance-level gauge", Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); https://doi.org/10.1117/12.349726
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