NASA NTRS · 19860000024
Microwave Sensor Measures Turbopump Speed
Abstract
Sensor does not perturb flow and immune to cavitation. Reflected microwave signal is amplitude-modulated by passing reflective facets of nut on rotating shaft. Modulation frequency measured to find rotational speed. Device measures rotational speed of turbopump without obstructing flow.
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Maram, J. M., Wyett, L.. 1986-06-01. Microwave Sensor Measures Turbopump Speed. https://ntrs.nasa.gov/citations/19860000024
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