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Mass measurement using an intensity-modulated optical fiber sensor
Authors:Hossein Golnabi  
Institution:

Institute of Water and Energy, Sharif University of Technology, P.O. Box 11365-8639, Tehran, Iran

Abstract:Design and operation of an opto-mechanical sensor for mass measurements is reported. This device uses a pair of optical fibers and a reflecting coated lens. The light intensity modulation is based on the relative motion of the lens due to a given mass with respect to the optical fibers. The modulated intensity because of the weighing mass has been measured by using a digital voltmeter. A full-range sensitivity of about 11.5 mV/g for a dynamic range of 80 g is obtained. A mass resolution of better than 0.25 g has been measured with this device. The measured output response is checked against the expected theoretical one and a general agreement observed. A comparison with similar experimental results shows some advantages of this method and potential use of such a sensor for medium mass measurements.
Keywords:Sensor  Mass measurement  Fiber optic  Intensity modulation
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