Fluid density and concentration measurement using noninvasive in

Details Fluid density and concentration measurement using noninvasive in Fluid density and concentration measurement using noninvasive in

1993-03-01

1994-10-25

Cosimano, Edward R.

Boots, shoes, and leggings

73 32A, 364550, 364558, G06F 1520

Patent

active

053595416

ABSTRACT:
The specific gravity or solute concentration of a process fluid solution located in a selected structure is determined by obtaining a resonance response spectrum of the fluid/structure over a range of frequencies that are outside the response of the structure itself. A fast fourier transform (FFT) of the resonance response spectrum is performed to form a set of FFT values. A peak value for the FFT values is determined, e.g., by curve fitting, to output a process parameter that is functionally related to the specific gravity and solute concentration of the process fluid solution. Calibration curves are required to correlate the peak FFT value over the range of expected specific gravities and solute concentrations in the selected structure.

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J. Dion et al., "Practical Ultrasonic Spectrometric Measurement of Solution Concentrations by a Tracking Technique," 37 IEEE Trans. Ultrason., Ferroelectrics, and Freq. Con., No. 2, pp. 190-195 (May 1990).
A. Loomis et al., "A Sonic Interferometer for Measuring Compressional Velocities in Liquids: A Precise Method," 17 J. Opt. Soc. Am., pp. 295-307 (1928).

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