Project Number: 6408-13000-020-04
Project Type: Reimbursable

Start Date: May 01, 2008
End Date: Apr 30, 2009

Objective:
Find the most appropriate operational parameters for a high frequency (5-20 MHz) acoustic device to be used for the measurement of fine (0.1-64 µm.)

Approach:
Identify the most appropriate frequency for the attenuation measurement of particles in the range 0.1-64 µm. Identify the best path length to use for attenuation measurement, balancing the needs of instrument size, accuracy, and range of measurements. Assess the influence of particle size on the attenuation measurement. Quantify the accuracy of the chosen best configuration. Determine the operational limits of the technique. This will vary with frequency and separation distance. Determine the best physical configuration of the sensor(s): one transducer used to propagate and measure reflection from a target at a fixed distance and 2 transducers in a pitch-and-catch configuration will be tested.