Set Up For Ultrasound
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Description
- Obtained noodle samples with varying thicknesses by stacking
- Excited the transmitted transducer with a short positive voltage spike generated from the ultrasonic pulse generator/receiver to produce an ultrasonic pulse that was transmitted through the noodle specimen. The second transducer (receiver) detected the pulse.
- Amplified the transmitted pulse with a signal amplifier in the ultrasonic pulse generator/receiver, and averaged the transmitted pulse (120 times) using the average function of the oscilloscope. This reduced random noise and increased the signal-to-noise ratio.
- After being downloaded to a computer, the pulse was filtered (bandwidth 30 - 50 kHz) and the pulse's transit time and amplitude was taken from the first dip of each filtered waveform.
- Determined the ultrasonic velocity from the plots of the transit time of the ultrasonic pulse against dough thickness.
- Obtained the signal attenuation coefficient from a plot of the intensity of ultrasonic signal as a function of dough thickness.
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Set Up For Ultrasound
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