Ultrasound Doppler Effect (Ultrasonic Experiment Set 6)

Investigation of the essential dependencies of the Doppler frequency shift on transmission frequency, angle of incidence and flow velocity

The ultrasound Doppler effect is used in a variety of measuring devices in both industry and medicine. These include devices for flow measurement, for characterizing blood flow and the fetal Doppler for measuring fetal heart sounds. The set contains the necessary components to set up a flow circuit with adjustable flow speeds, an ultrasound pulse Doppler with probes of different frequencies as a measuring device and software for signal recording and signal processing. This allows the essential dependencies of the Doppler frequency shift on the transmission frequency, angle of incidence and flow speed to be investigated. The flow sections of different diameters contained in the circuit and the riser pipes enable experiments on the flow laws. These include the continuity equation and the Hagen-Poiseuille law. The flow speed is measured using the Doppler device and the pressure drops are measured using the riser pipes. By adding the Doppler probe and the arm model, experiments on Doppler sonography (application of the ultrasound Doppler effect in medicine) can be carried out.

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