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This application note describes how UDOP can correct in real-time the aliasing contained in a measurement.
Two methods are presented. The first one is based on some a priori knowledge and the second one is based on a new method we developed, based on two different PRF values.
Show this application note on aliasing correctionIn pulsed Doppler ultrasound, it takes some time to get the velocity information. If the flow conditions change during the measurement time, some essential assumptions in the computation procedure of the velocity are no more valid.
This application note points out the influence of some parameters on the quality of the computed velocity profile.
Show this application note on transient flowsWhen ultrasonic waves encounter an interface, the waves are reflected and refracted like in optics.
This application note will let you evaluate the amount of energy contained in the reflected and refracted waves
Show this application note on intensity of US wavesThe demodulated echo signals are the basic signals from which ultrasonic information are extracted. A good understanding on these signals will help to perform better measurement.
Show this application noteFor each sampling volume, a single velocity value is given. This single value results from the computation of the mean power spectrum of the Doppler signal, which is a statistical value.
This application note explains how to get more information on the Doppler content inside a single gate.
Show this application noteOne of the main advantages of UDV is its ability to realize velocity measurement without disturbing the flow, by placing the ultrasonic transducer outside and crossing the wall of the container. Crossing walls is unfortunately not without influences.
This application note describes the different phenomena that may appear when the waves pass through a wall.
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