Excitation of solids e.g. powders, sieves, surfaces and tubes with ultrasound to minimize surface friction during relative movement, first applies ultrasonic tuning to find optimum working point

摘要

A generator, ultrasound converter and a mechanical system to be excited are connected. A range of frequencies is scanned, to establish a working point. This operation comprises sensor-measurement of a voltage and/or current consumed by the generator, to determine power delivery to the system, at each frequency in the range. Ultrasound excitation is then applied at the working point determined, avoiding any deviation from it, or from the conditions of determination An independent claim is included for corresponding equipment.