ULTRASONIC SCANNING CONVERTER Russian patent published in 1995 - IPC

FIELD: medicine. SUBSTANCE: transformer is formed by movable semi-annular cores disposed inside rotor. Windings of the cores are connected to corresponding piezoelectric converters. Motionless semi-annular core of the transformer has intermediate magnetic circuits disposed onto its edges in form of arcs of circle. Exciting signals enter from generator the primary winding located onto motionless core and then they enter the secondary winding of only this movably core which has magnetic flux to be closed through intermediate magnetic circuits. The other piezoelectric converters are switched off at that time as magnetic flux is absent in their cores because of large air gaps. Exclusion of commutator permits to reduce sizes of working part of scanning device and to widen diagnostic capabilities. EFFECT: improved efficiency. 3 dwg