| 摘要 |
FIELD: medical engineering. SUBSTANCE: device has ultrasonic module driver without transmission mechanism as electromagnetic system, power coil is directly mounted on traveling system. Shoes have tore and half-tore shape, permanent magnet attached to the half-tore, magnetic core composed of two strips which middle plane is in perpendicular relation to the central plane of the tore and ring attached to it. The device has two photosensor units mounted symmetrically with respect to traveling system, photodiodes and light emitting diodes axes are in perpendicular relation to scanning axis and separated with rotatable diaphragms being flangings with Archimedes spiral slits and making an angle of 87-89 deg with the scanning axis. The spirals are counter-inclined to exclude axial deviation influence over transducer readings. Frame current supply lines and piezoelectric modules are manufactured as two wear resistant contact pairs symmetrically mounted so that central fixed contact axles ending in half-spheres belong to the scanning axis and thrust against springing flat movable contacts. EFFECT: improved quality of images; enhanced accuracy of diagnosis. |
