Ultrasonic transducer with a horn and phased array using such ultrasonic transducers

摘要

This invention relates to an ultrasonic transducer (10;11) comprising an ultrasonic transducer part (10';11') having a height and a width, and at least one horn part (10'';11'') having one outside end and the other end attached to the ultrasonic transducer part (10';11'), at least the height or the width of the outside end of the horn part (10'';11'') being smaller than the height or the width of the ultrasonic transducer part (10';11'). This type of ultrasonic transducers are advantageously used in an ultrasonic transducer phased array for emitting/receiving ultrasonic waves in a scanning zone, in which the centers of adjacent outside ends of the horn parts (10'';11'') are spaced from each other by a distance of about, or inferior to, half the wavelength (λ/2) of the emitted ultrasonic radiation (Shannon Law).;Such an ultrasonic transducer array permits to solve prior art technical problems in terms of scanning speed, precision, cost and power, and are well adapted for applications as robot or vehicle guidance.