ULTRASONIC TRANSDUCER, METHOD FOR ASSEMBLING SAME AND FLOWMETER COMPRISING AT LEAST ONE SUCH TRANSDUCER

摘要

The invention concerns an ultrasonic transducer (38) comprising: - at least one piezoelectric wafer having two parallel planar main faces: a front face and a rear face, - at least one rear plate having two parallel planar main faces: a forward face and a backward face, the forward face of said rear plate extending facing and in contact with the rear face of the piezoelectric wafer, characterised in that: - the rear plate has a thickness of between three and seven times the thickness of the piezoelectric wafer, - the rear plate has an acoustic impedance of between 10 MPa.s.m-1 and 35 MPa.s.m-1. The invention concerns a method for assembling such a transducer (38) and a flowmeter comprising at least one such transducer (38).