초록 ▼

An underwater sonar transducer includes a centrally located beam with a plurality of stacks of piezoelectric transducer elements extending from each side, with a rigid end beam at the opposite end of each stack. A plurality of bolts extending from one end beam to the other on opposite sides of the s

An underwater sonar transducer includes a centrally located beam with a plurality of stacks of piezoelectric transducer elements extending from each side, with a rigid end beam at the opposite end of each stack. A plurality of bolts extending from one end beam to the other on opposite sides of the stacks are tightened to apply a desired amount of prestress on the ceramic stacks. Arcuate radiating elements are welded to opposite sides of each end beam, end cap members are fastened to the centrally located beam at each end of the transducer and a jacket of elastomeric material is bonded to the edges of the end cap members to prevent ingress of fluid into the piezoelectric elements. Energizing of the piezoelectric elements causes expansion and contraction of the stacks, pushing the end beams in and out and causing bowing of the radiating elements to project sonar energy.

대표청구항 ▼

An underwater flextensional sonar transducer including a hollow shell of elliptic cross section and a stack of piezo-electric transducer elements placed in said shell such that, when energized, they tend to vibrate along the major axis of said shell, characterized in that said transducer comprises a

An underwater flextensional sonar transducer including a hollow shell of elliptic cross section and a stack of piezo-electric transducer elements placed in said shell such that, when energized, they tend to vibrate along the major axis of said shell, characterized in that said transducer comprises a rigid end beam at each end of said stack with bolts connected between said end beams and tightened to produce a desired amount of compressive presetress in said stack, a pair of arcuate radiating elements, each having one edge fastened to one of said end beams and another edge fastened to the other of said end beams such that expansion and contraction of said stack when energized is transformed into large motions of said arcuate radiating elements, cap members extending between the ends of said end beams, and a jacket of elastomeric material covering said cap members, said end beams and said radiating elements.