Title :
Self-monitoring sonar transducer array with internal accelerometers
Author :
Musha, Takaaki ; Uchida, Hiroshi ; Nagashima, M.
Author_Institution :
Tech. R & D Inst., Japan Defense Agency, Yokosuka, Japan
fDate :
1/1/2002 12:00:00 AM
Abstract :
To achieve the maximum detection range for active sonars, it is desirable to maximize their acoustic power. In attempting to do so, there are two limitations which are caused by cavitation on the face of the transducer and an interaction effect between transducer elements of the array. To avoid these limitations, a method is proposed for driving the array elements in phase with a uniform velocity to yield the desired radiation. For this purpose, a sonar transducer array which has internal accelerometers for monitoring the motion of the transducer element is being developed. This paper presents an outline of this sonar array and a method of high-speed numerical calculation which was developed for the prediction of the radiation characteristics of the array using the fractional Fourier transform algorithm
Keywords :
accelerometers; discrete Fourier transforms; finite element analysis; sonar arrays; sonar detection; ultrasonic transducer arrays; DFT algorithm; acoustic pressure; active sonars; cavitation; directivity; finite element model; fractional Fourier transform algorithm; high-speed numerical calculation; internal accelerometers; maximum acoustic power; maximum detection range; radiation characteristics; self-monitoring sonar transducer array; sonar radiation pattern; transducer interaction effect; uniform velocity; Accelerometers; Acoustic arrays; Acoustic signal detection; Acoustic transducers; Face detection; Monitoring; Phased arrays; Piezoelectric transducers; Sonar detection; Surface acoustic waves;
Journal_Title :
Oceanic Engineering, IEEE Journal of
