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Vimalajuliet, A.
- Micro Size Ultrasonic Transducer for Marine Applications
Authors
1 School of Electrical and Electronics, Faculty of Engineering and Technology, SRM University, IN
Source
Indian Journal of Science and Technology, Vol 4, No 1 (2011), Pagination: 8-11Abstract
We address the advancement and development of MEMS ultrasonic transducer for underwater applications. The development of MEMS transducer is investigated and proved that it is a viable concept. The flexibility in tailoring their frequency and acoustic impedance increases the potential of their application in various fields. Compared to conventional, MEMS offer the advantage of superior performance as far as bandwidth is concerned. In spite of their lower coupling coefficient, there is a potential for significant improvement. We present the latest design of the piezoelectric, pressure and capacitive transducers. The material employed, method utilized in development, performance and capacity of each transducer is presented. Finally, the importance and needs for modeling and simulation is discussed. Currently we design and modeling a micro size transducer in Intellisuite software.Keywords
MEMS, Acoustics Transducer, Underwater ApplicationsFull Text
References
- Akasheh F, Myers T and Fraser A (2004) Development of piezoelectric micro-machined ultrasonic transducers. Sensors Actuators A. 1, 275-287.
- Aravamudhan S and Bhansali S (2008) Reinforced piezoresistive pressure sensor for ocean depth measurements. Sensors Actuators A. 142, 111–117.
- Arshad MR (2009) Recent advancement in sensor technology for underwater applications. Indian J. Marine Sci. 38(3), 267-273.
- Bernstein JJ, Houston K, Niles LC, Finberg SL, Chen, HD, Cross LE, Li KK and Udayakumar K (1997) Micro-machined high frequency ferroelectric sonar transducers. IEEE Trans. on ultrasonics, ferroelectrics & frequency control. 44(5), 960- 969.
- Chowdhury S, Ahmadi M and William C. Miller (2002) Design of a MEMS acoustical beamforming sensor array. IEEE Sensors J. 2, 6-11
- Ito M, Okada N and Takabe M (2008) High sensitivity ultrasonic sensor for hydrophone applications using an epitaxial PZT fil grown on SrRuO3/Pt/_-Al2O3/Si. Sensors Actuators A. 1, 278-282.
- Jin X, Ladabaum I, Butrus T and Khuri-Yakub (1998) The micro-fabrication of capacitive ultrasonic transducers. J. Micro electromech. Sys. 7, 3-9.
- Mescher M, Houston K and Bernstein J (2002) Novel MEMS micro-shell transducer arrays for high-resolution underwater acoustic imaging applications. Proc. of the IEEE Sensors. 1, 541-546.
- Oralkan O, Sanli Ergun A and Khuri- Yakuh T (2002) Capacitive micromachined ultrasonic transducers: Next generation arrays for acoustic imaging? IEEE Trans. on Ultrasonics Ferroelectrics & Frequency Control. 49, 11-16.
- Zhu B and Varadan VK (2002) Integrated MOSFET based hydrophone device for underwater applications. Proc. of SPIE, 4700, 101-110.
- Analysis of Marine Sensor Signals in Fast Time Domain Processing
Authors
1 School of Electrical and Electronics, SRM University, IN
Source
Wireless Communication, Vol 1, No 5 (2009), Pagination: 210-215Abstract
Synthetic aperture sonar (SAS), a new emerging marine system and an enabling technology, is based on storing successive snapshots of the target's scene and processing the collected data. Advancing the speed and robustness of image reconstruction is greatly desired, this paper describes imaging algorithm, computation time and image signal to noise ratio. It gives an introduction to the time domain beamforming (TDB) and aperture processing. We initially look at the fundamental processing constraints that limit the frequency domain beamforming(FDB) technique. TDB technique has been successfully used instronomy, satellite, aircraft borne radar and used for AUV based mine hunting and numerous other applications. Its resolution is independent of range, which making available a wide signal processing trade-space. During the past few years, we have been applying synthetic aperture processing techniques to sonar. In this study, the use of TDB is investigated and concluded that it is very effective in removing the effects and restoring the focus of images. The algorithms can be outlined using the MATLAB.
