Wavefront Generation Using a Dense Array and Multidimensional ΔΣ Modulation

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概要

• 論文の詳細を見る

• We propose a new digital to analogue (DA) conversion technique for acoustical transducer arrays. This technique utilizes the multidimensional band-limited property of array signals. Using the technique, a large dynamic-range wavefront is converted to multiple 1-bit waveforms which are over-sampled temporally and spatially. The 1-bit waveforms are fed into a dense array of transducers. The acoustical wavefront transmitted from the array is approximately equal to the original wavefront, because the spatial high frequency components are eliminated by band-limitation due to wave propagation. This paper describes an over-sampling technique using two dimensional (2-D) ΔΣ modulation for 1-D and 2-D arrays. Results of simulations are presented for evaluation and demonstration of the applicability of the proposed method.

• 社団法人応用物理学会の論文
• 1997-05-30

著者

• Okada Mitsuru

  Graduate School Of Engineering Yamagata University

• TAMURA Yasutaka

  Graduate School of Engineering, Yamagata University

• Akasaka Osamu

  Graduate School Of Engineering Yamagata University

関連論文

• Ultrasonic Time-of-Flight Computed Tomography for Investigation of Wooden Pillars: Image Reconstruction from Incomplete Time-of-Flight Profiles
• Three-Dimensional Imaging System Using Ultrasonic Encoded Wavefront : High Speed Computation and Array Geometry
• Wavefront Generation Using a Dense Array and Multidimensional ΔΣ Modulation

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