Acoustic Imaging of Solid Objects in Air Using a Small Set of Transducers: III. Experimental Demonstration
We describe an alogrithm that produces three-dimensional acoustic images of simple objects in air using an array containing only a small number of transducers. Each transducer provides a pulse-echo measurement in an apropriate incident direction. Our algorithm uses entire waveforms (i.e., it is not limited to simple time-of-flight measurement), and is based on the Kirchhoff approximation together with the assumption that the scatterer is a rigid body. We further assume that the body is flat-bottomed with its upper surface represented by a single-value elevation function. The imaging alogrithm employs an interative technique involving smoothing and linearization at each stage. Evaluation of the imaging algorithm by means of synthetic and experimental test data will be discussed.
KeywordsMeasurement Model Localization Domain Solid Object Imaging Algorithm Acoustic Image
Unable to display preview. Download preview PDF.
- Richardson, J.M. and Marsh, K.A., 1984, “Acoustic Imaging of Solid Objects in Air Using a Small Set of Transducers,” Proc. of 1984 IEEE Ultrasonics Symp., p. 83.Google Scholar
- Richardson, J.M. and Marsh, K.A., 1985, “Acoustic Imaging of Solid Objects in Air Using a Small Set of Transducers II. Probabilistic Ambiguities and Selection of Transducer Configurations,” presented at 1985 IEEE Ultrasonics Symp.Google Scholar