Location and curvature estimation of spherical targets using multiple sonar time-of-flight measurements
IEEE Transactions on Instrumentation and Measurement
Institute of Electrical and Electronics Engineers
1212 - 1223
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A novel, flexible, three-dimensional multisensor sonar system is described to localize the center of a generalized spherical target and estimate its radius of curvature. Point, line, and planar targets are included as limiting cases which are important for the characterization of a mobile robot's environment. Sensitivity analysis of the curvature estimate with respect to measurement errors and some of the system parameters is provided. The analysis is verified experimentally for specularly reflecting cylindrical and planar targets. Typical accuracies in range and azimuth are 0.17 mm and 0.1°, respectively. Accuracy of the curvature estimate depends on the target type and system parameters such as transducer separation and operating range.
Maximum likelihood estimation
Robot sensing systems
Sonar position measurement
Time of flight measurements
Published Version (Please cite this version)http://dx.doi.org/10.1109/19.816139
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