Papers by Author: Bin Jing

Abstract: The AU technique is employed in this paper to test the specimen which is made up of composite shell and adiabatic layer; the noise in the tested signal is reduced by adaptive filtering; Multi-resolution analysis of the signal is achieved by wavelet transform. By comparing the ratio of the energy of signal in different frequency zones to the total energy, the characteristic frequency zone of the signal is gained. The characteristic frequency zone of the signal from specimen is evaluated by energy integral Stress Wave Factor (SWF). Flaws are found effectively, and the size of flaw can be evaluated qualitatively. The validity of AU test for bond quality of the structure is approved in the experiments.

Abstract: This article proposed a rapid mobile robot self-localization method based on laser data, encoder data and azimuth compass data. This method can avoid tremendous error from pure mileage integral, and tremendous compute task from pure laser data registration after extract laser character. It only based on the similarity of adjacent laser data after pretreatment, then syncretized the estimated rotation angel and parallel displacement from encoder and azimuth compass, find the best transform with quasi Newton method. At last the mobile robot self-localization was realized. Experiment result demonstrated the reliability of this method.