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자료유형
학술저널
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한국멀티미디어학회 멀티미디어학회논문지 JOURNAL OF KOREA MULTIMEDIA SOCIETY Vol.9 No.12
발행연도
2006.12
수록면
1,572 - 1,579 (8page)

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An usual acoustic emission (AE) event has two widely characterized parameters in time domain, peak amplitude and event duration. But noise in AE measuring may disturb the signals with its parameters and aggrandize the signal incertitude. Experiment activity of detection of the nick inside of porcelain with AE was made and study on AE signal processing with statistic be presented in this paper in order to pick-up information expected from the signal with noise. Effort is concentrated on developing a novel arithmetic to improve extraction of the characteristic from stochastic signal and to enhance the veracity of detection. The main purpose discussed in this paper is to treat with signals on amplitudes with statistic mutuality and power density spectrum in frequency domain, and farther more to select samples for neural networks training by means of least-squares algorithm between real measuring signal and deterministic signals under laboratory condition. By seeking optimization with the algorithm, the parameters representing characteristic of the porcelain object are selected, while the stochastic interfere be weakened. then study for detection on neural networks is developed based on processing above.

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ABSTRACT
1. INTRODUCTION
2. SYSTEM STRUCTURE DESIGN
3. DIGITAL PROCESING UNIT
4. INTELLECTIVE SYSTEM DESIGN
5. EXPERIMENTATION IN DETAIL
6. CONCLUSIONS
7. REFERENCES

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