An Effective Combination of Pre-Processing Technique and Deep Learning Algorithm for Hammering Sound Inspection
American Journal of Neural Networks and Applications
Volume 4, Issue 1, June 2018, Pages: 15-23
Received: Jul. 3, 2018;
Accepted: Aug. 6, 2018;
Published: Sep. 1, 2018
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Balage Don Hiroshan Lakmal, Department of Science and Engineering, Graduate School of Science and Technology, Gunma University, Gunma, Japan
Daisuke Oka, Department of Science and Engineering, Graduate School of Science and Technology, Gunma University, Gunma, Japan
Yoichi Shiraishi, Department of Science and Engineering, Graduate School of Science and Technology, Gunma University, Gunma, Japan
Kazuhiro Motegi, Department of Science and Engineering, Graduate School of Science and Technology, Gunma University, Gunma, Japan
This paper deals with the identification problem of defective products of door strikers installed in automobiles based on their hammering sounds. The difference of the hammering sounds between defective and acceptable products is very small and each sound signal has a unique pattern. The capabilities of conventional human sensory tests are not enough to identify such differences between these two classes. Hence it is suggested to apply deep learning algorithms (DLA) as per the versatility and feature extraction power. Usually, some kinds of pre-processing are adopted before the application of DLA in order to increase the accuracy of inspection as well as to reduce the training and the application time of DLA. In this paper, the combinations of five kinds of pre-processing techniques and three types of DLAs are applied to the actual hammering sounds inspection of door strikers. Especially in two types of DLAs, the sound data have been evaluated as images. The evaluation results show that the combination of the wavelet analysis and the Convolutional Neural Network (CNN) only attained the 100% accuracy of inspection with great response time. The wavelet analysis and the CNN are independently attain the high performances comparing with others and it is likely that they are useful in this kind of hammering sound inspections.
Balage Don Hiroshan Lakmal,
An Effective Combination of Pre-Processing Technique and Deep Learning Algorithm for Hammering Sound Inspection, American Journal of Neural Networks and Applications.
Vol. 4, No. 1,
2018, pp. 15-23.
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