A Partial Hierarchical Model for Online Low-Resolution Wear Particle Images Classification

Author:

Guo Xuxu12ORCID,Tan Rui3,Yang Mingyang4,He Xinrong3,Guo Jia3,Fan Suli12ORCID,Hu Junnan12ORCID,Zhang Taohong12ORCID,Wulamu Aziguli12

Affiliation:

1. Department of Computer, School of Computer and Communication Engineering, University of Science and Technology Beijing (USTB), Beijing 100083, China

2. Beijing Key Laboratory of Knowledge Engineering for Materials Science, Beijing 100083, China

3. China Energy Investment Corporation Science and Technology Research Institute Co., Ltd., Nanjing 210033, China

4. China State Key Laboratory of Tribology, School of Mechanical Engineering, Tsinghua University, Beijing 100084, China

Abstract

Wear particle image analysis is an effective method to detect wear condition of mechanical devices. However, the recognition accuracy and recognition efficiency for online wear particle automatic recognition are always mutual restricted because the online wear particle images have almost no texture information and lack clarity. Especially for confusing fatigue wear particles and sliding wear particles, the online recognition is a challenging task. Based on this requirement, a super-resolution reconstruct technique and partial hierarchical convolutional neural network, SR-PHnet, is proposed to classify wear particles in one step. The structure of this network is composed by three modules, one is super-resolution layer module, the second is convolutional neural network classifier module, and the third is support vector machine (SVM) classifier module. The classification result of the second module is partial input to the third module for precision classification of fatigue and sliding particles. In addition, a new feature of radial edge factor (REF) is put forward to target fatigue and sliding wear particles. The test result shows that the new feature has the capability to distinguish fatigue and sliding particles well and time saving. The comparison experiments of the convolution neural network (CNN) method, support vector machine method (SVM) with and without REF feature, and integrated model of back-propagation (BP) and CNN are produced. The comparison results show that the online recognition speed and online recognition rate of the proposed SR-PHnet model in this paper are both improved markedly, especially for fatigue and sliding wear particles.

Funder

National Study Abroad Fund of China

Publisher

Hindawi Limited

Subject

General Mathematics,General Medicine,General Neuroscience,General Computer Science

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