Towards Automated Visual Inspection and Classification of Micro-Parts
The mechanical manufacturing of micro-parts is a challenging field of research. Because of high quality requirements and small tolerances, manufacturing processes have to be very stable and precise. In order to achieve high precision a suitable quality assurance concept is required. Only measured features can be used for statistical process control (SPC). Therefore, this paper presents a concept of an automated visual inspection and classification methods for micro-parts. Using confocal laser scanning microscopy, high-resolution 3D-height maps with depth selectivity are obtained. The identification of surface imperfections is done with a set of conventional image processing techniques. Afterwards, these kinds of surface defects are classified by the use of classification methods like decision trees.
Using multi layer perceptron network to classify road cracks
In this paper a method for classifying cracks in asphalt road by using multi layer Perceptron (MLP) neural network is proposed. Training data are road images which are taken from road surface in 30 degree. The RGB images are first changed to gray scale and then binary images are produced by using proper threshold gray level. The structure of network has three layers as input, hidden and output. The network is trained to perform tasks such as pattern recognition. The training rule is categorized as back propagation method and learning method is supervised. After training the network, it classifies each image to longitudinal, transverse, blocks, Alligator and others.
A numerical study on liquid ring motion and fragmentation for the initial process of liquid explosive dispersal
For the explosive dispersal on liquid fuel of FAE technique, the expansion of gaseous detonation products, axisymmetric radial extension and fragmentation of a liquid ring were analyzed, then corresponding models were established. By those models coupled, the numerical simulation on motion and fragmentation of the liquid ring exerted by strong action was carried out. The results computed show that the models established are feasible, and present study can offer initial conditions for the numerical simulation on the process of liquid secondary breakup and gas-liquid mixing.