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Object Morphology Detection Research Based on AVR

Author: XiaMeng
Tutor: YuXianTao
School: Wuhan University of Technology
Course: Measuring Technology and Instruments
Keywords: Wheelset LabVIEW Laser triangulation Curve fitting
CLC: U279.32
Type: Master's thesis
Year: 2010
Downloads: 201
Quote: 1
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Abstract

Round, is one of the main factors that affect the safe operation of trains on the important parts of the locomotive running gear. From the inception of the railway, the railway transport has been doing outstanding contributions to the development of the world economy, especially the second industrial revolution, laid the foundation for the world's road to industrialization. Machine wheels on vehicles running important parts connected with the railroad tracks, railway safe and stable transport occupies an extremely important position, the wheel on the reliability of a direct impact on the efficiency and safety of the railway transport. Wheel of traditional detection methods rely on manual, long measurement time, the measurement accuracy is low and the high rate of false detection. In our country, the train wheel Dimension also commonly used calipers and other traditional tools to measure, such a low efficiency of the measurement of the contact is very backward, causing some hidden safe driving of the motorcycle. Thesis Wheel Tread detection technology at home and abroad in this regard detection method were discussed. Analyze and compare a variety of domestic and international round on the basis of the detection technology, a laser ranging sensors measuring wheel tread distance sensor baseline wheel tread curve fitting. The first part discusses the background and significance of this study, in the wheel tread and wheel on the current domestic and international exposition of the detection methods and the research status, investigate laser displacement measurement method on non-contact detection application and significance. The second part discusses the basic principle of the wheel tread detection system machine wheels aspects of the the tread basic knowledge, laser triangulation ranging principle and the basic principles of curve fitting. The third part of the overall hardware design of this detection system, including the AVR microcontroller minimum system design, the photoelectric data collection system design, motion control system design and USB data storage system design. The fourth part of the host computer the LabVIEW data analysis, system design, including the design of the front panel and the block diagram. The fifth part is the analysis of the systematic errors, the system is composed of hardware system and software system of the host computer, the hardware structure, the stepper motor with displacement between China and Taiwan ball screw drive wheel in the weight of the extrusion damage surface shape is ever-changing, and these can cause system errors, and how to avoid systematic errors is the study of the chapter content.

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