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Cam Contour Recognition and Measurement Analysis

Author: CuiMingDi
Tutor: SuiZhen
School: Jilin University
Course: Pattern Recognition and Intelligent Systems
Keywords: measurement of contour curve the theoretical contour curve data fitting discrete time signal sampling the similarity function the relevant function phase difference
CLC: TP274
Type: Master's thesis
Year: 2012
Downloads: 48
Quote: 0
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Abstract


Because of the measurement of the starting position is uncertain. The cam contourmeasurement and recognition have difficulty. So in the measurement and testing subjectareas the cam contour measurement and recognition is a research hotspot.In the cam contourrecognition process. The most effect of processing results is that a cam contour with theoryof phase difference. But in the phase difference calculation and calculation, thecorresponding theory is not perfect. Otherwise, even if the measured profile data obtained isvery accurate, May also be due to the calculation of cam phase difference theory is notperfect and defect, make for cam phase difference calculation result is not accurate. Thusaffecting the cam of the final measured that the results inaccurate and the grinding camforming system caused by wrong understanding and improvement.On the basis of previous theory and based on the measurement results and theoreticallift of cam comparison and in addition to mechanical error analysis, numerical analysis, inthe field of signal processing theory and application of the integrated molding. Put forward anew data processing method to determine the cam phase difference.Multi point method of data fitting is error processing and numerical analysis theoryintegrated with the cross. Mainly through the numerical analysis to calculate the theoreticalangle under the actual lift value and to compared with the theoretical value to calculate thephase difference. After the phase adjusted and according to the theory of error handling erroranalysis to calculate the final results.Discrete time signal processing method is the cross of error processing disciplines andsignal processing disciplines. As the cam the final detection result in perspective is of somediscrete points. Theoretical lift is also a number of discrete points. The discrete point throughthe numerical analysis, then uses to get spaced discrete points. The discrete point similar tothe signal processing what has not been quantified in discrete time domain signal andthrough the signal processing in the field of theory. Processing the two kinds of discrete timesignal and finally get the cam phase difference. The theory of similarity function to calculate the cam phase is the mathematical fieldand error processing in combination with cross. The cam contour and the actual contour withthe interpolation function and to get the measurement of contour curve and the theoreticalcontour curve. As a result of the two curves have properties of function. The two curvesusing the similarity method to find the most similar position to calculate the cam phase.Function related method is the cross of mathematics and signal processing and errorprocessing. First, through the theory of mathematics to get the theory curve and the actualcontour curve. Through the signal processing signal related theory to get the most relevantposition of two functions to calculate the cam phase.Then by means of treatment methods are compared. Identify the different methodsapplied to which different measurement environment. Finally gives examples of processingand processing method program.

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