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With the wide application of computer technology in the field of machinery manufacturing , precision and ultra - precision processing technology has made tremendous development , as well as precision machining parts have become increasingly demanding , precision machining accuracy depends mainly on the measurement accuracy to ensure measurement of the workpiece , which put forward higher requirements . Cylindricity measurement is necessary to have the measurement reference , under normal circumstances , the reference error is sufficiently small to be ignored, while for ultra-precision measurement , the reference error and accuracy of the workpiece shape errors have the same magnitude , measurement can not be ignored . Extracted from the shape of the workpiece error , error separation technique to design a high-precision cylindrical measurement system . Research projects include an analysis of the existing Cylindrical Measuring principles and techniques to explore ways to improve Cylindrical Measuring system to study the error separation technique Cylindrical Measuring system . This article first introduced the basic principles of the error separation technique and Research , analyzed from the shape error of mixed-signal extraction cylindricity error . Secondly, the overall design of the data acquisition board , to completed the corresponding acquisition system hardware and software design , to achieve the original signal sampling , A / D conversion , filtering and storage , the preparation of a data acquisition board and the PC between serial communication program. Finally, the preparation of the the cylindrical error data processing program , the use of algorithms shape error and other mixed - error signal phase separation , the result of the separation was evaluated , and the cylindrical three-dimensional model of the original morphology can be reconstructed displayed using the OpenGL library . Through the experiment, the feasibility , accuracy and precision of the measurement system requirements have been met, the system can quickly complete error data collection , separation , reconstruction and evaluation , cylindrical three-dimensional graphics , visual display can also be realized . This system improves the the cylindrical degree of measurement accuracy , improve the measurement instrument detection accuracy .
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