WEB-based Geometric Error Evaluation System Filtering Technique

The filtering operation is a key operator in the operator of a new generation of GPS operation. Geometric error evaluation process, the extracted signal often contains noise, as much as possible through the filtering operation to reduce the interference signal, and removing unwanted information, characterized in order to obtain more accurate information, the accuracy of the provided data for the next step of fitting and evaluation of operation. Promote the new generation of GPS filtering is the collection error digitized field of metrology is an important direction.Subject to a new generation of GPS standard system-oriented product the geometric error digitized measurement process the filtering operation, carefully studied the current international standards of filter, two filters are given in accordance with the object processing and assessment parameters difference:Profile filtering and regional filtering, this article explains the working principle and application of the law of the contour filtering and regional filtering. The current the universal filter such as Gaussian filter wave, spline filter and spline wavelet filter, the working principle and application of environmental advantages and disadvantages are analyzed and discussed, and in recent years the HHT filtering techniques in geometric error evaluation application is launched. On this basis, the development of web-based product geometric error evaluation system filtering operation application platform. The main contents are as follows:(1) GPS operation technology theory and application of basic researchThe surface model of the new generation of GPS, operation and operator technology, constant class and its description of the digitized technology, the technical solutions based on the new generation of GPS the geometric error digitized measurement certification.(2) contour filtering and regional filtering application technology researchElaborated the working principle and application of the law of the contour filtering and regional filtering. Universal filter, such as Gaussian filter wave, spline filter and spline wavelet filters, etc. The working principle and application of environmental advantages and disadvantages analyzed and discussed the introduction of the HHT-based filtering operation technology, its new generation of GPS filtering operation launched a feasibility study on the basis of the analysis of the comprehensive study, filter selection rules.(3) filtering operation technology based web geometric error evaluation systemIn order to achieve the new generation of GPS errors of digital measurement and diagnosis system network, research and the establishment of a web-based product geometric errors preliminary assessment system architecture, the key technology of the Web system development, design web-based filtering operation Application Platform.In summary, the subject of the filtering operation for next-generation GPS standard system, outline filtering and filtering theory and application technology research for the choice of filter proposed uniform rules, and the development of web-based filtering operating application platform, geometric error for speeding up product improvement and extension of the standard system has a positive meaning.