Volume 34 Issue 10
Oct.  2009
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DAI Hong. Improvement of Plate-gauge Flatness Calibration and Data Processing[J]. Geomatics and Information Science of Wuhan University, 2009, 34(10): 1210-1213.
Citation: DAI Hong. Improvement of Plate-gauge Flatness Calibration and Data Processing[J]. Geomatics and Information Science of Wuhan University, 2009, 34(10): 1210-1213.
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Improvement of Plate-gauge Flatness Calibration and Data Processing

  • 1School of Electronic and Electrical Engineering,Shanghai Second Polytechnic University,2360 Jinhai Road,Shanghai 202109,China

Funds: 上海市教育委员会重点学科基金资助项目(J51801)；国家863计划资助项目(2007AA12Z312)
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  • Received Date: August 11, 2009
  • Revised Date: August 11, 2009
  • Published Date: October 04, 2009
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  • The Calibration Specification of Plate-gauge(JJG 117-2005) included in National Metrology Testing Regulation issured in 2005 is studied,in which the results given in an example of appendix A is analyzed.The results show that the loop closures induced by the errors of observation data are too large and a same measuring point has several different solutions.In this paper,in order to solve the problems,the tolerance formula of the loop closures is derived based on the surveying error theory;an improved bridge device is developed and a modified operational sequence for calibrating plate-gauge by pitch method is presented;as well as the method of least squares adjustment is adopted for observation data processing.The results of an experiment for the calibration demonstrate that the improvements made in this paper can significantly increase the level of accuracy and reliability of the calibration.
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