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A Study of Image Calibration to Pressure Gauge

Author: RenLiXia
Tutor: QiuZongMing；GuoYanZhen
School: Xi'an University of Technology
Course: Measuring Technology and Instruments
Keywords: Image Measurement Pressure gauge test Showing the value of automatic identification
CLC: TH812
Type: Master's thesis
Year: 2002
Downloads: 208
Quote: 1
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Abstract


Stress is the production process and scientific experiments to measure and control the basic parameters. Pressure measuring instruments in the production and research in wide range of applications . To ensure the accuracy of the pressure measurement , pressure measurement instruments must be according to certain requirements for regular checks. Experienced a manual test gauge calibration and automatic verification of two phases. Currently gauge automatic verification status is still relatively backward , how to solve the problem of automatic verification has been plagued by domestic researchers . To improve this situation , the development of an efficient, stable and accurate pressure gauge automatic verification system has become a realistic task. In recent years, image measurement gradually applied to all walks of life . This article discusses the characteristics of digital image measurement , advantages and applications, combined with the actual situation and theoretical analysis to determine the use of optical imaging systems and image processing, identification technology, automatic identification of the gauge pointer and reticle options for resolving the pressure indication value problem of automatic verification , developed a set of computer image processing and recognition , automatic control and optical technology in one of the pressure indicates that the value of automatic verification system . This system uses the basic idea of image processing , using a series of processing methods, such as characteristics under illumination and dial using different binarization methods ; according to the image of the lines in the most important ideas of image filtering using mathematical morphology filtering methods ; proposed the use according to the line characteristics linear fitting method . After a lot of experiments to prove this system a high degree of automation , repeatability, accuracy verification requirements for pressure indicates that the value of the automatic verification provides a practical solution.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Thermal measuring instruments > Pressure gauge
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