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Measurement Science Review

The Journal of Institute of Measurement Science of Slovak Academy of Sciences

6 Issues per year


IMPACT FACTOR 2016: 1.344

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1335-8871
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Volume 11, Issue 6 (Jan 2011)

Issues

A Computer Controlled Precision High Pressure Measuring System

S. Sadana
  • Electronics and Electrical Engineering Department (EEED), Thapar University, Patiala, Punjab, India
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/ S. Yadav
  • National Physical Laboratory (NPLI), Council of Scientific and Industrial Research (CSIR), New Delhi - 110 012, India
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  • De Gruyter OnlineGoogle Scholar
/ N. Jha / V. Gupta
  • National Physical Laboratory (NPLI), Council of Scientific and Industrial Research (CSIR), New Delhi - 110 012, India
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  • De Gruyter OnlineGoogle Scholar
/ R. Agarwal
  • National Physical Laboratory (NPLI), Council of Scientific and Industrial Research (CSIR), New Delhi - 110 012, India
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/ A. Bandyopadhyay
  • National Physical Laboratory (NPLI), Council of Scientific and Industrial Research (CSIR), New Delhi - 110 012, India
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/ T. Saxena
  • National Physical Laboratory (NPLI), Council of Scientific and Industrial Research (CSIR), New Delhi - 110 012, India
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Published Online: 2011-12-21 | DOI: https://doi.org/10.2478/v10048-011-0037-7

A Computer Controlled Precision High Pressure Measuring System

A microcontroller (AT89C51) based electronics has been designed and developed for high precision calibrator based on Digiquartz pressure transducer (DQPT) for the measurement of high hydrostatic pressure up to 275 MPa. The input signal from DQPT is converted into a square wave form and multiplied through frequency multiplier circuit over 10 times to input frequency. This input frequency is multiplied by a factor of ten using phased lock loop. Octal buffer is used to store the calculated frequency, which in turn is fed to microcontroller AT89C51 interfaced with a liquid crystal display for the display of frequency as well as corresponding pressure in user friendly units. The electronics developed is interfaced with a computer using RS232 for automatic data acquisition, computation and storage. The data is acquired by programming in Visual Basic 6.0. This system is interfaced with the PC to make it a computer controlled system. The system is capable of measuring the frequency up to 4 MHz with a resolution of 0.01 Hz and the pressure up to 275 MPa with a resolution of 0.001 MPa within measurement uncertainty of 0.025%. The details on the hardware of the pressure measuring system, associated electronics, software and calibration are discussed in this paper.

Keywords: Digital pressure calibrator; computer controlled pressure measurements; precision high pressure measuring system; pressure sensor; pressure transducer

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About the article


Published Online: 2011-12-21

Published in Print: 2011-01-01


Citation Information: Measurement Science Review, ISSN (Online) 1335-8871, DOI: https://doi.org/10.2478/v10048-011-0037-7.

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