A Computer Controlled Precision High Pressure Measuring System

Open access

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.

Heydemann, P. L. M., Welch, W. E. (1975). Piston gauges. In Le Neindre, B., Voder, B. (eds.) Experimental Thermodynamics. London: Butterworths, 147-201.

Yadav, S., Prakash, O., Gupta, V. K., Bandyopadhyay, A. K. (2007). The effect of pressure-transmitting fluids in the characterization of a controlled clearance piston gauge up to 1 GPa. Metrologia, 44, 222-233.

Sabuga, W., Bergogilo, M., Rabault, T., Waller, B., Torres, J. C., Olson, D. A., Agarwal, A., Kobata, T., Bandyopadhyay, A. K. (2005). Final report on Key comparison CCM.P-K7 in the range 10 MPa to 100 MPa of hydraulic gauge pressure. Metrologia (Tech. Suppl.), 42, 07005.

Driver, R. G., Olson, D. A., Yadav, S., Bandyopadhyay, A. K. (2006). Final report on APMP.SIM. M.P-K7: Bilateral comparison between NIST (USA) and NPLI (India) in the hydraulic pressure region 40 MPa to 200 MPa. Metrologia, 43, 07003.

Yadav, S., Bandyopadhyay, A. K., Dilawar, N., Gupta, A. C. (2002). Intercomparison of national hydraulic pressure standards up to 500 MPa. Measurement + Control, 35, 47-51.

Sabuga, W., Olson, D. A., Torres, J. C., Yadav, S., Jin, Y., Otal, P., Kobata, T. (2011). CCM key comparison for 500 MPa range of hydraulic gauge pressure (CCM.P-K13). In 5th CCM International Conference on Pressure Metrology (CCMP5), 2-5 May 2011, Berlin, Germany.

Yadav, S., Gupta, V. K., Prakash, O., Bandyopadhyay, A. K. (2005). Proficiency testing through interlaboratory comparison in the pressure range up to 70 MPa using pressure dial gauge as an artifact. Journal of Scientific and Industrial Research, 64 (10), 722-740.

Yadav, S., Prakash, O., Gupta, V. K., Kumaraswamy, B. V., Bandyopadhyay, A. K. (2008). Evaluation of interlaboratory performance through proficiency testing using pressure dial gauge in the hydraulic pressure measurement up to 70 MPa. MAPAN - Journal of Metrology Society of India, 23 (2), 79-99.

Birks, A. W. (1981). Strain gauge pressure transducer. Belfast: Queen's University of Belfast. (Internal Report No. 1566)

Kobata, T., Ide, K., Kajikawa, H., Sabuga, W., Scheppner, S., Schultz, W. (2010). Final report on supplementary comparison APMP. M.P-S8 in hydraulic gauge pressure from 100 MPa to 1000 MPa. Metrologia, 47, 07009.

Kumar, Y., Kumar, V., Jain, K. K., Kashyap, S. C. (1999). A capacitive pressure gauge as a reliable transfer pressure standards. Sensors and Actuators, B55, 217-221.

Juanarena, D. W., Keeter, S., Albert, W. C. A monolithic quartz resonator pressure transducer for high accuracy and stability pressure measurement. Application note P0001. www.pressuresystems.com

Yadav, S., Bandyopadhyay, A. K., Gupta, V. K., Gupta, A. C. (2001). A reliable quartz digital transfer pressure standard for high pressure measurements up to 275 MPa. Journal of the Instrument Society of India, 30 (1), 43-51.

Kobata, T., Bandyopadhyay, A. K., Moore, K., Eltawil, A. A. E., Woo, S. Y., Chan, T. K., Jian, W., Man, J., Con, N. N., Fatt, C. S., Permana, W., Aldammd, M., Sabuga, W., Changpan, T., Hung, C. C., Pengcheng, Z. (2005). Final report on Key comparison APMP. M.P-K7 in hydraulic gauge pressure from 10 MPa to 100 MPa. Metrologia (Tech. Suppl.), 42, 07006.

Busse, D. W. (1987). Quartz transducers for precision under pressure. Mechanical Engineering, 109 (5).

Yadav, S., Vijayakumar, D. A., Bandyopadhyay, A. K., Gupta, A. C. (2000). A proposal for the establishment of measurement uncertainty of pressure dial gauges and transducers. Cal Lab: The International Journal of Metrology, 6 (2).

Yadav, S., Gupta, V. K., Prakash, O., Bandyopadhyay, A. K. (2005). Evaluation of associated uncertainties in calibration of direct pressure indicating electromechanical devices. Measurement Science Review, 5, 104-114.

Yadav, S., Gupta, V. K., Bandyopadhyay, A. K. (2010). Investigations on measurement uncertainty and stability of pressure dial gauges and transducers. Measurement Science Review, 10 (4), 130-135.

Measurement Science Review

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

Journal Information

IMPACT FACTOR 2017: 1.345
5-year IMPACT FACTOR: 1.253

CiteScore 2017: 1.61

SCImago Journal Rank (SJR) 2017: 0.441
Source Normalized Impact per Paper (SNIP) 2017: 0.936

Cited By


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 164 164 6
PDF Downloads 47 47 2