<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

A Computer Controlled Precision High Pressure Measuring System

National Physical Laboratory (NPLI), Council of Scientific and Industrial Research (CSIR), New Delhi - 110 012, India

Electronics and Electrical Engineering Department (EEED), Thapar University, Patiala, Punjab, India

Department of Electronics, University of Delhi South Campus, New Delhi 110 021, India

Measurement Science Review

{"article-title":"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...

A Computer Controlled Precision High Pressure Measuring System

Published Online: Dec 21, 2011

Page range: 198 - 202

DOI: https://doi.org/10.2478/v10048-011-0037-7

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

This content is open access.

A Computer Controlled Precision High Pressure Measuring System

Published Online: Dec 21, 2011

Page range: 198 - 202

DOI: https://doi.org/10.2478/v10048-011-0037-7

KeywordsDigital pressure calibrator, computer controlled pressure measurements, precision high pressure measuring system, pressure sensor, pressure transducer

This content is open access.

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