Characterization of quartz Bourdon-type high-pressure transducers

摘要

The characteristics of commercially available pressure monitors were evaluated. The pressure range of these pressure monitors is up to 100 MPa and the resolution of the transducer is 0.1 kPa. The pressure monitor includes a quartz Bourdon-type high-precision electronic pressure transducer inside the body. The sensing element of the transducer is a precision quartz crystal resonator and the frequency of oscillation varies with pressure-induced stress. In total, six pressure monitors were prepared for this study. During 15 months, the six monitors were calibrated simultaneously using a hydraulic pressure balance 11 times in total. The effects on the readings of the monitors by setting parameters and environmental conditions were evaluated. The important characteristics for the pressure transducer such as the temperature coefficient of the span reading and long-term stability were also evaluated quantitatively. From the evaluation results, the behaviours of the transducers during the period were well characterized. The standard deviation of the relative deviations from the least-squares best-fitting function for each pressure transducer was less than 6 X 10~(-6) in the pressure range of 30 MPa to 100 MPa and had a maximum of 11 X 10~(-6) at 10 MPa. In this article, the details of the characterization are described.