The need for reliable dynamic measurements and characterization of pressure transducers are important, especially in the fields of aerospace, defense and machinery manufacturing. Such measurements are performed on systems in which input pressure varies over time and must accurately capture the dynamic variations in pressure over short time intervals. This study presents a research work and measurements on the dynamic calibration of pressure transducers using a drop mass system and a high-speed impact tester. The impact test machine also uses the drop mass principle similar to some secondary level dynamic measurement instruments. The pulses which are produced by the impact test machine can be used as a dynamic pressure generator for the test and characterization of pressure transducers. For this purpose, a new experimental calibration setup was constructed on the impact test machine. The dynamic behaviors of pressure transducers were investigated using pulses obtained from varying dropping speeds and energies of the drop mass in this new setup. Experimental results were compared with the results obtained from a manual drop mass pulse generator. Results show that while there is some variance about 15% at 200 MPa as the variance becomes less than 5% at 300, 400, and 500 MPa. As a result, it is concluded that an impact test machine can be used as a reliable dynamic pulse generator.
Journal of the Brazilian Society of Mechanical Sciences and Engineering – Springer Journals
Published: Mar 25, 2017
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