Characterization of and correction for pressure-measurement installation
P. M. Winroth · KTH Publication Database DiVA (KTH Royal Institute of Technology) · 2017
A method to experimentally determine the dynamic characteristics of pressure measurement installations has been developed and tested. The method involves pressurising a volume enclosed by a rubber membrane until the membrane burst, generating a negative pressure step. The natural frequency and damping ratio of the system can then be found through analysis of the step response of the measurement system. An example showing how it is possible to compensate for the dynamic characteristics of the installation, for qualitative measurements of highly dynamic processes is also given. This is done by modelling the system as an acoustic oscillator. Since the model requires that the time derivative of the signal is taken it amplifies noise in the signal, meaning that the quantitative values of the corrected measurements should be handled with care.