Influence function as a metrological characteristic of the digital pressure meter

Abstract

Abstract The influence of external factors and uninformative parameters of the input signal on the measurement results was evaluated. The main metrological characteristics of the digital pressure meter IDC-2-Micro are given and the design features of the pressure measurement system are described in its example. The principle of operation of a strain-resistant pressure sensor is considered. As a result of their deformation, the output voltage of the bridge is generated, which is proportional to the measured pressure. External factors that have the maximum impact on the metrological characteristics of the pressure meter were selected and the limits of their values were set. 8 factors were identified: ambient air temperature and the measured medium, changes in operating overpressure, ambient humidity, vibrations, frequency of the supply voltage and fluctuations in its values, the presence of an external electromagnetic field. A plan for a factor experiment to evaluate the influence function has been developed. When studying the influence of various factors, including their pair interactions, on the parameter under study using the random balance method, a type of regression equation is proposed. When studying the influence of various factors, including their paired interactions, on the parameter under study, the method of random balance was used.