Influence of Dynamic Response Characteristics of Sensors on Measurement Results

Abstract

Dynamic response characteristics of the sensors have an important effect on the accuracy of measurement results. Relevant studies about the dynamic response characteristics of sensors are carried out, which are mainly concern with the first-order measurement device represented by thermocouple and the second-order measurement device represented by pressure sensor. For temperature measurement with thermocouple, the theoretical expression of time constant and the corresponding relationship between measurement error and time constant are derived. For the pressure sensor, the corresponding relationship between the measurement error and the natural frequency is derived also. Formulas obtained in this paper can be used as the guideline for sensor selection and measurement error estimation.