Homework SourseA sensor transfer function follows this general form Sfsas53
A sensor transfer function follows this general form: S=f(s)=a(s-5)^3+bs^2+cs+d. If only the offset (intercept) is known, at least how many points are needed for calibration? Why?
Solution
1. Principle of dynamic calibration of a sensor at optimum uncertainty level
In the field of static calibration of pressure sensors, establishing traceability to the unit of
pressure presents no major problems. In the dynamic state, however, there is no standard of
\"dynamic pressure\" such as a \"standard pressure step\" or a \"standard pressure sine wave\"
with given frequency and amplitude. Using standard methods, it is not possible to \"link\" a
\"dynamic pressure standard\" metrologically to
\"static\" fundamental or derived quantities. In
this situation, calculation of uncertainty on the input quantity of a sensor cannot be
envisaged. For this reason the
Laboratoire de Métrologie Dynamique
(LMD) of
Arts et
Métiers ParisTech
has developed a specific method for dynamic calibration of a reference
sensor.
