ERRORS OF MEASURE
The sensor,first element
of the chain of measure is the decisive source of the electrical signal that
the rest of the chain has to treaty and to exploit The adaptation of the sensor
and the chain of measure implies that this does not add to the initial uncertainty
signal or superior limitations to those bring by the sensor. It is therefore
the quality of the sensor that in the first place on the one hand, the most
or less good concordance between measured value and true value of the @@mesurande.
And on the other hand, them limit the uncertainty on the value measured.
The only @@mesurandes whose value is perfectly known are stallion magnitudes
since their value is fixed by convention. The value of any other @@mesurande
can be known only after processing by a chain of measure. It is the true value
of the @@mesurande that determines the excitement of the sensor, but the experiment
man has access only to the global reply of the chain of measure : this reply,
expressed in unit of the @@mesurande, is the value measured. The gap between
the true value and the measured value is the error of measure: this is haveed
especially to imperfections of the chain of measure that degrades the information
of the signal in the course of its processing.