Basics of Automation

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Resolution, non-linearity, accuracy

Resolution, non-linearity, accuracy

What resolution, non-linearity and accuracy mean

Did you know that the resolution, non-linearity and accuracy are among the most important features of a measuring sensor system? These vary significantly depending on the application requirement and the measuring principle. We will explain the terms now.

Basics of Automation – Resolution

Resolution

Basics of Automation – Non-linearity

Linearity deviation

Resolution is the smallest possible physical change which the measuring system can detect.

Non-linearity is the maximum deviation from a straight line that connects the zero point of a measuring range with the end point/ full scale. There is a linear relationship between the position or distance traveled and the output signal.

Resolution – High precision

High precision, poor accuracy

Resolution – Low precision

Low precision, good accuracy

Resolution – Accuracy

High precision + good accuracy = accuracy

Resolution – Multiple approach

Repeat accuracy

Accuracy is a measure of the agreement between measuring result and the true value for the measurand. Therefore high accuracy can only be achieved when the precision is high and the correctness is good. Another term in this connection is repeat accuracy. This results when a certain point is always approached under unchanged conditions.