Measuring principle

The measuring principle is based on a physical measurement. This term is defined in the standard DIN 1319, which defines the key terms in metrology.

The length of a few physical parameters, which is accessible at least in the millimeter to meter range by the application of a scale of a measurement. Using calipers, ruler or tape measure is the respective measured value can be read. For other sizes of the people ( " about five seconds " ) has developed a limited quantitative sense, such as time, temperature ( " lukewarm" ) and ground ( " More than two kilograms "). Most physical quantities can not detect with his senses. Therefore, measuring devices are developed, transform a measured variable in the easy to read size of a length or an angle or in the easily processable size of an electrical voltage, etc..

" The measuring principle allows to measure instead of the measured variable of a different size to determine its value from the unique to the measurand. It is based on an ever -recoverable physical appearance ( phenomenon effect) with known regularity between the measured variable and the other variable ".

The practical application of the measuring principle leads to a measurement method and in its concrete execution on a measuring device. Is the measured quantity is transferred to a detectable measurement signal. For example, temperature, pressure or force measurements are transmitted to simple length measurements; the length is read directly from a scale. Other physical parameters are mapped to an electrical resistance, a time, a number of voltage pulses, etc.. Depending on requirements, several measurement principles are applied successively.

In the choice of the measuring principle linearity between the measured variable ( input variable) and the actually measurable quantity ( output ) is most often sought. Then can specify by a constant sensitivity of the context.

Swell

• Measurement