mätspolen

A mätspole, often translated as a measuring coil or sense coil, is an electrical component used to detect changes in magnetic flux. It consists of a coil of wire, typically wound around a core material that enhances magnetic field sensitivity. When a magnetic field passing through the coil changes in strength or direction, an electromotive force (EMF), or voltage, is induced across the coil's terminals according to Faraday's law of induction. This induced voltage is proportional to the rate of change of the magnetic flux.

The primary function of a mätspole is to act as a sensor for magnetic phenomena. They are commonly employed in applications where the measurement or detection of magnetic fields is crucial. For example, in electrical engineering, mätspolar can be used to monitor current flow in conductors, as the current generates a magnetic field. By placing a mätspole near a conductor, changes in current can be inferred from the induced voltage.

Another significant application is in the field of non-destructive testing (NDT), particularly in magnetic particle inspection (MPI). Here, mätspolar can be used to detect the presence of magnetic field distortions caused by surface or near-surface defects in ferromagnetic materials. These distortions are indicative of flaws such as cracks or inclusions. Mätspolar are also found in various scientific instruments for measuring magnetic field strength and variations, contributing to research and development in physics and engineering. Their sensitivity and simplicity make them a versatile tool for magnetic sensing.