| magnet for determining position. The measuring principle of POSICHRON® position sensors is based on two physical effects: the Wiedemann effect and the Villari effect. To create the Wiedemann effect, a current impulse is sent through the POSICHRON® positional sensor's wave guide. This current impulse generates a circular magnetic field which propagates at the speed of light around the wave guide. If this circular magnetic field !: : : ■■; I ■■: ,.:[ ■■■■■ magnet which is moved lengthways, a torsional mechanical-elastic density wave is triggered at the magnetostriction. This wave propagates in the POSICHRON® position sensor at ultrasonic speed. The sensor head of the POSiCHRON®positlon sensor contains a detector which detects the arrival of this wave Therndqrii.'".jil.:Mi: Viilrfn i-lii;<:: is ubed as the ■ncthac o' delect c" I ne position between the detector coil and Ihn mae;n«r w"i<jh can be moved enqihways rt'n--q th« POSICHRON" spnsnr is oele'm.ned by -№№m>i":) Hie irr« :i "nwnt:e b«r»«ei the electrical induction cu"e-r imputes and t-e vcitage pulse ge-e'ated v-a the ViMan effect m the detector coil (time-of-flight principle). This time difference can be converted using various well-known methods into analogue or digital output signals. The time-of-flight signals can however also be evaluated directly by commonly-available interface modules or industrial counter and time-industrial measuring devices. |