Fiber optic sensor with an optical modulator having a permanent magnet for the detection of the movement or position of a magnetic component

摘要: A fiber optic sensor for the detection of position or movement a component, example speed rotation shaft, is described, which particularly suitable use in coarse environment. The optical modulator comprises permanent magnet and part, and/or part being mounted so as to be movable relative transmitting receiving light guide. change caused by generator, causes course field lines emanating from corresponding whereby greater lesser proportion radiated out modulated transmitted into fiber. modulation according intensity, color polarization then utilized measure appropriately analyzed.