Linear position-displacement magnetostrictive transducer having multiple cylindrical electromagnets for generating flux, each electromagnet having a centered passageway for relative travel along the same magnetostrictive waveguide

摘要

When observing or setting changeable positions of respective movable components of a machine, such as movable saws of a multiple cut sawing machine, each linear position-displacement transducer used has the wave guide housing thereof, made of sufficient length to receive, instead of one permanent magnet, several overall cylindrical electromagnets serving as flux generators. Each electromagnet: has a centered hole, to permit the movement thereof along the wave guide; and has four electromagnets equally radially spaced in a radial plane, with their commonly positioned north poles, forming an overall central north pole, surrounding the center hole, which is formed by a non ferrous tube, and with their radially spaced south poles being adjacent to an encircling soft iron band. This band serves as a 360 degree target for flux radiating from the overall central north pole, and as a heat sink, thereby strengthening and enhancing the radiation signal pattern bombarding the wave guide housing, when the overall cylindrical electromagnet is being energized to serve in determining the location of the machinery component to which it is attached.