Magnetic beam flow sensor

摘要

A magnetic sensor for measuring a physical property that can be translated into the flexing of a beam. The sensor includes a support extending outward from a base to a distal portion. A beam is fixed to the distal portion and extends inward therefrom to a free end of the beam adjacent the base. A pair of matched magnetic sensing elements are mounted on the base adjacent the free end of the beam which is nominally centered between the sensing elements. A magnetic field means is disposed against the magnetic sensing elements and at the free end of the beam. The free end of the beam is resiliently connected with the base through the beam and the support whereby force applied against the beam may move the free end closer to one and further from the other of the sensing elements. A differential signal is generated between the sensing elements by connecting a driving means to the sensing elements. The differential signal indicates the various positions of the free end of the beam. The positions of the free end can be used to determine various characteristics of the applied force.