Method and apparatus for detecting a magnetic field using the piezoelectric effect and the Lorentz force

摘要

(57) It is a method and apparatus for sensing the magnitude of magnetic flux density magnetic field (25) and / or the presence of magnetic fields Abstract]. DC current to flow in a first direction the first layer is added to (20) a first layer of conductive material a DC voltage. The second layer of piezoelectric material made and integrated into the first layer, or adjacent to the first layer or placing it in contact. I is positioned in a magnetic field or exposure to a magnetic field the first and second layers. Thus, the Lorentz force is generated in a direction substantially perpendicular to the second direction of the magnetic field and the first direction of the first preferred current, deflected piezoelectric, a voltage is outputted in response to the Lorentz force. Flux density is calculated as a function of the piezoelectric output.