Dual-coil geophone accelerometer

摘要

An apparatus and a method for detecting vibration are disclosed. The apparatus comprises a housing, a magnetic structure forming a magnetic field in the housing, and a coil structure in the magnetic field, concentric of the magnetic structure. In response to external vibration, the coil structure and the magnetic structure are movable with respect to each other. The coil structure comprises at least two sets of coils overlapped in space, of which a first coil set is for detecting vibration and a second coil set is for applying control in accordance with a control signal.

主权项

1. An apparatus for detecting vibration, said apparatus comprising:
a housing; a magnetic structure forming a magnetic field in the housing; and a coil structure comprising at least a first and a second set of coils in said magnetic field, each of said first and second sets of coils comprising a first end and a second end for signal processing circuitry connection, said at least first and second sets of coils overlapped in space being concentric with the magnetic structure; wherein in response to said vibration, said coil structure and said magnetic structure are movable with respect to each other with the moving directions unparallel to the directions of the magnetic flux of the magnetic field.