Apparatus for measuring the velocity of low frequency vibrations
AssigneeBanyaszati Kutato Intezet
InventorsFerenc Meckl, Peter Piuk
Life of this patent
Estimating the term…
Abstract
The invention concerns apparatus for measuring the velocity of low frequency mechanical vibrations, comprising two springs between which a vibratable mass is secured, two electric coils mechanically coupled to the mass, a permanent magnet core in each coil which is stationary relative to its associated coil, one coil being a measuring coil while the other is a feedback coil; and a current generator having a control input to which the measuring coil is connected while the feedback coil is connected to the generator output, the connection polarities being so selected as to produce negative feedback.
Claims4
Apparatus for measuring the velocity of low frequency mechanical vibrations, comprising at least one spring means, a vibratable mass secured to said spring means, at least two coils mechanically coupled to said mass, a core for each coil of a permanent magnetic material, said cores being stationary relative to said coils, at least one of said coils serving as a measuring coil, while at least one other coil is a feedback coil, a controllable current generator having a control input and an output, said measuring coil being connected to said control input and said feedback coil being connected to said output, the current fed through said feedback coil by said current generator being of the same direction as the current generated in said feedback coil by the vibration of said mass.
Dependencies are inferred from the claim text.