Motion activated power source
AssigneeKinergi Pty Ltd
InventorGeorge Cap
Life of this patent
Estimating the term…
Abstract
An electrical generator or motion sensor including a) a pair of elongated L shaped supports (15) fixed at one end but free to move at the other b) a coil (14) secured to the supports remote from the fixed end c) an array of permanent magnets (12) arranged adjacent the coil such that movement of the coil through the magnetic field induces an electric current in the coil. To rectify the current the supports are made of a piezoelectric polymer membrane so that movement of the coil stresses the membrane to generate a voltage that is used to turn on a MOSFET transistor rectifier.
Claims8
An electrical generator which includes
- a) an elongated support fixed at one end but free to move or flex
- b) a coil with electric outputs secured to said elongated support remote from the fixed end
- c) a magnetic field adjacent the coil such that movement of the coil induces an electric current.
A rectification device for a parasitic energy harvester in which vibration or motion induces relative movement between a coil and a magnet to induce an electric current in the coil in which a piezo electric membrane is incorporated into the support for either the magnet and/or the coil so that the vibration or motion also produces a voltage in the piezoelectric membrane sufficient to power the rectification of the voltage produced by the relative movement between the coil and the magnet.
A motion sensor which includes
- a) a body portion
- b) an elongated support fixed at one end to said body portion but free to move or flex in response to movement or vibration or said body
- c) a coil secured to said elongated support remote from the fixed end, siad coil having electric outputs
- d) a magnetic field adjacent the coil such that movement of the coil induces an electric current which is indicative of the degree of motion of the body.
Dependencies are inferred from the claim text.