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Energy Harvester Device For Autonomous Intracorporeal Capsule

  • US 20120283807A1
  • Filed: 05/04/2012
  • Published: 11/08/2012
  • Est. Priority Date: 05/04/2011
  • Status: Active Grant
First Claim
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1. An autonomous intracorporeal leadless capsule, comprising a body having an exterior and an interior, electronic circuit disposed in said interior and an energy harvesting circuit disposed in said interior, comprising:

  • a transducer for energy harvesting, for converting an external physical effect applied to the capsule body into an electrical charge, this transducer comprising;

    a first capacitor electrode (50), coupled to movable actuation member receiving said external physical effect, said movable actuation member actuation being substantially free of an oscillating weight and comprising a deformable surface (42), on the exterior of the body, said deformable surface being deformed in a first direction and a second direction opposite said first direction in response to an affect of pressure variations in a medium surrounding the body, anda second capacitor electrode (54), mounted on a support (56) connected to a region of the body other than the movable actuation member, the first and second capacitor electrodes having respective surfaces positioned in vis-à

    -vis separated by a dielectric gap together defining a capacitor (C), and said pressure variation, producing a correlative modification of said surfaces in vis-à

    -vis and/or of said dielectric gap with correlative variation of the capacity of said capacitor; and

    an energy storage and management circuit, powered by the energy harvester transducer in response to a reduction in surfaces in vis-à

    -vis and/or an increase of the dielectric gap of the capacitor,wherein said deformable surface (42) is coupled to the first capacitor electrode by a mechanical high-pass filter for pressure variations in the medium surrounding the capsule.

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