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WIRELESS SOURCELESS SENSOR

  • US 20080129482A1
  • Filed: 11/16/2007
  • Published: 06/05/2008
  • Est. Priority Date: 02/09/2006
  • Status: Active Grant
First Claim
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1. A wireless sourceless sensor, comprising:

  • an electrodynamic generator adapted to induce a first electrical signal in response to a substantially planar movement of a carrier, a first magnet, or a second magnet between a first position and a second position that causes a change in a magnetic field direction in the carrier, the substantially planar movement caused by an event in a vehicle;

    where the carrier comprises a metal core and a wire loop wrapped around the metal core, the first magnet has a first magnetic polarity, and the second magnet has a second magnetic polarity, the second magnet positioned such that the second magnetic polarity is substantially opposite of the first magnetic polarity;

    a power conditioning circuit electrically coupled to the electrodynamic generator, the power conditioning circuit adapted to rectify and regulate the first electrical signal into a second electrical signal, the second electrical signal comprising a substantially constant voltage;

    an encryption circuit electrically coupled to the electrodynamic generator and the power conditioning circuit, the encryption circuit sourced by the second electrical signal and adapted to encode a unique message in a data packet; and

    a radio frequency transmitter electrically coupled to the encryption circuit, the radio frequency transmitter sourced by the second electrical signal and adapted to transmit the data packet.

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