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Wireless monitoring system with a self-powered transmitter

  • US 8,035,498 B2
  • Filed: 08/08/2007
  • Issued: 10/11/2011
  • Est. Priority Date: 08/15/2006
  • Status: Active Grant
First Claim
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1. An apparatus for a wireless monitoring system, said apparatus comprising:

  • at least one transmitting unit includingan inductor responsive to a magnetic field from a magnet attached to a moving component,a storage unit connected to said inductor, said storage unit storing energy generated from an interaction between said inductor and said magnet,a transmitter powered by said storage unit, anda sensor responsive to said magnet, said magnet causing said sensor to provide a trigger signal to said transmitter when said magnet is proximate said sensor, said trigger signal causing said transmitter to transmit a signal wirelessly, said transmitter receiving power from said storage unit to transmit said signal, said signal including a series of pulses with each pulse corresponding to when said magnet is positioned proximate to said sensor; and

    a receiving unit includinga receiver responsive to said signal from said transmitter,a unit for decoding said signal received by said receiver, said unit determining a time value equal to a time difference between two successive signals from said transmitter, anda display unit for displaying a parameter value associated with said moving component, said parameter value related to said time value.

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