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Hub-mountable wheel-rotation detector

  • US 10,352,723 B2
  • Filed: 08/28/2017
  • Issued: 07/16/2019
  • Est. Priority Date: 08/29/2016
  • Status: Expired due to Fees
First Claim
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1. A hub-mountable wheel-rotation detector for determining a direction of rotation of a wheel, the hub-mountable wheel-rotation detector comprising:

  • a housing;

    a polyphase electromagnetic generator mounted inside the housing to produce multiple phase-displaced electrical output signals in response to the rotation of the wheel, the multiple phase-displaced electrical output signals providing a first set of phase-displaced waveforms in response to clockwise rotation of the wheel and a second set of phase-displaced waveforms in response to counterclockwise rotation of the wheel, the second set of phase-displaced waveforms having a phase displacement that is different from that of the first set of phase-displaced waveforms;

    a rechargeable battery mounted inside the housing and electrically coupled to the polyphase electromagnetic generator for receiving energy from one or more of the multiple phase-displaced electrical output signals supplying electrical charge to the rechargeable battery in response to the rotation of the wheel; and

    wheel-rotation detector circuitry mounted in the housing and electrically coupled to receive power from the rechargeable battery, the wheel-rotation detector circuitry configured to determine the direction of the rotation of the wheel based on different phase displacements between the first and second sets of phase-displaced waveforms.

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