Hub-mountable wheel-rotation detector
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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Abstract
A hub-mountable wheel-rotation detector has an electromagnetic generator to convert rotational mechanical energy into electrical energy sufficient to recharge an internal rechargeable battery and power internal alarm and distance-tracking circuitry. The detector provides a combination of backup alarm and hubodometer functionality in a common device.
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Citations
10 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification