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Systems and methods for reducing rotation noise in a magnetoelastic device and measuring torque, speed, and orientation

  • US 10,254,181 B2
  • Filed: 03/26/2015
  • Issued: 04/09/2019
  • Est. Priority Date: 03/26/2014
  • Status: Active Grant
First Claim
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1. A method for manufacturing a magnetoelastic torque sensing device, the method comprising the steps of:

  • positioning a solenoid formed around a permanently magnetized core in proximity to a magnetoelastic element;

    rotating the magnetoelastic element about a central axis whereby an initial magnetically conditioned region is formed at a first location on the magnetoelastic element;

    measuring magnetic fields produced by various portions of the initial magnetically conditioned region;

    calculating one or more adjustment factors based on the measured magnetic fields wherein the adjustment factors comprise an offset angle; and

    rotating the magnetoelastic element about the central axis while applying an electrical current to the solenoid whereby a final magnetically conditioned region is formed at the first location on the magnetoelastic element, wherein the electrical current that is applied is adjusted based on the adjustment factors during the rotation of the magnetoelastic element.

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