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Method and system for detecting steering wheel contact

  • US 9,840,275 B2
  • Filed: 06/12/2014
  • Issued: 12/12/2017
  • Est. Priority Date: 06/13/2013
  • Status: Active Grant
First Claim
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1. A method for detecting steering wheel contact, comprising:

  • transmitting a test signal to a power assisted steering system to initiate application of a test torque to a steering wheel over a period of time, the test signal comprising a sinusoidal wave with a frequency and amplitude an amplitude;

    receiving, from a torque sensor, measurement signals indicative of actual steering wheel torque over the period of time;

    comparing the actual torque to an expected torque to determine a phase shift in at least one of amplitude and frequency between the test signal and the received measurement signals; and

    determining whether a user is in contact with the steering wheel based on the comparison and the determined phase shift.

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