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Systems and methods for shielding a hand sensor system in a steering wheel

  • US 10,124,823 B2
  • Filed: 05/22/2015
  • Issued: 11/13/2018
  • Est. Priority Date: 05/22/2014
  • Status: Active Grant
First Claim
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1. A system for shielding a hand sensor system in a steering wheel comprising:

  • a power source in communication with the hand sensor system;

    a sensor mat comprising one or more capacitive sensing loops having respectively separate connections to the power source wherein each of the sensing loops receives, from the power source, a respective sensing voltage signal that defines a respective sensing zone in the sensor mat, and wherein the sensor mat transmits at least one presence signal from at least one of the sensor loops back to the power source to indicate a presence of an input in at least one of the sensing zones;

    a heater mat disposed between a steering wheel frame and the sensor mat, the heater mat comprising one or more heating conductive loops connected to the power source, wherein the power source transmits a heating current to at least one of the heating conductive loops upon receiving the presence signal;

    a shielding mat positioned between the heater mat and the sensor mat, the shielding mat comprising one or more shielding conductive loops having respectively separate connections to the power source wherein each of the shielding conductive loops receives a discrete shielding voltage signal from the power source, wherein the shielding conductive loops define respective shielding zones in the shielding mat,wherein at least one of the sensing zones and at least one of the shielding zones occupy corresponding positions along the steering wheel, and the shielding zones shield the sensing zones from interference.

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