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Piezoresistive torque sensor

  • US 7,011,326 B1
  • Filed: 09/15/2000
  • Issued: 03/14/2006
  • Est. Priority Date: 09/16/1999
  • Status: Expired due to Fees
First Claim
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1. An automotive steering system comprising:

  • a shaft linked to a set of road wheels, the shaft including a slot parallel to the axis of the shaft and located at a single peripheral location about the surface of the shaft;

    a piezoresistive sensor positioned within and along the length of the slot and responsive as a cantilever beam to torque applied to the shaft and operative thereby to provide as output a signal indicative of the applied torque;

    a controller in signal communication with the sensor and operative thereby to accept as input from the sensor the signal indicative of the torque applied to the shaft; and

    a motor coupled to the shaft and in signal communication with the controller and operative thereby to accept as input from the controller a command to apply torque to the shaft.

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