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Power drive unit with unit load device sensor

  • US 7,199,543 B1
  • Filed: 12/13/2005
  • Issued: 04/03/2007
  • Est. Priority Date: 12/13/2005
  • Status: Expired due to Fees
First Claim
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1. A cargo power drive unit comprising:

  • a motor;

    at least one driver roller element coupled to said motor;

    a light transmitter for emitting light;

    a light receiver for measuring light;

    an analog-to-digital converter configured to receive an analog signal output by the light receiver and convert the analog signal into a digital signal having more than two possible values;

    a processor coupled to said motor and said transmitter and said receiver, the processor receiving output from the receiver via the analog-to-digital converter; and

    memory coupled to said processor, said memory storing instructions that, when executed by said processor, cause said processor to determine the presence of a cargo container relative to the cargo power drive unit based on a calculation of reflected light and a measurement of ambient light.

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