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Ultrasonic fluid measurement method

  • US 8,201,446 B2
  • Filed: 07/14/2008
  • Issued: 06/19/2012
  • Est. Priority Date: 07/20/2007
  • Status: Active Grant
First Claim
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1. A method of measuring fluid level in an aircraft fluid tank having a bottom wall including an external surface and an inclined internal surface, comprising the steps of:

  • providing an ultrasound guide surface on said inclined internal surface;

    moving an ultrasonic transducer to a measurement position at said external surface;

    transmitting ultrasound from said ultrasonic transducer into said tank upwardly and substantially vertically through the fluid via said ultrasound guide surface;

    receiving an ultrasonic echo at said ultrasonic transducer;

    deducing the fluid level based on the arrival time of said ultrasonic echo; and

    ,removing said ultrasonic transducer from said measurement position.

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