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System and method using digital filters and neural networks to determine fluid flow

  • US 6,381,549 B1
  • Filed: 01/28/1999
  • Issued: 04/30/2002
  • Est. Priority Date: 01/28/1999
  • Status: Expired due to Fees
First Claim
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1. An ultrasonic system for a fluid contained within a pipe, the ultrasonic system comprising:

  • an upstream transducer mountable on the pipe, the upstream transducer configured to receive first ultrasonic pulses and to transmit second ultrasonic pulses;

    a downstream transducer mountable on the pipe at a location displaced from the upstream transducer at least along the longitudinal axis of the pipe, the downstream transducer configured to receive the second ultrasonic pulses and to transmit the first ultrasonic pulses; and

    a processor having a timer and a counter, the processor configured to use the timer and counter to determine a time period, TU, associated with the first ultrasonic pulses, the processor configured to use the timer and counter to determine a time period, TD, associated with the second ultrasonic pulses, the processor configured to determine at least one characteristic of the fluid or the pipe based on a filter system configured in accordance with one or more equations having one or more irreducible terms involving TU and one or more irreducible terms involving TD, the one or more equations having one or more TU filter coefficients associated with the one or more irreducible terms involving TU and the one or more equations having one or more TD filter coefficients associated with the one or more irreducible terms involving TD, at least one of the one or more TU filter coefficients being unequal in absolute value to at least one of the one or more TD filter coefficients.

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