Ultrasonic flow meter with digitally under-sampled flow measurements

Ultrasonic flow meter with digitally under-sampled flow measurements

  • CN 104,169,692 A
  • Filed: 11/30/2012
  • Published: 11/26/2014
  • Est. Priority Date: 12/02/2011
  • Status: Active Application
First Claim
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1. operate the method for ultrasonic flow meter with the flow velocity of measurement fluid, described ultrasonic flow meter comprises:

  • -at least two ultrasonic transducers, described at least two ultrasonic transducers be arranged to across measuring distance relative direction on transmit and receive ultrasonic signal.-generator circuit, described generator circuit is for the in check generation of the sound waves bag by described at least two ultrasonic transducers transmitting;

    -acceptor circuit, described acceptor circuit is for receiving from the signal of described at least two ultrasonic transducers transmitting;

    -for the processing module of digital signal processing;

    Wherein, described method comprises;

    At least two signal path for along cardinal principle relative direction;

    -generating the described sound waves bag that will output to described measuring distance at first ultrasonic transducer place of described at least two ultrasonic transducers, described ripple bag generates with signal frequency;

    -receive described sound waves bag at second ultrasonic transducer place of described at least two ultrasonic transducers as the signal receiving;

    -with the sample frequency lower than nyquist limit, the signal being received is carried out to digitizing, receive undersampled signal to generate for the digitizing of given signal path;

    -receive undersampled signal according at least two digitizings along cardinal principle relative direction, determine along the difference in the travel-time of described measuring distance.

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