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Phase controlled variable angle ultrasonic flow meter

  • US 9,752,907 B2
  • Filed: 11/06/2015
  • Issued: 09/05/2017
  • Est. Priority Date: 04/14/2015
  • Status: Active Grant
First Claim
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1. An ultrasonic flowmeter comprising:

  • a conduit for receiving a flow of a fluid;

    a flexible printed circuit board (FPC) comprising;

    a first ultrasonic transducer comprising a plurality of first segment electrodes located on a first side of a single first piezoelectric element;

    a second ultrasonic transducer comprising a plurality of second segment electrodes located on a first side of a single second piezoelectric element;

    a control circuit configured to sequentially activate the first segment electrodes using a pulse train to transmit a plurality of sonic signals to the second ultrasonic transducer,wherein a delay time between activation of each successive first segment electrode controls a phase velocity and an angle of emission of the corresponding sonic signal,wherein the FPC is bonded around the conduit.

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