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Ultrasonic flowmeter including an oscillation start unit for acceleration stability of the oscillator

  • US 7,987,731 B2
  • Filed: 04/26/2007
  • Issued: 08/02/2011
  • Est. Priority Date: 12/27/2006
  • Status: Expired due to Fees
First Claim
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1. An ultrasonic flowmeter comprising:

  • an ultrasonic sensor that sends and receives ultrasonic waves in a flow path;

    an oscillator that generates an oscillation of a predetermined frequency; and

    an oscillation start unit comprising an oscillation unit which outputs pulses applied to the oscillator for a certain period to thereby accelerate stability of the oscillator, wherein pulses of the oscillator oscillated by the oscillation start unit are used to measure a propagation time of the ultrasonic waves.

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