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Ultrasonic flowmeter, wedge for ultrasonic flowmeter, method for setting ultrasonic transmitting/receiving unit, and ultrasonic transmitting/receiving unit

  • US 20070151362A1
  • Filed: 12/24/2004
  • Published: 07/05/2007
  • Est. Priority Date: 12/26/2003
  • Status: Abandoned Application
First Claim
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1. An ultrasonic flowmeter for measuring a flow rate of a fluid to be measured, comprising:

  • an ultrasonic transmitter for launching ultrasonic pulses of a prescribed frequency into the fluid to be measured in fluid pipe from an ultrasonic transducer along a measurement line;

    a flow velocity distribution measurement means for measuring flow velocity distribution of the fluid to be measured in a measurement region by receiving ultrasonic echoes reflected from the measurement region among the ultrasonic pulses incident into the fluid to be measured; and

    a flow rate operation means for calculating a flow rate of the fluid to be measured in the measurement region based on the flow velocity distribution of the fluid to be measured, wherein the ultrasonic transmitter and a receiver for receiving ultrasonic echoes are made to be an ultrasonic transducer integrating a transmitting function and a receiving function of the ultrasonic wave;

    wherein a wedge for fixing said ultrasonic transmitter to the outer surface of the fluid pipe for the fluid to be measured is provided; and

    wherein the distance from said ultrasonic transmitter to the outer surface of the fluid pipe and the distance from the outer surface of the fluid pipe to the inner surface of the fluid pipe through which the ultrasonic wave passes are formed to be an integral multiple of a half-wave length of ultrasonic wave incident into the fluid to be measured.

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