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Doppler velocity detection device and ultrasonographic device using the same

  • US 7,942,821 B2
  • Filed: 07/09/2004
  • Issued: 05/17/2011
  • Est. Priority Date: 11/27/2003
  • Status: Expired due to Fees
First Claim
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1. A Doppler velocity detection device comprising:

  • a transmit/receive unit for transmitting/receiving pulse waves to/from an object whose velocity is to be measured a plurality of times, anda signal detector/analyzer unit for analyzing the velocity of the object whose velocity is to be measured, based on the received signals,wherein said signal detector/analyzer unit is configured to extract reception echo signals of equal lapse time from transmission times of pulses, from a plurality of reception echo signals obtained by transmission/reception of a plurality of times, and expand the reception echo-time series signals arranged in order of the transmission times as components of a Legendre polynomial, and obtain a velocity signal of the object whose velocity is to be measured based on the magnitudes of expansion coefficients.

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