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1. 发明授权

US4751847A Ultrasonic velocity meter 失效
标题翻译：超声波速度计
公开(公告)号：US4751847A
公开(公告)日：1988-06-21
申请号：US5900
申请日：1987-01-22
申请人： Kageyoshi Katakura , Toshio Ogawa , Ishikawa Shizuo , Hisashi Nishiyama , Mashio Kodama
发明人： Kageyoshi Katakura , Toshio Ogawa , Ishikawa Shizuo , Hisashi Nishiyama , Mashio Kodama
IPC分类号： G01S15/50 , A61B8/06 , G01S15/58 , G01N29/00
CPC分类号： G01S7/52085 , G01S15/582
摘要： A phase difference comparison type of ultrasonic velocity meter repeatingly transmitting acoustic waves in the form of pulses at alternate time intervals: T-T.sub.S and T+T.sub.S, receiving reflected waves generated by the transmission of these waves and reflected on an object, forming first and second mixed waves by mixing the reception signal obtained from the reflected waves with two reference waves having phases shifted 90 degrees from each other, detecting the phase difference between the present vectors representing the first and second mixed waves and similar vectors which have been obtained with respect to the preceding pulse transmission, detecting the phase difference Q between the phase difference caused in relation to the time interval T-T.sub.S and the phase difference caused in relation to the time interval T+T.sub.S with respect to a phase difference obtained each time a pulse is transmitted, and calculating the Droppler shift angle frequency .omega.d from .omega.d=Q/2T.sub.S.
摘要翻译：超声波速度计的相位差比较类型以交替的时间间隔重复地以脉冲形式发射声波：T-TS和T + TS，接收由这些波的传播产生并反射在物体上的反射波，形成第一和通过将从反射波获得的接收信号与具有相位偏移90度的相位的两个参考波混合来检测表示第一和第二混合波的当前矢量之间的相位差以及相对于已经获得的相似矢量的第二混合波检测相对于时间间隔T-TS引起的相位差与相对于时间间隔T + TS的相位差相对于每次获得的相位差产生的相位差的相位差Q 并且从ωd = Q / 2TS计算滴管移位角频率ωd。

2. 发明授权

US4744367A Apparatus for measuring blood flow speed using an ultrasonic beam 失效
标题翻译：使用超声波束测量血流速度的装置
公开(公告)号：US4744367A
公开(公告)日：1988-05-17
申请号：US812843
申请日：1985-12-23
申请人： Mashio Kodama , Toshio Kondo
发明人： Mashio Kodama , Toshio Kondo
IPC分类号： A61B8/06 , A61B8/00 , G01S7/52 , G01S15/58 , G01S15/89 , G01N29/02
CPC分类号： G01S15/582 , G01S15/8977 , G01S7/5206
摘要： An ultrasonic diagnosis apparatus comprises a probe for transmitting an ultrasonic beam toward a body having a blood vessel therein and a plurality of receiver circuits corresponding to sampling points of the body in a direction approximately perpendicular to the beam to produce respective intensities of reflected waves from the sampling points. A distribution of the reflected-wave intensities from the receiver circuits is measured at a predetermined interval of time. A shift between two successive intensity distributions thus measured is detected by a correlator, thereby determining a blood flow speed, in the blood vessel of the body, in the direction approximately perpendicular to the beam.
摘要翻译：超声波诊断装置包括用于向其中具有血管的身体发送超声波束的探针和与大体垂直于束的方向对应于身体的采样点的多个接收器电路，以产生来自采样点。在预定的时间间隔测量来自接收器电路的反射波强度的分布。通过相关器检测由此测量的两个连续强度分布之间的偏移，从而在大致垂直于束的方向上确定身体的血管中的血流速度。

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