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    • 4. 发明授权
    • Fetal heart rate counting system using digital signal processing
    • 胎心率计数系统采用数字信号处理
    • US4890624A
    • 1990-01-02
    • US171762
    • 1988-03-22
    • Dipankar GangulyGary B. Sanders
    • Dipankar GangulyGary B. Sanders
    • A61B8/02
    • A61B8/02A61B8/0866
    • A fetal heart rate counting system which includes a transducer element for transmitting an ultrasound signal into the fetal heart while the fetus is in utero and for receiving a returning Doppler signal frequency shifted by action of the fetal heart. The returning Doppler signal is processed to produce a forward heart movement Doppler signal, a reverse heart movement Doppler signal and the complete Doppler signal, from each of which fetal heart rate data is obtained. A composite fetal heart rate data is then produced from the three processed Doppler signal which is more accurate and complete than the data from any one signal individually.
    • 一种胎心率计数系统,其包括用于在胎儿处于子宫内时将超声信号传输到胎儿心脏中的换能器元件,并且用于接收通过胎儿心脏的动作而移位的返回多普勒信号频率。 处理返回的多普勒信号以产生从其中获得胎心率数据的每一个的前向心脏运动多普勒信号,反向心脏运动多普勒信号和完整的多普勒信号。 然后从三个处理的多普勒信号产生复合胎儿心率数据,其比来自任何一个信号的数据更准确和完整。
    • 7. 发明授权
    • Probe and system for detecting probe dislodgement
    • 用于检测探针移位的探头和系统
    • US4295475A
    • 1981-10-20
    • US088474
    • 1979-10-26
    • Terence A. Torzala
    • Terence A. Torzala
    • A61B5/01A61B5/00A61B5/024A61B5/0424A61G11/00
    • A61B5/01A61B5/02416A61B5/0424A61B5/14552A61B5/6843A61G11/00A61G2203/46Y10S200/36
    • A contact probe arranged to detect dislodgement of the probe from a body to which it has been attached. Probe dislodgement is detected by sensing an increased radiation level falling on a main sensor (14) located in the contact surface (10a) of the probe. The main sensor cooperates with a reference sensor (16) located in another surface (10b) of the probe which receives radiation reflected from the skin of the body to which the probe is attached. The reference sensor (16) provides a floating reference for the main sensor (14). In addition to providing an indication of probe dislodgement, the two sensors cooperate to develop an indication when they are shielded from the radiation source, thereby rendering the probe inoperative to sense probe dislodgement.
    • 一个接触探针,用于检测探头从其所连接的身体上的移位。 通过感测落在位于探头的接触表面(10a)中的主传感器(14)上的增加的辐射水平来检测探测器移动。 主传感器与位于探头的另一表面(10b)中的参考传感器(16)配合,所述参考传感器接收从探头所附接的身体的皮肤反射的辐射。 参考传感器(16)为主传感器(14)提供浮动参考。 除了提供探针移位的指示之外,当两个传感器屏蔽辐射源时,这两个传感器协调发展指示,从而使探针不起作用以感测探测器移位。