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1.发明公开Method and device for precisely determining the time delay between two electric pulses 失效用于精确确定两个电脉冲之间的时间延迟的方法和装置
公开(公告)号：EP0185133A3
公开(公告)日：1988-05-04
申请号：EP85109562
申请日：1985-07-30
发明人： Geweke, Werner
IPC分类号： G01S07/52 , G01S15/10 , H03K05/153
CPC分类号： G01S15/101 , G01S7/526
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2.发明公开
公开(公告)号：EP0226466A3
公开(公告)日：1987-10-14
申请号：EP86309693
申请日：1986-12-12
CPC分类号： G01S7/52036 , A61B5/01 , A61B8/5223 , G01H5/00 , G01S7/52026
摘要： Disclosed is an ultrasonic diagnostic apparatus for detecting variations of an acoustic characteristic to obtain the fluctuation of temperature within a body to be examined. The ultrasonic diagnostic apparatus includes an ultrasonic transducer (l0; 80, 8l; 90, 92) for transmitting an ultrasonic wave and receiving the reflected ultrasonic wave which is in then converted into an electric signal. The signal is phase-detected (l4, l5) in accordance with a plurality of gate intervals or a plurality of window intervals to detect a phase difference therebetween. The relative variation of velocity distribution shown before and after heating of the body is obtained on the basis of the phase variation resulting from the variation of the ultrasonic drive frequency.
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公开(公告)号：EP0147208A3
公开(公告)日：1986-11-05
申请号：EP84309007
申请日：1984-12-21
摘要： A counter 47 is provided to count an expected 32 pulses in a pulse train comprising a signal received atA and passing through an AND gate 60 when enabled. However if the pulses in the leading and trailing edges are of low amplitude they may be below a threshold level and thus be missed so that the counter 47 will not reach the required count of 32. However when the sequence of pulses terminates a counter 62 is then able to reach a full count of three upon receipt of pulses from an oscillator 64 transmitted at twice the frequency of the pulses in the signal. This releases a latch 58 so that the oscillator pulses can pass through the AND gate 65 to the counter 47 so that the count is completed. Since the losses of pulses at the beginning and end of the signal are expected to be symmetrical addition of pulses at twice the frequency in the counter 47 to those already received from a signal will compensate for the pulses lost at the beginning and end of the signal and will ensure that the output from the counter 47 occurs approximately at the same instant when the end of the trailing edge of the signal is reached. Hence the output from the counter 47 is a true reflection of the timing of receipt of the signal.
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公开(公告)号：EP0249952A3
公开(公告)日：1988-12-07
申请号：EP87108674
申请日：1987-06-16
摘要： A detecting apparatus using ultrasonic waves comprises a sensor unit (4) and a signal processing unit (1) for processing a reception signal (B1) sent from the sensor unit (4) to output a detection signal. These units (1, 4) are connected by a cable (9) having three core wires (9a, 9b, 9c). A power supply signal (A2), an ultrasonic transmission signal (A1) and operation indication signal (A3) are multiplexed to the first core wire (9a) and transmitted from the signal processing unit (1) to the sensor unit (4). An ultrasonic reception signal (B1) and a temperature detection signal (B2) are multiplexed to the second core wire (9b) and transmitted from the sensor unit (4) to the signal processing unit (1). The third core wire (9c) is used to connect the grounding levels of both units (1, 4).
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公开(公告)号：EP0262437A3
公开(公告)日：1988-10-05
申请号：EP87112822
申请日：1987-09-02
CPC分类号： G01S7/52004 , G01S15/88 , Y10S367/902
摘要： Ein Ultraschall-Echoprofilsensor zur Verwendung als taktiler Sensor, mit einem einen Sender (S) und einen Empfänger (E) enthaltenden Ultraschall-Meßkopf (M), der einen mitgeführten Referenzreflektor (R) aufweist, mittels dessen die momentane Schallgeschwindigkeit der Umgebungsluft bestimmbar ist, wodurch die jeweilige Entfernung des taktilen Sensors von einem Sensorobjekt (O) unabhängig von der variablen Schall geschwindigkeit der Umgebungsluft richtig zu messen ist, weil ein durch den Referenzreflektor (R) verursachtes Refe renzecho durch seine bekannte ungefähre Position von Situa tionsechos unterscheidbar ist. Der Referenzreflektor (R), dessen Abstand zu dem Ultraschall-Empfänger (E) im Regelfall konstant ist, ist derart angeordnet ist, daß sich der Ab stand zwischen dem Ultraschall-Empfänger (E) und dem Refe renzreflektor (R) bei taktilem Kontakt zwischen einem Sen sorkopf (K) und dem Sensorobjekt (O), insbesondere einem Werkstück, auf charakteristische Weise ändert.
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6.发明公开Pulse centroid echo method and apparatus for enhanced sound velocity estimation in vivo 失效脉搏中心ECHO方法和装置，用于增强VIVO中的声速估计
公开(公告)号：EP0221409A3
公开(公告)日：1987-08-12
申请号：EP86114290
申请日：1986-10-15
发明人： Ophir, Jonathan
CPC分类号： A61B8/00 , G01H5/00 , G01S7/52025 , G01S15/8913
摘要： A method and apparatus of enhancing the accuracy of in vivo sound velocity estimation by identifying segments of different sound velocity along a tracked ultrasound beam. The effects of refraction on the tracked beam at the interface between tissue regions are estimated. Also disclosed is a technique for estimating the refractive effects of naturally occurring and artificially introduced acoustical contrast fluids. The accuracy of the sound velocity measurements is increased by utilizing the centroid-to-centroid distance between the pulses produced by ultrasound sending and receiving transducers in calculating the ultrasound beam velocity.
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公开(公告)号：EP0136697A3
公开(公告)日：1987-03-25
申请号：EP84111770
申请日：1984-10-02
IPC分类号： G01S07/52
CPC分类号： G01S7/52004 , G01S2007/52009 , G01S2007/52012
摘要： An ultrasonic vehicle rangefinder having a detecting system for discriminating whether trouble is in transmission or reception side is shown. The discrimination is established by detection of an attenuation vibration at a transmission microphone.
摘要翻译： 示出了具有用于鉴别故障在发送侧或接收侧的检测系统的超声波车辆测距仪。 通过检测传输麦克风的衰减振动来确定辨别。
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公开(公告)号：EP0127856A3
公开(公告)日：1986-05-14
申请号：EP84105989
申请日：1984-05-25
CPC分类号： G01S7/52063 , A61B8/00 , G01N29/06 , G01S7/52044 , G01S7/52046
摘要： In an ultrasonic examination apparatus (100) of the sector scanning type, a false contour appears in a tomographic image of an object (20) due to a variation of the pixelizing, or digitizing precision over the entire scanning region, especially nearthe central ultrasonic scanning lines. A wobbling processor (64) is provided in an address generator for write operation (6). When the echo signals, orthe image signals obtained by the scanning of the central untrasonic scanning lines are written into pixels of a frame memory, the write-in addresses are processed by the wobbling processor (64) so that the pixelizing precision can be uniformed over the entire scanning region.
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公开(公告)号：EP0104929A3
公开(公告)日：1985-08-28
申请号：EP83305746
申请日：1983-09-26
发明人： Dietz, Dennis R.
CPC分类号： G01S15/8922 , G01S15/895 , G10K11/32 , G10K11/345
摘要： An annular array ultrasonic transducer is provided which comprises a plurality of concentric rings of piezoelectric material having widths chosen for operation at different depths of focus. The total aperture of the transducer is divided into a plurality of contiguous focal depths. In the near field only the inner element or elements are activated, and rings of increasing radius are added as the depth of focus is increased. The widths of the rings are chosen to keep phase errors across each ring within acceptable limits over the depth of field for which they are energized. The transition depths at which the aperture is changed are chosen to allow rings of manufacturable widths to be employed while maintaining aperture transitions which prevent banding in the ultrasonic image.
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10.发明公开Correlator circuit and device for ultrasound flow mapping comprising such a circuit 失效用于包含这种电路的超声波流量映射的调节器电路和装置
公开(公告)号：EP0242914A3
公开(公告)日：1988-09-14
申请号：EP87200687
申请日：1987-04-13
IPC分类号： G06F15/336 , G01S07/52 , A61B08/06
CPC分类号： G06F17/15 , A61B8/06 , G01S7/52026 , G01S15/8979
摘要： A circuit for determining the cross-correlation function between two digitally sampled signals comprises a plurality of fractional step delay (FSD) digital interpolation filters (86, 87, 88) which estimate the value of one of said input signals at intervals between said samples and a plurality of correlation circuits (89-97) each of which determined the correlation between the first signal and the output of one of said interpolation filters. A device for ultrasound flow mapping comprising such a circuit has an improved accuracy.
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