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    METHOD OF EXTRACTING ZERO CROSSING DATA FROM FULL SPECTRUM SIGNALS
    5.
    发明申请
    METHOD OF EXTRACTING ZERO CROSSING DATA FROM FULL SPECTRUM SIGNALS 有权
    从全谱信号中提取零交叉数据的方法

    公开(公告)号：US20140028283A1

    公开(公告)日：2014-01-30

    申请号：US13558945

    申请日：2012-07-26

    申请人： Ian Agranat

    发明人： Ian Agranat

    IPC分类号： G01R23/16

    CPC分类号： G01S15/34 ,  G01H3/00 ,  G01H3/08

    摘要： Methods and apparatus for using Fourier techniques to detect and isolate the fundamental frequency sweep of echolocation calls produced by bats, or of other narrow-band whistles as produced by other kinds of animals such as birds and whales. According to one example, a Fourier transform is applied on blocks of input samples to produce output frames, and a narrowband frequency modulated signal is detected and traced through the output frames. A filter is applied in each frame to attenuate frequencies above or below the narrowband signal, and an inverse Fourier transform is applied to produce an output signal. The resulting signal may then be analyzed with zero crossing techniques to measure the precise instantaneous frequency sweep.

    摘要翻译： 使用傅里叶技术检测和分离由蝙蝠或其他种类的动物如鸟类和鲸鱼产生的其他窄带口哨产生的回声定位呼叫的基频扫描的方法和装置。 根据一个示例，对输入样本块施加傅立叶变换以产生输出帧，并且通过输出帧检测并跟踪窄带调频信号。 在每个帧中应用滤波器以衰减窄带信号上方或下方的频率，并且应用傅立叶逆变换以产生输出信号。 然后可以用零交叉技术分析所得信号以测量精确的瞬时频率扫描。

    Ultrasound diagnostic apparatus
    6.
    发明授权
    Ultrasound diagnostic apparatus 失效
    超声诊断仪

    公开(公告)号：US08100832B2

    公开(公告)日：2012-01-24

    申请号：US12107461

    申请日：2008-04-22

    申请人： Masanori Kunita

    发明人： Masanori Kunita

    IPC分类号： A61B8/14 ,  A61B8/00

    CPC分类号： A61B8/06 ,  G01S7/5203 ,  G01S7/52066 ,  G01S15/34 ,  G01S15/8954

    摘要： A transmission wave corresponding to an FM continuous wave having been subjected to an FM modulation processing is transmitted from a transmitting transducer. A pre-amplifier generates a reception RF signal and outputs the reception RF signal to a receiving mixer. The receiving mixer applies orthogonal detection to the reception RF signal to generate a complex signal. A reference signal supplied to each mixer in the receiving mixer is generated based on an FM continuous wave output from an FM modulator. The FM continuous wave output from the FM modulator is delayed by a delay circuit, and one signal is directly supplied to a mixer whereas the other signal is supplied to a mixer via a π/2 shift circuit. The delay circuit applies a delay processing in accordance with a depth of a target position within a living organism to the FM continuous wave.

    摘要翻译： 从发送变换器发送对应于已经进行FM调制处理的FM连续波的发送波。 前置放大器产生接收RF信号，并将接收RF信号输出到接收混频器。 接收混频器对接收RF信号进行正交检测以产生复信号。 基于从FM调制器输出的FM连续波产生提供给接收混频器中每个混频器的参考信号。 来自FM调制器的FM连续波输出由延迟电路延迟，并且一个信号被直接提供给混频器，而另一个信号通过＆amp; p / 2移位电路提供给混频器。 延迟电路根据FM生物体内的目标位置的深度对FM连续波进行延迟处理。

    Personal object detector with enhanced stereo imaging capability
    7.
    发明授权
    Personal object detector with enhanced stereo imaging capability 失效
    具有增强的立体成像能力的个人物体探测器

    公开(公告)号：US6011754A

    公开(公告)日：2000-01-04

    申请号：US33211

    申请日：1998-03-02

    申请人： David Burgess ,  Lee Felsenstein ,  Steven E. Saunders

    发明人： David Burgess ,  Lee Felsenstein ,  Steven E. Saunders

    IPC分类号： A61H3/06 ,  G01S7/521 ,  G01S7/534 ,  G01S15/32 ,  G01S15/34 ,  G01S15/87 ,  G01S15/88 ,  G01S15/93

    CPC分类号： G01S15/34 ,  A61H3/061 ,  G01S15/88 ,  G01S7/521 ,  G01S7/534 ,  G01S15/87 ,  G01S15/93 ,  H04R5/033 ,  Y10S367/91

    摘要： A personal object or obstacle detector apparatus with enhanced stereo imaging capability includes a sonar system having dual receivers with field lobes positioned based on psychoacoustic considerations such as interaural intensity difference (IID) and interaural time difference (ITD). Receiver field pattern shapes and directions are selected to match the natural IID and ITD associated with human hearing. In one embodiment, dual receivers are used with a common transmitter while another embodiment utilizes two transmitter/receiver pairs with the transmitter and receiver collocated.

    摘要翻译： 具有增强的立体成像能力的个人物体或障碍物检测器装置包括具有双接收器的声纳系统，所述双接收器具有基于诸如颅内强度差异（IID）和心律时间差（ITD）的心理声学考虑而定位的视野瓣。 接收器场图案形状和方向被选择以匹配与人类听觉相关联的自然IID和ITD。 在一个实施例中，双接收机与公共发射机一起使用，而另一个实施例利用与发射机和接收机并置的两个发射机/接收机对。

    Sonar system
    8.
    发明授权
    Sonar system 失效
    声纳系统

    公开(公告)号：US4939699A

    公开(公告)日：1990-07-03

    申请号：US600701

    申请日：1966-12-08

    申请人： Francis J. Murphree ,  Henry L. Warner ,  Edward G. McLeroy

    发明人： Francis J. Murphree ,  Henry L. Warner ,  Edward G. McLeroy

    IPC分类号： G01S15/04 ,  G01S15/34

    CPC分类号： G01S15/34 ,  G01S15/04

    摘要： A sonar system having a sonar transmitter which is programmed to broadcastwo sets of several increasing frequency signals, with the frequency gap between each set thereof sufficient to cause them to distinguish between deep and shallow water targets, respectively. A heterodyne receiver receives target echoes of said sets of several frequency signals and converts them to two sets of identical frequency signals which are then readout as a single continuous target display signal.

    摘要翻译： 具有声纳发射机的声纳系统被编程为广播两组几个增加的频率信号，其中每组之间的频率间隙足以使它们分别区分深浅水域目标。 外差接收器接收所述几组频率信号的目标回波，并将它们转换成两组相同的频率信号，然后将其作为单个连续目标显示信号读出。

    Doppler pseudorandom noise velocimeters
    9.
    发明授权
    Doppler pseudorandom noise velocimeters 失效
    多普勒伪随机噪声速度计

    公开(公告)号：US4320765A

    公开(公告)日：1982-03-23

    申请号：US112528

    申请日：1980-01-16

    申请人： Dominique Cathignol ,  Claude Fourcade ,  Jean-Yves Chapelon

    发明人： Dominique Cathignol ,  Claude Fourcade ,  Jean-Yves Chapelon

    IPC分类号： A61B8/06 ,  G01F1/66 ,  G01P5/24 ,  G01S15/34 ,  G01S15/58 ,  A61B10/00

    CPC分类号： G01P5/244 ,  A61B8/06 ,  G01F1/663 ,  G01S15/34 ,  G01S15/586

    摘要： This invention is directed to improved pseudorandom noise velocimeters and methods therefor, using the Doppler effect, to enable the external measurement of the speed of a moving target within a fixed conveying medium. In accordance with a preferred embodiment of the present invention a continuous pseudorandom ultrasonic noise signal formed by a repetitive code C having n different elementary segments S is radiated. Correlation between a received echo and the delayed radiated signal is accomplished by proceeding successively for each elementary segment, using a different measuring band, for a period corresponding to the period of each segment. The correlation values thus obtained are then stored and thereafter a Doppler low frequency curve is reconstituted by regrouping the correlation values corresponding to the different elementary segments of the repetitive code.

    摘要翻译： 本发明涉及使用多普勒效应的改进的伪随机噪声速度计及其方法，以便能够外部测量固定传送介质内的移动目标的速度。 根据本发明的优选实施例，辐射由具有n个不同基本段S的重复码C形成的连续伪随机超声波噪声信号。 接收到的回波和延迟的辐射信号之间的相关性是通过使用不同的测量带在每个段的周期相应的时段内针对每个基本段连续进行的。 然后存储如此获得的相关值，然后通过重新分组对应于重复码的不同基本段的相关值来重构多普勒低频曲线。

    Sensory aids for the blind
    10.
    发明授权
    Sensory aids for the blind 失效
    感觉辅助盲人

    公开(公告)号：US3987403A

    公开(公告)日：1976-10-19

    申请号：US541146

    申请日：1975-01-15

    申请人： Russell Peter Smith

    发明人： Russell Peter Smith

    IPC分类号： A61H3/06 ,  G01S15/34 ,  G01S15/87 ,  G01S15/88 ,  G02C11/00 ,  G01S9/68 ,  G01S7/54

    CPC分类号： G01S15/34 ,  G01S15/87 ,  G01S15/88 ,  Y10S367/90 ,  Y10S367/91

    摘要： A sensory aid for the blind in which a frequency swept ultra-sonic carrier signal is generated and radiated as acoustic energy from a head set and reflected acoustic energy is received by two spaced apart receiving transducers which feed a two channel receiver. The receiving transducers have divergent polar lobes which in combination with the polar lobe of the transmitting transducer simulate the characteristics of a normal human auditory system. The carrier signal is multiplied with each received signal to produce respective beat frequency signals each of which have a frequency and level which is dependant on the range and direction respectively of the source of reflection with respect to the user. The gain of both channels is controlled synchronously by controlling the level of the carrier signal multiplied with each received signal. The range of gain control can be increased by feeding the transmitting transducer with the controlled level carrier signal.

    摘要翻译： 其中产生频率扫描的超声波载波信号并作为来自头组和反射声能的声能辐射的盲人的感觉辅助装置由两个间隔开的接收换能器接收，该接收换能器馈送双通道接收器。 接收传感器具有发散的极瓣，其与发射换能器的极瓣相结合，模拟正常人类听觉系统的特征。 载波信号与每个接收信号相乘以产生各自的频率信号，每个频率信号具有取决于相对于用户的反射源的范围和方向的频率和电平。 通过控制与每个接收信号相乘的载波信号的电平，同步地控制两个信道的增益。 增益控制的范围可以通过向发射传感器馈送受控电平载波信号来增加。