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27 条记录 (耗时 0.012 秒)

    Determining a Level and Flow Speed of a Medium
    2.
    发明申请
    Determining a Level and Flow Speed of a Medium 有权
    确定介质的液位和流速

    公开(公告)号：US20150007653A1

    公开(公告)日：2015-01-08

    申请号：US14323737

    申请日：2014-07-03

    申请人： VEGA Grieshaber KG

    发明人： Josef FEHRENBACH ,  Juergen Motzer ,  Daniel Schultheiss

    IPC分类号： G01F23/28 ,  G01F1/66

    CPC分类号： G01S13/584 ,  G01F1/002 ,  G01F1/007 ,  G01F1/663 ,  G01F1/667 ,  G01F23/28 ,  G01F23/284 ,  G01P5/242 ,  G01S13/583 ,  G01S13/87 ,  G01S13/88

    摘要： A measurement device is provided for determining a distance of the measurement device from a medium and a flow speed of a medium by evaluating a transmission signal emitted by the fill level measurement device and reflected by the medium. The measurement device includes an antenna arrangement for emitting the transmission signal in two different directions. The flow speed of the medium can be determined using the Doppler shift of the transmission signal.

    摘要翻译： 提供了一种测量装置，用于通过评估由所述填充液位测量装置发射并由介质反射的传输信号来确定测量装置与介质的距离和介质的流速。 测量装置包括用于沿两个不同方向发射发射信号的天线装置。 可以使用发送信号的多普勒频移来确定介质的流速。

    Device for determining the velocity in a flowing fluid by use of the acoustic Doppler-effect
    3.
    发明授权
    Device for determining the velocity in a flowing fluid by use of the acoustic Doppler-effect 失效
    用于通过使用声学多普勒效应来确定流动流体中的速度的装置

    公开(公告)号：US4713971A

    公开(公告)日：1987-12-22

    申请号：US865727

    申请日：1986-05-27

    申请人： Wilhelmus Johannes

    发明人： Wilhelmus Johannes

    IPC分类号： G01P5/00 ,  A61B8/06 ,  G01F1/66 ,  G01P5/24

    CPC分类号： G01P5/242

    摘要： The measured intensities of separate ultrasonic frequency components furnished by respective bandpass filters of the spectrum analyzer portion of an audio frequency Doppler-effect flow meter are converted into digital values and the related values of noise intensity are calculated by applying weighting factor to these digital intensity values. The noise intensity values are subtracted from the observed intensity values to provide corrected signal intensity values these corrected values are then compared by a digital processor to determine, from the frequency of maximum corrective intensity value, the mean rate of flow which the ultrasonic transducer and receiver has observed. The output of the bandpass filters of lowest and highest frequency range are respectively multiplied by a first weighting factor of between 0.65 and 0.85 and by a second weighting factor of between 0.35 and 0.45 and weighting factors for other frequency components are then calculated by a function generator by reference to a monotonic curve having extreme values equal to the first and second weighting factors.

    摘要翻译： PCT No.PCT / NL85 / 00035 Sec。 371日期：1986年5月27日 102（e）日期1986年5月27日PCT提交1985年8月23日PCT公布。 公开号WO86 / 01605 日期：1986年3月13日。由音频多普勒效应流量计的频谱分析仪部分的各个带通滤波器提供的分离的超声频率分量的测量强度被转换成数字值，噪声强度的相关值通过应用 这些数字强度值的权重因子。 从观察到的强度值中减去噪声强度值以提供校正的信号强度值，然后通过数字处理器比较这些校正值，以从最大校正强度值的频率确定超声换能器和接收器的平均流量 已经观察到。 最低和最高频率范围的带通滤波器的输出分别乘以0.65至0.85之间的第一加权因子和0.35至0.45之间的第二加权因子，然后由函数发生器计算其他频率分量的加权因子 通过参考具有等于第一和第二加权因子的极值的单调曲线。

    Method for remotely determining sea surface roughness and wind speed at a water surface
    5.
    发明授权
    Method for remotely determining sea surface roughness and wind speed at a water surface 失效
    在水面上远程测定海面粗糙度和风速的方法

    公开(公告)号：US5808741A

    公开(公告)日：1998-09-15

    申请号：US675430

    申请日：1996-06-26

    申请人： Kenneth D. Anderson

    发明人： Kenneth D. Anderson

    IPC分类号： G01C13/00 ,  G01P5/22 ,  G01P5/24 ,  G01S5/14 ,  G01S13/00 ,  G01S13/58 ,  G01S13/95 ,  G01S19/19 ,  G01B15/04

    CPC分类号： G01P5/242 ,  G01C13/002 ,  G01P5/22 ,  G01S13/58 ,  G01S13/95 ,  G01S13/003

    摘要： Transmitted signals are used to remotely assess sea surface roughness and nce wind speed at a water surface. A signal is transmitted from a signal source as it moves either through air or space. A land- or sea-based antenna receives the signal directly from the signal source and indirectly from the signal source by way of reflection of the signal from the surface being examined. The sum of the directly and indirectly received signals form an interference pattern as the signal source is moved. The interference pattern has peak-to-null signal values that are characteristic of the surface conditions being analyzed. Reference interference patterns are then generated for known surface conditions, each of the reference patterns exhibiting "known" characteristic peak-to-null signal values. The peak-to-null signal values of the reference interference patterns are then compared to the peak-to-null signal values generated from the surface being examined. The reference interference pattern having known peak-to-null signal values most closely resembling the peak-to-null signal values generated from the surface being examined is determined. The known surface conditions of this reference interference pattern are then equated with the unknown surface conditions of the surface being examined. By using this technique one can determine the surface conditions of a sea surface as well as the wind speed present at such a surface.

    摘要翻译： 传输信号用于远程评估海面粗糙度，从而在水面上评估风速。 当信号源通过空气或空间移动时，信号从信号源发送。 陆基或海基天线通过来自被检测表面的信号的反射，直接从信号源接收信号并且间接地从信号源接收信号。 当信号源被移动时，直接和间接接收的信号的和形成干扰模式。 干涉图形具有峰值到零信号值，这是正在分析的表面条件的特征。 然后针对已知表面条件生成参考干涉图案，每个参考图案呈现出“已知”特征峰值到零信号值。 然后将参考干涉图案的峰值到零点信号值与从被检测表面产生的峰值到零点信号值进行比较。 确定与从被检查表面产生的峰值到零信号值非常类似的具有已知峰值到零点信号值的参考干涉图案。 然后将该参考干涉图案的已知表面条件等同于被检测表面的未知表面条件。 通过使用这种技术，可以确定海面的表面状况以及在这种表面处存在的风速。

    Liquid flowmeter including doppler signal processing, and method
    6.
    发明授权
    Liquid flowmeter including doppler signal processing, and method 失效
    液体流量计包括多普勒信号处理和方法

    公开(公告)号：US5421211A

    公开(公告)日：1995-06-06

    申请号：US321023

    申请日：1994-10-06

    申请人： Donald B. Heckman

    发明人： Donald B. Heckman

    IPC分类号： G01F1/00 ,  G01F1/66 ,  G01P5/24

    CPC分类号： G01F1/667 ,  G01F1/002 ,  G01F1/662 ,  G01F1/663 ,  G01P5/242

    摘要： A liquid flowmeter and method for determining the velocity of flow of fluid in a conduit, including a sensor adapted for mounting in the bottom of the conduit, and including acoustic energy transmitting and receiving devices, an in-phase reflected Doppler energy signal detector connected with the receiving device, an anti-alias low pass filter for producing from the in-phase reflected energy a filtered signal, a digital-to-analog converter for digitalizing the in-phase signal to produce a sampled array, an accumulator for storing a first number (M) of mean zeroed power spectra from the sampled array, a zeroing device for zeroing a second number (K) of the initial samples of the power spectra, thereby to produce a first modified spectra, a median filter of rank R for filtering the first modified spectra to produce a second modified spectra, a limiting device for limiting the second modified spectra to produce samples limited to the upper portion of a range of amplitudes, thereby to produce a third modified spectra, a device for determining the high-frequency edge of the third modified spectra, a first converting device operable when the third modified spectra have a wide band width for producing as a multiple of the high-frequency edge an estimate of mean fluid velocity, and a second converting device operable when the third modified spectra have a narrow band width for producing as a function of the spectral peak an estimate of mean fluid velocity.

    摘要翻译： 一种用于确定管道中的流体流速的液体流量计和方法，包括适于安装在导管底部的传感器，并且包括声能发射和接收装置，一个同相反射的多普勒能量信号检测器，与 接收装置，用于从同相反射能量产生滤波信号的抗混叠低通滤波器，用于数字化同相信号以产生采样阵列的数模转换器，用于存储第一 来自采样阵列的平均归零功率谱的数量（M），用于归零功率谱的初始样本的第二数量（K）的归零装置，从而产生第一修改光谱，用于滤波的等级R的中值滤波器 第一修改光谱以产生第二修改光谱，用于限制第二修改光谱以产生限于幅度范围的上部的样本的限制装置，从而产生 第三修改光谱，用于确定第三修改光谱的高频边缘的设备，当第三修改光谱具有用于产生高频边缘的倍数的宽带宽时可操作的第一转换设备， 平均流体速度，以及第二转换装置，当第三修改的光谱具有窄带宽以便产生平均流体速度的估计值作为光谱峰值的函数时可操作。

    Single crystal Doppler flowmeter
    7.
    发明授权
    Single crystal Doppler flowmeter 失效
    单晶多普勒流量计

    公开(公告)号：US4579005A

    公开(公告)日：1986-04-01

    申请号：US672313

    申请日：1984-11-15

    申请人： Alvin E. Brown

    发明人： Alvin E. Brown

    IPC分类号： G01F1/66 ,  G01P5/24

    CPC分类号： G01F1/663 ,  G01P5/242

    摘要： A Doppler flowmeter which utilizes a single crystal immersed in the flow stream directing energy in a direction parallel with the flow direction. The crystal is fed by an oscillator at a single frequency corresponding to an ultrasonic vibrational mode for the crystal. The crystal also detects reflected acoustic wave energy with the input and output signals being electrically combined in the crystal. An electrical discriminator circuit is able to separate a multi-spectral Doppler signal from the crystal by phase cancellation of the transmitted signal. The recovered signal is fed to a tunable state variable filter which establishes a ninety degree phase shift with the incoming multi-spectral signal. This phase shifted signal is combined with the incoming multi-spectral signal in a phase lock loop with an output of the loop used to clock the state variable filter. Another output is a synthesized Doppler frequency representative of the mean Doppler frequency.

    摘要翻译： 一种多普勒流量计，其利用浸入流动流中的单晶在与流动方向平行的方向上引导能量。 晶体以对应于晶体的超声波振动模式的单个频率由振荡器馈送。 晶体还可以在晶体中电输入和输出信号中检测反射的声波能量。 鉴别器电路能够通过发射信号的相位消除将多光谱多普勒信号与晶体分离。 恢复的信号被馈送到可调状态变量滤波器，其建立与进入的多光谱信号的九十度相移。 该相移信号与进入的多光谱信号组合在一个锁相环中，该环路的输出用于对状态变量滤波器进行时钟。 另一输出是表示平均多普勒频率的合成多普勒频率。

    Two-transducer Doppler flowmeter with swept oscillator
    8.
    发明授权
    Two-transducer Doppler flowmeter with swept oscillator 失效
    双通道多普勒流量计与扫频振荡器

    公开(公告)号：US4333353A

    公开(公告)日：1982-06-08

    申请号：US173012

    申请日：1980-07-28

    申请人： Joseph Baumoel

    发明人： Joseph Baumoel

    IPC分类号： G01F1/66 ,  G01P5/24

    CPC分类号： G01F1/663 ,  G01P5/242

    摘要： A flowmeter clamped onto the outside of a conduit uses doppler techniques for measuring the flow velocity of a fluid within the conduit. Separated transmitter and receiver transducers are connected to different locations on the conduit. An oscillator connected to the transmit crystal causes the crystal to produce a continuous high frequency output wave which is injected through the pipe wall and into the fluid. The frequency of the transmit oscillator is cyclically swept through a given frequency range. The receiver transducer receives reflected sonic signals from particles moving with the fluid whose velocity is to be measured. The receiver crystal also receives, through the pipe wall, the transmitted wave form. The transmitted signal and received signal are added together to produce an amplitude-modulated envelope having a beat frequency related to the flow velocity of particles producing the reflected signal received by the receiving crystal. By using frequency sweep or dither, the effect of standing waves at the receiving crystal is eliminated since, during the sweep cycle, at least one transmitter signal amplitude will be present to produce an optimum beat frequency output when added to the reflected signal. The measured amplitude-modulated wave is applied to an amplitude demodulator which, in turn, is connected to a flow indicator. Means are provided to control the amplitude of the transmit signal which is added to the receive signal to prevent the receive signal from overwhelming the pipe conducted transmit signal in the summation process producing the beat frequency.

    摘要翻译： 夹在管道外侧的流量计使用多普勒技术来测量管道内流体的流速。 分离的发射器和接收器换能器连接到管道上的不同位置。 连接到发射晶体的振荡器使得晶体产生连续的高频输出波，其通过管壁注入流体。 发射振荡器的频率在给定的频率范围内循环扫描。 接收器传感器接收来自与要测量其速度的流体一起运动的颗粒的反射声波信号。 接收器晶体还通过管壁接收透射波形。 将发送的信号和接收信号相加在一起以产生具有与产生由接收晶体接收的反射信号的粒子的流速相关的拍频的振幅包络。 通过使用频率扫描或抖动，消除了接收晶体处的驻波的影响，因为在扫描周期期间，将存在至少一个发射机信号幅度，以在添加到反射信号时产生最佳拍频输出。 测量的幅度调制波被施加到幅度解调器，该幅度解调器又连接到流量指示器。 提供了用于控制附加到接收信号的发送信号的幅度的装置，以防止接收信号在产生拍频的求和过程中压倒管道传导信号。

    Ultrasonic continuous wave doppler blood flow-meter
    10.
    发明授权
    Ultrasonic continuous wave doppler blood flow-meter 失效
    超声波连续波多普勒血流量计

    公开(公告)号：US5807259A

    公开(公告)日：1998-09-15

    申请号：US804915

    申请日：1997-02-24

    申请人： Yasuhiro Nakamura ,  Hisashi Akiyama ,  Sueo Baba

    发明人： Yasuhiro Nakamura ,  Hisashi Akiyama ,  Sueo Baba

    IPC分类号： G01P5/00 ,  A61B8/06 ,  G01P5/24 ,  A61B8/00

    CPC分类号： G01P5/242

    摘要： An ultrasonic continuous wave doppler blood flow-meter deflects an ultrasonic continuous wave to an arbitrary angle and transmits it into an organism, thereby measuring a blood flow speed of the organism. Two continuous sine wave signals of different phases and a plurality of sets of pairs of coefficients are generated. One of each of the pairs of coefficients is multiplied to one of the two sine wave signals. The other one of each of the pairs of coefficients is multiplied to the other one of the two sine wave coefficients. After that, two sine wave signals after the multiplication are added, so that a plurality of synthesis sine wave signals are generated. When a plurality of micro vibrators are driven by the plurality of synthesis sine wave signals, the ultrasonic continuous wave is deflected to an arbitrary angle and is transmitted into the organism.

    摘要翻译： 超声波连续波多普勒血流计将超声波连续波偏转到任意角度并将其传输到生物体中，从而测量生物体的血流速度。 产生不同相位的两个连续正弦波信号和多组系数对。 每对系数中的一个被乘以两个正弦波信号中的一个。 每对系数中的另一个被乘以两个正弦波系数中的另一个。 之后，加上乘法后的两个正弦波信号，从而产生多个合成正弦波信号。 当多个微振动器由多个合成正弦波信号驱动时，超声波连续波被偏转到任意角度并被传送到生物体中。