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公开(公告)号：US5793478A
公开(公告)日：1998-08-11
申请号：US752337
申请日：1996-11-19
Applicant: Daniel J. Rader , Jaime N. Castaneda , Thomas W. Grasser , John E. Brockmann
Inventor： Daniel J. Rader , Jaime N. Castaneda , Thomas W. Grasser , John E. Brockmann
CPC classification number: G01N15/0205 , G01F1/661 , G01P5/20
Abstract: An apparatus for determining particle properties from detected light scattered by the particles. The apparatus uses a light beam with novel intensity characteristics to discriminate between particles that pass through the beam and those that pass through an edge of the beam. The apparatus can also discriminate between light scattered by one particle and light scattered by multiple particles. The particle's size can be determined from the intensity of the light scattered. The particle's velocity can be determined from the elapsed time between various intensities of the light scattered.
Abstract translation: 一种用于通过由颗粒散射的检测光来确定颗粒特性的装置。 该装置使用具有新颖强度特性的光束来区分通过光束的粒子和通过光束的边缘的粒子。 该装置还可以区分由一个颗粒散射的光和由多个颗粒散射的光。 颗粒的大小可以从散射光的强度确定。 颗粒的速度可以从散射光的各种强度之间的经过时间确定。
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公开(公告)号：US5684572A
公开(公告)日：1997-11-04
申请号：US508492
申请日：1995-07-28
Applicant: Karl-Aloys Butefisch
Inventor： Karl-Aloys Butefisch
Abstract: In a method for determing the velocity of a flow seeded with particles reflecting light, the particles located in a light sheet (4) are illuminated with monochromatic light (5). The doppler-shifted frequency of the light reflected sideways out of the light sheet (4) by the particles is determined, and the velocity of the flow is determined from the doppler-shifted frequency. The un-shifted frequency of the monochromatic light with which the particles in the light sheet are illuminated is determined continously, and is used as a basis for the determination of the velocity of the flow from the doppler-shifted frequency.
Abstract translation: 在用于确定用反射光的颗粒的流速测定的方法中，位于光板（4）中的颗粒用单色光（5）照射。 确定通过颗粒侧向反射出光板（4）的光的多普勒偏移频率，并根据多普勒偏移频率确定流速。 光源中的颗粒被照射的单色光的未移动频率被连续地确定，并且被用作用于确定来自多普勒频移的频率的流速的基础。
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133.发明授权
公开(公告)号：US5488224A
公开(公告)日：1996-01-30
申请号：US221322
申请日：1994-03-31
Applicant: John E. Fagan , James J. Sluss, Jr. , John W. Hassell , R. Brian Mears , Ronnie B. Beason , Sonja R. Wilkinson , Tommy Lear , Kok S. Tan
Inventor： John E. Fagan , James J. Sluss, Jr. , John W. Hassell , R. Brian Mears , Ronnie B. Beason , Sonja R. Wilkinson , Tommy Lear , Kok S. Tan
CPC classification number: G01D5/353 , G01D5/35377 , G01D7/04 , G01F1/661 , G01P5/001
Abstract: A system for characterizing the pressure, temperature, movement and flow patterns of a fluid under high pressure within a test cell. The test cell is lined internally with adjustable rock facings. Pressure is measured within the test cell using a device employing pressure-distortable optical fibers. Fluid velocity, flow direction, and filter-cake buildup are measured with laser Doppler velocimetry. The flow pattern of the fluid is viewed using corresponding arrays of transmitting and receiving optical fibers. Temperature of the fluid is estimated using a combination of thermal sensors. The pressure, velocity, viewing and temperature systems are integral to the rock facings of the test cell.
Abstract translation: 用于表征测试池内的高压下的流体的压力，温度，运动和流动模式的系统。 测试单元内部衬有可调节的岩石表面。 使用采用压力变形光纤的装置在测试电池内测量压力。 用激光多普勒测速仪测量流体速度，流动方向和滤饼积聚。 使用相应的发射和接收光纤阵列观察流体的流动模式。 使用热传感器的组合来估计流体的温度。 压力，速度，观察和温度系统与测试电池的岩石面积是一体的。
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公开(公告)号：US5333044A
公开(公告)日：1994-07-26
申请号：US980894
申请日：1992-11-24
Applicant: Franklin D. Shaffer
Inventor： Franklin D. Shaffer
CPC classification number: A61B5/0261 , G01F1/661 , G01F1/7086 , G01P5/001
Abstract: A multiple-exposure fluorescent image tracking velocimeter (FITV) detects and measures the motion (trajectory, direction and velocity) of small particles close to light scattering surfaces. The small particles may follow the motion of a carrier medium such as a liquid, gas or multi-phase mixture, allowing the motion of the carrier medium to be observed, measured and recorded. The main components of the FITV include: (1) fluorescent particles; (2) a pulsed fluorescent excitation laser source; (3) an imaging camera; and (4) an image analyzer. FITV uses fluorescing particles excited by visible laser light to enhance particle image detectability near light scattering surfaces. The excitation laser light is filtered out before reaching the imaging camera allowing the fluoresced wavelengths emitted by the particles to be detected and recorded by the camera. FITV employs multiple exposures of a single camera image by pulsing the excitation laser light for producing a series of images of each particle along its trajectory. The time-lapsed image may be used to determine trajectory and velocity and the exposures may be coded to derive directional information.
Abstract translation: 多曝光荧光图像跟踪测速仪（FITV）检测并测量靠近光散射表面的小颗粒的运动（轨迹，方向和速度）。 小颗粒可以遵循诸如液体，气体或多相混合物的载体介质的运动，允许观察，测量和记录载体介质的运动。 FITV的主要组成部分包括：（1）荧光颗粒; （2）脉冲荧光激发激光源; （3）成像相机; 和（4）图像分析仪。 FITV使用由可见激光激发的荧光粒子来增强光散射表面附近的粒子图像检测能力。 在到达成像相机之前，激发激光被滤出，允许由相机检测和记录由颗粒发射的荧光波长。 FITV通过脉冲激发激光来产生单个相机图像的多次曝光，以沿其轨迹产生每个粒子的一系列图像。 可以使用经过时间的图像来确定轨迹和速度，并且曝光可以被编码以导出方向信息。
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公开(公告)号：US5085073A
公开(公告)日：1992-02-04
申请号：US146939
申请日：1988-01-22
Applicant: Joseph S. Heyman , D. Michele Heath , Christopher S. Welch , William P. Winfree , William E. Miller
Inventor： Joseph S. Heyman , D. Michele Heath , Christopher S. Welch , William P. Winfree , William E. Miller
Abstract: A sample in a wind tunnel is radiated from a thermal energy source exteriorly of the wind tunnel. A thermal imager system, also located exteriorly of the wind tunnel, reads surface radiations from the sample as a function of time. The produced thermal images are characteristic of the heat transferred from the sample to the flow across the sample. In turn, the measured rates of heat loss of the sample are characteristic of the flow and the sample.
Abstract translation: 风洞中的样品从风洞外部的热能源辐射。 也位于风洞外部的热像仪系统将样品中的表面辐射作为时间的函数读取。 所产生的热图像是从样品传递到穿过样品的流的热的特征。 反过来，样品的测量热损失率是流量和样品的特征。
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Patent Agency Ranking
公开(公告)号：US5011279A
公开(公告)日：1991-04-30
申请号：US205353
申请日：1988-06-10
Applicant: Helmut Auweter , Dieter Horn , Dieter Lilge , Juergen Wortmann
Inventor： Helmut Auweter , Dieter Horn , Dieter Lilge , Juergen Wortmann
CPC classification number: G01P5/26 , G01F1/661 , G01N21/51 , G01J3/4406 , G01N2015/0222 , G01N2021/4709 , G01N21/8507 , G01N2201/08
Abstract: In a fiber-optical sensor used for measuring the Doppler broadening of scattered laser light by the principle of quasi-elastic light scattering (QELS), the scattered light originating from particles in movement, the emergence surface (7) for the laser light at the end of a single-mode or multimode light guide (3) used as an immersion probe is inclined at an angle 0
Abstract translation: 在用于通过准弹性光散射（QELS）原理测量散射激光的多普勒加宽的光纤传感器中，源自运动中的粒子的散射光，用于激光的出射表面（7） 用作浸入式探针的单模或多模光导（3）的端部以0°/°15°的角度倾斜，优选为1°= 6°，倾角为 由光导（3）的光轴（8）和出射表面（7）的法线（9）进行精加工。
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137.发明授权Method and apparatus for determining the material flow rate of conveying mechanisms 失效用于确定输送机构的材料流速的方法和装置
公开(公告)号：US4749273A
公开(公告)日：1988-06-07
申请号：US781113
申请日：1985-09-27
Applicant: Bodo Reinhold
Inventor： Bodo Reinhold
CPC classification number: G01S17/87 , G01F1/002 , G01F1/661 , G01F23/292
Abstract: A method and apparatus for determining the material flow rate of bulk material, transported by belt conveyers or the like, by continuously determining the contour of the free surface of the bulk material, at right angles to the direction of transport, via continuous non-contact distant measurement using transmitter-receiver mechanisms coupled with a computer, and by computing the cross section of the bulk material. A precise and reliable measurement of the height of bulk material on the conveyer belt is achieved by using, as the transmitter-receiver mechanisms, respective laser distance-measuring devices which emit and receive a reflecting laser beam. These devices preferably operate pursuant to the pulse transit time measuring principle. The laser distance-measuring devices are accommodated in a housing.
Abstract translation: 一种用于通过连续非接触式连续地确定大块材料的自由表面的轮廓与运输方向成直角的方法和装置，用于确定散装材料的材料流速，由带式输送机等输送。 使用与计算机耦合的发射机 - 接收机机构进行远程测量，并通过计算散装材料的横截面。 通过使用发射和接收反射激光束的相应的激光测距装置，作为发射机 - 接收机构，实现了传送带上散装材料高度的精确和可靠的测量。 这些装置优选地根据脉冲传播时间测量原理进行操作。 激光测距装置容纳在壳体中。
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公开(公告)号：US4519259A
公开(公告)日：1985-05-28
申请号：US470662
申请日：1983-02-28
Applicant: Gillies D. Pitt , Roger J. Williamson , David N. Batchelder , Arulanandam M. Prabakaran
CPC classification number: G01F1/3245 , G01F1/661
Abstract: In order to determine the vortex shedding frequency, from which the fluid flow rate may be calculated, an optical beam, such as produced by a laser, is passed through a fluid, transversely to a vortex street therein, and modulated in dependence on the alternate high and low velocity regions comprising the vortex street. The modulated signal is detected and "cleaned" of noise by filtering with a first (high) band-pass filter of a center frequency f.sub.c, such that the first filter output comprises an amplitude modulated signal of carrier frequency f.sub.c modulated by the vortex shedding frequency, that is the frequency of oscillation of the power spectra between the respective curves for the high and low velocity regions. The first filter output is demodulated and filtered by a second (low) band-pass filter, whose output is of a frequency comprising the vortex shedding frequency.
Abstract translation: 为了确定可以计算流体流速的涡流脱落频率，诸如由激光产生的光束横穿于其中的涡街，流过流体，并根据交替的方式进行调制 包括涡街的高低速区域。 通过用中心频率fc的第一（高）带通滤波器进行滤波来检测和“清除”噪声，使得第一滤波器输出包括由涡旋脱落频率调制的载波频率fc的调幅信号 ，即高速和低速区各曲线之间功率谱的振荡频率。 第一滤波器输出被第二（低）带通滤波器解调和滤波，其输出是包括涡流脱落频率的频率。
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公开(公告)号：US4480483A
公开(公告)日：1984-11-06
申请号：US482736
申请日：1983-04-06
Applicant: James L. McShane
Inventor： James L. McShane
IPC: G01F1/66
Abstract: A flowmeter wherein measurements relating to fluid flowing in a pipe are obtained by transmitting a laser beam from a high power pulsed laser into the fluid through an optical window in the pipe. The beam in the fluid causes a rapid thermal expansion of the fluid which generates a pressure pulse which travels axially up and down the pipe. Continuously operating low power laser beams are projected into the fluid at points displaced from the source of the acoustic pulse and these beams are modulated when the acoustic pulse passes them. The modulation is detected to obtain first and second transit times, these transit times being utilized to compute the desired fluid flow parameters.
Abstract translation: 一种流量计，其中与在管道中流动的流体有关的测量是通过将激光束从高功率脉冲激光器通过管道中的光学窗口传输到流体中获得的。 流体中的光束导致流体的快速热膨胀，其产生沿管道上下和向下行进的压力脉冲。 连续工作的低功率激光束在从声脉冲的源偏离的点处投射到流体中，并且当声脉冲通过它们时这些光束被调制。 检测调制以获得第一和第二传送时间，这些传送时间用于计算所需的流体流量参数。
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140.发明授权
公开(公告)号：US4166961A
公开(公告)日：1979-09-04
申请号：US888859
申请日：1978-03-22
Applicant: Naim G. Dam , John P. Hufnagel
Inventor： Naim G. Dam , John P. Hufnagel
CPC classification number: B01D65/104 , A61M1/1692 , G01F1/661 , G01M3/38
Abstract: A blood leak in the dialyzer is detected by transmitting a pulsed beam of light into the dialysate flowstream at a predetermined angle of incidence between the central axis of the flowstream and the normal axis and measuring variations in reflecting light received by a photodetector arranged on the same side of the flowstream as the phototransmitter at a predetermined angle of reflection. The beam of light is interupted at a rate with a substantially equal on-time to off time ratio.
Abstract translation: 透析器中的血液泄漏是通过以脉冲流束流以流量的中心轴与法线轴之间的预定入射角将透射脉冲光束传输到透析液流中，并测量由布置在其上的光检测器所接收的反射光的偏差 在预定的反射角度作为光引发剂的流动流侧。 光束以基本相等的导通时间与关闭时间比率的速率中断。
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