公开(公告)号：US06227059B1

公开(公告)日：2001-05-08

申请号：US09229452

申请日：1999-01-12

申请人： Michael N. Schott ,  Donald R. Cage ,  Larry K. Carmichael

发明人： Michael N. Schott ,  Donald R. Cage ,  Larry K. Carmichael

IPC分类号： G01F184

CPC分类号： G01F1/849 ,  G01F1/8427 ,  G01F1/8431 ,  G01F1/8436 ,  G01F15/024

摘要： A system for, and method of, compensating for a boundary condition effect on a Coriolis meter having (at least) two sensors for generating preliminary signals that are a function of fluid flow through the meter and a Coriolis meter employing the system or the method. In one embodiment, the system includes: (1) signal combination circuitry, couplable to the (at least) two sensors, that develops an imaginary difference signal based on the preliminary signals and (2) boundary effect compensation circuitry, coupled to the signal combination circuitry, that calculates a boundary effect compensation factor based on the imaginary difference signal.

摘要翻译： 用于补偿具有（至少）两个传感器的科里奥利仪表的边界条件效应的系统和方法，用于产生作为通过仪表的流体流动的函数的初步信号和采用该系统或方法的科里奥利仪表。 在一个实施例中，系统包括：（1）可耦合至（至少）两个传感器的信号组合电路，其基于初步信号产生虚拟差分信号，和（2）耦合到信号组合的边界效应补偿电路 电路，其基于虚差信号计算边界效应补偿因子。

公开(公告)号：US6164140A

公开(公告)日：2000-12-26

申请号：US169092

申请日：1998-10-09

申请人： Richard W. Kalinoski

发明人： Richard W. Kalinoski

IPC分类号： G01F1/84

CPC分类号： G01F1/8413 ,  G01F1/8422 ,  G01F1/8427 ,  G01F1/8472 ,  G01F1/849

摘要： A solid state transducer is provided for a Coriolis flow meter having a flow tube adapted to vibrate at a predetermined resonance frequency to determine mass flow rate of a fluid passing therethrough. The driver includes a strain element, such as an elongated piezoelectric or magnetostrictive element fastened axially along the wall of the tube. The strain element is adapted to oscillate in the axial direction along with the tube wall to generate and/or sense vibration of the tube in response to. The transducer may be utilized as a driver or alternatively, as a sensor wherein the transducer is oscillated along with oscillation of tube wall in the axial direction to generate an output signal responsive thereto.

摘要翻译： 提供了一种用于科里奥利流量计的固态换能器，其具有适于以预定的共振频率振动的流量管，以确定通过其中的流体的质量流量。 驱动器包括应变元件，例如沿着管的壁轴向紧固的细长的压电或磁致伸缩元件。 应变元件适于沿管壁沿轴向振荡，以响应于该管壁产生和/或感测管的振动。 传感器可以用作驱动器，或者可以用作传感器，其中传感器与管壁在轴向上的振荡一起振荡，以响应于此产生输出信号。

公开(公告)号：US6047457A

公开(公告)日：2000-04-11

申请号：US39788

申请日：1998-03-16

申请人： Ennio Bitto ,  Rainer Lorenz

发明人： Ennio Bitto ,  Rainer Lorenz

IPC分类号： G01F1/84 ,  B21D39/00

CPC分类号： G01F1/8404 ,  G01F1/8409 ,  G01F1/8413 ,  G01F1/8422 ,  G01F1/8427 ,  G01F1/849 ,  Y10T29/49927

摘要： This method of fastening a metal body to a an outer circumference of a single straight measuring tube, consisting of titanium or zirconium, of a Coriolis-type mass flow sensor does not need any heating, for example soldering, welding or brazing, process. The metal body has a circumferential surface and a bore adapted to the outer circumference. The metal body cooperates with an exciter arrangement or with a sensor arrangement or serves as a cantilever mass or as an end piece of the measuring tube. The metal body is pushed on to the measuring tube and is subsequently pressed on to the latter at ambient temperature. A pressure sufficient for fastening but not reducing substantially the lumen of the measuring tube at the fastening position is exerted on at least part of the circumferential surface.

摘要翻译： 将金属体紧固在由科氏力质量流量传感器的钛或锆组成的单个直的测量管的外周的方法不需要任何加热，例如焊接，焊接或钎焊工艺。 金属体具有圆周表面和适于外圆周的孔。 金属体与激励器配置或传感器装置配合或用作悬臂质量体或作为测量管的端部件。 将金属体推到测量管上，然后在环境温度下将其压到后者上。 在紧固位置的足够的紧固但基本上不减小测量管的内腔的压力被施加在周向表面的至少一部分上。

公开(公告)号：US5979246A

公开(公告)日：1999-11-09

申请号：US20704

申请日：1998-02-09

申请人： Craig Brainerd Van Cleve ,  Gregory Treat Lanham

发明人： Craig Brainerd Van Cleve ,  Gregory Treat Lanham

IPC分类号： G01F1/84

CPC分类号： G01F1/8409 ,  G01F1/8413 ,  G01F1/8418 ,  G01F1/849

摘要： A Coriolis flowmeter having a single straight flow tube, a balance bar parallel to said flow tube, a brace bar connecting ends of the balance bar to the flow tube and to a surrounding case. Improved dynamic balance of the flowmeter is maintained in response to changes in density of the flowing material by reducing the spring function of the balance bar and/or the flow tube. This concentrates the spring function of the flowmeter in the brace bar structure. A vibrational node in the brace bar structure separates the effective spring function of the balance bar from the effective spring function of the flow tube. The vibrational node moves within the brace bar in response to materials of different densities in the flow tube at different times. This nodal movement changes the ratio of the effective balance bar spring function to that of the effective flow tube spring function to maintain improved dynamic vibrational balance of the flowmeter without involving the case mass.

摘要翻译： 科里奥利流量计具有单个直流管，与所述流动管平行的平衡杆，将平衡杆的端部连接到流管和支撑杆的支杆。 通过减小平衡杆和/或流管的弹簧功能，可以响应于流动材料的密度变化而保持流量计的改进的动态平衡。 这将流量计的弹簧功能集中在支撑杆结构中。 支撑杆结构中的振动节点将平衡杆的有效弹簧功能与流量管的有效弹簧功能分开。 响应于流管中不同密度的材料，振动节点在支撑杆内移动。 该节点运动改变了有效平衡杆弹簧功能与有效流量管弹簧功能的比例，以保持流量计的动态振动平衡，而不涉及壳体质量。

公开(公告)号：US5918285A

公开(公告)日：1999-06-29

申请号：US981938

申请日：1997-12-30

申请人： Ronald Van der Pol

发明人： Ronald Van der Pol

IPC分类号： G01F1/84

CPC分类号： G01F1/8409 ,  G01F1/849

摘要： A mass flow meter for flowing media, which operates according to the Coriolis principle, has a straight Coriolis measuring tube, an oscillation generator acting on the Coriolis measuring tube, and at least one sensor detecting Coriolis forces and/or Coriolis oscillations based on Coriolis forces. The problem which results from the fact the mass flow meter has only one straight Coriolis measuring tube is largely eliminated by designing the Coriolis measuring tube as a flow channel of a thick-walled body, namely a thick-walled tube, the thick-walled tube having recesses accessible from the outside and reaching very close to the Coriolis measuring tube. The oscillation generator acts upon the residual material of the thick-walled tube remaining in the area of the recesses, and the Coriolis forces or Coriolis oscillations appearing in the area of the residual material of the thick-walled tube are detected by each sensor.

摘要翻译： PCT No.PCT / EP97 / 02556 Sec。 371日期1997年12月30日 102（e）1997年12月30日PCT PCT 1997年5月20日PCT公布。 公开号WO97 / 44640 PCT 日期1997年11月27日根据科里奥利原理运行的流动介质的质量流量计具有直的科里奥利测量管，作用在科里奥利测量管上的振荡发生器和至少一个检测科里奥利力和/或科里奥利的传感器 基于科里奥利力量的振荡。 质量流量计只有一条直线科里奥利测量管所产生的问题通过设计科里奥利测量管作为厚壁体的流道，即厚壁管，厚壁管， 具有从外部进入的凹部，并且非常靠近科里奥利测量管。 振荡发生器作用于残留在凹槽区域中的厚壁管的残余材料，并且由每个传感器检测出现在厚壁管的残余材料区域中的科里奥利力或科里奥利振荡。

公开(公告)号：US5831178A

公开(公告)日：1998-11-03

申请号：US705343

申请日：1996-08-29

申请人： Hiroyuki Yoshimura ,  Takahiro Kudo ,  Masami Kishiro

发明人： Hiroyuki Yoshimura ,  Takahiro Kudo ,  Masami Kishiro

IPC分类号： G01N9/00 ,  G01F1/84

CPC分类号： G01F1/849 ,  G01F1/8418 ,  G01F1/8431 ,  G01F1/8436 ,  G01N9/002 ,  B29C2043/046 ,  B29K2105/251

摘要： A vibration type measuring instrument measures at least one of a mass flow rate and a density of a fluid flowing through a straight measurement pipe by vibrating the measurement pipe, obtains a frequency ratio of a resonant frequency of a first vibration mode to a resonant frequency of a second vibration mode of the measurement pipe, and corrects a measured value of at least one of the mass flow rate and the density according to the frequency ratio. The instrument includes a first vibration detector for detecting at least one of a vibration generated in the measurement pipe depending on the mass flow rate and the resonant frequency of the first vibration mode of the measurement pipe; and a second vibration detector for detecting the resonant frequency of the second vibration mode of the measurement pipe. The second vibration detector is provided around an antinode of the second vibration mode of the measurement pipe to improve the detection sensitivity in the second vibration mode.

摘要翻译： 振动型测量仪器通过振动测量管来测量流过直线测量管的流体的质量流量和密度中的至少一个，获得第一振动模式的谐振频率与谐振频率的频率比 测量管的第二振动模式，并且根据频率比来校正质量流率和密度中的至少一个的测量值。 该仪器包括：第一振动检测器，用于根据质量流量和测量管的第一振动模式的共振频率来检测在测量管中产生的振动中的至少一个; 以及第二振动检测器，用于检测测量管的第二振动模式的共振频率。 第二振动检测器围绕测量管的第二振动模式的波腹设置，以提高第二振动模式下的检测灵敏度。

公开(公告)号：US5691485A

公开(公告)日：1997-11-25

申请号：US462734

申请日：1995-06-05

申请人： Takashi Endo ,  Kenichi Matsuoka ,  Kimihiro Ichinose ,  Hidemi Seki ,  Shingo Gomi

发明人： Takashi Endo ,  Kenichi Matsuoka ,  Kimihiro Ichinose ,  Hidemi Seki ,  Shingo Gomi

IPC分类号： G01F1/84

CPC分类号： G01F1/8409 ,  G01F1/8413 ,  G01F1/8418 ,  G01F1/849

摘要： Disclosed is a Coriolis flowmeter which is capable of detecting a mass flow and a density of fluid with an increased stability by resonantly oscillating a double tube portion consisting of an inner flow tube allowing fluid to flow therein and a coaxially disposed thereon counterbalance tube provided with a weight for equalizing the lateral natural frequency of the counterbalance tube with that of the flow tube. The Coriolis flowmeter has supporting metal means for supporting the both ends of the flow tube in such a way that the both ends of the flow tube is restricted in radial directions and axially movable in respective connecting flange; the inner flow tube has extending ends enlarged in diameter and supported in the respective connecting flanges of the outer housing. The flow tube is further supported at near-to-end portions on respective rectangle leaf springs having a plane parallel to oscillating direction and extending in radial direction of the double tube portion being perpendicular to the oscillating direction within the outer housing. The flow tube is thus supported at four stable points representing oscillating nodes, axially movable but radially restricted, assuring stable oscillation and accurate measurement of mass flow.

摘要翻译： 公开了一种科里奥利流量计，其能够通过共振振荡由允许流体流入其中的内部流管和由同轴设置的平衡管组成的双管部分共振振荡来检测流体的质量流量和密度，并提供稳定性， 用于使平衡管的横向固有频率与流动管的侧向固有频率相等。 科里奥利流量计具有用于支撑流管的两端的支撑金属装置，使得流管的两端在径向方向上受到限制，并在相应的连接凸缘中可轴向移动; 内流管具有直径增大的延伸端，并支撑在外壳的相应的连接凸缘中。 流管在靠近振荡方向的平面的矩形片弹簧的近端部进一步被支撑，并且在双壳部分的径向方向上垂直于外壳内的摆动方向延伸。 因此，流管被支撑在表示振动节点的四个稳定点处，轴向可移动但径向限制，确保稳定的振荡和质量流量的精确测量。

公开(公告)号：US5578764A

公开(公告)日：1996-11-26

申请号：US498310

申请日：1995-07-05

申请人： Toyoaki Yokoi ,  Hiroshi Owada

发明人： Toyoaki Yokoi ,  Hiroshi Owada

IPC分类号： G01F1/84

CPC分类号： G01F1/8431 ,  G01F1/8436 ,  G01F1/849

摘要： A Coriolis type mass flowmeter utilizing a measuring tube through which flows the fluid being examined and a pair of Coriolis signals generated thereby, wherein are provided a first and second A/D converter to convert the respective pair of Coriolis signals into respective digital signals; a first and second phase shifter for converting the respective digital signals to output signals each deviated from the respective digital signals by 90.degree.; a timing clock generator for supplying the first and second A/D converter with timing signals which are independent of vibrations of the Coriolis signals, and trigonometric calculating device for obtaining tan .PHI. using the following equation: tan .PHI.=(bc-ad)/(ac+bd), wherein a and c represent the outputs from the A/D converters, and b and d represent the outputs from the phase shifters, and tan .PHI. represents the tangent signal of the phase difference between the pair of Coriolis signals, whereby the speed of calculation is considerably increased and error of calculation is substantially eliminated.

摘要翻译： 科里奥利型质量流量计利用测量管流动被检测的流体和由此产生的一对科里奥利信号，其中设置有第一和第二A / D转换器，以将各对科里奥利信号转换为相应的数字信号; 第一和第二移相器，用于将各个数字信号转换成各自数字信号偏离90°的输出信号; 用于向第一和第二A / D转换器提供与科里奥利信号的振动无关的定时信号的定时时钟发生器，以及使用以下等式获得tan PHI的三角计算装置：tan PHI =（bc-ad）/（ ac + bd），其中a和c表示来自A / D转换器的输出，b和d表示来自移相器的输出，tan PHI表示科里奥利信号对之间的相位差的切线信号，由此 计算速度大大增加，计算误差基本上消除。

公开(公告)号：US5531126A

公开(公告)日：1996-07-02

申请号：US277245

申请日：1994-07-19

申请人： Wolfgang Drahm

发明人： Wolfgang Drahm

IPC分类号： G01F1/84 ,  G01N9/00

CPC分类号： G01F1/8409 ,  G01F1/8418 ,  G01F1/8422 ,  G01F1/8431 ,  G01F1/849 ,  G01N9/002

摘要： This mass flow sensor is to be fitted with two straight tubes, but conventionally needed manifolds are to be dispensed with. The sensor can be installed, by flanges, in a conduit of a given diameter so as to be axially aligned with the conduit, through which flows a fluid to be measured. It has a straight measuring tube, which extends between the flanges and is traversed by the fluid, and a straight dummy tube, which extends parallel to the measuring tube and is not traversed by the fluid. Also provided are a nodal plate on the inlet side and a nodal plate on the outlet side, one of which fixes the inlet-side end portion of the measuring tube to the corresponding end portion of the dummy tube, and the other of which fixes the outlet-side end portion of the measuring tube to the corresponding end portion of the dummy tube, such that the measuring tube and the dummy tube are arranged side by side. A support tube has its ends fixed to the respective flanges. A circuit for exciting resonance vibrations of the measuring tube acts only on the dummy tube. The measuring tube and dummy tube may also be coaxial with one another.

摘要翻译： 该质量流量传感器要安装两根直管，但要省去常规的歧管。 传感器可以通过法兰安装在给定直径的管道中，以便与导管轴向对准，通过该导管流动要测量的流体。 它具有直的测量管，其在凸缘之间延伸并被流体横穿，并且具有平行于测量管延伸并且不被流体穿过的直的虚拟管。 还有一个入口侧的节点板和出口侧的节点板，其中一个将测量管的入口侧端部固定到虚拟管的相应的端部，另一个固定了 测量管的出口侧端部到虚拟管的相应端部，使得测量管和虚拟管并排布置。 支撑管的端部固定在相应的凸缘上。 用于激发测量管的共振振动的电路仅作用在虚拟管上。 测量管和虚拟管也可以彼此同轴。

公开(公告)号：US5423225A

公开(公告)日：1995-06-13

申请号：US149713

申请日：1993-11-09

申请人： Donald R. Cage

发明人： Donald R. Cage

IPC分类号： G01F1/84 ,  G01L9/00 ,  G01N9/00

CPC分类号： G01F15/024 ,  G01F1/8409 ,  G01F1/8413 ,  G01F1/8418 ,  G01F1/8436 ,  G01F1/8463 ,  G01F1/849 ,  G01L9/0008 ,  G01N9/002 ,  G01N2009/006

摘要： A flow meter apparatus for measuring the mass flow rate of a fluid using the Coriolis principle. A single straight flow conduit is employed which is vibrated in a radial-mode of vibration. Coriolis forces are thereby produced along the walls of the flow conduits which deform the conduits cross-sectional shape as a function of mass flow rate. Additional embodiments are disclosed employing radial vibration of selected portions of the flow conduit walls.

摘要翻译： 一种用于使用科里奥利原理测量流体质量流量的流量计装置。 使用以径向振动模式振动的单个直流导管。 因此，沿流动管道的壁产生科里奥利力，其将导管的横截面形状变为质量流量的函数。 公开了采用流动导管壁的选定部分的径向振动的附加实施例。