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公开(公告)号：US07480577B1
公开(公告)日：2009-01-20
申请号：US11677149
申请日：2007-02-21
申请人： Murray F Feller
发明人： Murray F Feller
CPC分类号： G01F1/00 , G01F1/125 , G01F1/667 , G01F1/668 , G01F25/0007
摘要： Combining a plurality of local flow measurements made at more than one location to generate a composite flow value can improve the accuracy of the overall measurement. The reliability and long term accuracy of a multi-sensor flow measurement are improved by a two-step process. During an initial learning period, when all of the local sensors are providing accurate local measurements, a calibration table is built up that associates each calculated composite flow value with the set of local flow signal values from which it was calculated. In a subsequent operational period each time the composite flow rate is to be determined the flow meter apparatus first checks to see if all the local sensors are working properly and, if one of them is not working properly, its output is replaced with the corresponding value from the calibration table.
摘要翻译： 组合在多个位置处进行的多个局部流量测量以产生复合流量值可以提高整体测量的精度。 通过两步法改进多传感器流量测量的可靠性和长期精度。 在初始学习期间，当所有本地传感器都提供精确的局部测量值时，建立校准表，其将每个计算出的复合流量值与从其计算的一组本地流量信号值相关联。 在随后的运行期间，每当确定复合流量时，流量计装置首先检查所有本地传感器是否正常工作，并且如果其中一个不能正常工作，则其输出被相应的值替换 从校准表。
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公开(公告)号：US20060074570A1
公开(公告)日：2006-04-06
申请号：US11245129
申请日：2005-10-07
申请人： Brad Belke , Thomas MacArthur , Jack Hurford
发明人： Brad Belke , Thomas MacArthur , Jack Hurford
IPC分类号： G01F17/00
CPC分类号： G01F1/125 , G01F1/363 , G01F1/50 , G01F15/046 , G01F15/068
摘要： An electronic flow measurement device (EFM), for use in conjunction with a flow meter in a pressurized gas line, has a microprocessor and read-only memory (ROM), and calculates and records gas flow rates corrected for variable factors such as gas pressure, temperature, and density. Look-up tables stored in the ROM contain intermediate values calculated in accordance with selected protocols for selected ranges of input variables such as gas temperature, pressure, density, and turbine “K” factors. Based on inputs received from gas temperature and pressure sensors, the EFM selects corresponding intermediate values from the look-up tables, and then uses these values to calculate corrected gas flow rates, using software residing in the EFM. The microprocessor's power consumption is significantly reduced because the use of look-up tables reduces the complexity and extent of calculations that the EFM needs to perform, as compared with performing all required calculations in the EFM.
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公开(公告)号：US06990414B2
公开(公告)日：2006-01-24
申请号：US10790194
申请日：2004-03-02
申请人： Brad Belke , Thomas MacArthur , Jack Hurford
发明人： Brad Belke , Thomas MacArthur , Jack Hurford
IPC分类号： B01D46/46
CPC分类号： G01F1/125 , G01F1/50 , G01F15/046
摘要： An electronic flow measurement device (EFM), for use in conjunction with a flow meter in a pressurized gas line, has a microprocessor and read-only memory (ROM), and calculates and records gas flow rates corrected for variable factors such as gas pressure, temperature, and density. Look-up tables stored in the ROM contain intermediate values calculated in accordance with selected protocols for selected ranges of input variables such as gas temperature, pressure, density, and turbine “K” factors. Based on inputs received from gas temperature and pressure sensors, the EFM selects corresponding intermediate values from the look-up tables, and then uses these values to calculate corrected gas flow rates, using software residing in the EFM. The microprocessor's power consumption is significantly reduced because the use of look-up tables reduces the complexity and extent of calculations that the EFM needs to perform, as compared with performing all required calculations in the EFM.
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公开(公告)号：US06721669B2
公开(公告)日：2004-04-13
申请号：US10245555
申请日：2002-09-17
申请人： Manfred Köpl , Alfons Harding
发明人： Manfred Köpl , Alfons Harding
IPC分类号： G01F112
摘要： The present invention provides a flow meter whereby movement of fluid causes screw spindles or other movable elements to rotate and generate electronic pulses. The invention compensates for non-linearity in the relationship between the flow rate and the number of pulses, occurring particularly at low flow rates, by providing a device in the form of a transducer which assigns volume a value to each pules, which volume values are accumulated such that when certain predetermined value is exceeded a transducer generates a counter signal. Thus, the present invention enables compensation for non-linearity to be made and pulses output corresponding to a standard unit of volume.
摘要翻译： 本发明提供了一种流量计，其中流体的运动导致螺旋心轴或其它可移动元件旋转并产生电子脉冲。 本发明通过提供一种换能器形式的装置来补偿流量和脉冲数之间的关系中的非线性，特别是在低流量下发生，该装置将体积值分配给每个小孔，该体积值是 累积使得当超过某个预定值时，换能器产生计数器信号。 因此，本发明能够补偿对应于标准体积单位的非线性度和脉冲输出。
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公开(公告)号：US20030018440A1
公开(公告)日：2003-01-23
申请号：US10245555
申请日：2002-09-17
发明人： Manfred Kopl , Alfons Harding
IPC分类号： G01L007/00
摘要： The present invention provides a flow meter whereby movement of fluid causes screw spindles or other movable elements to rotate and generate electronic pulses. The invention compensates for non-linearity in the relationship between the flow rate and the number of pulses, occurring particularly at low flow rates, by providing a device in the form of a transducer which assigns volume a value to each pules, which volume values are accumulated such that when certain predetermined value is exceeded a transducer generates a counter signal. Thus, the present invention enables compensation for non-linearity to be made and pulses output corresponding to a standard unit of volume.
摘要翻译： 本发明提供了一种流量计，其中流体的运动导致螺旋心轴或其它可移动元件旋转并产生电子脉冲。 本发明通过提供一种换能器形式的装置来补偿流量和脉冲数之间的关系中的非线性，特别是在低流量下发生，该装置将体积值分配给每个小孔，该体积值是 累积使得当超过某个预定值时，换能器产生计数器信号。 因此，本发明能够补偿对应于标准体积单位的非线性度和脉冲输出。
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公开(公告)号：US5877430A
公开(公告)日：1999-03-02
申请号：US876086
申请日：1997-06-13
CPC分类号： G01F1/10 , G01F1/125 , G01F15/046
摘要： A turbine gas flow meter (10) includes a meter body (12) including an inlet portion (24) having an inlet body (32) mounted therein, with an exit end (30) of the body inlet portion being defined at an internal plenum (22) of the meter body, and a removable turbine meter measuring module (44) including a rotor assembly (48) which is inserted into the plenum with an inlet end (127) of the rotor assembly and the exit end of the inlet portion defining an interface therebetween. A closed space (114) is formed about the rotor assembly within the plenum between an inner wall (106) of the body and outer walls (116, 118) of the rotor assembly. An axial gap (128) between a surface (130) of the rotor assembly inlet end and a surface (132) of the body inlet portion exit end, and/or radial notches in either of the surfaces (130, 132), provide fluid pressure communication from the interface to the closed space. A pressure tap (138) extends through the body into the closed space for measuring pressure within the closed space.
摘要翻译： 涡轮气体流量计（10）包括仪表主体（12），其包括具有安装在其中的入口体（32）的入口部分（24），所述主体入口部分的出口端（30）限定在内部增压室 （22），以及可拆卸涡轮仪表测量模块（44），其包括转子组件（48），所述转子组件（48）插入到所述增压室中，所述转子组件具有所述转子组件的入口端（127）和所述入口部分的出口端 定义其间的接口。 在本体的内壁（106）和转子组件的外壁（116,118）之间的集气室内围绕转子组件形成封闭空间（114）。 在转子组件入口端的表面（130）与主体入口部分出口端的表面（132）和/或任一表面（130,132）中的/或径向凹口之间的轴向间隙（128）提供流体 从界面到封闭空间的压力通讯。 压力分接头（138）穿过主体延伸到封闭空间中，用于测量封闭空间内的压力。
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公开(公告)号：US5574229A
公开(公告)日：1996-11-12
申请号：US210927
申请日：1994-03-21
申请人： Juan B. Castillo
发明人： Juan B. Castillo
CPC分类号： G01F1/125 , G01F1/08 , G01F25/003
摘要： In conventional water meters, there is not a proportion between the flow velocity of water flowing through the meter and the movement of the part that measures, i.e., the rotation of the turbine. That lack of proportionality may be a cause of error. This problem is solved by an electronic automatic correction system, which compares the measurement data with a data base stored in its memory, effects the necessary corrections and supplies the exact reading of the actual volume of water used. The meter is able to detect low water flow and water leakage.
摘要翻译： 在传统的水表中，流过仪表的水流速与测量涡轮机的旋转部分的运动之间不存在一定比例。 缺乏相称性可能是错误的原因。 这个问题是通过电子自动校正系统来解决的，该系统将测量数据与存储在其存储器中的数据库进行比较，实现必要的校正，并提供所用水的实际体积的精确读数。 仪表能够检测到低水流量和漏水。
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8.发明授权Method and apparatus for assessing and quantifying pulsation induced error in gas turbine flow meters 失效用于评估和量化燃气轮机流量计脉动诱发误差的方法和装置
公开(公告)号：US5481924A
公开(公告)日：1996-01-09
申请号：US92270
申请日：1993-07-15
申请人： Cecil R. Sparks , Robert J. McKee
发明人： Cecil R. Sparks , Robert J. McKee
摘要： A method and apparatus for identifying, quantifying and correcting turbine meter errors related to pulsation effects in a gas stream being measured. A turbine meter pulse rate output signal is monitored and abnormal pulse rate modulations in the signal are detected and used to indicate turbine meter measurement errors. The equation used to determine turbine error requires measurements of pulsation intensity over a desired frequency range. Because of the difficulty in measuring pulsation intensity at field sites, meter error is determined directly from rotor speed modulation data. Rotor speed modulation data is obtained and then quantitatively related to pulsation intensity using a rotor response model. Thus, meter error is determined directly from rotor speed modulation data, allowing on-site quantification and correction of errors.
摘要翻译： 一种用于识别，量化和校正与所测量的气流中的脉动效应相关的涡轮仪表误差的方法和装置。 监测涡轮仪脉搏率输出信号，并检测信号中的异常脉搏调制，并用于指示涡轮仪表测量误差。 用于确定涡轮机故障的方程式需要测量所需频率范围内的脉动强度。 由于难以测量现场的脉动强度，故直接由转子速度调制数据确定仪表误差。 使用转子响应模型获得转子速度调制数据，然后定量地与脉动强度相关。 因此，直接从转子速度调制数据确定仪表误差，允许现场量化和校正误差。
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公开(公告)号：US4827430A
公开(公告)日：1989-05-02
申请号：US48307
申请日：1987-05-11
CPC分类号： G01F1/00 , A61M1/16 , A61M1/1647 , G01F1/08 , G01F1/125
摘要： A flow rate measurement system and method suitable for monitoring filtrate flow in a hemodialysis apparatus, provides a pair of flow meters in series at the input of a dialyzer for producing electrical signals indicative of dialysate flow rate and a pair of flow meters in series at the output of the dialyzer for producing electrical signals indicative of dialysate plus filtrate flow rate. A computer receives the flow rate signals and is programmed to calibrate each flow meter during a calibration phase to correct for any variations in each pair to thereby produce corrective scale factors. During an operational phase of the apparatus, the program monitors the flow meters and provides an alarm if any changes between the readings of either of the pairs of flow meters occurs.
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公开(公告)号：US4173891A
公开(公告)日：1979-11-13
申请号：US869004
申请日：1978-01-12
申请人： Nira C. Johnson
发明人： Nira C. Johnson
CPC分类号： G01F15/046 , G01F1/125
摘要： There is disclosed a gas flow measuring and calculating system including a transducer for measuring line or flow pressure of the gas flowing through a conduit, a transducer for measuring the line or flow temperature of the aforementioned gas, a turbometer for measuring the gas flow through the conduit, and calculation means in the form of a microprocessor for repetitively calculating with high accuracy the base gas flow in terms of standard cubic feet, wherein the supercompressibility factor is computed based upon values of measured gas temperature and pressure for specific entered values of specific gravity and of the gas compaction, and there are a plurality of computing steps for each calculation of the base gas flow. During each computing step, an initially approximated value of this supercompressibility factor or the previously-calculated value is used to calculate and display continuously an indication of the base gas flow, it being understood that each computer step is insufficient to recalculate the supercompressibility factor, this calculation taking a plurality of steps.
摘要翻译： 公开了一种气体流量测量和计算系统，包括用于测量流过管道的气体的流量或流量的换能器，用于测量上述气体的管线或流动温度的换能器，用于测量通过 管道和计算装置，其形式为微处理器，用于以标准立方英尺高度重复计算基础气体流量，其中基于特定输入的比重值的测量气体温度和压力的值计算超压缩系数 和气体压实，并且存在用于基础气体流的每个计算的多个计算步骤。 在每个计算步骤期间，使用该超级可压缩因子或先前计算的值的初始近似值来连续地计算和显示基础气体流量的指示，应当理解，每个计算机步骤不足以重新计算超压缩系数，这 计算采取多个步骤。
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