公开(公告)号：US4773253A

公开(公告)日：1988-09-27

申请号：US110108

申请日：1987-10-15

申请人： Edward E. Francisco, Jr.

发明人： Edward E. Francisco, Jr.

IPC分类号： G01N9/34 ,  G01N9/32

CPC分类号： G01N9/34

摘要： A freely rotatable turbine is placed in the path of flowing fluid to drive the turbine at an angular velocity that, at steady state, is dependent upon the linear velocity of the flowing fluid. A transient condition is created in the angular velocity of the turbine. The time constant of the transient condition is determined. The time constant is representative of the density of the flowing fluid--the shorter the time constant, the higher the density and vice versa. The transient condition is created by disturbing the free rotation of the turbine, namely, by imnpairing free rotation to reduce the angular velocity of the turbine to zero, and then permitting the turbine to return to free rotation.

摘要翻译： 可自由旋转的涡轮机被放置在流动流体的路径中以以稳定状态取决于流动流体的线速度的角速度驱动涡轮机。 在涡轮机的角速度中产生瞬态条件。 确定瞬态条件的时间常数。 时间常数代表流动流体的密度 - 时间常数越短，密度越高，反之亦然。 通过干扰涡轮机的自由旋转，即通过对自由旋转进行自由旋转以将涡轮机的角速度降低到零，然后允许涡轮返回到自由旋转而产生瞬态。

公开(公告)号：US4152922A

公开(公告)日：1979-05-08

申请号：US907681

申请日：1978-05-19

申请人： Edward E. Francisco, Jr.

发明人： Edward E. Francisco, Jr.

IPC分类号： G01F1/28 ,  G01F25/00

CPC分类号： G01F25/0007

摘要： A measuring cylinder has at its ends an inlet and an outlet connected in a fluid system in series with a flowmeter. A measuring piston is adapted to travel through the measuring cylinder as a fluid barrier. A poppet valve on the inlet side of the measuring piston is adapted to seal a passage through the measuring piston when closed so the measuring piston travels through the measuring cylinder as a fluid barrier, and to permit fluid flow through the passage when open. A retracting piston is adapted to travel through a retracting cylinder having a smaller cross-sectional area than the measuring cylinder as a fluid barrier. A rod is connected between the retracting cylinder and the poppet valve to open and close the poppet valve as the retracting piston moves relative to the measuring piston. The movement of the retracting piston through the retracting cylinder is controlled so as to hold the measuring piston at an upstream position of the measuring cylinder prior to a test run, to release the measuring piston when a test run is initiated, and to return the measuring cylinder to the upstream position after the test run. In one embodiment, the movement of the retracting cylinder is controlled during the test run to maintain a constant difference in pressure between the upstream and downstream sides of the measuring piston.

摘要翻译： 量筒在其端部具有与流量计串联的流体系统中的入口和出口。 测量活塞适于作为流体屏障穿过量筒。 在测量活塞的入口侧的提升阀适于在关闭时密封通过测量活塞的通道，使得测量活塞作为流体屏障行进通过量筒，并且当打开时允许流体流过通道。 回缩活塞适于作为流体屏障穿过具有比量筒更小的横截面积的缩回圆柱体。 当收回活塞相对于测量活塞移动时，杆连接在回缩缸和提升阀之间以打开和关闭提升阀。 控制回缩活塞通过回缩缸的运动，以便在测试运行之前将测量活塞保持在量筒的上游位置，以便在测试运行开始时释放测量活塞，并使测量 气瓶到试验运行后的上游位置。 在一个实施例中，在测试运行期间控制回缩缸的运动，以保持测量活塞的上游侧和下游侧之间的恒定的压力差。

公开(公告)号：US4766759A

公开(公告)日：1988-08-30

申请号：US23658

申请日：1987-03-09

申请人： Gary D. Cohrs ,  Edward E. Francisco, Jr.

发明人： Gary D. Cohrs ,  Edward E. Francisco, Jr.

IPC分类号： G01F25/00

CPC分类号： G01F25/0015

摘要： A mechanical displacement flowmeter calibrator has a first fluid line external of the measuring cylinder of the calibrator connected between the inlet and outlet thereof. A flowmeter that produces flow-representative pulses is connected in the fluid line. A rod is connected to a measuring piston adapted to travel through the measuring cylinder as a fluid barrier. The rod drives the measuring piston through the measuring cylinder at a predetermined, constant speed and thereby determines the flow rate of the calibration. The displacement of the measuring piston is sensed as it travels through the measuring cylinder during a test run, while the pulses produced by the flowmeter are counted during the time interval in which the piston displaces a given volume. The flowmeter is preferably connected in the fluid line at the pressure null point. First and second annular edge seals around the periphery of the measuring piston form an annular cavity into which pressurized fluid, preferably a lubricant, is injected. Before a test run, fluid flow in a second fluid line, external of the measuring cylinder, is induced, thereby establishing a closed loop around the first and second fluid lines and the measuring cylinder. To initiate a test run, fluid flow through the second fluid line is blocked to operate the measuring piston. Simultaneously therewith, the measuring piston is driven through the measuring cylinder from end-to-end to execute a test run.

摘要翻译： 机械位移流量计校准器具有连接在其入口和出口之间的校准器的量筒的外部的第一流体管线。 在流体管线中连接产生流动代表脉冲的流量计。 杆连接到适于作为流体屏障行进通过量筒的测量活塞。 杆以预定的恒定速度驱动测量活塞通过量筒，从而确定校准的流量。 测量活塞的位移在测试运行期间通过量筒而被感测，而在活塞移动给定体积的时间间隔期间，由流量计产生的脉冲进行计数。 流量计优选在压力零点处连接在流体管线中。 围绕测量活塞周边的第一和第二环形边缘密封件形成环形空腔，加压流体，优选地是润滑剂被注入到其中。 在测试运行之前，感应在量筒外部的第二流体管线中的流体流动，从而在第一和第二流体管线和量筒周围建立闭合回路。 为了启动测试运行，流过第二流体管线的流体被阻塞以操作测量活塞。 同时，测量活塞从端对端被驱动通过测量缸，以执行测试运行。

公开(公告)号：US06732570B2

公开(公告)日：2004-05-11

申请号：US10410076

申请日：2003-04-09

申请人： Edward E. Francisco, Jr.

发明人： Edward E. Francisco, Jr.

IPC分类号： G01N900

CPC分类号： G01N9/002 ,  G01F1/8468 ,  G01N2203/0051 ,  G01N2203/0075 ,  G01N2203/0094 ,  G01N2203/0623 ,  G01N2203/0688

摘要： A tube through which fluid flows is installed in a fluid system. A piezoelectric driver is mounted on the exterior of the tube. A piezoelectric sensor is also mounted on the exterior of the tube. A feedback loop from the sensor to the driver is adapted to cause vibrations in the tube at its resonant frequency or a harmonic thereof. One or more strain gauges mounted on the exterior wall of the tube sense the strain exerted on the exterior wall by the pressure of the fluid flowing through the tube. A temperature sensor mounted on the exterior wall of the tube senses temperature. A microprocessor determines the density of the fluid flowing through the tube responsive to the piezoelectric sensor, temperature sensor and the one or more strain gauges. The one or more strain gauges comprise a bridge circuit. Strain gauges comprise two arms of the bridge circuit and temperature dependent resistors comprise the other two arms of the bridge. The output from the one or more strain gauges is used to correct the frequency reading given by the piezoelectric sensor.

摘要翻译： 流体流过的管安装在流体系统中。 压电驱动器安装在管的外部。 压电传感器也安装在管的外部。 从传感器到驱动器的反馈回路适于使管中的振动处于其谐振频率或其谐波。 安装在管的外壁上的一个或多个应变计通过流过管的流体的压力感测施加在外壁上的应变。 安装在管外壁上的温度传感器感测温度。 微处理器响应于压电传感器，温度传感器和一个或多个应变计来确定流过管的流体的密度。 一个或多个应变计包括桥接电路。 应变计包括桥接电路的两个臂，温度依赖电阻器包括桥的另外两个臂。 来自一个或多个应变计的输出用于校正由压电传感器给出的频率读数。

公开(公告)号：US5974858A

公开(公告)日：1999-11-02

申请号：US71730

申请日：1998-05-01

申请人： Edward E. Francisco, Jr. ,  Gary D. Cohrs

发明人： Edward E. Francisco, Jr. ,  Gary D. Cohrs

IPC分类号： G01N9/00

CPC分类号： G01N9/002

摘要： A densimeter is provided that is mounted on the side of a conduit carrying a fluid flow. The densimeter consists of an inlet and an outlet scoop which are immersed into the fluid flow through the conduit. A portion of the fluid flow enters into the first scoop and is directed into the densimeter where the fluid's density is measured and then exits through the exit scoop back into the fluid flow in the conduit.

摘要翻译： 提供了一种安装在承载流体流动的导管侧的密度计。 密度计由入口和出口勺组成，浸入通过导管的流体流中。 流体流的一部分进入第一勺并且被引导到测量流体密度的密度计中，然后通过出口勺返回到导管中的流体流中。

公开(公告)号：US5072416A

公开(公告)日：1991-12-10

申请号：US497729

申请日：1990-03-19

申请人： Edward E. Francisco, Jr. ,  Gary D. Cohrs ,  Samuel H. Smith

发明人： Edward E. Francisco, Jr. ,  Gary D. Cohrs ,  Samuel H. Smith

IPC分类号： G01F25/00

CPC分类号： G01F25/0007 ,  G01F25/0015 ,  G01F25/003

摘要： A double cycle prover is used to calibrate meters which require long proving runs. A small volume or piston prover and a master flowmeter, are coupled in series with the meter under test, then the master flowmeter is calibrated against the small volume prover, and the meter under test is calibrated against the master flowmeter. A signal processor combines the proving cycles, to relate the small volume prover to the meter under test. A density meter is connected to the flow channel, if the meter under test is a mass flowmeter, and the signal processor uses the density measurement to relate the mass flow measurement of the meter under test with the volume flow measurement of the master flowmeter.

摘要翻译： 使用双周期证明器来校准需要长时间证明运行的仪表。 小容量或活塞式检测器和主流量计与被测仪表串联，然后根据小体积证明器校准主流量计，并根据主流量计对被测量表进行校准。 信号处理器结合了证明周期，将小体积证明者与被测仪表相关联。 如果被测仪表是质量流量计，则密度计连接到流量通道，信号处理器使用密度测量将被测仪表的质量流量测量与主流量计的体积流量测量值相关联。

公开(公告)号：US4996869A

公开(公告)日：1991-03-05

申请号：US271090

申请日：1988-11-14

申请人： Gary D. Cohrs ,  Samuel H. Smith ,  Edward E. Francisco, Jr.

发明人： Gary D. Cohrs ,  Samuel H. Smith ,  Edward E. Francisco, Jr.

IPC分类号： G01F25/00

CPC分类号： G01F25/0015

摘要： A moveable fluid barrier (16) is driven from an upstream position to a downstream position through a measuring cylinder (18) connected fluidically in series with the flowmeter (22) under test to induce fluid flow therethrough at a flow rate related to the movement of the barrier. The response of the flowmeter is sensed during a plurality of time intervals as the barrier is driven through the conduit from the upstream position toward the downstream position in the course of a test run. The movement of the fluid barrier is also sensed (28) during these intervals. From the flowmeter response and the fluid barrier movement, a K-factor sample is determined for each interval. The K-factor samples are compared (12) with each other to selected a valid K-factor data point for the particular test run. Specifically, the criterion for determining a valid K-factor data point is the variation between K-factor samples under comparison.

摘要翻译： 可移动流体屏障（16）从上游位置驱动到下游位置，通过与待测流量计（22）流体连接的量筒（18），以便以与流体流动相关的流速 屏障。 在测试运行过程中当屏障通过导管从上游位置向下游位置被驱动时，在多个时间间隔内检测流量计的响应。 在这些间隔期间也感测到流体屏障的移动（28）。 根据流量计响应和流体阻挡运动，每个间隔确定一个K因子样本。 将K因子样本彼此进行比较（12）以为特定测试运行选择有效的K因子数据点。 具体地说，用于确定有效K因子数据点的标准是比较K因子样本之间的变化。

公开(公告)号：US4627267A

公开(公告)日：1986-12-09

申请号：US757272

申请日：1985-07-19

申请人： Gary D. Cohrs ,  Edward E. Francisco, Jr.

发明人： Gary D. Cohrs ,  Edward E. Francisco, Jr.

IPC分类号： G01F25/00

CPC分类号： G01F25/0015

摘要： A mechanical displacement flowmeter calibrator has a first fluid line external of the measuring cylinder of the calibrator connected between the inlet and outlet thereof. A flowmeter that produces flow-representative pulses is connected in the fluid line. A rod is connected to a measuring piston adapted to travel through the measuring cylinder as a fluid barrier. The rod drives the measuring piston through the measuring cylinder at a predetermined, constant speed and thereby determines the flow rate of the calibration. The displacement of the measuring piston is sensed as it travels through the measuring cylinder during a test run, while the pulses produced by the flowmeter are counted during the time interval in which the piston displaces a given volume. The flowmeter is preferably connected in the fluid line at the pressure null point. First and second annular edge seals around the periphery of the measuring piston form an annular cavity into which pressurized fluid, preferably a lubricant, is injected. Before a test run, fluid flow in a second fluid line, external of the measuring cylinder, is induced, thereby establishing a closed loop around the first and second fluid lines and the measuring cylinder. To initiate a test run, fluid flow through the second fluid line is blocked to operate the measuring piston. Simultaneously therewith, the measuring piston is driven through the measuring cylinder from end-to-end to execute a test run.

摘要翻译： 机械位移流量计校准器具有连接在其入口和出口之间的校准器的量筒的外部的第一流体管线。 在流体管线中连接产生流动代表脉冲的流量计。 杆连接到适于作为流体屏障行进通过量筒的测量活塞。 杆以预定的恒定速度驱动测量活塞通过量筒，从而确定校准的流量。 测量活塞的位移在测试运行期间通过量筒而被感测，而在活塞移动给定体积的时间间隔期间，由流量计产生的脉冲进行计数。 流量计优选在压力零点处连接在流体管线中。 围绕测量活塞周边的第一和第二环形边缘密封件形成环形空腔，加压流体，优选地是润滑剂被注入到其中。 在测试运行之前，感应在量筒外部的第二流体管线中的流体流动，从而在第一和第二流体管线和量筒周围建立闭合回路。 为了启动测试运行，流过第二流体管线的流体被阻塞以操作测量活塞。 与此同时，测量活塞从端对端被驱动通过量筒，以执行测试运行。

公开(公告)号：US5052211A

公开(公告)日：1991-10-01

申请号：US453142

申请日：1989-12-12

申请人： Gary D. Cohrs ,  Edward E. Francisco, Jr.

发明人： Gary D. Cohrs ,  Edward E. Francisco, Jr.

IPC分类号： G01F25/00

CPC分类号： G01F25/0015

摘要： A fluid flowmeter prover uses a measuring cylinder in series with a flowmeter to calibrate the flow meter. The cylinder has a piston which travels in synchronism with the fluid, the flow rate of which is to be measured. At the downstream end of the cylinder, a poppet valve connected to and within the piston opens to allow the fluid to pass through the piston. The poppet valve has a valve rod connected to a first coupling. A second coupling engages the first coupling and through a motor draws the valve and piston to the upstream end of the cylinder where they disengage, releasing the valve and allowing it to close for another run. The cycle repeats when the second coupling is driven down to reengage the first coupling.

摘要翻译： 流体流量计证明器使用与流量计串联的量筒来校准流量计。 气缸具有与流体同步地行进的活塞，其流量被测量。 在气缸的下游端，连接到活塞内部和内部的提升阀打开以允许流体通过活塞。 提升阀具有连接到第一联接器的阀杆。 第二联接器接合第一联接器并且通过马达将阀和活塞拉到汽缸的上游端，在那里它们脱开，释放阀并允许其关闭用于另一个运行。 当第二耦合被驱动下来以重新接合第一耦合时，循环重复。

公开(公告)号：USRE31432E

公开(公告)日：1983-11-01

申请号：US316992

申请日：1981-11-02

申请人： Edward E. Francisco, Jr.

发明人： Edward E. Francisco, Jr.

IPC分类号： G01F25/00

CPC分类号： G01F25/0015

摘要： A measuring cylinder has at its ends an inlet and an outlet connected in a fluid system in series with a flowmeter. A measuring piston is adapted to travel through the measuring cylinder as a fluid barrier. A poppet valve on the inlet side of the measuring piston is adapted to seal a passage through the measuring piston when closed so the measuring piston travels through the measuring cylinder as a fluid barrier, and to permit fluid flow through the passage when open. A retracting piston is adapted to travel through a retracting cylinder having a smaller cross-sectional area than the measuring cylinder as a fluid barrier. A rod is connected between the retracting cylinder and the poppet valve to open and close the poppet valve as the retracting piston moves relative to the measuring piston. The movement of the retracting piston through the retracting cylinder is controlled so as to hold the measuring piston at an upstream position of the measuring cylinder prior to a test run, to release the measuring piston when a test run is initiated, and to return the measuring cylinder to the upstream position after the test run. In one embodiment, the movement of the retracting cylinder is controlled during the test run to maintain a constant difference in pressure between the upstream and downstream sides of the measuring piston. .Iadd.