| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | MASS-VOLUME VORTEX FLOWMETER | EP91904022.0 | 1991-01-15 | EP0464195A1 | 1992-01-08 | LEW, Hyok Sang |
| Un débitmètre comporte un corps camus (102) produisant un vortex, disposé dans le passage d'écoulement (106), un élément plan (103) disposé immédiatement en amont du corps camus (102), comprenant une pluralité d'orifice de pression totale émergent par le bord avant de l'élément plan (103), ainsi qu'une pluralité d'orifices de pression statique émergent par les faces latérales de l'élément plan (103), et un dispositif de détection de vortex comprenant un élément plan (104) ainsi qu'un ou deux transducteurs (111 et 112), ledit débitmètre déterminant les vitesses d'écoulement massique et volumique du fluide ainsi que la densité de ce dernier, à partir de la pression dynamique déterminée à l'aide de la différence entre les pressions totale et statique et la vitesse du fluide déterminée à partir de la fréquence de déversement du vortex. | ||||||
| 22 | Wirbelströmungsmesser | EP86116478.8 | 1986-11-27 | EP0229933B1 | 1991-04-24 | Herzog, Michael |
| 23 | Wirbelströmungsmesser | EP86116478.8 | 1986-11-27 | EP0229933A3 | 1989-05-10 | Herzog, Michael |
Ein Wirbelströmungsmesser zur Messung der Strömungsgeschwindigkeit eines Strömungsmediums in einer Rohrleitung enthält einen im Strömungskanal der Rohrleitung angeordneten Staukörper. An dem Staukörper entstehen Karmänsche Wirbel, deren Folgefrequenz für die zu messende Strömungsgeschwindigkeit kennzeichnend ist. In dem Staukörper ist ein Hohlraum gebildet, der über Durchlässe mit dem Strömungskanal der Rohrleitung in Verbindung steht, und in dem Hohlraum ist ein kapazitiver Wirbelsensor angeordnet, der die von den Kärmänschen Wirbeln stammenden Wirbel-Druckschwankungen in Kapazitätsänderungen umwandelt. Der kapazitive Wirbelsensor enthält einen ersten Schwingkörper in Form einer Sensorhülse, die durch die Wirbel-Druckschwankungen auslenkbar ist, und einen in der Sensorhülse angeordneten Elektrodenhalter, der als zweiter Schwingkörper ausgebildet ist, der jedoch von den Wirbel-Druckschwankungen entkoppelt ist. Der Elektrodenhalter trägt wenigstens eine Kondensatorelektrode, die mit einem gegenüberliegenden Elektrodenabschnitt der Sensorhülse eine Meßkapazität bildet, die sich bei den durch Wirbel-Druckschwankungen relativ zum Elektrodenhalter verursachten Auslenkungen der Sensorhülse ändert. Dagegen verursachen Vibrationen, die durch äußere Störeinflüsse erzeugt werden, gleichartige Auslenkungen der beiden Schwingkörper, die somit keine Kapazitätsänlerungen ergeben. Der kapazitive Wirbelsensor ist somit unempfindlich gegenüber äußeren Vibrationen und anderen Störeinflüssen. |
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| 24 | Vorrichtung zur Bestimmung der Durchflussrichtung | EP87103423.7 | 1987-03-10 | EP0266480A1 | 1988-05-11 | Porth, Wolfgang; Weibler, Wolfgang, Dr. |
Um das Auftreten einer Rückströmung in einem mit bekanntem Massenstrom strömenden rasch pulsierenden Fluidstrom insbesondere im Ansaugkanal (10) eines Verbrennungsmotors zu erkennen, wird eine Vorrichtung zur Bestimmung der Durchflußrichtung mit einem turbulenzempfindlichen Sensorelement (12) vorgeschlagen, das zwischen einem Strömungsgleichrichter (32) und einem Wirbelelement (16) angeordnet ist, wobei das Sensorelement (12) je nach Strömungsrichtung laminarer oder aber turbulenter Strömung ausgesetzt ist. |
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| 25 | FLOWFIELD SENSORS FOR MONITORING LIQUID FLOW | US14846983 | 2015-09-07 | US20170066660A1 | 2017-03-09 | Julia S. Baldauf; Darcy James Beurle; Matthew Downton; Stephen M. Moore; Christine Schieber; George Yiapanis |
| Data relating to fluid dynamics is obtained using a flow field sensor that measures acceleration and angular velocity of the sensor on three axes. Ballast control allows the sensor to obtain neutral buoyancy within the fluid. The sensor is effective in opaque fluids and closed containers as data is stored in a removable memory. Froth flotation systems are among the applications for the sensor. The small size, the geometry, and the center of mass of the sensor allow it to follow the flow field in a vessel without material disruption of the flow field or weight-induced angular displacement. | ||||||
| 26 | Resonant flow sensor and uses and production methods for the same | US12737376 | 2009-07-27 | US08733162B2 | 2014-05-27 | Norman Wood; Karin Bauer; Xaver Riedl; Roland Wagner |
| The invention relates to a flow state sensor (10) for detecting a flow state at a body (16) that may be impinged on by a flow (12). A flow state sensor (10) that is of a simple construction and that is simple to evaluate is characterized in accordance with the invention by at least one frequency detecting device (20) for detecting at least one predefined frequency characteristic of the flow state. The frequency detecting device (20) has at least one oscillation element (22; 22a, 22b, 22c) excitable to resonant oscillatory movement (30) by a flow (12) and having a resonant frequency or natural frequency adapted to the predefined frequency characteristic, especially corresponding to the predefined frequency characteristic. Uses of the flow state sensor (10) in a flow measuring device (62) and in a flow measuring method, and an advantageous production method for the flow state sensor (10) are also proposed. | ||||||
| 27 | Extreme wind velocity measurement system | US09408654 | 1999-09-14 | US06370949B1 | 2002-04-16 | Jan A. Zysko; Stanley O. Starr |
| A wind velocity measurement system employs two different principles of physics to measure wind speed: (1) the aerodynamic force imparted to a low profile, rigidly mounted cylindrical rod, and (2) the vibrating frequency of the rod as vortices are shed from the rod's cylindrical surface. A set of strain gages is used as a common sensor for both measurements, and these provide force measurements imparted by the wind on the rod. The signals generated by the strain gages are fed to processing circuitry that calculates the wind speed and direction from the signals. The force measurement is proportional to the square of the wind speed. Since it is a vector quantity, it can also be used to derive wind direction. The vortex shedding frequency is a scalar quantity and is linearly proportional to wind speed. This frequency can be calculated by analyzing the force measurements generated by the strain gages over time. Both of the wind velocity calculations can be advantageously used by the processing circuitry to generate an accurate wind velocity reading. | ||||||
| 28 | Broad-range, multi-directional aircraft airspeed measuring system | US56328 | 1998-04-07 | US06101429A | 2000-08-08 | Garimella Ramakrishna Sarma; Sivaramakrishman M. Mangalam |
| A broad-range, multi-directional aircraft airspeed measuring system is provided. The airspeed measuring system has multiple vortex generating probes located within a venturi section. At least one rearward facing probe and one forward facing probe are included. Additional probes can be added to extend the high speed range of the airspeed indicator. A splitter plate or plates separate flow channels from each other to provide a separate flow channel for each vortex probe. Each vortex probe has a hot film sensor and anemometer. | ||||||
| 29 | Mass-volume vortex flowmeter | US642664 | 1991-01-17 | US5152181A | 1992-10-06 | Hyok S. Lew |
| A flowmeter has a vortex generating bluff body (102) disposed across the flow passage (106), a planar member (103) disposed immediate upstream of the bluff body (102) including a plurality of total pressure ports emerging through the leading edge of the planar member (103) and a plurality of static pressure ports emerging through the side faces of the planar member (103), and a vortex sensing device including a planar member (104) and one or two transducers (111 and 112), which flowmeter determines the mass and volume flow rates of the fluid and the density of the fluid from the dynamic pressure determined from the difference between the total and static pressures and the fluid velocity determined from the vortex shedding frequency. | ||||||
| 30 | Flow measuring apparatus | US872905 | 1986-06-11 | US4756196A | 1988-07-12 | Rolf Schmitt |
| An apparatus for measuring the flow rate of fluid media has a rod-like interfering body rigidly arranged in the flow and which has a cylindrical flow-against surface on which periodically separating eddies form, as well as a device with a sensor for recording the eddy separating frequency which is dependent on the flow rate. In order to obtain a proportional dependence between the flow and separating frequency over a wide Reynolds number range in the case of a low inherent flow resistance, the interfering body is symmetrically bent downstream and to either side from its top. To avoid interactions between the two vortex paths which form, a diverting surface is positioned behind the interfering body in the plane thereof. | ||||||
| 31 | Fish locator probe | US610710 | 1984-05-16 | US4649744A | 1987-03-17 | Jim Cotillier |
| A probe generally rocket-like in shape includes a forward leading nose section containing a radio transmitter with an antenna permanently attached thereto which is fixed to a central housing section possessing a generally cross-sectionally square bore followed by a trailing finned section continuing the bore. A motor assembly including an electric motor having opposed shafting (one end of the shaft defines a cutting tool and the opposite end of the shaft defines a plurality of threads) is slideably disposed in a watertight chamber. The motor assembly, retained in a first position by the engagement of the threaded shaft with the body, is biased toward a second position by a compression spring. A sensing array of position sensing switches senses deviations in the descent of the probe in the water. The motor rotates the shaft to disengage the shaft from body in response to the sensed deviations. If sufficient deviations over time occur, the threads of the shaft disengage from the body and the motor assembly moves to its second position, thereby shifting the center of gravity of the probe. The probe inverts, causing ballast to detach from the probe to make the probe buoyant. The transmitter emits a signal while the probe floats on the surface. The cutting tool on the opposite end of the shaft eventually pierces a plug, filling the chamber with water and scuttling the probe. If insufficient deviations occur, the probe sinks to the bottom and implodes. | ||||||
| 32 | Dual-body vortex-shedding flowmeter | US392669 | 1982-06-28 | US4445388A | 1984-05-01 | Peter J. Herzl; Warren O. Strohmeier |
| A vortex-shedding flowmeter for accurately measuring the flow rate of gases and liquid conducted through a flow tube provided with a dual-body shedder having a front section fixedly mounted across the tube, behind which is a pivotally mounted rear section separated from the front section by a gap configured to produce a fluidic feedback path so that a strong hydraulic interaction takes place between the sections and both actively contribute to the formation of periodic vortices which are alternately shed on either side of the shedder. The rear section is mounted on a pivot shaft extending along an axis normal to the flow axis of the tube, whereby the vortices which appear on either side of the rear section induce the rear section to oscillate. These oscillations are sensed to produce a signal representing the flow rate. | ||||||
| 33 | Vortex flowmeter | US375350 | 1982-05-05 | US4441372A | 1984-04-10 | Richard H. Barnard |
| An elongate body extends as a bar across a fluid flow passage and has a vortex shedding tapered head portion pointing upstream and a tail portion downstream of the head. The head has an axial length equal to or less than half the head width. The tail has a width less than head width throughout its length. A sensor is arranged downstream of the head. For example, the sensor may be in the tail portion of the body such as to sense the vortices produced alternately on the side surfaces. The frequency output of the sensor is proportional to the relative speed between the elongate body and the fluid. The arrangement can be used as a fluid flowmeter or a ship's log. | ||||||
| 34 | Vortex flowmeter | US312494 | 1981-10-19 | US4416159A | 1983-11-22 | Roger J. Williamson; David N. Batchelder |
| A bluff body is placed in a fluid pipe with one flat face facing the oncoming fluid. Vortices are then generated and shed alternately from opposite edges of the body. This body is of a scalene triangle cross section, and in one version a hole extends transversely therethrough. A longitudinal hole intersects the first hole at right angles thereto. The vortices cause oscillations in the transverse hole. A light beam is provided in the longitudinal hole. The light beam is modulated as it crosses the path of the transverse hole. Hence by measuring the frequency at which the beam is modulated and by suitable calibration, one gets a good and reliable indication of fluid flow rate. In a second version the transverse hole is formed into a blind hole at the foot of which is an etalon (a Fabry-Perot interferometer). The effect of the fluid oscillations due to vortex generation influences the etalon so that its output is a measure of the fluid flow rate. | ||||||
| 35 | Stabilized vortex-shedding flowmeter | US103490 | 1979-12-14 | US4297898A | 1981-11-03 | Peter J. Herzl |
| A stabilized vortex-shedding flowmeter for accurately measuring the flow rate of a liquid or gas conducted through a flow tube. The meter includes a front obstacle transversely mounted across the tube with its longitudinal axis normal to the flow axis of the tube. Supported behind the front obstacle and spaced therefrom by a gap is a rear obstacle constituted by a pair of parallel beams symmetrically disposed with respect to the flow axis and lying in a plane normal thereto. In operation, as the incoming fluid stream is divided by and flows past the front obstacle, a stagnant zone is created in the gap. This zone is initially aligned with the flow axis; but as vortices are successively detached from the front obstacle and appear alternately on either side of the gap, the low pressure produced by each vortex act to draw the stagnant zone in front of the beam adjacent thereto, the fluid then going around and past the other beam and imposing a drag force thereon. Since the vortices alternate, the drag forces imposed on the beams alternate at a rate proportional to the flow rate of the fluid. A transducer system is provided to sense the alternating activity in the tube and to generate a signal whose frequency is linearly related to the flow rate. | ||||||
| 36 | Vortex flow meter | US959323 | 1978-11-09 | US4201084A | 1980-05-06 | Ichizo Ito; Toshio Aga; Tetsuo Ando |
| A vortex flow meter produces Karman's vortices in a fluid to be measured and a piezoelectric sensor develops a vortex signal therefrom which is proportional to the flow velocity of the fluid. The output signal of the sensor is applied to a charge amplifier and a low pass filter coupled thereto which functions to a predetermined signal amplitude for limiting low and high frequency noise and stabilizing the gain of the system within the vortex frequency measuring range. The output signal is converted by a logic circuit to a pulse signal of vortex frequency and then converted to a DC signal for transmission to an indicator or a receiver. | ||||||
| 37 | Fluid flow measuring apparatus | US933044 | 1978-08-10 | US4173143A | 1979-11-06 | Roy Venton-Walters |
| A fluid flow meter, for example for measuring the velocity of an air flow, comprises a flow duct having a transverse vortex-shedding bar, the ultrasonic or other detector means for sensing the shedding of Karman vortices from the bar as the fluid flow passes the bar, and for converting the alternating output signal of the detector means into a signal of square-wave form of operating a digital counter, and one or more additional cross-members extending across the flow duct downstream of the flow section where the vortex-sensing means operates, the additional cross-member extending transversely to the vortex-shedding bar and being of cylindrical or aerofoil cross-section, or of rectangular or other cross-section having a flat upstream face parallel to the bar. The provision of the additional cross-member is found to improve the regularity of the vortex-shedding from the bar and hence the accuracy of the meter reading. | ||||||
| 38 | Vorticity probe utilizing strain measurements | US871902 | 1978-01-24 | US4145921A | 1979-03-27 | Ron F. Blackwelder |
| A probe with no-moving parts for measuring the vorticity of a flowing fluid. The probe consists of an elongated, cylindrical stem member having one end fixedly mounted, means for imparting to the other end of the stem member a torque which is proportional to the vorticity of a flowing fluid, and means for measuring the imparted torque. In a specific embodiment the torque imparting means consists of fins attached to the other end of the stem member and the measuring means consists of strain gauges oppositely wound around the circumference of the stem member. The strain gauge outputs indicate the torque being applied to the stem, and therefore provide signals proportional to the vorticity of the flowing fluid. | ||||||
| 39 | Vortex-type flowmeter | US41480073 | 1973-11-12 | US3878715A | 1975-04-22 | KOBAYASHI TAMOTSU |
| A flowmeter having no moving parts and including a vortex shedder mounted transversely in a conduit forming a passage for the fluid being measured. The shedder is provided with an axially-extending gap perpendicular to the direction of fluid flow in the conduit, and means to establish a magnetic field in the gap whose lines of flux are parallel to the direction of flow. Fluid oscillations produced in the gap as a result of Karman vortices are detected on the induction principle by a pair of electrodes mounted on said shedder at axially-spaced positions within said gap. The frequency of the signal developed at the electrodes is proportional to the flow rate or flow velocity and is undisturbed by common mode flow noise.
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| 40 | Current meter or flow meter | US3691830D | 1970-07-07 | US3691830A | 1972-09-19 | TOMOTA MIYAJI; ISHIKAWA YUTAKA; YAMASAKI HIROO; KURITA YOSHIO |
| A flow meter in which a cylindrical device is immersed in the fluid stream and produces Karman vortices and in which tubes pass through the cylindrical device and supply a quantity of fluid which varies as a function of the pressure on the surface of the cylindrical device and wherein a velocity measuring means is mounted in one of the tubes to detect the flow through the tube.
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