子分类：
- G01P5/001： .{全流域流动测量,例如在整个区域内同时测定流动速度及方向,流动可视化}
- G01P5/003： .{通过测量流体在障碍物前的水平面}
- G01P5/005： .{通过应用注入流体的射流}
- G01P5/008： .{通过应用电解液加入流体的方法}
- G01P5/01： .利用涡流式流量计
- G01P5/02： .通过测量流体作用于固体上的力,例如风速表
- G01P5/08： .通过测量受流量直接影响的电变量的变化,例如应用机-电效应的
- G01P5/10： .通过测量热变量
- G01P5/14： .通过测量流体中的压差
- G01P5/18： .通过测量流体移动一定距离所需的时间
- G01P5/24： .通过测量对探测声波流动的直接影响
- G01P5/26： .通过测量液体流动对探测光波特性的直接影响
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 241 | Flow velocity measuring unit | US09114039 | 1998-07-10 | US06212951B1 | 2001-04-10 | Alexandr Mikhailovich Derevyagin |
| A Doppler flow velocity measuring unit wherein an optical unit including a laser and a photodetector is removably mounted on a pipeline is disclosed. The optical unit is attached to a pipe that is affixed to the pipeline at right angles to the flow in the pipeline. The pipe includes a shutoff valve that closes the pipe, permitting the optical unit to be removed from the pipeline. | ||||||
| 242 | Device for positioning a measuring probe | US09355051 | 1999-09-20 | US06182521B2 | 2001-02-06 | Leander Kerner; Hans-Dieter Volz |
| The invention concerns a device for the precise positioning of a measurement probe along a probe axis A and which can rotate around this axis. By the coaxial arrangement of adjustment units for rotating and longitudinal displacement of the probe as well as by an rpm step-down gear arranged therebetween, a compact construction of the device is made possible and a coaxially situated passage is kept free, through which the probe shaft can be inserted and removed. | ||||||
| 243 | Neural network based method for estimating helicopter low airspeed | US955970 | 1997-10-22 | US5890101A | 1999-03-30 | Carl G. Schaefer, Jr.; Kelly M. McCool; David J. Haas |
| The invention is directed to a system, utilizing a neural network, for estimating helicopter airspeed in the low airspeed flight range of below about 50 knots using only fixed system parameters as inputs to the neural network. The method includes the steps of: (a) defining input parameters derivable from variable state parameters generated during flight of the helicopter and measurable in a nonrotating reference frame associated with the helicopter; (b) determining the input parameters and a corresponding helicopter airspeed at a plurality of flight conditions representing a predetermined low airspeed flight domain of the helicopter; (c) establishing a learned relationship between the determined input parameters and the corresponding helicopter airspeed wherein the relationship is represented by at least one nonlinear equation; (d) storing the at least one nonlinear equation in a memory onboard the helicopter; (e) measuring real time values of the variable state parameters during low airspeed flight of the helicopter; (f) calculating real time values of the input parameters; (g) storing the real time values of the input parameters in the memory; (h) processing the real time values of the input parameters in accordance with the at least one nonlinear equation to determine real time airspeed; and (i) displaying the real time airspeed. | ||||||
| 244 | Method and apparatus for determining the airspeed of rotary wing aircraft | US711927 | 1996-09-11 | US5750891A | 1998-05-12 | Alan Brocklehurst |
| A method and apparatus for determining the airspeed of a rotary wing aircraft having a sustaining rotor with a plurality of radially extending rotor blades for rotation about a substantially vertical axis comprises the steps of measuring an airflow sideslip angle established during rotation of each rotor blade by the vector of a radial flow component due to the relative wind vector and the rotational velocity perpendicular to a blade feathering axis, producing a signal representative of the sideslip angle, comparing the signal in a processor containing information on a known relationship between the sideslip angle and airspeed, providing an output signal representative of the airspeed and wind direction to a display which may display both the airspeed and wind direction. | ||||||
| 245 | System and method for monitoring wind characteristics | US419031 | 1995-03-10 | US5646343A | 1997-07-08 | Declan Nigel Pritchard |
| A system for investigating the variation of one or more wind characteristics within a volume over a given area comprises a plurality of detectors which output a data signal which is indicative of the value of a wind characteristic, the outputs of all the detectors deployed in the area are relayed to a central receiving unit which may include a recorder for recording the relayed data and may additionally provide a computer and a VDU for providing a real-time display of the data. Preferably each detector comprises a balloon or kite-like device each of which is tethered to one of a plurality of anchor points distributed around the area. | ||||||
| 246 | Thermal anemometer airstream turbulent energy detector | US327968 | 1994-10-24 | US5639964A | 1997-06-17 | Robert S. Djorup |
| A turbulence sensor whose signal output is processed to substantially reduce accumulated turbulence signal bandwidth and provide a permanent stored record in which maximum information content is preserved while a minimum of data samples are recorded. Both turbulence energy and turbulence intensity sensors are disclosed. Aircraft mounting of multiple sensors together with correlation monitoring relating to airframe structural integrity prediction is disclosed. A turbulence energy sensor for ground monitoring of conditions such as wake vortex and wind shear turbulence as well as cyclonic system detection in remote geographic areas is also disclosed. An aircraft turbulence sensor, combining a fast response thermal anemometer airspeed transducer together with a ducted thermal anemometer direction transducer sensing angle-of-attack is disclosed. | ||||||
| 247 | Marine velocity detection device with channel to wash out debris | US294476 | 1994-08-19 | US5583289A | 1996-12-10 | Ronald E. Wiggerman; Craig Gates; Dale L. Habbley; Edward J. Hollowed |
| An apparatus, according to the invention, detects the relative speed of the apparatus with respect to the fluid into which it extends. The apparatus includes a streamlined body portion having an upper end, a lower end, a front edge, a back edge, and a pair of sides. A conduit extends through the body portion and is exposed to the fluid at an orifice located beneath the fluid line. The other end of the conduit is coupled to a pressure transducer which produces an output proportional to the pressure acting on the orifice and thus proportional to the speed of the apparatus relative to the fluid. This apparatus can be connected to an appropriate speedometer and is particularly useful for measuring the speed of a watercraft to which the apparatus is mounted. | ||||||
| 248 | Mooring system for the stationary positioning of measurement devices in currents of water | US103840 | 1993-08-09 | US5364297A | 1994-11-15 | Gerd Rohardt |
| A mooring system for the stationary positioning of measurement devices in currents of water typically has a mooring cable which is anchored to the bottom of the body of water and at least one buoyant device for holding the mooring cable vertically in the water. By combining the protective jacket of the buoyant device and the cable guide of the buoyant device into a common molding, no additional assembly parts are needed. The buoyant devices can also be directly attached to the mooring cable by appropriately protected threading slots. | ||||||
| 249 | Low-level wind-shear alert system | US842009 | 1992-02-25 | US5315297A | 1994-05-24 | Lawrence B. Cornman |
| The apparatus of the present invention improved low-level wind shear alert system that provides an improved method of identifying the presence and locus of wind shear in a predefined area. This system enhances the operational effectiveness of the existing LLWAS system by mapping the two-dimensional wind velocity, measured at a number of locations, to a geographical indication of wind shear events. This system can also integrate data and processed information received from a plurality of sources, such as anemometers and Doppler radar systems, to produce low-level wind shear alerts of significantly improved accuracy over those of prior systems. In particular, the apparatus of the present invention makes use of the data and processed information produced by the existing Low-Level Wind Shear Alert System as well as that produced by the Terminal Doppler Weather Radar to precisely identify the locus and magnitude of low-level wind shear events within a predetermined area. This resultant geographical indication is displayed in color-graphic form to the air traffic control personnel and can also be transmitted via a telemetry link to aircraft in the vicinity of the airport for display therein. | ||||||
| 250 | Sensor and method for ullage level and flow detection | US707742 | 1991-05-30 | USRE34501E | 1994-01-11 | Buford R. Jean; Gary L. Warren; Richard W. Newton; Billy V. Clark |
| A device is provided for detecting the ullage level and flow in a vessel by detecting the presence of a solid or liquid material in proximity to a microwave detector. The device may be mounted to the side of the vessel or suspended inside the vessel so as to bring the microwave sensor into proximity with the surface of the contents of the vessel. A microwave bridge circuit may be used to detect a change in either the amplitude or phase of a signal reflected by the material within the vessel compared to a reference signal tuned to either the presence or absence of the anticipated solid or liquid material. In one embodiment, the reflected material signal is compared to the signal from a sample chamber containing the material to be detected. The device can reliably detect the level of multiple interfaces for various materials having distinct electric or magnetic properties. | ||||||
| 251 | Low-level wind-shear alert system | US718345 | 1991-06-19 | US5257021A | 1993-10-26 | Lawrence B. Cornman |
| The apparatus of the present invention improved low-level wind shear alert system that provides an improved method of identifying the presence and locus of wind shear in a predefined area. This system enhances the operational effectiveness of the existing LLWAS system by mapping the two-dimensional wind velocity, measured at a number of locations, to a geographical indication of wind shear events. This system can also integrate data and processed information received from a plurality of sources, such as anemometers and Doppler radar systems, to produce low-level wind shear alerts of significantly improved accuracy over those of prior systems. In particular, the apparatus of the present invention makes use of the data and processed information produced by the existing Low-Level Wind Shear Alert System as well as that produced by the Terminal Doppler Weather Radar to precisely identify the locus and magnitude of low-level wind shear events within a predetermined area. This resultant geographical indication is displayed in color-graphic form to the air traffic control personnel and can also be transmitted via a telemetry link to aircraft in the vicinity of the airport for display therein. | ||||||
| 252 | Low-level wind-shear alert system | US841979 | 1992-02-25 | US5208587A | 1993-05-04 | Lawrence B. Cornman |
| The apparatus of the present invention improved low-level wind shear alert system that provides an improved method of identifying the presence and locus of wind shear in a predefined area. This system enhances the operational effectiveness of the existing LLWAS system by mapping the two-dimensional wind velocity, measured at a number of locations, to a geographical indication of wind shear events. This system can also integrate data and processed information received from a plurality of sources, such as anemometers and Doppler radar systems, to produce low-level wind shear alerts of significantly improved accuracy over those of prior systems. In particular, the apparatus of the present invention makes use of the data and processed information produced by the existing Low-Level Wind Shear Alert System as well as that produced by the Terminal Doppler Weather Radar to precisely identify the locus and magnitude of low-level wind shear events within a predetermined area. This resultant geographical indication is displayed in color-graphic form to the air traffic control personnel and can also be transmitted via a telemetry link to aircraft in the vicinity of the airport for display therein. | ||||||
| 253 | Particle sensor for stream bed | US674606 | 1991-03-25 | US5207090A | 1993-05-04 | John P. Downing, Jr. |
| A sensor for detecting particle flux in a stream has a hollow armored housing enclosing a vibration transducer coupled to the housing for detecting particles impinging on the housing. Also enclosed in the housing is a data logging and control unit for recording particle flux for later retrieval. An ultrasonic acoustic beacon for signalling the condition of the sensor and for indicating the position of the sensor in the event of displacement is also mounted on the sensor. Additionally a brightly colored long buoyant pennant is attached for enabling visual relocation of a displaced sensor. | ||||||
| 254 | Apparatus for optical remote wind sensing | US230324 | 1988-08-09 | US5123730A | 1992-06-23 | J. Fred Holmes; Farzin Amzajerdian; John M. Hunt |
| The apparatus of the present invention includes a light source for producing a coherent beam of light. A beam splitter is provided for splitting the beam of light into a first, transmitted beam segment and a second, local oscillator beam. A mechanism is provided for frequency shifting the frequency of one or both beam segments and for directing the first beam segment to a target. A remote target for scattering the first beam is provided. A mechanism is provided for combining the scattered first beam segment returning from the target and the second beam segment into a combined beam, and detecting the combined beam. A detector is operative to generate a signal indicative of the crosswind along the path of the directed first beam segment. A mechanism for determining the wind speed normal to the path from the generated signal is also provided. | ||||||
| 255 | Rapid flow measurement using an NMR imaging system | US564513 | 1990-08-09 | US5101156A | 1992-03-31 | Norbert J. Pelc |
| An NMR system measures the velocity of flowing spins in the presence of stationary spins by performing three separate measurement cycles. The first cycle is a reference, the second cycle includes a magnetic field gradient having an incremental, flow sensitizing first moment .DELTA.M.sub.1, and a third measurement cycle includes a magnetic field gradient having an incremental flow sensitizing first moment -.DELTA.M.sub.1. The resulting NMR signals are processed to produce a velocity measurement. | ||||||
| 256 | Multi-colored layers for visualizing aerodynamic flow effects | US621144 | 1990-12-03 | US5070729A | 1991-12-10 | Ronald N. Jensen |
| A method is provided for visualizing aerodynamic flow effects on a test surface. First, discrete quantities of a sublimating chemical such as naphthalene are distinctively colored via appropriate dyes or paints. Next, a uniform layer of the sublimating chemical having a particular color is applied to the test surface. This layer is covered with a second uniform layer of a different colored sublimating chemical, and so on until a composite of multi-colored layers is formed having a discrete thickness. Friction caused by an airflow results in the distinctly colored layers being removed in proportion to such aerodynamic flow characteristics as velocity and temperature, resulting in a multi-colored portrait which approximates the airflow on the underlying test surface. | ||||||
| 257 | Speed measuring device for a helicopter | US751553 | 1985-07-03 | US4648269A | 1987-03-10 | Bernard Durand |
| The invention relates to the technical field of pilotage aids for helicopters. In a speed measuring device having two measuring devices for longitudinal speed and lateral speed of the helicopter, each measuring device comprises a single sensor (9a, 9b) for sensing the position of the cyclic rotor pitch control along the axis concerned, and for sensing the acceleration component along the same axis. Each measuring device further includes a computer to provide the air speed components of the helicopter. Applications include flight testing, and the construction of firing computers and flight computers. | ||||||
| 258 | Apparatus for determining the groundspeed rate of an aircraft | US457813 | 1983-01-13 | US4646243A | 1987-02-24 | Frederick G. Graupp; Francis J. van Leynseele |
| Aircraft gyro (20, 22) signals .theta. and .phi., representative of pitch and roll attitude, respectively, and accelerometer (24, 26, 28) signals a.sub.x, a.sub.y, a.sub.z, representative of longitudinal, lateral, and normal acceleration, respectively, are processed (30, 32, 34, 36, 38, 40) to produce signals a.sub.GSLO, a.sub.GSLA, and a.sub.GSN, representative of the longitudinal, lateral, and normal groundspeed rate components, respectively. The component signals are summed (50) to produce a signal representative of total aircraft groundspeed rate. | ||||||
| 259 | Aircraft instruments | US440159 | 1982-11-08 | US4507959A | 1985-04-02 | David J. Brazener |
| A Mach airspeed indicator instrument has a pointer that is rotatable around an airspeed scale and a Mach scale, the Mach scale itself being rotated in response to altitude change. A marker can be rotated around the scales via a cam that is manually rotated by an external knob. Rotation of the Mach scale is coupled via two vertical links and a lateral arm to rotate a gear ring which carries a peg. When the gear ring reaches a certain position the peg contacts and displaces a similar peg which rotates the marker with the Mach scale. The Mach value at which this occurs is adjusted manually from outside the instrument by a knob. Twisting the knob causes a vertical displacement of a mounting bracket on which the lateral arm is pivotted. The lateral arm is fixed at the end coupled with the Mach scale so that it rotates about that end causing rotation of the gear ring without affecting the Mach scale. | ||||||
| 260 | Marine speed log | US378178 | 1982-05-14 | US4472966A | 1984-09-25 | Alex C. Dumestre, III |
| A marine speed log for providing an indication of the relative velocity of a vessel through water and an indication of the forward or reverse direction of travel. An output indication of total distance travelled can also be provided. The speed log is operable in both salt and fresh water without any change in calibration and incorporates a transducer having an air core. The speed log provides high sensitivity and high rejection of noise. | ||||||
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