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WO/1991/006244A1 |
The invention relates to a system and to a method for the measurement and presentation of flow movements in a fluid, particularly for determining blood perfusion in the superficial blood vessels of a body organ. The system includes a las...
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WO/1991/003739A1 |
Device for the measurement of flow velocity in channels or road tunnels, where a sensor (11) is used to register the differential pressure. This comprises a plate-shaped organ (12) that is located at a right angle to the flow direction i...
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WO/1991/002224A1 |
The silicon sensing element of a mass airflow sensor is shielded from direct impact by large dust particles by means of a plastic deflector that is disposed in spaced upstream relationship to the entrance of a by-pass venturi containing ...
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WO/1991/002218A1 |
A dynamic fluid flow sensing system measures relative fluid velocity with respect to a reference member. The system includes a sensor housing (10) supported from the reference member such that the sensor housing is exposed to fluid flowi...
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WO/1990/015334A1 |
A method for determining wind velocity in a region in which a turn is being executed by an aircraft uses a positional detection system to obtain positional data pertaining to the aircraft during execution of the turn (figure 1a), calcula...
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WO/1990/013036A1 |
Young's fringes are produced from a double exposure image of particles in a flowing fluid by passing laser light (33) through the film and projecting the light onto a screen (35). A video camera (36) receives the image from the screen an...
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WO/1990/011494A1 |
The process and device are designed, in particular, for the spectral analysis of signals furnished by medical Doppler velocimeters Consecutive sections of the sample signal are modelled using a high order self-regressing process, in the ...
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WO/1990/011528A1 |
The process and device can be used, in particular, for extracting certain parameters from a Doppler signal in ultrasonic medical imaging. The device uses, as an imput parameter, for the calculation of the average frequency the correlatio...
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WO/1990/010876A1 |
The present invention is an improvement on a system for double-pulsed particle velocimetry in which small scattering particles (20) are illuminated by two short pulses of laser light and then images are recorded photographically (18) to ...
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WO/1990/010492A1 |
A water separating device (10, 460D) for a pressure measurement such as static, pitot measurement system provides a passageway (82, 420A, 436A, 460A) having a portion formed as a plurality of ports (41, 420B, 436B, 460E) therethrough suc...
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WO/1990/009567A1 |
A flowmeter is located in thermal contact with a fluid the flow rate of which is to be measured. A heater is placed in thermal contact with a body of the meter, and a first temperature sensor measures the temperature of the body. A secon...
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WO/1990/009597A1 |
An air speed measuring device includes an air speed sensor (110) and signal processing electronics (111) to measure air speed under control of a microprocessor (116) and a speech circuit (112) to provide an annunciation signal which is a...
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WO/1990/005310A2 |
Particle velocity is determined optically through the use of crossed interference fringe patterns. The fringe patterns are produced by passing laser beams of distinct wavelength along a common optical fibre (30) and through two crossed d...
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WO/1990/004946A1 |
This invention is directed to obtain an ultrasonic diagnostic apparatus including a CFM system which can easily change algorithms for calculating a flow rate, and the like. The ultrasonic diagnostic apparatus of the present invention inc...
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WO/1990/005283A1 |
In a method for measuring the mass flow (M) of a fluid flowing through a pipe having a cross-sectional area (A), the sound velocity (c2) in the fluid is determined as well as the flow velocity (v) of the fluid by sing-around technique. F...
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WO/1990/003650A1 |
Device comprising a substrate and a metallized sensor/heater (10) element having a temperature coefficient of resistance of at least 2000 parts per million. Methods of fabricating the devices are also disclosed.
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WO/1990/002099A1 |
In a process and device for measuring a flow rate, the beam preferably emitted by a semiconductor laser (4) is split in the visible or infra-red range by means of a collimating lens system (5) and a twin hole diaphragm (6) connected down...
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WO/1990/001688A1 |
A device for detecting convective states occurring on wind tunnel models (2) in current boundary layers, in particular at cryogenic temperatures, has at least one camera (3), which scans the model from the outside, thereby sensing the te...
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WO/1990/001146A1 |
An asymmetrical displacement flowmeter comprises a streamlined body or assembly (1) which floats or is submerged in liquid (3) and is subject to frictional and dynamic pressure forces caused by liquid flow and tilts about axis (9) near t...
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WO/1989/012809A1 |
A quad disk static pressure probe apparatus (10) including: a hollow stem member (15) having a plurality of static pressure ports (16) disposed on its periphery; an apertured collar unit (14) surrounding the stem member (15) and being in...
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WO/1989/012216A1 |
Apparatus, especially for detecting leakage or unintended consumption in pipe systems, of a type, the mode of operation of which is based on heat transmission. The design of the apparatus is such that its use does not necessitate intrusi...
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WO/1989/011083A1 |
A flowmeter comprising a thermocouple and a current source for causing a temperature difference between the two junctions (24, 25) of the thermocouple. The thermocouple is connected to the current source (37) through a switch (36), a con...
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WO/1989/010567A1 |
A transducer for acceleration measurement is fabricated from a silicon slice and comprises four filaments (3, 4, 5 and 6) which interconnect a central support (1) with an inertial mass (2). The filaments vibrate in a common plane, their ...
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WO/1989/009955A1 |
A wind shear recovery system (10) for an aircraft utilizes inertially derived pitch information to provide the pilot with information (12) defining the optimum pitch angle for maximum climb during a wind shear condition. The system (10) ...
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WO/1989/007242A1 |
A circuit arrangement comprises a flow probe actuated by a bridge circuit and a device for monitoring the bridge balance which controls a trigger circuit capable of being supplied by an oscillator; the trigger circuit controls a switch d...
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WO/1989/005968A1 |
A silicon-based sensor (10) includes a substrate (20), a sensor element (12), and a protective diaphragm (22a) mounting and covering the sensor element (12). The diaphragm (22a) is a silicon layer (22) which, in a preferred embodiment, i...
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WO/1989/005963A1 |
A mass airflow sensor is fabricated on a semiconductor substrate (18) and includes a dielectric diaphragm (1), p-etch-stopped silicon rim (2), thin-film heating (3) and temperature sensing elements (4-7), and tapered chip edges (18). The...
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WO/1989/003534A1 |
In the process, the direction of motion of an electrically conducting object (damping member) is determined using an inductive proximity detector comprising a dampable L.C. oscillating circuit and an evaluation circuit which measures the...
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WO/1989/003512A1 |
A thermal effect sensing device (10) comprises a semiconductor substrate (15) supporting an insulating layer (14) which has a thin film of platinum (12, 13, 16, 21) deposited on it. Holes (17, 20) are etched through the semiconductor sub...
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WO/1989/002061A1 |
An air data sensor comprises a shaft probe (15) having a sharp edge orifice pitot port (24), and a tapered leading end (21) which blends into the main barrel portion (20) of the probe (15) a short distance downstream from the pitot port ...
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WO/1989/001132A1 |
An apparatus for measuring a characteristic of a fluid such as fluid velocity, humidity, pressure and the like. The apparatus comprises a sensor semiconductor means (17) to be disposed in said fluid. A heating means (25) is provided to s...
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WO/1988/010411A1 |
The present invention, the object of which is to provide a hot wire type air flow meter capable of accurately detecting an air suction rate of an internal combustion engine and stabilizing the flow distribution, relates to a hot wire typ...
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WO/1988/010457A2 |
In a system for producing an alarm signal on board an aircraft in the event of a minitornado, a minitornado alarm threshold (alpha + alphaw) is defined as a function of the actual incidence (alpha) of the aircraft, increased or decreased...
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WO/1988/009918A1 |
A measuring device for determination of the distribution and position of different material compositions, preferably liquids (7.1 and 7.2) and gases (7), with the aid of the thermodynamic properties of the material. Through the arrangeme...
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WO/1988/008959A1 |
The optical displacement sensor (10) modulates intensity of the light beam as a function of the physical displacement. The sensor includes a reflector (24) positioned in a path of the light beam between a light source (12) and a light de...
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WO/1988/008539A1 |
A transducer for arranging in a fluid particularly for the measurement of the flow velocity of a fluid in a pipe by transmitting/receiving sonic pulses, is designed as a cupshaped metal body (5), whose base (2) as membrane (3) is assigne...
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WO/1988/008540A1 |
A transducer device operating with ultrasound for the measurement of the flow velocity of a fluid in a pipe (1) comprising two transducers (2, 3) mounted on their respective sides of the pipe and directed obliquely in relation to the dir...
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WO/1988/007734A1 |
An instrument (10) is disclosed for an aircraft having a windshear warning system to vary the threshold alarm setting as a function of a thermodynamic property of the air and a function of local geographic and seasonal conditions. Specif...
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WO/1988/007179A1 |
A dynamic light scattering apparatus (10) comprises a laser (12) optically coupled to a light scattering sample (26) via a first monomode optical fibre (18) and a first lens (22). The lens (22) produces a beam waist (24) in the sample (2...
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WO/1988/005915A2 |
A through-hull speed sensor of the magnetized paddlewheel sensor type wherein a paddlewheel is rotatably supported in a cavity adjacent a magnetic sensing device which generates electrical pulses corresponding to paddlewheel speed as the...
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WO/1988/005542A1 |
The body (1) made of transparent plastic material has the shape of an elongate rectangle parallelepiped. In its longitudinal direction, the channel (2) goes through the body and opens out in the faces (3) and (4) of the body (1) delimiti...
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WO/1988/002482A1 |
A method for the determination of particle size and electric charge or zeta potential of particles dispersed in a fluid medium. The particle size and charge are determined from measurements of (1) the phase lag between an applied alterna...
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WO/1987/007032A1 |
A system for simultaneously locating a plurality of targets from noise which utilizes phase detector (164) techniques to generate complex voltage signals and obtain phase information. Spectral analysis (172) is performed on the complex v...
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WO/1987/006710A1 |
Device for measuring the flowrate of a free flow in space or the speed of a body in a fluid medium with a measurement head in the form of a flow body (1) which has as its measurement point first holes (2) extending into its hollow interi...
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WO/1987/004524A1 |
A jet velocity measuring apparatus for measuring the velocity of a fluid stream. The apparatus (10) measures the time delay between primary electronic signals generated by a first photosensitive device (32) as a result of a first beam of...
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WO/1987/003693A2 |
A process is used to determine the direction, the static and the dynamic pressure or the speed of a current on the basis of measured values of pressure or of differential pressures with the help of a new sensor having measuring chambers ...
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WO/1987/001606A1 |
A unitized drain manifold apparatus (10) for removing water from air in a conduit of an air data sensor system (9) for an aircraft (10) comprises a manifold (11) having a plurality of drain cavities (13) therein. Each drain cavity (13) h...
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WO/1987/001496A1 |
A method and an apparatus for measuring the rotational movement of objects or the vorticity by means of electromagnetic coherent radiation. In the radiation path from a laser (1) an optical element (6) is arranged, e.g. a grating or a bi...
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WO/1986/007465A1 |
A short multiple static pressure sensing probe (10) that is compenstated for both subsonic and supersonic speeds in the same probe and a family of such probes for different aircraft with each of the probes in the family having a common b...
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WO/1986/007192A1 |
An integrated semiconductor circuit comprising at least two mutually separated wafer parts (3, 4) of semiconductor material, and conductors (7) for establishing electrical connection between the wafer parts is characterized in that a the...
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