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WO1994016346A1 |
The converter comprises a sensing element (2) based on a fused biconical splitter consisting of multimode optical fibres (3) with a reduced-mode constriction (4). The constriction (4) is situated within a silicon membrane (5) housed in a...
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WO/1994/004898A1 |
An ultra-sound testing device for gas pressure accumulators is used to test a predeterminable set position that can be taken by a movable separating element (20) inside an accumulator (10) that can be filled with gas and connected to a f...
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WO/1994/002816A1 |
A sensor for use in an optic system to detect current conditions in an environment. The sensor has a crystal member with a first waveguide extending from a top surface and a second waveguide extending from a bottom surface of a core memb...
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WO/1994/000051A1 |
This invention relates to a blood pressure transducer (8) and provides a safe and economical transducer by providing a novel optical fiber (80) made of a transparent elastomer. The present invention provides an invasive direct blood pres...
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WO/1993/022643A1 |
A method and apparatus for measuring differences between forces, pressures, and combinations thereof. One or more force or pressure deformable members, preferably metal bellows, are internally connected by rigid linkage which is in turn ...
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WO/1993/022624A1 |
An optical displacement sensor (10) comprises a flexible tube (13) having a reflective internal surface. One end of the tube (13) is connected to a light source (14) via a solid optical fibre (11). The other end of the tube (13) is conne...
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WO/1993/022645A1 |
Apparatus for measuring pressure, which apparatus comprises a pressure valve (3) for location at a point at which pressure is to be measured, a primary tube (1) containing a fluid for linking the pressure valve (3) to a control point whe...
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WO/1993/017314A1 |
An optical fibre pressure sensor in which two or more lengths of side-hole fibre (1, 2) are joined together at their ends, in which at a joint (3) the two pieces are rotated relative to one another around their common longitudinal axis, ...
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WO/1993/008478A1 |
A microwave resonant cavity (2) contains a dielectric (3) whose normal RF electromagnetic modes are varied by displacement of a probe (6) whereby acceleration of the cavity displaces the probe (6). The acceleration vector or displacement...
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WO/1993/004343A1 |
A nonintrusive flow sensing system (10) and related method are provided for monitoring fluid flow within a conduit (14), particularly such as a liquid flow (12). The sensing system (10) includes an array of ultrasonic transducers (18, 20...
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WO/1992/010730A1 |
The object of the invention is a method and sensor (10) for measuring air pressure by means of a membrane (14) in such a way that air pressure is allowed to affect both sides of the membrane, whereupon the pressure difference between the...
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WO/1992/002912A1 |
An apparatus for determining various physical quantities such as temperature, pressure, stress, strain, distance and the like in a manner such that a change in the physical quantity of interest results in a measurable change in the frequ...
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WO/1992/000506A1 |
The optical fibre parameter measuring device comprises a light source (S); at least one optical fibre (1) which is sensitive to the measured parameters (P1, P2) and has stable modes triggered by the light source (S), whereby a variation ...
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WO/1991/019965A1 |
A fibre optic pressure sensor has a pressure-measuring head (10) with a housing (12) which houses a membrane (13) which functions as a pressure sensor and executes a lifting movement when subjected to pressure. The inside (13') of the me...
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WO/1991/016612A1 |
A method for determining the field of pressure of a continuous fluid medium (1) on the surface of an object (2), based on the effect of quenching the luminescence of certain luminophores by an active substance and providing for the appli...
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WO/1991/013329A1 |
A pressure sensor is described which uses a single mode optical waveguide such as a single mode optical fibre (11). Light is supplied to the fibre via a polarizer (12) and is received from the fibre either, after reflection, through the ...
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WO/1991/012545A1 |
A quasi-distributed sensor array in an optical fibre (10), wherein the sensors are divided along the fibre by intermodal coupling zones formed by insulating the optical fibre (10) using a laser beam (16) passing through a mask (18) havin...
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WO/1990/015975A1 |
A transmitter (10) measures pressures and has a pressure sensor (88) and an additional pressure sensor (90) providing additional measurement capability to the transmitter (10), such as an extended measurement range or measurement redunda...
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WO/1990/002322A1 |
The apparatus comprises a receptacle for holding a quantity of reference material having known variation of refractive index with changes in the test parameter (which may be temperature, pressure or the like); an elongate optical wavegui...
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WO/1989/006512A1 |
An optical reflection hydrophonic probe is useful for determining the pressure-time behaviour of pressure waves in fluids. One end of an optical waveguide (glass fibre) dips into the fluid. The reflection of light at the tip of the glass...
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WO/1989/006350A1 |
The present invention concerns a differential pressure meter for measuring differential pressure between two different points. As taught by the invention, the meter comprises two vertical, substantially transparent tubes (1, 2), said tub...
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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/1988/003388A1 |
In an ultrasonic process for pressure measurement in a liquid containing stabilized micro-bubbles in a system, ultrasonic pulses are irradiated into the liquid and made to interact with micro-bubbles. The amplitude and/or frequency chang...
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WO/1988/002545A1 |
An optical apparatus for measuring physical quantities, comprising an optical transducer (33) for sensing position, outgoing and return optical fibers (20, 23), and an electronic sensor control module (43). Light is generated at the cont...
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WO/1987/007014A2 |
A pseudo random bit sequence is amplitude modulated onto a light source (2) (other types of modulation are discussed in the specification) and this modulated beam is transmitted down an optical fibre (3) or any material and the detected ...
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WO/1987/004789A1 |
Pneumatic pressure sensor of the kind where the pressure to be sensed acts on a diaphragm (50) which moves to control the exhaust of gas from a pressurized control chamber (20). The invention provides means for inhibiting or preventing t...
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WO/1986/000988A1 |
A fibre-optic cable responsible to microbending and forming part of a device for measuring pressure in accordance with the principle of creating a periodic mechanical disturbance in the fibre. The cable comprises a fibre (F) having a cor...
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WO/1985/005678A1 |
A transducer to measure pressure or temperature comprising a quantity of compressible material such as gas and a quantity of incompressible material such as liquid and proper means (16, 17) to detect volume and interface(s) (14) changes ...
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WO/1985/004473A1 |
Optical pressure sensing apparatus comprises an optical fibre interferometer (4) arranged to sense the movement of a pressure responsive element (3) and produce an interference signal at its output (20) which can be monitored and process...
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WO/1985/003855A1 |
An optical fiber fluid flow device is provided for in vivo determination of blood flow in arteries. The device includes a fiber optical fluid pressure measuring device having at least first and second optical fiber sensors which optical ...
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WO/1983/003136A1 |
A closed pressure monitoring system (20) in which a pump (27) delivers gas on a supply line (22, 29) through a first accumulator chamber (30) to a load device (21) and returns the gas on a returnline (23, 28) through a second accumulator...
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WO/1982/003976A1 |
An apparatus (10) which measures and monitors the pressure within a human body includes a pressure sensor (11) having a housing (30) closed by a pressure sensitive diaphragm (34) to define a plenum (35), an exhaust tube (36) mounted with...
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WO/1981/000618A1 |
An optical fiber (10) having at least two cores (12 & 14) positioned in a common cladding (16) can be fabricated to be responsive to strain or hydrostatic pressure (20) but not to temperature through the selection of materials, spacing a...
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WO/1979/000377A1 |
A sensor for measuring stress, temperature, pressure, sound, etc. comprising an optical fiber waveguide (24 of Fig. 6), a light source (22) which injects light (30) into one end of the waveguide, a deformer (27) contacting and deforming ...
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JP2024516729A |
Aspects of the present disclosure relate to non-destructive devices and methods for determining the pressure of liquid within a pipe. The method includes transmitting ultrasound with a first probe, the first probe being disposed on a sur...
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JP2024514038A |
The present invention relates to a method for fastening an assembly (100) to a container intended to contain a fluid under pressure, the assembly (100) comprising a housing (1) and a strain gauge (2). - fastening the strain gauge (2) to ...
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JP2024037135A |
A method for dynamic recalibration of an optical air data system is provided. The system includes a non-optical air data sensor that interrogates a region of interest external to the vehicle to determine a first set of air data measureme...
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JP7450929B2 |
To provide a pressure measurement system, a pressure measurement method, and a program capable of more practically measuring pressure in an organism.The system comprises: a container having a space to store a liquid; a film which is made...
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JP2024511002A |
The present disclosure relates to pressure gauges for expandable articles. The pressure gauge includes a housing. The pressure gauge includes an indicator chamber defined within the housing. The pressure gauge includes a resilient diaphr...
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JP2024015656A |
The present invention provides a gas physical quantity detection device and a gas physical quantity detection method that can improve performance by using a thermopile widely used for temperature measurement to measure physical quantitie...
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JP3245495U |
The present invention provides a test device for gas pressure measurement based on ultrasonic waves that is highly accurate and easy to operate. [Solution] A test device for gas pressure measurement based on ultrasound includes an air su...
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JP7409596B2 |
A pressure measuring unit according to an embodiment of the present disclosure includes: a body part configured to have an upper surface, a lower surface, and a plurality of side surfaces; a connector part configured to be provided to at...
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JP2023551260A |
A sensor assembly including a substrate and a set of sensors. The set of sensors includes pressure sensors and/or flow sensors located across the surface of the substrate. Each sensor of the plurality of sensors is adapted to measure a r...
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JP2023166540A |
To provide a method for measuring steam pressure of a fluid.A method includes a step of providing a meter (5) with a meter electronic device (20). The meter (5) is at least one of a flowmeter and a densimeter. A process fluid is flowed i...
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JP7345053B2 |
A method of determining vapor pressure of a fluid is provided. The method comprises the step of providing a meter having meter electronics, wherein the meter comprises at least one of a flowmeter and a densitometer. A process fluid is fl...
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JP7338710B2 |
A water pressure fluctuation measuring system detects a water pressure fluctuation. A cable, which includes an optical fiber, is provided on or in the ground of the seabed in such a way that the optical fiber is expanded and contracted a...
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JP2023116427A |
To provide improved systems and methods for detecting and taking into account ice and other contaminants accumulating on optical pressure sensors.A system includes an optical pressure sensor. A controller is operatively connected to rece...
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JP7313214B2 |
To provide a sterilization device and a washing device capable of achieving a set condition, and easily and accurately confirming presence of abnormality in each step, relative to prior arts, in monitoring using a temperature value and a...
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JP2023100647A |
To provide a new optical pressure sensor that is designed to be less exposed to mechanical stresses, thereby avoiding an adverse effect related to these stresses.An optical pressure sensor comprises a sensor housing and an optical pressu...
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JP2023528433A |
Capillary-based pressure threshold sensors take advantage of the properties of hydrophobic, superhydrophobic, oily and amphoteric porous membranes when the pressure across the membrane rises above the breakthrough pressure of the fluid S...
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