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Patent Searching and Data


Matches 251 - 300 out of 1,711

Document Document Title
WO/2005/038423A1
An apparatus for measurement of strain in a material. The apparatus comprises a passive fiber optic ring, at least one sensor having a predetermined shape and in line with the fiber optic ring, the at least one sensor ccoupled to the sub...  
WO/2005/033648A1
A pressure sensor (60) of a process device (52), is characterized by applying a plurality of pressures to the process sensor. Outputs of the plurality of pressures are received. A compensation relationship is determined based upon the pr...  
WO/2005/024365A2
An optical sensor (10) that provides for concurrent pressure and temperature measurements at substantially the same location includes at least one launch fiber (22) and at least one temperature sensitive material (52) having a refractive...  
WO/2005/019787A1
A pressure differentiator capable of enhancing measurement accuracy. The pressure differentiator comprises a temperature equalizing pressure vessel (1), a thin tube (3) communicating between an object of measurement and the temperature e...  
WO/2005/011511A1
Disclosed is a sensor for detecting a force acting on an elongate device, especially an elongate medical device such as a catheter, said force comprising a non-neglectable force component in the longitudinal direction of the elongate dev...  
WO/2005/003713A2
A sensor head characterizes unsteady pressures in a fluid flowing within a pipe,as may be caused by one or both of acoustic waves propagating through the fluid within the pipe and/or pressure disturbances that convect with the fluid flow...  
WO/2004/088266A1
The invention relates to a high-frequency resonator provided with two resonant cavities. The frequency of one of resonant cavities is modifiable by pressure variation applied thereto, the other resonant cavity being thermally connected t...  
WO/2004/081509A1
A method and system are disclosed for measuring pressure and/or other physical data, such as the temperature, elongation, torsion and/or bending at any point along the length of an elongate carrier tube by means of one or more coiled opt...  
WO/2004/079318A1
The invention relates to an economical pressure measuring device with which a pressure measurement can be carried out outside the high-pressure container (2, 12) (common rail). The device is comprised of an ultrasonic transmitter (3, 13)...  
WO/2004/070339A1
A method of calibrating pressure sensitive paint is provided comprising the steps of: illuminating the paint under a range of pressures and temperatures; measuring the intensity of light emitted by the paint following each illumination t...  
WO2004023171A8
An intrinsic Fabry-Perot optical sensor includes a thin film sandwiched between two fiber ends. In another embodiment, a portion of the cladding (320) of a fiber (310) is removed, creating two parallel surfaces. In a third embodiment, th...  
WO2004023171A3
An intrinsic Fabry-Perot optical sensor includes a thin film sandwiched between two fiber ends. In another embodiment, a portion of the cladding (320) of a fiber (310) is removed, creating two parallel surfaces. In a third embodiment, th...  
WO2004029570A3
The invention relates to a Bragg grating pressure sensor which is intended primarily for use in the chemical industry. The inventive sensor comprises, for example, an optical fibre (10) and a Bragg grating (14) which is formed in a segme...  
WO/2004/029570A2
The invention relates to a Bragg grating pressure sensor which is intended primarily for use in the chemical industry. The inventive sensor comprises, for example, an optical fibre (10) and a Bragg grating (14) which is formed in a segme...  
WO2003064988A3
The invention relates to core-shell particles comprising a shell which forms a matrix, and a core which is essentially solid and has an essentially monodisperse size distribution, the refractive index of the core material being different...  
WO/2004/023171A2
An intrinsic Fabry-Perot optical sensor includes a thin film sandwiched between two fiber ends. In another embodiment, a portion of the cladding (320) of a fiber (310) is removed, creating two parallel surfaces. In a third embodiment, th...  
WO/2004/011894A1
A conduit (106), with geometry designed to enhance pressure sensitivity, is vibrated at resonance in two modes along different cross-sectional axes (a, b). Measuring the change in the frequency ratio squared of the modes yields a substan...  
WO/2004/005876A1
The invention concerns a pressure sensor with temperature compensated optical fiber for detecting pressure variations in at least one environment relative to a reference environment such as atmosphere or an environment where a counter-pr...  
WO/2003/104155A1
A method for making a multicore large diameter optical fiber waveguide having a cross-section of at least about 0.3 millimeters, two or more inner cores, a cladding surrounding the cores, and one or more (side) holes for reducing the bul...  
WO/2003/104758A1
The invention provides a pressure transducer having a cane waveguide geometry with 'side-holes' in the cane cross-section that reduce the force required to compress the large diameter optical waveguide. The large diameter optical wavegui...  
WO/2003/104866A1
A tunable optical filter has a large diameter cane waveguide (10) with 'side-holes' (18) in the cane cross-section that reduce the force required to compress the large diameter optical waveguide without overly compromising the buckling s...  
WO/2003/100372A1
The invention concerns a method in a digital network system (27) for controlling the transmission of terminal equipment (10). Terminal equipment (10) includes a PTT (Push-to-Talk) function in order to at least activate the transmission t...  
WO/2003/098179A1
A fibre optic sensor deployed on a fibre optic cable to a remote location, such as an oil or gas well. The sensor, which can sense any of a variety of parameters such as pressure, temperature, flow rate, strain, or chemical properties, i...  
WO/2003/093770A1
A high-resolution fibber laser sensor for measuring a measuring variable M, comprising a pump light source (2), a fibber laser (1) and a detection evaluation unit (3). The fibber laser (1) consists of a double refracting first end reflec...  
WO2003073058A3
An apparatus for measuring gas pressure comprising a transmitter (18) for transmitting sound waves and a receiver (20) for receiving the transmitted sound waves, the receiver (20) being substantially face-to-face with the transmitter (18...  
WO/2003/073058A2
An apparatus for measuring gas pressure comprising a transmitter (18) for transmitting sound waves and a receiver (20) for receiving the transmitted sound waves, the receiver (20) being substantially face−to−face with the transmitter...  
WO/2003/064988A2
The invention relates to core-shell particles comprising a shell which forms a matrix, and a core which is essentially solid and has an essentially monodisperse size distribution, the refractive index of the core material being different...  
WO/2003/050576A1
A chiral fiber sensor (10) implemented in a chiral fiber (12) is provided that mimics advantageous optical properties of a cholesteric liquid crystal structure. In a passive sensor embodiment (10), the chiral fiber sensor of the present ...  
WO/2003/019127A1
The invention relates to optical devices for measuring pressure or force, comprising an electromagnetic radiation source, and a pressure membrane or a spiral spring which has a surface that at least partially reflects the electromagnetic...  
WO2002080774A3
The present invention relates to remotely determining local physical parameters in a fluid-filled cavity (e.g. heart cavities, blood vessels, industrial container) by means of ultrasound waves and encapsulated or stabilised gas bubbles. ...  
WO/2002/097388A1
A method and device for pressure sensing using an optical fiber having a core, a cladding and a Bragg grating imparted in the core for at least partially reflecting an optical signal at a characteristic wavelength. The cladding has two v...  
WO2001059419A9
A pressure sensor (10) configured to sense an applied pressure, comprising a diaphragm support structure (12), a diaphragm (16A, B) coupled to the diaphragm support structure and configured to deflect in response to applied pressure, a m...  
WO/2002/080774A2
The present invention relates to remotely determining local physical parameters in a fluid-filled cavity (e.g. heart cavities, blood vessels, industrial container) by means of ultrasound waves and encapsulated or stabilised gas bubbles. ...  
WO/2002/068925A1
The present invention provides an apparatus, system and method which enables a determination of pressure on a surface which is coated with a pressure sensitive paint which, when flashed with light, exhibits return light with a decay time...  
WO/2002/065077A1
Temperature-sensing compositions can include an inorganic material, such as a semiconductor nanocrystal. The nanocrystal can be a dependable and accurate indicator of temperature. The intensity of emission of the nanocrystal varies with ...  
WO/2002/061385A1
A device for testing the inflation state of an cold gas inflator for an airbag has a gas reservoir (6, 6a) that is filled with gas at a high pressure, in particular an inert gas. Oscillations of frequencies varying within a particular fr...  
WO/2002/039068A1
A fiber optic sensor system permits multiple parameters to be sensed using a single sensor. In a described embodiment, a method of sensing multiple parameters is provided in which an interferometric fiber optic sensor is connected to a v...  
WO/2002/033374A1
The invention relates to a DFB fiber laser sensor (1). The inventive laser-amplifying fiber (2) has a non-rotational-symmetrical structure so that isotropic pressures p, acoustic waves or chemical substances that can be radially attached...  
WO/2002/027382A1
An optical fiber connector has fixing parts (1V, 1V) where ends of two optical fibers (5, 6) are fixed, a photonic crystal (2) disposed in the optical path where light is propagated between the ends, and external force exerting means (3)...  
WO/2002/010703A1
A pressure sensor comprises a diaphragm (6) with a first pressure-sensitive surface, a first thermal detector (3) having a heat-sensitive resistor opposed to a central portion of the diaphragm with a spacer (7), and a second thermal dete...  
WO/2002/006786A1
A pressure sensor comprises a diaphragm (6) with a first pressure-sensitive surface, a first thermal detector (3) having a heat-sensitive resistor opposed to a central portion of the diaphragm with a spacer (7), and a second thermal dete...  
WO/2001/090712A1
The invention relates to a device for determining/monitoring the pressure or differential pressure of at least one process medium. The aim of the invention is to provide a device for measuring pressure or differential pressure extremely ...  
WO/2001/059420A1
Methods and apparatus for measuring differential pressure with fiber optic sensor systems are disclosed. The apparatus of the present invention include both monopolar and bipolar sensors, sensors incorporating side-hole fibers, sensors i...  
WO/2001/059418A1
A pressure sensor (10) is provided for measuring a pressure difference between two fluids which does not require isolation fluid. The pressure sensor includes a diaphragm support member (12) having an outer periphery and diaphragms coupl...  
WO/2001/059419A1
A pressure sensor (10) configured to sense an applied pressure, comprising a diaphragm support structure (12), a diaphragm (16A, B) coupled to the diaphragm support structure and configured to deflect in response to applied pressure, a m...  
WO/2001/055688A1
A fluid diffusion resistant tube-encased fiber grating pressure sensor includes an optical fiber (10) having a Bragg grating (12) impressed therein which is encased within a sensing element, such as a glass capillary shell (20). A fluid ...  
WO1999000653A3
Device (100) for measurement of pressure in fluids, comprising a cylindrical housing (101) having a pressure port (103), an inner cavity (102) and an opening (102b). A closed pipe (131) is situated in the cavity (102) and closes the open...  
WO/2001/036928A1
A pressure sensor assembly for determining the pressure of a fluid in a harsh environment includes a pressure sensor suspended within a fluid filled housing. The assembly includes a pressure transmitting device which transmits the pressu...  
WO2000037914A9
A fiber grating pressure sensor includes an optical sensing element (20, 600) which includes an optical fiber (10) having a Bragg grating (12) impressed therein which is encased within and fused to at least a portion of a glass capillary...  
WO/2001/014843A1
A fiber optic pressure sensor has an optic fiber (1) with at least two Faser-Bragg-gratings (10, 11, 12) and a pressure transfer element (2) consisting of a pressure body (3) and a reference body (4). Said pressure body (3) and reference...  

Matches 251 - 300 out of 1,711