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公开(公告)号：DE3142301A1
公开(公告)日：1982-06-16
申请号：DE3142301
申请日：1981-10-24
Applicant: ASEA AB
Inventor： BROGAARDH DOZENT TORGNY , OVREN CHRISTER
Abstract: The present invention relates to an optical sensor element of a solid material for sensing physical quantities such as pressure, which element is excitable to emit photoluminescence on excitation which constitutes a measure of the quantity being sensed. The sensor element comprises a diaphragm which consists of at least two layers applied to an apertured substrate, at least one of which layers has luminescent properties. The luminescence may be sensed by means of at least one optical fiber.
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公开(公告)号：CA1203701A
公开(公告)日：1986-04-29
申请号：CA441553
申请日：1983-11-21
Applicant: ASEA AB
Inventor： BROGARDH TORGNY , HOK BERTIL , OVREN CHRISTER
Abstract: A fiber-optic sensor for measuring a physical quantity or sensing changes therein, consists of a transmitter and receiver unit respectively arranged to transmit and receive optical energy and an optical fiber for transmission of said optical energy to and from a sensor located at the measurement point. The sensor has at least one solid body, which is arranged to emit photoluminescent optical energy in at least one wavelength range, and a volume limited by at least two substantially plane-parallel surfaces, the separation of which is smaller than half the coherence length for either the transmitted or luminescent optical energy, whereby an interference pattern will differently affect the transmission of optical energy to the receiver unit as the optical length between said parallel surfaces changes with changes in the physical quantity being sensed.
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公开(公告)号：CA1186525A
公开(公告)日：1985-05-07
申请号：CA420708
申请日：1983-02-01
Applicant: ASEA AB
Inventor： BROGARDH TORGNY , HOK BERTIL , OVREN CHRISTER
Abstract: A fiber optical measuring apparatus suitable for measuring physical quantities such as position, speed, acceleration, force, pressure, elongation, temperature, etc., comprises at least one optical fiber for conducting incident light between an electronic unit and a sensor, the sensor comprising at least one luminescent element. The measuring apparatus is characterized in that the physical quantity to be measured is arranged to influence the position of an optical spectral filter, for example of absorption or interference type, relative to the optical fiber in the sensor and/or relative to said luminescent element, and that said spectral filter is arranged to be situated, to a greater or lesser extent, between the end surface of the optical fiber and at least one of said luminescent elements.
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公开(公告)号：CA1189721A
公开(公告)日：1985-07-02
申请号：CA429413
申请日：1983-06-01
Applicant: ASEA AB
Inventor： ADOLFSSON MORGAN , BROGARDH TORGNY , HOK BERTIL , OVREN CHRISTER
Abstract: A fiber optical measuring device for measuring primarily electric voltage or magnetic field, comprises a transducer having a sensor element, the transducer being connected by means of at least one optical fiber to a measuring electronic unit provided with at least two light sources having different emission spectra for excitation of photo-luminescence in the sensor element and at least one photo-detector for detection of photoluminescene emanating from the sensor element. The sensor element includes at least one luminescent layer arranged so that light from said optical fiber is arranged to fall towards the surface of the layer. Between the end surface of the optical fiber in the transducer and the surface of the luminescent layer, there is arranged at least one optical filter perpendicular to the ray path of the light. The luminescent layer is provided with at least two electrodes to generate, in the layer, a lateral electric field for the purpose of accelerating charge carriers which are excited by light emitted from the measuring electronic unit and transmitted to the luminescent layer via the optical fiber and through at least one of the filters.
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Patent Agency Ranking
公开(公告)号：CA1168891A
公开(公告)日：1984-06-12
申请号：CA388350
申请日：1981-10-20
Applicant: ASEA AB
Inventor： ADOLFSSON MORGAN , BROGARDH TORGNY , GORANSSON STURE , OVREN CHRISTER
Abstract: The invention relates to an optical measuring device for measuring physical or chemical quantities which device employs at least one light source, such as a light-emitting diode, in optical connection with a sensor, the spectral properties of which (e.g. the absorption or luminescence spectrum) are adapted to be changed by the quantity being measured, and at least one light detector (e.g. a photo-diode or a phototransistor) for receiving the output signal from the sensor. The invention is characterised in that the measuring signal is adapted to be obtained by spectral analysis, and that this spectral analysis is adapted to be performed by varying the spectral distribution of the light source (the light-emitting diode) or maintaining said distribution constant, and/or by varying the sensitivity spectrum of the light detector or maintaining said spectrum constant, and that this control of the emission spectrum and the sensitivity spectrum is adapted to be carried out by a periodic controlling of the temperature of the light source and of the light detector, respectively.
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公开(公告)号：CA1163458A
公开(公告)日：1984-03-13
申请号：CA380337
申请日：1981-06-22
Applicant: ASEA AB
Inventor： ADOLFSSON MORGAN , BROGARDH TORGNY , OVREN CHRISTER
Abstract: The invention relates to a fiber-optically coupled measuring device which has an optically energised transducer section which produces signal information in an optical form, the energy supply for the transducer section and the signal information therefrom being transmitted via a light guide optical fiber. The signal information is transmitted to a receiver at a location remote from the transducer section, the signal information being modified in response to electrical signals fed to a light emitting component of the transducer section.
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公开(公告)号：FR2467395A1
公开(公告)日：1981-04-17
申请号：FR8021328
申请日：1980-10-06
Applicant: ASEA AB
Inventor： ENGSTROM OLOF , OVREN CHRISTER
IPC: G01D5/353 , G01J5/58 , G01K1/02 , G01K11/12 , G01K11/20 , G01K11/32 , G01J5/08 , G01K13/00 , G01J3/38 , G01J3/50 , G02B5/16
Abstract: A fiber-optic temperature-measuring apparatus which monitors the photo-luminescence of a body of solid material subjected to the temperature to be measured. Exciting radiation is conducted by means of at least one optical fiber towards a material with temperature-dependent luminescence which is in optical contact with the fiber, whereby luminescence occurs. The radiation emitted as a consequence of the luminescence is transmitted via at least one optical fiber from the body to a place of measurement, where a measure of the temperature may be obtained. The luminescent body may consist of a semiconductor material.
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公开(公告)号：CA1207173A
公开(公告)日：1986-07-08
申请号：CA430771
申请日：1983-06-20
Applicant: ASEA AB
Inventor： DUBON CHANTAL , HOK BERTIL , OVREN CHRISTER
Abstract: An hermetic seal at a smooth interface between a gallium arsenide body and a glass body is effected without organic or inorganic binders by thermally bonding the bodies at the interface while ensuring that the oxygen concentration at the interface is so low that there is no optically detectable variations in color of the gallium arsenide close to the interface.
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公开(公告)号：CA1206347A
公开(公告)日：1986-06-24
申请号：CA426319
申请日：1983-04-20
Applicant: ASEA AB
Inventor： BROGARDH TORGNY , HOEK BERTIL , OVREN CHRISTER
Abstract: _ 9 _ An optical position-measuring sensor has a monolithic structure which includes at least two volumes of photoluminescent material, which on excitation emit photoluminescent light with non-identical spectra. The at least two volumes are supported in the sensor by a resilient part (e.g. a beam or diaphragm), the deflection of which determines the wavelength distribution of the luminescent light which is coupled into an optical wave conductor (e.g. a light fiber) terminating in the sensor.
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