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    Apparatus and method for measuring the torsion of a test object
    1.
    发明授权
    Apparatus and method for measuring the torsion of a test object 有权

    公开(公告)号：US10578427B2

    公开(公告)日：2020-03-03

    申请号：US16474297

    申请日：2017-12-22

    Applicant: fos4X GmbH

    Inventor： Mathias Müller ,  Florian Rieger ,  Thomas Grübler ,  Benjamin Zorn

    IPC: G01B11/26 ,  G01B11/16 ,  F03D17/00

    Abstract: The invention discloses an apparatus for measuring the torsion between a first point (41) and a second point (42) of a test object (1), said second point being spaced apart from the first point. The apparatus comprises the following: a source of polarized light, comprising a polarizing light source (15) that emits polarized light, or a polarizer (20) that is connected to a light source (10) by way of an optical feed; a first optical fibre (40) that is optically connected to the Output of the polarizing light source (15) or to the Output of the polarizer (20) and that is fastened to the test object (1) at the first point (41) and at the second point (42) in such a way that a torsion of the test object about a torsion axis causes a change in the angle of rotation of the first optical fibre from the first point in relation to the second point, and a second polarization-maintaining optical fibre (50), that is connected to the first optical fibre (40) at the second point (42) or downstream of the second point (42) in relation to the light path Coming from the source, for supplying the light to a measuring device (30, 31), wherein the distance between the first point (41) and the second point (42) of the test object (1) is greater than or equal to 5 metres, or greater than or equal to 7 metres, or greater than or equal to 10 metres, and the first optical fibre (40) comprises a non-polarization-maintaining, bending-insensitive fibre.

    Sensor patch and method for producing a sensor patch
    3.
    发明授权
    Sensor patch and method for producing a sensor patch 有权

    公开(公告)号：US10684145B2

    公开(公告)日：2020-06-16

    申请号：US15761152

    申请日：2016-09-20

    Applicant: FOS4X GMBH

    Inventor： Mathias Müller ,  Fabian Zelenka

    IPC: G01D5/353 ,  G01L1/24 ,  G01M5/00

    Abstract: A sensor patch (110) is provided that includes a light guide (112) having a sensor element (111). Further, the sensor patch (110) includes a carrier structure having a first fastening element (301) for fastening the light guide (112) at a first position (401), and a second fastening element (302) that is spaced apart from the first fastening element (302) for fastening the light guide at a second position (402), wherein the sensor element (111) is arranged between the first position (401) and the second position (402), an intermediate carrier (500) having a first surface (503), on which the first and second fastening elements (301, 302) are mounted at respective fastening positions (501 502), and an opposing second surface (504) that can be mounted on a measurement object, and a covering element (303) arranged on the intermediate carrier (500) and connected thereto. The covering element (303) has together with the intermediate carrier (500) a cross-sectional dimension, which is oriented approximately perpendicular to a longitudinal extension of the light guide (112), in such a way that the light guide (112) extends in the neutral fiber (900) of the sensor patch (110).

    Light guide clamping device, fiber optic sensor and production method
    5.
    发明授权
    Light guide clamping device, fiber optic sensor and production method 有权

    公开(公告)号：US10761261B2

    公开(公告)日：2020-09-01

    申请号：US15761147

    申请日：2016-09-20

    Applicant: FOS4X GMBH

    Inventor： Mathias Müller ,  Fabian Zelenka

    IPC: G02B6/02 ,  G01D5/353 ,  G01B11/16 ,  G01B5/00 ,  G02B6/36

    Abstract: A clamping device (300) for a light guide (112) is provided. The clamping device (300) includes a carrier structure having a first securing element (301) for securing the light guide (112) in a first position (401), and a second securing element (302) at a distance from the first securing element (301) for securing the light guide (112) in a second position (402), wherein the first and second positions (401, 402) have a first distance (403) in a longitudinal extension of the light guide (112). Further, an intermediate carrier (500) having a first surface (503) on which the first and second securing elements (301, 302) are attached in respective securing positions (501, 502), and an opposing second surface (504), which can be applied to a measurement object, is provided. Hereby, a second distance (505) of the securing positions (501, 502) of the securing elements (301, 302) on the intermediate carrier (500) is greater than the first distance (403) in a longitudinal direction of the light guide (112).

    Method for predicting the accumulation of ice on a rotor blade of a wind turbine and the use thereof
    6.
    发明授权
    Method for predicting the accumulation of ice on a rotor blade of a wind turbine and the use thereof 有权

    公开(公告)号：US10718316B2

    公开(公告)日：2020-07-21

    申请号：US16066815

    申请日：2016-12-05

    Applicant: FOS4X GMBH

    Inventor： Mathias Müller ,  Thomas Schauss ,  Florian Rieger ,  Mathias Schubert

    IPC: F03D80/40 ,  F03D17/00

    Abstract: Embodiments describe a method for predicting the accumulation of ice on a rotor blade (111, 112) of a wind turbine (100) and the use thereof. The method comprises defining an upper threshold value (So) and/or a lower threshold value (Su) for a system variable (S) which is associated with the mass of the rotor blade (111, 112) and/or with the mass of an ice attachment (1) of the rotor blade (111, 112); acquiring system variable data during an acquisition time period (T); carrying out a compensation calculation of the curve profile for a prediction time period (Δt1′, Δt2′, Δt3′) from the system variable data which were acquired during a partial time period (Δt1, Δt2, Δt3) of the acquisition time period (T) in order to obtain a prediction curve (N1, N2, N3); carrying out at least one further compensation calculation of the curve profile for a further prediction time period (Δt1′, Δt2′, Δt3′) from the system variable data which were acquired during another partial time period (Δt1, Δt2, Δt3) of the acquisition time period (T) in order to obtain a further prediction curve (N1, N2, N3); determining whether or not the upper threshold value (So) will be exceeded by one or more of the prediction curves (N1, N2, N3) in future and/or whether the lower threshold value (Su) will not be undershot by one or more of the prediction curves (N1, N2, N3) in the future; and outputting the result of the determination; and outputting the result of the determination.

    METHOD AND DEVICE FOR THE FUNCTIONAL TESTING OF A FIBRE-OPTIC SENSOR AND COMPUTER PROGRAM PRODUCT
    7.
    发明申请
    METHOD AND DEVICE FOR THE FUNCTIONAL TESTING OF A FIBRE-OPTIC SENSOR AND COMPUTER PROGRAM PRODUCT 审中-公开

    公开(公告)号：US20190265097A1

    公开(公告)日：2019-08-29

    申请号：US16334735

    申请日：2017-09-11

    Applicant: fos4X GmbH

    Inventor： Mathias Müller

    IPC: G01H9/00 ,  G01D18/00 ,  G01L1/24 ,  F03D17/00 ,  G01D5/353 ,  G01P15/093

    Abstract: The invention relates to a method (200) for the functional testing of a fibre-optic sensor (110). The method (200) comprises receiving (220) optical sensor signals of the fibre-optic sensor (110) in an evaluation unit (124), determining (230) a first variable from the optical sensor signals, determining (240) whether the first variable lies within a pre-determined range, determining (250) a malfunction of the fibre-optic sensor (110) if the first variable lies outside the pre-determined range, and determining (260) a second variable from the optical sensor signals, which is different from the first variable, if it is determined that the first variable lies within the pre-determined range, the second variable declaring a parameter that is to be determined by the fibre-optic sensor (110).

    Acoustic emission sensor having at least two mechanical coupling elements
    9.
    发明授权
    Acoustic emission sensor having at least two mechanical coupling elements 有权

    公开(公告)号：US11237134B2

    公开(公告)日：2022-02-01

    申请号：US16475057

    申请日：2017-12-28

    Applicant: FOS4X GMBH

    Inventor： Mathias Müller ,  Markus Schmid ,  Sascha Kienitz

    IPC: G01N29/14 ,  G01H9/00 ,  G02B6/32

    Abstract: The invention relates to an acoustic emission sensor (100). The acoustic emission sensor comprises an optical resonator (10) having a sensor region (11) configured for reflective operation; an optical waveguide (20) which is optically coupled to the optical resonator (10); a light source (31) which is optically coupled to the optical waveguide (20) to apply light to the optical waveguide (20); and a detection device (32) which is optically coupled to the optical waveguide (20) to detect light from the optical resonator (10). The sensor region (11) of the optical resonator (10) comprises a coupling device (50) for mechanically coupling to a solid measurement object (200). The coupling device (50) comprises a first coupling element (51) for transmitting an acoustic emission signal between the sensor region (11) and the solid measurement object (200), and at least one second coupling element (52). The second coupling element (52) is configured to position the coupling device (50) on the solid measurement object (200), and/or the second coupling element (52) acts as a filter for the acoustic emission signal.

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