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    • 1. 发明公开
    • FIBER OPTICAL GYRO.
    • 与光纤陀螺。
    • EP0434775A1
    • 1991-07-03
    • EP90905717
    • 1990-03-16
    • OPTISK FORSKNING INSTSTUBBE RAOUL
    • STUBBE RAOULSAHLGREN BENGTSVAHN LARS
    • G01C19/72
    • G01C19/72
    • L'invention concerne un gyroscope à fibres optiques comportant de préférence une diode laser (1) comme source de lumière, dont la lumière est divisée et acheminée dans les deux sens d'une bobine (3) de fibres optiques. On combine ensuite les faisceaux de contre-propagation, là où ils ont été divisés, puis on détecte (2) la différence de phase par interférométrie. Ladite différence de phase entre les deux faisceaux, le décalage Sagnic, apparaît lorsque la bobine mentionnée est mise en rotation. Selon l'invention, ledit gyroscope se compose de deux canaux alimentés en lumière de manière multiplexée dans le temps au moyen d'un coupleur directionnel (14), chaque canal pouvant se composer d'un polariseur (16), d'une ramification en Y (15) équipée de modulateurs de phase se trouvant sur les deux bras (17), et d'un coupleur de fibres (18), connectés partiellement à chaque canal, connectés partiellement à une des extrémités de ladite bobine de fibres (3), chacun des canaux ainsi que la source de lumière (1), le détecteur (2) et la bobine de fibres (3) constituant un gyroscope optique à fibres complet, lesdits deux canaux étant soit modulés différemment soit conçus différemment. Selon l'invention, on peut en outre utiliser une modulation sélective lors de la polarisation, laquelle est ensuite effectuée sur les deux faces de ladite bobine de fibres optiques. Le signal est ensuite détecté au moins dans la huitième harmonique de la fréquence de modulation.
    • 4. 发明申请
    • AN ARRANGEMENT FOR SENSING ELASTIC DEFORMATION OF A TOOL SHAFT IN A MACHINE TOOL
    • 用于感应机械工具中的弹性变形的布置
    • WO1997016282A1
    • 1997-05-09
    • PCT/SE1996001363
    • 1996-10-23
    • REFLEX INSTRUMENT ABSAHLGREN, BengtSTUBBE, RaoulERICSSON, Claes
    • REFLEX INSTRUMENT AB
    • B23Q17/24
    • B23Q11/141B23Q17/0952B23Q17/2495
    • There is shown an arrangement for detecting elastic deformation of a tool shaft carried by a machine tool and, in turn, carrying a cutting bit. An optical fibre section is mounted in or on the shaft at a distance from its neutral bending line in the longitudinal direction of said shaft. The optical fibre section, which follows the elastic deformation of the shaft, extends parallel with and at a constant distance from the neutral bending axis of said shaft, so that elongation of the fibre section forms a measurement of bending of the shaft in an axial plane that includes the optical fibre section. The optical fibre section has at least two longitudinally spaced partial reflection means and means are connected to the optical fibre section to determine interferometrically a change in distance between the partial reflection means in the optical fibre section, wherein the change in distance forms a measurement of shaft curvature between the two partial reflection means. The arrangement also includes means for compensating for the influence of temperature on the change in distance between the partial reflection means.
    • 示出了用于检测由机床承载的工具轴的弹性变形并进而携带切割钻头的布置。 光纤部分安装在轴上或轴上,与所述轴的纵向方向上的中立弯曲线距离一定距离。 随着轴的弹性变形的光纤部分与所述轴的中性弯曲轴线平行且恒定的距离延伸,使得纤维部分的伸长度在轴向平面中形成轴的弯曲测量 包括光纤部分。 光纤部分具有至少两个纵向间隔的部分反射装置,并且装置连接到光纤部分以确定光纤部分中的部分反射装置之间的距离变化的干涉测量,其中距离变化形成轴的测量 两个部分反射装置之间的曲率。 该装置还包括用于补偿温度对部分反射装置之间的距离变化的影响的装置。
    • 5. 发明申请
    • APPARATUS FOR DETERMINING THE CURVATURE OF AN ELONGATED HOLE, SUCH AS A DRILL HOLE, IN ROCK FOR INSTANCE
    • 用于确定延长孔的曲率的装置,如作为钻孔的钻孔,用于实现
    • WO1996025584A1
    • 1996-08-22
    • PCT/SE1996000084
    • 1996-02-09
    • REFLEX INSTRUMENT ABSAHLGREN, BengtSTUBBE, RaoulERICSSON, Claes
    • REFLEX INSTRUMENT AB
    • E21B47/022
    • G01B11/18E21B47/022G01B11/24
    • Apparatus for determining the curvature of an elongated channel, such as a drill hole in rock for instance, wherein the apparatus includes a probe (1) which may be constructed for movement through the channel and to assume the curvature of the channel at the different positions into which the probe is moved along the channel, wherein the probe (1) includes means (3, 31, 10) for sensing the curvature of the probe, and thus also the curvature of the channel, between at least two longitudinally spaced positions (A, B) on the probe (1), and wherein the apparatus can be connected to means (10) for determining the extension of the channel by registering curvature of the probe, for instance in different positions of the probe along the channel. The probe means include an optical fibre section (31) which is connected to a flexible probe body (3) arranged in the probe (1), wherein the optical fibre section (31) extends parallel with and at a constant distance from the bending neutral axis (44) of the probe body (3), such that strain acting in the fibre section will constitute a measurement of the bending or curvature of the probe body (3) in an axial plane (41) that includes the fibre section (31). The optical fibre section (31) has two partial reflection means (8a, 8b; 22a, 22b), for instance gratings, at said positions (A, B) along the probe. Means (10) are connected to the optical fibre section for interferometric determination of the change in distance between the partial reflection means in the fibre section (31). Means (32, 10) are provided for compensating for the influence of temperature on the change in distance between the partial reflection means.
    • 用于确定细长通道(例如岩石中的钻孔)的曲率的装置,其中所述装置包括探针(1),所述探头(1)可构造成用于通过通道移动并且在不同位置呈现通道的曲率 所述探针沿着所述通道移动到所述通道中,其中所述探针(1)包括用于感测所述探针的曲率的装置(3,31,10),并且因此还包括所述通道的曲率在至少两个纵向间隔位置之间 A,B),并且其中所述装置可以连接到用于通过登记所述探针的曲率来确定所述通道的扩展的装置(10),例如在所述探针沿着所述通道的不同位置。 探针装置包括光纤部分(31),其连接到布置在探针(1)中的柔性探针体(3),其中光纤部分(31)与弯曲中性点平行且恒定的距离延伸 使得在纤维部分中作用的应变将构成在包括纤维部分(31)的轴向平面(41)中的探针体(3)的弯曲或曲率的测量, )。 光纤部分(31)沿着探针在所述位置(A,B)处具有两个部分反射装置(8a,8b; 22a,22b),例如光栅。 装置(10)连接到光纤部分,用于干涉测定纤维部分(31)中的部分反射装置之间的距离变化。 提供装置(32,10),用于补偿温度对部分反射装置之间的距离变化的影响。
    • 8. 发明申请
    • FIBER OPTICAL GYRO
    • 光纤光栅
    • WO1990010843A1
    • 1990-09-20
    • PCT/SE1990000172
    • 1990-03-16
    • INSTITUTET FÖR OPTISK FORSKNINGSTUBBE, RaoulSAHLGREN, BengtSVAHN, Lars
    • INSTITUTET FÖR OPTISK FORSKNING
    • G01C0
    • G01C19/72
    • Fiber optical gyro with preferably a laser diode (1) as light source and of which light is divided and fed into both directions of a fiber-optic coil (3). The counter propagating beams thereafter are combined where they were divided and the phase difference is interferometrically detected (2). The phase difference between the two beams, the Sagnic-shift, appears when mentioned coil is rotated. According to the invention the gyro consists of two channels to which light feeds time multiplexed by means of a directional coupler (14), where each channel consists of possibly a polarizer (16), a Y-branch (15) equipped with phase modulators on both arms (17) and a fiber coupler (18), partly connected to each channel, partly connected to one of the ends of the fiber coil (3), and each of the channels together with light source (1), detector (2) and fiber coil (3) constitutes one by itself complete fiber optical gyro, but where the two channels either are modulated differently or are designed differently. According to the invention, further on polarization selective modulation can be used which then is performed at both sides of the optical fiber coil. The signal is then to be detected in at least the eighth harmonic of the modulation frequency.
    • 纤维光学陀螺仪优选具有作为光源的激光二极管(1),并且将光分成并馈送到光纤线圈(3)的两个方向。 此后的反向传播光束被组合在被划分的位置,并且相位差被干涉测量(2)。 当提到的线圈旋转时,出现两个光束之间的相位差,即Sagnic-shift。 根据本发明,陀螺仪由通过定向耦合器(14)进行时间多路复用的两个通道组成,其中每个通道可能包括偏振器(16),Y分支(15),其配备有相位调制器 部分地连接到每个通道的两个臂(17)和一个光纤耦合器(18)部分地连接到光纤线圈(3)的一个端部,并且每个通道与光源(1),检测器(2) )和光纤线圈(3)本身构成完整的光纤陀螺,但是其中两个通道被不同地调制或者被不同地设计。 根据本发明,还可以使用偏振选择调制,然后在光纤线圈的两侧进行。 然后在调制频率的至少八次谐波中检测信号。