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    • 53. 发明公开
    • Signal processing system of optical fiber gyro
    • Faserkreisel信号技术系统。
    • EP0475597A1
    • 1992-03-18
    • EP91307512.3
    • 1991-08-14
    • SUMITOMO ELECTRIC INDUSTRIES, LIMITED
    • Washimi, Kouichi, Osaka Works
    • G01C19/72
    • G01C19/721
    • A signal processing system of an optical fiber gyro comprises a light emitting element (1) for generating a monochromatic light, a fiber coil (4), a branching element (2) for dividing the monochromatic light into clockwise and counterclockwise lights, for transmitting the clockwise and counterclockwise lights to opposite ends of the fiber coil (4), respectively, and for uniting again the clockwise and counterclockwise lights into a coherent light, a light receiving element (6) for detecting an intensity of the coherent light, and an auxiliary light receiving element (15) for monitoring an output of the light emitting element (1). When the light emitting element output is less than a predetermined value, a power for driving the light emitting element (1) is controlled so that a direct current component or even times higher harmonics component of a sensor signal obtained from the light receiving element (6) becomes constant. When, on the other hand, the light emitting element output has reached the predetermined value, the light emitting element output is controlled by a monitoring signal of the auxiliary light receiving element (15) so that it does not exceed the predetermined value.
    • 光纤陀螺仪的信号处理系统包括用于产生单色光的发光元件(1),光纤线圈(4),用于将单色光分为顺时针和逆时针光的分支元件(2),用于传输 顺时针和逆时针分别点亮到光纤线圈(4)的相对端,并且用于将顺时针和逆时针的光再次组合成相干光,用于检测相干光的强度的光接收元件(6) 用于监测发光元件(1)的输出的光接收元件(15)。 当发光元件输出小于预定值时,控制用于驱动发光元件(1)的功率,使得从光接收元件(6)获得的传感器信号的直流分量或偶次次高次谐波分量 )变得不变。 另一方面,当发光元件输出达到预定值时,发光元件输出由辅助光接收元件(15)的监视信号控制,使得其不超过预定值。
    • 55. 发明公开
    • CLOSED LOOP FIBER OPTIC GYROSCOPE
    • 陀螺仪闭环光学纤维。
    • EP0396632A1
    • 1990-11-14
    • EP89904312.0
    • 1989-01-27
    • BERGH, Ralph A.
    • BERGH, Ralph A.
    • G01C19H01S3
    • G01C19/721G01C19/726
    • Dans un gyroscope à fibre optique en boucle fermée (10), les ondes de lumière se propageant en sens inverse sont modulées en phase par une modulation d'onde triangulaire, l'onde triangulaire étant inclinée (47) pour verrouiller la différence de phase (DELTAo) entre les ondes à propagation inversée, en alternance sur des valeurs spécifiques (Upi) de différence de phase qui sont supérieures et inférieures à la différence de phase due à la rotation entre (DELTAOr). La différence de temps écoulé entre la pente ascendante (T1) et la pente descendante (T2) de la modulation d'onde triangulaire fournit une mesure de l'angle de rotation (), tandis que ladite différence de temps écoulé divisée par le temps écoulé total donne la vitesse de rotation (OMEGA). La différence de phase (DELTAo) est également modulée à une fréquence supérieure sur les valeurs de verrouillage, ladite modulation étant détectée de manière synchrone pour produire une composante de signal de vitesse de rotation, laquelle composante est utilisée pour générer une onde triangulaire inclinée (47). Diverses autres caractéristiques sont mises en oeuvre pour réduire les erreurs de polarisation de lumière.
    • 56. 发明公开
    • Means and methods for measuring a parameter
    • Mittel und Verfahren zur Messung eines参数。
    • EP0358533A2
    • 1990-03-14
    • EP89309187.6
    • 1989-09-11
    • HONEYWELL INC.
    • Cramp, David M.McBrien, Gregory J.
    • G01C19/72
    • G01C19/721
    • Means and method for measuring the magnitude of a parameter related to serrodyne modulation of an integrated optic phase modulator are disclosed. The phase modulator is viewed as a repository of angle information, in the form of charge. As a result of this insight, a new measurement technique may be employed to draw that charge off in a controlled fashion and achieve a much more reliable indication of the measured parameter. For example, a quantity of charge stored in the phase modulator is measured (158,160) and, in response to monitoring a first selected quantity of stored charge, a measuring signal (174) is provided for a selected duration. A second selected quantity of charge is then discharged (180,182) from the phase modulator(150) in response to the measuring signal. The same second selected quantity is discharged each time the stored charge reaches the first selected quantity. Occurrences of said measuring signal are counted (200) as an indication of the magnitude of the parameter.
    • 公开了用于测量与集成光学相位调制器的脉宽调制相关的参数的幅度的方法和方法。 相位调制器被视为电荷形式的角度信息库。 作为这种洞察的结果,可以采用新的测量技术来以受控的方式绘制电荷,并且获得对测量参数的更可靠的指示。 例如,测量存储在相位调制器中的一定量的电荷(158,160),并且响应于监视第一选定数量的存储电荷,在所选择的持续时间内提供测量信号(174)。 然后响应于测量信号,从相位调制器(150)释放第二选定数量的电荷(180,182)。 每当存储的电荷达到第一选定数量时,相同的第二选定数量被排出。 计数(200)所述测量信号的出现作为参数大小的指示。
    • 57. 发明公开
    • Interferometric sensor using time domain measurements
    • Interferometersensor mitzeitaufgelöstenMessungen。
    • EP0296746A2
    • 1988-12-28
    • EP88305390.2
    • 1988-06-13
    • THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
    • Kim, Byoung Yoon
    • G01C19/64
    • G01C19/721
    • An interferometer used as a rotation sensor is constructed using a strand of optical fiber (112), a portion of which is formed into a sensing loop (114). A pair of lightwaves (W₁, W₂) are caused to counterpropagate in the sensing loop (114) and are combined to form an optical output signal that has an intensity that varies in accordance with the difference in the phases of the two counterpropagating lightwaves (W₁, W₂). A phase modulator (192) is positioned on the optical fiber (112) in the sensing loop (114) at a location such that the two counterpropagating lightwaves (W₁, W₂) are modulated approximately 180° out of phase. The time-varying phase modulation causes a time-varying phase difference (ΔΦ M (t)) that is combined with a rotationally-induced Sagnac effect phase to provide a total phase difference that is detected by a photodetector (160). The photodetector (160) provides an electrical output signal this is differentiated to provide a differentiated output signal (520, 450, 460) that has zero-crossings (H′, L′) that correspond to maxima and minima of the electrical output signal. The time intervals (Δt₁′) between selected zero-crossings (H′, L′) are measured and the rotationally-induced phase difference (ΔΦ R ) caused by the Sagnac effect is calculated from the measured time intervals (Δt₁′) The rotation rate (Q) is then calculated from the Sagnac phase difference (ΔΦ R ).
    • 用作旋转传感器的干涉仪使用一束光纤(112)构成,其一部分形成感测回路(114)。 使一对光波(W1,W2)在感测回路(114)中相反传播,并被组合以形成光输出信号,该光输出信号的强度根据两个反向传播光波的相位差(W1 ,W2)。 相位调制器(192)位于感测回路(114)中的光纤(112)上,使得两个反向传播光波(W1,W2)相位调制为大约180°。 时变相位调制引起与旋转诱导的Sagnac效应相组合的时变相位差(DELTA PHI M(t))以提供由光电检测器(160)检测的总相位差。 光电检测器(160)提供电输出信号,其被微分以提供具有与电输出信号的最大值和最小值相对应的过零点(H min,L min)的微分输出信号(520,450,460)。 测量所选过零点(H min,L min)之间的时间间隔(DELTA t1 min),并从测量的时间间隔(DELTA t1 min)计算由Sagnac效应引起的旋转诱导相位差(DELTA PHI R) )然后根据Sagnac相位差(DELTA PHI R)计算转速(Q)。