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    • 1. 发明授权
    • Fiber optical interferometric temperature sensor with ramp modulation
    • 具有斜坡调制的光纤干涉式温度传感器
    • US4714342A
    • 1987-12-22
    • US684925
    • 1984-12-18
    • David A. JacksonMichael CorkeAlan D. Kersey
    • David A. JacksonMichael CorkeAlan D. Kersey
    • G01K11/32G01J5/38G01B9/02
    • G01K11/32
    • A temperature sensor comprises a single-mode all-fiber Michelson interferometer. The interferometer includes a bi-directional coupler and signal and reference fibers having mirrored ends. These two fibers are of unequal lengths to provide an optical path length in-balance and the signal fiber may have a metal temperature sensing probe at its mirrored end. The injection current of a laser light source for the interferometer is modulated with a ramping signal so that a linearly moving interference pattern is produced at the output by mixing of the reflected beams propagated in the signal and reference fibers. The interference pattern is monitored by a photodetector and electronic circuitry processes the output of the photodetector to determine the optical phase shift between the light beams propagated in the signal and reference fibers, which phase shift is dependent on expansion or contraction of the signal fiber with respect to the reference fiber and is therefore related to the temperature at the sensing probe.
    • PCT No.PCT / GB84 / 00138 Sec。 371日期1984年12月18日 102(e)1984年12月18日PCT PCT。1984年4月24日PCT公布。 公开号WO84 / 04385 日期1984年11月8日。温度传感器包括单模全光纤迈克尔逊干涉仪。 干涉仪包括双向耦合器以及具有镜像端的信号和参考光纤。 这两条光纤具有不相等的长度以提供平衡的光路长度,并且信号光纤在其镜像端可以具有金属温度感测探针。 用于干涉仪的激光光源的注入电流用斜坡信号调制,使得通过混合传播在信号和参考光纤中的反射光束在输出端产生线性移动的干涉图案。 干涉图案由光电检测器监测,并且电子电路处理光电检测器的输出以确定在信号和参考光纤中传播的光束之间的光学相移,该相移取决于信号光纤的扩展或收缩 与参考光纤相关,因此与感测探头的温度有关。
    • 2. 发明授权
    • Optical pressure sensing apparatus
    • 光压感测装置
    • US4678909A
    • 1987-07-07
    • US810324
    • 1985-11-25
    • David A. JacksonMichael CorkeAlan D. KerseyJulian D. C. Jones
    • David A. JacksonMichael CorkeAlan D. KerseyJulian D. C. Jones
    • G01D5/353G01L11/02G01B11/02
    • G01L11/025G01D5/35303
    • Optical pressure sensing apparatus comprises an optical fibre interferometer arranged to sense the movement of a pressure responsive element and produce an interference signal at its output which can be monitored and processed to measure changes in the pressure applied to the pressure responsive element. The interferometer comprises a signal arm coupled to the pressure responsive element and a fixed reference arm. A light source supplies light to the input of the interferometer via an optical fibre and monitoring and processing electronics connected to the output determine the optical phase shift between the light beams propagated in the signal and reference arms and produce a pressure reading.
    • PCT No.PCT / GB85 / 00136 Sec。 371日期:1985年11月25日 102(e)1985年11月25日日期PCT提交1985年4月1日PCT公布。 第WO85 / 04473号公报 日期:1985年10月10日。光学压力感测装置包括光纤干涉仪,其布置成感测压力响应元件的运动并在其输出处产生干涉信号,其可以被监视和处理,以测量施加到压力的压力的变化 响应元素 干涉仪包括耦合到压力响应元件的信号臂和固定的参考臂。 光源通过光纤向干涉仪的输入提供光,并且连接到输出的监视和处理电子器件确定在信号和参考臂中传播的光束之间的光学相移并产生压力读数。
    • 3. 发明授权
    • Polarimetric fibre sensor
    • 偏光纤传感器
    • US4642458A
    • 1987-02-10
    • US774589
    • 1985-09-05
    • David A. JacksonMichael CorkeAlan D. Kersey
    • David A. JacksonMichael CorkeAlan D. Kersey
    • G01D5/34G01K11/32G02F1/01
    • G01D5/344G01K11/32
    • A polarmetric fiber sensor comprises a lead fiber (1) and a shorter length of sensing fiber (2). Both fibers comprise higly birefringent optical fiber having orthogonal eigen modes and are spliced together with their eigen modes mutually rotated by 45.degree.. The sensing fiber (2) has a reflective distal end (6). Linearly polarized light from a laser source (3) is launched into one mode of the lead fiber (1) and light reflected from the distal end of the sensing fiber is recovered from the other mode of the lead fiber via a beam splitter (7) and photodiode (8). The resulting electrical signal produced by the photodiode (8) corresponds to the modal birefringence of the sensing fiber (2) and changes in this birefringence are monitored by processing means (9) to detect changes in a physical parameter sensed by the sensing fiber.
    • PCT No.PCT / GB85 / 00017 Sec。 371日期:1985年9月5日 102(e)1985年9月5日PCT 1985年1月18日PCT PCT。 出版物WO85 / 03124 日期:1985年7月18日。一种光纤传感器包括引线光纤(1)和较短长度的传感光纤(2)。 两根纤维均包含具有正交本征模的高双折射光纤,并将其本征模式相互旋转45度而拼接在一起。 感测光纤(2)具有反射的远端(6)。 来自激光源(3)的线偏振光发射到引导光纤(1)的一种模式中,并且从感测光纤的远端反射的光通过分束器(7)从引线光纤的另一种模式恢复, 和光电二极管(8)。 由光电二极管(8)产生的电信号对应于感测光纤(2)的模式双折射,并且通过处理装置(9)监视该双折射的变化,以检测由感测光纤感测到的物理参数的变化。
    • 7. 发明授权
    • Lightweight wheel clamp for vehicle wheel alignment system
    • 车轮对准系统的轻型车轮夹
    • US08104185B2
    • 2012-01-31
    • US12881824
    • 2010-09-14
    • Brian K. GrayDavid A. JacksonRonald D. Swayne
    • Brian K. GrayDavid A. JacksonRonald D. Swayne
    • G01B5/255
    • G01B5/255
    • A lightweight wheel clamp assembly is provided for attaching to a vehicle wheel for performing a wheel alignment on the vehicle. The assembly comprises a first bracket for engaging the vehicle wheel; a second bracket for engaging the vehicle wheel; a handle rotatably mounted to the second bracket; and a rod having a threaded portion and an attachment portion near a first end of the rod. The first bracket is attachable to the attachment portion of the rod, and the handle is threaded to engage the threaded portion of the rod, such that when a user grasps and rotates the handle, a distance between the first and second brackets can be adjusted to rigidly attach the wheel clamp assembly to the vehicle wheel.
    • 提供了一种轻便的轮夹组合件,用于附接到车轮以在车辆上执行车轮定位。 组件包括用于接合车轮的第一支架; 用于接合车轮的第二支架; 可旋转地安装到第二支架的手柄; 以及在杆的第一端附近具有螺纹部分和附接部分的杆。 第一支架可附接到杆的附接部分,并且手柄被螺纹接合到杆的螺纹部分,使得当使用者握住并旋转手柄时,可以将第一和第二托架之间的距离调整为 将轮夹组件刚性地连接到车轮上。
    • 10. 发明授权
    • Method and apparatus of automatically identifying faults in a machine vision measuring system
    • 自动识别机器视觉测量系统故障的方法和装置
    • US06323776B1
    • 2001-11-27
    • US09468743
    • 1999-12-21
    • David A. JacksonHoshang ShroffDonald J. ChristianStephen Glickman
    • David A. JacksonHoshang ShroffDonald J. ChristianStephen Glickman
    • G08B2100
    • G06K9/6211G01B11/00G01B11/2755G01B2210/14G01B2210/26G01B2210/30G05B19/401G05B19/4184G05B2219/32207G05B2219/33327G05B2219/37205G05B2219/45019Y02P90/14
    • An apparatus and method for automatically identifying faults in the operation of a machine vision measuring systems provides an improved self-diagnostic capability for machine vision based metrology and tracking systems. The method and apparatus validate performance of tracking operations, and detect deterioration that may be caused by electronic noise, environmental contamination, etc. A mathematical model of the target visualized by the system is created and stored. A target is imaged in the field and fiducials of the target are identified. Centroid positions of detected fiducials of the imaged target are compared to the centroid positions of fiducials in the mathematical model. When a fiducial is obscured or dirty, its geometric characteristics (such as centroid, brightness, edge smoothness, area, or shape) differ from the true or idealized values of the characteristics. Values representing detected fiducials are discarded when the offset exceeds predetermined criteria, or when its properties vary from ideal. If the remaining number of detected fiducials is below a predetermined threshold, a warning message is displayed or an error is generated. Thus, when a fault is detected that degrades performance beyond a preset tolerance, the fault is flagged for attention and a suggested corrective action is displayed.
    • 用于自动识别机器视觉测量系统的操作中的故障的装置和方法为基于机器视觉的计量和跟踪系统提供了改进的自诊断能力。 该方法和装置验证跟踪操作的性能,并且检测可能由电子噪声,环境污染等引起的劣化。创建并存储由系统可视化的目标的数学模型。 目标在场中成像,并确定目标的基准。 将检测到的成像目标基准点的质心位置与数学模型中基准点的质心位置进行比较。 当基准被遮蔽或弄脏时,其几何特征(如质心,亮度,边缘平滑度,面积或形状)与特征的真实或理想值不同。 当偏移超过预定标准时,或当其性质与理想变化时,表示检测到的基准的值被丢弃。 如果检测到的基准的剩余数量低于预定阈值,则显示警告消息或产生错误。 因此,当检测到故障将性能降低到预设容差以下时,将该故障标记为需要注意,并显示建议的纠正措施。