会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 8. 发明授权
    • Concatenated magneto-optic field sensors
    • 串联磁光场传感器
    • US5736737A
    • 1998-04-07
    • US561810
    • 1995-11-22
    • Jay W. DawsonTrevor W. MacDougall
    • Jay W. DawsonTrevor W. MacDougall
    • G01R15/24G01R19/00G01R33/032H01J5/16G01J4/00
    • G01R33/0322
    • A Faraday effect current sensor uses a plurality of concatenated field sensors, with a single light source and a single detector. At least two Faraday effect sensing elements (single mode sensing fibers) are used, preferably at least three, the sensing elements being interconnected by fusion spliced, polarizing fibers. The sensing fibers may be oriented generally straight, and arranged to form a regular polygon, e.g., an equilateral triangle for a three-element sensor. The locations of the splices between the sensing fibers and the polarizing fibers may further be advantageously arranged such that the sensing fibers form a substantially closed path which may be placed about the current-carrying conductor. The linearity of the sensor response may be improved by selecting an appropriate value of the bias angle of each sensing element, optimally equal to arctan�1/.sqroot.(2n-1)! where n is the number of sensing elements. The present invention may also be adapted for use as a differential current sensor wherein each sensing element is housed in a separate package allowing the elements to be placed about different conductors at a Y-branch, or about a single conductor at different locations.
    • 法拉第效应电流传感器使用多个级联场传感器,具有单个光源和单个检测器。 使用至少两个法拉第效应感测元件(单模感测光纤),优选地至少三个,感测元件通过熔接的偏振光纤相互连接。 感测纤维可以大致直线定向,并且被布置成形成用于三元件传感器的正多边形,例如等边三角形。 感测纤维和偏振光纤之间的接头的位置可以进一步有利地布置成使得感测纤维形成基本上封闭的路径,其可以放置在载流导体周围。 可以通过选择每个感测元件的偏置角的适当值来最佳地等于arctan [1 / 2ROOT(2n-1)],其中n是感测元件的数量,可以改善传感器响应的线性。 本发明还可以适用于差分电流传感器,其中每个感测元件容纳在单独的封装中,允许将元件放置在Y分支处的不同导体周围,或者在不同位置处围绕单个导体放置。
    • 9. 发明授权
    • Fiber optic current sensor with bend birefringence compensation
    • 具有弯曲双折射补偿的光纤电流传感器
    • US5729005A
    • 1998-03-17
    • US683519
    • 1996-07-12
    • Trevor W. MacDougallJay W. DawsonLeonard A. Johnson
    • Trevor W. MacDougallJay W. DawsonLeonard A. Johnson
    • G01R15/24G02F1/01
    • G01R15/246
    • A fiber optic subassembly for a Faraday-effect current sensor has an optical sensing fiber supported by a tubular holder in a square or rectangular configuration, with the three of the four corners thereof designed with bends which have a net zero bend-induced birefringence. The bends are formed by providing two loops which have effective angles of about 90.degree., the two loops lying in orthogonal planes, such that the fast axis of birefringence in the first loop is parallel to the slow axis of birefringence in the second loop, and the slow axis of birefringence in the first loop is parallel to the fast axis of birefringence in the second loop. In this manner, retardance accumulated in the first loop is offset by retardance accumulated in the second loop. If the loops are substantially identical, the offsetting of the retardance is effectively complete such that the bend exhibits negligible bend-induced birefringence.
    • 用于法拉第效应电流传感器的光纤子组件具有由正方形或矩形配置的管状支架支撑的光学感测光纤,其四个角中的三个角部设计有具有零零弯曲引起的双折射的弯曲。 通过提供两个有效角度约为90°的回路形成弯曲,两个回路位于正交平面中,使得第一回路中双折射的快轴平行于第二回路中双折射的慢轴,以及 第一回路中双折射的慢轴平行于第二回路中双折射的快轴。 以这种方式,在第一回路中累积的延迟被第二回路中累积的延迟所抵消。 如果环基本相同,则延迟的抵消有效地完成,使得弯曲显示可忽略的弯曲引起的双折射。