公开(公告)号：US5416860A

公开(公告)日：1995-05-16

申请号：US296600

申请日：1994-08-29

申请人： Yen-Zen Lee ,  K. Roger Lee

发明人： Yen-Zen Lee ,  K. Roger Lee

IPC分类号： G01R15/24 ,  G01R33/032

CPC分类号： G01R15/246 ,  G01R33/0322

摘要： A system for measuring the strength of fiber optical current in an AC magnetic field by adopting Faraday effect and temperature compensation. In general, the current measurement systems that adopt Faraday effect have the structure including a Faraday element, a polarizer and an analyzer. When a light beam is directed through the Faraday element, the plane of polarization rotates according to the strength of induced magnetic field and Verdet constant in the Faraday element. The rotation affects the optical intensity sensed by the analyzer. The variation on light intensity after passing through the analyzer is converted into an electric current by a optical-electric transducer. But the accuracy of this system this system always affected by the ambient environment, wherein the major factor is the thermal effect of Verdet constant. This invention utilizes thermo-optical sensing device to sense the temperature variation in Faraday element, and furthermore utilizes the sensed variation as means of compensation to regulate the process of current measurement so that will not be affected by ambient temperature.

摘要翻译： 采用法拉第效应和温度补偿测量交流磁场中光纤电流强度的系统。 通常，采用法拉第效应的当前测量系统具有法拉第元件，偏振器和分析器的结构。 当光束穿过法拉第元件时，偏振平面根据法拉第元件中的感应磁场强度和Verdet常数旋转。 旋转影响分析仪检测到的光强度。 通过分析仪后的光强变化通过光电换能器转换成电流。 但是这个系统的准确性，这个系统总是受周围环境的影响，其中主要因素是Verdet常数的热效应。 本发明利用热光感测装置来感测法拉第元件中的温度变化，并且还利用感测的变化作为补偿的方式来调节电流测量的过程，从而不受环境温度的影响。

公开(公告)号：US5920667A

公开(公告)日：1999-07-06

申请号：US909759

申请日：1997-08-12

申请人： Kuo-Tung Tiao ,  Yen-Zen Lee ,  Wen-Chin Lin ,  Victor Hwang ,  Yeh Jin Ching

发明人： Kuo-Tung Tiao ,  Yen-Zen Lee ,  Wen-Chin Lin ,  Victor Hwang ,  Yeh Jin Ching

IPC分类号： G02B6/32 ,  G02B6/35 ,  G02B6/38

CPC分类号： G02B6/3504 ,  G02B6/32 ,  G02B6/3558

摘要： A switch device with a spiral mechanism for optical fiber is disclosed for improved reliablility. It includes: (a) a plurality of non-rotatable optical fibers, each having first end and second ends, the first end of each the non-rotatable optical fiber being provided with a parallel convergent lens, the second end of each the non-rotatable optical fiber being provided with a connector to connect an interface for receiving an optical signal; the plurality of the non-rotatable optical fibers being fixed on a circular fixture; (b) a rotatable optical fiber having first and second ends, wherein the first end of the rotatable optical fiber passes through a fixture hole, and connected with connector for receiving a optical signal, while the second end of the rotatable optical fiber being fixed to a motor; and (c) a spiral pipe made of a rigid material being sleeved on a portion of the rotatable optical fiber between the first and second ends The second end of the rotatable optical fiber is arranged such that it can be connected to the first end of one of the non-rotatable optical fibers without contact to form into a coupling channel within an angular scope of 360 degrees.

摘要翻译： 公开了一种具有用于光纤的螺旋机构的开关装置，用于改善可靠性。 它包括：（a）多个不可旋转的光纤，每个具有第一端和第二端，每个不可旋转的光纤的第一端设置有平行会聚透镜，每个非可旋转光纤的第二端， 可旋转光纤设置有连接器以连接用于接收光信号的接口; 多个不可旋转的光纤被固定在圆形夹具上; （b）具有第一端和第二端的可旋转光纤，其中可旋转光纤的第一端通过固定孔，并与用于接收光信号的连接器连接，而可旋转光纤的第二端被固定到 电机 和（c）由刚性材料制成的螺旋管，套在第一和第二端之间的可旋转光纤的一部分上。可旋转光纤的第二端被布置成使得其可连接到第一端的第一端 的不可旋转的光纤，而不会在360度的角度范围内形成耦合通道。