公开(公告)号：US5500909A

公开(公告)日：1996-03-19

申请号：US191587

申请日：1994-02-04

申请人： Markus Meier

发明人： Markus Meier

IPC分类号： G01R15/24 ,  G02B6/255 ,  G02B6/00 ,  G01J4/00 ,  G01R31/00

CPC分类号： G01R15/246 ,  G02B6/2551

摘要： The sensor head (1) is intended for a fiberoptic current measuring device. It exhibits a twisted low-birefringence LB fiber (14) which is guided around a current conductor (2) and serves to conduct polarized light. Using the LB fiber (14), the Faraday rotation of the polarized light, which rotation is generated by the magnetic field (H) of the current (J) to be measured, is detected. The LB fiber (14) is spliced at its two ends in each instance with one of two polarization-conserving, light-conducting HB fibers (6, 7), one (6) of which supplies the polarized light. The two HB fibers (6, 7) are secured in each instance in the vicinity of the two splice locations (19, 20) with the absorption of the torsional force generated by the twisting of the LB fiber (14).In spite of having a simple and sturdy structure, the sensor head (1) is distinguished by a high degree of measurement accuracy.

摘要翻译： 传感器头（1）用于光纤电流测量装置。 它呈现扭转的低双折射LB纤维（14），其被引导绕电流导体（2）并且用于传导偏振光。 使用LB光纤（14），检测由待测电流（J）的磁场（H）产生的偏振光的法拉第旋转。 LB纤维（14）在其两端分别以两个偏振保护的导光HB光纤（6,7）中的一个接合，其中一个（6）提供偏振光。 两个HB纤维（6,7）在每个情况下都固定在两个接合位置（19,20）附近，同时吸收由LB纤维（14）的扭转产生的扭转力。 尽管具有简单且坚固的结构，传感器头（1）的高度的测量精度也被区分开来。

公开(公告)号：US5471546A

公开(公告)日：1995-11-28

申请号：US354809

申请日：1994-12-13

申请人： Markus Meier

发明人： Markus Meier

IPC分类号： G01C19/72 ,  G01D5/353 ,  G01N21/21 ,  G01N21/41 ,  G01R15/24 ,  G01C19/64 ,  G02B6/17

CPC分类号： G01R15/246 ,  G01D5/344 ,  G01D5/35351

摘要： Fiber-optic sensors are used in reflection or transmission operation in almost all fields of measuring technology, inter alia for monitoring industrial installations, in medical diagnostics and in aerospace. In this context, the effects of mechanical, electrical, magnetic, acoustic, thermal and chemical signals are evaluated. In order to make possible a simpler signal evaluation, laser light from a light source is coupled into a feed line optical fiber parallel to one of its two principal axes. At a 1st splice point, the light is introduced into a 1st reference optical fiber, whose principal axes are rotated with respect to those of the feed line optical fiber by 45.degree.. At a 2nd splice point, the light reaches a 2nd reference optical fiber of the same length as the 1st reference optical fiber and with its principal axes rotated with reference to the 1st reference optical fiber by 90.degree.. At a 3rd splice point, the light is coupled into a low-birefringent optical fiber, which firstly forms a .lambda./4-fiber-optic loop and subsequently forms an optical sensor. By means of a phase modulator (M) in conjunction with the 1st reference optical fiber, the phase shift of the light can be influenced statically or dynamically.

摘要翻译： 光纤传感器几乎用于测量技术的各个领域，用于反射或传输操作，特别是用于监测工业设备，医疗诊断和航空航天。 在这方面，评估了机械，电，磁，声，热和化学信号的影响。 为了使得更简单的信号评估成为可能，来自光源的激光被耦合到平行于其两个主轴之一的馈线光纤中。 在第一个拼接点，将光引入第一个参考光纤，其主轴相对于馈线光纤旋转45度。 在第二个接合点处，光到达与第一个参考光纤相同长度的第二个参考光纤，其主轴相对于第一个参考光纤旋转90°。 在第三拼接点，光被耦合到低双折射光纤中，其首先形成λ/ 4光纤环路并随后形成光学传感器。 通过与第一参考光纤结合的相位调制器（M），可以静态地或动态地影响光的相移。