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公开(公告)号：US20160305984A1
公开(公告)日：2016-10-20
申请号：US15187442
申请日：2016-06-20
申请人： ABB Technology AG
发明人： Klaus Bohnert , Andreas Frank , Georg Müller , Lin Yang
IPC分类号： G01R15/24
CPC分类号： G01R15/245 , G01R15/247
摘要： A method of increasing accuracy of optical sensors based on generating two sets of light waves having different velocities in the presence of a non-vanishing measurand field within a sensing element of the sensor is described. A defined static bias phase shift is introduced between the two sets of light waves. The sensor converts a total optical phase shift including static bias optical phase shifts and measurand-induced optical phase shifts into anti-phase optical power changes in at least two detector channels. The method includes steps of normalizing the optical power changes after their conversion into electrical detector signals in the two detector channels to reduce effects of uneven intensity or power of the light source and different loss or gain in the detector channels. Further methods, sensors and apparatus for temperature stabilizing such optical sensors and novel sensors are also presented.
摘要翻译： 描述了在传感器的感测元件内存在不消失的被测量场的情况下，基于产生具有不同速度的两组光波提高光学传感器精度的方法。 在两组光波之间引入定义的静态偏置相移。 传感器将包括静态偏置光学相移和被测量的光相移的总光学相移转换成至少两个检测器通道中的反相光功率变化。 该方法包括在将光功率变化转换成两个检测器通道中的电检测器信号之后归一化光功率变化的步骤，以减少光源的不均匀强度或功率的影响以及检测器通道中的不同损耗或增益。 还提出了用于温度稳定这种光学传感器和新型传感器的其它方法，传感器和装置。
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公开(公告)号：US09983236B2
公开(公告)日：2018-05-29
申请号：US15187442
申请日：2016-06-20
申请人： ABB Technology AG
发明人： Klaus Bohnert , Andreas Frank , Georg Müller , Lin Yang
CPC分类号： G01R15/245 , G01R15/247
摘要： A method of increasing accuracy of optical sensors based on generating two sets of light waves having different velocities in the presence of a non-vanishing measurand field within a sensing element of the sensor is described. A defined static bias phase shift is introduced between the two sets of light waves. The sensor converts a total optical phase shift including static bias optical phase shifts and measurand-induced optical phase shifts into anti-phase optical power changes in at least two detector channels. The method includes steps of normalizing the optical power changes after their conversion into electrical detector signals in the two detector channels to reduce effects of uneven intensity or power of the light source and different loss or gain in the detector channels. Further methods, sensors and apparatus for temperature stabilizing such optical sensors and novel sensors are also presented.
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公开(公告)号：US20160377660A1
公开(公告)日：2016-12-29
申请号：US15187522
申请日：2016-06-20
申请人： ABB Technology AG
发明人： Georg Müller , Klaus Bohnert , Andreas Frank , Philippe Gabus
CPC分类号： G01R15/241 , G01R15/246 , G01R15/247 , G01R19/32
摘要： A fiber optic sensor and related method are described, with the sensor including a cross-coupling element in the optical path between a polarizing element and a sensing element, but separated from the sensing element itself; with the cross-coupling element generating a defined cross-coupling between the two orthogonal polarization states of the fundamental mode of a polarization maintaining fiber guiding light from the light source to the sensing element thus introducing a wavelength-dependent or temperature-dependent sensor signal shift to balance wavelength-dependent or temperature-dependent signal shifts due to other elements of the sensor, particularly signal shifts due to the wavelength dependence of the Faraday effect or the electro-optic effect constant.
摘要翻译： 描述了光纤传感器和相关方法，其中传感器包括在偏振元件和感测元件之间的光路中的交叉耦合元件，但是与感测元件本身分离; 交叉耦合元件在从光源到感测元件的保持光纤的基波模式的两个正交极化状态之间产生定义的交叉耦合，从而引入依赖于波长或依赖于温度的传感器信号 以平衡由于传感器的其他元件导致的波长依赖或温度依赖的信号偏移，特别是由于法拉第效应或电光效应常数的波长依赖性引起的信号偏移。
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公开(公告)号：US10247761B2
公开(公告)日：2019-04-02
申请号：US15187522
申请日：2016-06-20
申请人： ABB Technology AG
发明人： Georg Müller , Klaus Bohnert , Andreas Frank , Philippe Gabus
摘要： A fiber optic sensor and related method are described, with the sensor including a cross-coupling element in the optical path between a polarizing element and a sensing element, but separated from the sensing element itself; with the cross-coupling element generating a defined cross-coupling between the two orthogonal polarization states of the fundamental mode of a polarization maintaining fiber guiding light from the light source to the sensing element thus introducing a wavelength-dependent or temperature-dependent sensor signal shift to balance wavelength-dependent or temperature-dependent signal shifts due to other elements of the sensor, particularly signal shifts due to the wavelength dependence of the Faraday effect or the electro-optic effect constant.
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