公开(公告)号：US09983236B2

公开(公告)日：2018-05-29

申请号：US15187442

申请日：2016-06-20

Applicant: ABB Technology AG

Inventor： Klaus Bohnert ,  Andreas Frank ,  Georg Müller ,  Lin Yang

IPC: G01D5/353 ,  G01R15/24

CPC classification number: G01R15/245 ,  G01R15/247

Abstract: 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.

公开(公告)号：US20160305984A1

公开(公告)日：2016-10-20

申请号：US15187442

申请日：2016-06-20

Applicant: ABB Technology AG

Inventor： Klaus Bohnert ,  Andreas Frank ,  Georg Müller ,  Lin Yang

IPC: G01R15/24

CPC classification number: G01R15/245 ,  G01R15/247

Abstract: 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.

Abstract translation: 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。