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首页> 外文期刊>Sensors and Actuators, A. Physical >A fiber link equipment for the optical rotation measuring based on AC-DC modulation magneto-optical effect
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A fiber link equipment for the optical rotation measuring based on AC-DC modulation magneto-optical effect

机译：一种基于交直流调制磁光效应的旋光测量光纤链路设备

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摘要

Based on the magnetic-optical effect, an alternating current-direct current (AC-DC) two-stage modulation is applied in the newly developed equipment, which measures the concentration of solution through the optical rotation of optical active substance. A Faraday coil is combined with the AC-DC signal generator controlled by a pulse width modulation controller. To deduct the measuring error caused by the AC modulation or the DC modulation, a two-stage method based on the Superposition of DC component and AC component is demonstrated, which is characterized by removing the interference of the bigger magnetic rotation angle in the AC modulation alone. The tartaric acid, glucose, and sucrose sugar solutions are taken as the standard examples in testifying the equipment. A linear correlation is found between the measured optical rotation angle and the concentration of the solution, with the optical rotation angle being within a 1% margin of error and the maximum relative error smaller than 0.005 g/ml. The results show that the equipment has the advantage of high precision, high integration, and strong anti interference capacity. The fiber link makes the equipment portable and compact. The AC-DC two-stage modulation equipment can potentially be used in the optical rotation measurement. (C) 2016 Elsevier B.V. All rights reserved.
机译：基于磁光效应，在新开发的设备中应用了交流直流电（AC-DC）两阶段调制，该设备通过旋光性物质的旋光来测量溶液的浓度。法拉第线圈与由脉冲宽度调制控制器控制的AC-DC信号发生器结合在一起。为了减少由交流调制或直流调制引起的测量误差，提出了一种基于直流分量和交流分量叠加的两阶段方法，其特征在于消除了交流调制中较大的磁旋转角的干扰。单独。酒石酸，葡萄糖和蔗糖溶液被用作证明设备的标准实例。在测得的旋光角和溶液浓度之间发现线性相关，旋光角在误差的1％范围内，最大相对误差小于0.005 g / ml。结果表明，该设备具有精度高，集成度高，抗干扰能力强的优点。光纤链路使设备便携式且紧凑。 AC-DC两级调制设备可以潜在地用于旋光度测量。 （C）2016 Elsevier B.V.保留所有权利。

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