水质油污染原位传感器稳定性设计

发布时间：2018-05-12 19:32

本文选题：水质监测 + 油污染　；参考：《传感技术学报》2017年11期

【摘要】：由于受光源不稳、环境光干扰、标准曲线非线性及沾污的影响,传感器的稳定性表现不佳。为此,基于紫外荧光测量原理,分别从结构、工艺及算法3个方面做了优化设计。光路设计中引入了参比检测,ZEMAX软件仿真结果显示"十"字光路可行。聚四氟乙烯、光学镀膜的采用及电刷设计可有效防止油污粘附及生物附着。遮光罩为传感器营造一个检测暗腔,有效解决了环境光干扰问题。实验表明:传感器测量样品时,荧光信号的变异系数0.3%。以浓度30μg/L为例,模拟光强衰减时荧光信号的变异系数为1.28%。样品浓度为62.4μg/L时,扩展不确定度为0.256μg/L(k=2)。传感器的稳定性设计取得了较理想的成果,但距离实际应用还有差距,主要是浊度、温度等影响因子未引入到算法修正模型中。
[Abstract]:Due to the instability of the light source, the environmental light interference, the nonlinear and contamination of the standard curve, the stability of the sensor is not good. Based on the ultraviolet fluorescence measurement principle, the optimization design is made from 3 aspects of the structure, process and algorithm. The design of the optical path is introduced, and the results of the ZEMAX software simulation show that the "ten" light path is feasible. Polytetrafluoroethylene (polytetrafluoroethylene), the use of optical coating and the brush design can effectively prevent oil fouling and biological attachment. The shade cover creates a dark chamber for the sensor to effectively solve the environmental light interference. The experiment shows that when the sensor is measuring the sample, the coefficient of variation of the fluorescence signal is 0.3%. An example of the concentration of 30 mu g/L is used to simulate the fluorescence attenuation. The variation coefficient of the signal is that the concentration of 1.28%. sample is 62.4 u g/L, and the expansion uncertainty is 0.256 g/L (k=2). The stability design of the sensor has achieved satisfactory results, but there is still a gap between the actual application and the turbidity, and the influence factors such as temperature are not introduced into the algorithm correction model.

【作者单位】：山东省科学院海洋仪器仪表研究所;山东省海洋环境监测技术重点实验室;
【基金】：国家重点研发计划项目(2016YFC1400803,2016YFC1400804) 山东省优秀中青年科学家科研奖励基金目(BS2014HZ015)
【分类号】：X853

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