基于单传感器补偿融合的农药检测系统设计

发布时间：2018-04-13 06:25

本文选题：传感器 + 农残检测　；参考：《中国激光》2016年01期

【摘要】：针对当前用于农药残留的现场检测仪器存在检测时间长、重复性差及抗温光干扰能力有限等不足,基于酶抑制法结合前置光路补偿及数据融合算法设计了一种稳定、可用于现场检测的便携式农药残留检测系统。该系统主要包括吸光度感知模块和信号数据融合调理模块。吸光度感知模块在样品水浴恒温前提下,增加前置补偿检测光路,降低温度及杂光信号干扰;数据融合调理模块将经光电转化及电路采集的信号分组融合,增强信号真实性。测试表明,该传感器系统具有良好的稳定性与重复性(相对标准偏差小于2.5%),补偿光路的引入有效降低了外界光干扰。经实验证实抑制率高于70%的样品验证率达85%,且抑制率高于50%时不同农药检出浓度均在0.5~5.0 mg/kg范围内,满足现场检测需求。
[Abstract]:In view of the shortcomings of the current field detection instruments for pesticide residues, such as long detection time, poor repeatability and limited ability to resist thermal light interference, a kind of stability was designed based on enzyme inhibition method combined with pre-light path compensation and data fusion algorithm.Portable pesticide residue detection system for field detection.The system mainly includes absorbance sensing module and signal data fusion conditioning module.Under the premise of constant temperature of sample water bath, absorbance sensing module increases pre-compensation detection light path to reduce temperature and miscellaneous signal interference; data fusion conditioning module fuses the signals collected by photoelectric conversion and circuit to enhance the authenticity of the signal.The test results show that the sensor system has good stability and repeatability (the relative standard deviation is less than 2.5), and the introduction of compensating optical path can effectively reduce the external optical interference.The experimental results showed that the verification rate of the samples with inhibition rate of more than 70% was 85%, and when the inhibition rate was higher than 50%, the detectable concentrations of different pesticides were within the range of 0.5 ~ 5.0 mg/kg, which could meet the requirements of field detection.
【作者单位】：中国科学院合肥智能机械研究所智能农业与环境监测研究室;中国科学技术大学信息学院;
【基金】：国家863计划(2013AA102302) 国家科技支撑项目(2012BAJ24B02)
【分类号】：X839.2;TP212.9

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