殷勇,周秋香,于慧春,肖涛.有机磷农药气敏传感阵列检测信号小波包降噪方法[J].农业机械学报,2011,42(4):144-147.
Yin Yong,Zhou Qiuxiang,Yu Huichun,Xiao Tao.Wavelet Packet Denoising Method of Gas Sensor Array Signals for Detecting Organophosphorus Pesticides in Vegetables[J].Transactions of the Chinese Society for Agricultural Machinery,2011,42(4):144-147.
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有机磷农药气敏传感阵列检测信号小波包降噪方法   [下载全文]
Wavelet Packet Denoising Method of Gas Sensor Array Signals for Detecting Organophosphorus Pesticides in Vegetables   [Download Pdf][in English]
  
DOI:10.3969/j.issn.1000-1298.[year].[issue].[sequence]
中文关键词:  农药残留  电子鼻  小波包  降噪
基金项目:河南省基础与前沿技术研究计划资助项目(092300410039)
作者单位
殷勇 河南科技大学 
周秋香 河南科技大学 
于慧春 河南科技大学 
肖涛 河南科技大学 
中文摘要:针对有机磷农药气敏传感阵列测试信号含有噪声,严重影响测试结果准确性与可靠性这一问题,选择辛硫磷和乙酰甲胺磷农药残留为研究对象,采用基于小波包分解与重构的气体传感阵列信号降噪方法,并借助主成分分析(PCA)和Fisher判别分析(FDA),分别研究了信号降噪前后两种农药不同质量比的鉴别情况。结果表明:传感阵列信号降噪后两种农药的不同残留样品均能被鉴别区分。小波包降噪可有效地提高气敏传感阵列对蔬菜农药残留的鉴别效果。
Yin Yong  Zhou Qiuxiang  Yu Huichun  Xiao Tao
Henan University of Science and Technology;Henan University of Science and Technology;Henan University of Science and Technology;Henan University of Science and Technology
Key Words:Pesticide residues  Gas sensor array  Wavelet packet  Denoising
Abstract:For the white noise always embeds in signals of gas sensor array, there must be bad influence on the accuracy and reliability of test results while micro or trace organophosphorus pesticide residues in vegetables detection. To solve the problem, acephate and phoxim were selected as test object. A denoising method of gas sensor array signals based on wavelet packet decomposition and reconstruction was practiced. With the help of principal component analysis (PCA) and Fisher discriminant analysis (FDA), the identification results of different concentrations corresponding to the two kinds of pesticide residues were explored and compared, respectively. The results showed that the different concentrations samples corresponding to acephate and phoxim were all well discriminated after the gas sensor array signals treated by the wavelet packet denoising. Therefore, the wavelet packet denoising method could improve identification effect of pesticide residues in vegetables using gas sensor array.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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