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浙江大学学报（农业与生命科学版）
浙江大学学报(农业与生命科学版)  2013, Vol. 39 Issue (5): 582-590    DOI: 10.3785/j.issn.1008-9209.2013.03.122
农业工程     
无线电子鼻的研制和远程监测应用
胡莹， 王俊*
（浙江大学生物系统工程与食品科学学院，农业部设施农业装备与信息化重点实验室，杭州310058）
Development of wireless electronic nose and using of remote monitoring
HU Ying, WANG  Jun*
(Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Ministry of Agriculture, School  of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China)
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摘要： 设计并实现了基于无线传感网络的无线电子鼻系统，该系统包括用于采集数据的监测节点、用于ZigBee网络组织与数据汇聚的协调器节点和用于数据存储和处理的远程管理系统。在系统完成后，对其通信性能进行测试，然后将之运用于水果李子存放过程的检测。在恒定温度湿度下，每天测2次，连续检测5 d。运用PCA（principal component analysis，主成分分析）能够大概得出李子变化趋势，而运用BP（back propagation，神经网络）可较准确地判定各样品所属阶段。最后选取2种SVM（support vector machine，支持向量机）方案分别对样品训练集和测试集的识别率进行计算。结果表明，选用主成分分析后的特征向量进行SVM分析有较好的识别率，说明本实验设计的无线电子鼻系统能够运用于水果新鲜度的远程监测。
Abstract: The electronic nose system is the simulation of mammalian olfactory system, to identify or classify the fruits according to odor. The traditional electronic noses commonly use  the expensive card for data acquisition, which leads to the increased cost, meanwhile the existence of wired access need high maintenance cost and the extensible system defects and mobility are poor, especially it can’t detect in real-time in harmful environment. To solve the above problems, a kind of electronic nose system was put forward which has eight  wireless data transmission based on ZigBee, and when the monitoring nodes have been arranged, nobody is needed to visit the scene. The system combined the latest wireless sensor networks. The past research about it was focused on little road data or information transmission control, but rarely on multi-channel data transmission. With sensors and synchronous transport signal increasing, we should pay attention to data accuracy and packet loss rate. This system used the CC2530 chip for 8-way wireless data transmission. The system included  a monitoring node of the data acquisition, a coordinator node for organization and data aggregation of ZigBee and remote management system for data storage and processing. The system can set multiple monitoring nodes and monitor the object of several places through the network at the same time which is convenient and cost saving. Firstly, a wireless electronic nose system was designed based on ZigBee technology to detect the level of fruit freshness and food spoilage. The system included a monitoring node of the data acquisition, a coordinator node for organization and data aggregation of ZigBee and remote management system for data storage and processing. The hardware and software components of the system were designed. The hardware part included selection of the components, structure and principle of graph nodes, in order to ensure the realization of the system. It focused on the design of data acquisition and processing module, power module, the interface circuit design, antenna impedance matching design of wireless communication module. The software introduces the structure of Z-Stack plate on the transplant, CC2530 data acquisition, AD（Analog to digital） conversion process and the development of the applications for the eight  channel data acquisition and transmission, to ensure the accuracy of data transmission. Secondly, the communication quality of the system was evaluated and applied to detect the plum fruits. Plum samples were tested in 5 days (twice per day) at a certain temperature and humidity, using principal component analysis which can probably show the plum change trend, and the use of BP neural network can accurately determine the growth stage of each sample. The SVM analysis had  a good recognition rate using eigenvector analysis after PCA. The experiments showed that the wireless electronic nose could  be used for remote monitoring of fresh fruits. In all, wireless electronic nose system based on ZigBee is cost saving, convenient and flexible, also has good scalability and mobility with a good application prospect. At the same time, selecting the appropriate pattern recognition algorithm can make the system more accurate.
出版日期: 2013-09-20
CLC:  TP 277  
基金资助:

国家科技支撑计划资助项目(2012BAD29B02-4)；国家自然科学基金资助项目(31071548)。
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胡莹
王俊*

引用本文:

胡莹， 王俊*. 无线电子鼻的研制和远程监测应用[J]. 浙江大学学报(农业与生命科学版), 2013, 39(5): 582-590.

HU Ying, WANG Jun*. Development of wireless electronic nose and using of remote monitoring. Journal of Zhejiang University (Agriculture and Life Sciences), 2013, 39(5): 582-590.

链接本文:

http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2013.03.122    或    http://www.zjujournals.com/agr/CN/Y2013/V39/I5/582

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