共查询到18条相似文献,搜索用时 140 毫秒
1.
2.
随着电子计算机及传感技术的发展,仿生电子鼻逐渐进入人们的视野.仿生电子鼻是模仿动物嗅觉系统,通过被探测物与传感器发生氧化还原等化学反应,并造成电子器件的响应从而检测出特定物质.近年来,经济的快速发展,带动了人员、物资的大量流动,随之带来的还有复杂的安保环境,因此也提高了对危险品检测技术的要求.仿生电子鼻因其灵敏度高、体积小、质量轻、成本低等优势,正逐渐代替大型安保检测仪器,同时也在各种传感技术领域被广泛关注,具有广阔的应用前景.本文对仿生电子鼻在爆炸物检测,易挥发、有毒、有害化合物检测,毒品检测等方面的研究进展进行综述,并展望了仿生电子鼻的未来发展趋势. 相似文献
3.
4.
5.
6.
7.
8.
9.
口臭对人们的社交互动和生活质量产生严重的负面影响,当前对口臭的诊断方法难以在个人及家庭中应用.本文通过采集口臭病人样本,建立了基于GC-MS技术检测口气中VSCs的标准化流程,采用ROC曲线分析方法确定了不同感官评分的VSCs浓度范围.在此基础上,研制了一套基于电化学传感器并结合卷积神经网络模型的电子鼻,用于口臭标志物检测和口臭等级的判别.该电子鼻对硫化氢和甲硫醇的检出限分别为39×10-9和48×10-9.通过与GC-MS检测结果比较,该电子鼻检测实际临床样本中VSCs的平均相对误差为11.4%,识别口臭等级的正确率达到80%,表明该电子鼻可以满足口臭分级检测的临床要求,具有良好的应用前景. 相似文献
10.
鉴于目前安检设备无法检测一些具有挥发性的有毒有害或易燃、易爆液态危险品。利用电子鼻气味识别的功能,将X射线检测技术与电子鼻气味识别技术有机的结合起来,分析了箱体容积内运动气体的流动特性,并确定电子鼻的位置分布及数量,实验表明:该方法对挥发性的有毒有害或易燃、易爆液态危险品检测的概率达到85%,电子鼻技术的应用克服X射线检测仪识别物质不全面的缺点,实现了对危险品的全面检测,提高了安检仪的性能。 相似文献
11.
12.
13.
14.
《Sensors and actuators. B, Chemical》2006,113(1):347-353
Over the past years, electronic nose technology opened the possibility to exploit information on behavior aroma to assess fruit ripening stage. The objective in this study was to evaluate the capacity of electronic nose to monitoring the change in volatile production of mandarin during different picking-date, using a specific electronic nose device (PEN 2). Principal component analysis (PCA) and linear discriminant analysis (LDA) were used in order to investigate whether the electronic nose was able to distinguish among different picking-date (ripeness states). The loadings analysis was used to identify the sensors responsible for discrimination in the current pattern file. The results obtained prove that the electronic nose PEN 2 can discriminate successfully different picking-date on mandarin using LDA analysis. But, electronic nose was not able to detect a clear difference in volatile profile on mandarin using PCA analysis. During external validation using LDA was obtained to classified 92% of the total samples properly. Some sensors have the highest influence in the current pattern file for electronic nose PEN 2. A subset of few sensors can be chosen to explain all the variance. This result could be used in further studies to optimize the number of sensors. 相似文献
15.
A novel humid electronic nose combined with an electronic tongue for assessing deterioration of wine 总被引:2,自引:0,他引:2
Luis Gil-SánchezAuthor Vitae Juan SotoAuthor Vitae Ramón Martínez-MáñezAuthor Vitae Eduardo Garcia-BreijoAuthor Vitae Javier IbáñezAuthor Vitae Eduard LlobetAuthor Vitae 《Sensors and actuators. A, Physical》2011,171(2):152-158
We report herein the use of a combined system for the analysis of the spoilage of wine when in contact with air. The system consists of a potentiometric electronic tongue and a humid electronic nose. The potentiometric electronic tongue was built with thick-film serigraphic techniques using commercially available resistances and conductors for hybrid electronic circuits; i.e. Ag, Au, Cu, Ru, AgCl, and C. The humid electronic nose was designed in order to detect vapours that emanate from the wine and are apprehended by a moist environment. The humid nose was constructed using a piece of thin cloth sewn, damped with distilled water, forming five hollows of the right size to introduce the electrodes. In this particular case four electrodes were used for the humid electronic nose: a glass electrode, aluminium (Al), graphite and platinum (Pt) wires and an Ag-AgCl reference electrode. The humid electronic nose together with the potentiometric electronic tongue were used for the evaluation of the evolution in the course of time of wine samples. Additionally to the analysis performed by the tongue and nose, the spoilage of the wines was followed via a simple determination of the titratable (total) acidity. 相似文献
16.
17.