吹扫式仿生嗅觉检测装置的设计与性能试验

发布时间：2018-04-16 23:04

本文选题：传感器 + 检测　；参考：《农业工程学报》2017年08期

【摘要】：为研究仿生嗅觉检测装置的检测性能,该文研制了一种吹扫式仿生嗅觉检测装置,选取传感器阵列灵敏度、响应时间和恢复时间作为装置性能指标,分析了传感器加热电压、待检气体湿度以及流量等控制参数对嗅觉检测性能的影响,并进一步验证优化控制参数的仿生嗅觉检测装置对气味检测的可行性和检测性能。试验结果表明:传感器阵列灵敏度随加热电压增大而增大,其响应和恢复时间随加热电压增大而减小,加热电压为5.0 V时,装置性能较佳,其传感器阵列灵敏度分布范围为2.260~4.823,响应和恢复时间分布范围分别为46~53 s、44~70 s;增加气体湿度会使传感器阵列灵敏度减小,同时也会延长响应和恢复时间,气体相对湿度为30%时,装置性能较佳;传感器阵列灵敏度随载气流量的增加先递增后减小,其响应和恢复时间随流量的增加先减小后递增,流量为100 m L/min时,装置性能较佳,其传感器阵列灵敏度分布范围为2.853~7.559,响应和恢复时间分布范围分别为35~50 s、30~50 s;在优化控制参数下,待检气体体积分数范围控制在0.002%~0.020%时,装置检测灵敏度较高,范围为3 577.1~6 700.7;线性特性和重复性较好,决定系数范围为0.901~0.997,变异系数范围为0.832%~9.696%,能满足仿生嗅觉气味检测的要求,可为后续开展仿生嗅觉的应用性研究提供数据参考与技术支撑。
[Abstract]:In order to study the detection performance of bionic olfactory detection device, a blow sweep bionic olfactory detector is developed in this paper. The sensor array sensitivity, response time and recovery time are selected as the performance indexes, and the heating voltage of the sensor is analyzed.The effects of gas humidity and flow rate on the olfactory detection performance were investigated, and the feasibility and performance of bionic olfactory detection device with optimized control parameters were verified.The experimental results show that the sensitivity of the sensor array increases with the increase of the heating voltage, and the response and recovery time decrease with the increase of the heating voltage. When the heating voltage is 5.0 V, the performance of the device is better.The sensitivity distribution range of the sensor array is 2.260 ~ 4.823, and the distribution range of response and recovery time is 46 ~ 53 s-1 ~ 4470 s, respectively. Increasing gas humidity will decrease the sensitivity of sensor array, and also prolong the response and recovery time. When the gas relative humidity is 30, the sensitivity of the sensor array will be decreased.The sensitivity of the sensor array increases first and then decreases with the increase of the flow rate, and the response and recovery time decrease first and then increase with the increase of the flow rate. When the flow rate is 100m L/min, the performance of the device is better.The sensitivity distribution range of the sensor array is 2.853 ~ 7.559, and the distribution range of response and recovery time is 35 ~ 50 ~ 30 ~ 50 s, respectively. Under the optimized control parameters, when the volume fraction of the gas to be detected is controlled in the range of 0.002 ~ 0.020, the detection sensitivity of the device is relatively high.The range of linearity and reproducibility is good, the range of determining coefficient is 0.901 ~ 0.997, and the range of variation coefficient is 0.832 ~ 9.696, which can meet the requirements of bionic olfactory smell detection, and can provide data reference and technical support for further application research of bionic olfactory.
【作者单位】：中南林业科技大学机电工程学院;
【基金】：国家自然科学基金(31401281) 湖南省自然科学基金(14JJ3115) 湖南省高校科技创新团队支持计划(2014207) 湖南省科技计划重点研发项目(2016NK2151)
【分类号】：TP212

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