| 基于混合电动势型 SO2传感器的研制及接口电路设计 |
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| 引用本文： | 张洋,王永刚,夏金峰.基于混合电动势型 SO2传感器的研制及接口电路设计[J].长春工程学院学报(自然科学版),2016,17(2):34-38. |
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| 作者姓名： | 张洋 王永刚 夏金峰 |
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| 作者单位： | 福建信息职业技术学院电子工程系,福州,350000;福建海源新材料科技有限公司,福建 建阳,354200;中国科学院上海硅酸盐研究所,上海,200050 |
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| 基金项目： | 福建省教育厅中青年教师教育科研项目(JA15673) |
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| 摘 要： | 利用钠离子的快速离子导体固体电解质为离子导电层,NaRe(SO4)2稀土硫酸钠复盐为敏感电极,设计并研制了一种混合电动势型 SO2传感器核心元件。在实验室条件下的非平衡态气氛中,对此核心元件进行了二氧化硫体积分数的敏感性能测试。根据传感器的检测原理及输出信号特性,设计了微弱信号检测电路,由此组装成 SO2气体传感器器件。结果表明：在低温260~300℃下,该传感器对 SO2的灵敏度为136.4 mV 左右,具有较高的选择性和良好的响应恢复特性,器件耐潮湿,测试时不需要参比气体。该器件输出的稳定可靠的标准电压信号,可被单片机直接读取。
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| 关 键 词： | 混合电动势 SO2 气体传感器 微弱信号检测 电路设计 |
The Fabrication of Mixed Potential SO2 Sensor and Its Interface Circuit Design |
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| Abstract: | In this paper,SO2 gas sensor based on NASICON as the lon conducting layer and with NaRe (SO4 )2 as the sensing materials has been fabricated,A mixed potential type SO2 sensor core component was designed and developed.This core component has been used to test the concentration of SO2 under labora-tory conditions of non-equilibrium atmosphere.Detection circuit of the SO2 gas sensor for weak signal has been designed based on the measuring principle of sensor and the characteristics of output signal,and the SO2 gas sensor devices are assembled.The results show that the sensor has high selectivity,good reponse recovery characteristics,resistance to moisture and need not a reference gas when the working temperature was 260 ℃ to 300 ℃ with the ideal sensitivity was about 136.4 mV.The sensor can also output stable and reliable standard voltage signal and can be read by the signal microcontroller directly. |
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| Keywords: | mixed potential SO2 gas sensor detection for weak signal cricuit design |
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