| 基于AD7745的数字式油品检测传感器设计 |
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| 引用本文： | 刘海仓,滕召胜,刘静波,熊海涛,罗彬. 基于AD7745的数字式油品检测传感器设计[J]. 传感器与微系统, 2011, 30(9): 95-97,101 |
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| 作者姓名： | 刘海仓 滕召胜 刘静波 熊海涛 罗彬 |
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| 作者单位： | 1. 湖南大学电气与信息工程学院,湖南长沙,410082
2. 长沙高新开发区仪奇测控技术有限公司,湖南长沙,410082 |
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| 基金项目： | 科学技术部科技型中小企业技术创新基金资助项目(08026214302169) |
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| 摘 要： | 植物油掺伪后难以检测,根据不同油品具有不同介电常数的特性,设计了通过电容值进行检测的数字式油品传感器,建立了传感器等效电路,分析了传感器结构对电容检测的影响。传感器为插杆状结构,平板电容极板为敏感元件,检测时不同油品介质引起的电容量变化经AD7745转换成相应的数字量通过I2C串行总线口输出。实验结果表明:数字式油品传感器能够对掺伪3%以上的植物油进行快速有效鉴别,重复性优于0.2%。
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| 关 键 词： | 植物油 掺伪检测 电容传感器 AD7745 |
Design of digital sensor for oil quality detection based on AD7745 |
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| LIU Hai-cang,TENG Zhao-sheng,LIU Jing-bo,XIONG Hai-tao,LUO Bin. Design of digital sensor for oil quality detection based on AD7745[J]. Transducer and Microsystem Technology, 2011, 30(9): 95-97,101 |
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| Authors: | LIU Hai-cang TENG Zhao-sheng LIU Jing-bo XIONG Hai-tao LUO Bin |
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| Affiliation: | LIU Hai-cang1,TENG Zhao-sheng1,LIU Jing-bo2,XIONG Hai-tao1,LUO Bin1(1.School of Electrical and Information Engineering,Hunan University,Changsha 410082,China,2.Changsha High-tech Development Zone,YiQi Measurement and Control Technology Corporation,China) |
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| Abstract: | It's difficult to detect whether the edible vegetable oil is adulteration.According to the characteristics that one kind of oil's permittivity is different from others,a capacitive sensor is designed for oil quality detection.The equivalent circuit of the sensor is established to analyze the impact of sensor structure on capacitance detection.The sensor is rod-shaped,and the probe of plate capacitor is sensing unit.The AD7745 chip is used to detect the capacitance change due to different oil quality acting ... |
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| Keywords: | edible vegetable oil adulteration detection capacitive sensor AD7745 |
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