| 电涡流传感器温度漂移分析及补偿实现 |
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| 引用本文： | 樊树江,吴峻,杨光,常文森.电涡流传感器温度漂移分析及补偿实现[J].传感技术学报,2004,17(3):427-430. |
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| 作者姓名： | 樊树江 吴峻 杨光 常文森 |
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| 作者单位： | 国防科技大学磁悬浮技术研究中心,长沙,410073;国防科技大学三院机电工程研究所,长沙,410073 |
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| 摘 要： | 大温差环境下检测线圈阻抗是导致传感器输出漂移的主要环节.对检测线圈阻抗温度漂移进行了理论分析,电阻温度漂移改变了阻抗,间隙对传感器温度灵敏度的影响很小,即不同间隙下温度漂移量认为是相同的.提出对检测线圈进行串联负温度系数(NTC)电阻补偿,并采用修正表算法来减小检测线圈带来的温度漂移.对漂移补偿后的传感器进行了实验验证.
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| 关 键 词： | 电涡流传感器 温度漂移补偿 检测线圈 NTC 修正表算法 |
| 文章编号： | 1004-1699(2004)03-0427-04 |
| 修稿时间： | 2004年4月22日 |
Temperature Drift Analysis and Compensation on Eddy Current Sensor |
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| FAN Shujiang,WU Jun,YANG Guang,CHANG Wensen.Temperature Drift Analysis and Compensation on Eddy Current Sensor[J].Journal of Transduction Technology,2004,17(3):427-430. |
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| Authors: | FAN Shujiang WU Jun YANG Guang CHANG Wensen |
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| Affiliation: | FAN Shu-jiang1,WU Jun1,YANG Guang2,CHANG Wen-sen11. Res. Ctr. of Maglev Techn.,National University of Defense Technology,Changsha 410073,China, 2. Res. of Mechatronics and Automation,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | Temperature drift of eddy current sensor(ECS) mainly results from the impedance of measurement coil under great variation in temperature. The coil impedance drift was analyzed theoretically. The resistance drift changes the impedance and the gap less affects the temperature sensitivity, i.e. the output drift was considered the same at different gap. Resistance with negative temperature coefficient was in series to decrease the drift, and a table-checking algorithm was adopted further to treat this problem. The compensated ECS was proved experimentally. |
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| Keywords: | NTC |
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