| 4线制测温原理在气象地温数据观测中的应用 |
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| 引用本文： | 吴奇生,华连生,陈斌.4线制测温原理在气象地温数据观测中的应用[J].电子测量技术,2010,33(8):86-88. |
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| 作者姓名： | 吴奇生 华连生 陈斌 |
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| 作者单位： | 安徽省大气探测技术保障中心,合肥,230031 |
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| 摘 要： | 自动气象观测中所用地温传感器PT100有很好的温度-阻值线性关系。基于这一线性关系,介绍了4线制测温原理,它不但消除了地温传感器引线对测量精度的影响,而且还可以精确测量出地温传感器的阻值。再通过辅助控制电路,一个4线制测量通道可以测量多个地温数据。在投入运行的气象自动观测产品都是运用了4线制测温原理去测量地温,运行结果和实验室检定结果表明4线制测温原理能满足气象规范对地温测量精度的要求。
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| 关 键 词： | 4线制测温 恒流源 放大 A/D变换 |
Application of the principle of four-wire measuring temperature in meteorological soil temperature observation |
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| Wu Qisheng,Hua Liansheng,Chen Bin.Application of the principle of four-wire measuring temperature in meteorological soil temperature observation[J].Electronic Measurement Technology,2010,33(8):86-88. |
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| Authors: | Wu Qisheng Hua Liansheng Chen Bin |
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| Affiliation: | Wu Qisheng Hua Liansheng Chen Bin (The Centre of Atmosphere Detection and Maintenance of Anhui,Hefei 230031) |
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| Abstract: | The relation between temperature and resistance of soil temperature sensor PT100 is very linear.The paper introduces the principle of four-wire measuring temperature base on the linear relation.It can remove the effect of soil temperature sensor wire resistance and measure accurately the resistance of sensor.One four-wire measuring temperature channel can measure much soil temperature with auxiliary circuits.The principle of four-wire measuring temperature is applied in all operating automatic observation products.The actual results and the calibration results in lab can achieve the requirements of soil temperature measuring precision about meteorological specification. |
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| Keywords: | four-wire measuring temperature constant ampere power amplify A/D transfer |
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