| 一种实用的热电阻测温方法 |
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| 引用本文： | 黄江平. 一种实用的热电阻测温方法[J]. 科技广场, 2005, 0(1): 124-125 |
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| 作者姓名： | 黄江平 |
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| 作者单位： | 华东交通大学电气与电子工程学院,南昌,330013 |
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| 摘 要： | 热电阻具有测温范围大、稳定性好和耐氧化等特点，低温测量中占有重要的地位。本文介绍了一种利用8031单片机并采用热电阻进行温度测量的硬件电路及软件设计方法，利用恒流源和12位A／D转换器设计温度测量电路，完全消除了传统的不平衡电桥的非线性误差，减小热电阻的接触电阻和引线电阻对测量误差影响。在程序存储器EPROM中存放电阻一温度分度表．被测温度是通过软件查表及公式计算得到的。该方法具有简单、实用、测量精度高、抗干扰能力强等特点。
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| 关 键 词： | 热电阻 不平衡电桥 测量电路 接触电阻 分度表 引线电阻 放电 软件设计方法 程序存储器 公式计算 |
| 文章编号： | 1671-4792-(2005)01-0024-02 |
a Practical Method of Temperature Measurement with Thermal Resistance |
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| Huang Jiangpin. a Practical Method of Temperature Measurement with Thermal Resistance[J]. Science Mosaic, 2005, 0(1): 124-125 |
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| Authors: | Huang Jiangpin |
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| Abstract: | Thermal resistance is characterized by having large range of temperature measurement,stability and anti-oxidation etc .It is important position in low temperature measurement. Thehardware circuits, using 8031 single-chip microcomputer and thermal resistance for temperaturemeasurement, and software design are introduced in this paper. In order to eliminate non-linearityerror of tradition imbalance electric bridge, contact resistance and down-lead resistance, thetemperature measurement circuit is designed with constant current source and 12 bits A/D convertor.The resistance- temperature table is put into EPROM. Measurement temperature is obtained throughinquiring program and calculating. This method has many characteristics such as simplicity,practicality, high precision, strong anti-interference etc. |
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| Keywords: | thermal resistance temperature measurement single-chip microcomputer |
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