| 一种热电偶测量仪表的校准方法 |
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| 引用本文： | 孔繁军,戴晶,潘婧.一种热电偶测量仪表的校准方法[J].舰船科学技术,2012,34(8):109-111,118. |
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| 作者姓名： | 孔繁军 戴晶 潘婧 |
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| 作者单位： | 中国船舶重工集团公司第七一九研究所,湖北武汉,430064 |
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| 摘 要： | 提出了一种热电偶测量仪表的校准方法.采用Labview软件和高精度模拟输出板卡相结合的方法,将温差转化为0～5V的直流电压输出,将不同类型的热电偶分度表拟合出函数关系,用于纠正热电偶产生的热电动势和温差之间非严格线性关系,然后通过外部模拟运算电路将板卡输出电压转化为标准热电偶的温差电动势输出,可以实现多种类型热电偶测量仪表在不同使用温度范围的校准.经过数据测试及分析,输出的温差电动势均在允许的误差范围内,且操作简便,能很方便地用于热电偶测量仪表的校准.
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| 关 键 词： | 热电偶 校准 Labview 温差电动势 |
Research on the thermocouple instrument calibration method |
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| KONG Fan-jun
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DAI Jing
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PAN Jing.Research on the thermocouple instrument calibration method[J].Ship Science and Technology,2012,34(8):109-111,118. |
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| Authors: | KONG Fan-jun DAI Jing PAN Jing |
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| Institution: | (The 719 Research Institute of CSIC,Wuhan 430064,China) |
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| Abstract: | Introduced a method of the thermocouple instrument calibration.Using of Labview and high precision analog output card,the computer can translate the temperature difference into the 0 ～ 5V DC voltage output,and form the function relation from a variety of types of thermocouple degree,which is used to modify non-strict linear function of thermocouple EMF and temperature difference.Then the outside analog circuit translate the 0 ～ 5V voltage into the EMF.This method can achieve the thermocouple instrument calibration for a variety of types of thermocouple and range of temperature.According to data test and analysis,all errors of output EMF are acceptable,the method is easy operated and can be used for thermocouple instrument calibration. |
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| Keywords: | thermocouple calibration Labview EMF |
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