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海洋用NTC热敏电阻温度计校准方法探索

李婷 汪洪军 孙建平 郝小鹏 王成科 于娇

李婷,汪洪军,孙建平,等. 海洋用NTC热敏电阻温度计校准方法探索[J]. 计量科学与技术,2021, 65(5): 55-61 doi: 10.12338/j.issn.2096-9015.2020.9027
引用本文: 李婷,汪洪军,孙建平,等. 海洋用NTC热敏电阻温度计校准方法探索[J]. 计量科学与技术,2021, 65(5): 55-61 doi: 10.12338/j.issn.2096-9015.2020.9027
LI Ting, WANG Hongjun, SUN Jianping, HAO Xiaopeng, WANG Chengke, YU Jiao. Exploration of Calibration Methods for Ocean NTC Thermistor Thermometers[J]. Metrology Science and Technology, 2021, 65(5): 55-61. doi: 10.12338/j.issn.2096-9015.2020.9027
Citation: LI Ting, WANG Hongjun, SUN Jianping, HAO Xiaopeng, WANG Chengke, YU Jiao. Exploration of Calibration Methods for Ocean NTC Thermistor Thermometers[J]. Metrology Science and Technology, 2021, 65(5): 55-61. doi: 10.12338/j.issn.2096-9015.2020.9027

海洋用NTC热敏电阻温度计校准方法探索

doi: 10.12338/j.issn.2096-9015.2020.9027
基金项目: 中国计量科学研究院基本科研业务费重点领域(26-AKYZD2004-3)
详细信息
    作者简介:

    李婷(1990-),中国计量科学研究院博士后、助理研究员,研究方向:温度计量,邮箱:liting@nim.ac.cn

    通讯作者:

    汪洪军(1978-),中国计量科学研究院高级工程师,研究方向:温度计量,邮箱:whj@nim.ac.cn

    孙建平(1980-),中国计量科学研究院副研究员,研究方向:温度计量,邮箱:sunjp@nim.ac.cn

Exploration of Calibration Methods for Ocean NTC Thermistor Thermometers

  • 摘要: 应对海洋温度高精度测量需求,结合国家温度基准水三相点和镓熔点装置对海洋用国产负温度系数(NTC)热敏电阻元件长期稳定性进行考察,通过引入等温热管技术的恒温槽并采用“瞬时比较法”对NTC热敏电阻温度计进行校准方法探索。结果表明,经过筛选的国产NTC热敏电阻元件稳定性可达到海洋领域所需水平;常规封装工艺易导致NTC热敏电阻温度计稳定性下降,进行多次热循环是提高其稳定性的有效手段;校准点数量和分布对校准水平具有较大影响;存在高性能温度计在各点校准偏差很小且几乎不受选点分布影响。研究结果有助于建立NTC热敏电阻温度计评测方法和控制标准,为海洋测温领域计量体系发展指明方向。
  • 图  1  NTC热敏电阻温度计校准装置

    Figure  1.  Calibration device for NTC thermistor thermometers

    图  2  NTC热敏电阻元件半年稳定性考察结果

    Figure  2.  Test results of the half-year stability of NTC thermistor elements

    图  3  NTC热敏电阻元件两次校准结果相对偏差

    Figure  3.  Relative difference between two calibration results of NTC thermistor elements

    图  4  未经热循环NTC热敏电阻温度计两次校准偏差

    Figure  4.  Relative difference between two calibration results of the NTC thermistor thermometers without a thermal cycle

    图  5  经过多次热循环NTC热敏电阻温度计两次校准结果

    Figure  5.  Relative difference between two calibration results of the NTC thermistor thermometers after thermal cycles

    图  6  4点(−5 ℃, 5 ℃, 25 ℃, 35 ℃)校准结果

    Figure  6.  Calibration results of the NTC thermistor thermometers by using 4 points (−5 ℃, 5 ℃, 25 ℃, 35 ℃)

    图  7  5点(−5 ℃, 0, 15 ℃, 25 ℃, 35 ℃)校准结果

    Figure  7.  Calibration results of the NTC thermistor thermometers by using 5 points (−5 ℃, 0, 15 ℃, 25 ℃, 35 ℃)

    图  8  6点(−5 ℃, 0, 10 ℃, 20 ℃, 30 ℃, 35 ℃)校准结果

    Figure  8.  Calibration results of the NTC thermistor thermometers by using 6 points (−5℃, 0, 10℃, 20 ℃, 30 ℃, 35 ℃)

    图  9  NTC热敏电阻温度计4点校准选点组合校准结果对比 (a)NTC2020021 (b)NTC2020045

    Figure  9.  Comparison of calibration results of the NTC thermistor thermometers by using different groups of 4 measurement points (a)NTC2020021 (b)NTC2020045

    表  1  NTC热敏电阻温度计校准不确定度

    Table  1.   Calibration uncertainties of NTC thermistor thermometers

    不确定度来源标准不确定度/mK
    多次测量重复性0.15
    恒温槽稳定性0.11
    恒温槽均匀性0.11
    SPRT校准不确定度0.30
    合成标准不确定度0.37
    扩展不确定度0.8(k=2)
    下载: 导出CSV

    表  2  4点校准不同选点统计结果

    Table  2.   Statistical result of NTC thermistor thermometers calibration by using four measurement points

    排序选点分布NTC数量
    1−55253568
    2−50203565
    3−55203563
    4−50253561
    5−510203560
    6−510253560
    7−515203557
    805253557
    9−515253556
    10010253556
    下载: 导出CSV

    表  3  5点校准不同选点统计结果

    Table  3.   Statistical result of NTC thermistor thermometers calibration by using five measurement points

    排序选点分布NTC数量
    1−5015253579
    2−5015303577
    3−5010253576
    4−5015203571
    5−5010303570
    6−5020253570
    7−5020303570
    8−5515303570
    9−5515253568
    10−5520303565
    下载: 导出CSV

    表  4  6点校准不同选点统计结果

    Table  4.   Statistical result of NTC thermistor thermometers calibration by using six measurement points

    排序选点分布NTC数量
    1−5010203035115
    2−505203035110
    3−5010253035107
    4−5010153035106
    5−5015203035106
    6−505153035103
    7−5010202535101
    8−50520253599
    9−50515253598
    10−501525303597
    下载: 导出CSV
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出版历程
  • 网络出版日期:  2021-05-10
  • 刊出日期:  2021-06-24

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