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非制冷热像仪内部温升对测温精度的影响修正

张艳超 高策 刘建卓 王博 杨帅

张艳超, 高策, 刘建卓, 王博, 杨帅. 非制冷热像仪内部温升对测温精度的影响修正[J]. 中国光学(中英文), 2018, 11(4): 669-676. doi: 10.3788/CO.20181104.0669
引用本文: 张艳超, 高策, 刘建卓, 王博, 杨帅. 非制冷热像仪内部温升对测温精度的影响修正[J]. 中国光学(中英文), 2018, 11(4): 669-676. doi: 10.3788/CO.20181104.0669
ZHANG Yan-chao, GAO Ce, LIU Jian-zhuo, WANG Bo, YANG Shuai. Correction of temperature measurement accuracy affected by internal temperature rise in uncooled thermal imager[J]. Chinese Optics, 2018, 11(4): 669-676. doi: 10.3788/CO.20181104.0669
Citation: ZHANG Yan-chao, GAO Ce, LIU Jian-zhuo, WANG Bo, YANG Shuai. Correction of temperature measurement accuracy affected by internal temperature rise in uncooled thermal imager[J]. Chinese Optics, 2018, 11(4): 669-676. doi: 10.3788/CO.20181104.0669

非制冷热像仪内部温升对测温精度的影响修正

doi: 10.3788/CO.20181104.0669
基金项目: 

国家仪器重大专项 No.2013YQ140517

详细信息
    作者简介:

    张艳超(1985-), 女, 吉林长春人, 博士, 副研究员, 2007年、2009年于天津大学分别获得学士、硕士学位, 2015年于中国科学院大学获得博士学位, 主要从事红外辐射测温及数字图像处理方面的研究。E-mail:zhangyanchaomn@126.com

  • 中图分类号: TN219

Correction of temperature measurement accuracy affected by internal temperature rise in uncooled thermal imager

Funds: 

National Majot Instrument Project of China No.2013YQ140517

More Information
  • 摘要: 随着非制冷型热像仪工作时间的增长,其内部器件、机械结构所积累的热量越来越多,其温升所导致的热辐射势必会对热像仪的测温精度产生严重影响。因此,要实现热像仪的准确测温,必须对其内部的各温升影响因素进行相应的修正。本文通过对影响测温精度的镜筒辐射温度、探测器靶面温度以及热像仪工作累积时间三个因素进行评估和建模,并对其相互关系进行评价,根据数据模型对热像仪辐射测温值进行修正。结果表明,在实验室条件下,经过修正,非制冷型红外热像仪测温精度可控制在±1℃以内,其稳定性可控制在±0.5℃以内。修正后的温度结果基本不受内部温升的影响,有效的提高了非制冷测温型热像仪的稳定性、可重复性以及测温精度。

     

  • 图 1  热像仪组成框图

    Figure 1.  Block diagram of thermal imager

    图 2  FPA、镜筒温度—时间曲线

    Figure 2.  Temperatures of FPA and lens vary with tube-time

    图 3  灰度-FPA、镜筒温度曲线

    Figure 3.  Gray level-temperatures of FPA and lens tube curves

    图 4  FPA校正前

    Figure 4.  Before the correction of FPA temperature

    图 5  FPA校正后

    Figure 5.  After the correction of FPA temperature

    图 6  黑体温度为30 ℃时整体温度走势

    Figure 6.  Temperature trend curve when temperature of black body is set to 30 ℃

    图 7  黑体温度为30 ℃时放大温度走势

    Figure 7.  Amplified temperature trend curve when temperature of black body is set to 30 ℃

    图 8  测试系统示意图

    Figure 8.  Diagram of the testing system

    图 9  测试系统实物图

    Figure 9.  Actual picture of the testing system

    表  1  20 ℃至90 ℃范围内测量结果(单位:℃)

    Table  1.   Measurement results in the range of 20 ℃ to 90 ℃(unit: ℃)

    设定值20.025.030.035.040.0
    均值19.925.330.034.940.2
    最小19.525.129.834.740.1
    最大20.225.430.335.440.4
    设定值45.050.055.060.065.0
    均值44.750.255.060.064.7
    最小44.650.154.859.664.6
    最大44.950.255.260.164.9
    设定值70.075.080.085.090.0
    均值70.175.080.285.090.2
    最小69.974.980.184.990.1
    最大70.275.180.485.190.3
    下载: 导出CSV

    表  2  20 ℃至90 ℃范围内稳定性结果(单位:℃)

    Table  2.   Stabilization in the range of 20 ℃ to 90 ℃(unit: ℃)

    设定值20.025.030.035.040.0
    稳定性±0.35±0.15±0.25±0.35±0.15
    设定值45.050.055.060.065.0
    稳定性±0.15±0.05±0.2±0.25±0.15
    设定值70.075.080.085.090.0
    稳定性±0.15±0.1±0.15±0.1±0.1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-11-21
  • 修回日期:  2018-01-20
  • 刊出日期:  2018-08-01

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