| 离轴抛物面镜在温度传感器校准系统中的应用 |
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| 引用本文： | 江练勇,郝晓剑,周汉昌. 离轴抛物面镜在温度传感器校准系统中的应用[J]. 激光技术, 2012, 36(1): 42-44. DOI: 10.3969/j.issn.1001-3806.2012.01.012 |
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| 作者姓名： | 江练勇 郝晓剑 周汉昌 |
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| 作者单位： | 1.中北大学仪器科学与动态测试教育部重点实验室, 太原 030051 |
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| 摘 要： | 为了改善温度传感器动态校准系统中的晶体透镜对激光束的聚焦效果,使用离轴90°抛物面镜代替晶体透镜对系统进行了改造,通过几何光学方法,对离轴90°抛物面镜应用于激光聚焦光路时的光轴的角度失准对聚焦光斑造成的影响进行了分析,并利用改进后的系统对CHAL-010型热电偶进行时间常数测试和动态校准实验,得到了CHAL-010型热电偶在温度阶跃为242℃左右时的时间常数值,完成了该热电偶的动态校准.结果表明,采用离轴90°抛物面镜代替温度传感器动态校准系统中的晶体透镜能达到温度传感器动态校准的目的.
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| 关 键 词： | 测量与计量 传感器动态校准系统 动态校准 离轴抛物面镜 热电偶 |
| 收稿时间： | 2011-04-11 |
Application of off-axis parabolic mirrors in temperature sensor calibration systems |
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| JIANG Lian-yong , HAO Xiao-jian , ZHOU Han-chang. Application of off-axis parabolic mirrors in temperature sensor calibration systems[J]. Laser Technology, 2012, 36(1): 42-44. DOI: 10.3969/j.issn.1001-3806.2012.01.012 |
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| Authors: | JIANG Lian-yong HAO Xiao-jian ZHOU Han-chang |
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| Affiliation: | (Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education,North University of China,Taiyuan 030051,China) |
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| Abstract: | In order to improve focusing effect of the crystalline lens on the laser beam in a temperature sensor dynamic calibration system, a 90° off-axis parabolic mirror was used instead of the crystalline lens. The influence of the misalignment angle of the 90° off-axis parabolic mirror on the focused laser spot was studied according to geometrical optics. Utilizing the improved system, the CHAL-010-type thermocouple’s time constant at step temperature around 242℃ was tested and the dynamic calibration experiment was carried out. The results show that the new system reconstructed with the 90° off-axis parabolic mirror can fulfill the dynamic calibration of temperature sensors. |
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| Keywords: | measurement and metrology sensor dynamic calibration system dynamic calibration off-axis parabolic mirror thermocouple |
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