激光技术, 2017, 41 (6): 841, 网络出版: 2017-11-27  

基于双波段对数比放大的热风炉拱顶测温系统

Temperature measurement systems for stove domes based on a dual band log ratio amplification
作者单位
安徽工业大学 电气与信息工程学院, 马鞍山 243032
摘要
为了解决传统热风炉拱顶测温系统存在的维护难度大、发射率难以确定等问题, 采用了双波段对数比放大测温方法, 并对其进行了理论推导和实验验证。结果表明,在设定温度不变的前提下, 该方法的测量结果与随着时间改变的温度几乎保持一致; 并验证了设定温度与测量温度之间的关系, 本系统测温误差绝对值在6℃以内, 测量精度高; 也验证了LOG112输出电压与真实温度的倒数呈线性关系, 这与理论推导一致。该研究将辐射测温与对数比放大技术相结合, 对于解决现存问题及提高拱顶测温精度具有重要意义。
Abstract
In order to solve the problems of difficult maintenance and emissivity determination of the traditional stove dome temperature measurement system, a method of dual band log ratio amplification temperature measurement was adopted. After theoretical deduction and experimental verification, the results show that, under the premise of setting the temperature unchanged, the measurement results of this method are almost consistent with the temperature with the change of time. The relationship between the setting temperature and measurement temperature is also verified. The absolute error of temperature measurement is less than 6℃,with high measurement accuracy. It is also verified that the output voltage of LOG112 is linearly related to the reciprocal of the actual temperature and it is consistent with the theoretical deduction. The study combines radiation thermometry with logarithmic amplification, and it is of great significance to solve the existing problems and improve the temperature measurement accuracy of vault.

方挺, 王怀, 陆柯顺, 王彦, 欧阳强强. 基于双波段对数比放大的热风炉拱顶测温系统[J]. 激光技术, 2017, 41(6): 841. FANG Ting, WANG Huai, LU Keshun, WANG Yan, OUYANG Qiangqiang. Temperature measurement systems for stove domes based on a dual band log ratio amplification[J]. Laser Technology, 2017, 41(6): 841.

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