激光制造中双光谱测温法发射率的补偿优化  

Emissivity compensation for double-band pyrometry in laser manufacturing

作　　者：姚建华[1,2] 苗建民[1,2] 戴连奎[3] 叶诗豪[1,2] 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,杭州310014 [2]浙江工业大学激光加工技术工程研究中心,杭州310014 [3]浙江大学工业控制技术国家重点实验室,杭州310027

出　　处：《强激光与粒子束》2011年第12期3287-3291,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(50971117)

摘　　要：为进一步提高温度测量精度,以激光照射下普通钢的熔池为研究对象,通过对发射率模型的合理假设,实现了双光谱测温系统的补偿优化。测量结果显示,针对普通钢的温度测量时,发射率采用指数模型可以取得很好的测量效果,测量误差在4%以内。同时,在同一种测量条件下将优化后的测温法与传统的比色法测温进行精度比较,证实与比色法相比该方法的误差显著减少。通过对数据处理的误差做定量分析,得出其误差在13～25℃之间。In order to improve measurement accuracy,a double-band pyrometric method based on emissivity compensation has been proposed for steel under laser irradiation.With exponential models as emissivity model,the measurement errors are below 4%.Meanwhile the comparison between the traditional double-band method and this method has been conducted,and the precision of this method is obviously higher.The quantitative analysis of data processed by this method shows that,the calculation errors are between 13 ℃ and 25 ℃.

关 键 词：激光技术 高温测量 发射率模型 普朗克公式 

分 类 号：O436[机械工程—光学工程]