基于多元非线性拟合方法的碳硫分析仪检测系统  

Detecting system of carbon-sulfur analyzer based on multiple nonlinear regression method

作　　者：黄海军[1] 王桥医[1] 朱瑶[1] 高瑞进[1] 

机构地区：[1]杭州电子科技大学机械工程学院,浙江杭州310018

出　　处：《机电工程》2011年第10期1199-1202,共4页Journal of Mechanical & Electrical Engineering

基　　金：浙江省大学生科技创新活动计划(新苗人才计划)资助项目(2011R407047)

摘　　要：为了满足对金属材料中碳硫元素含量的高精度和高灵敏度分析的需求,设计了高频红外碳硫分析仪。阐述了高频红外碳硫分析仪的结构和工作原理,并详细论述了检测系统的结构设计。通过采用高灵敏度红外热释电传感器、超窄带滤光片、表面镀金的特征光锥等设计,并将光锥与灵敏元真空封装在一起,减少了干扰气体成分的影响,提高了碳硫分析仪的检测灵敏度。采用多元非线性拟合方法,分析了一系列一定范围含量的标准样品,并做线性化定标处理,实现了碳硫分析在检测范围内非常高的线性度。研究结果表明该检测系统工作性能稳定,高频红外碳硫分析仪具有极高的灵敏度和精度,而且分析速度快。In order to analyze the content of carbon and sulfur elements in the metallic materials precisely and sensitively, a high-frequency infrared carbon-sulfur analyzer was designed. The structure and operating principle of high-frequency infrared carbon-sulfur analyzer was described, and the detecting subsystem was elaborated. The sensitivity of carbon-sulfur analyzer was improved by using pyroelectric infrared sensors, ultra-narrow band pass filter, light-cone with surface of gold-plated and other key technologies. And the light-cone was vacuum packaged with the sensitive element to reduce the influence of interfering gases. The high linearity of carbon-sulfur analysis was readized in the detection range, through using multiple nonlinear regression method to analyze a series of standard samples, and processing the data by linear calibration. The research results show that the detecting system performance is stably and high-frequency infrared carbon-sulfur analyzer can analyze the content of carbon and sulfur elements in the metallic materials rapidly with high sensitivity and precision.

关 键 词：碳硫分析 红外吸收 检测系统 多元非线性拟合 灵敏度 

分 类 号：TH715[机械工程—测试计量技术及仪器]