基于太赫兹波时域光谱的纸页定量检测新方法(英文)  

NEW METHOD FOR PAPER BASIS WEIGHT MEASUREMENT BASED ON TERAHERTZ TIME DOMAIN SPECTROSCOPY

作　　者：曹丙花[1] 张光新[2] 周泽魁[2] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008 [2]浙江大学工业控制技术国家重点实验室,浙江大学控制系,杭州浙江310027

出　　处：《红外与毫米波学报》2009年第4期241-245,共5页Journal of Infrared and Millimeter Waves

基　　金：Supported by the National Natural Science Foundation of China(60774054);the Ph. D. Programs Foundation of Ministry of Education of China(2007335123)

摘　　要：纸页的定量值是纸页的重要参数之一,此参数的测量对造纸过程具有重要意义.但这个问题到目前并未得到很好解决.太赫兹时域光谱是一种新发展起来的基于飞秒激光技术的光谱测量技术,目前已被初步应用于很多其它领域.本文研究应用太赫兹波时域光谱技术进行纸页定量测量的可行性.提出了两种方法,一种是基于太赫兹信号幅度衰减,另一种是基于太赫兹信号的延迟时间,并比较了两种方法的性能.实验结果表明基于延迟时间方法的线性性能优于基于幅度的方法.给出了这两种方法的相对误差,结果再次表明基于延迟时间的性能优于基于幅度衰减的方法.研究表明应用太赫兹波信号的延迟时间进行纸页定量检测是可行的,此方法有可能为纸页定量检测提供一种新的解决方法.Measurement of basis weight which is one of the most important physical indexes of paper sheet is of decisive importance in paper making process. However, this problem has not been well solved so far. Terahertz time domain spectroscopy is a newly developed spectroscopy technique based on femtosecond laser technology, and has been studied in some other research fields. The purpose of this work is to study the feasibility of applying terahertz time-domain spectroscopy technique to the measurement of paper sheet basis weight. Two principles were presented in this study. One was based on terahertz amplitude attenuation and the other was on terahertz delay time. Experiments were carried out to verify the theoretical analysis and compare the performances of these two proposed principles. The experimental results show that delay-time-based method is better than amplitude-attenuation-based method in terms of linearity and accuracy. The research work indicates that the method based on terahertz delay time is feasible for paper basis weight measurement. And it may provide a new solution for paper basis weight measurement.

关 键 词：太赫兹波 时域光谱 定量(单位面积纸的重量) 相对误差 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] O434.3[自动化与计算机技术—控制科学与工程]