基于太赫兹波时域光谱的纸页定量检测新方法

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.

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

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 ba...