Experimental Analysis of Terahertz Detection of Polyethylene Thickness
In the manufacturing process of polyethylene material pipelines,accurate measurement of pipe thickness is an important technical problem affecting the quality of pipeline production.In the process of terahertz non-metal thickness transmission measurement,the optical path time difference and material refractive index of two transmitted signals are measured.The sample thickness parameter is obtained.In this paper,the thickness error detection calibration of the test sample is firstly carried out,then the stepwise Butterworth bandpass filter is applied to the time domain signal,and the optimal filter interval is determined by the signal to noise ratio calculation formula,and the closest frequency of different samples is selected.The distribution interval is used as a basis for selecting the effective range of the refractive index.The experimental results show that the measurement accuracy is significantly improved,and the measurement error is significantly reduced.
terahertz refractive index measurement error error calibration
Jiang Qiang Yu Yue Liu Zuoshi Huao Yuan
Jiangxi University of Science and Technology,Jiangxi,341000,China China Special Equipment Inspection Institute,Beijing,100029,China
国际会议
浙江宁波
英文
41-47
2019-07-06（万方平台首次上网日期，不代表论文的发表时间）