摘要
为解决现有的太赫兹墙体钢筋系统在多根并排钢筋检测时,由于相邻钢筋反射信号的串扰而导致无法测量的问题,提出了一种基于太赫兹波的墙体内多根并排钢筋的检测方法。通过在太赫兹源前加装可调透镜组,达到在钢筋埋深处聚焦波束的效果,解决太赫兹波束同时照射到相邻两根钢筋产生混叠影响测量的问题;同时利用改进的直径计算算法,实现存在埋深差的并排钢筋的检测。实验结果表明:在水泥埋深40mm,并排钢筋间隔25mm时,测量误差小于0.5mm,并且相邻钢筋在埋深差40mm(最浅埋深40mm)的情况下,测量误差小于1mm。
In the Terahertz wall detection system, a detection method based on Terahertz wave is presented to solving the existing problem that due to the crosstalk of reflected signals of adjacent steel bars when multiple steel bars are side by side. The problem of overlapping influence measurement is caused by Terahertz beam illuminating two adjacent steel bars, which is solved by installing a focus beam with adjustable lens group in front of the Terahertz source. What is more, the improved algorithm is used to detect the side-by-side steel bars buried at different depth. The results reveal that the measurement error is less than 0.5 mm when the cement depth is 40 mm and the distance between two side-by-side steel bars is 25 mm. The measurement error is also less than 1 mm when the adjacent steel bars have a depth difference of 40 mm.
作者
张全盛
袁明辉
ZHANG Quansheng;YUAN Minghui(Optoelectronic Information and Computer Engineering,University of Shanghai for Science&Technology College,Shanghai 310110,China)
出处
《光学技术》
CAS
CSCD
北大核心
2021年第3期288-292,298,共6页
Optical Technique
