激光扫描终端信息化光谱数据稳态滤波技术  

Steady State Filtering Technology of Information Spectral Data in Laser Scanning Terminal

作　　者：杜静[1] 罗永莲[2] Du Jing;Luo Yonglian(Electronic Information System,Jinzhong Vocational&Technical College,Jinzhong,Shanri 030600,China;Network Information Centerof Jinzhong University,Jinzhong,Shanzi 030619,China)

机构地区：[1]晋中职业技术学院电子信息系,山西晋中030600 [2]晋中学院网络信息中心,山西晋中030619

出　　处：《应用激光》2022年第10期140-145,共6页Applied Laser

基　　金：山西省教育科学“十三五”规划课题(GH-18091);山西省激光装备创业创新共同体(JGKS-N-002)。

摘　　要：针对激光扫描过程中因人为干扰和设备缺陷等因素产生的噪声,提出基于激光扫描终端信息化的光谱数据稳态滤波技术进行有效去除。根据激光扫描系统组成结构和终端信息化流程,确定扫描过程中噪声来源,在光束发散、扫描角度和设备缺陷等因素影响下建立光谱数据噪声模型;经过小波变换,将初始信号分解为低频与高频两部分;综合软阈值和硬阈值函数描述小波分解后光谱数据变化趋势,设定滤波阈值函数,实现噪声过滤。仿真分析表明,所提技术能够有效提高光谱信号信噪比,滤波后的信号与真实信号之间的均方根误差最小。Aiming at the noise caused by human interference and equipment defects in the process of laser scanning, a steady-state filtering technology of spectral data based on the informatization of laser scanning terminal is proposed to effectively remove the noise. According to the composition structure of the laser scanning system and the information process of the terminal, the noise source in the scanning process is determined, and the spectral data noise model is established under the influence of factors such as beam divergence, scanning angle and equipment defects. After wavelet transform, the initial signal is decomposed into low frequency and high frequency. Soft threshold function and hard threshold function are integrated to describe the changing trend of spectral data after wavelet decomposition, and the filtering threshold function is set to realize noise filtering. Simulation results show that the proposed technique can effectively improve the signal-to-noise ratio of spectral signal, and the root mean square error between the filtered signal and the real signal is the smallest.

关 键 词：激光扫描 终端信息化 光谱数据 稳态滤波 小波分析 

分 类 号：O657[理学—分析化学]