Real-time Photonic Measurements, Data Management, and Processing VI最新文献

Front Matter: Volume 11902 封面:第11902卷

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-11-15 DOI: 10.1117/12.2619352

引用次数: 0

An improved signal filtering strategy based on EMD algorithm for ultrahigh precision grating encoder 一种改进的基于EMD算法的超高精度光栅编码器信号滤波策略

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2602201

Junhao Zhu, Kangning Yu, Gaopeng Xue, Qian Zhou, Xiaohao Wang, Xinghui Li

{"title":"An improved signal filtering strategy based on EMD algorithm for ultrahigh precision grating encoder","authors":"Junhao Zhu, Kangning Yu, Gaopeng Xue, Qian Zhou, Xiaohao Wang, Xinghui Li","doi":"10.1117/12.2602201","DOIUrl":"https://doi.org/10.1117/12.2602201","url":null,"abstract":"The signal filtering of the grating encoder is of great significance to the measurement accuracy, aiming at eliminating the background noise potentially from the temperature changes, airflow fluctuations, and mechanical vibrations. Compared with the traditional time-frequency analysis methods, including wavelet transform, fast Fourier transform (FFT), and time Fourier transforms (TFT), the empirical mode decomposition (EMD) algorithm owing to no basis functions and high adaptability, is widely applied for signal decomposition. Here, we extended the EMD algorithm for the background-noise-based signal filtering in a grating encoder, with the experimental parameters of 5 μm/s moving speed and ∼19 mm stroke. Simultaneously, a laser interferometer, as a reference, was additionally assembled to calibrate the measurement results of the grating encoder. The measurement signal was collected by NI acquisition card with a 1000 Hz sample rate and processed by EMD algorithm. Here, EMD decomposed the signal into multiple intrinsic mode functions (IMFs), which were reconstructed by removing the noise and DC components according to the correlation coefficients. Compared with the measurement results of the laser interferometer, the measurement displacement with a 6.2 μm error was solved by the phase correction and arctangent calculation from the reconstructed signals. Finally, our proposed signal-filtering approach based on the EMD algorithm exhibits a stable, accurate, and real-time calculation performance applicable for the grating encoder with ultra-high precision positioning.","PeriodicalId":328885,"journal":{"name":"Real-time Photonic Measurements, Data Management, and Processing VI","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123223887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

High-accuracy magnetic field and electric current measurement based on optoelectronic oscillator 基于光电振荡器的高精度磁场和电流测量

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2601426

Muguang Wang, Beilei Wu

引用次数: 0

Frequency response measurement of Mach-Zehnder modulators utilizing double carrier based on low frequency detection 基于低频检测的双载波马赫-曾德尔调制器频率响应测量

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2601474

Zhiyao Zhang, Yaowen Zhang, Lingjie Zhang, Ying-Xuan Xu, Yutong He, Shang-jian Zhang, Yujia Zhang, Yong Liu

引用次数: 0

Temporal focusing based ultrafast high-resolution spectroscopy 基于时间聚焦的超快高分辨率光谱学

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2601537

Chi Zhang, Xinliang Zhang

引用次数: 0

Visualization of internal phase motions in femtosecond soliton molecules using orbital angular momentum (OAM)-resolved method 用轨道角动量(OAM)分辨法可视化飞秒孤子分子内部相运动

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2601329

Yuwei Zhao, Jintao Fan, Youjian Song, Minglie Hu

引用次数: 0

Analysis of nebulization process based on multi-angle polarization scattering measurements 基于多角度偏振散射测量的雾化过程分析

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2601485

Zhidi Liu, N. Zeng, W. Guo, Hui Ma

{"title":"Analysis of nebulization process based on multi-angle polarization scattering measurements","authors":"Zhidi Liu, N. Zeng, W. Guo, Hui Ma","doi":"10.1117/12.2601485","DOIUrl":"https://doi.org/10.1117/12.2601485","url":null,"abstract":"Nebulization therapy is a common treatment for respiratory diseases. The particle size distribution and physicochemical properties of the atomized droplets of different nebulizers have a great impact on the treatment. Droplets larger than 5 microns and less than 10 microns generally can only reach the upper airway, those with 5-10 microns can reach the nasopharynx, those below 5 microns can reach the bronchi, and those smaller than one micron can enter the alveoli. This study provides a polarization measurement system for atomized droplets. In the experimental device, we used a 532 nm laser as the light source. In the incident module, we used a polarizer and a quarter wave plate to form a polarization generator to generate a specific incident polarization state. In the detection module, we measured the polarization scattering signals at four different angles, namely 30°, 60°, 85° and 115°. When the droplet passes through the scattering region, the trigger channel set in the forward direction of 10° first detects the signal, and then triggers the other four channels to complete the detection of the polarization signal. The liquid medicines we used in the experiment were sterile water, acetylcysteine, budesonide and sodium chloride solution. For different liquid medicines, we compared the nebulization effects of two nebulizers, oxygen-driven nebulizer and compressed air nebulizer. The suspended droplets produced by the nebulizer first pass through a pressure-stabilizing box with a built-in fan to realize the uniform dispersion of the atomized droplets, and then use the sheath flow device to realize single droplet detection according to the principle of hydrodynamic focusing. Experiments show that this method can obtain multidimensional polarization information for each measurement and enables fast real-time detection of the polarization scattering signal of liquid droplets.","PeriodicalId":328885,"journal":{"name":"Real-time Photonic Measurements, Data Management, and Processing VI","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121038527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

LFM-Costas waveform generation based on a Fourier domain mode locking optoelectronic oscillator 基于傅里叶域锁模光电振荡器的LFM-Costas波形生成

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2601394

Xiangrui Tian, Lingjie Zhang, Huan Tian, Zhiyao Zhang, Heping Li, Yong Liu

引用次数: 0

Proposal of real-time Brillouin fiber sensing based on compressing sensing and pattern recognition algorithms 基于压缩感知和模式识别算法的实时布里渊光纤传感

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2601336

Benzhang Wang, Yupeng Zhang, Fan Zhou, X. Ye, Dongliang Quan

引用次数: 0

Performance enhancement of microwave photonic-filter-based interrogation system using machine-learning algorithm 利用机器学习算法增强微波光子滤波讯问系统的性能

Real-time Photonic Measurements, Data Management, and Processing VI Pub Date : 2021-10-09 DOI: 10.1117/12.2601268

D. Zheng, X. Zou, Chengming Luo, Xiuwen Zhang, Jing Li

引用次数: 0