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Respiratory rate monitoring system based on inorganic halide perovskite humidity sensor 基于无机卤化物钙钛矿湿度传感器的呼吸速率监测系统
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-03-22 DOI: 10.12086/OEE.2021.200100
Wu Yingjie, Wu Zhilin, Wang Lin, Nian Weiqi, He Yong, Guo Yong-cai
{"title":"Respiratory rate monitoring system based on inorganic halide perovskite humidity sensor","authors":"Wu Yingjie, Wu Zhilin, Wang Lin, Nian Weiqi, He Yong, Guo Yong-cai","doi":"10.12086/OEE.2021.200100","DOIUrl":"https://doi.org/10.12086/OEE.2021.200100","url":null,"abstract":"The traditional respiratory rate measurement technologies have several deficiencies, such as subjective appraised results, complicated signal extraction processes, difficult access to equipment, and inconvenience to move due to the wired connection setting. The respiratory airflow can directly reflect the human breath, and the respiratory frequency is usually 1012 breaths/min (1 ventilation every 56 seconds). The humidity difference between exhalation and inhalation can be directly used to measure respiratory rate. In the present work, a wireless respiratory rate monitoring system based on inorganic halide perovskite humidity sensor was developed. The sensor exhibits an ultrasensitive humidity sensing performance, which overcomes the long response/recovery time (> 10 seconds) of the commercial humidity sensors. The system utilized a Zigbee wireless communication to transmit the measurement signal, which separates the signal detection and processing parts, making it easier for the tester to move. The upper computer software was designed and used for data processing to calculate the breathing rate. The system can accurately monitor the respiratory rate in real-time, recognize and alarm the apnea successfully by comparing with a setting threshold value. The test results show that the system can accurately monitor the breathing rate with a maximum error of 1 time per minute. The system possesses great potential for application in respiratory rate monitoring due to its high accuracy, simple operation, portability, and low cost.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74656273","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
Design of a photonic crystal fiber with low confinement loss and high birefringence 低约束损耗、高双折射光子晶体光纤的设计
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-03-22 DOI: 10.12086/OEE.2021.200368
Z. Lijuan, Liang Ruoyu, Zhao Haiying, Xu Zhiniu
{"title":"Design of a photonic crystal fiber with low confinement loss and high birefringence","authors":"Z. Lijuan, Liang Ruoyu, Zhao Haiying, Xu Zhiniu","doi":"10.12086/OEE.2021.200368","DOIUrl":"https://doi.org/10.12086/OEE.2021.200368","url":null,"abstract":"A photonic crystal fiber (PCF) for long distance communication was proposed in this paper. The circular and elliptical air holes distribute in the cladding, and there are two small elliptical air holes around the core in cross section of the PCF. The characteristics of the PCF were analyzed by using the finite element method (FEM) sys-tematically. The results show that the PCF offers an ultrahigh birefringence of 3.51×10-2 and the confinement loss as low as 1.5×10-9 dB/m with the optimal structure at the wavelength of 1550 nm. Compared with the existing photonic crystal fibers with elliptical air holes, the birefringence has a large increase, and the confinement loss reduces by 5 orders of magnitude. Additionally, we also analyzed the relationship between the dispersion of the PCF and the wavelength, and obtained the Brillouin gain spectrum characteristics. In general, the PCF can be used in long distance communication system.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74889523","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
Method of simultaneous calibration of dual view 3D measurement system 双视点三维测量系统的同步标定方法
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-03-22 DOI: 10.12086/OEE.2021.200127
Zhao Hanzhuo, Gao Nan, Meng Zhaozong, Zhang Zonghua
{"title":"Method of simultaneous calibration of dual view 3D measurement system","authors":"Zhao Hanzhuo, Gao Nan, Meng Zhaozong, Zhang Zonghua","doi":"10.12086/OEE.2021.200127","DOIUrl":"https://doi.org/10.12086/OEE.2021.200127","url":null,"abstract":"In view of the limitations of the existing methods when the camera has no common field of view, this paper proposes a method of using two plane calibration plates to calibrate two cameras at the same time. By deriving the coordinate transformation between the two cameras and two calibration plates, the solution of the relative pose relationship between any camera and the reference camera is transformed into a more mature hand-eye calibration equation. The experimental results show that this method can achieve simultaneous calibration of two cameras, and the absolute error is less than 0.089 mm. In the dual vision 3D measurement system, the cumulative error with phase height is less than 0.116 mm, which can provide a reliable initial value for the next step of data fusion.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86924624","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
Detection and recognition of distributed optical fiber intrusion signal 分布式光纤入侵信号的检测与识别
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-03-22 DOI: 10.12086/OEE.2021.200254
Zhang Yongkang, Shang Ying, Wang Chen, Zhao Wenan, Li Chang, Cao Bing, Wang Chang
{"title":"Detection and recognition of distributed optical fiber intrusion signal","authors":"Zhang Yongkang, Shang Ying, Wang Chen, Zhao Wenan, Li Chang, Cao Bing, Wang Chang","doi":"10.12086/OEE.2021.200254","DOIUrl":"https://doi.org/10.12086/OEE.2021.200254","url":null,"abstract":"Distributed acoustic sensing (DAS) technology can detect acoustic or vibration signals with high sensitivity and wide dynamic range by receiving the phase information from coherent Rayleigh scattered light. Linear quanti-zation is used to measure high fidelity restoration of the signals. With the increasing demand of practical applications, the optical fiber intrusion detection field has put forward higher requirements for event location and identification, which is manifested as the accurate classification of intrusion events. Therefore, the combination of distributed acoustic sensing and pattern recognition (PR) technology is a hot research topic at present. This is beneficial to promote the application and development of distributed optical fiber sensing technology. The research progress of the pattern recognition technology applied to distributed optical fiber intrusion detection in recent years is summarized in this paper, which can be used for feature extraction and classification algorithm research progress. In this paper, several feature extraction methods for realizing intrusion event signal recognition and their feature selection difficulties in different application situations are reviewed. Meanwhile, the advantages and disadvantages of specific event recognition algorithm are analyzed and summarized.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85090163","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: 1
Design and simulation of bionic compound eye with electrowetting liquid lens 电润湿液体晶体仿生复眼的设计与仿真
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-02-26 DOI: 10.12086/OEE.2021.200120
Zhao Rui, P. Chao, Zhang Kai, Kong Meimei, Chen Tao, Guan Jianfei, Liang Zhongcheng
{"title":"Design and simulation of bionic compound eye with electrowetting liquid lens","authors":"Zhao Rui, P. Chao, Zhang Kai, Kong Meimei, Chen Tao, Guan Jianfei, Liang Zhongcheng","doi":"10.12086/OEE.2021.200120","DOIUrl":"https://doi.org/10.12086/OEE.2021.200120","url":null,"abstract":"To solve the problem that the bionic compound eye system can't zoom adaptively, a zoomable bionic compound eye system based on electrowetting-on-dielectric liquid lens cambered array is proposed. The influence of the system structure on the imaging performance is analyzed, and the adaptive zoom capability of the system and the moving range of the corresponding image plane are calculated. The results show that the field of view angle increases with the increase of the curvature of the base. Compared with the non-uniform lens array, the uniform lens array can significantly reduce the defocus aberration of the system. Reducing the size of the lens unit can also decrease the defocus aberration of the edge lens. When the object distance or receiver position is changed, the defocus aberration of the system will be reduced by adjusting the focal length of the lens unit. The movable range of the system receiver is 1.9 mm~15 mm.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78424758","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
A weakly supervised learning method for vehicle identification code detection and recognition 车辆识别码检测与识别的弱监督学习方法
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-02-26 DOI: 10.12086/OEE.2021.200270
Cao Zhi, Shang Lidan, Yin Dong
{"title":"A weakly supervised learning method for vehicle identification code detection and recognition","authors":"Cao Zhi, Shang Lidan, Yin Dong","doi":"10.12086/OEE.2021.200270","DOIUrl":"https://doi.org/10.12086/OEE.2021.200270","url":null,"abstract":"The vehicle identification code (VIN) is of great significance to the annual vehicle inspection. However, due to the lack of character-level annotations, it is impossible to perform the single-character style check on the VIN. To solve this problem, a single-character detection and recognition framework for VIN is designed and a weakly supervised learning algorithm without character-level annotation is proposed for this framework. Firstly, the feature information of each level of VGG16-BN is fused to obtain a fusion feature map with single-character position information and semantic information. Secondly, a network structure for both the character detection branch and the character recognition branch is designed to extract the position and semantic information of a single character in the fusion feature map. Finally, using the text length and single-character category information, the proposed framework is weakly supervised on the vehicle identification code data set without character-level annotations. On the VIN test set, experimental results show that the proposed method realizes the Hmean score of 0.964 and a single-character detection and recognition accuracy rate of 95.7%, showing high practicability.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76738391","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
Target tracking algorithm based on YOLOv3 and ASMS 基于YOLOv3和asm的目标跟踪算法
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-02-26 DOI: 10.12086/OEE.2021.200175
Lve Chen, C. Deqiang, Kou Qiqi, Zhuang Huandong, Liu Haixiang
{"title":"Target tracking algorithm based on YOLOv3 and ASMS","authors":"Lve Chen, C. Deqiang, Kou Qiqi, Zhuang Huandong, Liu Haixiang","doi":"10.12086/OEE.2021.200175","DOIUrl":"https://doi.org/10.12086/OEE.2021.200175","url":null,"abstract":"In order to solve the problem of loss when the target encounters occlusion or the speed is too fast during the automatic tracking process, a target tracking algorithm based on YOLOv3 and ASMS is proposed. Firstly, the target is detected by the YOLOv3 algorithm and the initial target area to be tracked is determined. After that, the ASMS algorithm is used for tracking. The tracking effect of the target is detected and judged in real time. Reposi-tioning is achieved by quadratic fitting positioning and the YOLOv3 algorithm when the target is lost. Finally, in order to further improve the efficiency of the algorithm, the incremental pruning method is used to compress the algorithm model. Compared with the mainstream algorithms, experimental results show that the proposed algorithm can solve the lost problem when the tracking target is occluded, improving the accuracy of target detection and tracking. It also has advantages of low computational complexity, time-consuming, and high real-time performance.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82123258","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
Research on multi-feature human pose model recognition based on one-shot learning 基于单次学习的多特征人体姿态模型识别研究
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-02-26 DOI: 10.12086/OEE.2021.200099
Liu Guoyou, Liu Chenguang, Wang Weijiang, Yang Mengqi, Hang Bingpeng
{"title":"Research on multi-feature human pose model recognition based on one-shot learning","authors":"Liu Guoyou, Liu Chenguang, Wang Weijiang, Yang Mengqi, Hang Bingpeng","doi":"10.12086/OEE.2021.200099","DOIUrl":"https://doi.org/10.12086/OEE.2021.200099","url":null,"abstract":"With the development of human-computer interaction, virtual reality, and other related fields, human posture recognition has become a hot research topic. Since the human body belongs to a non-rigid model and has time-varying characteristics, the accuracy and robustness of recognition are not ideal. Based on the KinectV2 so-matosensory camera to collect skeletal information, this paper proposes a one-shot learning model matching method based on human body angle and distance characteristics. First, feature extraction is performed on the collected bone information, and the joint point vector angle and joint point displacement are calculated and a threshold is set. Secondly, the pose to be measured is matched with the template pose, and the recognition is successful if the threshold limit is met. Experimental results show that the method can detect and recognize human poses within the defined threshold in real-time, which improves the accuracy and robustness of recognition.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83493119","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
A B-spline based fast wavefront reconstruction algorithm 一种基于b样条的快速波前重构算法
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-02-26 DOI: 10.12086/OEE.2021.200160
Chenxiang Hao, Wei Ling, L. Ende, He Yi, Yang Jinsheng, L. XiQi, Fan Xinlong, Yang Zeping, Zhang Yudong
{"title":"A B-spline based fast wavefront reconstruction algorithm","authors":"Chenxiang Hao, Wei Ling, L. Ende, He Yi, Yang Jinsheng, L. XiQi, Fan Xinlong, Yang Zeping, Zhang Yudong","doi":"10.12086/OEE.2021.200160","DOIUrl":"https://doi.org/10.12086/OEE.2021.200160","url":null,"abstract":"Traditional schemes for Shack-Hartmann wavefront reconstruction can be classified into zonal and modal methods. The zonal methods are good at reconstructing the local details of the wavefront, but are sensitive to the noise in the slope data. The modal methods are much more robust to the noise, but they have limited capability of recovering the local details of the wavefront. In this paper, a B-spline based fast wavefront reconstruction algorithm in which the wavefront is expanded to the linear combination of bi-variable B-spline curved surfaces is proposed. Then, a method based on successive over relaxation (SOR) algorithm is proposed to fast reconstruct the wavefront. Experimental results show that the proposed algorithm can recover the local details of the wavefront as good as the zonal methods, while is much more robust to the slope noise.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90254915","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: 1
Polarization regulation characteristics of reflected waves at the interface of double topological insulators 双拓扑绝缘体界面反射波的偏振调节特性
Guangdian Gongcheng/Opto-Electronic Engineering Pub Date : 2021-02-26 DOI: 10.12086/OEE.2021.200102
Zhai Zhizhu, Wang Mingjun, Wu Biyuan
{"title":"Polarization regulation characteristics of reflected waves at the interface of double topological insulators","authors":"Zhai Zhizhu, Wang Mingjun, Wu Biyuan","doi":"10.12086/OEE.2021.200102","DOIUrl":"https://doi.org/10.12086/OEE.2021.200102","url":null,"abstract":"The property of reflective polarization on the surface of two 3D strong topological insulators was studied, obtaining the generalized necessary conditions required for the complete polarization conversion of linearly polarized light. By analyzing the reflectivity, cross reflectivity, and polarization conversion ratios of the interface of two topological insulators, we found that the model can realize the complete polarization conversion by using the existing topological insulator material, breaking through the limitation that the complete conversion requires a new small dielectric constant topological insulator material. The process can be verified by the Kerr rotation angle. Finally, we show the design method of polarization conversion devices to realize super strong angular stability. The polarization control capability of topological insulators can also be verified by Kerr effect. This work provides a theoretical basis for the application of topological insulators in polarized devices.","PeriodicalId":39552,"journal":{"name":"Guangdian Gongcheng/Opto-Electronic Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78477566","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: 1
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