Articles in press have been peer-reviewed and accepted, which are not yet assigned to volumes /issues, but are citable by Digital Object Identifier (DOI).
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Survey & Review
Progress in Oxide-based Ultraviolet Detectors
JIA Menghan, TANG Libin, ZUO Wenbin, WANG Fang, JI Rongbin, XIANG Jinzhong
2020, 42(12): 1121-1133.  
Abstract HTML(30) PDF(22)
Abstract:
With the development of ultraviolet detection technology, oxide materials showing the unique advantages in the field of ultraviolet detection, which the traditional detectors didn't possess, and becoming a hot research topic in recent years. It is a fast-developing dual-purpose detection technology after the infrared detection technology. However, the wide applications of oxide-based ultraviolet detectors still face challenges. In this paper, we have summarized the applications and development histories of the ultraviolet detection technology at home and abroad. The crystal structures, properties and progresses in devices of three kinds of metal oxide ultraviolet materials are summarized and discussed. In the end, the problems in the research of the oxide-based ultraviolet detection materials and devices are analyzed, and the development of the oxide-based ultraviolet detection technology is summarized and prospected.
Systems & Designs
Multi-index Test Evaluation System for Performance of Gas Leak Thermal Imaging Systems
QIN Chao, ZHANG Xu, YUAN Pan, JIN Weiqi, LI Li, WANG Xia
2020, 42(12): 1134-1140.  
Abstract HTML(16) PDF(13)
Abstract:
At present, the technology for the performance evaluation of gas leak thermal imaging detectors is not sufficiently well-developed, and there is no systematic research report on the test systems or methods of the corresponding evaluation index. However, it is difficult for the performance evaluation methods of conventional thermal imaging cameras to directly evaluate the detection capabilities of gas leak thermal imaging systems. We designed a test and evaluation system that can measure the performance of gas leak thermal imaging systems with multiple types of performance indicators. NECL, MRGC, and MDGC were measured experimentally in a laboratory environment with ethylene and methane gas as the detection target. The experimental measurements verify that the test evaluation system is feasible and practical.
Simulation Analysis of Thermal-Structure of an Optical Detection System
LI Huan, HU Liang, MENG Xiangfu, LI Qi, WANG Shuang
2020, 42(12): 1141-1150.  
Abstract HTML(9) PDF(13)
Abstract:
Thermal load is one of the main reasons for the failure of infrared detection system, therefore, thermal-structure coupling analysis of a certain type of infrared imaging optical detection module under different temperature loads by means of ANSYS Workbench software was performed in this study. First, the response of the back intercept between the optical lens and the detector under different temperature loads was observed, and then, the theoretical imaging quality was calculated by the optical software ZEMAX on the basis of the back intercept. Finally, the theoretical calculation models were verified by the environment test. Simultaneously, the deformation rule of the optical detection module under different temperature loads was obtained, and it was found that the conductivity coefficient and thermal expansivity of the installation material of the detector affected the stability of the detection module. This research can provide guidance on the design, optimization, and reliability of infrared imaging optical detection modules.
Vibration Reduction of Infrared Detection Equipments on Airborne Platform
YE Zongmin, LI Zhuo
2020, 42(12): 1151-1158.  
Abstract HTML(12) PDF(15)
Abstract:
Airborne infrared measurement systems are mounted on aircraft to track and measure the infrared characteristics of the ground target. The impact of platform jitter and environmental change must be addressed to achieve stable tracking and measurement accuracy. To this end, the technology of passive isolation and active gyroscopic stability control was used in this study to examine the influence of airborne platform jitter. To ensure stable tracking and imaging, the high-frequency disturbances were isolated through a passive shock absorber, and the low-frequency disturbances were suppressed through a frame servo system. Non-thermalization compensation calculation and focusing compensation control were adopted in the design of the optical lens to ensure clear imaging of the equipment and thus study the influence of the temperature change of the ground and air environment on the infrared optical system. Simulation calculations and field measurement demonstrated that these vibration reduction measures are reasonable and effective. The equipment thus developed is stable in tracking and clear in imaging. Therefore, it is suitable for realizing hanging flight measurement on different platforms.
Optical System of Compact Thermal Imager for Near and Far Distances for Armed Police
ZHAO Zhiyuan
2020, 42(12): 1159-1163.  
Abstract HTML(13) PDF(9)
Abstract:
A compact thermal imaging system, operating over both near and far distances, for armed police is introduced. A design example is proposed. The working band is 8–12 μm, the center wavelength is 10 μm, the long focal length is 150 mm, the short focal length is 50 mm, and the F number is 1.1. The system can match the performance of an uncooled focal plane infrared detector with a pixel number of 384×288 and a pixel size of 17 μm×17 μm. The system realizes zooming by the axial movement of the zoom group. By using binary optical surface and aspheric surface, the volume and mass of the imaging system are reduced, and the image quality is improved. The design results show that the thermal imaging system has appropriate image quality, which is suitable for fire rescue, fire prevention, night detection, and border monitoring.
Design and Development of a Cassegrain Off-axis Reflection System Collimator
XU Zhengkui, WANG Chunxing, WANG Shijing, WANG Guiquan, CAI Shunwen, LI Xiaobin, HUANG Sheng
2020, 42(12): 1164-1169.  
Abstract HTML(17) PDF(10)
Abstract:
We design and develop a Cassegrain off-axis reflection system collimator with a focal length of 8 m according to production requirements and construct an advanced installation and adjustment method to accurately calibrate it. Through the interpretation of images and interference fringes, the imaging quality of the collimator system is found to be close to the designed value. We solve the problem of the infrared discrimination test target board in production because the longest focal length of the existing collimator focal length is 3 m, and there is no corresponding spatial frequency required by the product.
Materials & Devices
Experimental Detection and Analysis of Hyperspectral Polarization Characteristics of Typical Camouflage Materials
JIA Rong, WANG Feng, YIN Zhangkun, LIU Xiao
2020, 42(12): 1170-1178.  
Abstract HTML(7) PDF(5)
Abstract:
In view of the limitations of traditional detection methods that can not obtain the polarization information and spectral information of camouflage materials in complex background, this paper uses hyperspectral polarization imaging technology to detect and analyze the high-spectral polarization characteristics of typical camouflage materials. In the experiment, a set of simultaneous aperture hyperspectral polarization imaging system was used to detect the hyperspectral polarization of typical camouflage materials such as camouflage coating and camouflage net, and to analyze the nine polarization parameters of the camouflage material, and obtain the relative reflectance of camouflage material and background with spectral variation. The results show that by using the difference of polarization characteristics between the camouflage material and the background, selecting the appropriate polarization parameter can increase the texture detail of the target and improve its contrast. The spectral polarization characteristics are analyzed, and the 760 nm detection band is selected to facilitate the rapid and accurate detection of the camouflage material.
Measurements
Compensation Algorithm to Improve the Influence of Ambient Light on the Infrared Temperature Measurement Accuracy of a Strong Reflector Surface
WEI Shaoliang, HAN Lianwei, CHENG Fengyu
2020, 42(12): 1179-1184.  
Abstract HTML(6) PDF(8)
Abstract:
A roll surface in aluminum processing is smooth, has strong reflective characteristics, and is easily affected by ambient light when using an infrared temperature sensor to measure the temperature, resulting in low temperature measurement accuracy on the roll surface. The cooling control system affects the precision of cooling treatment on the roll surface, resulting in poor product quality. In this study, an infrared temperature compensation algorithm based on light intensity is proposed and constructed to improve the accuracy of ambient light measurement of the surface temperature of a strong reflector. Experimental results show that this method can compensate for measurement errors caused by changes in illumination intensity, thereby improving the measurement accuracy. The algorithm is simple and adaptable and provides a new approach to strengthening the accuracy of temperature measurement given speed change.
Mage Processing & Simulation
Hyperspectral Image Classification Based on Feature Importance
ZHANG Yinguo, TAO Yuxiang, LUO Xiaobo, LIU Minghao
2020, 42(12): 1185-1191.  
Abstract HTML(5) PDF(13)
Abstract:
To reduce the redundancy in hyperspectral images and further explore their potential classification information, a convolutional neural network(CNN) classification model based on feature importance is proposed. First, the random forest(RF) model obtained by Bayesian optimization training is used to evaluate the importance of hyperspectral images. Second, an appropriate number of hyperspectral image bands are selected as new training samples according to the evaluation results. Finally, the 3D-CNN is used to extract and classify the obtained samples. Based on two sets of measured hyperspectral remote sensing image data, the experimental results demonstrate the following: compared with the original spectral information obtained directly using a support vector machine(SVM) and the CNN classification effect, the proposed hyperspectral classification model based on feature importance can effectively improve the classification accuracy of hyperspectral images while reducing dimensionality.
Automatic Verification of Field Programmable Gate Arrays for Dead Pixel Correction
LI Yanlong, YANG Qi, WANG Xuefeng
2020, 42(12): 1192-1197.  
Abstract HTML(5) PDF(5)
Abstract:
To accelerate the simulation speed and improve the coverage of verification for a field programmable gate array (FPGA) implemented with dead pixel correction of an infrared image, an FPGA automatic verification platform based on SystemVerilog-Direct programming interface(SV-DPI) was designed. Using DPI programming interface technology, the C++ programming language was invoked by the SV platform. A generator and correction model for dead pixel data of infrared images was built. This established a communication between two languages on the transaction level. The results show that, compared with the traditional verification method, the proposed platform is simple in structure and can quickly generate a test vector, construct a reference model, and check results automatically. It realizes automated verification for an FPGA implemented with dead pixel detection and correction of an infrared image. The function coverage can reach 100%. It effectively shortens the period of construction and debugging for the FPGA verification platform and improves the efficiency and quality of verification.
Ir Applications
Design of Intelligent Infrared Diagnosis System for Power Grid Equipment
LIU Rong, LIU Hui, JIA Ran, ZHANG Yang, ZHOU Chao, LIU Chuanbin, SHEN Qinghe
2020, 42(12): 1198-1202.  
Abstract HTML(7) PDF(9)
Abstract:
The widely used infrared diagnosis of power grids is significantly influenced by the detection environment and professional level of personnels. The automation and intelligence level of conventional infrared thermal imagers are not sufficiently high. Therefore, this paper presents an intelligent infrared diagnosis system for power grid equipment, which includes an environment parameter module, ranging module, equipment type identification module, equipment material judgment module, radiation rate setting module, temperature measurement module, and report generation module. The system automatically detects the ambient temperature, humidity, wind speed, and detection distance with the equipment, as well as automatically identifies the equipment material type, determines the radiation rate, and automatically sets the aforementioned parameters in the thermal imager. The thermal imager judges the equipment type through image recognition, automatically reads the temperature data of the corresponding position of the equipment according to the judgment method and criterion of the infrared diagnosis standard of the equipment, and obtains the detection conclusion by calculation. It not only reduces the number of instruments required to be carried by the infrared detection personnel, but also realizes the automatic setting of instrument detection parameters, with intelligent identification of equipment types and automatic generation of detection conclusions, thereby reducing the level of professional requirements for detection personnel.
Defect Detection System Based on UAV Images for Wind Turbine Blades
ZHAO Chunyi, GUO Hongtao, GUO Tao, LIANG Guo, JING Haicheng
2020, 42(12): 1203-1210.  
Abstract HTML(10) PDF(7)
Abstract:
This study proposes and designs an automatic defect detection system based on UAV images for wind turbine blades, aimed at alleviating problems with manual detection methods, such as low efficiency and inaccurate defect detection. This paper introduces the system's image acquisition system, acquisition method, defect detection principle, and detection result. This system uses a UAV as the flying carrier to realize automatic inspection of wind turbine blades, thereby improving the inspection efficiency and reducing the manual workload. Through image segmentation and defect detection algorithm design, automatic detection of suspicious defect areas is achieved. Double light fusion of visible and infrared light improves the accuracy of automatic blade defect recognition. After multiple field tests and verification, the system is shown to accurately and quickly realize the automatic identification and detection of defects, such as bulges, cracks, and wrinkles.
Present State and Perspectives of Small Infrared Targets Detection Technology
HOU Wang, SUN Xiao-liang, SHANG Yang, YU Qi-feng
2015, 37(1): 1-10.  
[Abstract](10) [PDF 2162KB](1)
摘要:
在一些关键的军事和民用红外成像应用领域,待突破的技术瓶颈往往都集中在红外弱小目标检测技术上.简介了红外弱小目标检测的含义和在军事、民用方面的意义,重点综述了目前红外弱小目标检测的各类典型算法原理和特点,最后对红外弱小目标检测技术的研究和发展趋势进行了预测.
Uncooled Infrared FPA--A Review and Forecast
FENG Tao, JIN Wei-qi, SI Jun-jie
2015, (3): 177-184.  
[Abstract](14) [PDF 1085KB](1)
摘要:
非制冷红外焦平面探测器是热成像系统的核心部件。介绍了非制冷红外焦平面探测器的工作原理及微测辐射热计、读出电路、真空封装三大技术模块,分析了影响其性能的关键参数。与微测辐射热计设计相关的重要参数包括低的热导、高的红外吸收率、合适的热敏材料等;读出电路的传统功能是实现信号的转换读出,近年来也逐渐加入了信号补偿的功能;真空封装技术包括了金属管壳封装、陶瓷管壳封装、晶圆级封装和像元级封装。列举了国内外主要厂商的非制冷红外焦平面探测器的技术指标及近年来的最新技术进展,总结了非制冷红外焦平面探测器的技术发展趋势。
Read Out Integrated Circuit for Third-Generation Infrared Focal Plane Detector
BAI Pi-ji, YAO Li-bin
2015, (2): 89-96.  
[Abstract](7) [PDF 738KB](0)
摘要:
对红外探测器不断增长和提高的需求催生了第三代红外焦平面探测器技术。根据第三代红外探测器的概念,像素达到百万级,热灵敏度NETD达到1 mK量级是第三代制冷型高性能红外焦平面探测器的基本特征。计算结果表明读出电路需要达到1000 Me-以上的电荷处理能力和100 dB左右的动态范围(Dynamic Range)才能满足上述第三代红外焦平面探测器需求。提出在像素内进行数字积分技术,以期突破传统模拟读出电路的电荷存储量和动态范围瓶颈限制,使高空间分辨率、高温度分辨率及高帧频的第三代高性能制冷型红外焦平面探测器得到实现。
Military Application of UAV Reconnaissance Target Localization
YANG Shuai, CHENG Hong, LI Ting, SUN Wenbang
2016, 38(6): 467-471.  
[Abstract](7) [PDF 579KB](0)
摘要:
无人机能够通过多种方法定位出目标的精确位置信息,以便实施战场指挥或军事打击。主要整理并分类介绍了无人机侦察图像目标定位的各种技术原理,解析了其在军事领域的应用范围;并以无人机飞行任务为模型,完整详细地用空间量算的无人机侦察图像目标定位技术对无人机实际飞行进行航迹规划的运用,证明了无人机侦察图像目标定位技术的重要军事价值。
Infrared Thermography NDT and Its Development
ZHENG Kai, JIANG Haijun, CHEN Li
2018, 40(5): 401-411.  
[Abstract](9) [PDF 1575KB](1)
摘要:
红外热波成像是近年来发展较快的一种新型无损检测技术,它是一门跨学科、跨应用领域的通用型实用技术,其三大核心技术包括热激励、红外图像采集及红外图像处理.本文对热激励技术中的闪光灯、激光、卤素灯、红外灯、超声、电磁等几种主要热激励方法的特点及研究现状进行了介绍与对比,分析了采集技术中的制冷与非制冷热像仪各自特点,并对红外图像处理技术中的降噪、增强、序列热图处理及缺陷提取等四大研究方向进行了总结,介绍了相应发展状况和进展.最后总结了该技术的发展趋势.
Infrared Image Background Compensation Based on Morphological Filter
LI Wuzhou, YU Feng, WANG Bing, HU Huxiang, ZHOU Changrong
2016, 38(4): 333-336.  
[Abstract](4) [PDF 995KB](0)
摘要:
天空背景的红外辐射特性与观测天顶角有关,造成具有天空背景的红外图像背景亮度不均匀,影响了红外图像后续处理.针对红外图像天空背景亮度不均匀的特点,提出了一种基于形态学滤波的红外图像背景补偿方法,并采用了一种简单的自动全局阈值处理方法对背景补偿效果进行了实验验证,结果表明,该方法能够很好的解决红外图像天空背景亮度不均匀的问题.
Research on Influence Factors for Measuring and Method of Correction in Infrared Thermometer
LIAO Panpan, ZHANG Jiamin
2017, 39(2): 173-177.  
[Abstract](9) [PDF 1228KB](0)
摘要:
为了减少红外测温仪的测量误差,提高红外测温仪的测温精度,分析了距离、发射率和外界环境温度等因素对红外测温仪测温的影响;建立了红外测温实验系统采集测温数据,并对采集到的实验数据进行了分析验证,通过分析验证可得距离因素对红外辐射测温精度有较大的影响,并且存在一定的关系,从而为提高红外测温精度的提供了依据;设计了一套提高红外测温仪测量精度的系统,该系统能够测出被测物与红外测温仪之间的距离,根据测出的结果得到距离补偿公式,然后依据公式得出温度的距离补偿,从而得到物体的实际温度.最后分析可得,红外测温仪的测量精度能够大幅提高.
Research Progress of Low Infrared Emissivity Materials
ZHANG Wei-gang, XU Guo-yue, XUE Lian-hai
2015, (5): 361-367.  
[Abstract](5) [PDF 602KB](0)
摘要:
低红外发射率材料是目前公认的可实现飞行器红外隐身的特种功能材料。现已报道了纳米复合薄膜、单层(多层)膜结构材料、树脂/金属复合涂层、树脂/半导体复合涂层、核壳结构材料等多种类型的低红外发射率材料。介绍了上述低红外发射率材料的优缺点及最新研究进展,指出低红外发射率涂层的理论研究、红外与激光兼容隐身材料、树脂/半导体复合涂层及红外光谱选择性低发射率涂层是未来的重点研究方向。
Study of Sea-sky-line Detection Algorithm Based on Hough Transform
AN Bo-wen, HU Chun-nuan, LIU Jie, CAO Yan-jue
2015, (3): 196-199.  
[Abstract](5) [PDF 644KB](0)
摘要:
海天线检测是红外航拍图像的一项重要研究内容。深入探讨海天线检测问题,给出了一种实用的检测算法。首先,对获取的红外图像进行梯度运算,采用Ostu阈值分割方法,获取海天边缘信息;然后根据Hough变换原理,完成海天线的检测。此外,通过随机点采样提高了海天线检测的速率,通过多线段拟合提高了检测的准确率。实验结果表明,本算法可以准确、高效地检测出海天线,为下一步研究奠定了基础。
Infrared Image Segmentation for Electrical Equipment Based on FAsT-Match Algorithm
ZOU Hui, HUANG Fuzhen
2016, 38(1): 21-27.  
[Abstract](4) [PDF 3756KB](0)
摘要:
红外技术能有效地检测电力设备过热缺陷,具有远距离、不接触、不取样、准确、快速、直观等特点.传统的电力设备故障红外人工诊断耗时、耗力,而针对人工诊断不足提出的智能诊断其难点之一在于能否较好的获得感兴趣区域(ROI,Region of interest).红外图像具有强度集中、对比度低等性质,常用的分割算法用于电力设备红外图像ROI获取,其结果往往是过分割.针对过分割难点,本文提出一种基于FAsT-Match算法的电力设备红外图像分割方法.首先,运用FAsT-Match算法在可见光图像中近似模板匹配,然后在红外与可见光图像之间通过近似仿射变换找到目标在红外图像中的近似区域,最后用分割算法对近似区域分割.实验结果表明,提出的方法能够较好地解决电力设备红外图像过分割问题.
Progress in Oxide-based Ultraviolet Detectors
JIA Menghan, TANG Libin, ZUO Wenbin, WANG Fang, JI Rongbin, XIANG Jinzhong
2020, 42(12): 1121-1133.  
[Abstract](971) [FullText HTML](30) [PDF 11718KB](30)
Abstract:
With the development of ultraviolet detection technology, oxide materials showing the unique advantages in the field of ultraviolet detection, which the traditional detectors didn't possess, and becoming a hot research topic in recent years. It is a fast-developing dual-purpose detection technology after the infrared detection technology. However, the wide applications of oxide-based ultraviolet detectors still face challenges. In this paper, we have summarized the applications and development histories of the ultraviolet detection technology at home and abroad. The crystal structures, properties and progresses in devices of three kinds of metal oxide ultraviolet materials are summarized and discussed. In the end, the problems in the research of the oxide-based ultraviolet detection materials and devices are analyzed, and the development of the oxide-based ultraviolet detection technology is summarized and prospected.
Vibration Reduction of Infrared Detection Equipments on Airborne Platform
YE Zongmin, LI Zhuo
2020, 42(12): 1151-1158.  
[Abstract](38) [FullText HTML](12) [PDF 831KB](12)
Abstract:
Airborne infrared measurement systems are mounted on aircraft to track and measure the infrared characteristics of the ground target. The impact of platform jitter and environmental change must be addressed to achieve stable tracking and measurement accuracy. To this end, the technology of passive isolation and active gyroscopic stability control was used in this study to examine the influence of airborne platform jitter. To ensure stable tracking and imaging, the high-frequency disturbances were isolated through a passive shock absorber, and the low-frequency disturbances were suppressed through a frame servo system. Non-thermalization compensation calculation and focusing compensation control were adopted in the design of the optical lens to ensure clear imaging of the equipment and thus study the influence of the temperature change of the ground and air environment on the infrared optical system. Simulation calculations and field measurement demonstrated that these vibration reduction measures are reasonable and effective. The equipment thus developed is stable in tracking and clear in imaging. Therefore, it is suitable for realizing hanging flight measurement on different platforms.

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Monthly, Established 1979

Competent Authorities:China North Industries Group Corporation

Sponsored by:Kunming Institute of Physics
China Ordnance Society, Speciality

ISSN:1001-8891

CN:53-1054/TN

Postal distribution code:64-26

Editorial Office:No.31 Jiao Chang Dong Road, Kunming, 650223, China

Tel:0871-65105248

E-mail:irtek@china.com

Infrared technology is one of the earliest photoelectronic journals in China.Infrared Technology is published by Science Press, and it is a single monthly technical journal.

Infrared Technology is a professional and academic journal based on scientific research, which comprehensively reflects the research progress of infrared technology at home and abroad and its application in national defense, industry, agriculture and national economy.After years of efforts, INFRARED Technology has become the core journal of Chinese, The core journal of Chinese science and technology, and the source journal of Chinese Science citation database.


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