本质安全型低照度视频采集激光辅助光源设计
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摘要
针对现有低照度视频采集辅助光源存在功耗高、体积大、照射距离近、隐蔽性差等问题,提出了一种本质安全型低照度视频采集激光辅助光源设计方案。选用光源波长为940nm的半导体激光二极管,利用多模光纤、匀光片和透镜使半导体激光二极管输出光束形状规则、光照强度均匀;本质安全型驱动电路采用恒流驱动方式,具有过压、防反接和防静电保护;通过散热装置降低半导体激光二极管工作温度,使激光辅助光源能长时间稳定工作。测试结果表明,该激光辅助光源照射距离可达20m,功耗小于3 W,持续工作温度低于50℃。
For problems of high power consumption,large volume,close irradiation distance and poor concealment of existing auxiliary light source for low-illumination video acquisition,a design scheme of intrinsically safe laser auxiliary light source for low-illumination video acquisition was proposed.The semiconductor laser diode with 940 nm wavelength of light source is selected,and multi-mode fiber,smoothing glasses and lens are used to realize regular shape and uniform illumination intensity of beam outputted by the semiconductor laser diode.The intrinsically safe driving circuit adopts constant current driving mode with overvoltage,anti-reverse connection and anti-static protection.Working temperature of semiconductor laser diode is reduced through heat dissipation device,so that the laser auxiliary light source can work stably for a long time.The test results show that the laser auxiliary light source with irradiation distance is 20 m,power consumption is less than 3 Wand continuous working temperature below 50℃.
For problems of high power consumption,large volume,close irradiation distance and poor concealment of existing auxiliary light source for low-illumination video acquisition,a design scheme of intrinsically safe laser auxiliary light source for low-illumination video acquisition was proposed.The semiconductor laser diode with 940 nm wavelength of light source is selected,and multi-mode fiber,smoothing glasses and lens are used to realize regular shape and uniform illumination intensity of beam outputted by the semiconductor laser diode.The intrinsically safe driving circuit adopts constant current driving mode with overvoltage,anti-reverse connection and anti-static protection.Working temperature of semiconductor laser diode is reduced through heat dissipation device,so that the laser auxiliary light source can work stably for a long time.The test results show that the laser auxiliary light source with irradiation distance is 20 m,power consumption is less than 3 Wand continuous working temperature below 50℃.
引文
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[16]井红旗,仲莉,倪羽茜,等.高功率密度激光二极管叠层散热结构的热分析[J].发光学报,2016,37(1):81-87.JING Hongqi,ZHONG Li,NI Yuxi,et al.Thermal analysis of high power density laser diode stack coolingstructure[J]. ChineseJournalof Luminescence,2016,37(1):81-87.
[2]刘琨.矿用摄像机的应用及最低照度测试方法的改进[J].电气防爆,2017(3):14-17.LIU Kun.Application of mine camera in underground and improvement of minimum illuminance testing method[J].Electric Explosion Protection,2017(3):14-17.
[3]张祥忠,李宗为,张磊.矿用视频监控切换器的设计[J].煤矿安全,2013,44(6):112-114.ZHANG Xiangzhong,LI Zongwei,ZHANG Lei.Design of mine-used video monitoring switcher[J].Safety in Coal Mines,2013,44(6):112-114.
[4]国继征,尹强,别文明.矿用移动式视频监控系统的自主研制与应用[J].山东煤炭科技,2014(2):177-178.GUO Jizheng,YIN Qiang,BIE Wenming.Independent development and application of mine mobile video monitoring system[J].Shandong Coal Science and Technology,2014(2):177-178.
[5]艾磊.近红外激光主动夜视照明系统总体设计的方法[J].照明工程学报,2018,29(3):62-65.AI Lei.Overall design method of near infrared laser active night vision lighting system[J].China Illuminating Engineering Journal,2008,29(3):62-65.
[6]马亚运,韩绍坤,翟宇,等.一种基于光纤阵列的激光照明方法[J].光学技术,2018,44(2):201-205.MA Yayun,HAN Shaokun,ZHAI Yu,et al.An illumination method based on fiber array[J].Optical Technique,2018,44(2):201-205.
[7]赵会富.激光照明系统匀光技术的研究[J].长春理工大学学报(自然科学版),2017,40(4):14-18.ZHAO Huifu.Research on smoothing technology of laser illumination system[J].Journal of Changchun University of Science and Technology(Natural Science Edition),2017,40(4):14-18.
[8]刘韬,胡玥,董健,等.激光主动照明光学系统设计[J].中国光学,2016,9(3):342-348.LIU Tao,HU Yue,DONG Jian,et al.Design of laser active illumination optical system[J].Chinese Optics,2016,9(3):342-348.
[9]袁林成,蒋书波,宋相龙,等.半导体激光器驱动电路的研究与设计[J].电子器件,2015,38(6):1287-1291.YUAN Lincheng,JIANG Shubo,SONG Xianglong,et al.Research and design of driving circuit for semiconductor laser[J].Chinese Journal of Electron Devices,2015,38(6):1287-1291.
[10]费冬,姚健.激光夜视摄像机关键技术分析[J].铁路技术创新,2010(2):33-36.FEI Dong,YAO Jian.Analysis of key technologies of laser night-vision camera[J].Railway Technical Innovation,2010(2):33-36.
[11]罗春霞,陈海英.半导体激光器的实验特性分析及识别[J].激光杂志,2018,39(10):156-159.LUO Chunxia, CHENHaiying. Analysisand recognitionofexperimentalcharacteristicsof semiconductor laser[J].Laser Journal,2018,39(10):156-159.
[12]裴楠楠,徐国范,宋玲玲.带激光辅助照明的微光夜视仪的研制[J].激光与红外,2005,35(12):938-941.PEI Nannan,XU Guofan,SONG Lingling.Research of night vision system with laser supplementary illumination[J].Laser&Infrared,2005,35(12):938-941.
[13]张小红,欧浩源.面向大功率LED电源驱动的PT4115控制系统[J].贵州师范大学学报(自然科学版),2014,32(4):62-65.ZHANG Xiaohong,OU Haoyuan.Large power LED driven PT4115control system[J].Journal of Guizhou Normal University(Natural Sciences),2014,32(4):62-65.
[14]于莎莎,吴国瑞.半导体激光二极管的电流调制与驱动[J].电测与仪表,2015,52(22):124-128.YU Shasha,WU Guorui.Current modulation and driven for laser diode[J].Electrical Measurement&Instrumentation,2015,52(22):124-128.
[15]王易,徐祥柱,黎兆宏,等.一种用于LED驱动的恒流控制电路设计[J].微电子学,2012,42(2):229-232.WANG Yi,XU Xiangzhu,LI Zhaohong,et al.Design of constant-current controlled circuit for LED driver[J].Microelectronics,2012,42(2):229-232.
[16]井红旗,仲莉,倪羽茜,等.高功率密度激光二极管叠层散热结构的热分析[J].发光学报,2016,37(1):81-87.JING Hongqi,ZHONG Li,NI Yuxi,et al.Thermal analysis of high power density laser diode stack coolingstructure[J]. ChineseJournalof Luminescence,2016,37(1):81-87.