Design of intrinsically safe laser auxiliary light source for low-illumination video acquisitio
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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940 nm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20 m，功耗小于3 W，持续工作温度低于50 ℃。Abstract: 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 W and continuous working temperature below 50 ℃.
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期刊类型引用(3)
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百度学术
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3. 陈鹏，江欢，陈泳奇，梅梦雅，章俊伟. 服务于公共安全风险态势感知的冬奥会信息资源体系研究. 现代信息科技. 2021(12): 36-40 . 百度学术
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