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1. 广东工业大学 机电工程学院,广东 广州,510006
2. 佛山市质量计量监督检测中心,广东 佛山,528000
纸质出版日期:2018-3-5,
网络出版日期:2017-10-12,
收稿日期:2017-6-29,
修回日期:2017-9-18,
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骆伟岸, 王晗, 陈新度等. 三通道PWM的数控调光调色方法[J]. 发光学报, 2018,39(3): 414-421
LUO Wei-an, WANG Han, CHEN Xin-du etc. A Digital Dimming Color and Intensity Method of Three-channel LED[J]. Chinese Journal of Luminescence, 2018,39(3): 414-421
骆伟岸, 王晗, 陈新度等. 三通道PWM的数控调光调色方法[J]. 发光学报, 2018,39(3): 414-421 DOI: 10.3788/fgxb20183903.0414.
LUO Wei-an, WANG Han, CHEN Xin-du etc. A Digital Dimming Color and Intensity Method of Three-channel LED[J]. Chinese Journal of Luminescence, 2018,39(3): 414-421 DOI: 10.3788/fgxb20183903.0414.
针对目前机器视觉光源存在工作时间长、需要现场工作人员手动调试、发热严重、适应能力差等问题,提出了一种基于PWM的数字控制光源,建立了混色光下三通道占空比与光照度的函数关系,分8种情况讨论,并分析了该模型的局限性。从调光原理、驱动原理和控制原理3方面详细说明了该数控光源的实现方法,并且对本文提出的数学模型进行了4种有代表性的实验测试。实验结果表明,该数学模型能满足大多数比例的混光模型,实现光源颜色、照度可调,上述问题均可得到良好的解决,同时提高光源寿命、节约能源。
In machine vision
there are many problems exist in light-source
like long running times
manual debugging
heating seriously and poor adaptability. Accordingly
a digital dimming method of light source was proposed based on PWM technology
which was divided into eight situations. The limitation of this model was pointed out and the principals of the digital light-source was declared from three aspects:dimming theory
control theory as well as driving theory. In the meanwhile
four representative experiments were showed out. The results show that this method can satisfy most proportion of the mixed light models
and realize the adjustment of color as well as the change of illumination. With the function of trigger control
the above problems can be solved properly
at the same time
postponing aging of light-source and energy saving can be achieve as well.
光源机器视觉PWM混光LED
light sourcemachine visionPWMmixed lightLED
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