摘要
针对在线图像可视铁谱（on—line visual ferrograph，OLVF）反射光源亮度低、照明不均匀影响铁谱成像质量的问题，提出了一种用于oLVF探头的LED阵列反射光源。该反射光源为圆环形LED阵列结构，由8颗0．1W小功率LED组成。基于照明均匀性理论与仿真分析，确定了反射光源结构参数、安装高度及均匀照明区域大小；利用TracePro仿真计算了光源在磨粒沉积区域的照度均匀性。实验结果表明：圆环形LED阵列反射光源的照明均匀性较好，磨粒沉积区域的辐照度分布为130～150w／m2，其光通量为56．64lm，显色指数为82．6，色温为6376K，功率为0．3361W，符合OLVF的低功耗、高亮度、均匀性照明等要求，铁谱成像质量得到了提高，有利于磨粒形貌观测与视觉特征信息提取。
A new reflecting light based on LED arrays is presented to solve the problem of ferro- imaging quality that is affected by the lower-brightness and non-uniform illumination of the original reflecting light. The new reflecting light is designed for on-line visual ferrograph （OLVF）, and has a configuration of circular ring LED array composed with eight 0. 1 W low- power LEDs. The theoretical and simulation analyses of uniformity illumination are used to determine geometrical parameters, the installing positions and the range of uniform illumination area. The irradiance distribution of the circular ring LED array is analyzed and calculated by TracePro to validate the characteristics of uniformity illumination on the middle of wear debris deposition zone. Experimental results show that the new reflecting light achieves a better uniformity illumination, its irradiance distribution ranges from 130 to 150 W/m2 , luminous flux is 56.64 lm, color rendering index is 82.6, color temperature is 6 376 K and power is 0. 336 1 W. The performance requirements such as lower power consumption, high-brightness and uniform illumination have been achieved, and ferro-imaging quality is remarkably improved. The proposed reflecting light is applicable for OLVF to observe the morphology of wear debris and to extract the visual feature information.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2014年第10期29-34,共6页
Journal of Xi'an Jiaotong University
基金
国家重大科技专项资助项目(2011ZX04016-031)
