Stroboscopic illumination image acquisition method and influence of the paint pulse luminescence time
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摘要:
提出了频闪照明图像采集方法来解决压力敏感涂料测量技术应用于旋转模型的图像采集问题,根据该方法组建了测量系统。以小型风扇为对象开展了图像采集实验,探索了涂料脉冲发光时间对图像质量影响。结果表明:图像运动模糊长度不超过4像素时,图像的清晰度与静止状态的参考图像基本一致。在总涂料发光时间一致时,涂料脉冲发光时间越短,图像噪声水平越小,信噪比越高,适用于较高轮缘速度的旋转对象。
Abstract:A method of image acquisition method based on stroboscopic illumination was proposed for measurement of pressure sensitive paint applied to rotating model. In accordance with this method, a measurement system was developed. A small fan was used as the object for the image acquisition experiment, which examined the influence of the paint pulse luminescence time on the quality of the image. The results showed that: when the image motion blur length was not greater than 4 pixels, the image clarity was essentially the same as the reference image in the static condition; with a consistent total paint luminescence time, the shorter paint pulse luminescence time indicated the lower image noise level and the higher signal-to-noise ratio, making it suitable for rotating objects with high speed.
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表 1 图像采集方案
Table 1. Image acquisition scheme
序号 ${t_{\mathrm{p}}}$/${\text{μs}}$ N ${t_{\mathrm{c}}}$/s 1 0.5 540 12 2 2 135 3 3 5 54 1.2 4 10 27 0.6 5 18 15 0.33 6 27 10 0.22 7 45 6 0.13 8 54 5 0.11 9 67.5 4 0.09 -
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