小型水雾投影系统的研制及优化

Design and Optimization of a Compact Water Mist Projection System

设计并制作了一套小型水雾投影装置,实现了基本的成像功能。通过测量水雾密度分布,建立了屏幕的宏观物理模型,仿真发现具有类3D的成像效果,与实验现象一致。为了优化成像效果,对仪器中雾化器、涡轮风扇和环流风扇分别进行了测试。结果表明,雾化器数量、涡轮风扇和环流风扇的两端电压均与水雾屏幕的成像效果成正比,但当涡轮风扇和环流风扇两端电压过大时易破坏水雾屏幕的稳定性。因此实验中设置雾化器数量为单位体积内最多,涡轮风扇两端电压稍小于阈值电压,环流风扇电压由供电方波的占空比控制,实验中设置为0.8。此外,结合手势识别技术,利用水雾的可穿透性,使水雾屏具有更好的趣味性和交互性。

A compact water mist projection device is designed and constructed to achieve image displaying. The microscopic physical model of the screen is established by measuring the density distribution of the water mist. The 3D imaging perform- ance is achieved by the simulation, which is in accordance with the experimental result. In order to optimize the image show- ing performance, the atomizer, turbofan, and circulation fan are tested respectively. The result shows that the atomizer quantity, the voltage of the turbofan and circulation fan are proportional to the image showing performance. However, the stability of the water mist screen will be destroyed when the voltage of the turbofan and circulation fan is too large. There- fore, the number of atomizers is set to the largest in the unit volume. The voltage of turbofan is set to slightly less than the threshold. The voltage of circulation fan is controlled by the duty radio of the power supply square-wave, which is set to 0. 8 in the experiment. In addition, using penetrability of the water mist, the device shows more interactivity and fun with the combination of gesture recognition technology.