基于红外反射式光电探测点阵的非接触人机交互系统
发布时间：2019-06-26 12:58
【摘要】：医院手术室是严格控制在无菌环境下的,使用鼠标、键盘、触摸屏等接触式交互设备对医疗设备进行操作,易导致细菌传播,带来安全隐患。以光学感应为基本原理的非接触交互设备能很好的应用于手术室这样的无菌环境。但是目前主流的光学感应非接触交互设备都是以摄像头为传感器,当环境光照比较弱时工作会受到影响,而且需要复杂的软硬件对图像数据进行处理。本文针对这些问题,提出了一种新型的基于红外反射式光电探测点阵的非接触人机交互系统构建方案,该方案是使光电探测点阵在其前方空间形成一个光场,利用进入光场的交互主体对红外光的发射,对其进行定位和跟踪,进而实现交互动作的识别。本文针对非接触人机交互系统需要解决的两个关键技术问题:抗背景光干扰能力和高分辨力,分别展开了研究。采用红外调制发射和锁相放大解调的方法,有效提高了系统抗背景光干扰能力,采用A/D转换器精确量化采集到的反射红外光信号强度,并结合质心算法计算交互主体的位置坐标,提高了系统的分辨力。论文完成了光电探测点阵的构建,对各部分硬件电路进行了设计和测试,并结合硬件编写了微控制器程序和基于Windows操作系统的上位机软件。最终实际研制出一套基于红外反射式光电探测点阵的非接触人机交互系统。经测试,本课题研制的红外非接触人机系统具有良好的抗背景光干扰能力,可以在各种光照条件下工作,分辨力可达0.25mm,响应速度为100fps,工作距离为4-10cm,可在一定程度上满足实际应用需求。
[Abstract]:Hospital operating room is strictly controlled in aseptic environment, using mouse, keyboard, touch screen and other contact interactive equipment to operate medical equipment, which can easily lead to bacterial transmission and bring hidden dangers to safety. The non-contact interactive equipment based on optical induction can be well used in aseptic environment such as operating room. However, at present, the mainstream optical induction non-contact interactive equipment is based on the camera as the sensor, when the ambient light is weak, the work will be affected, and complex software and hardware are needed to process the image data. In order to solve these problems, a new type of contactless human-computer interaction system based on infrared reflection photoelectric detection lattice is proposed in this paper. the scheme is to make the photoelectric detection lattice form a light field in front of it, and to locate and track the infrared light by using the interactive subject entering the light field, so as to realize the identification of interactive action. In this paper, two key technical problems to be solved in contactless human-computer interaction system, anti-background light interference ability and high resolution, are studied respectively. The infrared modulation transmission and phase-locked amplification and demodulation methods are used to effectively improve the anti-background light interference ability of the system. The intensity of reflected infrared light signal collected by A / D converter is accurately quantified, and the position coordinates of the interactive subject are calculated by combining the centroids algorithm, which improves the resolution of the system. In this paper, the photoelectric detection lattice is constructed, each part of the hardware circuit is designed and tested, and the microcontroller program and the upper computer software based on Windows operating system are written in combination with the hardware. Finally, a set of contactless human-computer interaction system based on infrared reflection photoelectric detection lattice is developed. The results show that the infrared non-contact man-machine system developed in this paper has good anti-background light interference ability, can work under various light conditions, the resolution can reach 0.25 mm, the response speed is 100 fpsand the working distance is 4 鈮，
本文编号：2506196
[Abstract]:Hospital operating room is strictly controlled in aseptic environment, using mouse, keyboard, touch screen and other contact interactive equipment to operate medical equipment, which can easily lead to bacterial transmission and bring hidden dangers to safety. The non-contact interactive equipment based on optical induction can be well used in aseptic environment such as operating room. However, at present, the mainstream optical induction non-contact interactive equipment is based on the camera as the sensor, when the ambient light is weak, the work will be affected, and complex software and hardware are needed to process the image data. In order to solve these problems, a new type of contactless human-computer interaction system based on infrared reflection photoelectric detection lattice is proposed in this paper. the scheme is to make the photoelectric detection lattice form a light field in front of it, and to locate and track the infrared light by using the interactive subject entering the light field, so as to realize the identification of interactive action. In this paper, two key technical problems to be solved in contactless human-computer interaction system, anti-background light interference ability and high resolution, are studied respectively. The infrared modulation transmission and phase-locked amplification and demodulation methods are used to effectively improve the anti-background light interference ability of the system. The intensity of reflected infrared light signal collected by A / D converter is accurately quantified, and the position coordinates of the interactive subject are calculated by combining the centroids algorithm, which improves the resolution of the system. In this paper, the photoelectric detection lattice is constructed, each part of the hardware circuit is designed and tested, and the microcontroller program and the upper computer software based on Windows operating system are written in combination with the hardware. Finally, a set of contactless human-computer interaction system based on infrared reflection photoelectric detection lattice is developed. The results show that the infrared non-contact man-machine system developed in this paper has good anti-background light interference ability, can work under various light conditions, the resolution can reach 0.25 mm, the response speed is 100 fpsand the working distance is 4 鈮，
本文编号：2506196
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