【摘要】：醫(yī)院手術(shù)室是嚴(yán)格控制在無菌環(huán)境下的,使用鼠標(biāo)、鍵盤、觸摸屏等接觸式交互設(shè)備對醫(yī)療設(shè)備進(jìn)行操作,易導(dǎo)致細(xì)菌傳播,帶來安全隱患。以光學(xué)感應(yīng)為基本原理的非接觸交互設(shè)備能很好的應(yīng)用于手術(shù)室這樣的無菌環(huán)境。但是目前主流的光學(xué)感應(yīng)非接觸交互設(shè)備都是以攝像頭為傳感器,當(dāng)環(huán)境光照比較弱時(shí)工作會受到影響,而且需要復(fù)雜的軟硬件對圖像數(shù)據(jù)進(jìn)行處理。本文針對這些問題,提出了一種新型的基于紅外反射式光電探測點(diǎn)陣的非接觸人機(jī)交互系統(tǒng)構(gòu)建方案,該方案是使光電探測點(diǎn)陣在其前方空間形成一個(gè)光場,利用進(jìn)入光場的交互主體對紅外光的發(fā)射,對其進(jìn)行定位和跟蹤,進(jìn)而實(shí)現(xiàn)交互動作的識別。本文針對非接觸人機(jī)交互系統(tǒng)需要解決的兩個(gè)關(guān)鍵技術(shù)問題:抗背景光干擾能力和高分辨力,分別展開了研究。采用紅外調(diào)制發(fā)射和鎖相放大解調(diào)的方法,有效提高了系統(tǒng)抗背景光干擾能力,采用A/D轉(zhuǎn)換器精確量化采集到的反射紅外光信號強(qiáng)度,并結(jié)合質(zhì)心算法計(jì)算交互主體的位置坐標(biāo),提高了系統(tǒng)的分辨力。論文完成了光電探測點(diǎn)陣的構(gòu)建,對各部分硬件電路進(jìn)行了設(shè)計(jì)和測試,并結(jié)合硬件編寫了微控制器程序和基于Windows操作系統(tǒng)的上位機(jī)軟件。最終實(shí)際研制出一套基于紅外反射式光電探測點(diǎn)陣的非接觸人機(jī)交互系統(tǒng)。經(jīng)測試,本課題研制的紅外非接觸人機(jī)系統(tǒng)具有良好的抗背景光干擾能力,可以在各種光照條件下工作,分辨力可達(dá)0.25mm,響應(yīng)速度為100fps,工作距離為4-10cm,可在一定程度上滿足實(shí)際應(yīng)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，

本文編號：2506196