基于红外扫描手势识别电路的研究

Research on recognition algorithm based on infrared scanning gesture

手势识别是一种有效、常见的人机交互手段,因而被广泛应用于智能家居和手机操作中。采用红外放大驱动电路、模拟选择开关、微分放大阈值比较电路以及4对红外发射/接收对管等设计一种窄脉冲、大电流驱动红外发射管的电路系统。该电路结构简单、成本低。通过分区轮流驱动红外发射扫描,可以避免不同区域红外光之间的相互干扰;利用较大瞬时电流、但极低占空比的窄脉冲驱动红外发射管,可以大大提高手势识别距离,减少红外管的使用寿命。通过在实验中分别设置了4、6、8、10、11、12、13cm共7种检测距离,对此手势识别系统进行了检验,结果表明其识别距离远、识别性能可靠。

Gesture recognition is an effective and common human-computer interaction method and is therefore widely used in smart home and mobile phone operations.Infrared amplification drive circuit,analog selection switch,differential amplification threshold comparison circuit,and four pairs of infrared transmit/receive pairs are designed to design a narrow-pulse,high-current driving infrared emission tube circuit system.The circuit has a simple structure and low cost.By partitioning the infrared emission scans in turn,mutual interference between infrared light in different regions can be avoided.Utilizing a narrow pulse-driven infrared emission tube with a large instantaneous current but extremely low duty cycle can greatly increase the distance of gesture recognition and reduce the service life of the infrared tube.Through the experiment,four detection distances of 4,6,8,10,11,12,and 13 cm were set up respectively.The gesture recognition system was tested and it was found that the recognition distance is far and the recognition performance is reliable.