基于手势的用户界面——超越多点触摸的一步?
触摸屏控制在整个工业中被广泛采用,作为一种方便而可靠的媒介,用户可以通过它与复杂的设备进行交互,这些设备被设计成自动化过程和进行人类无法做到的工作。然而,在卫生优先的情况下,触摸屏是不现实的,例如在食品工业或医疗保健中,或在手套被保护的地方。
如果工人必须与食品生产设备互动,触摸屏表面的接触会传播污染。类似地,当设置诸如透析机之类的医疗设备时,用户每次使用触摸屏后可能需要更换手套。在工业场景中,必须戴厚防护手套,传统的电容式触摸屏可能无法正确响应,否则可能会碰到错误的按钮。如果手套必须拆除使用设备,这可能危及安全和生产力。
三维(3D)手势识别,如手跟踪和方法检测可以解释命令,而无需用户触摸传感器的表面。有能力控制设备采用天然的手,在自由空间的手指动作可以帮助设备设计克服了传统电容式触摸屏的缺点。
Optical gesture recognition, using techniques such as pattern analysis or time of flight measurements, is used in game controllers to detect whole body movement, and can be used for 3D hand gesture recognition at close range as a touchscreen alternative. However, if implementing optical gesture recognition in a control panel, holes or cutouts may be needed for light sources and detectors. Moreover, multiple sources and/or receivers may be needed, which can add cost and complexity.
Electrical near-field (E-field) sensing is an alternative approach using electrodes embedded in a front panel or integrated with a display. Various gestures can be detected, such as an approaching hand, swipes or edge flicks to control movements or make next/previous selections, and circular gestures for commands such as controlling clockwise/counterclockwise rotation.
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