人机界面设计中的触摸传感技术

　　人机界面设计中的触摸传感技术

　　随着工业环境中更多的计算能力，人机界面有更多的选择。触摸传感器和触摸屏的多传感器技术正变得越来越流行，而其他技术，如电容式触控轮和接近传感器是看到更多的采用。

　　越来越多的工业设备需要一个更复杂的界面、按钮和开关的滑动条控制更换车轮，和触摸屏。提供一个坚固的界面，可以很容易地集成到更先进的控制系统，并仍然很快地在车间使用，是一个广泛的设备至关重要。

　　有广泛的选择不同的触摸屏控制器，而在工业应用中，功耗并不一定像便携式消费设备一样重要。然而，保持低功耗降低了温度，提高了可靠性，并有可能降低运行成本。也有广泛的便携式设备使用在工厂的地板上，特别是在测试中，功耗是至关重要的。同样，一个设备的电磁性能可能不是消费设备的问题，但在嘈杂的工业环境中是至关重要的。降低EMI易感性和减少界面排放的技术都是关键的设计因素。

　　Capacitive controllers have become much more popular with the advent of the Apple iPod control wheel， some of which is based around technology from Cypress Semiconductor. The capacitive technology helps in the industrial environment as the sensor can be covered. This technology functions by detecting changes in the electric field caused by the presence of another field such as a finger. However， these sensors can struggle with gloved fingers， so resistive contacts can be helpful in these situations. This distinction is continued with touchscreens. Capacitive screens are common up to 10 inches， but resistive screens can handle larger screen sizes and even gloves.

　　Proximity capacitive touch sensors in simple linear or rotational sliders offer significant advantages for industrial interfaces. With no moving parts to wear out and easily sealed to offer protection from harsh environments， they are more reliable， more energy efficient， and are more easily integrated to create an intelligent system.