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MEMS传感器设计指南
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MEMS传感器设计指南
房地产指的是地点、地点、地点。但是我们到底在哪里？
就在25年前的水手们发现他们的位置使用一些有限的双曲线导航系统如罗兰当附近的土地，但在海上时，他们大多是依靠观察太阳和星星的古老技术。GPS的出现意味着完全未经训练的领航员可以得到他们的位置在几英尺秒，少于一个六分仪的成本。在过去的几年中，这项技术已经进入汽车甚至电话。
然而，消费者需要更多的信息。任天堂的Wii®表明相对位置和设备的运动往往是绝对的经度和纬度一样重要。虽然通过陀螺仪惯性导航具有悠久的历史，它一直非常昂贵，只适合最专业的应用，如导弹和大飞机。但是，微机电系统（MEMS–又名日本在欧洲或微微系统技术）已经降低了尺寸、重量、功耗和成本要求到微不足道的水平。
MEMS pushed the semiconductor revolution into the world of sensors， with all of the attendant benefits from Moore’s Law. Costs have come down so much that these sensors have found roles in unexpected places. They are used to detect head impacts in football helmets. Some sense a car crash to unlock doors and deploy airbags， and others put a disk drive in a protected state when it experiences a high-g force shock. They can sense tilt in industrial equipment to warn of a safety violation. Some athletic shoes incorporate these products to log exercise activity. The holy grail of portable electronics today is power management to extend battery life， and a MEMS sensor can sense that a device is not being used， and put it into a sleep mode. By measuring rotation， it is possible to stabilize images in a camera or pair of binoculars. Vibration sensors are used to detect impending bearing failures， seismic events， or a security issue such as a window being broken. Tilt information is often used in cameras to detect the horizon， or in tablets and phones to detect orientation. The number and types of applications of MEMS sensors is limited only by the imagination. One can envision swarms of autonomous systems used to sense position and attitude， and indeed most drones do employ them today.
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