加速度计的发展拓宽用户选择
导致加速度计技术迅速发展的因素有很多。首先,这类设备的市场不断扩大,特别是在汽车、消费和医疗电子产品方面,在这种情况下,加速计能帮助产品在市场上取得成功。例如,自动碰撞通知(ACN)系统,动作感应游戏控制器和智能手机,和惯性测量footpods运行性能都欠他们的存在一个新的高度紧凑的加速度计的品种。
从技术的角度来看,正是微电子机械系统(MEMS)技术的成熟,导致了越来越多的MEMS铸造厂在更小和更小的封装中广泛使用可靠的设备。此外,MEMS设计受益于数字电子技术的结合不仅提高其性能,同时也简化了他们的整合到最终的系统。这种设备的可用性,产生了新一代的环保型电子系统,同时也带来了更好的产品,服务于工业应用中的传统功能。
Single-axis accelerometers
Accelerometers are available today that can measure acceleration in one axis (x, y, or z) only, or in two or three axes simultaneously. An excellent example of a precision single-axis accelerometer designed for automotive control applications is the SCA620-CF8H1A from VTI technology (Figure 1)。 Based on the company’s capacitive 3D-MEMS technology, it is intended for use as a z-axis sensor and is designed for high reliability, accuracy, and stability over temperature and time, for precise measurement of acceleration, inclination, motion, or vibration. The AEC Q-100-qualified device has a measurement range of ± 1.7 g with 1.2 V/g sensitivity, provides an analog (0 to 5 V) output that is ratio-metric (that is, the output value depends on the value of the input supply voltage), and can withstand shocks to 20,000 g.
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