用于监测飞机寿命的主动传感器融合

　　用于监测飞机寿命的主动传感器融合

　　主动式传感器系统正在成为飞机设计中一个日益重要的因素。整理载荷，应变，温度和压力数据，可以给出一个更详细的历史，在飞机上的不同组件的状态，并给出问题的早期迹象。本文着眼于不同的传感器技术，可用于在飞机上使用传感器和模拟设备，飞思卡尔半导体，德克萨斯仪器，TE连接和欧姆龙的转换技术监测。

　　传感器融合是一个日益重要的要素是系统设计。集成多个传感器与微控制器或微处理器来处理更多方面的系统控制在传感器接口是提高可靠性和准确性，同时降低功耗。所有的这一切都是航空电子传感器系统设计的一个积极的行动。这已经发生的传感器融合的MEMS加速度计和压力传感器的惯性导航，也可以用来整合更多的数据从机身周围。这为维护和控制提供了更多的数据，降低了运行飞机的总成本，并允许组件在被降级之前被替换。

　　A sensor fusion system can be built using devices such as the AD7476/AD7477/AD7478 from Analog Devices coupled with a microcontroller. These are 12-， 10-， and 8-bit， high speed， low power， successive approximation ADCs in six lead SOT23 packages for minimal weight and size. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. Each part contains a low noise， wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 6 MHz， making them suitable for sensors such as temperature and strain.

　　The conversion process and data acquisition are controlled using the serial clock， allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of the clock and the conversion is initiated at this point. There are no pipeline delays associated with these parts.

　　The AD7476/AD7477/AD7478 （Figure 1） use advanced design techniques to achieve very-low power dissipation at high throughput rates， helping reduce weight for an avionics design. The reference for the parts is taken internally from VDD which allows the widest dynamic input range to the ADC so the analog input range for the parts is 0 V to VDD.