用于監(jiān)測飛機壽命的主動傳感器融合

　　主動式傳感器系統(tǒng)正在成為飛機設計中一個日益重要的因素。整理載荷，應變，溫度和壓力數(shù)據(jù)，可以給出一個更詳細的歷史，在飛機上的不同組件的狀態(tài)，并給出問題的早期跡象。本文著眼于不同的傳感器技術(shù)，可用于在飛機上使用傳感器和模擬設備，飛思卡爾半導體，德克薩斯儀器，TE連接和歐姆龍的轉(zhuǎn)換技術(shù)監(jiān)測。

　　傳感器融合是一個日益重要的要素是系統(tǒng)設計。集成多個傳感器與微控制器或微處理器來處理更多方面的系統(tǒng)控制在傳感器接口是提高可靠性和準確性，同時降低功耗。所有的這一切都是航空電子傳感器系統(tǒng)設計的一個積極的行動。這已經(jīng)發(fā)生的傳感器融合的MEMS加速度計和壓力傳感器的慣性導航，也可以用來整合更多的數(shù)據(jù)從機身周圍。這為維護和控制提供了更多的數(shù)據(jù)，降低了運行飛機的總成本，并允許組件在被降級之前被替換。

　　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.