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Fiber Optic Oxygen Sensor Detection System for Harsh Environments of Aerospace Applications

机译：航空航天严酷环境中的光纤氧气传感器检测系统

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This paper describes the first successful fiber optic oxygen detection sensor systems developed for the Boeing Delta IV Launch Vehicle harsh environment of engine section. It illustrates a novel multi-point fiber optic microsensor (optrode) based on dynamic luminescence quenching that was developed for measuring oxygen leak detection for the space applications. The sensor optrodes employ the quenching by oxygen of the fluorescence from a ruthenium complex. These optrodes were fabricated using Ruthenium-based fluorescent indicator immobilized in a porous glass rod placed at the end of multimode fiber. The light from a blue LED is launched into the optrode via a fiber optic bundle and used as the excitation source. The optrode's fluorescent emission intensity in the range of 0% to 10% oxygen is measured as a function of time. The measuring system is based on high reliability and low cost. The system consists of four units: 1) temperature compensated oxygen optrodes combined with an optical setup, 2) multipoint sensor communication fiber optic network cable, 3) digital/analogue optoelectronic signal processing unit with built-in micro controller for control of data acquisition and processing, and 4) a laptop computer for data display and storage. In testing, the sensor exhibited excellent response time and reversibility. To qualify the sensors, performed detail investigation for thermal, humidity, temperature, vibration and accelerate testing for life expectancy of harsh environmental of engine section. Extensive networking using MatLab were carried out for lab and actual field demonstrations.
机译：本文介绍了为波音Delta IV运载火箭发动机部分的恶劣环境开发的首个成功的光纤氧气检测传感器系统。它说明了一种基于动态发光猝灭的新型多点光纤微传感器（光电二极管），该传感器是为空间应用测量氧气泄漏检测而开发的。传感器电极采用氧气对钌络合物发出的荧光进行猝灭。使用固定在多模光纤末端的多孔玻璃棒中的钌基荧光指示剂制造这些电极。蓝色LED发出的光通过光纤束射入光极，并用作激发源。氧在0％到10％范围内的荧光发射强度是时间的函数。该测量系统基于高可靠性和低成本。该系统由四个单元组成：1）带光学装置的温度补偿氧电极，2）多点传感器通信光纤网络电缆，3）具有内置微控制器的数字/模拟光电信号处理单元，用于控制数据采集和处理，以及4）用于数据显示和存储的便携式计算机。在测试中，该传感器表现出出色的响应时间和可逆性。为了使传感器合格，对热，湿度，温度，振动进行了详细调查，并加快了发动机部分恶劣环境的预期寿命的测试。使用MatLab进行了广泛的网络连接，用于实验室和实际现场演示。

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