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首页> 外文会议>Photonics in Measurement >Microoptical Sensor for Integration in a Functional Spark Plug for Combustion Analysis by UV-Laser Inducted Fluorescence Spectroscopy
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Microoptical Sensor for Integration in a Functional Spark Plug for Combustion Analysis by UV-Laser Inducted Fluorescence Spectroscopy

机译：微光学传感器，集成在功能性火花塞中，可通过紫外激光诱导荧光光谱法进行燃烧分析

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For development and optimization of the combustion process in engines it is vital to get time-resolved information about fuel concentrations and temperatures in the area of ignition. Fluorescence spectroscopy is an approved method for this task. Special tracer substances are added to the fuel and excited by UV-laser pulses. The goal is to work in close-to-production engines without geometric modifications. The influence of the optical sensor on the combustion process must be minimal. For this reason the combustion chamber is accessed by a modified spark plug that fulfills its ignition function and has integrated microoptics, additionally. Two functions must be provided by these optics: (ⅰ) the spatially defined excitation of the tracer substances and (ⅱ) the collection of the emitted fluorescence light. The design is optimized for maximal detection efficiency and accounts for the requirements of the environment at high temperature and pressure. Another challenge is the high UV intensity needed for excitation. To simplify the handling of the sensor its interface to the outside optics is implemented by UV transmitting fibers. The design and its realization in a prototype are presented.
机译：为了开发和优化发动机中的燃烧过程，获取有关点火区域内燃料浓度和温度的时间分辨信息至关重要。荧光光谱法是完成此任务的一种认可方法。特殊的示踪物质被添加到燃料中，并被紫外线激光脉冲激发。目标是在不进行几何修改的情况下在接近生产的引擎中工作。光学传感器对燃烧过程的影响必须最小。因此，燃烧室可通过改进的火花塞进入，该火花塞可实现其点火功能并集成了微光学元件。这些光学器件必须提供两个功能：（ⅰ）示踪物质在空间上的激发，以及（ⅱ）发射的荧光的收集。该设计针对最大检测效率进行了优化，并考虑了高温和高压环境的要求。另一个挑战是激发所需的高紫外线强度。为了简化传感器的操作，它与外部光学器件的接口是通过紫外线传输光纤实现的。介绍了该设计及其在原型中的实现。

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