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首页> 外文会议>Emissions measurement and testing, 2009 >Numerical Investigation of an Optical Soot Sensor for Modern Diesel Engines
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Numerical Investigation of an Optical Soot Sensor for Modern Diesel Engines

机译：现代柴油机光学烟尘传感器的数值研究

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摘要

It has been extensively evidenced that modern diesel engines generate a considerable amount of soot nanoparticles. Existing soot sensors are not suitable for such nanoparticles. Current standard gravimetric techniques are extremely insensitive to fine soot particles. Soot diagnostics developed for research purposes, e.g., laser induced-incandescence, do not provide quantitative characterization, and expanded practical applications of these techniques are hardly conceivable. This paper addresses this emerging need for monitoring nano-sized soot emissions. Here, we investigated the use of polarization modulated scattering (PMS) for soot sensing in engine environments. The technique involves 1) measuring laser scattering by soot particles at multiple angles while varying the polarization states of the incident laser beam, 2) determining multiple elements of the Mueller matrix from the measured signals, and 3) inferring properties of the soot particles from these elements. This paper details the sensing concept and the algorithm used to retrieve soot characteristics.
机译：大量证据表明，现代柴油发动机会产生大量的烟尘纳米颗粒。现有的烟尘传感器不适用于这种纳米颗粒。当前的标准重量分析技术对细烟灰颗粒极不敏感。为研究目的而开发的烟尘诊断，例如激光诱导白炽灯，不能提供定量特征，并且很难想象这些技术的扩展实际应用。本文提出了监测纳米烟尘排放的新兴需求。在这里，我们研究了极化调制散射（PMS）在发动机环境中烟灰感测中的使用。该技术包括：1）在改变入射激光束的偏振状态的同时，以多个角度测量烟尘颗粒的激光散射； 2）从测量的信号确定穆勒矩阵的多个元素，以及3）从这些信号推断烟尘颗粒的特性元素。本文详细介绍了感测概念和用于获取烟灰特征的算法。

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