Detection of Soot Using a Resistivity Sensor Device Employing Thermophoretic Particle Deposition
Detection of Soot Using a Resistivity Sensor Device Employing Thermophoretic Particle Deposition
复制标题
使用采用热泳粒子沉积的电阻率传感器装置检测烟灰
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
A. Spetz
中科院分区：
文献类型：
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作者：
D. Lutic;J. Pagels;R. Bjorklund;Peter Josza;J. Visser;A. Grant;M. Johansson;J. Paaso;P. Fägerman;M. Sanati;A. Spetz
结果报告的热泳沉积的碳烟颗粒的电阻率传感器作为柴油机排气颗粒的监测技术与潜在的提高检测限和灵敏度。具有与柴油机排气相似特性的碳烟由丙烷火焰产生并分阶段稀释。在240- 270 ℃的气流中的烟灰被收集在保持在相当低的温度105- 125 ℃的叉指电极结构上。达到可测量电阻值的时间延迟、随后的速率和电阻减小的幅度是电极中指状物之间的距离和含烟灰流的稀释程度的函数。还在真实的柴油机排气中进行了碳烟沉积和随后通过加热传感器支撑件的去除。我们的实验室系统和真实的柴油机排气的行为之间的良好的相似性被注意到。
Results are reported for thermophoretic deposition of soot particles on resistivity sensors as a monitoring technique for diesel exhaust particles with the potential of improved detection limit and sensitivity. Soot with similar characteristics as from diesel exhausts was generated by a propane flame and diluted in stages. The soot in a gas flow at 240–270C∘ was collected on an interdigitated electrode structure held at a considerably lower temperature, 105–125C∘. The time delay for reaching measurable resistance values, the subsequent rate, and magnitude of resistance decrease were a function of the distance between the fingers in the electrodes and the degree of dilution of the soot containing flow. Soot deposition and subsequent removal by heating the sensor support was also performed in a real diesel exhaust. Good similarities between the behavior in our laboratory system and the real diesel exhaust were noticed.