Charging-Based PN Sensing of Automotive Exhaust Particles

Proceedings

Longin, Matthias¹  Schriefl, Mario Anton²  Bergmann, Alexander³ 

[1] Author to whom correspondence should be addressed.;Institute of Electronic Sensor Systems, Graz University of Technology, 8010 Graz, Austria;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.

关键词: particle number;    diffusion charging;    photoelectric charging;   

DOI  :  10.3390/proceedings2130805

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Mobile measurement of particle number concentration (PN) in the exhaust of motor vehicles has recently become an integral part of emission legislation. Charge-based sensing techniques for the examination of PN, like Diffusion Charging (DC), represent a promising alternative to condensational particle counters (CPCs) as established PN sensors, because they enable to build robust, compact and energy efficient systems. However, due to the charging process, particle properties like size and morphology have a big impact on the sensor’s PN response. For particles of different size and shape we experimentally investigated those impacts using own-built charging-based sensors. The PN response of the DC sensor showed desired behavior for compact NaCl particles, but less satisfying behavior for combustion aerosol standard (CAST) particles, which is a widely used test aerosol for automotive applications. With a photoelectric charger, the PN response of CAST particles was significantly better.

【 授权许可】

CC BY