SYSTEM AND METHOD FOR MEASURING ELECTROMOBILITY PARTICLE-SIZE SPECTRUM OF AEROSOL

摘要

A system and method for measuring an electromobility particle-size spectrum of an aerosol. The measuring system comprises: a bipolar charge electric appliance, a differential electromobility analyzer (2), a sheath gas control system (3), a positive and negative high voltage module (5), a particle counter (6), and a data collecting and processing module (7). The bipolar charge electric appliance is connected to the differential electromobility analyzer (2) by means of a pipeline; the sheath gas control system (3) is connected to the differential electromobility analyzer (2) by means of two pipelines; moreover, the positive and negative high voltage module (5) provides a positive high voltage or a negative high voltage for the differential electromobility analyzer (2) by means of a high voltage wire (4); an outlet pipeline of the differential electromobility analyzer (2) is connected to the particle counter (6); the sheath gas control system (3), the positive and negative high voltage module (5), and the particle counter (6) are respectively connected to the data collecting and processing module (7) by means of data lines. According to a novel method and system for measuring the electromobility particle-size spectrum for the aerosol on the basis of alternating measurement of positive and negative charged particles, the measurement accuracy of an electromobility particle-size spectrometer can be significantly improved.