Traceable calibration device and method of partile number analyzers for vehicle emission

A traceable calibration device of particle number (PN) analyzers for vehicle emission, comprising:

• a particle generation system, a solenoid valve system, a particle growth system and a particle measurement system connected in sequence, wherein
• the particle generation system is used for generating different types of aerosol samples;
• the solenoid valve system is used for controlling various aerosol samples to quantitatively enter the particle growth system;
• the particle growth system is used for classifying different types of aerosol samples to obtain monodisperse aerosol samples, doubly-charged-particle aerosol samples and triply-charged-particle aerosol samples, determining concentrations of the three aerosol samples, and obtaining grown particle samples by controlling the growth speed of the monodisperse aerosol samples through temperature adjustment;
• the particle measurement system is used for measuring the grown particle samples to obtain output electrical current, PN concentration;
• and the solenoid valve system is configured with seven electromagnetic valves, and the different types of solid aerosol samples comprise polystyrene, NaCl, silver (Ag) and soot.