Particulate matter sensor calibration system

Abstract

The invention relates to a nano-scale and micron-scale particulate matter sensor calibration system. The system consists of a particulate matter generator, a diluting and mixing subsystem, a test box body and a data acquisition and analysis system, and can evaluate and calibrate particulate matter sensors of PM1.0, PM2.5, PM10 and the like. For measurement of the particulate matter sensors with different particle size range, corresponding particulate matter generators are adopted to generate polydisperse particulate matters; during calibration, the sensors are distributed in the test box body symmetrically, quick calibration of the particulate sensors is realized by the method for dynamically adjusting the concentrate of the particulate matters by adjusting different flow dilution ratio, and the calibration efficiency is improved; the measuring numerical values of the sensors are acquired in real time through a data acquisition mainboard and then are uploaded to a service side to perform storage and analysis; the system guarantees the sealing property of pipelines through clamping sleeve connection and rubber ring sealing; the test box body maintains micro-positive pressure test environment, so that the test environment is not influenced by the external environment.

Description

technical field [0001] The invention belongs to the technical field of environmental aerosols, and in particular relates to a calibration system for nanometer and micrometer particle sensors. Background technique [0002] The particle sensor calibration system can be applied to the field of calibration and performance evaluation of particle sensors or particle detectors. Emily G.Snyder et al. (Environ.Sci.Technol.,47:11369-11377,2013) believed that under the development trend of high temporal and spatial resolution air quality monitoring models, low-cost particle sensors will play a huge role, how to calibrate such sensors It is of great significance to obtain credible monitoring data. [0003] At present, in the research on the calibration system of particle sensors at home and abroad, most of them use high-precision particle concentration detection equipment as a reference instrument, and measure a certain concentration of particles synchronously with the object to be mea...

AI Technical Summary

Problems solved by technology

[0004] There are few domestic studies on the calibration system of particulate matter sensors. Due to the single aerosol generation technology, generally only PM 2.5 Calibration of sensors, such as a Chinese patented multi-channel PM 2.5 Monitor calibration device (publication number 103674796A); and a Chinese invention patent for a particle sensor calibration system (publication number 204831977U) and an automatic calibration device for on-line monitoring of dust concentration (publication number 105547948A). The aerosol used in the former is the carbon generated by combustion Smoke and particulate matter are special and limited in scope of application, while the latter lacks an independent aerosol generating device, does not form a calibration system, and uses a relatively passive

Images