Low-cost calibration system for multiple air quality monitoring sensors

Abstract

A low-cost calibration system for multiple air quality monitoring sensors comprises a machine cabinet, a calibration cabin and a static pressure box, wherein the machine cabinet is used for providing polluted gas with set concentration and controlling the speed of calibration gas, the calibration cabin is arranged at the upper end of the machine cabinet, communicated with the machine cabinet and provided with the calibrated sensors, and the static pressure box is connected with the upper end of the calibration cabin through a first flange; a flow equalizing film is arranged in the static pressure box, one side of the static pressure box is connected with one end of an air feeding pipe through a second flange, the other end of the air feeding pipe is connected with an air outlet of an air feeding regulation device, an air inlet of the air feeding regulation device is connected with a filtering device through an air director, a polluted gas filling pipeline used for guiding polluted gas with set concentration into the air feeding pipe from the machine cabinet is arranged between the machine cabinet and the air feeding pipe, and a stainless steel flow equalizing net used for equalizing airflow is arranged on a channel between the calibration cabin and the static pressure box. The system mainly aims to achieve scientific calibration of cheap sensors, performances of cheap sensors can be improved remarkably, and cost performance of sensors can be improved exponentially.

Description

technical field [0001] The invention relates to a calibration system. In particular, it relates to a low-cost multi-air quality monitoring sensor calibration system. Background technique [0002] A large number of shocking facts prove that indoor air pollution has become an "invisible killer" that endangers human health, and it has also become a common concern of all countries in the world. Especially in China's current domestic air pollution is more serious, among which indoor PM2.5 particulate matter pollution is an indoor pollutant that people are generally worried about due to the impact of outdoor atmospheric PM2.5 pollution. Data show that in 2013, only 5 of the 74 major cities in the country achieved an annual average of PM2.5 below 35 μg / m3, and the demand for indoor particle pollution purification is increasing day by day. PM2.5 mainly causes damage to the respiratory system and cardiovascular system, including respiratory tract irritation, coughing, dyspnea, redu...

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Problems solved by technology

And the calibration device (CN 102565177A) mentions that the object to be generated is placed in the storage material and then blown out by gas, and the point of view of uniformity and stability is not even mentioned.

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