Detection system and device, measurement method and temperature and humidity compensation method

Abstract

An air quality detection system relates to the field of gas detection. The system comprises a single-chip microcomputer, a temperature and humidity sensor and a gas sensor, the single-chip microcomputer is connected with the temperature and humidity sensor and the gas sensor, the temperature and humidity sensor is used for obtaining temperature and humidity information, the gas sensor is used for obtaining the VOC concentration of air, and after the single-chip microcomputer obtains the temperature and humidity information and the VOC concentration, the VOC concentration of air is compensated and calibrated according to the temperature and humidity information. On the basis that the single-chip microcomputer obtains the temperature and humidity information and the VOC concentration of the gas, according to the existing defect that the moisture content affects the measurement of the VOC concentration, the single-chip microcomputer further carries out compensation operation on the VOC concentration of the gas based on the temperature and humidity information, so that the single-chip microcomputer obtains a more accurate VOC concentration value of the gas after operation, and the accuracy of a system result is improved. The invention further discloses a measurement method and a temperature and humidity compensation method.

Description

Technical field[0001]The present invention relates to the field of gas detection, and more particularly to a detection system, apparatus, and a method of measurement, temperature and humidity compensation method.Background technique[0002]The gas sensitive material in the gas sensor is at a high temperature, and the resistance value is varied as the VOC content (concentration) in the mixed gas, and the VOC content (concentration) is indirectly obtained by measuring the gas sensitive material resistance (gas sensitive), However, in practical applications, the gas sensitive resistance is also affected by the moisture content in the mixed gas.Inventive content[0003]The present invention is directed to overcoming at least one defect (deficiencies) of the prior art, providing a detection system, device, and a measurement method thereof, a temperature and humidity compensation method, making the microcontroller more accurate gas VOC concentration.[0004]The technical solution taken by the p...

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Problems solved by technology

[0002]The resistance value of the gas sensitive material in the gas sensor changes with the VOC content (concentration) in the mixed gas at high temperature. By measuring the resistance of the gas sensitive material value (gas-sensitive resistor) to indirectly obtain the VOC content (concentration), but in practical applications, the gas-sensitive resistor is also affected by the moisture content in the mixed gas

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