Aiming at the problems of low monitoring precision

few indexes and great difficulty in trace gas detection exist in traditional indoor air monitoring system

a miniature indoor trace gas monitoring system with high precision sensor array as the core is designed. The system builts up and optimizes the gas sensor array

designs high-reliability power supply and high-precision acquisition unit

optimizes the detection amount through BP neural network

optimizes the sensor calibration result by least squares method

and realizes high-precision detection of indoor trace gas. The experiment and application show that the system has the advantages of high detection precision

complete detection index and good stability. It is suitable for monitoring indoor air quality in the home.