1results about How to "Effectively remove interference" patented technology

The application provides a gas concentration detection method and device, terminal equipment and medium, comprising: obtaining an original spectrum absorption signal of a to-be-detected gas; performing filtering and smoothing processing on the original spectrum absorption signal, and extracting an upper envelope line of the processed signal; identifying a gas non-absorption wave band in the upper envelope line, calculating a reference amplitude value according to the maximum value and the minimum value of the envelope line in the gas non-absorption wave band; constructing a baseline according to the reference amplitude value, and determining a target gas absorption segment on the upper envelope line by using the baseline; taking the length of the target gas absorption segment as a concentration inversion characteristic value representing the gas absorption intensity, and detecting the gas concentration of the to-be-detected gas based on a pre-constructed concentration inversion model and the concentration inversion characteristic value. The application can improve the accuracy of gas concentration measurement.