Particulate Detection Correction Coefficients for Cross-Interference

The patent applies preliminary action by pre-calculating correction coefficients for different particulate sizes before actual measurement. The system stores correction coefficients corresponding to different particulate sizes, which are calculated in advance based on the light intensity distribution characteristics. During measurement, these pre-prepared correction coefficients are used to correct the detected light intensities, eliminating the need for real-time complex calculations and enabling accurate differentiation of particulate sizes despite cross-interference.

The patent changes the parameter of light intensity by introducing correction coefficients that account for the non-uniform light intensity distribution in the detection chamber. Instead of directly using the raw detected light intensity to determine particulate size, the system multiplies the detected intensity by the corresponding correction coefficient to obtain a corrected intensity value. This parameter transformation enables accurate particulate size classification even when small-size particulates are misjudged as large-size particulates due to intensity variations.

The patent applies universality by designing a single detection chamber that can detect multiple particulate size ranges (PM1.0, PM2.5, PM10) simultaneously. Instead of using separate detection chambers for different particulate sizes, the system uses one chamber with a laser source and detector that can measure light intensities scattered by particulates of various sizes. By introducing correction coefficients and using calculation units, the single chamber achieves multi-channel measurement functionality, reducing device complexity and cost while maintaining the ability to simultaneously output concentrations of different particulate sizes.

The patent uses copying by creating a computational model that replicates the function of multiple physical detection chambers. Instead of building three separate physical chambers for PM1.0, PM2.5, and PM10 detection, the system copies the detection principle into a unified chamber and uses correction coefficients to simulate the differentiated measurement results. The calculation unit processes the single detected light intensity value and generates multiple concentration outputs, effectively copying the multi-channel measurement capability through software algorithms rather than physical duplication.