Soil heavy metal detection method and system

Abstract

The invention discloses a soil heavy metal detection method and system, the detection method combines near infrared spectrum analysis and hyperspectral imaging technology, The method comprises the following steps: firstly, acquiring a picture and a spectral image of soil, then extracting spectral feature data from the spectral image, and calculating the spectral feature data and spectral feature data in a spectral library to obtain a spectral angle; determining the similarity between the two spectral angles according to the size of the spectral angle, so that the type of the soil heavy metal is qualitatively analyzed; then quantitatively calculating the concentration of the soil heavy metal according to a preset linear regression equation calculation formula of spectral characteristic data and absolute concentration. The detection system comprises a flight device, an analysis system, an optical camera, a multispectral sensor and a GPS positioning system that are carried on the flight device; and a spectrum library is arranged in the analysis system. The detection system matched with the method has the advantages of rapidness, no damage and large-area detection and monitoring, and has a wide application prospect in soil pollution detection and monitoring.

Description

technical field [0001] The invention relates to the technical field of soil heavy metal detection, in particular to a soil heavy metal detection method and system. Background technique [0002] At present, the standard methods for soil heavy metal detection are still based on laboratory confirmatory analysis, such as atomic absorption spectrometry (atomic absorption spectrometry, AAS), atomic fluorescence spectrometry (atomic fluorescence spectrometry, AFS), inductively coupled plasma emission spectrometry ( induced coupled plasma optical emission spectrometry (ICP-OES), inductively coupled plasma mass spectrometry (induced coupled plasma mass spectrometry, ICP-MS), wavelength dispersion X-ray fluorescence spectrometry (wavelength dispersion X-ray fluorescence, WDXRF), etc. However, the above methods require complex and time-consuming sample preparation, digestion or extraction, or large instrument size and complex and sophisticated hardware configuration, which cannot be us...

AI Technical Summary

Problems solved by technology

However, the above methods require complex and time-consuming sample preparation, digestion or extraction, or large instrument size and complex and sophisticated hardware configuration, which cannot be used for on-site and rapid analysis of soil, making it difficult to timely and effectively analyze the soil from the source. Monitoring and Prevention of Heavy Metal Pollution in Soil

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