Water quality element concentration detection method based on unmanned aerial vehicle spectrum

A concentration detection, drone technology

Inactive Publication Date: 2019-03-22
ZHEJIANG FORESTRY UNIVERSITY
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Problems solved by technology

However, what water quality inversion requires is the spectral reflectance obtained by the water surface being irradiated by sunlight, which requires more spectral band information, which cannot be satisfied by general sensors, and requires a special multi-spe

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  • Water quality element concentration detection method based on unmanned aerial vehicle spectrum
  • Water quality element concentration detection method based on unmanned aerial vehicle spectrum
  • Water quality element concentration detection method based on unmanned aerial vehicle spectrum

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Example Embodiment

[0034] Example 1:

[0035] A method for detecting the concentration of water quality elements based on UAV spectrum in this embodiment, refer to figure 1 and figure 2 , including the following steps: determine the target area, determine the target elements corresponding to the water samples in the target area, distribute the sampling points in the target area, and set the location coordinates of the sampling points; use a drone equipped with a multispectral camera to conduct the sampling points over the target area. Shoot to obtain an image corresponding to the sampling point; perform software analysis on the image corresponding to the sampling point to obtain spectral characteristic data, and use the spectral characteristic data to calculate a set of spectral parameters corresponding to the sampling point Vi (i= 1, 2, 3...n), n is a positive integer; the spectral parameters with the highest correlation with each target element in water quality are obtained through correlati...

Example Embodiment

[0037] Embodiment 2:

[0038]A method for detecting the concentration of water quality elements based on UAV spectrum in this embodiment, based on the first embodiment, determining the target element corresponding to the water sample in the target area includes the following steps: collecting the water sample at the sampling point, and performing detection and analysis to obtain a Water quality elements that evaluate water quality and are strongly correlated with characteristic data. The content of several elements that can evaluate water quality and are strongly correlated with spectral reflectance, including three elements of total phosphorus (tp), turbidity (tbd), and suspended solids (ssd) concentration, the target area corresponding to the water sample Factors include total phosphorus, suspended solids, and turbidity.

Example Embodiment

[0039] Embodiment three:

[0040] In this embodiment, a method for detecting the concentration of water quality elements based on the spectrum of an unmanned aerial vehicle, based on the second embodiment, adopts an unmanned aerial vehicle equipped with a multi-spectral camera to shoot a sampling point over a target area, and obtain an image corresponding to the sampling point. : The multispectral camera has 5 spectral bands, namely: Blue (0.450μm-0.515μm), Green (0.525μm-0.605μm), Red (0.630μm-0.690μm), Red edge position (0.670μm-0.760μm) , NIR (0.770μm-0.890μm); input the image data corresponding to the sampling point into the image data correction conversion model, perform geometric correction on the image data, simulate the model of reference satellite image correction processing, and perform geometric correction processing on the image data , mainly to solve the problem of specular reflection on the water surface, because compared with satellites, the flying height of UAV...

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Abstract

The invention discloses a water quality element concentration detection method based on an unmanned aerial vehicle spectrum, and belongs to the technical field of water quality monitoring. The methodcomprises the steps that a target area is determined, target elements are determined, and sampling points are distributed in the target area; a multi-spectral camera is carried by adopting an unmannedaerial vehicle, and the sampling points are photographed in the sky above the target area so as to obtain corresponding images; the corresponding images are subjected to software analysis so as to obtain spectral characteristic data, and the corresponding spectral parameters at the sampling points are acquired through data calculation; the spectral parameters with the highest correlation with allthe target elements in the water quality are acquired through correlation analysis; an inversion model of each target element in the water quality is determined; and the spectral parameters with thehighest correlation with the target elements are input into the target element inversion models, and the output values are the concentration contents of the corresponding target elements. According tothe method, unmanned aerial vehicle remote sensing and water quality monitoring are combined, equipment involved in the whole inversion process of the water quality elements comprises the unmanned aerial vehicle and the spectral camera, and therefore the detection process is simpler and more convenient, the operation is simple, and the accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of water quality monitoring, and in particular relates to a method for detecting the concentration of water quality elements based on the spectrum of an unmanned aerial vehicle. Background technique [0002] At present, affected by human activities, the pollution of water resources is becoming more and more serious, and nearly half of the water resources are seriously polluted. The prevention and control of water pollution in the current urban environment is the top priority of ecological environment governance. In the past few decades, due to the guarantee of basic living needs and the excessive pursuit of economic development speed, the overall ecological environment of our country has been damaged. damage, especially the overall water environment has been continuously deteriorated. At present, my country's water quality monitoring mainly relies on manual monitoring. Manual monitoring is carried out throu...

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Application Information

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IPC IPC(8): G01N21/25
CPCG01N21/25
Inventor 冯海林刘彦君夏凯方益明杜晓晨杨垠晖周国模
Owner ZHEJIANG FORESTRY UNIVERSITY
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