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Design Of Soil Salt Detection System Based On Dielectric Constant And Conductivity

Posted on:2024-02-06Degree:MasterType:Thesis
Country:ChinaCandidate:X K ZhangFull Text:PDF
GTID:2530307124460404Subject:Engineering
Abstract/Summary:PDF Full Text Request
Soil resources are the foundation of human survival,and soil salinization is an important issue facing the improvement of soil resources and arable land quality.The detection and management of saline alkali soil resources cannot do without accurate and stable soil salt detection instruments or systems.Realizing the rational application of soil resources,improving the yield of more agricultural products and the soil quality of saline alkali soil,so that more saline alkali soil can meet people’s production needs and serve humanity.This thesis designs a soil conductivity detection system scheme that combines soil dielectric constant measurement data.By using a dielectric constant sensor,the influence of moisture on salt content measurement in the soil conductivity model is effectively solved.Through experimental analysis and calibration,a linear fitting function between conductivity and salinity was obtained under different water contents.This function reflects the good linear correlation between soil salinity content,soil dielectric constant,and conductivity under certain conditions.Through a large number of experiments,it has been found that the soil moisture conductivity salt content model based on dielectric constant can be used to determine the salt content in saline alkali soil by examining the specific correspondence between different moisture contents and soil conductivity.Further,by designing and producing a soil salt detection system based on the STM32F407ZGT6 main core controller,comprehensive soil data is collected through multiple sensors.After data processing,the data is uploaded to the Alibaba Cloud Internet of Things cloud platform through 4G Internet of Things communication.The soil salt alkali land data information can be viewed through self-defined object model data,achieving remote and in-situ data collection,as well as data presentation through mobile apps.The soil moisture conductivity salt content model based on dielectric constant studied in this thesis,as well as the soil salt detection system based on this model,have good stability and detection accuracy.When the water content of soil saline-alkali soil is in the range of 1.0wt.%-15 wt.%,the detection range of salt content can reach0.1wt.%-2.0wt.%,and it has real-time and rapid detection function,This provides an effective and feasible scientific basis for subsequent soil salinization and soil improvement,and has certain practical value and reference significance.
Keywords/Search Tags:dielectric constant, Soil conductivity, Soil moisture, Soil salinity, Cloud platform, 4G Internet of Things communication
PDF Full Text Request
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