小型施肥机施肥检测系统设计与试验

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中图分类号：S224.2 文献标识码：A 文章编号：2095-5553（2025）07-0206-05

Abstract：Toaddresstheissueofonlinefertilizationmeasurementinsmallfertilizationmachines，adetectionsystembased onacapacitive sensor was designed.This systemis centered around the STM32Fl03C8T6 microcontroler and comprises a capacitive plate，an FDC2214 capacitive sensor chip，andother hardware circuits. Itcaptures the changeincapacitancebetweenparalelplatescausedbythefallingoffertilizer，convertingthecapacitivesignalintoadigital oneforprocessingand storageby the microcontroler.Themeasured capacitance values，correlated withthe mass of the fertilizer，aredisplayed onan OLED screen，and datacanbetransferred toacomputer viaserialcommunication.Atesting platformforthefertilizerdistributionsystemofanexternal troughwhel-typefertilizeraplicatorwasconstructed， establishingamathematical modelrelating the massflowrateofcompound fertilizertochanges incapacitance.This model was experimentallyvalidated undervarious working conditions.Theresults demonstratedalinearcorrelationcoeficientof 0.989 between thechangeincapacitanceandthemassoffertilizer between theplates，indicatingasignificantfit.Although temperature variations could increase the error margin of the detection system，the overallrelative measurement error for fertilization quantity did not exceed 8.07% ，meeting both design and practical production requirements.

Keywords：ailfertilsseot；apiaceas；rotlss；fer

0 引言

施肥是进行农业作业过程中的重要环节，对农作物的生长培育起到至关重要的作用。（剩余8832字）