基于STM32的交流电压检测-任宏斌

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ElectronicDesignEngineering24Vol.2413No.1320167Jul.2016,。,,,。,、、。,、、[1],,STM32。STCortex-M3MCU,,。STM32A/D,TFT,、,,,。、、、,,[2]。11.1STM32。,ADC。,,STM32。,STM32,FFT,,,。1。1.2,,[3]:U=(1/T)T0乙u2(t)dt姨(1)T。U2=(1/T)T0乙u2(t)dtF=U2T,f(t)=u2(t),F=T0乙f(t)dt(3)U(t)f(t)STM32,(300384):,,STM32、。,STM32ADC。、,、。:STM32;;;CD4046:TN98:A1674-6236(2016)13-0133-03ACvoltagedetectionbasedonSTM32RENHong-bin,LENGJian-wei(TianjinUniversityofTechnology,Tianjin300384,China)Abstract:Voltagesignalacquisitionisthecommonfunctionmoduleintheelectronicsystem.Inthispaper,alowpowerconsumptionandhighperformanceACvoltageacquisitionsystemisdesignedbasedonSTM32.Thesystemusestheoperationalamplifiertofollowthesignal,anduseLF398tosamplethesignal,andusetheADCSTM32toconvertthesignaltoanalogsignal.Thepracticalresultsshowthattheequipmentissimpleandthetechnicalspecificationsmeetthenationalstandardsperfectly,andithasgoodvalueofapplicationandpromotion.Keywords:STM32;ACvoltage;phasesampling;CD4046:2015-06-30:201506258:(1991—),,,。:。1(2)-133-DOI:10.14022/j.cnki.dzsjgc.2016.13.042,,,:F=(h/3)[f0+4(f1+f3+…+f63)+2(f2+f4+…+f62)+f64]+EN(4)EN=(nh5/90)f(4)(ζ)0<ζ<T(5),h=T/(2n);n=N/2,N。,,,,,:u(t)=U1cosωt+U3cos3ωt(6),U1=U3=U,fmax(4)=928U2ω4,MCUA/D0~3.3V,U=3.3V,EN=2.3×10-5V。,64,23μV,ADC0.8mV,,。22.1。ZMPT101B。R’,R1。ADC,R’250kΩ,R1330Ω,1.5V。,C1LM324,,±1.5V。STM32ADC0~3.3V,INA128,1.5V,RC,ADC。2。2.2A/DSTM32,1~3ADC,ADC,()。ADC,、、、[4]。STM32ADC12;1μs。,VREF-=0V,STM32ADC2,:VREF-≦VIN≦VREF+。,,。ADCA/D。2.3,,TL082,3。0V,,0V,。MCU,,。2.4,,。,,。,,。CD4046CD451864[5],64,STM32,A\D,[6]。4。3STM32,,,,STM32,,。ADC,CPU,STM32DMA(DirectMemoryAccess)。DMA,CPU。DMACPU,DMA,CPU,DMA3《》201613-134-,,。:4KeilSTM32,J-Link,。C#,STM32,。6,,,listview。5ARMSTM32,Cortex-M3,,A/D、,,。,,STM32,FFT,。STM32。:[1].STM32[J].,2010(3):137-139.[2].STM32[J].,2010(11):90-93.[3].PIC[J].:,2008(36):705-706.[4].STM32[M].:,2013:112-138.[5].[J].,2008(4):153-154.[6],,,.DSP[J].,2012(5):32-36.456,STM32-135-

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