時(shí)域波形的參數(shù)測(cè)量實(shí)驗(yàn)報(bào)告s4900字

時(shí)域波形的參數(shù)測(cè)量實(shí)驗(yàn)報(bào)告s4900字

時(shí)域測(cè)試技術(shù)綜合實(shí)驗(yàn)報(bào)告書實(shí)驗(yàn)名稱時(shí)域波形的參數(shù)測(cè)量實(shí)驗(yàn)班級(jí)一班學(xué)號(hào)201422070125姓名楊梅實(shí)驗(yàn)時(shí)間：年月日得分：一、實(shí)驗(yàn)?zāi)康?.學(xué)習(xí)VISUALDSP++開發(fā)流程。2.掌握波形時(shí)域參數(shù)（周期、上升時(shí)間等）的測(cè)量方法。3.掌握波形幅度參數(shù)（幅度、平均值、均方根值等）的測(cè)量方法。4.掌握參數(shù)統(tǒng)計(jì)的一般實(shí)現(xiàn)方法。二、實(shí)驗(yàn)內(nèi)容1.學(xué)習(xí)VisualDSP++的開發(fā)設(shè)計(jì)流程。2.編寫程序測(cè)量波形參數(shù)。3.編寫程序?qū)Σㄐ螀?shù)進(jìn)行統(tǒng)計(jì)運(yùn)算。三、實(shí)驗(yàn)步驟1、計(jì)算并顯示示波器幅度參數(shù)：平均值、有效值。打開Ypara.c源文件，填充缺少的代碼。intGetAverage(short*pBuffer,intLength){intSum=0;inti;for(i=0;i<Length;/*inputyourcode*/i++){Sum+=*pBuffer;/*inputyourcode*/pBuffer++;}returnSum/Length;/*inputyourcode*/}floatGetRMS(short*pBuffer,intLength,intZeroValue){floatSum=0;inti;for(i=0;i<Length;i++){longtemp;temp=pBuffer[i]-ZeroValue;/*inputyourcode*/temp*=temp;/*inputyourcode*/Sum+=temp;}Sum/=Length;returnsqrt(Sum)+ZeroValue;/*inputyourcode*/}2、計(jì)算并顯示示波器幅度類參數(shù)：頂值、底值。打開Ypara.c源文件，填充缺少的代碼。intGetTop(short*pBuffer,intLength){shortmidpoint,toppoint,i;midpoint=GetAverage(pBuffer,Length);toppoint=GetMax();i=toppoint;GetCount(*pBuffer,Length);do{i--;if(tmpbuffer[i]>tmpbuffer[toppoint])toppoint=i;}while(i>midpoint);//修正if(tmpbuffer[toppoint]<Length*0.05)toppoint=GetMax();returntoppoint;/*inputyourcode*///return1;}intGetBase(short*pBuffer,intLength){shortmidpoint,basepoint,i;midpoint=GetAverage(pBuffer,Length);basepoint=GetMin();i=basepoint;GetCount(*pBuffer,Length);do{i++;if(tmpbuffer[i]>tmpbuffer[basepoint])basepoint=i;}while(i<midpoint);//修正if(tmpbuffer[basepoint]<Length*0.05)basepoint=GetMin();returnbasepoint;/*inputyourcode*///return1;}3、計(jì)算并顯示示波器時(shí)間類參數(shù)：上升時(shí)間。打開Xpara.c源文件，填充缺少的代碼。intGetRising(short*pBuffer,intLength,intyPer10,intyPer90,int*pxPer10,int*pxPer90){intIndex=0;while(Index<Length&&pBuffer[Index]>yPer10/*inputyourcode*/)Index++;while(Index<Length&&pBuffer[Index]<=yPer10/*inputyourcode*/)Index++;intxPer10=0;if(Index<Length)xPer10=Index;while(Index<Length&&pBuffer[Index]<yPer90/*inputyourcode*/)Index++;intxPer90=0;if(Index<Length)xPer90=Index;*pxPer90=xPer90;*pxPer10=xPer10;return1;}4、新建文件Statistic.c和Statistic.h，并將其加入工程中。在Statistic.c文件中對(duì)平均值和周期兩個(gè)參數(shù)進(jìn)行統(tǒng)計(jì)運(yùn)算，并填寫如下表格。(1)在Statistic.c文件中的參數(shù)統(tǒng)計(jì)算法：intGetAverage(short*pBuffer,intLength){intSum=0;inti;for(i=0;i<Length;/*inputyourcode*/i++){Sum+=*pBuffer;/*inputyourcode*/pBuffer++;}returnSum/Length;/*inputyourcode*/}intGetPeriod(short*pBuffer,intLength,intyPer10,intyPer90,int*pxFirst,int*pxLast){intFirstR10,FirstR90,FirstMid;GetRising(pBuffer,Length,yPer10,yPer90,&FirstR10,&FirstR90);FirstMid=(FirstR10+FirstR90)/2;intFirstF10,FirstF90,SecondMid;GetFalling(pBuffer,Length,yPer10,yPer90,&FirstF10,&FirstF90);SecondMid=(FirstF10+FirstF90)/2;intThird10,Third90,ThirdMid;if(FirstMid>SecondMid){GetFalling(pBuffer+FirstR90,Length-FirstR90,yPer10,yPer90,&Third90);*pxFirst=SecondMid;ThirdMid=(Third10+Third90)/2+FirstR90;}else{GetRising(pBuffer+FirstF10,Length-FirstF10,yPer10,yPer90,&Third90);*pxFirst=FirstMid;ThirdMid=(Third10+Third90)/2+FirstF10;}*pxLast=ThirdMid;return1;/*inputyourcode*/*pxFirst=50;*pxLast=100;return1;}&Third10,&Third10,四、實(shí)驗(yàn)思考題1、如何提高波形測(cè)量的精度？答：主要有兩種方法，其一是減少測(cè)頻量化誤差，即增加測(cè)量時(shí)間（主門時(shí)間）的方法；其二是減小側(cè)周量化誤差，即采用多周期測(cè)量法，在這里不再贅述。此外，為了提高測(cè)量的準(zhǔn)確度，比較常用的方法還有游標(biāo)法、內(nèi)插法、平均測(cè)量技術(shù)、多周期同步測(cè)量法、相檢寬帶測(cè)頻技術(shù)以及量化時(shí)沿法。2、完善波形周期、幅度值的測(cè)量算法。答：intGetPeriod(short*pBuffer,intLength,intyPer10,intyPer90,int*pxFirst,int*pxLast){intFirstR10,FirstR90,FirstMid;GetRising(pBuffer,Length,yPer10,yPer90,&FirstR10,&FirstR90);FirstMid=(FirstR10+FirstR90)/2;intFirstF10,FirstF90,SecondMid;GetFalling(pBuffer,Length,yPer10,yPer90,&FirstF10,&FirstF90);SecondMid=(FirstF10+FirstF90)/2;intThird10,Third90,ThirdMid;if(FirstMid>SecondMid){GetFalling(pBuffer+FirstR90,Length-FirstR90,yPer10,yPer90,&Third10,&Third90);*pxFirst=SecondMid;ThirdMid=(Third10+Third90)/2+FirstR90;}else{GetRising(pBuffer+FirstF10,Length-FirstF10,yPer10,yPer90,&Third10,&Third90);*pxFirst=FirstMid;ThirdMid=(Third10+Third90)/2+FirstF10;}*pxLast=ThirdMid;return1;/*inputyourcode*/*pxFirst=50;*pxLast=100;return1;}intGetAmplitude(short*pBuffer,intLength){returnGetTop(pBuffer,Length)-GetBase(pBuffer,Length);}五、實(shí)驗(yàn)結(jié)果分析與總結(jié)（1）系統(tǒng)的噪聲水平、和被測(cè)信號(hào)的信噪比對(duì)波形參數(shù)測(cè)量的精度有直接的影響，通過參數(shù)統(tǒng)計(jì)功能可以減小噪聲對(duì)參數(shù)測(cè)量的影響。（2）脈沖波形的頂值、低值非常重要，幅度、上升時(shí)間、脈寬等其他波形參數(shù)的都依賴于頂值和低值。（3）對(duì)正弦波、三角波而言，其頂值、低值就是最大和最小值?！咀⒁猓好看瓮瓿蓪?shí)驗(yàn)后，按上面的格式手寫并上交實(shí)驗(yàn)報(bào)告。】

第二篇：4螺紋參數(shù)測(cè)量實(shí)驗(yàn)報(bào)告600字實(shí)驗(yàn)三、用萬(wàn)能工具顯微鏡測(cè)量螺紋主要參數(shù)一、實(shí)驗(yàn)?zāi)康?、了解萬(wàn)能工具顯微鏡的測(cè)量原理及結(jié)構(gòu)特點(diǎn)。2、掌握用萬(wàn)能工具顯微鏡測(cè)量外螺紋中徑，螺距和牙型半角的方法。二、實(shí)驗(yàn)設(shè)備：萬(wàn)能工具顯微鏡測(cè)角目鏡，頂尖，曲軸三、測(cè)量原理影像法測(cè)量外螺紋中徑，牙型半角和螺距。四、實(shí)驗(yàn)步驟1、利用調(diào)焦桿進(jìn)行調(diào)焦；2、擦凈儀器被測(cè)螺紋，將工件小心地安裝在兩頂尖之間，擰緊頂尖的固緊螺釘4、根據(jù)被測(cè)螺紋的尺寸，調(diào)節(jié)光瀾。5、調(diào)節(jié)立柱傾斜一個(gè)個(gè)螺旋升角角度6、測(cè)量螺紋主要參數(shù)：（1）測(cè)量中徑d2左=d2右=取兩者的平均值作為實(shí)際中徑：d2實(shí)際?圖1圖2（2）測(cè)量牙型半角?2