实验18霍尔效应数据处理
霍尔效应数据处理范例
由公式:
,NI,VM0, ; ,,BKHL,,,,2,L1,r
L2VL,()H1,r得 K,HI,I,,,MCH0
,7,1——真空磁导率(=);N——励磁线圈的匝数(N=1500);,,4,,10,T,m,A00
I——线圈中的励磁电流; M
L——气隙距离; L——铁芯磁路平均长度;,——铁芯相对磁导率(,=1500) 12rr
例1、用逐差法处理数据:
数据
记录
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及处理
I=200mA, L=3.00mm; L=287mm; M12
0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00
V-0.66 -1.44 -2.24 -3.02 -3.82 -4.60 -5.40 -6.16 -6.96 -7.73 -8.55 -9.33 -10.12 -10.92 H1
V0.97 1.75 2.54 3.33 4.11 4.89 5.69 6.44 7.23 8.00 8.81 9.57 10.37 11.17 H2
V0.97 1.74 2.53 3.33 4.12 4.88 5.68 6.44 7.23 7.99 8.80 9.56 10.36 11.13 H3
V-0.67 -1.45 -2.23 -3.04 -3.82 -4.60 -5.40 -6.17 -6.98 -7.75 -8.56 -9.33 -10.15 -10.95 H4
V0.82 1.60 2.39 3.18 3.97 4.74 5.54 6.30 7.10 7.87 8.68 9.45 10.25 11.04 H
V,V,6.30,0.82,5.48 V,V,7.10,1.60,5.50 V,V,7.87,2.39,5.48 8192103
V,V,868,3.18,5.50 V,V,9.45,3.97,5.48 V,V,10.25,4.74,5.51 114125136
V,V,11.04,5.54,5.50 147
7 n,7 根据肖维涅准则剔除坏值 C,1.8(坏值条件:|X,X|>C*S 数据个数N,7inX
X的平均值()为5.49 S,0.012536 C*S,0.022564 无坏值出现,VXnXH
I,3.50mACH
72(,)xx,ii,1某次测量的
标准
excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载
偏差: ,,0.01253SX7,1
72(,)xx,ii,1平均值的标准偏差: ,,0.004738Sx7(7,1)
不确定度估算:
,m0.05U,,0.0047 ; U,,,0.029SABx33
2222 U,U,U,(0.0047),(0.0029),0.029VAB
U0.029X E,,,0.0053V5.49V,H
,0.05m ,,,0.029U,33
U0.029I E,,,0.008I,I3.50计算霍尔灵敏度及其不确定度: KH
L2287VL(,)5.49(3.00,)H1,r1500 mv/(mA,T)K,, ,13.29H,7II,,,,,200,3.50,4,10,1500MCH0
2222 ,,E,E,(0.008),(0.0053),0.0096,1.0%KIV。 U,,,,,13.28,1.0%,0.13,0.2mv/(mA,T),K,处理结果:
,=(13.30.2) (P=0.683) mv/(mA,T)KH
E=1.0%
例2、作图法: I=1.00mA, L=4.00mm , L=269mm CH12
V\I100 200 300 400 500 600 700 800 HM
V-0.64 -1.42 -2.26 -3.05 -3.84 -4.62 -5.30 -6.04 H1
V0.94 1.74 2.55 3.34 4.13 4.90 5.66 6.36 H2
V0.95 1.73 2.56 3.34 4.14 4.92 5.68 6.38 H3
V-0.63 -1.44 -2.25 -3.04 -3.83 -4.58 -5.28 -6.04 H4
V0.79 1.58 2.41 3.20 3.99 4.76 5.48 6.21 H
描绘霍尔电压与励磁电流关系图:
计算结果极其不确定度:
在图上取两点A(200,1.55) B(700,5.47)
ΔIm =Im,Im,700,200,500(mA) ABΔV,V,V,5.47-1.55,3.92(mV) HHBHA
2,2,5m (取横坐标最小刻度值的一半) ,,,4.1,mU,33
U4.1I E,,,0.0082I,I500
2,m2,0.01 (取纵坐标最小刻度值的一半) U,,,0.008,mV33U0.008V E,,,0.0021V,V3.92
L22.69VL(,)3.92(4.00,)H1,r1500 mv/(mA,T)K,, ,17.38H,7II,,,,,500,1.00,4,10,1500MCH0
2222 ,,E,E,(0.0082),(0.0021),0.0085,0.9%KIV
U,,,,,17.38,0.9%,0.16,0.2mv/(mA,T),K,
处理结果:
=(17.40.2) (P=0.683) ,mv/(mA,T)KH
E=0.9%
附:
L2,L1,r 为了计算方便,可以一个常数 , K,,0
VH 于是 , KKH,IIMCH
,7,1,1又:==0.001885 =0.001885 ,,4,,10,1500,T,m,A,T,mm,mA0
所以:
旧仪器: L=3.00mm , L=287mm 12
287mm(3.00,)3.1911500 K() ,,,1693mA/T,10.001885TmmmA0.001885,,
新仪器:L=4.00mm , L=269mm 12
2694.00,4.1791500()K,,,2217mA/T 0.0018850.001885