正常磁力计数据:

Magnetometer WhoAmI:0x4809 is OK
Magn: 33.744504, -1.049829, 39.593552
x:0.369177, y:-0.929359
y/x=-68.3351
heading:291.664877, ??? -1.781961

Magn: 32.844651, -1.649731, 37.943820
x:0.355230, y:-0.934779
y/x=-69.1924
heading:290.807571, ??? -2.875454

Magn: 32.844651, -1.199805, 39.143625
x:0.351194, y:-0.936303
y/x=-69.4397
heading:290.560338, ??? -2.092066

Magn: 34.494382, 1.049829, 38.843674
x:0.366076, y:-0.930585
y/x=-68.5262
heading:291.473843, ??? 1.743246

Magn: 32.544700, -0.449927, 40.493405
x:0.338166, y:-0.941087
y/x=-70.2348
heading:289.765151, ??? -0.792057

Magn: 31.344895, -0.149976, 39.743527
x:0.309449, y:-0.950916
y/x=-71.974
heading:288.026039, ??? -0.274140

Magn: 33.894480, -0.149976, 39.743527
x:0.364242, y:-0.931304
y/x=-68.6391
heading:291.360936, ??? -0.253519

Magn: 32.844651, 0.149976, 39.443576
x:0.339533, y:-0.940594
y/x=-70.1516
heading:289.848437, ??? 0.261623

Magn: 34.644358, -1.199805, 40.943332
x:0.389467, y:-0.921040
y/x=-67.0787
heading:292.921328, ??? -1.983477

Magn: 32.994626, 0.000000, 38.843674
x:0.343990, y:-0.938973
y/x=-69.8798
heading:290.120175, ??? 0.000000

Magn: 34.494382, -0.749878, 41.393258
x:0.382145, y:-0.924103
y/x=-67.5334
heading:292.466592, ??? -1.245364

Magn: 33.444553, -1.049829, 39.593552
x:0.362788, y:-0.931872
y/x=-68.7285
heading:291.271505, ??? -1.797932

Magn: 34.944309, -0.299951, 40.043478
x:0.387230, y:-0.921983
y/x=-67.2178
heading:292.782222, ??? -0.491797

Magn: 33.744504, -0.299951, 40.643381
x:0.362433, y:-0.932010
y/x=-68.7503
heading:291.249665, ??? -0.509282

Magn: 32.994626, -0.299951, 40.343429
x:0.346556, y:-0.938029
y/x=-69.7232
heading:290.276826, ??? -0.520856

Magn: 32.694675, -1.049829, 39.593552
x:0.346605, y:-0.938011
y/x=-69.7202
heading:290.279778, ??? -1.839141

Magn: 32.844651, -1.949682, 39.743527
x:0.357965, y:-0.933735
y/x=-69.0247
heading:290.975280, ??? -3.397133

Magn: 32.994626, 0.299951, 39.293600
x:0.341456, y:-0.939898
y/x=-70.0344
heading:289.965617, ??? 0.520856

Magn: 34.344406, 0.149976, 39.143625
x:0.370893, y:-0.928675
y/x=-68.2293
heading:291.770719, ??? 0.250198

Magn: 32.244748, -0.749878, 39.593552
x:0.334186, y:-0.942507
y/x=-70.4769
heading:289.523059, ??? -1.332220

Magn: 34.944309, -1.499756, 41.393258
x:0.398554, y:-0.917145
y/x=-66.5122
heading:293.487808, ??? -2.457538

Magn: 34.194431, -0.299951, 40.343429
x:0.371820, y:-0.928305
y/x=-68.1721
heading:291.827887, ??? -0.502582

Magn: 32.844651, -0.149976, 39.443576
x:0.342068, y:-0.939675
y/x=-69.9971
heading:290.002898, ??? -0.261623

Magn: 32.994626, -0.749878, 40.043478
x:0.350466, y:-0.936575
y/x=-69.4842
heading:290.515814, ??? -1.301953

Magn: 34.494382, -0.749878, 40.043478
x:0.382145, y:-0.924103
y/x=-67.5334
heading:292.466592, ??? -1.245364

Magn: 33.894480, -0.449927, 39.743527
x:0.366913, y:-0.930255
y/x=-68.4747
heading:291.525347, ??? -0.760519

Magn: 32.244748, -0.749878, 41.393258
x:0.334186, y:-0.942507
y/x=-70.4769
heading:289.523059, ??? -1.332220

Magn: 34.344406, -0.449927, 40.493405
x:0.376286, y:-0.926504
y/x=-67.8962
heading:292.103791, ??? -0.750557

手机放到FVIT盖板后数据:

Magn: 86.535906, -49.491939, 120.580361
x:0.984110, y:0.177560
y/x=10.2276
heading:10.227642, ??? -29.766264

Magn: 86.985833, -50.241817, 122.080117
x:0.982376, y:0.186915
y/x=10.7728
heading:10.772810, ??? -30.010138

Magn: 87.735711, -48.292135, 119.980459
x:0.987311, y:0.158797
y/x=9.13705
heading:9.137052, ??? -28.829589

Magn: 86.685882, -50.841720, 120.430386
x:0.980655, y:0.195744
y/x=11.2882
heading:11.288176, ??? -30.391844

Magn: 88.335613, -50.541768, 121.030288
x:0.982147, y:0.188113
y/x=10.8427
heading:10.842653, ??? -29.776299

Magn: 88.935515, -48.592086, 121.930142
x:0.986988, y:0.160793
y/x=9.25296
heading:9.252956, ??? -28.651061

Magn: 86.985833, -48.742062, 121.330239
x:0.986069, y:0.166336
y/x=9.57483
heading:9.574832, ??? -29.263865

Magn: 87.435760, -50.391793, 120.880313
x:0.982170, y:0.187996
y/x=10.8359
heading:10.835878, ??? -29.956109

Magn: 87.735711, -49.491939, 121.330239
x:0.984536, y:0.175180
y/x=10.0891
heading:10.089127, ??? -29.427456

Magn: 88.335613, -49.042013, 121.330239
x:0.985797, y:0.167941
y/x=9.66814
heading:9.668136, ??? -29.038083

Magn: 86.535906, -49.491939, 120.580361
x:0.984110, y:0.177560
y/x=10.2276
heading:10.227642, ??? -29.766264

Magn: 88.335613, -49.042013, 121.330239
x:0.985797, y:0.167941
y/x=9.66814
heading:9.668136, ??? -29.038083

Magn: 87.735711, -49.791891, 120.280410
x:0.983803, y:0.179251
y/x=10.3261
heading:10.326124, ??? -29.575837

Magn: 85.786028, -50.241817, 121.030288
x:0.981879, y:0.189507
y/x=10.924
heading:10.924033, ??? -30.355985

Magn: 86.685882, -48.142159, 120.880313
x:0.987350, y:0.158558
y/x=9.12322
heading:9.123218, ??? -29.046187

Magn: 87.285784, -50.241817, 121.330239
x:0.982497, y:0.186280
y/x=10.7358
heading:10.735787, ??? -29.924790

Magn: 87.285784, -49.042013, 122.080117
x:0.985461, y:0.169902
y/x=9.7821
heading:9.782101, ??? -29.329702

Magn: 86.685882, -49.641915, 122.979971
x:0.983790, y:0.179323
y/x=10.3303
heading:10.330307, ??? -29.798229

Magn: 88.335613, -48.742062, 120.580361
x:0.986481, y:0.163877
y/x=9.43202
heading:9.432015, ??? -28.889153

Magn: 87.285784, -49.491939, 121.330239
x:0.984379, y:0.176063
y/x=10.1405
heading:10.140531, ??? -29.553684

Magn: 88.635564, -50.091842, 120.880313
x:0.983394, y:0.181483
y/x=10.4562
heading:10.456172, ??? -29.472694

Magn: 87.735711, -48.292135, 120.280410
x:0.987311, y:0.158797
y/x=9.13705
heading:9.137052, ??? -28.829589

Magn: 89.835369, -50.241817, 122.080117
x:0.983467, y:0.181086
y/x=10.433
heading:10.433044, ??? -29.216777

Magn: 87.735711, -50.541768, 122.380068
x:0.981903, y:0.189382
y/x=10.9167
heading:10.916749, ??? -29.944884

Magn: 87.885686, -50.841720, 121.180264
x:0.981181, y:0.193089
y/x=11.1331
heading:11.133132, ??? -30.049308

Magn: 87.885686, -48.892037, 122.230093
x:0.986002, y:0.166732
y/x=9.59785
heading:9.597852, ??? -29.087800

Magn: 87.735711, -49.791891, 121.780166
x:0.983803, y:0.179251
y/x=10.3261
heading:10.326124, ??? -29.575837

Magn: 86.985833, -49.491939, 121.330239
x:0.984272, y:0.176658
y/x=10.1752
heading:10.175157, ??? -29.638384

Magn: 87.735711, -49.042013, 121.780166
x:0.985607, y:0.169055
y/x=9.73285
heading:9.732855, ??? -29.204071

Magn: 88.335613, -49.042013, 121.030288
x:0.985797, y:0.167941
y/x=9.66814
heading:9.668136, ??? -29.038083

比较:

Magn: 32.844651, 0.149976, 39.443576

Magn: 88.335613, -49.042013, 121.030288