Page 84 - 摩擦学学报2025年第8期

1182 摩擦学学报（中英文） 第 45 卷

4.0
Noisy signal 4.5 Noisy signal
3.5 Denoised signal Denoised signal
4.0
3.0 3.5
Loss of Loss of
2.5 cross-sectional
B/mT 2.0 area 1% B/mT 3.0 cross-sectional
2.5
area 2.2%
2.0
1.5
1.5
1.0 1.0
0.5 0.5
0 100 200 300 400 500 0 100 200 300 400 500
Signal number Signal number
(a) Single worn wire (b) Distance between short broken wires

5.0 8
Noisy signal Noisy signal
4.5 Denoised signal 7 Denoised signal
4.0 6
Loss of
3.5 cross-sectional 5 Loss of
B/mT 3.0 area 3.2% 4 B/mT cross-sectional
area 4.1%
2.5
2.0 3
1.5 2
1.0 1
0.5
0 100 200 300 400 500 0 100 200 300 400 500
Signal number Signal number
(c) Distance between long broken wires (d) Distance between long broken wires

8 10
Noisy signal 9 Noisy signal
7 Denoised signal Denoised signal
8
6
7 Loss of
Loss of
B/mT 5 4 cross-sectional B/mT 6 5 cross-sectional
area 6.1%
area 5.1%
3 4
3
2 2
1 1
0 100 200 300 400 500 0 100 200 300 400 500
Signal number Signal number
(e) Single strand break concentrated (f) Single strand breakage and single strand wear

10 Noisy signal 12
9 Denoised signal 11 Noisy signal
Denoised signal
8 10 9
7 8
Loss of
6 cross-sectional 7 Loss of
5 B/mT area 7.0% B/mT 6 cross-sectional
area 7.9%
4 5
3 4 3
2 2
1 1
0 100 200 300 400 500 0 100 200 300 400 500
Signal number Signal number
(g) Double broken strands concentrated (h) Single strand breakage and single strand grinding pit
Fig. 8 Noise reduction effect of discrete wavelet packet with different damages
图 8 不同损伤离散小波包降噪效果