Research on Base Station Layout of Multi-Station and Time-Sharing Measurement by Laser Tracker

Wang Jindong; Sun Rongkang; Zeng Xiaotao; Wang Qingjie

doi:10.3788/CJL201845.0404005

Chinese Journal of Lasers, Volume. 45, Issue 4, 404005(2018)

Research on Base Station Layout of Multi-Station and Time-Sharing Measurement by Laser Tracker

Wang Jindong^*, Sun Rongkang, Zeng Xiaotao, and Wang Qingjie

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[in Chinese]

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Figures & Tables(15)

Fig. 1. Precision detection principle of machine tool by multi-station and tine-sharing measurement by a laser tracker

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Fig. 2. Distribution of base stations and measuring points

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Fig. 3. Direction vectors between a measuring point and different base stations

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Fig. 4. PDOP variation curve of base station P1 which moves 3500 mm along the positive and negative directions of x-axis

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Fig. 5. PDOP variation curve of base station P1which moves 3500 mm along the positive and negative directions of z-axis

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Fig. 6. PDOP variation curve of base station P1 which moves 900 mm along the positive and negative directions of x-axis

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Fig. 7. 3D distribution of PDOP at different positions with 2D measuring area

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Fig. 8. 3D distribution of PDOP at different positions in 3D measuring area

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Fig. 9. PDOP distribution on different sections inside the moving area of machine tool. (a) z=800 mm; (b) z=100 mm

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Fig. 10. Distribution of base stations

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Table 1. Average calibration deviations of different base stationsμm
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Table 1. Average calibration deviations of different base stationsμm
Base station Δx Δy Δz M
P₁ -2.1 -1.2 -1.2 2.7
P₂ 1.7 2.8 -2.9 4.4
P₃ -3.9 -3.0 3.8 5.8
P₄ 4.6 2.8 3.6 6.5

Table 2. Overall calibration deviations and PDOP values of different base stations
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Table 2. Overall calibration deviations and PDOP values of different base stations
Base station M /μm PDOP
P₁ 2.7 0.405
P₂ 4.4 0.501
P₃ 5.8 0.654
P₄ 6.5 0.755

Table 3. PDOP values of different base stations at 1D measuring area
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Table 3. PDOP values of different base stations at 1D measuring area
Base station P₁ P₂ P₃ P₄
PDOP 3.7×10⁷ 4.9×10⁷ 8.3×10⁸ ¥

Table 4. Overall calibration deviations and their PDOP values at different base stations
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Table 4. Overall calibration deviations and their PDOP values at different base stations
Base station M /mm PDOP
P₁ 2.3 0.401
P₂ 2.5 0.401
P₃ 4.2 0.462
P₄ 5.2 0.586

Table 5. PDOP values of base station P1 at different measuring areas
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Table 5. PDOP values of base station P1 at different measuring areas
Item PDOP
Number ofmeasurement points 20 32 44 56
3D space 0.732 0.571 0.494 0.432
Measuringarea 2D plane 1.054 0.833 0.712 0.635
1D line 2.8×10⁸ 1.1×10⁸ 7.7×10⁷ 5.8×10⁷

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Wang Jindong, Sun Rongkang, Zeng Xiaotao, Wang Qingjie. Research on Base Station Layout of Multi-Station and Time-Sharing Measurement by Laser Tracker[J]. Chinese Journal of Lasers, 2018, 45(4): 404005

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