Fig. 1. Schematic of tank settlement measurement system

Fig. 2. Measurement principle of tank settlement displacement in Y-direction

Fig. 3. Relationship between SNR of different imaging fringes and measurement performance

Fig. 4. Influence of different illumination conditions on measurement

Fig. 5. Influence of different imaging resolution conditions on measurement

Fig. 6. Physical drawing of experiment setup

Fig. 7. Measurement results of decline displacement for linear mobile platform under different illumination conditions

Fig. 8. Experimental measurement results of different intermittent settlement displacements