Figure 2 | Scientific Reports

Figure 2

From: Monitoring and early warning method for a rockfall along railways based on vibration signal characteristics

Figure 2

Vibration curve and frequency chart for the two horizontal sensors at point D on the protective net. (Directions x and y are horizontal and perpendicular to each other. The upper two figures show results for the 1000-kJ drop with the net breaking, the middle two figures show results for the 3000-kJ drop without breaking the net, and the lower two figures show results for the 5000-kJ drop without breaking the net).

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