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Measurement results at different distances.
| Measuring distance (m) | Measured average value (mm) (average value of manual measurement = 199.8 mm) | Correlation coefficient r between sensor and manual measurement results | Mean absolute error (mm) | Mean value of relative error (%) |
|---|---|---|---|---|
| 0.5 | 198.9 | 0.987 | 2.7 | 1.34 |
| 0.7 | 196.7 | 0.949 | 5.9 | 2.89 |
| 0.9 | 189.5 | 0.982 | 10.3 | 5.25 |
| 1.0 | 183.8 | 0.977 | 16.0 | 8.35 |
