Table 3 The relative error value of the vertical displacement of the sensors in test A and test C.
Sensor ID | Vertical displacement | Vertical displacement (PIV) | Relative error | Mean relative error | ||||
|---|---|---|---|---|---|---|---|---|
MEMS spherical monitoring device /mm | MEMS sensor /mm | MEMS spherical monitoring device /mm | MEMS sensor /mm | MEMS spherical monitoring device /% | MEMS sensor /% | MEMS spherical monitoring device /% | MEMS sensor /% | |
1 | 5.9 | 7.2 | 6.7 | 6.3 | – 11.94 | 14.28 | 6.76 | 8.79 |
2 | 5.6 | 6.9 | 5.2 | 6.3 | 7.69 | 9.52 | ||
3 | 5.0 | 5.2 | 5.3 | 5.7 | – 5.66 | – 8.77 | ||
4 | 5.5 | 5.9 | 5.2 | 5.5 | 5.77 | 7.27 | ||
5 | 4.4 | 4.4 | 4.6 | 4.7 | – 4.35 | – 6.38 | ||
6 | 4.1 | 4.3 | 3.9 | 4.6 | 5.13 | 6.52 | ||
