A Set-Up of 7 Laser Triangulation Sensors and a Draw-Wire Sensor for Measuring Relative Displacement of a Piston Rod Mechanical Lead-Through Transmission in an Offshore Wave Energy Converter on the Ocean Floor
Table 3
Compiled statistical data from system calibration and curve fitting for laser sensors.
Statistics for laser sensors
PRLS 1
PRLS 2
PRLS 3
SHLS 1
SHLS 2
SHLS 3
SHLS 4
Standard error of the voltage means in each calibration point during system calibration:
[V]
2.06E−5
1.45E−5
9.01E−6
2.40E−5
9.21E−7
6.12E−6
3.69E−5
[V]
9.21E−7
2.68E−6
4.03E−5
9.35E−6
5.16E−6
2.36E−5
2.40E−5
[V]
3.78E−5
1.19E−5
5.16E−6
1.13E−6
9.15E−6
1.83E−5
2.16E−6
[V]
6.68E−5
4.89E−5
5.95E−5
2.79E−5
3.41E−5
1.95E−6
2.14E−5
Pooled standard error of the mean voltages from system calibration of each sensor:
[V]
3.98E−5
2.62E−5
3.63E−5
1.90E−5
1.78E−5
1.53E−5
2.45E−5
Standard error for the voltage residuals from curve fitting of the transfer functions:
RMSE [V]
0.009400
0.010442
0.015120
0.000644
0.001855
0.004721
0.004169
Coefficients of determination from curve fitting of the transfer functions:
0.999998
0.999998
0.999998
1.000000
1.000000
1.000000
1.000000
95% confidence bounds for slope and offset coefficients in the transfer functions:
Slope bounds
±0.0065
±0.0055
±0.006
±0.0005
±0.0005
±0.0025
±0.002
Offset bounds
±0.0215
±0.02345
±0.0339
±0.0016
±0.0041
±0.01195
±0.00945
Standard error for the slope and offset coefficients in the transfer functions (bounds/4.3):
