A Real Example: Cost-effectivness of an Optical Technology System
Installation of a structural health monitoring system on a 150m concrete bridge, including 35 strain measurement points, 12 triaxial accelerometers, 10 displacement sensors and 4 temperature measurements.
For the optical system, additional 35 temperature compensation sensors need to be considered for eliminating the temperature effect on the strain measurements.
Distribution of the different packages on the overall budget (click to enlarge):
When comparing the cost of each package, we clearly see the big difference in the cost of optical sensors, since the number of sensors is increased by the required temperature compensation.
However: taking the involved number of signals in account, the data acquisition system is considerably less expensive when using optical technology. The same occurs with the cost of the installation. The cost of the accessories, mainly the cables due to the distances, is also highly reduced when opting for optical technology.
Cost advantage: optical vs. conventional
For such a simple structure, a structural health monitoring system based on optical technology would be around 95% of the cost of a conventional system.
|4. System Installation ||75%|