Strain Sensor Network
Fiber Bragg Grating Strain Sensor Network
A Fiber Bragg Grating strain sensor network is an optical structural health monitoring system distributed across critical Ark settlement structures to measure mechanical strain, deformation, and load distribution. The 10-kilogram system uses wavelength-multiplexed optical fibers containing 200 passive sensors to achieve 1-microstrain resolution across structural components while consuming 10 watts of power. Operating in an environment devoid of a protective magnetosphere, the network routes signals from the passive optical fibers into a radiation-tolerant optical interrogator, delivering a 25-year operating life and a mean time between failures of 200,000 hours.
Fiber Bragg Grating (FBG) strain sensor network distributed across critical Ark structures detecting strain, deformation, and load distribution.
Purpose
Fiber Bragg Grating (FBG) strain sensor network distributed across critical Ark structures detecting strain, deformation, and load distribution.
Context
Child of L2-SSM-SHM within the Lunar Ark system
Principles
- ▸FBG sensors wavelength-multiplexed in optical fibers
- ▸Sub-microstrain resolution
- ▸Distributed network across structures
- ▸Per IEEE FBG SHM aerospace standards
- ▸Long-life passive sensors
Typical implementations
- ▸Aerospace SHM with FBG (terrestrial)
- ▸Aerospace structural test sensors
- ▸Industrial SHM with FBG
Lunar considerations
- ▸Long-life passive optical sensors
- ▸Multi-point sensing via single fiber
- ▸Rad-tolerant optical interrogator
Specifications
Functional
| primary function | Fiber Bragg Grating (FBG) strain sensor network distributed across critical Ark structures detecting strain, deformation, and load distribution. |
| sensors | 200 |
| resolution microstrain | 1 |
Physical
| mass kg | 10 |
| materials | FBG-written optical fibers, Optical interrogator |
| vacuum compatibility | True |
Operational
| power consumption w | 10 |
| thermal range c | -40, 70 |
| lifetime years | 25 |
| mtbf hours | 200000 |
Interfaces
Provides
- Strain data
- Structural strain telemetry
Requires
- Interrogator (~10 W)
Cite this entry
Lunar Ark Codex. "Strain Sensor Network" (L3-SSM-SHM-STRAIN). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-SSM-SHM-STRAIN
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.