DITEST-SHM - Structural Health Monitoring Solution

DITEST SHM - Features & Benefits
DITEST-SHM is designed to provide unique surveillance capabilities for large and complex civil engineering infrastructure. DITEST-SHM solution offers uninterrupted monitoring for complete mapping of the structure, dedicated strain cables for high resolution strain monitoring and crack detection, full compensation of thermal expansion effects on strain measurements, and permanent long term continuous monitoring.
	Features
	Continuous monitoring of distributed strain or temperature in large civil engineering structures Very large optical loss budget (up to 20 dB) over limited distances to overcome the inherent loss of strain sensing cable integration. Detection of cracks occurence with resolution better than 1 mm Cross compensation between structure deformation and thermal expansion of the material Continuous analysis of very small variations in, strain and temperature along the entire fiber optic sensor and early detection and classification of alerts along the infrastructure. Configuration of Zones with associated alarms and relays activation Data management, system interfacing and communication interface with third party’ systems (SCADA, ....)

Applications

The DITEST-SHM solution is designed to offer turnkey solutions for structural health monitoring.

Civil engineering projects, tunnels, bridges, dams, nuclear plants, ...requiring high accuracy in large strcutures

DITEST-SHM - system Components

DITEST Interogator

DITEST-STA Distributed temperature and strain distributed sensing

Performance

Monitoring distance : > 3 km per sensor
Spatial resolution : 0.5 m (*)
Sampling resolution : 0.1 m
Strain / Temperature resolution : 10 microstrain / 0.5°C (*)
Optical loss budget : >20 dB (*)

(*) Temperature resolution, spatial resolution, distance range and acquisition time are inter-related. See DITEST datasheet or technical note for more information about performance specifications.

Temperature Optical fiber cable

Long range Distributed temperature Optical Fiber Cable
The LTM OFC can accommodate up to 8 fibers. It is a robust cable suitable for direct burial as it integrates rodent protection. The cable includes the optical fibers used for temperature monitoring as well as spare fibers for data communication between the instruments and the control room.

Strain Optical Fiber Cable

Omnisens provides a comprehensive range of strain optical fiber cable to be incorportaed in various type of strcutures (steel, concrete, cables, ...) or ground. The selection of the adequate strain cable is application dependent. Please contact us for more information about monitoring possibilities for your application.

Project Engineering

In each project, Omnisens in collaboration with its solution providers offers project management, specific design specifications with respect to project requirements, complete documentation and implementation plan, installation drawings, training, commissioning and deployment capabilities.

Additional System components

Depending on the project requirements, cabinet, uninterrupted power supplies, batteries, patch panels,
SO-N-2 optical switch modules, data server, can be provided as additional system components.

DITEST Optical Switches - SO-N SERIES

DiTeSt Optical Switches SO-N Series
The SO-N Series is designed to extend the monitoring capabilities of the DITEST measuring unit by adding multiple measurement channels to the reading unit. The SO-N Series is used for the monitoring of large and complex infrastructures where multiple measuring channels are required.