BRIDGE AND VIADUCT STRUCTURE MOBILITY MONITORING STATIONS

GeoWAN gateway

• Third generation intelligent flexible mesh network monitoring platform/architecture
• Range up to 300 meters (gateway to node or node to node), in optimal conditions
• Battery life up to 15 years
• Best for dense wireless sensor node deployments
• Standard reporting rate: 10 minutes
• Fully remotely configurable
• Available with intelligent and triggered sampling rates based on actual movement of sensors to minimize human intervention
• It can function as a smart solution with multiple structural and geotechnical sensor types and integrated 4G cameras.
• Compatible with all geotechnical and structural sensors
• Ideal applications; tunnels, railway tracks, bridges, walls, piles, structures, geotechnical earthworks and soil water content measurements

• Long-range point-to-point wireless platform, ideal for harsh environments, able to ‘see’ through solid obstacles
• Up to 15km range (gateway to node) in optimal conditions and typically 2-4km in denser urban environments
• Battery life up to 15 years
• Standard reporting rate: 1 hour
• The number of nodes in the network will affect reporting speed
• Remotely configurable, but more limited bandwidth available
• No triggered detection from other nodes in the network
• Compatible with all geotechnical and structural sensors
• Ideal applications: congested urban environments, long-range applications where sensors are dispersed over large areas, applications where communication through obstacles is required, and sites where grid power is available

Optical Displacement Sensor + Tri-Axis Tilt + internal temperature sensor

Solution:
ODS: 0.1mm  
Eğim: 0.0001°

Repeatability:
ODS: +/- 0.15mm Eğim: +/- 0.0025°

Range:
ODS: 0’dan 50-150m Eğim: +/- 90°

Three-axis Tilt sensor + internal temperature sensor

Solution:
0.0001° /
0.00175 mm/m

Repeatability:
+/- 0.0025° /
+/- 0.00436 mm/m

Range:
+/- 90°

Sensor interface Nodes: Crack Sensor Node, VW Node, MVV Node

Solution:
Essentially infinite (depends on interface sensor type)

Repeatability:
Essentially infinite (depends on interface sensor type)Crack Sensor: <0.01 mm

Range:
Essentially infinite (depends on interface sensor type) Crack Sensor: 0 to 25-200 mm

Tilt sensors to monitor deflection of the structure and chains of tilt sensors to create a longitudinal settlement profile along the structure. The aim is to measure potential damage to the structure throughout its design life and after events such as earthquakes. Crack sensors to monitor structural defects and cracks. Strain Gauges to monitor stress in beam members.

Optical displacement sensors – distance measurement provides information about the deformation of the targeted structure, and inclination measurement informs the user about the stability of the sensor itself and the reference structure on which it is mounted.

The Crack Sensor Node with potentiometric crack sensors is used to monitor structural movement including pile separation, crack movement, and expansion joint movement. In combination with tilt sensors the potential deflection of the structure is found.