Transfert de technologie

The UWB Radar System

> Environment & Civil Engineering

Remote monitoring and measuring of: rock faces, fallen rock zones, earthquake risk zones, volcanic risk zones, landslides, constructions, structures...

Ultra Wide Bandwidth (UWB) radar, Remote monitoring, Volcanic risk, Earthquake risk, Landslide monitoring

Mobile, non invasive remote monitoring and measuring patents to assess:
- Stabilisation state
- Mitigation, detection of rate of change
- Falling object prediction (Falling rocks)
All weather conditions, continuous monitoring with immunity to passive interference such as bad weather conditions or dust, pollution etc.
Safe: Low average transmitted Power (1mW) and no power or data transmission needed on/from monitored site.
Accuracy: 10^-13 sec, corresponding to 15 µm in range.
Accurate monitoring of inaccessible areas.
Monitoring range in the order of 1 km, with less than 10^-5 m displacement detection.

Ability to measure "sliding rate" and mitigation, thus detecting changes.
Achieved through use of passive and robust devices positioned on sliding area (trihedrons).
Both optical and radar methods used and results compared for more accurate results.
Propagation time radar/trihedrons/radar extracted by use of UWB data processing.

Assessment of collapsed volume stabilisation state by radar and use of numerical modeling
Radar system works on bare soil.

Falling rock monitoring
- Real time prediction of falling objects by simple use of Doppler analysis of the backscattered radar signal
Equipment used
- String extensometers

The Séchilienne Landslide, Romanche Valley, Isère, France.
An example where ONERA landslide monitoring is already in place.

Bienvenue à l'Onera, le centre français de recherche aérospatiale