Three Dimensional Model Construction Method for the Bridge Maintenance

The UAV equipped with Visual SLAM made it possible to shoot the entire bridge including the inside of the bridge.A three-dimensional bridge model is constructed by using the photographs taken by UAV and the abnormality and damage of the bridge are accurately recorded by using the bridge inspection record system.

In Japan, large-scale disasters such as earthquakes and floods occur frequently. As a result, a minor to significant failure of the road and bridge may occur and hence the emergency inspection in the event of the disaster is necessary. In order to accurately grasp the accurate failure state of the bridge after the disaster, 3D model constructed at the time of the regular inspection will be used.

1.  3D model Bridge Construction Method during normal conditions
1) Shooting Method for the bridge using UAV


2) 3D model Bridge Construction Method by sfM processing


2.  Bridge inspection record system
1) Damage Confirmation

2) Recording Damage Information







 

UAV driven Bridge Inspection Technology Verification in Japan