Roger F. Johnson - Seattle WA Allen M. Mitzel - Sumner WA
Assignee:
The Boeing Company - Seattle WA
International Classification:
G01B 1130
US Classification:
33174P
Abstract:
A target comprising a displacement sensitive photodiode perpendicularly disposed with respect to the measuring axis perpendicular to the runway surface is provided above a runway surface under aircraft load. A laser beam is directed towards the diode and signal processing circuits coupled between the photodiode and display means during aircraft loading, and subsequent to aircraft load removal provide signals to the display means representative of displacement of runway surface.