The invention relates to a rail
subgrade settlement measuring method based on combination of camera shooting, a
satellite and
inertia measurement. A vehicle platform is provided with a camera, a
satellite positioning
assembly, an
inertia measurement
assembly, a time synchronous
system, a rail vehicle relative measurement
system, a
data processing special-purpose computer and the like.
Satellite positioning differential base stations and camera shooting survey mark base stations are distributed along a rail to constitute a combination measurement
system of camera shooting, the
satellite and
inertia measurement or a combination measurement system of camera shooting and inertia measurement or a combination measurement system of the satellite and inertia measurement, high-precision vehicle-mounted dynamic position, altitude and
speed measurement references are built through
deep integration of camera shooting, the satellite and inertia measurement, high-precision measurement of rail and
subgrade measurement parameters is maintained for a long time according to the rail vehicle relative measurement system, and by comparison with rail
design standard data, automatic, high-precision, long-time and
continuous measurement of rail
subgrade settlement and rail geometric parameters is achieved.