The Trimble GEDO systems for measuring railway lines capture the absolute track position, cant (superelevation), and track gauge. Measurements are taken continuously during the trolley movement. Points with specific coding information can be registered along the way. The track recording meets the high requirements for precision and productivity. The measurements are carried out without reference to the track design alignment and serve as a planning basis for track reconstruction and expansion, or as a basis for acceptance after track reconstruction or new track construction.
Trimble GEDO systems can be used to record data from a wide variety of tracks, including main lines, siding tracks and connecting tracks, as well as tramways and underground railways. Tracks in industrial areas and factory railways can also be recorded.
The surveying of the track position can be carried out with different Trimble GEDO system configurations. The Trimble GEDO Rec system is used for classic geodetic recording with total station or GNSS. The Trimble GEDO IMS system uses inertial measurement technology for highly productive track recording.
The Trimble GEDO Rec system is used for geodetic track surveying. It consists of the Trimble GEDO CE 2.0 track measurement trolley with a Trimble control unit in combination with a Trimble total station or Trimble GNSS receiver.
When used with a Trimble S-Series total station, the Trimble GEDO track measurement trolley can measure up to 600 m of track (or 1,200 m with two total stations) per hour with millimeter accuracy. When used with a Trimble GNSS receiver, 3,000 m per hour can be measured with centimeter accuracy.
The Trimble GEDO IMS system consists of the Trimble GEDO CE 2.0 track measurement trolley, a Trimble GEDO IMU and a Trimble control unit. A Trimble GEDO Profiler or Trimble total station is part of the system as well.
The GEDO IMS system uses the most modern inertial measuring technology. The combination with an electro-optical laser measuring unit enables track recording with very high accuracy and a productivity of over 2,500 m and up to 5,000 m per hour.