Track Geometry Measurement System
TGMS

TGMS is a monoblock construction containing a specially designed Strapdown Inertial Navigation System (SINS) and profilometer based on two laser scanners. The track geometry parameters are measured according to the standard EN 13848.

Track geometry measurement system (TGMS) is intended for contactless measurement of traditional track geometric parameters such as longitudinal level, cross level, superelevation, twist, curvature, rail profile, etc. on high-speed trains (up to 350 kmph).

TGMS is a monoblock construction containing a specially designed strapdown inertial navigation system (SINS) and profilometer based on laser scanners. The track geometry parameters are measured according to the standard EN 13848.

TGMS provides a high accuracy positioning through geographic (latitude and longitude) and track coordinates.

TGMS features adjustable for customer requirements software and hardware interfaces.

		SINS based on FOG
		Designed for railway applications and based on Fiber-Optic Gyros (FOG) SINS provides a continuous determination and output of position coordinates, motion parameters and attitude angles.
Laser scanner
Laser scanners record, measure and evaluate rail profiles using laser triangulation principle.

Geometrical parameter	Resolution	Measurement uncertainty	Range of measurement
Track gauge	≤ 0.5 mm	± 1 mm	-15 / +50 mm
Longitudinal level	≤ 0.5 mm	± 1 mm (3 m < λ ≤ 25 m)	± 50 mm (3 m < λ ≤ 25 m)
		± 3 mm (25 m < λ ≤ 70 m)	± 100 mm (25 m < λ ≤ 70 m)
		± 5 mm (70 m < λ ≤ 150 m)	± 300 mm (70 m < λ ≤ 150 m)
Cross level	≤ 0.5 mm	± 5 mm	± 225 mm
Alignment	≤ 0.5 mm	±1.5 mm (3 m < λ ≤ 25 m)	±50mm (3 m < λ ≤ 25 m)
		± 4 mm (25 m < λ ≤ 70 m)	± 100 mm (25 m < λ ≤ 70 m)
		± 10 mm (70 m < λ ≤ 200 m)	± 500 mm (70 m < λ ≤ 200 m)
Twist	≤ 0.5 mm	± 1.5/L mm/m (L ≥ 5.5 m)	± 15 mm/m
Navigation and attitude parameters			Accuracy
Geographical coordinates (latitude and longitude)			1 m
Heading			0.1 deg
Roll and pitch			0.07 deg

Operating Parameters
Speed range	5 ... 350 km/h
Data output rate	1 kHz
Readiness time	max 15 minutes
Continuous operation	unlimited
Interface	USB, Ethernet, etc
Supply voltage	220 V
Operating system	Windows / Linux
Operating temperature	-40° C ... +60° C
Power consumption	< 50 W