Measuring instruments and equipment: Swiss Quality

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.


TGMS prototype

TGMS 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.

TGMS
  TGMS
Laser scanner
Laser scanners record, measure and evaluate rail profiles using laser triangulation principle. TGMS

TGMS software

TGMS software

Recordable Parameters

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


Fin-de-Praz 24, CH-2024 St-Aubin, Switzerland tel +41 (0)32 835 35 15 fax +41 (0)32 835 35 54 www.zgoptique.ch