The new Amberg IMS railway surveying system

Transcription

1 Rail Technology Conference, Paris The new Amberg IMS railway surveying system AMBERG TECHNOLOGIES, Regensdorf-Watt Christian Eichwald Team Leader Customer Support Rail 1

2 High-Speed Programme China km HSR in 10 years Design speeds up to 350 km/h > 70% Slab Track 2

3 Inspection & Maintenance Track inspection Challenge Error localisation for exact sleeper position ± m 3

4 Measurement concepts during construction Characteristics Highly precise Demand for personnel Quantity & Qualification Low measurement performance 4

5 Measurement concepts for maintenance Concepts of construction phase not suitable for maintenance! Pure relative concepts not suitable: - Short chords not suitable for high-speed - Missing absolute reference for specific correction tasks 5

6 IMU in track surveying?! Characteristics Measurement accuracy Relative inner track geometry: Absolute track geometry / localisation: High measurement speed Highly precise Unprecise > 200 km/h 6

7 What is IMU technology? Basics IMU = Inertial Measurement Unit Several inertial sensors compose an IMU Inertial sensors measure Linear accelerations Angular accelerations P3 ωip p ωip3 P2 Every movement of the sensor in 3D space is acquired and registerd P1 Result: 3D space curve 7

8 Amberg IMS System Track surveying with inertial measurement technique Faster more precise more efficient

9 Inertial measurement technique for hand-pushed trolley AMU Inertial measurement unit AMU = Amberg Measurement Unit Inertial high-precision sensor 3 gyros and 3 acceleration sensors Integrated on-board computer Technical specification Measurement frequency up to 1000 Hz Drift 0.02 /h Initialisation sequence 2 x 8 minutes Application accuracy: +/-1 mm versine accuracy at 150 m chord length 9

10 Amberg IMS principle 3D track surveying Basic principle Transformation Relative to Absolute IMU Control point meas. Measurement of relative track geometry (local 3D trajectory) Georeferencing by known control points in track coordinate system Corrected 3D trajectory Control point IMU trajectory Challenge: Compensation of drift during application of long-chord method 10

11 Amberg IMS measurement modes IMS 1000/3000 Single CP Mode Long-chord high-speed mode Application: Ballast track and Slab track Multi CP Mode Geodetic long-chord precision mode Application: Slab track 11

12 Traditional long-chord mode IMS 1000/3000 Single CP Mode Long-chord high-speed mode Long-chord method Continuous (kinematic) measurement, up to 4 km/h CP measurement at start and end point of chord Highest relative accuracy Accuracy [mm] CP interval [m] +/- 3 < 100 m +/- 5 < 200 m +/- 10 < 500 m 12

13 System accuracy Comparison of IMS 3000 vs. EM-SAT EM-SAT Long-chord Method IMS 3000 Single CP Long-chord Mode 13

14 Comparison of IMS 3000 vs. EM-SAT Vertical track error 1 mm Measurement EM-SAT Measurement IMS 14

15 Technology for track surveying Influences on efficiency, accuracy and safety 15

16 IMU technology for track surveying Weitere Aspekte operativer Einsatz Site works influence measurement performance 16

17 IMU technology for track surveying Refraction influences measurement speed & accuracy 17

18 IMU technology for track surveying Method Sighting Geodetic 3D IMU Long-chord Measuring Unit Optical GRP 1000 IMS 3000 Sight corridor Required Required Not needed Refraction Influence Influence No Influence Personnel 2 Operator 2 Assistants 1 Operator 1-2 Assistants 1 Operator 1 Assistant Project performance 100 m/h 600 m/h 2500 m/h Typical Accuracy Relative +/- 3 mm +/- 1 mm +/- 1 mm Absolute +/- 5 mm +/- 1 mm +/- 2-5 mm 18

19 Amberg IMS System A revolutionary (?) An innovative measurement system Thank you very much for your attention!

20 Christian Eichwald Team Leader Support Rail