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Speed simulator / Traceability and Uncertainty Walter Fasel

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Presentation on theme: "Speed simulator / Traceability and Uncertainty Walter Fasel"— Presentation transcript:

1 Speed simulator / Traceability and Uncertainty Walter Fasel

2 Examination of Speed Systems Agenda
CW-RADAR speed systems FMCW (2 D or 3 D) RADAR speed systems 3. LIDAR speed systems 4. LOOP detector speed systems METAS

3 Examination of Speed Systems
CW-RADAR speed systems METAS

4 CW Radar speed systems Measurement situation on the road METAS

5 CW Radar speed systems Complexity of realistic measuring situation on the road Centre of gravity motion of the measured vehicle (v, a) Rotational motion of wheels (0 – 2v) Orthogonal motion of inclined surfaces of the car body induced by the bumpiness of the road (v, a) Reflections from other objects (vehicles) within the radar beam Measuring error due to finite beam width METAS

6 CW Radar speed systems Speed comparison on the road (motorway) METAS

7 CW Radar speed systems Speed comparison on the road (motorway)
Disadvantages of a comparison on the road Speed limits (depends on road category) The number of vehicles per vehicle categories are random Time intense and depends on the climatic situation Sometimes difficult at dense traffic condition METAS

8 CW Radar speed systems Doppler signals from different vehicles (road)
Doppler signal, simple car Doppler signal, Motorcycle METAS

9 CW Radar speed systems Speed comparison with simulation in the laboratory METAS

10 CW Radar speed systems Doppler signals from different vehicles (Simulation) Doppler signal, simple car v = 73,4 km/h, a = -0.2 m/s2 Doppler signal, small truck v = 72,6 km/h, a = -0.8 m/s2 METAS

11 CW Radar speed systems Speed comparison with simulation in the laboratory METAS

12 CW Radar speed systems Speed comparison with simulation in the laboratory METAS

13 Examination of Speed Systems
FMCW (2 D or 3 D) RADAR speed systems METAS

14 FM-CW (2D or 3D) Radar speed systems
Radar which measure speed, distance and angle Multi Target, Tracking radar Principle: Doppler effect / phase runtime ~ 7° measurement angle, adaptive cosine correcting ~ 10° - 15° vertical, ~ 20° - 40° horizontal beam width ~ 24 GHz, FSK modulation METAS

15 FM-CW (2D or 3D) Radar speed systems
Tracking lines form different vehicles (motorway) METAS

16 FM-CW (2D or 3D) Radar speed systems
Speed comparison with simulation in the laboratory METAS

17 FM-CW (2D or 3D) Radar speed systems
Speed comparison without angle simulation METAS

18 FM-CW (2D or 3D) Radar speed systems
Speed comparison with angle simulation METAS

19 FM-CW (2D or 3D) Radar speed systems
Mean / Standard Deviation for different categories METAS

20 FM-CW (2D or 3D) Radar speed systems
Distance measurement quality METAS

21 FM-CW (2D or 3D) Radar speed systems
Acceleration / Deceleration measurement quality Sensor 1 METAS

22 FM-CW (2D or 3D) Radar speed systems
Acceleration / Deceleration measurement quality Sensor 2 METAS

23 Examination of Speed Systems
LIDAR speed systems METAS

24 LIDAR speed systems Measurement situation on the road METAS

25 LIDAR speed systems Speed comparison with simulation in the laboratory
METAS

26 LIDAR speed systems Speed comparison with simulation in the laboratory
METAS

27 LIDAR speed systems Check of beam profile METAS

28 LIDAR speed systems Speed measurement quality METAS

29 LIDAR speed systems Speed with Distance step check METAS

30 LIDAR speed systems Distance measurement quality METAS

31 LIDAR speed systems Acceleration / Deceleration measurement quality
METAS

32 Examination of Speed Systems
Loop detector speed systems METAS

33 LOOP detector speed systems
Inductive loop detectors METAS

34 LOOP detector speed systems
Inductive loop detectors (frequency response road) METAS

35 LOOP detector speed systems
Math. model street METAS

36 LOOP detector speed systems
Simulation solution METAS

37 LOOP detector speed systems
Speed measurement quality METAS

38 Thank you very much

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