Speed simulator / Traceability and Uncertainty Walter Fasel

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Presentation transcript:

Speed simulator / Traceability and Uncertainty Walter Fasel

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 17.09.2018

Examination of Speed Systems CW-RADAR speed systems METAS 17.09.2018

CW Radar speed systems Measurement situation on the road METAS 17.09.2018

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 17.09.2018

CW Radar speed systems Speed comparison on the road (motorway) METAS 17.09.2018

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 17.09.2018

CW Radar speed systems Doppler signals from different vehicles (road) Doppler signal, simple car Doppler signal, Motorcycle METAS 17.09.2018

CW Radar speed systems Speed comparison with simulation in the laboratory METAS 17.09.2018

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 17.09.2018

CW Radar speed systems Speed comparison with simulation in the laboratory METAS 17.09.2018

CW Radar speed systems Speed comparison with simulation in the laboratory METAS 17.09.2018

Examination of Speed Systems FMCW (2 D or 3 D) RADAR speed systems METAS 17.09.2018

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 17.09.2018

FM-CW (2D or 3D) Radar speed systems Tracking lines form different vehicles (motorway) METAS 17.09.2018

FM-CW (2D or 3D) Radar speed systems Speed comparison with simulation in the laboratory METAS 17.09.2018

FM-CW (2D or 3D) Radar speed systems Speed comparison without angle simulation METAS 17.09.2018

FM-CW (2D or 3D) Radar speed systems Speed comparison with angle simulation METAS 17.09.2018

FM-CW (2D or 3D) Radar speed systems Mean / Standard Deviation for different categories METAS 17.09.2018

FM-CW (2D or 3D) Radar speed systems Distance measurement quality METAS 17.09.2018

FM-CW (2D or 3D) Radar speed systems Acceleration / Deceleration measurement quality Sensor 1 METAS 17.09.2018

FM-CW (2D or 3D) Radar speed systems Acceleration / Deceleration measurement quality Sensor 2 METAS 17.09.2018

Examination of Speed Systems LIDAR speed systems METAS 17.09.2018

LIDAR speed systems Measurement situation on the road METAS 17.09.2018

LIDAR speed systems Speed comparison with simulation in the laboratory METAS 17.09.2018

LIDAR speed systems Speed comparison with simulation in the laboratory METAS 17.09.2018

LIDAR speed systems Check of beam profile METAS 17.09.2018

LIDAR speed systems Speed measurement quality METAS 17.09.2018

LIDAR speed systems Speed with Distance step check METAS 17.09.2018

LIDAR speed systems Distance measurement quality METAS 17.09.2018

LIDAR speed systems Acceleration / Deceleration measurement quality METAS 17.09.2018

Examination of Speed Systems Loop detector speed systems METAS 17.09.2018

LOOP detector speed systems Inductive loop detectors METAS 17.09.2018

LOOP detector speed systems Inductive loop detectors (frequency response road) METAS 17.09.2018

LOOP detector speed systems Math. model street METAS 17.09.2018

LOOP detector speed systems Simulation solution METAS 17.09.2018

LOOP detector speed systems Speed measurement quality METAS 17.09.2018

Thank you very much