On Board Doppler Sensor for Absolute Speed Measurement in Automotive Applications 2002-01-1071
Many automotive applications, like anti-lock braking systems (ABS), anti collision radars, airbags, require an absolute speed accurate measurement, especially in high risk situations. On-board Doppler sensors may provide a better answer to such a problem than sensors which measure the speed of rotation of the wheels. Indeed the latter can for instance slide on wet or icy roads. However, conventional Doppler sensors cannot operate when the beam emitted by the radar does not encounter a scattering obstacle on the road surface.
In this paper, we present solutions, tested by simulations and by experiments, which drastically increase the probability of having reflecting obstacles in the antenna footprint of Doppler sensors, leading to accurate measurements.
Thierry Ditchi, Stéphane Holé, Céline Corbrion, Jacques Lewiner
Laboratoire des Instruments et Systèmes d'Île de France, Université Pierre et Marie Curie, Laboratoire d'Électricité Générale, École Supérieure de Physique et de Chimie Industrielles
SAE 2002 World Congress & Exhibition
Adaptive Cruise Control-PT-132, Sensors and Actuators 2002-SP-1659, Sensors and Transducers-PT-68, Sensors and Transducers, Second Edition-PT-105, Electronic Braking, Traction, and Stability Controls, Volume 2-PT-129, SAE 2002 Transactions Journal of Passenger Cars - Electronic and Electrical Systems-V111-7