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Every modern vehicle is equipped with advanced driver assistance systems (ADAS). One of the challenges of ADAS testing is to precisely measure relative position and velocity from car to car when testing longitudinal control systems and to track the car in the testing of lateral control systems.
One of the challenges when testing the longitudinal control system, ACC is measuring precisely the relative position and velocity between two or more vehicles (sheer in/out manoeuvres). But the most important feature for gaining high-quality measurement data is perfect synchronization of all signal sources.
AEB tests according to Euro NCAP standards require relative measurements to a virtual vehicle target
(balloon car) that does only carry an IMU for determining the absolute position. Normally,
the position data is transmitted over Wi-Fi.
In addition, driving robotics is needed to control the longitudinal and lateral movement of the vehicles during the test to ensure the repeatability of the test. DEWETRON’s mixed signal approach to acquire synchronized input signals from all sources is essential for the accuracy and the comparability of the data.
The main goal of FCW tests is to measure when the driver is warned of an imminent crash, as the warning might be available on the CAN bus much earlier than the acoustic/haptic warning.
Before being approved for the US market, vehicle manufacturers who offer FCW have to test their system to comply with the FCW confirmation test defined by the National Highway Traffic Safety Administration. The DEWETRON systems for FCW tests are fully compliant to the NHTSA requirements and specifications.
For tests of lateral control systems such as lane departure warning or lane keeping assistant (LDW/LKA), the measurement system needs to calculate the relative position, angle and velocity between the vehicle and stationary objects, such as lines, curbs or traffic signs. Moreover, the acquisition of synchronized video data is important for such tests.