When testing vision systems for lane departure warning and active safety it is important to have a measure of the curvature of the lanes. Lane departure warning systems that work effectively on curved roads need lane curvature. The curvature is used to predict whether the current vehicle trajectory will leave the lane and whether the driver should be alerted to the problem. It is also possible to warn drivers who are going too fast before the reach danger.
Using new outputs from the RT-Range the curvature of each line is computed and output over the CAN bus. The output is available in real-time so that it can be captured and compared to real-time sensor data. Two additional CAN messages are used to compute the curvature of each of the 8 lines that can be added to the map. The real-time display running on a PC can also display the curvature information so that drivers can check everything during the test.
The RT-Range also computes the curvature of the vehicle at three points. Normally users configure these points to be the centre of gravity and the two wing-mirrors where lane marking sensors can be found. The new curvature outputs have been added to existing CAN messages and are available in the real-time display.
The new curvature output will make the job of testing ADAS sensors easier for engineers by providing instant results without the need for the engineer to develop large data processing software. Because the outputs are derived by the RT Inertial+GPS Navigation System they are a true independent reference that can be used reliably.
The RT-Range is the frontier product from OxTS for developing and testing sensors for ADAS applications. Multiple systems are used by Ford, Volvo, BMW, VW, GM and many other automotive manufacturers. Nearly 100 vehicles worldwide are using RT-Range products, making the RT-Range the preferred choice for the advanced ADAS research departments throughout the world.
