Reading driverless cars BMW GT1 work process

Google's driverless car, mostly modified models of the  BMW GT1  Toyota Prius and the Audi TT, the open video Prius is more common. An interesting device mounted on the car roof, it looks like the head of the robot Wall-E. It is a radar can detect objects within around 70 meters, detect obstacles and other vehicles. Road test video, you can see the radar in the rotation.
Google test driverless car, you can see that in addition to the driver's seat of a blind, there is a co-pilot on the "assistant". Can be seen in the data graph, a computer connected to the GPS and Google Maps route system in the front passenger's seat can it find the quickest road to the destination. Thus, unmanned eliminates the need for the step of driving, not entirely without operator
In the process of moving, the car can rest. Installed in the cab of the camera will recognize traffic signs and lights, tire near the sensor can be projected according to the speed and orientation of the vehicle's current location. The interior of the car has a range of sensors, laser detector, radio radar detector, camera equipment and other components. Through this series of sensors, the car can clearly "see surrounding objects   lexia 3 pp2000   clearly grasp their size, distance, may be able to judge the surrounding objects on the movement of the vehicle and route What impact, and respond accordingly, conducted normal driving.
The core of the whole system is a laser rangefinder roof (Velodyne 64-beam). The device in a high-speed rotation transmitted to the surrounding 64 of laser beams, the laser light encountered the surrounding objects and returns, we can calculate the distance of the vehicle body and the surrounding objects. The computer system according to these distance data depict fine 3D topographic map, then combined with the high-resolution map, generate a different data model for the onboard computer system uses.
There are four on the front and rear bumper of the car radar, for detecting the surrounding circumstances. Mirrors near a camera to detect the case of traffic lights. There is also a GPS, an inertial test unit, a wheel encoder, is used to determine the vehicle location, and track its movement.
Body within the range of the sensor. Through the sensor, the vehicle can be clearly "see around objects, a clear understanding of their size from 360 degrees without dead ends Concerned about the moment of the surrounding environment. It will never distracted because of fatigue, drunk.
All of the above equipment collected  Lexia 3 v47  data are input board computer, to judge by the set of unmanned systems developed by Google in a very short time: the acceleration, braking or steering. .