AUTOMOTIVE Supplier Business Opportunities on ADAS …cdn.ihs.com/www/pdf/20161019-AutoConf-Tokyo-ENG-Matsubara.pdf · Supplier Business Opportunities on ADAS and Autonomous Driving
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Why Laser Scanner?• Current-generation sensors used by collision warning/avoidance functions have their own
bottlenecks.
> Image sensors provide designed performance under normal daylight conditions. They do not provide responsive performance under dim lights or when the weather conditions change suddenly (rain, snow, etc.).
> Radar sensing is the primary choice for distance estimation for collision avoidance functions. The bottleneck is that a single radar sensor is used for the detection of objects.
> Use of ultrasound sensors is limited to short-distance detection and parking assist functions.
> Unlike image sensors, laser sensors are not affected by ambient light conditions. Therefore, laser sensors can be used to supplement the object detection function of image sensors and the distance estimation function of radar.
> The ability to acquire positional information on detailed, high-resolution 3D map based on point cloud image data becomes a motivation to install a LIDAR scan system on autonomous cars.
Laser Scanner Solutions Classification• Motor-driven mechanical system
> Presently, OEMs are testing the system; only mechanical systems can be used for production vehicles. > It is difficult to reduce the unit size and the cost is high.
• Flash system> The system captures a 3D range image using infrared light just like a camera.> The biggest feature of the high-resolution 3D Flash LIDAR technology is that it enables real-time and simultaneous image
recognition and surrounding environment recognition.> The system provides a detailed and accurate view of the area around the vehicle and maintains its robust performance
throughout the day and night and under unfavorable weather conditions.• MEMS system
> The system uses MEMS technology that utilizes small mirrors in semiconductor processes. Downsizing is possible at low cost.> The system uses several fixed laser beams.> It is small and low in cost.
• Optical phased array system> The system consists of many phase shift elements arranged on a plane. These elements emit radar waves, each with a
slightly shifted phase. By overlaying the reflected and returned radar waves, the system can detect the positions of objects in the surrounding area as well as their 3D shapes.
> The greatest merit is that the system can operate the beams at high speed. (High-speed scan)> The issue is that the wavelength of the light is short (1/several thousand). Therefore, it is necessary to manufacture an array
chip with an accuracy of 100 nanometers or better and also to eliminate the effects of environmental fluctuations during operation.
• VCSEL system> Vertical cavity surface-emitting laser can be performance-tested in wafer units.> Use of 2D array is possible.> Low power consumption.
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