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Radar Technology 2

Assistance systems rely on sensors. Apart from radar, there are still Lidar (laser technology), cameras, infrared, each provided with appropriate strengths, hardly one indispensable. Reserved is the frequency band 76 to 77 GHz. The range at 24 GHz is considered obsolete, new is the 77 - 81 GHz area. Since radar sensors basically rely on reflections, they always include a receiver. The evaluation directly at the sensor is optional.

Wavelength 4 mm

An analysis of only the transit times back and forth is sufficient for detecting dormant media. Speed of movements and perhaps also their direction can only be determined by comparing the transmitted and received frequencies. It is interesting if the frequencies are not output evenly.

Rotating radar antenna on the roof is too expensive.

Radar is used in the vehicle for the long distances. Even at a distance of 100 to even 150 meters, the corresponding sensor technology perceives the vehicle. This allows enough room for maneuver even at higher speeds. Incidentally, the device, which is often installed in the grille, also integrates a considerable amount of software.

Continental will begin in 2019 with the fifth generation of near and far range sensors. Meanwhile, even 'smaller' items, such as a lost spare tire or a dropped muffler will be detected. In the far range, up to 300 m are possible at an angle of approx. 60°.

Continental expects about 30 million delivered radar sensors by the end of 2017. Hella claims to have produced much more than 10 million 24 GHz sensors. As a specialist for long-distance radar, however, applies Bosch, to which Continental makes increasingly competitive here.

Without networking, it is difficult, even though it takes longer to reach connections to fixed points and other vehicles. A way out would be to use an existing connection as quickly and completely as possible before the next radio hole threatens. The fifth generation will also be able to work together with Automotive Ethernet beyond CAN systems.

The fact that there will be sensors with only 200 m range and 45° viewing angle, you can see the wide range of services. Also, the size of this sensor is important because of the placement in the vehicle. Overall, however, the higher resolution benefits the better recognition of potentially more difficult situations. 12/17

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