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direct time of flight (DToF)

Time-of-Flight procedures are procedures in which the distance between the transmitting unit is determined by means of radio technology or a light beam. In addition to the classic ToF method, there are Direct Time of

Flight (DToF) and Indirect Time of Flight (IToF). Both methods work with pulsed lasers

and are used inautomotive

lidar systems. TheDToF method is more suitable for longer distances, the IToF method for shorter distances.

The DToF method works with a pulse method, in which the laser pulse generated by the lidar system

can be changed in thepulse width. The distance between the motor vehicle and the reflecting object - which can be another traffic vehicle, a pedestrian, a road buoy, a tree, a light pole or another obstacle - is determined by the travel time to the obstacle and back and the speed of light. By reducing the pulse width, the reflections

areeasier to distinguish and a higher file resolution is achieved.

The IToF method is different, as it compares the phase of the transmitted signal with the reflected pulse sequences and uses this to determine the distance. This method can also be used for 3D object creation.

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Englisch: direct time of flight - DToF
Updated at: 11.12.2020
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