Method, computer program, electronic storage medium and device for evaluating optical received signal

Abstract

The invention relates to a method (900) for evaluating an optical reception signal (401):-emitting (901) a plurality of optical transmission signals for reception as optical reception signals (401), the respective transmission signals being emitted in an equidistant varying manner; -receiving (902) an optical receive signal (401); -assigning the respective received optical reception signals (401) to the plurality of optical transmission signals; -evaluating (904) the received optical received signals (401) as a function of the associated maximum values (402) of the optical received signals (401).

Description

Background technique [0001] In the next few years, lidar sensors will be established in the realization of highly automated driving functions. In order to cover large horizontal detection angles between 150° and 360°, only mechanical laser scanners are currently known. In a first configuration, in a rotating mirror laser scanner with a maximum detection range limited to about 120°, only the motor-driven deflection mirror rotates. For larger detection ranges up to 360°, all electro-optical components are located on a motor-driven rotating disk or rotor. [0002] Lidar systems with multiple pulses are known. Systems are mainly described in the literature which use such multiple pulses within one measurement. Here, a measurement is understood to mean the emission of a predetermined number of laser pulses. The number is 3 to 6 pulses, sometimes up to 20 pulses, especially 12 pulses. This solution has several disadvantages. [0003] If multiple pulses are used within a measur...

AI Technical Summary

Problems solved by technology

Although this problem can be circumvented by means of a DC power supply, such a source has the problem that very high laser powers can be generated in case of functional failure, whereby eye safety becomes an issue

Here, very expensive security mechanisms are required

[0004] Additionally, such systems have the problem of producing very poor statistics for the measurements due to the typically low number of pulses (typically 3 to 6, sometimes up to 20, especially 12)

This leads to the problem of being able to jump the determined distance in the case of a very low signal

[0012] Furthermore, the signal from an alien sensor is an undesired detection artifact

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