ADAS system multi-sensor signal space-time synchronization control system and method

Abstract

The invention discloses an ADAS system multi-sensor signal space-time synchronization control system and method, and belongs to the technical field of vehicles, and the method comprises the steps that: a light collection module collects natural sunlight to obtain a carrier-capable reference light wave signal with the consistent vibration direction; after the reference light wave signal is transmitted into a vehicle optical network through an optical door, a part of energy is consumed through an optical dissipation device, so that a target reference light wave signal representing the time before the current moment exists on each optical network of the vehicle; an optical carrier loads the output information of each element ECU on the target reference light wave signal to obtain carrier-carried target information; a sub-controller carries out carrier fusion on the target information in the plurality of network segments connected with the sub-controller so as to synchronize part of network segment information flow; and a central controller carries out carrier fusion on the target information in the whole network segment so as to synchronize the information flow of the whole network segment. The technical problem that space synchronization and space-time synchronization are not achieved due to the fact that time synchronization is carried out only through a timestamp in an existing related braking system is solved.

Description

technical field [0001] The invention belongs to the technical field of vehicles, and more specifically relates to a system and method for multi-sensor signal time-space synchronization control of an ADAS system. Background technique [0002] Time synchronization technology is an essential part of the advanced driver assistance system ADAS control field. The original vehicle signals are sent sequentially, and the controller receives them sequentially. For example, after turning on the wiper switch, the BCM vehicle controller receives the signal after dozens of milliseconds , and then request the wiper controller. It is a one-time process. However, with the increasing development of intelligent driving today, the integration of vehicle data, intelligent driving ADAS requires a lot of sensors, such as: millimeter wave radar, environment perception camera, angle radar, ultrasonic radar, visual camera, etc.; it needs to control actuators There are also many such as EMS\ESC\EPS,...

AI Technical Summary

Problems solved by technology

[0004] 1) The chain reaction caused by the unequal signal period, explaining: Assuming that the signal period of the A controller ECU is 20ms, at a certain moment A is disturbed or the calculation is complicated, so that the A controller ECU fails to calculate the output signal group within 20ms; resulting in two The signal interval is uneven; in turn, the other controllers have not received the signal timeout, resulting in uneven interval between the two signals; after multiple transmissions are amplified, the delay is greater than the safety requirement, and the system crashes and exits

[0005] 2) The inversion of the signal timing. At a certain moment, A is disturbed or its own calculation is complicated, so that the A controller ECU fails to calculate the output signal group within 20ms; but at the next moment, it performs simple and fast calculation and normal output; the latter appears first. On the CAN network; because other controllers are temporarily unable to judge the reason why the signal did not appear in the previous time; trigger to deal with frame loss or other feedback judgments

In order to ensure comprehensive and timely signals, each controller ECU uses real-time broadcasting to broadcast all signal groups of 1-N time stamp signals to the CAN network segment synchronously. Each group of signals contains all parameter information, and then reads useful signals according to their own needs. , so the network load is extremely large

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