Method and system for data synchronization of vehicle sensor in automatic driving

Abstract

The invention provides a method and system for data synchronization of a vehicle sensor in automatic driving. In order to timely and rapidly perform identification and judgment of environmental factors in automatic driving, high-frequency signals obtained by a high-frequency sensor is preferentially calculated, a time difference of data transmission of high- and low-frequency sensors is calculated, synchronous matching judgment is performed on the high-frequency signals and low-frequency signals, a calculation result of the high-frequency signals is verified through the low-frequency signals, and a controller sends out an execution instruction, thereby shortening analysis time of a central processing unit, improving reaction sensitivity of the sensors in automatic driving and data fusion performance of multiple sensors, and through setting of multilevel judgment, errors brought by abnormal time data are reduced, and a capability of filtering wrong data is increased.

Description

technical field [0001] The invention relates to the technical field of Internet of Vehicles, in particular to a data synchronization method and system for vehicle sensors in automatic driving. Background technique [0002] At present, the automatic driving system includes multiple sensors, such as radar, camera, map, positioning sensor and so on. The frequency of each sensor is different, and the internal clock is also different. The current practice is to process the latest data to ensure real-time performance. In this way, the system frequency will depend on the low-frequency sensor, and the high-frequency sensor cannot be fully utilized, which cannot improve the performance of automatic driving. The response sensitivity of the sensor makes it impossible to identify and judge environmental factors in time and quickly during automatic driving, and it also brings safety hazards to high-speed automatic driving. At the same time, there may be unknown problems between the sens...

AI Technical Summary

Problems solved by technology

The frequency of each sensor is different, and the internal clock is also different. The current practice is to process the latest data to ensure real-time performance. In this way, the system frequency will depend on the low-frequency sensor, and the high-frequency sensor cannot be fully utilized, which cannot improve the performance of automatic driving. The response sensitivity of the sensor makes it impossible to identify and judge environmental factors in time and quickly during automatic driving, and it also brings safety hazards to high-speed automatic driving

At the same time, there may be unknown problems between the sensors due to the error of the data time stamp, which increases the complexity of data fusion between multiple sensors.

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