A vehicle event data recording method and device

Abstract

The invention discloses a method and device for recording vehicle event data, comprising: acquiring target data information around the vehicle and data information of the vehicle; judging whether to generate a collision warning signal based on at least the target data information around the vehicle and the data information of the vehicle; When there is a collision warning signal, start the event data recording, record the data cache before the collision warning signal is issued, and obtain and record the target data information around the vehicle and the data information of the vehicle; at least based on the data information of the vehicle, determine whether a collision occurs; if determined When a collision occurs, record the time of the collision, acquire and record the target data information around the vehicle and the vehicle data information related to the collision event, and acquire and record the status information of the power supply and backup power supply used for event data recording. The invention detects the occurrence of the collision in advance, activates the event data record by using the collision warning signal, starts recording and storage before the event occurs, and can reduce or avoid the loss of the event data record.

Description

technical field [0001] The invention relates to the field of vehicle safety, in particular to a method and device for recording vehicle event data. Background technique [0002] A vehicle's Event Data Recording Device (EDR), sometimes referred to as the vehicle's "black box," is a device installed in a vehicle to record crash-related information. A device used to record vehicle and occupant information for a very short time (only seconds) before, during and after an accident, recording information related to an "event", for example, if an "event" is defined as a vehicle collision, a pre-crash is recorded Information such as vehicle dynamics, system status, driver input, crash sensor data, restraint system usage / deployment status, and collision notifications. [0003] Currently, the EDR of most vehicles is part of the restraint system control module, which senses crash acceleration and determines what restraints to deploy (airbags and / or seat belt tensioners). Usually the v...

AI Technical Summary

Problems solved by technology

Usually, the vehicle event recording system starts to record data after the physical collision of the vehicle, but when the event occurs, the EDR power may be cut off due to the damage of the vehicle hardware. In this case, the electric energy in the capacitor of the restraint system control module Reserves are able to continue powering the EDR

However, this power is not enough to provide enough time to complete the writing of the event data for a few seconds before the collision and after the collision

[0004] In addition, the above-mentioned power reserves may also be depleted due to deployment of restraint devices (airbags and or seat belt tensioners), resulting in insufficient power to write data to storage, resulting in a large number of missing or unrecorded event data

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