Vehicle Data Recorder Failure Cause Determination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional data recorders for vehicles record control data without considering the cause of detected behaviors, leading to unnecessary data storage and resource consumption, especially when the cause can be identified from failure information recorded by the vehicle's failure detection function.
Innovation Solution
A data recorder system that includes a behavior detection device, a record processing device, and a cause determination device, which determines whether a detected behavior is caused by a failure and only records control data if the cause is not identified as a failure, thereby preventing useless data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the data recorder records control data whenever a specific behavior is detected, then the completeness of behavior analysis is improved, but the storage resource consumption increases due to recording useless data from failure causes
Solution Approach 1:
The system performs preliminary determination of whether a detected behavior is caused by a failure before recording control data. The cause determination device checks failure information stored in the non-volatile memory to pre-judge whether the behavior stems from a failure condition, and only records data when the behavior is not caused by a failure, thereby avoiding unnecessary storage consumption.
Solution Approach 2:
The cause determination device acts as an intermediary between the behavior detection device and the record processing device. It receives detection results from the behavior detection device, consults failure information from the non-volatile memory, and provides guidance to the record processing device on whether to record the control data, thus mediating the recording decision to eliminate useless data storage.
2Loss of information
If the data recorder stores all control data at behavior detection, then the availability of data for investigation is improved, but the storage area for useful data decreases due to useless data occupation
Solution Approach 1:
The system extracts and removes useless control data from the recording process by determining beforehand whether the detected behavior is caused by a failure. When a failure is detected, the corresponding control data is excluded from recording, thereby extracting only the useful data that needs to be stored for investigation while eliminating data that would occupy storage space without providing investigative value.
3Measurement precision
If the data recorder dynamically sets detection conditions, then the accuracy of behavior detection is improved, but the device complexity increases due to additional determination logic
Solution Approach 1:
The cause determination device serves multiple functions: it determines whether detected behaviors are caused by failures, consults failure information from the non-volatile memory, and provides recording guidance to the record processing device. This multi-functional approach consolidates determination logic into a single device rather than distributing it across multiple components, thereby managing complexity while maintaining detection accuracy.
Data Source
AI summary
A data recorder mounted to a vehicle is disclosed. When detecting a specific behavior of the vehicle, the data recorder determines whether or not a presently-occurring failure detected by a failure detector of the vehicle is a cause of occurrence of the specific behavior. When the presently-occurring failure is not the cause of occurrence of the specific behavior, the data recorder is permitted to record a control data in a non-volatile data storage device. When the presently-occurring failure is the cause of occurrence of the specific behavior, the record processing device is prohibited from recording the control data in the non-volatile data storage device.