In-Vehicle Data Selection for Low-Capacity Accident Analysis
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Solution Overview
Problem
Existing data collection methods in vehicles are limited by high data capacity and processing load, particularly when collecting data from driving assistance systems and sensors like cameras and LIDAR, and do not adequately address the need for data beyond video for accident analysis.
Innovation Solution
An in-vehicle device that selects and outputs data records based on vehicle and surrounding object operations exceeding thresholds, using sensors like steering angle, satellite, and gyro sensors, and compresses data to reduce capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If data from multiple sensors (camera, LIDAR, steering angle, acceleration, etc.) is collected at high sampling periods for accident analysis, then the completeness and accuracy of accident situation analysis is improved, but the data capacity and processing load increase significantly
Solution Approach 1:
The patent extracts and transmits only the essential data elements needed for accident analysis from the large volume of sensor data. The transmission control unit selectively transmits data items such as vehicle position information, image data, LIDAR data, and sensor readings when accidents or emergency braking operations are detected, rather than transmitting all collected data continuously.
Solution Approach 2:
The patent changes the sampling period parameter dynamically based on the driving situation. During normal driving, data is collected at a lower sampling period to reduce data capacity. When accidents or emergency braking operations are detected, the sampling period is increased to capture detailed accident situation data, thus maintaining analysis accuracy while reducing overall data capacity.
2Loss of information
If all sensor data is transmitted continuously to external servers for analysis, then the availability of complete data for analysis is improved, but the communication load and transmission time increase
Solution Approach 1:
The patent performs preliminary selection and filtering of data before transmission. The transmission control unit determines in advance which data items need to be transmitted based on detected accident situations or emergency braking operations, and prepares the essential data for transmission, thus reducing the actual transmission time and communication load.
Solution Approach 2:
The patent transmits only the necessary portion of data required for accident analysis rather than all collected data. The transmission control unit selectively transmits specific data items (vehicle position, image data, LIDAR data, sensor readings) when accidents are detected, implementing partial transmission that reduces communication load while maintaining data completeness for analysis purposes.
3Adaptability or versatility
If data collection includes not only video but also sensor data (steering angle, acceleration, brake pressure) to meet vehicle safety standards, then the compliance with accident analysis guidelines is improved, but the device complexity and data processing requirements increase
Solution Approach 1:
The transmission control unit serves multiple functions: it monitors various sensor inputs (steering angle, acceleration, brake pressure), detects different accident scenarios (accidents, emergency braking operations), and controls transmission of diverse data types (vehicle position, image data, LIDAR data, sensor readings). This multi-functional approach consolidates complexity into a single control unit while ensuring compliance with vehicle safety standards.
Data Source
AI summary
An object of the present invention is to provide a technique for suppressing a data capacity by appropriately selecting a data item that needs to be collected in order to analyze an accident situation or the like. An in-vehicle device according to the present invention acquires data describing a state of a vehicle and a surrounding situation of the vehicle, and selects and outputs a record in which at least one of an operation of the vehicle or an operation of a surrounding object exceeds a threshold among records described in the data (see FIG. 1).