Collision Mode Prediction for Single-Sensor Airbag Deployment
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Solution Overview
Problem
Existing collision mode determination systems require multiple acceleration sensors to differentiate between symmetrical and asymmetrical collisions, increasing costs and complexity.
Innovation Solution
A collision mode prediction device using one acceleration sensor in the central front portion of a vehicle, combined with GNSS and inter-vehicle communication, predicts collision modes based on positional information of the own and other vehicles to control airbag deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple acceleration sensors are used to determine collision mode, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary system consisting of external sensors (cameras, radar, LIDAR) and communication devices that mediate between the vehicle and its environment. These external sensors detect positional information of other vehicles and obstacles, which is then processed by the control device to predict collision modes. This intermediary approach allows the system to achieve accurate collision mode determination without relying solely on multiple internal acceleration sensors.
Solution Approach 2:
The patent implements preliminary action by predicting collision modes before actual collision occurs. The control device acquires positional information of other vehicles in advance, predicts potential collision modes based on this information, and prepares appropriate airbag deployment strategies beforehand. This predictive approach enables the system to use a single acceleration sensor effectively, as the collision mode is already determined through prior positional analysis rather than requiring multiple sensors to analyze collision dynamics in real-time.
2Device complexity
If one acceleration sensor is used to reduce cost, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent applies universality by making the single acceleration sensor perform multiple functions. Rather than using multiple specialized sensors for different collision scenarios, the system uses one multi-functional acceleration sensor combined with external positional information. The control device processes both the acceleration data and external sensor data together to determine collision modes, allowing the single sensor to contribute to multiple aspects of collision detection and analysis.
Solution Approach 2:
The patent replaces the mechanical approach of using multiple physical acceleration sensors with a hybrid system that substitutes some mechanical sensing with external optical and electromagnetic sensors (cameras, radar, LIDAR). The positional information obtained through these non-mechanical means compensates for the reduced mechanical sensing capability, enabling accurate collision mode determination with fewer physical acceleration sensors.
3Measurement precision
If external sensors and communication devices are added, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple detection functions into a unified system. The control device integrates data from acceleration sensors, external sensors (cameras, radar, LIDAR), and communication devices into a single coordinated system. By combining these previously separate functions into one integrated control device, the system achieves improved measurement precision while managing complexity through consolidation rather than proliferation of independent components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces sensor costs by using one acceleration sensor while accurately predicting collision modes, ensuring appropriate airbag deployment based on symmetrical or asymmetrical collisions.
Implementation Method 1
an acceleration sensor that is installed in a middle portion of a front portion of the own vehicle
Data Source
AI summary
In the collision mode prediction device, the first acquisition unit acquires position information of the own vehicle. The second acquisition unit acquires position information of another vehicle. When there is a possibility of a collision between the own vehicle and another vehicle, the prediction unit predicts a collision mode between the own vehicle and the other vehicle on the basis of the position information of the own vehicle and the position information of the other vehicle.