Acceleration Sensor Offset Error Correction via Vehicle State Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional acceleration/deceleration detection systems face challenges in accurately determining offset errors due to deceleration components from engine brakes and require driver-specific operations, leading to potential detection errors and inaccuracies over time.
Innovation Solution
An acceleration/deceleration detecting system that includes a detector, a device for accelerating or decelerating a measurement object, and a calculation device to set and correct detection values based on actual acceleration/deceleration directions, determining and correcting offset errors by comparing detected values with actual directions during stable vehicle operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the offset error is determined using the detection value when the driving/braking force is substantially 0, then the offset error calculation is simplified, but the calculation accuracy is lowered due to deceleration components from engine brake
Solution Approach 1:
The system performs preliminary identification of acceleration/deceleration states using operation state information (accelerator pedal position, brake pedal position) before determining offset error. This allows the system to select appropriate timing for offset error determination, avoiding periods when engine brake or other interfering forces are acting on the vehicle, thereby improving calculation accuracy while maintaining ease of implementation through predefined operational criteria
2Measurement precision
If the driver is forced to perform specific operations to determine the offset error, then the offset error can be determined, but the ease of operation is reduced and detection errors may occur due to driver inconsistency
Solution Approach 1:
The system automatically determines offset error by monitoring operation state information (accelerator pedal position, brake pedal position, vehicle speed) and acceleration sensor output without requiring any specific driver actions. The calculation device autonomously identifies appropriate timing based on predefined criteria and performs offset error determination, eliminating the need for driver participation while improving consistency and accuracy through automated, repeatable measurement conditions
3Device complexity
If the offset error is determined without considering vehicle operation state, then the determination process is simpler, but detection errors occur due to engine brake and other interfering forces
Solution Approach 1:
The system performs preliminary assessment of vehicle operation state using readily available information (accelerator pedal position, brake pedal position, vehicle speed) before determining offset error. This preliminary action identifies timing when interfering forces are minimal, allowing accurate offset error determination without adding significant complexity to the overall system
Solution Approach 2:
The calculation device continuously monitors operation state information and acceleration sensor output, using feedback from these sources to determine when appropriate conditions for offset error measurement are met. This feedback mechanism ensures that offset error is determined only when vehicle state is suitable, improving accuracy while maintaining manageable system complexity through rule-based decision logic
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
An acceleration/deceleration detecting system includes an acceleration/deceleration detector (10) configured to be disposed in a measurement object and detect acceleration/deceleration of the measurement object, an acceleration/deceleration device (20) configured to accelerate or decelerate the measurement object, and a calculation device (30) configured to determine that a detection value of the acceleration/deceleration detector (10) is an offset error or a detection error of the acceleration/deceleration detector (10), when an actual acceleration/deceleration direction of the measurement object is different from an acceleration/deceleration direction shown by a detection value of the acceleration/deceleration detector (10) in a state that the measurement object is accelerated or decelerated by the acceleration/deceleration device (20).