Vehicle Controller Cabin Sensor Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
When an acceleration sensor is mounted in a movable vehicle cabin, such as a heavy truck, it can output erroneous values due to inclination changes during opening and closing, leading to incorrect vehicle control and potential abnormality detection errors.
Innovation Solution
A vehicle controller with an open/closed state detection unit and a correction unit that adjusts the sensor output values when the cabin is opened and closed, preventing erroneous abnormality detection and optimizing control by using a held operational sensor output value before the cabin is opened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the acceleration sensor is mounted in the movable cabin, then the sensor is protected from water, mud, and flying stones, but the sensor output becomes erroneous when the cabin is opened and inclined
Solution Approach 1:
The system dynamically changes the correction parameter (correction value) based on the cabin's open/closed state. When the cabin is closed, a first correction value is applied; when opened, a second correction value is applied. This parameter change compensates for the inclination-induced measurement errors while maintaining the protective mounting environment.
2Measurement precision
If correction is constantly performed during cabin movement, then sensor accuracy is maintained, but control load increases unnecessarily
Solution Approach 1:
Correction is performed periodically based on the cabin's state transitions rather than continuously. The correction unit applies correction values at specific periods: when the cabin transitions from closed to open or from open to closed. This periodic correction approach maintains accuracy while minimizing unnecessary computational operations during stable states.
Solution Approach 2:
The correction unit automatically selects and applies appropriate correction values based on the detected cabin state without requiring external intervention. The system self-regulates by using the open/closed state detection to trigger corresponding correction actions, reducing the need for continuous monitoring and manual adjustment.
3Device complexity
If the same correction value is used before and after cabin opening, then control simplicity is maintained, but accurate control cannot be performed due to inclination changes
Solution Approach 1:
The correction value transitions from static to dynamic based on cabin state. Instead of using a fixed correction value, the system employs multiple correction values (first correction value for closed state, second correction value for open state) that are dynamically selected based on the cabin's open/closed detection. This dynamic approach maintains simplicity in implementation while achieving accuracy through state-dependent correction.
Data Source
AI summary
A vehicle controller which can perform appropriate control even when an acceleration sensor is mounted in a movable portion of a vehicle. The vehicle controller includes an acceleration sensor attached to a cabin movable around a shaft, an open/closed state detection section which detects the open/closed state of the cabin, and a correction section which corrects the output value of the acceleration sensor. When the open/closed state detection section detects that the cabin is opened and then closed, the correction section performs correction. When the acceleration sensor is provided in the cabin serving as a movable portion, the inclination of the acceleration sensor may differ slightly before and after the cabin is opened.