Vehicle Sensor Angle Calibration During Stopped Operation
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Solution Overview
Problem
Existing vehicle sensors often experience deviations from their intended location and angle during normal operation, affecting their performance and accuracy in sensing objects.
Innovation Solution
A sensor calibration system that uses an electronic processor to determine vehicle stoppage, adjust sensor angles based on tolerance ranges, and modify calibration settings to ensure accurate sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is positioned at a specific location and angle during manufacturing, then sensing accuracy is improved, but the sensor angle deviates during normal vehicle operation
Solution Approach 1:
The system performs preliminary calibration of the sensor angle during manufacturing when the vehicle is unloaded, establishing a reference angle. This preliminary action allows the system to later compensate for angle deviations that occur during normal operation by comparing current angles against the pre-established reference.
Solution Approach 2:
The system continuously monitors the sensor angle using a second sensor and compares it against the reference angle. When deviations are detected, the system generates feedback signals to adjust the calibration parameters, creating a closed-loop control system that maintains sensing accuracy despite angle changes during vehicle operation.
2Measurement precision
If the sensor calibration is modified to correct angle deviations, then sensing accuracy is improved, but false positives may occur due to incorrect calibration
Solution Approach 1:
The system applies calibration modifications only partially - only when angle deviations exceed predetermined thresholds. By using tolerance ranges and conditional calibration adjustments, the system avoids excessive calibration changes that could lead to false positives, while still correcting significant angle deviations to maintain sensing accuracy.
3Productivity
If the vehicle is continuously moving, then operational productivity is improved, but sensor calibration accuracy deteriorates
Solution Approach 1:
The system performs calibration adjustments periodically when the vehicle is stopped, rather than continuously. This periodic calibration approach allows the system to maintain high operational productivity during vehicle movement while still correcting sensor angle deviations at appropriate intervals when the vehicle is stationary, ensuring calibration accuracy without compromising operational efficiency.
Data Source
AI summary
A sensor calibration system for a vehicle including a first sensor positioned at a reference angle, the first sensor senses an object, a second sensor disposed within the first sensor, the second sensor senses a first angle of the first sensor, and an electronic processor. The electronic processor receives vehicle movement information, determines, based on the vehicle movement information, whether the vehicle is stopped, and in response to determining that the vehicle is stopped, obtains a first signal indicative of the first angle from the second sensor. The electronic processor also converts the first angle to a second angle, determines whether the second angle is within a tolerance range, in response to determining that the second angle is within the tolerance range, modifies a calibration of the first sensor using the second angle, and senses the object using the modified calibration of the first sensor.