Vehicle Sensor Fusion Control for Reference Value Selection
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Solution Overview
Problem
Existing vehicle control systems face challenges in determining appropriate correction methods for sensor detection values, leading to potential inaccuracies and safety issues due to varying sensor accuracy, particularly in adaptive cruise control and emergency brake systems.
Innovation Solution
A control device and non-transitory computer-readable recording medium that determine a reference value based on detection values from multiple sensors, using threshold comparisons and specific determination methods to ensure safety and comfort, regardless of sensor accuracy deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensors are used to detect the same detection target, then reliability of detection is improved, but device complexity increases
Solution Approach 1:
The patent segments the sensor system into multiple independent detection units, each detecting the same target independently. The control device then processes these segmented detection values separately before integration, allowing for individual validation and error handling of each sensor channel while maintaining overall system reliability.
Solution Approach 2:
The patent merges multiple detection values from different sensors through a unified control device that applies consistent processing rules. By combining redundant detection channels and processing them through the same reference value determination logic, the system achieves improved reliability without proportionally increasing complexity.
2Measurement precision
If detection values from multiple sensors are compared and processed, then measurement precision is improved, but processing complexity increases
Solution Approach 1:
The control device performs preliminary comparison of detection values against predetermined thresholds before final reference value determination. This preliminary action filters out obviously erroneous readings early in the processing chain, reducing the computational burden of subsequent precision processing while maintaining measurement accuracy.
Solution Approach 2:
The patent implements dynamic processing where the method for determining the reference value changes based on the detection scenario. The control device adaptively selects between different processing approaches (simple threshold comparison vs. complex multi-criteria evaluation) depending on the specific control situation, optimizing the balance between precision and processing complexity.
3Ease of operation
If a predetermined threshold value is used to compare detection values, then ease of operation is improved, but measurement precision may deteriorate
Solution Approach 1:
The control device dynamically adjusts the processing approach based on the magnitude of differences between detection values. When differences are small, simple threshold-based selection is used for ease of operation. When differences exceed the threshold, more sophisticated processing methods are activated to maintain precision, creating a dynamic system that adapts to the data quality.
Solution Approach 2:
The predetermined threshold value acts as an intermediary parameter that bridges simple comparison operations and complex precision processing. Rather than directly comparing all detection values with high computational effort, the threshold serves as a first-level filter that routes processing to appropriate complexity levels, maintaining both operational simplicity and measurement precision.
Data Source
AI summary
A control device to be applied to a vehicle includes one or more processors and one or more memories. The one or more processors acquire detection values by respective sensors. The sensors detect the same detection target including a distance to a target, a speed of the vehicle, or both. The one or more processors determine whether or not the detection values by the sensors differ by a predetermined threshold value or more. The one or more processors determine a reference value based on the detection values by the sensors, by a determination method set in accordance with a control using data regarding the detection target, when the detection values by the sensors differ by the predetermined threshold value or more. The one or more processors carry out the control based on the reference value.