Overlapping Camera Synchronization for Vehicle Object Recognition
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Solution Overview
Problem
Existing external environment recognition systems for autonomous mobile objects waste processing resources by performing synchronous processing periodically, even when synchronization is not necessary, and require complex correction processing, especially with increased camera installations and frame rates.
Innovation Solution
An external environment recognition device that performs synchronous processing only when positional deviations occur between overlapping camera regions, allowing for reduced processing load and resource conservation by synchronizing signals at the stage of signal output from recognition sensors, and includes an abnormality notification system for displaced sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronous processing is performed periodically by cameras using a synchronizing signal, then synchronization between cameras is maintained, but processing resources are wasted when synchronization is not necessary
Solution Approach 1:
The patent transitions from static periodic synchronization to dynamic event-driven synchronization. The system continuously monitors imaging timing information and dynamically activates synchronous processing only when timing deviations exceed a threshold, making the synchronization mechanism adaptive to actual system conditions rather than operating continuously at fixed intervals
Solution Approach 2:
The system performs self-diagnosis by automatically detecting timing deviations between cameras through monitoring imaging timing information. When deviations are detected, the system autonomously triggers synchronous processing without external intervention, and returns to normal operation when deviations are corrected, enabling the system to self-regulate synchronization needs
2Measurement precision
If correction processing is performed by the image processing device to align imaging timings, then positional accuracy of identical objects is improved, but processing load increases
Solution Approach 1:
The patent performs preliminary detection of timing deviations by monitoring imaging timing information before correction processing is needed. By detecting deviations early and triggering synchronization only when necessary, the system avoids the continuous processing load of correction while maintaining positional accuracy when deviations occur
Solution Approach 2:
The invention extracts and monitors specific timing information from camera operations separately from the main image processing workflow. By isolating the timing detection function and using it to trigger correction only when needed, the system removes unnecessary processing load from the image processing device while preserving correction capabilities when required
Data Source
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AI summary
An external environment recognition device includes: a plurality of external environment recognition sensors (20) each having an information detection unit (20a) that detects information of an object outside a vehicle, the plurality of external environment recognition sensors (20) being arranged such that a detection range of the information detection unit (20a) includes an overlapping region (RF) where at least part of the detection range of the information detection unit (20a) overlaps with at least part of the detection range of another one of the information detection units (20a); and a synchronous processing unit that extracts identical objects in the overlapping region (RF) from detection results of the external environment recognition sensors (20), and performs synchronous processing to synchronize the plurality of external environment recognition sensors(20) if there is a deviation in position between the identical objects in the overlapping region (RF).