Vehicle Laser Radar Filtering for Splash False Detection
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Solution Overview
Problem
Laser radar devices on vehicles erroneously detect road splashes as objects due to their transient nature on wet roads, leading to incorrect target identification.
Innovation Solution
A detection device that specifies a detection continuation time period and outputs presence information only if the detected object is tracked for longer than a predetermined time, considering distance, relative velocity, and rainfall conditions, and uses multiple detection methods to verify object identity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a laser radar device continuously detects objects around a vehicle, then detection coverage is improved, but false detection of splashes increases
Solution Approach 1:
The patent applies dynamics by making the detection system adaptive through continuous monitoring of detection history and temporal patterns. The system dynamically adjusts its filtering behavior based on the duration and continuity of detections, transitioning between sensitive and selective states to match environmental conditions
Solution Approach 2:
The patent implements feedback by using detection history and temporal information to continuously refine detection decisions. The system feeds back detection results and temporal patterns to the detection algorithm, allowing it to learn from past detections and adjust current detection thresholds to reduce false positives
2Speed
If the detection device uses a short detection continuation time period threshold, then responsive detection is improved, but false positives from transient splashes increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the detection continuation time period threshold based on environmental conditions and detection patterns. Rather than using a fixed threshold, the system modifies this parameter adaptively to balance responsiveness and accuracy according to current operating conditions
3Quantity of substance
If the detection device outputs presence information for all detected objects, then detection completeness is improved, but false alarm rate increases
Solution Approach 1:
The patent extracts and removes false positive detections from the detection output by applying temporal filtering and pattern recognition. It separates genuine objects from transient splashes by analyzing detection continuity and temporal characteristics, outputting only validated detections
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents erroneous detection of splashes by ensuring only persistent objects are identified, reducing false positives and improving accuracy in object detection around vehicles.
Implementation Method 1
a laser radar device mounted on the vehicle is disclosed
Data Source
AI summary
A detection device 1 is provided with: a detection unit 121 which detects an object present around a vehicle V; a specification unit 122 which specifies a detection continuation time period in which the detection unit 121 has continuously detected the object; and an information output unit 123 which, on the condition that the detection continuation time period specified by the specification unit 122 has exceeded a determination time period for determining whether or not the object is a detection target object, outputs presence information indicating detection of the target object by the detection unit 121.