Ceiling Vehicle Obstacle Detection to Avoid Preceding Vehicle Reflections
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Solution Overview
Problem
Existing ceiling traveling vehicle systems face issues with false obstacle detection due to detection light reflecting off preceding vehicles, leading to unnecessary interference and reduced operational efficiency.
Innovation Solution
The system employs a detector configuration with two sensors positioned 45 degrees relative to the travel direction, scanning detection light in a 90-degree range, and switching between sensors based on travel direction to prevent false detection of preceding vehicles while ensuring obstacle detection, using a grid-shaped track to adjust detection ranges accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the obstacle sensor applies detection light forward in the traveling direction, then obstacle detection capability is improved, but false detection of preceding vehicles increases due to light reflection
Solution Approach 1:
The detector is positioned asymmetrically on the rear side of the center of the main body, not at the front center. This asymmetric placement combined with downward inclination directs detection light forward and downward, creating an angular detection pattern that avoids reflecting off preceding vehicles while maintaining obstacle detection capability
Solution Approach 2:
The detection light is directed not only forward but also downward at an inclined angle. This adds a vertical dimension to the detection pattern, causing the light to pass below preceding vehicles rather than reflecting off them, thereby eliminating false detection while maintaining obstacle detection effectiveness
2Device complexity
If the detector is positioned on the front side of the main body, then obstacle detection is simplified, but interference with preceding vehicles occurs through detection light reflection
Solution Approach 1:
Instead of positioning the detector at the front center (symmetric position), the detector is placed asymmetrically on the rear side of the center. This asymmetric positioning fundamentally changes the detection light trajectory to avoid interference with preceding vehicles
Solution Approach 2:
The detector applies light at an inclined downward angle rather than horizontally forward. This introduces a vertical component to the detection beam, causing it to pass below preceding vehicles and eliminate reflective interference
3Area of stationary object
If detection light is applied horizontally forward, then detection range is maximized, but false detection of preceding vehicles occurs
Solution Approach 1:
The detection light is directed forward and downward at an incline rather than purely horizontally. This three-dimensional detection pattern maintains adequate detection range while eliminating false detection by passing below preceding vehicles
Solution Approach 2:
The detection light is concentrated in a specific angular direction (forward and downward incline) rather than uniformly in all forward directions. This localized detection quality ensures precise obstacle detection while avoiding areas where preceding vehicles would cause false detection
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
This configuration effectively prevents false detection of preceding vehicles as obstacles, enhancing operational efficiency by reducing unnecessary stops and improving detection accuracy, especially in scenarios where vehicles are close or traveling on intersecting tracks.
Implementation Method 1
apply detection light forward in the traveling direction and downward and to detect an obstacle by receiving reflected light of the detection light
Data Source
AI summary
A ceiling traveling vehicle includes a traveler to travel along a grid-shaped track, a main body coupled to the traveler and below the track, and a detector on a rear side of a center of the main body in a traveling direction of the traveler and below the main body to apply detection light forward in the traveling direction and downward and receive reflected light of the detection light to detect an obstacle.