Mobile Warning Filtering for Fixed Rotor False Alarms
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Solution Overview
Problem
Existing mobile warning systems may erroneously recognize fixed rotors, such as those on outdoor condenser units, as approaching mobile objects, leading to unnecessary warnings.
Innovation Solution
A mobile warning apparatus that calculates relative velocities and determines the proximity of observed points to eliminate those from fixed rotors, thereby reducing false warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the warning system monitors all observed points with relative velocity, then mobile objects can be detected, but fixed rotors cause false warnings
Solution Approach 1:
The system segments the observed points into two distinct groups: mobile objects and fixed rotors. This is achieved by analyzing the spatial distribution and velocity characteristics of observed points, separating those that belong to stationary rotating structures from those that are actually moving towards the vehicle.
Solution Approach 2:
Instead of assuming all points with relative velocity are mobile objects, the system inverts the approach by first identifying characteristics of fixed rotors (points clustered around stationary positions with consistent rotational velocity patterns) and eliminating them from warning targets. This reversal of the detection logic effectively reduces false warnings.
2Object-generated harmful factors
If the system eliminates points based on proximity, then false warnings from fixed rotors are reduced, but detection of nearby mobile objects may be affected
Solution Approach 1:
The system applies different evaluation criteria to different spatial regions. For points in the proximity extent (within a predetermined distance from the vehicle), the system checks whether they belong to fixed rotors using specific velocity and position relationships. For points outside this extent, standard mobile object detection applies. This localized quality control ensures accurate differentiation.
Solution Approach 2:
The system introduces an intermediary classification step between raw observation and warning generation. The eliminator acts as a mediator that uses velocity calculator and position determiner data to identify and remove fixed rotor points before the final warning decision, preventing false warnings while preserving genuine mobile object detection.
Data Source
AI summary
A mobile warning apparatus according to one aspect of the present disclosure includes a velocity calculator, a position determiner, and an eliminator. The velocity calculator calculates one or more relative velocities of one or more observed points. The position determiner determines whether the observed points are in a predetermined proximity extent. The eliminator eliminates, in response to determination that the observed points are in the predetermined proximity extent, all the observed points from a warning target.