Warehouse Blind Spot Warning System Using Sensor-Activated Visual Alarms
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Solution Overview
Problem
Commercial warehouses face challenges with 'blind' intersections and corners due to densely packed shelving, making it difficult for pedestrians and fork lift drivers to detect cross-flow traffic, exacerbated by high noise levels that render audible sirens ineffective.
Innovation Solution
A traffic signal system using stationary alarm lights combined with sensors that detect objects within a perimeter, flashing yellow or red lights to indicate the presence of pedestrians or fork lifts, and a wireless mobile warning light system that alerts operators of potential hazards through LED lights and transponders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If dense shelving blocks are arranged to maximize storage capacity, then storage efficiency is improved, but visibility at intersections deteriorates creating blind spots
Solution Approach 1:
The system performs preliminary detection of approaching vehicles and pedestrians using sensors positioned at intersections before they enter the blind zone. Warning lights are activated in advance to alert operators of potential collisions, allowing them to take preventive action before entering the hazardous area.
Solution Approach 2:
The patent introduces an intermediary detection and warning system consisting of sensors, controllers, and visual alarm lights positioned at blind intersections. This intermediary system bridges the gap between the dense shelving arrangement and the need for visibility, providing early warning without requiring physical changes to the shelving configuration.
2Ease of operation
If audible sirens are used to warn approaching traffic at blind intersections, then warning capability is improved, but effectiveness deteriorates due to high noise levels and reverberation
Solution Approach 1:
The patent replaces the acoustic warning system (sirens) with an optical warning system (visual alarm lights). This substitution eliminates the problems associated with sound propagation in noisy warehouse environments, including reverberation and masking by ambient noise, providing clear and reliable visual warnings that are not affected by acoustic conditions.
Solution Approach 2:
The system uses color-changing visual alarm lights that can display different colors (e.g., yellow for caution, red for stop) to convey different warning levels and states. This color-coding system provides intuitive and immediate information to operators about the presence and type of potential hazards at blind intersections.
3Reliability
If stationary alarm lights with sensors are deployed at blind intersections, then collision warning effectiveness is improved, but system complexity increases
Solution Approach 1:
The patent divides the warning system into separate modular units, each comprising a sensor array, controller, and visual alarm light assembly positioned at specific blind intersections. This segmentation allows for localized deployment and operation of warning systems only where needed, rather than requiring a comprehensive system throughout the entire warehouse, thereby managing complexity while maintaining effectiveness.
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
The system effectively warns operators of approaching traffic and hazards, reducing the risk of collisions by providing clear visual warnings that are not masked by ambient noise, enhancing safety in high-risk areas like intersections and corners.
Implementation Method 1
a sensor and alarm light combination mounted on a fork lift will give the driver indications of pedestrians, or other fork lifts, or else other matters like overhead hazards
Implementation Method 2
A traffic signal system using stationary alarm lights combined with sensors that detect objects within a perimeter, flashing yellow or red lights to indicate the presence of pedestrians or fork lifts
Data Source
AI summary
A traffic signal system for congested trafficways has a plurality of stationary alarm light/sensor-reader combinations and mobile alarm light/sensor-reader combinations monitoring each other and monitory tags placed on individuals, machines, and hazards to provide real time alarms to not only pedestrians but also machine operators, who are potentially approaching harm's way, or have the better ability to avert potential harm. Different forms of alarms are provided to indicate different kinds of alarm conditions and to reduce complacency to alarms, and thus improve effectiveness.