Weight-Activated Crosswalk Lighting for Reliable Pedestrian Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing crosswalk lighting systems rely on pedestrian action or complex sensors for activating alert lights, which can be unreliable and may not ensure driver awareness of pedestrians entering or crossing, especially at night.
Innovation Solution
A weight-activated crosswalk lighting system with mats embedded in the sidewalk that activate alert lights when a pedestrian steps on them, using a solar-powered circuit and wireless connectivity, eliminating the need for manual activation or complex sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a push button switch is used for activation, then the system requires pedestrian action to activate, but this reduces reliability as pedestrians may not notice or remember to press the button
Solution Approach 1:
The system uses a weight-activated switch that automatically detects when a pedestrian steps on the mat, eliminating the need for the pedestrian to manually press a button. The system serves itself by using the pedestrian's own weight as the activation mechanism, thereby improving reliability without requiring conscious pedestrian action.
Solution Approach 2:
The invention replaces the manual push button mechanical system with a weight-activated switch that uses the mechanical force of a pedestrian's weight to close the circuit and activate the alert lights, making the system more reliable and easier to operate.
2Extent of automation
If radar or infrared detectors are used for activation, then automatic detection is achieved, but the system becomes more expensive and less reliable
Solution Approach 1:
The invention uses a simple, inexpensive weight-activated switch instead of expensive radar or infrared detectors. While the detectors provide automatic detection, the weight-activated switch achieves the same function with much lower cost and higher reliability by using a straightforward mechanical switching mechanism that is less prone to failure.
Solution Approach 2:
Instead of using complex sensing technologies like radar or infrared detectors, the system uses a simple mechanical copy of the activation concept - a weight-activated switch that directly translates pedestrian weight into circuit closure, providing a more reliable and cost-effective solution.
3Measurement precision
If complex sensors are used for activation, then detection accuracy improves, but the system complexity and cost increase
Solution Approach 1:
The invention applies the quality of simplicity to the activation mechanism by using a localized weight-activated switch at the crosswalk entrance. This simple mechanical switch provides sufficient detection accuracy for its specific purpose without the complexity of sophisticated sensors, achieving the right level of precision for the application.
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 provides reliable and automatic activation of alert lights, enhancing pedestrian safety by ensuring drivers are alerted without relying on pedestrian action or complex sensors, and is durable, easy to maintain, and cost-effective.
Implementation Method 1
The power source preferably is, or includes, a solar panel mounted to the top of each system post and oriented to gather sunlight.
Implementation Method 2
downward pressure on the top contact sheet compresses the compressible sheet until the at least one top contact and the at least one bottom contact touch each other through the contact opening and thereby close the switch and circuit within the system mat
Data Source
AI summary
A crosswalk lighting system for alerting drivers that a person is entering or crossing at a crosswalk includes a road marked with a crosswalk; at least one alert light mounted one of on and adjacent to the crosswalk; a system power source; a system circuit connected to the system power source and to the at least one alert light; and a system mat containing a weight-activated switch and mounted adjacent to the road at a first end of the crosswalk for activation in response to the weight of a pedestrian stepping on a system mat as the pedestrian approaches the entrance of the crosswalk.