Adaptive Traffic Signal Control via Wireless Sensor Detection
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Solution Overview
Problem
Existing traffic control systems cannot accurately determine pedestrian presence, leading to potential safety hazards for slower pedestrians, such as children and the elderly, as they may exceed fixed passing times or misjudge traffic signal changes.
Innovation Solution
A traffic control system utilizing wireless sensor nodes on both sides of a road to detect the strength of a sensor terminal's wireless signal and adjust traffic signal lamps accordingly, ensuring safe passage by controlling the duration and status of the signals based on the detected changes in signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed pedestrian passing time is set in the traffic control system, then the system operation is simple, but slower pedestrians (elderly, children, persons with poor self-control) may exceed the preset time and be trapped in the middle of the road when traffic signals change
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed, static pedestrian passing time to a dynamic, adaptive passing time. The system continuously monitors pedestrian detection signals from wireless sensor nodes and automatically adjusts the green light duration based on real-time pedestrian presence and movement patterns. This dynamic adjustment ensures the passing time adapts to different pedestrian speeds and conditions, preventing slower pedestrians from being trapped while maintaining simple system operation through automated control.
2Reliability
If wireless sensor nodes are deployed to detect pedestrian presence and adjust traffic signals dynamically, then pedestrian safety is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical or manual pedestrian detection systems with wireless sensor nodes that use electromagnetic fields for detection. Instead of mechanical pressure sensors or complex optical systems, the invention employs wireless sensors that detect pedestrians through signal strength variations, simplifying the physical infrastructure while improving safety through automated, real-time monitoring and dynamic traffic signal adjustment.
3Adaptability or versatility
If the traffic signal control is adjusted automatically based on real-time pedestrian detection, then the adaptability to different pedestrian conditions is improved, but the difficulty of detecting and measuring pedestrian presence increases
Solution Approach 1:
The patent introduces wireless sensor nodes as intermediary devices between pedestrians and the traffic control system. These sensor nodes act as mediators that detect pedestrian presence through wireless signal interactions without requiring direct physical contact or complex optical recognition. The sensors measure signal strength variations caused by pedestrian proximity and movement, translating these physical phenomena into detectable electrical signals that the control system can process to automatically adjust traffic signals according to real-time pedestrian conditions.
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 automatically determines pedestrian passage status and adjusts traffic signal lamps to ensure safe passage, effectively improving road safety by adapting to the presence and movement of pedestrians.
Implementation Method 1
wireless sensor nodes respectively on both sides of a road, configured to determine the strengths of a wireless signal transmitted from a sensor terminal
Data Source
AI summary
A system and a method for controlling traffic, the method comprising: when a sensing terminal sends a wireless signal, the intensity of the wireless signal sent by the sensing terminal is determined by wireless sensor nodes (101) located on both sides of a road, and the determined intensity is passed to an information processing module (102); the information processing module (102); the information processing module (102) controls the state of a traffic light according to the change in the intensity determined by the wireless sensor nodes (101). By means of the present application, the state of pedestrians crossing the road can be automatically determined, and the traffic light can be automatically adjusted, so as to ensure the safety of pedestrians effectively.