Passive Infrared Traffic Sensing for Rural Road Safety
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current traffic sensing technologies, particularly in rural areas, face challenges due to high installation and maintenance costs, short lifespans, and high power consumption, making them unsuitable for rural environments, which are critical for improving road safety with the advent of autonomous vehicles and V2I communications.
Innovation Solution
A passive infrared sensing system using a multiple-pixel infrared array sensor with a computing device and data store, capable of detecting vehicle parameters like velocity, length, height, and classification based on thermal emissions, installed off-pavement on existing infrastructure, reducing costs and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If on-roadway detection systems (magnetic loop, magnetometers, inductive loops, pneumatic road tubes, piezoelectric sensors) are used, then detection accuracy is improved, but installation cost, maintenance cost, and device lifetime are worsened
Solution Approach 1:
The patent replaces mechanical contact-based detection systems (magnetic loops, inductive loops, pneumatic tubes, piezoelectric sensors embedded in road) with passive infrared sensing that detects vehicles through thermal radiation without physical contact. This substitution eliminates the need for road excavation, wiring, and physical sensor installation, thereby reducing installation cost while maintaining detection accuracy.
Solution Approach 2:
The patent introduces passive infrared sensors as an intermediary detection method that captures thermal radiation from vehicles without requiring direct contact or road modification. This intermediary approach allows accurate vehicle detection while avoiding the high installation and maintenance costs associated with embedded mechanical systems.
2Measurement precision
If on-roadway detection systems are used, then detection accuracy is improved, but maintenance cost and device lifetime are worsened
Solution Approach 1:
By replacing mechanical contact systems with passive infrared sensing, the patent eliminates wear and tear from physical contact, removing the need for frequent maintenance and repairs. The non-contact nature of infrared detection preserves sensor integrity and extends device lifetime.
Solution Approach 2:
The passive infrared sensor system requires no active power generation or complex mechanical components that need maintenance. The sensors passively detect thermal radiation and the system operates with minimal intervention, reducing maintenance costs and improving ease of repair.
3Measurement precision
If video image processing systems, microwave radar, or infrared sensors are used, then detection capability is improved, but power consumption and cost are worsened
Solution Approach 1:
The patent uses a reduced array of infrared pixels (fewer than 100 pixels) compared to full video imaging systems, achieving sufficient detection capability for traffic monitoring with significantly lower power consumption. This partial action approach provides adequate detection without the excessive energy requirements of complete video processing systems.
Solution Approach 2:
The patent extracts only the essential detection function from complex video or radar systems by using a simplified infrared pixel array. This extraction removes unnecessary computational and power requirements while retaining core vehicle detection capability, thereby reducing power consumption.
4Measurement precision
If video image processing systems, microwave radar, or infrared sensors are used, then detection capability is improved, but cost is worsened
Solution Approach 1:
The patent employs inexpensive infrared pixel arrays that can be manufactured at low cost compared to video cameras or radar systems. These simplified sensors provide adequate detection capability for rural roadway applications at a fraction of the cost of traditional systems.
Solution Approach 2:
By substituting expensive video image processing systems and microwave radar with passive infrared pixel arrays, the patent achieves significant cost reduction while maintaining essential detection capabilities for traffic monitoring and vehicle parameter estimation.
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 accurate, low-cost, and low-power traffic data collection, enhancing road safety and infrastructure management in rural areas, supporting the integration of autonomous vehicles and V2I communications.
Implementation Method 1
vehicle parameters can be identified based on localized thermal emissions detected by the infrared sensor array
Data Source
AI summary
The present disclosure relates to systems and methods for passive infrared sensing and detection of vehicular traffic. Vehicle parameters are detected using thermal detection states of pixels of an infrared array sensor. The vehicle parameters can include a velocity of a vehicle. A vehicle record that includes the vehicle parameters can be provided, for example, by a computing device in connection with the infrared array sensor.