Recently, the National Intellectual Property Administration formally granted an important invention patent to Duolun Technology Co., Ltd. and Duolun Information Technology Co., Ltd. – "Method for Calculating Saturation of Road Intersection Inbound Directions and Electronic Device." This patent marks a new level of technical strength for the company in the field of smart transportation perception and control. 

I. Technical Background: Urban Congestion – How to Diagnose It Scientifically?

Traffic congestion is a widespread challenge in modern urban governance. Intersections, serving as the "throat" of urban road networks, directly impact overall traffic efficiency. Traditional methods for calculating intersection saturation rely on manually set capacity parameters, which are complex, lack real-time capability, and suffer from low accuracy.

The invention patent granted to Duolun Technology aims to provide real-time and precise calculation of inbound direction saturation at intersections through intelligent, automated means, offering reliable data support for signal optimization and congestion management.

II. Technical Highlights: Data-Driven "Automated Diagnosis"

This patent proposes a complete saturation calculation system, with core steps including:

• Real-Time Data Collection: Automatically obtains vehicle counts and speeds at the stop line via vehicle detectors (e.g., radar, video devices); simultaneously acquires real-time traffic light status from signal controllers or light-drive circuits.

• Dynamic Speed Analysis: During green and yellow lights, the system automatically records vehicle passage speeds, filters abnormal data, calculates average speeds, and continuously iteratively updates the "historical maximum average speed" to accurately reflect the road's free-flow potential.

• Automatic Saturation Calculation: Based on the historical maximum speed and the free-flow headway at the intersection, derives the lane's saturation flow rate (i.e., capacity). Combined with the actual number of vehicles passing during the green light, it ultimately calculates the inbound direction saturation in real-time.

III. Innovative Value: From "Experience-Based Judgment" to "Data-Driven Decisions"

• Real-Time Precision: Eliminates reliance on manual experience, enabling automated, high-frequency saturation calculation.

• Strong Implementability: Only requires interfacing with common vehicle detectors and signal controllers, no complex deployment or parameter calibration needed.

• Supports Intelligent Decision-Making: Can provide real-time input for systems like adaptive signal control, green wave coordination, and congestion warning, promoting intersections' evolution from "fixed timing" to "dynamic optimization."

IV. Application Prospects: Empowering Traffic Management and Optimization

This technology can be widely applied in:

• Urban traffic signal optimization evaluation systems

• Intersection adaptive control and timing optimization

• Real-time traffic status monitoring and congestion analysis

• Traffic planning and management decision support systems

This patent grant not only reflects Duolun Technology's R&D strength but also signifies its ongoing commitment and contribution to advancing the smart transportation industry. Moving forward, the company will continue to be driven by innovation, helping to make urban transportation safer, more efficient, and smarter.