Glass Fiber Film Covered Flat Aluminium Wire
Flat Fiber glass wrapped aluminium wire for winding machine
Copper or Aluminum rectangular Wire
Narrow side size a : 0.80mm-5.60mm
Broad side size b : 2.00mm-16.00mm
Copper or Aluminum Round Wire
Diameter:φ1.7-φ5.0
If specification is out of range, please
Flat Copper Wire,Glass Fiber Film Covered Flat Aluminium Wire,Flat Aluminium Wire,Glass Film Covered Flat Wire HENAN HUAYANG ELECTRICAL TECHNOLOGY GROUP CO.,LTD , https://www.huaonwire.com
About Glass Fiber Film Covered Flat Aluminium Wire
**1. Introduction**
The increasing number of vehicles on the roads has led to a growing need for more efficient traffic control systems. Traditional traffic lights rely on fixed timing, which is not always suitable for real-time traffic conditions. When no vehicles are present at an intersection, unnecessary waiting times occur, leading to inefficiencies and potential traffic congestion in other directions. To address these issues, intelligent traffic light control systems have been developed. These systems adapt to changing traffic flows, optimizing signal timing based on actual vehicle presence, thereby reducing delays and improving overall traffic flow.
Currently, various methods exist for detecting traffic flow, such as inductive sensors, video monitoring, and pre-set time adjustments. Each approach has its own advantages and limitations. The system described here focuses on vehicle flow as the central element of control. By using ground-sensing coils to detect vehicles, it enables intelligent management of traffic signals at intersections. As cities become more digital, the demand for smart, networked, and data-driven transportation systems continues to grow.
**2. System Structure**
The main controller of the system is based on the Siemens S7-300 series PLC, which provides reliable and flexible control. Traffic flow is detected using ground-sensing coils that operate on electromagnetic induction principles. The system comprises several components: a PLC controller, a signal detection device, a signal conversion unit, an emergency button, a set of traffic lights for the intersection, and an Ethernet interface, as shown in Figure 1.
Each lane at an intersection is equipped with a ground-sensing coil. When a vehicle passes over the coil, it generates a signal that is converted into a 0–10V voltage signal by the signal conversion device and sent to the PLC. Based on this data, the system calculates the current traffic flow and adjusts the traffic light signals accordingly. An emergency button is also installed at each pedestrian crossing, allowing manual intervention when needed. The Ethernet interface supports interlocking control between multiple intersections, remote monitoring, and the integration of traffic management systems.
**3. Traffic Flow Detection**
**3.1 Ground-Sensing Coil**
The ground-sensing coil is a critical component in the intelligent traffic control system. It consists of a buried coil and a signal processing unit. The coil's specifications depend on factors like lane size and burial depth. Key parameters include inner diameter, outer diameter, wire gauge, and number of turns. Once these are determined, the coil’s performance can be optimized.
For optimal operation, the coil’s inductance should range between 100µH and 300µH. The number of turns is related to the coil’s circumference, with smaller circumferences requiring more turns. Table 1 provides a reference for the number of turns based on different sizes. However, environmental factors such as metal objects beneath the road can affect the coil’s inductance. Therefore, it is essential to test the coil’s actual inductance during installation and adjust the number of turns if necessary.
In practical applications, the wire material must also be considered for mechanical strength and resistance to temperature changes and corrosion. For durability, Teflon-coated high-temperature multi-strand wire is recommended.
As an example, a 60×60 cm simulated intersection was designed with a lane size of approximately 3 cm. The selected coil had an inner diameter of 1.8×2.3 cm, an outer diameter of 2.0×2.5 cm, a wire diameter of 0.05 cm, and 180 turns.
**3.2 Signal Conversion Device**
The ground-sensing coil works based on an oscillating circuit principle. The signal conversion device includes a common-emitter oscillator, resistors, capacitors, and the coil itself. When a vehicle passes over the coil, the inductance changes, altering the oscillation frequency. This change is filtered and converted into a stable DC voltage, which is then input into the PLC system for processing.
**3.3 Installation of the Ground Coil**
The ground coil is embedded in the road surface, typically near the stop line to detect vehicles entering and exiting the lane. Two coils are usually placed in each lane, one close to the stop line and the other slightly further back. This setup helps distinguish between vehicles waiting to pass and those already in the lane.
The installation process involves cutting grooves in the road, chamfering the corners to avoid damage, and sealing the area with asphalt or resin after the coil is placed. Proper grounding and shielding are important to prevent interference from external sources.
**4. System Software Design**
The system uses a modular programming approach, including normal operation, traffic signal processing, and emergency handling modules. The I/O allocation table (Table 2) outlines the input and output signals and their addresses.
In normal operation, the system adjusts signal timing based on detected traffic volume. If a significant number of vehicles are detected, the system may extend or shorten the green light duration. In case of emergencies, the emergency button overrides the normal sequence, allowing immediate passage.
**5. System Functionality**
This intelligent traffic light system improves efficiency by dynamically adjusting signal timings based on real-time traffic conditions. It reduces unnecessary waiting times, minimizes congestion, and enhances the flow of vehicles and pedestrians. It also offers humanized features, such as emergency buttons, and supports networked operations for remote monitoring and control.
**6. Conclusion**
The intelligent traffic light control system based on traffic flow offers a practical solution to urban traffic challenges. It is cost-effective, easy to install, and provides reliable performance. With its ability to adapt to varying traffic conditions, it represents a significant step toward smarter and more efficient urban mobility.
Fiber Glass lapped conductors (bare or enameled) are very suitable for windings of electric
motor stators, generators, special transformers and high voltage motors. In general this
insulation can be applied where high mechanical strength and high insulation properties
are required. It exhibits a very high degree of mechanical and thermal stability.
Temp. Class:F 155°C,H 180°C
Type of Insulation: Single /Double Layer of Glass Fiber
& Impregnated with Class F 155°C,H 180°C Varnish
September 11, 2025