Automated Pantograph Control for Overhead Line Tracking
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Solution Overview
Problem
Current systems for non-rail-bound electrical vehicles, such as electrified trucks, face challenges in maintaining contact with overhead energy lines, especially in poor visibility conditions and require complex and energy-intensive control systems due to limited detection range and high reaction times, leading to increased costs and mechanical stress.
Innovation Solution
A vehicle control facility that includes a position-determining unit for relative position detection, a specific-lane-determining unit for determining lane position data, and a vehicle-control unit for automated control, which communicates with a central specific-lane-determining facility to ensure reliable and efficient lane tracking, reducing the need for complex drive mechanics and high-energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex control systems with limited detection range are used, then contact with overhead energy lines can be maintained, but energy consumption increases and reaction time is delayed
Solution Approach 1:
The system performs preliminary detection of the overhead line position using a long-range detection device before the vehicle reaches the contact point. This allows the control system to calculate and prepare the appropriate contactor position in advance, reducing reaction time and energy consumption during actual contact maintenance.
Solution Approach 2:
A central control facility acts as an intermediary between the detection device and the vehicle's control systems. It processes detection data, calculates the specific lane position, and provides control commands, thereby decoupling the detection range limitations from the control response requirements.
2Reliability
If complex drive mechanics are used for lateral compensation, then contact with contact lines is maintained, but mechanical stress increases and costs increase
Solution Approach 1:
The system replaces complex mechanical lateral compensation mechanisms with an automated steering control system. Instead of using mechanical devices to physically adjust the vehicle position or contactor orientation, the system uses detection data to automatically control the steering, thereby reducing mechanical complexity and stress.
Solution Approach 2:
The system dynamically adjusts the vehicle's trajectory and steering based on real-time detection data of the overhead line position. This dynamic control approach allows the vehicle to maintain contact through steering adjustments rather than complex mechanical contactor adjustments.
3Measurement precision
If video cameras are used for position detection, then actual position can be detected, but detection fails in poor visibility conditions
Solution Approach 1:
The system changes the detection parameter from optical (video camera) to electromagnetic (radio wave-based detection device). This parameter change allows detection to function independently of visible light conditions, enabling operation in poor visibility weather while maintaining position detection accuracy.
4Reliability
If high reaction time control systems are used, then contact maintenance is achieved, but system response is delayed
Solution Approach 1:
The system performs detection and calculation of the specific lane position in advance using a long-range detection device. This preliminary action allows the control system to have head start in preparing control commands, significantly reducing the actual reaction time when contact maintenance is required.
Solution Approach 2:
The central control facility serves as an intermediary that processes detection data and prepares control commands in advance, decoupling the detection range from the control response time. This allows the system to maintain reliability while reducing perceived reaction time.
Data Source
AI summary
A vehicle control facility for the automated control of an electrical road vehicle for a route system with an energy-supply system that includes a lane-bound energy supply line, in particular an overhead line system. A position-determining unit determines a geographical position of the electrical road vehicle. A specific-lane-determining unit determines position data for a specific lane assigned to the lane-bound energy supply line. A communication interface transmits current relative positions of infrastructure features with respect to the electrical road vehicle to an external central specific-lane-determining facility and receives position data. A vehicle-control unit controls the electrical road vehicle with respect to the determined specific lane in dependence on the determined relative position of the specific lane.