Trolley Wire Detection for Electric Dump Truck Sliders
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Solution Overview
Problem
The existing trolley-based traveling technology for dump trucks in mines requires heavy driver involvement to maintain contact with trolley wires, leading to driver fatigue and increased risk of slider disengagement and equipment damage, as visual checks are necessary to ensure proper alignment and operation, especially in environments without lane markers and changing road conditions.
Innovation Solution
An electrically driven dump truck equipped with a trolley wire detecting device that detects trolley wires from below and a control device that adjusts the slider's elevation based on detected information, reducing driver workload and improving detection accuracy by minimizing visual reliance and environmental factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver visually checks the vehicle's displacement with respect to the trolley wires and performs steering operations to maintain contact, then the slider remains in contact with the trolley wire, but the driver experiences heavy operational load and fatigue
Solution Approach 1:
The system enables automatic trolley traveling by having the vehicle itself detect its position relative to the trolley wire and automatically adjust the slider elevation, eliminating the need for continuous driver visual monitoring and manual steering operations. The vehicle performs the alignment task on its own through the detection device and control system.
Solution Approach 2:
The manual visual-check-and-steer system is replaced with an automated detection and control system. The trolley wire detecting device uses sensors (optical, radar, or camera-based) to detect the trolley wire position, and the control device automatically adjusts the slider elevation mechanically, substituting the driver's visual and manual operations with automated sensing and actuation.
2Reliability
If the driver performs continuous visual monitoring to prevent slider disengagement, then equipment damage is prevented, but the complexity of the operation increases
Solution Approach 1:
The detection device continuously monitors the vehicle's position relative to the trolley wire and provides feedback to the control device. This closed-loop feedback system automatically adjusts the slider elevation based on real-time detection data, ensuring reliable prevention of disengagement without requiring complex driver operations. The system self-regulates based on detected position deviations.
Solution Approach 2:
The vehicle system performs self-monitoring and self-adjustment of the slider position. The detection device and control device work together to automatically maintain proper slider alignment, making the system self-regulating and eliminating the need for complex manual operational procedures while maintaining high reliability.
3Ease of operation
If a trolley wire detecting device is introduced to automate slider elevation control, then driver workload is reduced, but the device complexity increases
Solution Approach 1:
The trolley wire detecting device serves as an intermediary between the vehicle's position and the slider elevation control. It detects the trolley wire position and transmits this information to the control device, which then adjusts the slider. This intermediary detection system automates the process, reducing driver workload despite adding technological components.
Solution Approach 2:
The manual mechanical steering and visual monitoring system is replaced with an automated detection and control system. The detecting device (using optical, radar, or sensor technology) and control device work together to automatically adjust slider elevation, substituting complex manual operations with automated technological systems that simplify the driver's role.
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 solution significantly reduces driver workload by enhancing trolley wire detection accuracy and maintaining slider alignment with the trolley wires, thereby preventing equipment damage and improving operational safety and efficiency.
Implementation Method 1
a trolley wire detecting device which is provided on the vehicle and detects the trolley wire from below
Data Source
AI summary
A vehicle control device 50, a controller 100, an inverter control device 30 and a steering control device 32 constitute a control device 200 which controls elevation of sliders 4Ra and 4La of power collectors 4R and 4L based on information detected by a trolley wire detecting device (camera) 15. The control device 200 calculates positional relationship between a slider and a trolley wire 3R/3L based on the information detected by the trolley wire detecting device. When the slider has deviated from a prescribed range for being in contact with the trolley wire, the control device executes control to prohibit an operation for elevating the sliders or to lower the sliders when the sliders have been elevated. With this configuration, an electrically driven dump truck capable of lightening the operating load on the driver during the trolley traveling is provided.