Road Milling Machine Loading Control via Sensor Feedback
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Solution Overview
Problem
The operation of road milling machines is challenging due to the need for continuous monitoring of the transport vehicle's position relative to the milling device during loading, which increases the workload for the machine operator and poses safety risks due to poor visibility and the risk of overloading.
Innovation Solution
A method using a sensor device to detect the relative position of the transport container and control the loading process automatically, allowing the machine operator to focus on milling operations and reducing the need for constant monitoring, with a control unit coordinating the loading process and providing signals for the driver of the transport vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the machine operator continuously monitors the transport vehicle's position and loading process, then the loading process can be controlled safely and accurately, but the operator's workload increases significantly and visibility is limited
Solution Approach 1:
The system enables self-service by implementing automatic monitoring and control functions that operate independently of continuous human intervention. Sensors detect the transport vehicle's position and loading status, while the control unit automatically regulates the conveyor device based on detected parameters, allowing the system to manage itself without requiring constant operator attention
Solution Approach 2:
The patent replaces manual mechanical monitoring and control with automated sensor-based detection and electronic control systems. Optical sensors, position detectors, and control units substitute for the operator's visual monitoring and manual control actions, transforming a mechanically-intensive manual operation into an automated electro-mechanical system
2Manufacturing precision
If the operator focuses on milling operations, then milling quality improves, but the transport vehicle's position cannot be monitored continuously
Solution Approach 1:
The system implements feedback by using sensors to continuously detect the transport vehicle's position and loading status, then feeding this information back to the control unit. The control unit processes this feedback and automatically adjusts the conveyor device's operation accordingly, creating a closed-loop control system that maintains reliability without requiring operator attention
Solution Approach 2:
The patent introduces an intermediary control unit that acts as a mediator between the sensor detection system and the conveyor device. This control unit receives position and loading status information from sensors, processes the data, and automatically controls the conveyor device, serving as an intelligent intermediary that enables autonomous operation
3Productivity
If the transport vehicle moves at high speeds (up to 100 km/h), then transportation efficiency improves, but overloaded vehicles pose higher safety risks
Solution Approach 1:
The system uses feedback from load detection sensors to continuously monitor the loading status and provide real-time information to the control unit. This feedback mechanism enables automatic regulation of the loading process to prevent overloading, allowing high-speed transportation to proceed safely by maintaining optimal load conditions
Solution Approach 2:
The patent replaces manual load monitoring and estimation with automated sensor-based detection systems. Load cells, weight sensors, or volume detection devices automatically measure and report the actual load status, substituting human judgment with precise electronic measurement to eliminate safety risks associated with high-speed overloaded transport
4Ease of operation
If the conveyor device transports material to the front loader position, then the transport vehicle can drive ahead on unmilled ground, but the operator's visibility of the loading trough is limited
Solution Approach 1:
The system achieves self-service by implementing automatic position detection and control functions that eliminate the need for operator visual monitoring of the loading trough. Sensors and control units automatically detect the transport vehicle's position and regulate the conveyor device, allowing the system to operate independently without requiring the operator to see areas with limited visibility
Data Source
AI summary
The invention relates to a method for controlling the loading process of a transport vehicle by means of a milling device operating in milling mode, a device for carrying out this method, and a road milling machine or a device for removing soil material with such a device. A key aspect of the invention lies in a sensor device by means of which the position and, in part, the fill level of the transport vehicle's transport container can be determined.