Rotor Load Monitoring for Obstacle-Aware Milling Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Construction machines, such as rotary mixers and cold planers, face challenges in monitoring and protecting their rotors from damage during operations, especially when encountering obstacles on uneven terrains, which can lead to equipment damage and increased maintenance costs.
Innovation Solution
A system comprising a drive system with a power source, a milling system, and a controller that uses sensors to measure pressure and tension in the drive member, allowing the controller to determine if the rotor has encountered an object capable of damaging it, and automatically take protective actions such as raising the rotor or decoupling it from the power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotor operates continuously on uneven terrains, then productivity is improved, but the risk of rotor damage increases
Solution Approach 1:
The system performs preliminary detection by monitoring drive member tension before the rotor actually encounters damage. The controller detects abnormal tension patterns that indicate upcoming obstacles, allowing the system to take preventive action (raising or decoupling the rotor) before damage occurs, thus maintaining both continuous operation capability and rotor safety
2Reliability
If the rotor is raised or decoupled frequently to avoid damage, then rotor reliability is improved, but machine downtime increases
Solution Approach 1:
The system uses continuous feedback from tension sensors on the drive member to monitor rotor loading conditions in real-time. The controller processes this feedback data to distinguish between normal tension variations and abnormal patterns indicating obstacles, enabling intelligent decision-making that minimizes unnecessary rotor raises or decouplings while still protecting against actual damage risks
Solution Approach 2:
By detecting abnormal tension patterns before the rotor actually contacts damaging objects, the system takes preliminary protective action only when truly necessary. This prevents both over-protection (unnecessary downtime) and under-protection (actual damage), optimizing the balance between rotor safety and operational continuity
3Measurement precision
If tension sensors are installed on the drive member, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system uses the existing drive member tension as a self-indicating parameter of rotor loading conditions. Rather than requiring complex external measurement equipment, the patent leverages the natural mechanical tension in the drive member itself, which automatically reflects the rotor's encounter with obstacles. This self-service approach provides accurate damage risk detection while minimizing additional system complexity
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 system effectively prevents rotor damage by detecting potential hazards in real-time, reducing downtime and maintenance costs, and ensuring continuous operation on varied terrains.
Implementation Method 1
a sensor configured to measure the tension of the drive member
Data Source
AI summary
A machine for road work for road work, the machine can comprise: a frame, a drive system including a power source carried by the frame, a milling system driven by the power source and a controller. The milling system can comprise: a rotor configured to rotate and remove an amount of material from a working area; a drive member coupling the rotor to be driven by the power source; a tensioner assembly configured to tension the drive member; and a sensor configured to measure the tension of the drive member. The controller can be configured to, in response to a signal received from the sensor, determine if the rotor has encountered an object capable of damaging the rotor.