Longwall Cable Handling Monitoring for Bretby Dislodgement Detection
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Solution Overview
Problem
Longwall mining machines face downtime and damage due to the bretby cable handling system falling out of the pan line, requiring human operators to monitor it in hazardous conditions, and existing systems lack effective real-time failure detection.
Innovation Solution
A cable handling system with sensor nodes and transceivers that monitor the orientation, acceleration, and position of the service line, transmitting data to a controller for real-time analysis to detect imminent failures and prevent dislodgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If human operators visually monitor the bretby in proximity to the longwall mining machine, then the bretby can be monitored for dislodgement, but the operator is exposed to hazardous conditions including heat, dust, noise and moving machinery
Solution Approach 1:
The patent replaces the mechanical/visual monitoring system with an automated sensor-based monitoring system. Sensors detect the position and status of the bretby, and this data is transmitted to a control system that can alert operators remotely or automatically respond to dislodgement conditions, eliminating the need for operators to physically position themselves near moving machinery and hazardous environments
Solution Approach 2:
The patent introduces an intermediary monitoring system consisting of sensors, data transmission devices, and control systems that act as a mediator between the bretby and the operator. This intermediary system allows operators to monitor bretby status from a safe distance while maintaining reliable detection of dislodgement conditions
2Reliability
If the bretby is constrained within the pan line tray, then the service lines are protected from damage, but the bretby may still dislodge due to folding and stacking during shearer movement
Solution Approach 1:
The patent implements preliminary detection and warning systems that monitor bretby position and tension before dislodgement occurs. The system detects early signs of instability or improper positioning and can alert operators to correct the situation before actual dislodgement and damage occur
Solution Approach 2:
The patent employs a feedback system where sensors continuously monitor bretby position, tension, and alignment within the tray. This data is fed back to the control system, which can provide real-time alerts or automatically adjust shearer operation to prevent conditions that would cause dislodgement, thereby maintaining both protection and stability
3Productivity
If foreign objects are present in the pan line, then the mining operation can continue, but the bretby may experience adverse bending and dislodgement
Solution Approach 1:
The patent implements preliminary detection of foreign objects or abnormal conditions in the pan line using sensors that monitor bretby bending, tension, and position. When foreign objects are detected causing adverse bending, the system alerts operators to remove the objects before dislodgement occurs, allowing proactive maintenance while minimizing operational disruption
Solution Approach 2:
The patent uses feedback from sensors monitoring bretby condition to detect the presence of foreign objects causing adverse bending. The control system receives this feedback and can alert operators or automatically adjust operations to prevent dislodgement, balancing continued productivity with bretby integrity protection
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
Enables remote monitoring and automatic detection of potential failures, reducing downtime and damage by alerting operators and potentially shutting down the machine to prevent accidents.
Implementation Method 1
sensing and transmitting orientation, acceleration and/or position data of the service line using the plurality of sensor nodes
Implementation Method 2
sensing and transmitting orientation, acceleration and/or position data of the service line using the plurality of sensor nodes
Implementation Method 3
sensing and transmitting orientation, acceleration and/or position data of the service line using the plurality of sensor nodes
Implementation Method 4
using the plurality of transceivers to receive the orientation, acceleration and/or position data from the plurality of sensor nodes and to transmit the orientation, acceleration and/or position data to the controller
Data Source
AI summary
A method of operating a cable handling system of a longwall mining machine having a shearer movable along a pan line to mine material along a mine face, the cable handling system including:i) a service line configured to carry one or more supply lines to the shearer for facilitating shearer operation,ii) a plurality of interconnected trays to accommodate the service line,iii) a plurality of sensor nodes distributed along a length of the service line, andiv) a plurality of transceivers distributed along a length of the pan line, the method comprising:a) sensing orientation, acceleration and/or position data of the service line using the plurality of sensor nodes,b) using the plurality of transceivers to receive the orientation, acceleration and/or position data from the plurality of sensor nodes and to transmit the orientation, acceleration and/or position data to a controller, andc) detecting, by the controller, an actual or imminent failure mode of the service line using analysis of the orientation, acceleration and/or position data from the plurality of the sensor nodes.