Hydraulic Support Fault Node Detection via CAN Bus Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydraulic supports in underground coal mining environments face communication errors due to interference factors like vibration, electromagnetic interference, and debris, leading to node failures and transmission interruptions, which are difficult to diagnose manually in dark and dusty conditions, affecting reliability and efficiency.
Innovation Solution
A system for remotely locating communication errors using a control panel, support controller, data converter, and dual support drivers connected via CANH and CANL twisted pairs, with WiFi signal transmission and error calculation using the formula n=pt8m, allowing for quick and accurate fault node detection and automatic correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual detection method is used to locate communication error nodes, then no additional equipment is needed, but the work intensity is high and time-consuming in dark and dusty underground environment
Solution Approach 1:
The patent replaces manual mechanical detection with an automated electronic detection system. The support controller automatically sends detection commands through the CAN bus to each node, receives response signals, and identifies fault locations without manual intervention. This substitution of mechanical manual detection with electronic automated detection resolves the contradiction by significantly reducing both time and work intensity for fault location.
2Reliability
If CAN bus communication is used in underground environment, then communication between hydraulic support nodes is established, but communication reliability is affected by vibration, electromagnetic interference, dust and circuit wear
Solution Approach 1:
The patent implements error detection and fault tolerance mechanisms before communication failures can propagate. The support controller continuously monitors CAN bus communication, detects errors in real-time, and can switch to alternative communication paths or methods. This beforehand cushioning approach addresses the contradiction by preparing the system to withstand environmental interference, thereby maintaining communication reliability despite vibration, electromagnetic interference, and dust conditions.
3Reliability
If one hydraulic support node has communication error, then the fault can be detected, but communication states of other hydraulic supports are affected and shutdown may result causing economic loss
Solution Approach 1:
The patent implements a feedback mechanism where each hydraulic support node sends acknowledgment signals to the support controller to confirm successful command reception and execution. The support controller monitors these feedback signals continuously. When a node fails to respond or sends an error signal, the controller immediately identifies the fault location and can isolate or bypass the faulty node, preventing error propagation to other nodes. This feedback mechanism resolves the contradiction by enabling early fault detection and containment, maintaining system continuity despite individual node failures.
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 significantly reduces work intensity and improves efficiency by enabling rapid identification and correction of communication faults, ensuring continuous operation and reducing the risk of economic losses from hydraulic support shutdowns.
Implementation Method 1
The data converter converts the WiFi signal into a message signal and transmits the message signal to the support controller
Data Source
AI summary
A system and method for remotely locating a communication error support for hydraulic supports. The system includes a control panel, a support controller, a data converter, and two support drivers of the same type. Each support driver has two bus interfaces. The control panel transmits a control command to the data converter in a form of a WiFi signal. The data converter converts the WiFi signal into a message signal and transmits the message signal to the support controller. The support controller transmits the control command to the two support drivers, respectively. The support drivers transmit the command through CANH twisted pairs and CANL twisted pairs. When a bus for transmitting the command of a certain node has an error, the support controller calculates the fault node according to a formulan=pt8m,and feeds back the fault node onto the control panel.