Acoustic Sensor Extrusion Monitoring for Anomaly Detection
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Solution Overview
Problem
Existing extrusion installations face challenges in continuously monitoring and detecting operating anomalies, such as mechanical issues and material composition variations, due to their continuous and confined nature, making it difficult to prevent equipment failure and ensure product quality without disassembly.
Innovation Solution
An extrusion installation equipped with acoustic sensors on the sheath of the extruder that detect anomalies through acoustic vibrations, allowing for non-destructive and passive monitoring of the extrusion process, including frequency and amplitude analysis to identify issues like screw contact, lubrication changes, and foreign bodies, and enabling immediate intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acoustic sensors are installed on the sheath to enable continuous monitoring, then anomaly detection capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical inspection methods (requiring disassembly of the extruder) with acoustic sensing technology. The acoustic sensor detects anomalies through acoustic signals generated by mechanical events inside the extruder, eliminating the need for physical access or disassembly while enabling continuous monitoring.
Solution Approach 2:
The acoustic signal acts as an intermediary carrier of information about internal extruder conditions. The sensor detects acoustic vibrations caused by mechanical events (screw-sheath contact, foreign bodies, material composition changes) and transmits this information externally, allowing monitoring without direct physical contact with the confined extrusion space.
2Productivity
If the extruder operates continuously without disassembly, then productivity is improved, but ability to detect anomalies deteriorates
Solution Approach 1:
The acoustic monitoring system enables continuous detection throughout the extrusion process without interruption. The sensor operates continuously, capturing acoustic signals at all times the extruder is running, ensuring no anomalies go undetected while maintaining uninterrupted production.
Solution Approach 2:
The patent substitutes mechanical inspection (requiring stopping and disassembly) with acoustic sensing that operates continuously during extrusion. The acoustic sensor detects anomalies through sound waves generated by mechanical events, enabling monitoring without interrupting the continuous extrusion process.
3Object-affected harmful factors
If acoustic sensors are added to detect anomalies, then safety is improved, but device complexity increases
Solution Approach 1:
The acoustic sensor detects anomalies in their early stages before they lead to equipment failure or dangerous conditions. By continuously monitoring acoustic signals, the system identifies potential problems (screw misalignment, foreign bodies, material composition changes) early, enabling preventive action before safety risks materialize.
Solution Approach 2:
The patent replaces mechanical inspection methods with acoustic sensing for safety monitoring. The acoustic sensor provides continuous, non-contact detection of internal extruder conditions, improving safety without requiring physical access to confined spaces or disassembly of the extruder.
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 continuous detection and prevention of anomalies, enhancing safety by reducing the risk of sparks and combustion, and improving product quality by identifying composition variations, thus ensuring reliable operation and safe processing of materials with energetic fillers.
Implementation Method 1
The acoustic sensor fastened on the sheath of the extruder is sensitive to events occurring in the extruder that may be continuous or one-off and giving rise to acoustic vibration
Data Source
AI summary
A method of extruding a material including a binder and one or more energetic fillers and using an installation including an extruder including a sheath having at least one extrusion screw present therein, the extruder having at least one acoustic sensor fastened on the sheath, and a monitor system suitable for detecting an anomaly as a function of the acoustic signal picked up by the acoustic sensor, the monitor system being configured to measure variations in the amplitude of the acoustic signal picked up by the acoustic sensor, the method including an extrusion step for extruding the material through the extruder during which the acoustic signal picked up by the sensor is analyzed by the monitor system, and a detection step for detecting variation in the composition of the extruded material from variation in the amplitude of the acoustic signal.