EOL Systems for DSP Analysis
End-of-Line (EOL) test systems are used in production lines to ensure that products meet quality and functionality standards before delivery. When integrated with DSP (Digital Signal Processing) analysis, they enable real-time processing and analysis of digital signals, such as vibrations, sounds, or electrical signals, to diagnose anomalies or verify technical specifications.
Thanks to advanced signal processing, EOL systems with DSP analysis offer precision, speed, and flexibility, making them essential for ensuring quality and reliability, especially in sectors where dynamic or acoustic performance is critical.
Goals
Quality Control
Verification of the product's technical specifications.
Identification of defects such as abnormal noises, out-of-spec vibrations, or electrical malfunctions.
Production Optimization
Monitoring of parameters to minimize variability between products.
Reduction of waste and rework.
Diagnostica
Early identification of faults or latent issues.
Support for predictive maintenance.
Tracciabilità
Recording of results for historical analysis and subsequent checks.
Fundamental Elements
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Controlled sources: Injection of predefined signals (vibrations, sine waves, white noise) to stimulate the system.
Natural inputs: Use of signals generated by the product itself (motors, speakers, integrated sensors).
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•Dedicated sensors to collect generated signals:
Accelerometers: For vibrations.
Microphones: For acoustic signals.
Current/voltage transducers: For electrical signals.
• Signal conditioning systems to amplify, filter, and digitize the collected data.
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• Digital filtering: Removal of noise and unwanted components.
• Frequency analysis: Fourier Transform (FFT) to identify relevant frequencies or anomalies.
• Time-domain analysis: Evaluation of peaks, amplitudes, and response times.
• Advanced techniques:
Harmonic analysis: Identification of distortions or defects.
Predictive models: AI or machine learning algorithms for anomaly pattern recognition.
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Interface for system management, data processing, and result visualization.
Ability to integrate databases for storage and traceability.
Automation of testing processes with real-time feedback.
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Integration with PLC (Programmable Logic Controller) and MES (Manufacturing Execution System).
Automated pass/fail testing with visual or electronic signaling.
Measurement Protocols
Preparation
System configuration based on the model or product specifications.
Calibration of sensors and verification of operating conditions.
Testing
Controlled excitation of the product (e.g., activation of motors or acoustic speakers).
Real-time signal acquisition and analysis.
Feedback
Communication with production systems to report anomalies.
Updating parameters in tracking systems.
Evaluation
Comparison of results with predefined threshold values.
Automatic generation of reports with outcome (pass/fail).
Technologies and Standards Used.
IEEE and ISO standards to define test requirements and signal analysis.
Compression algorithms and AI techniques to enhance speed and accuracy of analysis.
Industrial communication protocols, such as OPC-UA, to integrate the EOL system into the production network.
Reference Products
NVA - Noise Vibration Anaylzer
The reference tool for studying dynamic signals.
NVT - Noise Vibration Tester
Multi-Purpose Measurement Software for Acoustic and Vibration Phenomenon Analysis
NVT-HMS - Health Monitoring System
Integrated System for Vibration and Dynamic Parameter Monitoring
Applications
Evaluation of noise and vibrations of motors and compressors.
NVH (Noise, Vibration, Harshness) testing on engines, transmissions, and audio systems.
Verification of sensors and electronic control units.
Testing of audio devices, microphones, and speakers.
Testing of electrical components to detect noise or distortion.
Verification of high-performance electronic and mechanical components.