Vibroacoustic Analysis Measurement Systems
Vibroacoustic analysis is a field dedicated to the study of vibrations and sound generated by a system or environment, playing a crucial role in sectors such as mechanical, aerospace, automotive, and civil engineering. This analysis is essential for diagnosing problems, optimizing performance, and improving acoustic comfort. Specific measurement systems are used to acquire, process, and analyze vibroacoustic signals.
Measurement systems for vibroacoustic analysis are indispensable tools in both scientific and industrial applications. A proper selection of sensors, acquisition systems, and analysis methods allows for the collection of detailed and reliable data, which is crucial for improving design, solving issues, and ensuring optimal performance across various contexts.
Types
Vibration Analysis
Determination of natural frequency and damping.
Analysis of excitations and structural responses.
Fault diagnosis in machinery (e.g., bearings or gears).
Acoustic Analysis
Measurement of sound pressure level (SPL).
Acoustic mapping (sound mapping).
Studies on speech intelligibility or noise reduction.
Modal Analysis
Determination of the natural vibration modes of a structure.
Identification of frequencies and modal shapes through experimental techniques.
NVH Analysis (Noise,Vibration,Harshness)
Automotive and transportation sector specification to improve comfort and performance.
Components
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Accelerometers: Measure vibration accelerations. They can be piezoelectric, capacitive, or MEMS, depending on the application.
Microphones: Used to measure sound pressure. Precision models (class 1) are used for high-quality analysis, while simpler models are used for general applications.
Laser Transducers: For non-contact measurement of vibrations on surfaces.
Hydrophones: For underwater acoustic measurements.
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DAQ (Data Acquisition Systems): Hardware systems capable of digitizing analog signals with high resolution and speed.
ADC Modules (Analog-to-Digital Converter): Converters with precision specifications for dynamic signal analysis, equipped with anti-aliasing filters and simultaneous channel sampling.
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Spectral Analysis (FFT, STFT): Used to identify dominant frequencies in a signal.
Time-Frequency Analysis: Applied to transient signals, providing insights into how signal frequency content evolves over time.
Advanced Techniques: Such as modal analysis, beamforming, or sound intensity analysis for more detailed investigations.
Computational Libraries: For signal processing, including tools like LabVIEW or dedicated software for data analysis and visualization.
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Shakers: Used to generate controlled vibrations for exciting a structure or system in dynamic testing.
Acoustic Sources: Used for testing the acoustic response of a system, such as speakers or specialized sound generators designed to emit controlled sound signals for analysis.
Measurement Protocols
System Preparation
Calibration of sensors and instruments.
Selection of sampling frequencies based on the phenomenon to be analyzed.
Strategic placement of sensors.
Data Acquisition
Signal collection with attention to avoid aliasing and spurious noise.
Control of environmental conditions for acoustic measurements.
Post-Processing
Filtering and cleaning of data.
Analysis in the time and frequency domain.
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
Applicazioni
Support the efficiency and safety of industrial plants by enabling the monitoring and diagnosis of vibrations and noise to prevent failures and optimize operational performance.
Ensure that vehicles meet customer expectations for comfort and noise management by evaluating traction components and vibrations from the suspension systems and the vehicle structure.
In the energy sector, vibroacoustic analysis is used to monitor turbines, generators, and pumps, detect early faults, optimize the efficiency of rotating machines, and reduce vibrations and noise in wind, hydroelectric, and thermal power plants.
In the aerospace sector, vibroacoustic analysis is used to monitor the structural health of aircraft and components, detect anomalies, optimize the performance of engines and aerodynamic systems, and reduce vibrations and noise to improve comfort and safety.