Materials Mechanics
Monocular 3D Video Extensometer
In engineering, vibration testing is an essential part of reliability verification for structures and products. It is not simply shaking a product on a vibration table; through systematic test methods it reveals the dynamic response of a product under real working conditions, providing a scientific basis for design optimization, quality control and safe operation.
I. Core Uses of Vibration Testing
1. Research and design stage
Resonance and modal identification: determine natural frequency, damping ratio and mode shapes to avoid structural resonance within the operating frequency band.
Model updating: feed test data back into the finite element model to improve simulation accuracy.
NVH optimization: analyze noise, vibration and comfort issues to guide vibration isolation and damping design.
Fatigue and life evaluation: predict stress levels and fatigue life of key parts through random vibration or road spectrum reproduction.
2. Manufacturing and quality control stage
Incoming and factory verification: check the vibration resistance of components, assemblies and complete machines to ensure compliance with standard requirements.
HASS/HALT stress screening: expose potential defects early under heightened environments, improving product consistency.
Transport and packaging optimization: optimize cushioning and packaging design through transport vibration simulation and impact testing.
3. Operation, maintenance and diagnosis stage
Condition monitoring: identifying unbalance, looseness, and bearing and gear fault characteristic frequencies of rotating machinery.
Structural health monitoring (SHM): track modal changes of bridges, wind turbines, rail transit and other structures to discover local damage early.
Predictive maintenance: perform life prediction based on vibration monitoring data to reduce sudden downtime.
4. Certification and regulation stage
vibration testingis an important means of meeting international standards such as IEC 60068 and MIL-STD-810, ensuring that products can smoothly enter automotive, aerospace, communication and other industry applications.
II. Common Vibration Testing Methods
Sine vibration:Used for resonance search and fatigue dwell.
Random vibration:Evaluate energy distribution in complex environments through power spectral density (PSD) and root-mean-square acceleration (Grms).
Impact and collision:Examines the transient response and structural strength of the product.
Modal testing:Identify natural frequency, damping ratio and mode shapes for model validation and damage identification.
IV. Advantages of the Haytham Single-Camera 3D High-Speed Visual Strain Gauge
In traditional vibration testing, accelerometers and strain gauges are mostly point measurements that can hardly restore full-field information. The single-camera 3D high-speed visual strain gauge launched by Haytham provides more efficient and comprehensive data support in vibration testing:
Simplified operation, higher efficiency:no multiple sensors or complex calibration needed; a single camera completes the measurement, greatly saving test time and hardware cost.
Full-field measurement with comprehensive data:Record structural full-field deformation and strain in real time, fully presenting dynamic responses and avoiding the blind spots of traditional point measurement.
High-speed sampling precisely handling rapid changes:Supporting sampling frequencies up to 100,000 Hz, it captures transient strain under extreme conditions such as explosions and impacts, ensuring result accuracy and reliability.
Flexible adaptation meeting multi-scenario needs:The instrument is moderate in size with flexible optical path design, adapting to narrow spaces and high-frequency environments — suitable for both laboratory research and engineering field testing.
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