Vibrometri

Vibrometri, or vibrometry, is the measurement of vibrations in objects and structures. It covers techniques that quantify motion in terms of displacement, velocity, acceleration, frequency, and phase. Practically, vibrometry combines sensors and data processing to characterize how an object responds to dynamic excitation, whether the sensor is in contact with the surface or uses non-contact optical methods. It is used across engineering, physics, and quality assurance to study dynamic behavior.

For contact vibrometry, sensors such as accelerometers, piezoelectric devices, or capacitive displacement transducers attach to the object to track surface motion. Non-contact vibrometry relies on optical methods, notably laser Doppler vibrometry (LDV), interferometry, and holographic vibrometry, which measure the velocity or displacement of a vibrating surface without physical contact by analyzing light scattered from the surface.

Common categories include laser-based non-contact vibrometers, contact vibrometers, and full-field optical methods such as digital holographic vibrometry.

Applications include modal analysis of mechanical components, rotor dynamics, automotive and aerospace testing, civil engineering for structures under dynamic loads, microelectromechanical systems, and nondestructive evaluation. Vibrometry supports design validation, fault detection, and structural health monitoring by providing detailed frequency-domain and time-domain responses.