laserDopplervibometrit

Laser Doppler vibrometry is a non-contact optical measurement technique used to determine surface velocity and displacement of vibrating objects. It operates by employing the Doppler effect, which states that the frequency of a wave changes when the source of the wave and the observer are moving relative to each other. In a laser Doppler vibrometer, a laser beam is directed at the vibrating surface. A portion of this beam is reflected back, and due to the Doppler shift caused by the surface's motion, its frequency is altered. The vibrometer then compares the frequency of the reflected beam with the frequency of the original emitted beam. The difference in frequency, known as the Doppler shift, is directly proportional to the velocity of the vibrating surface. This velocity can then be integrated over time to calculate displacement.

The measurement is non-contact, meaning the vibrometer does not need to touch the object being measured, preventing any influence on the vibration being studied. This makes it ideal for measuring delicate or inaccessible surfaces. Laser Doppler vibrometers are known for their high accuracy, sensitivity, and wide frequency range. They are utilized in a variety of fields, including structural health monitoring, automotive engineering for analyzing engine vibrations, acoustics research, and in the semiconductor industry for inspecting micro-machinery. The precision of the measurement allows for detailed analysis of complex vibration patterns, contributing to improved product design and troubleshooting.