Vibrometry by laser-doppler technology
|Coordinator||RISE Research Institutes of Sweden AB - Mätteknik Borås|
|Funding from Vinnova||SEK 700 000|
|Project duration||January 2019 - December 2020|
Purpose and goal
The project is aiming to increase the frequency range and include phase information to the primary calibrations of accelerometers. This is done by developing a method that is using laser-doppler technique. The goal of the project is also to develop a method to measure the acceleration of colliding bodies in a set-up for dynamic force calibration.
Expected results and effects
The project is expected to broaden the scope of primary calibration of accelerometers regarding frequency range as well as amplitude. It will give new knowledge and lower the need for externally bought traceability. The project will also increase the competence in dynamic force calibration.
Planned approach and implementation
The project is divided into four parts, which are executed in a chronological but partly overlappling order. These are (1) design and implementation of a doppler demodulator, (2) implementation of a laser vibrometer and the demodulator in a system for primary calibration of accelerometers by sinusoidal excitation, (3) implementation of the laser-doppler technique in a system for primary calibration of accelerometers by shock excitation and (4) construction of a dynamic force excitation rig prototype.