High precision speed measurement by using interferometric techniques

7th International Congress of Engineering Physics

物理学;工业技术

Rodríguez Ávila, M.A.^1 ; Ochoa Valiente, R.O.^1 ; García Trujillo, L.A.^1

Facultad de Ciencias Físico Matemáticas, Universidad Autónoma de Coahuila, Saltillo, Coahuila de Zaragoza, Mexico^1

关键词: Digital signal processing techniques;    Experimental realizations;    He-Ne lasers;    High-precision;    Indirect measurement method;    Interferometric techniques;    Physical variables;    Speed measurement;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/582/1/012041/pdf
DOI  :  10.1088/1742-6596/582/1/012041

学科分类：工业工程学

来源: IOP

【 摘 要 】

In this work we present the experimental realization of speed measurement by the use of a two wave interferometer and digital signal processing techniques. We built an automated Michelson interferometer and using an He-Ne laser and with the use of the Fast Fourier Transform (FFT) and computer algorithms we derived a method for finding the speed of displacement. We report uncertainties in the order of 2-3 μm/s. with the use of this procedure. This brings the potential of another physical variable measurement like distance or pressure by this indirect measurement method. This approach is compared with an ultrasonic Logger Pro ® speed measurement system, and the results are compared between systems.