Wavelength division sensing RF vibrometer

Author

Yan, Yan ; Li, Changzhi ; Rice, Jennifer A. ; Lin, Jenshan

Author_Institution

Univ. of Florida, Gainesville, FL, USA

fYear

2011

fDate

5-10 June 2011

Firstpage

1

Lastpage

4

Abstract

A wavelength division sensing RF vibrometer which is implemented as a tunable carrier frequency Doppler radar sensor was used for the first time to accurately measure mechanical vibrations of complex patterns. The amplitude ratio of a pair of baseband harmonics under different carrier wavelengths was used to obtain the vibration patterns. A software-controlled PLL was built to generate carrier frequencies from 5.5 to 6.5 GHz. The accuracy of the recovered vibration pattern using the noncontact RF vibrometer rivals other contact measurement instruments, such as LVDT and accelerometer.

Keywords

Doppler radar; accelerometers; differential transformers; mechanical contact; phase locked loops; radiofrequency measurement; vibration measurement; LVDT; accelerometer; amplitude ratio; baseband harmonics; carrier wavelength; complex vibration pattern; contact measurement instrument; frequency 5.5 GHz to 6.5 GHz; mechanical vibration measurement; noncontact RF vibrometer; software-controlled PLL; tunable carrier frequency Doppler radar sensor; wavelength division sensing RF vibrometer; Accelerometers; Baseband; Frequency modulation; Harmonic analysis; Radio frequency; Vibrations; Vibrometers; Accelerometer; Doppler radar; Linear Variable Differential Transformer (LVDT); harmonic; noncontact; nonlinear; quadrature; vibration; wavelength division;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International

Conference_Location

Baltimore, MD

ISSN

0149-645X

Print_ISBN

978-1-61284-754-2

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2011.5972827

Filename

5972827