Title :
A method for remote measurements of velocity for vibration analysis
Author :
Papageorgiou, Ch ; Kosmatopoulos, C. ; Laopoulos, Th
Author_Institution :
Lab. of Electron., Aristotelian Univ. of Thessaloniki, Greece
Abstract :
This paper describes a noncontact method based on ultrasonics for measuring remotely certain “parameters of motion” of a vibrating surface. The measurement technique is using a pair of 40 kHz air ultrasonic transducers to send a short burst and receive the reflected waveform. The main point is that the frequency of the received signal is measured and the analysis is based on the information about short term frequency variations. These variations of frequency of the received signal are the result of the Doppler effect, which means that by measuring the incoming frequency in an accurate and fast way, one can calculate then the instant value of the velocity of the vibrating surface
Keywords :
Doppler effect; ultrasonic materials testing; ultrasonic measurement; ultrasonic transducers; vibration measurement; 40 kHz; Doppler effect; air ultrasonic transducers; measurement technique; parameters of motion; remote US measurements; short term frequency variations; vibrating surface; vibration analysis; Attenuation; Doppler effect; Frequency measurement; Measurement techniques; Optical surface waves; Signal analysis; Testing; Ultrasonic variables measurement; Velocity measurement; Vibration measurement;
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Conference_Location :
Pafos
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.814452
