TY - GEN
T1 - Implementation of laser Doppler vibrometer employing holographic optical elements
AU - Arbuckle, Tom
AU - Connelly, Michael J.
AU - Toal, Vincent
AU - Mihaylova, Emilia
PY - 2010
Y1 - 2010
N2 - We describe an implementation of a laser Doppler vibrometer system. Two main subsystems work in tandem to produce a novel and effective sensing combination. In the first subsystem, responsible for signal generation, many of the complex optical components commonly employed in more traditional vibrometry systems are replaced with holographic optical elements enabling an impressive reduction in the complexity of the system configuration and deployment. A visible light laser source is employed with obvious safety advantages over nonvisible sources. Laser intensity fluctuation signals created in the sensing optics are then captured using a photodiode. In the second subsystem, responsible for the signal processing, the signal is low-pass filtered and the d.c. component of the signal is removed before it is digitised. The data is passed to a host computer where an implementation of synthetic-heterodyne demodulation is employed to detect vibration signals of at least 2kHz. The output from this signal processing provides a measurement of the magnitude and frequency of the vibration. A simple graphical user interface controls the system's operation and displays the vibration results.
AB - We describe an implementation of a laser Doppler vibrometer system. Two main subsystems work in tandem to produce a novel and effective sensing combination. In the first subsystem, responsible for signal generation, many of the complex optical components commonly employed in more traditional vibrometry systems are replaced with holographic optical elements enabling an impressive reduction in the complexity of the system configuration and deployment. A visible light laser source is employed with obvious safety advantages over nonvisible sources. Laser intensity fluctuation signals created in the sensing optics are then captured using a photodiode. In the second subsystem, responsible for the signal processing, the signal is low-pass filtered and the d.c. component of the signal is removed before it is digitised. The data is passed to a host computer where an implementation of synthetic-heterodyne demodulation is employed to detect vibration signals of at least 2kHz. The output from this signal processing provides a measurement of the magnitude and frequency of the vibration. A simple graphical user interface controls the system's operation and displays the vibration results.
UR - http://www.scopus.com/inward/record.url?scp=77952362286&partnerID=8YFLogxK
U2 - 10.1109/SAS.2010.5439428
DO - 10.1109/SAS.2010.5439428
M3 - Conference contribution
AN - SCOPUS:77952362286
SN - 9781424449897
T3 - 2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings
SP - 139
EP - 142
BT - 2010 IEEE Sensors Applications Symposium, SAS 2010 - Proceedings
T2 - 2010 IEEE Sensors Applications Symposium, SAS 2010
Y2 - 23 February 2010 through 25 February 2010
ER -