Abstract
We propose a novel laser speckle velocimeter using two self-mixing laser diodes (SM-LDs). It has been observed that the speckle signal measured by the measurement system has a strong dependence on the path illuminated by an SM-LD. When a thin surface with a different surface characteristic attached to a moving plane is illuminated the frequency of the intensity changes of the waveform changes. Finding the time instant when this target surface is illuminated gives the opportunity to find the velocity of the moving plane. In this study we propose a method to find the time at which the surface is started to be illuminated and exploit this change in the waveform of the speckle signal to detect the velocity of the target transversely translating across the laser beam.
Original language | English (US) |
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Title of host publication | Proceedings of the SICE Annual Conference |
Editors | Anon |
Publisher | Society of Instrument and Control Engineers (SICE) |
Pages | 947-950 |
Number of pages | 4 |
State | Published - Dec 1 1997 |
Event | Proceedings of the 1997 36th SICE Annual Conference - Tokushima, Jpn Duration: Jul 29 1997 → Jul 31 1997 |
Other
Other | Proceedings of the 1997 36th SICE Annual Conference |
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City | Tokushima, Jpn |
Period | 7/29/97 → 7/31/97 |
All Science Journal Classification (ASJC) codes
- General Engineering