Abstract
Spurious illumination penetrating into a gas duct adversely affects the performance of a laser gage measuring the concentration of solid particles dispersed in the air flow. The noise and gas duct vibration caused by the noise and vibration of the flow driver and other sources mechanically connected to the gas duct modulate the spurious radiation so that it may generate a signal that is perceived as a useful one by a photodetector. The noise-and vibration-modulated spurious illumination, as well as its optical-to-electric conversion with consideration for the spectral characteristics and the connection of the photodetector to the laser gage, is analyzed. From the amplitude and frequency properties of real noise and vibration sources causing the gas duct walls, on which the laser gage is mounted, to vibrate, the effect of the parasitic illumination is estimated. The operating parameters of a laser gage with double amplitude modulation and subsequent double synchronous detection, which make it possible to considerably improve its noise immunity, are proposed.
Similar content being viewed by others
References
A. V. Rybalko, P. V. Charty, and V. G. Shemanin, Proc. SPIE 4316, 130 (2000).
V. E. Privalov, V. G. Shemanin, and P. V. Charty, Proc. SPIE 5066, 140 (2002).
V. E. Chukardin and P. V. Chartii, Bezopasnost Zhiznedeyatelnosti, No. 9, 50 (2003).
V. E. Privalov, P. V. Charty, and V. G. Shemanin, Proc. SPIE 5447, 242 (2004).
V. E. Privalov, A. V. Rybalko, P. V. Chartii, and V. G. Shemanin, in Proceedings of the Conference “Lasers in Medicine, Biology, and Environmental Protection,” St. Petersburg, 2002, pp. 37–38.
R. M. Measures, Laser Remote Sensing: Fundamentals and Applications (Wiley, New York, 1984; Mir, Moscow, 1987).
G. G. Ishanin, E. D. Pankov, A. L. Andreev, and G. V. Polshchikov, Sources and Detectors of Radiation (Politekhnika, St. Petersburg, (1991) [in Russian].
K. A. Putilov, Course of General Physics, Vol. 1: Mechanics, Acoustics, Molecular Physics, Thermodynamics (GIFML, Moscow, 1962) [in Russian].
S. M. Kozulin and T. K. Tonkikh, Tsement, No. 10, 14 (1982).
G. I. Telegin, Prib. Tekh. Éksp., No. 1, 121 (1985).
E. S. Voropaĭ and P. A. Torpachev, High Amplitude Resolution Photometry (Universitetskoe, Minsk, 1988) [in Russian].
V. E. Privalov, P. V. Chartiĭ, and V. G. Shemanin, in Proceedings of the 6th International Conference on Applied Optics, St. Petersburg, 2004, Vol. 1, pp. 242–246.
Author information
Authors and Affiliations
Additional information
Original Russian Text © V.E. Privalov, A.V. Rybalko, P.V. Charty, V.G. Shemanin, 2007, published in Zhurnal Tekhnicheskoĭ Fiziki, 2007, Vol. 77, No. 3, pp. 62–65.
Rights and permissions
About this article
Cite this article
Privalov, V.E., Rybalko, A.V., Charty, P.V. et al. Effect of noise and vibration on the performance of a particle concentration laser meter and optimization of its parameters. Tech. Phys. 52, 352–355 (2007). https://doi.org/10.1134/S1063784207030115
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1134/S1063784207030115