RESEARCH OF AEROSOL FORMATION INFLUENCE ON OPTICAL LOCATIONAL DEVICES OPERATION
Journal Title: Сенсорна електроніка і мікросистемні технології - Year 2017, Vol 14, Issue 2
Abstract
This work is aimed at investigating the interaction of optical radiation with aerosol formations of various origin, determining the aerosol interference signs and using them for interference immunity . The research method basis is the relationship between the amplitude of the reflected signal and the aerosol scattering characteristics, as well as the length of the sensing line. The investigations were carried out in a chamber of artificial aerosols in the density range including real atmospheric formations. In the studies we used OED model whose electrical circuit was built on a 2-channel transmit-receive principle. The transmission channel is based on a GaAs-LED with a radiation wavelength of 0.91 μm. The receiving channel is made on the Si-microcircuit M72 basis, which is a photodiode with an amplification cascade. The measured dependences of the reflected signal amplitude on the aerosol interference density showed that at a reflected power value of less than the radiation source power, no OED threshold triggering occurs at 66-84 dB. The dependence of the reflected signal amplitude on the distance to the aerosol environment edge showed that there is no clear aerosol boundary detection, but an interference signal is formed at a distance determined by the backscattering radiation coefficient. The threshold signal detection by the photodetector was used to determine the depth of the aerosol formations location, which could cause OED failure. The OED amplitude characteristic research during motion in an aerosol environment showed the presence of density fluctuations that cause amplitude oscillations. The result of this work is the determination of the value range of the aerosol environment density, in which the radiation backscattering does not lead to the OED threshold triggering. The signs of the aerosol environment presence are identified as the increase steepness in the interference signal and the fluctuations in the reflected signal amplitude with respect to the OED motion are low relative to the obstacle. The relationship between the OED detector threshold and the area depth of aerosol formations is established. The work results make it possible to form interference immunity methods from the aerosol formations effects.
Authors and Affiliations
V. I. Santoniy, I. A. Ivanchenko, L. M. Budiyanskaya
Keywords
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- EP ID EP398586
- DOI 10.18524/1815-7459.2017.2.106605
- Views 76
- Downloads 0
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