Abstract
Atmospheric aerosol backscattering is a main factor that affects the ranging accuracy of laser ranging in the fog. The influence on a target-reflected signal in incoherent frequency modulation continuous-wave (FMCW) laser ranging system, which has not yet been well addressed, has been theoretically and experimentally studied in this paper. In order to accurately analyze the signal-to-noise ratio (SNR) of an echo signal in backscattering environment, a quantitative calculation model based on Mie theory is presented. To confirm the validity of this model, a FMCW laser ranging prototype with small size, low power consumption and high ranging accuracy was designed. The laser ranging experiment considered a wide range of the affecting parameters. Experimental results confirm that the calculated SNR of the echo signal based on the quantitative calculation model is identical to the experiment results within acceptable error. Therefore, the quantitative calculation model coupled with the prototype provides an effective way to study the influence of aerosol backscattering on laser ranging in the fog.
| Original language | English |
|---|---|
| Pages (from-to) | 15-21 |
| Number of pages | 7 |
| Journal | Engineering Letters |
| Volume | 25 |
| Issue number | 1 |
| Publication status | Published - 22 Feb 2017 |
Keywords
- Aerosols
- Backscattering
- Frequency modulation continuous-wave (FMCW)
- Laser ranging