Real-time distance and velocity measurement based on the dual-comb system

Abstract

With the development of laser metrology, the dual-comb system has natural superiority in the measuring fields. Specifically, distance and velocity represent a basic state for the target in space. We propose an application mode of the dual-comb interferometry integrated into the field programmable gate array. A high-speed parallel processor truly gives full play to the benefit of the data processing rate. The algorithm of the peak extraction and the address matching also bring an efficient working mode into the whole scheme. To verify the performance of this system, we devise a series of experiments for distance and velocity, respectively. The data processing rate of the distance is 425 Hz and that of the corresponding average velocity is 0.425 Hz, which is flexible for different measuring conditions. The experimental results show that the difference can be well within 252.8 µm at 5 m range and 284.9 µm/s over 0.5 m/s.

Study on model of laser interference on UAV detector

“…In 2021, Ma Changzheng and others from China Academy of Aerospace Electronics Technology [5] expounded the main key technologies of laser jamming anti-UAV system, simulated and calculated the blinding efficiency of laser, and summarized the possibility of applying airborne laser blinding technology to anti-UAV. In 2022, Shi Weijun from Beijing University of Chemical Technology [6] used the spot image information from the dual-source laser module collected by the camera to realize the ranging, and completed the construction of the experimental platform and parameter calibration verification.…”