Target signal processing device of unmanned aerial vehicle evadible system and unmanned aerial vehicle evadible system

Abstract

The invention relates to a target signal processing device of an unmanned aerial vehicle evadible system. The target signal processing device comprises a radio frequency receiving-transmitting system, an analog-digital converter, an FFT conversion module, a modulus circuit, a non-phase-coherent accumulation instrument and a CFAR detection circuit, wherein the radio frequency receiving-transmitting system is used for transmitting radio frequency signals to a target, receiving scattered echo signals, and mixing the echo signals with radio frequency signals to obtain beating signals; the analog-digital converter is used for conducting analog-digital conversion on the beating signals to obtain digital signals; the FFT conversion module is used for conducting fast Fourier transformation on the digital signals to obtain spectrograms, processing the spectrograms to obtain frequency values corresponding to peak points, and obtaining initial target distance signals; the modulus circuit is used for conducting modulus on the initial target distance signals to obtain signal amplitude values; the non-phase-coherent accumulation instrument is used for conducting non-phase-coherent accumulation on the signal amplitude values to obtain non-phase-coherent accumulation data; the CFAR detection circuit is used for detecting the non-phase-coherent accumulation data with a constant false alarm detection method to obtain target distance signals. The invention further provides the unmanned aerial vehicle evadible system. By means of the target signal processing device and the unmanned aerial vehicle evadible system, the target signal obtaining accuracy rate is improved, and the sizes of the device and the system are reduced.

Description

technical field [0001] The invention relates to the technical field of UAV obstacle avoidance, in particular to a target signal processing device of an UAV obstacle avoidance system and an UAV obstacle avoidance system. Background technique [0002] Overhead power lines cover a wide area and pass through complex terrain. Some areas still have problems with harsh environmental conditions. Power lines and towers have been exposed in the wild for a long time. Under the constant influence of external factors, they are prone to failures such as broken strands, corrosion, and tilting of towers. In order to grasp the operation status of the line in time and eliminate the potential safety hazards in the line in time, the electric power department spends huge manpower and material resources on line inspection every year. The development of UAV technology provides a new mobile platform for the inspection of overhead power lines. For the sake of flight safety, the UAV obstacle avoidanc...

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a target signal processing device for a UAV obstacle avoidance system and a UAV obstacle avoidance system for the problems of large device size and large error in obtaining target distance signals.

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