Broadband LFM Continuous Millimeter Wave Signal Emitter for UAV Line Inspection and Obstacle Avoidance Radar

Abstract

The invention relates to a wide-band linear frequency modulation continuous millimeter-wave signal emitting source of a line patrol obstacle avoidance radar of an unmanned aerial vehicle. The output end of a constant temperature crystal oscillator is connected with a DDS reference signal source and a phase locked dielectric resonator oscillator, and the DDS reference signal source is connected with a control system; the DDS reference signal source is connected with a first filter, a phase locker, a low-pass filter, a voltage-controlled oscillator, a three-power distributor, a frequency multiplier, a first power amplifier and an antenna in sequence; the phase locked dielectric resonator oscillator is connected with a frequency mixer, the output of the frequency mixer is divided into two passages, and one passage is connected with a second filter, a first amplifier and the phase locker; the other passage is connected with the three-power distributor; the three-power distributor is further connected with a receiver to perform equal-energy power distribution; the frequency multiplier multiplies the received signal into 8-millimeter wave band signal, and the signal is emitted through the antenna after being amplified. The wide-band linear frequency modulation continuous millimeter-wave signal emitting source of the line patrol obstacle avoidance radar of the unmanned aerial vehicle is mainly used for a line patrol system of the unmanned aerial vehicle for a power transmission line, is capable of realizing the obstacle avoidance detection (the obstacle comprises a tower, the power transmission line and so on) for the unmanned aerial vehicle, and enables the detection target distance resolution ratio to be improved.

Description

technical field [0001] The invention belongs to the technical field of millimeter-wave radar detection, in particular to a wide-band linear frequency modulation continuous millimeter-wave signal emission source of a UAV-free line inspection and obstacle avoidance radar, which is suitable for avoidance detection of obstacles by an UAV inspection system of a power transmission line. Background technique [0002] The use of drones has been widely used in disaster prevention and mitigation of power systems and line inspections. It has realized functions such as power grid disaster monitoring, fast inspections, and hidden danger discovery. It has realized the integration of management and eliminated faults at the stage of hidden dangers. Improve the power transmission and distribution operation, management and maintenance level of the power system. However, at present, drones often have serious accidents caused by being hit by power transmission lines, woods, etc., and the probab...

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Problems solved by technology

In addition, when flying at ultra-low altitude, the ground will produce effects such as ground clutter, etc.

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