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

A chirp, unmanned aerial vehicle technology, applied in the direction of reflection/re-radiation of radio waves, radio wave measurement systems, utilization of re-radiation, etc.

Active Publication Date: 2017-01-18
STATE GRID INTELLIGENCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] like figure 1 As shown, a radar signal transmitter of an 8mm-band obstacle avoidance radar includes a constant temperature crystal oscillator, a DDS reference signal source, a first filter, a phase-locked dielectric oscillator (PLDRO), a mixer, a second filter, a first An amplifier, a phase locker, a low pass filter (LPF), a voltage controlled oscillator (VCO), three power dividers, a frequency multiplier, a first power amplifier and an antenna. The DDS reference signal source is connected with the control system, and the three power dividers are connected with the receiver.

[0032] The two outputs of the constant temperature crystal oscillator are respectively connected to the input ends of the phase-locked dielectric oscillator (PLDRO) and the DDS reference signal source, and the output of the DDS reference signal source is filtered...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/282G01S13/93
CPCG01S7/35G01S13/32G01S13/93
Inventor 郑天茹刘俍张晶晶张明江王万国魏传虎慕世友任杰傅孟潮郭玉泉
Owner STATE GRID INTELLIGENCE TECH CO LTD
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