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Doppler wind finding radar system and method based on continuous laser

A technology of Doppler wind measurement and radar system, which is applied in the field of Doppler wind measurement radar system based on continuous laser, and can solve problems such as inability to measure blind areas

Pending Publication Date: 2021-09-14
重庆两江卫星移动通信有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The pulse laser wind measurement radar obtains the distance of the scattered signal position relative to the radar system by calculating the sending and receiving delay time of the pulse laser. Due to the different pulse width and range gate settings, the pulse laser wind measurement radar may have tens to A blind area of ​​several hundred meters, the blind area between tens and hundreds of meters in the detection direction of the radar system cannot be measured by pulsed laser

Method used

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  • Doppler wind finding radar system and method based on continuous laser
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  • Doppler wind finding radar system and method based on continuous laser

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Embodiment 1

[0044] This embodiment discloses a Doppler wind radar system based on continuous laser, such as figure 1 As shown, it includes continuous fiber laser module, optical path control and transceiver module, balance detection module and signal processing module;

[0045] The continuous fiber laser module provides a narrow line width continuous laser signal with a certain power, which is used as the detection signal light and local oscillator light of the radar. The detection signal light is emitted into the atmosphere to be measured through the optical path control and transceiver module, and the local oscillator light enters the balance detection module. Afterwards, the detection signal enters the balance detection module after the backscattering signal of atmospheric aerosol particles is received by the optical path control and transceiver module, and is mixed with the local oscillator light, and the mixed optical signal is converted into an electrical signal; the signal The proc...

Embodiment 2

[0069] This embodiment discloses a Doppler wind measurement method based on continuous laser. The wind measurement method adopts a Doppler wind measurement radar system based on continuous laser provided in the first embodiment. Before the measurement, the radar system is calibrated. The calibration method is to build a test link according to the principle block diagram; turn on the seed source laser and adjust its output power between 30mW and 40mW; start the acousto-optic modulator, fiber amplifier, and balance detector and the board; the acousto-optic modulator shifts the frequency of the seed source laser, and the frequency shift is 80MHz; adjusts the optical amplifier so that the output optical power is 200mW; adjusts the focusing distance of the telescope beam to 10m, and places the rotation to be measured at the beam focusing position The turntable, the turntable is controlled by an AC servo motor, the speed accuracy error is 0.5RPM, and the radius of the turntable is 13...

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Abstract

The invention discloses a Doppler wind finding radar system and method based on continuous laser, a continuous fiber laser module generates detection signal light and local oscillation light, the detection signal light is inputted into a light path control and transmit-receive module, and the local oscillation light is inputted into a balance detection module; the light path control and transmit-receive module emits the detection signal light to the atmosphere to be observed, receives the back scattering echo signal light, and inputs the back scattering echo signal light to the balance detection module; the balance detection module converts the signal light into a Doppler frequency shift electric signal; and the signal processing module processes the electric signal to obtain the visual wind speed information. The system is advantaged in that measurement of high-speed resolution and range resolution in a middle and close range in the detection direction of a radar system is realized, and assembly and debugging of the system are facilitated; the requirement on the output power of the laser module is lower so that the laser is lower in power consumption and higher in reliability; the wind finding radar system is wide in adaptability and can be used in various environments and functions.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a continuous laser-based Doppler wind radar system and method. Background technique [0002] Atmospheric wind field detection is an important part of the meteorological field, and wind has an important impact on human activities. In the field of aerospace, meteorological monitoring and forecasting are important factors to ensure flight safety. Accurately and quickly updating airspace wind field information and reflecting relevant data to pilots are of great help to flight safety; in the field of wind power generation, for To develop wind energy more efficiently and safely, real-time wind field detection data is needed to control the operation status of wind power generation equipment; in the military field, wind field detection can provide an important guarantee for the safe use and precise strike of ground-to-air, air-to-air, and air-to-ground weapons. Meteorological suppor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95G01S7/481
CPCG01S17/95G01S7/481Y02A90/10
Inventor 杨吴昊郭大猛毛盛乾许峻文王茂宇王帅
Owner 重庆两江卫星移动通信有限公司
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