Low-altitude defense radar system and method based on digital beamforming technology

A radar system and digital beam technology, applied in the radar field, can solve the problems of weak aircraft photoelectric signal, small aircraft sound amplitude, and inconspicuous target infrared characteristics, and achieve the effect of improving airspace coverage.

Active Publication Date: 2022-01-18
中科宇达(北京)科技有限公司
View PDF23 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photoelectric detection is susceptible to interference from ambient light. The infrared characteristics of the target are not obvious when the cloud layer is thick or cloudy, and the contrast between the target and the background is low when the light is backlit. The noise ratio is low, which further increases the difficulty of photoelectric detection
Acoustic detection is greatly affected by the sound clutter in the environment, and the sound amplitude of "low, slow and small" aircraft is small, so the range of acoustic detection is not large
Radio signal detection adopts passive detection technology, affected by the position of radio emission signal, the detection accuracy of airspace in different positions will be quite different

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Low-altitude defense radar system and method based on digital beamforming technology
  • Low-altitude defense radar system and method based on digital beamforming technology
  • Low-altitude defense radar system and method based on digital beamforming technology

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0050] In a first exemplary embodiment of the present disclosure, a low-altitude defense radar system based on digital beamforming technology is provided.

[0051] figure 1 It is a compositional block diagram of a low-altitude defense radar system based on digital beamforming technology according to an embodiment of the present disclosure.

[0052] refer to figure 1 As shown, the low-altitude defense radar system based on digital beamforming (DBF) technology of the present disclosure includes: a radar host 1, a servo turntable 2 and a control module 5, wherein the radar host 1 includes: an active antenna module 11 for Transmitting broadband FM continuous wave signals and receiving echo signals at the same time; and digital module 12, used to control the scanning angle range and rotating speed of the transmitted signal parameters, received signal digital attenuation and servo turntable 2, and the received echo signals Perform DBF weighting processing to obtain multi-channel s...

no. 2 example

[0086] In a second exemplary embodiment of the present disclosure, a method for performing low-altitude defense based on any of the low-altitude defense radar systems mentioned in the present disclosure is provided.

[0087] Figure 5 It is a flow chart of using the low-altitude defense radar system based on the digital beamforming technology of the present disclosure. Figure 6 It is a flow chart of the low-altitude defense radar system based on the digital beamforming technology of the present disclosure for low-altitude defense.

[0088] to combine Figure 5 and Figure 6 As shown, the low-altitude defense method based on the low-altitude defense radar system of the present disclosure includes: after the entire radar system is powered on, configure the parameters of the radar host 1 and the servo turntable 2 through the control module 5; After it is turned on, the servo turntable 2 scans according to the configured rotation angle range and rotational speed; the radar hos...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A low-altitude defense radar system based on digital beamforming technology, including: a radar host, a servo turntable and a control module, wherein the radar host includes: an active antenna module for transmitting broadband FM continuous wave signals and echo signals simultaneously receiving; and a digital module, which is used to control the parameters of the transmitted signal, the digital attenuation of the received signal, and the scanning angle range and rotational speed of the servo turntable, and perform DBF weighted processing on the received echo signal to obtain a multi-channel and difference beam signal, and use The multi-channel sum-difference beam signal is combined with the scanning angle information at the time of signal acquisition for real-time processing to obtain the detection result. The sum-difference beam signal is a single pulse signal of sum-azimuth difference-pitch difference. The system can realize real-time monitoring of "low, slow and small" targets in a large area at the same time, and can measure the distance, angle, speed, etc. of the target with high precision, greatly improving the airspace coverage of the radar.

Description

technical field [0001] The disclosure belongs to the field of radar technology, and relates to a low-altitude defense radar system and method based on digital beamforming technology. Background technique [0002] "Low, slow and small" targets mainly include various types of unmanned aerial vehicles, aviation models, hot air balloons and other aircraft, with low-altitude flight (below 1000m), slow speed (less than 200km / h), miniaturization (radar cross-sectional area less than 2m) 2 )Characteristics. This kind of target is low in cost, easy to carry and easy to operate, which makes them low in take-off requirements and strong in take-off, making it difficult to find and deal with illegal flight operations, which is very easy to endanger national air defense security, social public safety, and personal and property safety. threatening. At present, every year, there are incidents of major safety problems caused by the illegal flight of drones and other "low, slow and small" t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/42G01S13/58G01S13/72
CPCG01S13/426G01S13/584G01S13/72
Inventor 董勇伟李毅之冀广宇
Owner 中科宇达(北京)科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products