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Spliced sparse planar array millimeter wave imaging device and method

A technology of millimeter-wave imaging and planar array, which is applied in measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc. It can solve the problems of high hardware cost and large number of switching antenna receiving and receiving elements.

Active Publication Date: 2020-09-25
湖南雷远电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the biggest problem of the existing array millimeter-wave imaging device is the number of switching antennas and the number of receiving and transmitting array elements, and the high hardware cost, the present invention proposes a spliced ​​sparse planar array millimeter-wave imaging device and method

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  • Spliced sparse planar array millimeter wave imaging device and method
  • Spliced sparse planar array millimeter wave imaging device and method
  • Spliced sparse planar array millimeter wave imaging device and method

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Embodiment 1

[0046] refer to Figure 1 to Figure 3 , this embodiment provides a spliced ​​sparse planar array millimeter-wave imaging device, including: a millimeter-wave frequency sweep source 1, a frequency multiplication link 2, a transceiver component 4, an electronic switch array 3, and a one-dimensional four-transmit and eight-receive sparse array antenna 11. Grating ruler 8, servo motor 14, horizontal guide rail 9, vertical guide rail 10, data acquisition card 5, data processor 6 and display 7.

[0047] Millimeter-wave frequency sweep source 1 generates 17-20GHz linear frequency-modulated millimeter-wave signal, and transmits the broadband signal after frequency doubling link 2 composed of two frequency doublers to transceiver component 4, which includes power divider, power Amplifiers, low noise amplifiers and mixers, the transfer process is as figure 2 shown. The power splitter divides the millimeter wave signal into two paths, one path is transmitted to the power amplifier, an...

Embodiment 2

[0053] Based on the spliced ​​sparse planar array millimeter-wave imaging device provided in Embodiment 1, this embodiment provides a spliced ​​sparse planar array millimeter-wave imaging method:

[0054] S1: The one-dimensional sparse array antenna starts scanning movement. At each scanning position point in the one-dimensional sparse array antenna scanning movement, the transmitting array element antenna is switched by an electronic switch to sequentially transmit millimeter-wave signals. When a transmitting array element antenna is working, it is in the receiving state at the same time, and the echo signals of n sparse planar sub-arrays are recorded after the entire scanning movement is completed.

[0055] S2: At any scanning position point during the scanning motion of the one-dimensional sparse array antenna, the corresponding radar echo signal model is constructed for any transmitting element antenna of the one-dimensional sparse array antenna as follows:

[0056]

[...

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Abstract

The invention provides a spliced sparse planar array millimeter wave imaging device and method. According to the method, millimeter wave signals are transmitted to a one-dimensional sparse array antenna through a transceiving unit while the transceiving unit receives target echo signals and transmits the target echo signals to a data processing unit; the one-dimensional sparse array antenna is arranged on a two-dimensional moving assembly, and movement in the horizontal direction and the vertical direction is performed through the two-dimensional moving assembly to complete zigzag scanning motion and obtain echo signals of n sparse planar sub-arrays; the two-dimensional moving assembly is provided with a coordinate recording module for recording the position coordinate information of the one-dimensional sparse array antenna in real time and outputting the position coordinate information to the data processing unit; and the data processing unit performs target imaging according to the echo signals from the transceiving unit and the position coordinate information of the one-dimensional sparse array antenna from the coordinate recording module, and splices the imaging results of then sparse planar sub-arrays to obtain a final target imaging result. According to the invention, the hardware cost of the system is greatly reduced while the imaging quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of millimeter-wave radar systems and radar signal processing, and in particular relates to a spliced ​​sparse planar array millimeter-wave imaging device and method. Background technique [0002] The existing arrayed millimeter-wave imaging device uses a one-dimensional uniform quasi-single-station line array to perform plane scanning and cylindrical scanning to image the target. The transceiver channels of the uniform quasi-single station line array are uniformly distributed, requiring a large number of electronic switches and transceiver elements. [0003] In order to reduce the number of array elements, a sparse coprime array is proposed in [Sparse Multi-Static Arrays for Near-FieldMillimeter-Wave Imaging]. There is a certain integer ratio between the number of transmitting array elements and the number of receiving array elements. The imaging quality comparable to that of a uniformly distributed linear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/89G01S7/41
CPCG01S7/41G01S13/89
Inventor 柴进李楚军秦明英洪青宇
Owner 湖南雷远电子科技有限公司