thz scanning imaging system and method based on fmcw system
A scanning imaging and system technology, applied in the microwave field, can solve the problems of narrow scanning frequency band and cannot meet high resolution, achieve high scanning speed, solve the problem of microwave imaging measurement accuracy, and improve imaging resolution.
Active Publication Date: 2018-12-11
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In order to ensure the scanning speed, the frequency modulated continuous wave (FMCW) mode is required, but the existing FMCW system has a narrow scanning frequency band and cannot meet the requirements of high resolution
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0042] Compared with the FMCW system, the traditional step scan takes too long to scan. In order to ensure the scanning speed, the frequency modulated continuous wave (FMCW) mode is adopted. However, the existing FMCW system has a narrow scanning frequency band and cannot meet the requirements of high resolution.
[0043] The present invention proposes a THz scanning imaging system based on the FMCW system, using the 1mm band (170GHz-220GHz) bandwidth, the system...
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
Login to View More Abstract
The present invention proposes a THz scanning imaging system based on the FMCW system, including: a data acquisition and processing subsystem, a millimeter wave FMCW transceiver module, a scanning shelf system and a main control computer; the millimeter wave FMCW transceiver module is under the control of the system, According to the set start and stop frequency and scan rate, the frequency sweep source generates a microwave scan signal and sends it to the millimeter wave front-end module; the main control computer controls the scan shelf system to scan in the scan plane according to preset rules, and obtains The target echo data at different positions on the entire scanning plane; the system software obtains the three-dimensional image of the target through compensation and processing operations, and completes the test process. The invention extends the three-dimensional imaging of the FMCW system to the frequency range of 170GHz-220GHz, has better imaging resolution, and can effectively solve the problem of microwave imaging measurement accuracy.
Description
technical field [0001] The invention relates to the field of microwaves, in particular to a THz scanning imaging system, and also to a THz scanning imaging method. Background technique [0002] Microwave 3D imaging technology realizes 3D imaging by scanning specific targets with microwaves at different positions and performing response processing. For microwave imaging, frequency and band width will affect imaging resolution. Under the existing 10G-40G conditions, the resolution is difficult to achieve high precision, and the step scan also restricts the scan speed. [0003] Terahertz (THz) waves are between infrared and millimeter waves, and have unique radiation characteristics. High frequency and wide frequency band make high resolution possible. Its imaging technology is regarded as a new imaging method. , High-tech attack and defense, information countermeasures, automatic navigation, target search and tracking and other technologies have been paid more and more atten...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/89
CPCG01S17/02
Inventor 刘伟王亚海颜振常庆功周杨胡大海杜刘革
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP