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Terahertz safety check imaging system based on vector network analyzer

A technology of vector network analysis and imaging system, applied in the field of security inspection, to achieve the effect of clear and accurate three-dimensional imaging, improved efficiency and low hardware cost

Inactive Publication Date: 2016-09-28
INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

[0005] The present invention aims to provide a terahertz three-dimensional imaging system applied in the field of security inspection. The system is based on an X-band vector network analyzer, which effectively solves the contradiction between device cost and imaging effect of the existing terahertz security inspection system.

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  • Terahertz safety check imaging system based on vector network analyzer
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  • Terahertz safety check imaging system based on vector network analyzer

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Embodiment Construction

[0035] The invention is based on the construction of a vector network analyzer, and uses the terahertz SAR imaging technology to realize the detection of parcels and hidden objects of the human body. The basic composition of the present invention is as figure 1 As shown, it mainly includes four parts: signal generation and acquisition device, analog front end, scanning drive device, signal and data processing device.

[0036] The signal generating and collecting device is implemented by a vector network analyzer. The signal generation and collection work of the present invention is completed by a vector network analyzer. As a signal generating device, the vector network analyzer is used to generate a step frequency signal of the X-band with a specified bandwidth; at the same time, as a signal acquisition device, the vector network analyzer is used to convert the analog signal output by the analog front end of the security inspection system into a digital signal .

[0037] T...

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Abstract

The invention discloses a terahertz security imaging system based on a vector network analyzer, which includes a signal generation and acquisition device, an analog front end, a scanning drive device, a signal and data processing device; the vector network analyzer is used as the signal generation and acquisition device, Through the analog front-end, the step frequency signal of the X-band is up-converted to the terahertz band to radiate to the space to be inspected, and then the target echo signal of the terahertz-band is down-converted to the X-band through the analog front-end for signal processing; the main control computer is used for signal processing. The scanning drive device, signal and data processing device are controlled, and the user can adjust the corresponding scanning parameters according to the actual situation to achieve optimal detection, which improves the efficiency of the security inspection system; Such substances have good penetrability, and can effectively detect hidden items in packages and human clothing, with high resolution and accuracy.

Description

technical field [0001] The invention belongs to the technical field of security inspection, and in particular relates to a terahertz three-dimensional security inspection imaging system based on an X-band vector network analyzer. technical background [0002] Traditional security inspection technology is limited by harmlessness to the human body and privacy protection of the inspected, so it is often difficult to achieve reliable detection of the human body and its luggage. As the international anti-terrorism situation becomes more and more severe, while improving the efficiency of traditional security inspection techniques, it is necessary to develop a new system of security inspection systems to achieve more effective detection. [0003] Terahertz (THz) waves usually refer to electromagnetic waves with frequencies ranging from 100 GHz to 10 THz, which are in the transition frequency band from electronics to optics. Terahertz waves have good penetrability to many non-polar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V8/10
CPCG01V8/10
Inventor 赵宇姣刘杰邓贤进成彬彬汪朝晖
Owner INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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