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Active and passive imaging detection system and method

A technology of active detection and detection system, which is applied in the field of target detection and composite detection, and can solve problems such as limiting the application of passive microwave imaging technology.

Pending Publication Date: 2022-06-28
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

These deficiencies limit the application of passive microwave imaging techniques

Method used

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  • Active and passive imaging detection system and method
  • Active and passive imaging detection system and method
  • Active and passive imaging detection system and method

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Embodiment Construction

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0043] Embodiments of the present invention provide an active and passive imaging detection system, figure 1 A schematic diagram of an active and passive imaging detection system according to an embodiment of the present invention is schematically shown.

[0044] like figure 1 As shown, the active and passive imaging detection system includes: an active detection sub-system and a passive microwave imaging sub-system.

[0045] In some embodiments of the present invention, the active detection sub-system works in the millimeter waveband and is used for generating radio frequency power signals, including: an active signal processing sub-system for generating an intermediate frequency transmission signal...

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Abstract

The invention discloses an active and passive imaging detection system, which comprises an active detection subsystem used for generating a radio frequency power signal, and comprises an active signal processing extension set used for generating an intermediate frequency emission signal; the active frequency conversion extension set is connected with the active signal processing extension set and is used for carrying out up-conversion processing on the intermediate frequency emission signal to obtain a radio frequency emission signal; the active radio frequency front-end extension set is connected with the active frequency conversion extension set and is used for carrying out power amplification on the radio frequency emission signal to obtain a radio frequency power signal; the active detection antenna is used for performing directional radiation on a target by using the radio frequency power signal; the passive microwave imaging subsystem comprises a receiving array antenna used for receiving a microwave radio frequency signal reflected by a target; the passive receiver extension set is used for performing down-conversion processing on the microwave radio-frequency signal to obtain an intermediate-frequency radiation signal; and the passive imaging processing extension set is used for carrying out high-speed sampling and imaging processing on the intermediate-frequency radiation signal.

Description

technical field [0001] The invention relates to the technical field of target detection and composite detection, in particular to an active and passive imaging detection system and method. Background technique [0002] Passive microwave radiation imaging is a kind of microwave imaging, which uses a microwave radiometer to detect and receive the electromagnetic radiation of the measured target and the background in the microwave band, and visually display the received radiation signal in a pseudo-color image in proportion. According to the thermal radiation theory, any object with a temperature above absolute zero has electromagnetic radiation, and the brightness temperature is usually used to characterize the radiation intensity of the object, which depends on the geometric and dielectric properties of the object itself. Compared with infrared and optical detectors, passive microwave imaging has the ability to work around the clock and all-weather. Based on the interaction b...

Claims

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Application Information

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IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 张卫杰赵泽平刘建国
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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