A tomography imager

A tomography and imager technology, applied in the field of radar remote sensing, can solve the problems of difficulty in target detection, influence, and difficulty to eliminate, and achieve the effect of high resolution and high spatial resolution

Active Publication Date: 2020-01-17
郭伟 +1
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  • Claims
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Problems solved by technology

[0003] Due to the use of coherent detection technology based on shock pulse signal and frequency-modulated continuous wave signal in the existing technology, the echo signal is continuous and coherent, so it is always affected by various clutter
Clutter is usually very strong, and it is difficult to eliminate as the position changes, making target detection difficult
Almost all existing means are difficult to get rid of the above effects

Method used

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  • A tomography imager
  • A tomography imager

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Embodiment Construction

[0071] The tomography scanner of the present invention, due to the adoption of a new signal system, its natural clutter suppression characteristics make the clutter cancel rapidly in the target detection, highlighting the echo from the target, and its ultra-wideband characteristics have Extremely high spatial resolution, providing high-resolution and high-quality images of internal structures through correlation detection and interferometric imaging. The time-only correlation of ordered cloud signals is fundamentally different from the time-continuous correlation of the existing technology, and provides high-resolution tomographic capabilities, enabling detection to be imaged layer by layer like CT images and to eliminate clutter layer by layer. It can provide high-resolution tomographic images for various underground buried objects including underground pipe networks, and the detection is stable and reliable.

[0072] The present invention will be described in detail below in...

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Abstract

The invention provides a tomographic scanning imager. The tomographic scanning imager comprises an infinitive state machine ordered cloud signal generator, a radio frequency emission module (2), a switch combination module (3), a receiving module and a correlation interference imaging processing module (8), wherein the infinitive state machine ordered cloud signal generator generates two ordered cloud signals, namely a first branch ordered cloud signal and a second branch ordered cloud signal; the radio frequency emission module (2) is used for receiving the first branch ordered cloud signal and transforming the first branch ordered cloud signal into radio frequency to be emitted out; the switch combination module (3) is used for controlling a working time sequence of the receiving module,eliminating clutter of the ordered cloud signals and outputting the ordered cloud signals to the receiving module; the receiving module is used for performing delay and gain processing on the orderedcloud signals, and the processed signals are output to the correlation interference imaging processing module (8); and the correlation interference imaging processing module (8) performs AD transformation, clutter cancellation and correlation interference processing on the ordered cloud signals obtained after delay and gain processing, so that tomographic imaging of a detection target is completed.

Description

technical field [0001] The invention relates to the technical field of radar remote sensing, in particular to a tomographic scanning imager. Background technique [0002] The tomography scanner is a non-destructive detection instrument for detecting subsurface structures. It uses the penetration ability of electromagnetic waves to the surface to emit electromagnetic waves carrying ordered cloud signals from the surface to the interior. The electromagnetic waves are scattered on the interface where the properties of the medium change. By receiving the scattered echo signal, according to its time delay, shape and spectrum characteristics and other parameters, the target position, medium structure and properties are interpreted, and on the basis of data processing, the image recovery and reconstruction technology is applied to scan and image the target processing, in order to achieve a true and intuitive reproduction of the subsurface target. [0003] Because the existing tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/12G01S7/41G01S13/89
CPCG01S7/414G01S13/89G01V3/12
Inventor 郭伟王彩云
Owner 郭伟
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