Amplitude calibrating method used for multi-probe near-field scattering imaging

A technology of amplitude calibration and scattering imaging, applied in geophysical measurement, instruments, etc., can solve the problem of inability to perform amplitude calibration, and achieve the effect of improving imaging accuracy

Inactive Publication Date: 2014-07-30
CHINA ELECTRONIS TECH INSTR CO LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of rod or spherical scatterers can only be used for phase calibration, which can eliminate the phase difference between the actual transceiver antenn...

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Amplitude calibrating method used for multi-probe near-field scattering imaging
  • Amplitude calibrating method used for multi-probe near-field scattering imaging
  • Amplitude calibrating method used for multi-probe near-field scattering imaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] in such as figure 1 In the multi-probe near-field imaging model shown, 101 is the transmitting antenna, 102 is the receiving antenna, the x and y directions are the azimuth direction, the z direction is the distance direction, the probe is located in the xy plane where z=0, and the target is located at z>0 the front half of the space.

[0026] like figure 2 As shown, the present invention is based on the principle of uniform reflection of a plane reflector, and uses a metal plate as a calibration object for amplitude calibration. Different from the phase calibration method, the theoretical distribution of near-field scattering cannot be obtained simply based on the phase delay when using a plate-shaped calibrator, and the present invention will use its imaging results for calibration. The imaging result of the metal plate is obtained as f bo (x, y), the image of the target to be measured is processed by the following formula 1 to complete the calibration. Formula o...

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

No PUM Login to view more

Abstract

The invention provides an amplitude calibrating method used for multi-probe near-field scattering imaging. The method includes the steps of (1) background scattering data are measured through a multi-probe detection system; (2) scattering data of a target to be measured are measured; (3) scattering data of a metal plate are measured; (4) background cancellation is carried out on the target to be measured to obtain scattering data, and imaging processing is carried out on the scattering data to obtain an imaging result; (5) background cancellation is carried out on the calibration metal plate to obtain scattering data, and imaging processing is carried out on the scattering data in an RMA algorithm to obtain an imaging result; (6) the imaging result is calibrated according to a first formula, and the calibrated imaging result of the target to be measured is obtained. According to the technical scheme, microwave / millimeter wave imaging azimuth amplitude calibration can be carried out, the amplitude calibrating method is mainly used for the multi-probe imaging system poor in amplitude precision, the imaging result is directly calibrated through a simple calibration element, and imaging precision is improved.

Description

technical field [0001] The invention belongs to the technical field of amplitude calibration of multi-probe near-field scattering imaging, and in particular relates to an amplitude calibration method for multi-probe near-field scattering imaging. Background technique [0002] Multi-probe near-field scattering imaging technology avoids the long-term data acquisition process caused by mechanical movement in scanning imaging, improves the real-time performance of microwave and millimeter wave imaging, and has broad application prospects in the fields of security inspection, non-destructive flaw detection, and target scattering characteristic distribution testing. . Range Migration Algorithm (RMA) is a commonly used imaging algorithm in synthetic aperture radar technology. However, when the RMA algorithm is used for multi-probe system imaging, the target imaging with the same scattering intensity, in the azimuth direction, the center position of the imaging area and the edge pos...

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
no application Login to view more
IPC IPC(8): G01V13/00
Inventor 杜刘革胡大海常庆功王亚海刘伟周杨颜振
Owner CHINA ELECTRONIS TECH INSTR CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap