Biological feature recognition system and biological feature recognition method

A biometric feature recognition and X-ray technology, applied in the field of non-destructive testing equipment, can solve problems affecting the accuracy of security checks, achieve quality evaluation, solve signal stacking, and improve spatial resolution

Pending Publication Date: 2021-08-10
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the existing X-ray security inspection equipment is inspected, the position of the sample on the conveyor belt is fixed and cannot be rotated 360°, so it can only take a two-dimensional projection image of the sample at a certain angle, and cannot take the CT of the sample to obtain its three-dimensional Structure, due to the problem of signal stacking in the two-dimensional projection map, it will affect the accuracy of security checks

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
  • Biological feature recognition system and biological feature recognition method
  • Biological feature recognition system and biological feature recognition method
  • Biological feature recognition system and biological feature recognition method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 1 As shown, the embodiment of the present invention provides a biological feature recognition system, which performs imaging detection on weakly absorbing biological samples based on X-ray phase contrast, including a sealed protective box 1, an X-ray detection device 2 and a control device 3, wherein the protection The box 1 is used to prevent the radiation of X-rays. The X-ray detection device 2 is placed in the protective box 1, including a base 21. A guide rail 211 is arranged on the base 21. On the guide rail 211, a first displacement stage is sequentially arranged along its length direction. 22. The second displacement platform 23 and the third displacement platform 24, the bottom of these three displacement platforms are all provided with sliders, and the sliders are slidingly matched with the guide rail 211 . Wherein, an X-ray tube 27 is installed on the first translation platform 22 , a sample turntable 25 is installed on the second translation p...

Embodiment 2

[0069] Such as Figure 8 As shown, this embodiment provides a biometric identification method, comprising the following steps:

[0070] S1: Build a biometric identification system of Embodiment 1, and place the sample to be detected on the sample holder 251 of the second translation stage 23 .

[0071] S2: Turn on the X-ray tube 27 and preheat it through the main controller 31 .

[0072] S3: Adjust the distance from the sample to the X-ray tube 27 and the distance from the detector 28 to the sample, and compare the two-dimensional projection images of the sample under different X-ray tube parameters to obtain the optimal contrast imaging condition.

[0073] Taking the biological sample walnut as an example, the optimal contrast imaging conditions are: the tube voltage is 80keV, the tube current is 100μA, the target power is 6.6W, the distance from the sample to the X-ray tube 27 is 135mm, and the distance from the sample to the detector 28 350mm,.

[0074] S4: Determine the p...

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 relates to a biological feature recognition system and a biological feature recognition method. The biological feature recognition system comprises an X-ray detection device and a control device, wherein the X-ray detection device is arranged in a sealed protection box and comprises a base, and a guide rail is arranged on the base; a first displacement table, a second displacement table and a third displacement table are sequentially arranged in the length direction of the guide rail in a sliding mode, an X-ray tube is arranged on the first displacement table, a sample rotary table is arranged on the second displacement table, and a detector is arranged on the third displacement table; the control device comprises a master controller and an X-ray generation control assembly, and the master controller is connected with the X-ray generation control assembly, the sample rotary table and the three displacement tables through cables or in a communication mode. According to the biological feature recognition system, the X-ray tube with the micron focus is adopted as a light source, and the X-ray beam with good spatial coherence is obtained, so imaging detection of a weak absorption biological sample based on phase contrast is realized, and the spatial resolution is improved.

Description

technical field [0001] The invention relates to the field of non-destructive testing equipment, and more particularly relates to a biological feature identification system and a biological feature identification method. Background technique [0002] National biosecurity is crucial to the protection of endangered animal and plant species and the entire ecosystem, and customs is the frontier of biosecurity protection. In recent years, China's import and export of animals and plants has increased year by year, domestic rare animal and plant resources are precious and scarce, and the task of protecting domestic rare animal and plant special biological resources has become increasingly arduous. [0003] Because X-rays have strong penetrability and can obtain internal structure information of samples such as insects and plants, X-ray-based security inspection equipment is widely used in major stations, ports, and airports. Such as Figure 11 As shown, the existing X-ray security ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04
CPCG01N23/04
Inventor 薛艳玲肖体乔陈荣昌许明伟李可杜国浩邓彪谢红兰
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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