Weak magnetic detection method

A technology of magnetic detection and weak magnetic sensor, which is applied in measuring devices, electrical/magnetic exploration, geophysical measurement, etc. It can solve the problems of high false alarm rate, inability to distinguish detection requirements, and inability to further analyze the size of the measured object. To achieve the effect of reducing the false positive rate

Active Publication Date: 2016-03-16
BEIJING HANGXING MACHINERY MFG CO LTD
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The security gate can detect ferromagnetic objects, permanent magnetic objects and current-passing equipment, but according to the technical principle and method of the patent, it can only trigger an alarm based on the maximum magnetic field strength, but cannot further analyze the size and shape of the

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
  • Weak magnetic detection method
  • Weak magnetic detection method
  • Weak magnetic detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a method capable of distinguishing ferromagnetic objects, smaller permanent magnets and electronic products with weak currents through the analysis of the weak magnetic field around the measured object. Further, judgments are made on information such as magnetic field characteristics, magnetic field strength, size, shape and position of the measured object, so as to distinguish measured objects with different magnetic field characteristics. The specific flow chart is shown in 1.

[0044]In order to achieve the above object, the present invention adopts the following technical solution: it includes a multi-point arrangement of magnetic field weakening sensors, and the measured object and the sensors generate relative motion.

[0045] When the person under test passes, if he carries a ferromagnetic object, a small permanent magnet or an electronic product with a weak current, the object under test will have a certain relative movement with the wea...

Embodiment 2

[0052] In view of the above problems, this embodiment provides a method capable of distinguishing ferromagnetic objects, smaller permanent magnets and electronic products with weak currents through the analysis of the weak magnetic field around the measured object. Further, judgments are made on information such as magnetic field characteristics, magnetic field strength, size, shape and position of the measured object, so as to distinguish measured objects with different magnetic field characteristics. The flowchart is shown in 1.

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 belongs to the technical field of article detection and specifically relates to a weak magnetic detection method which carries out detection by taking a weak magnetic field feature of a detected object as a basis. According to the technical scheme provided by the invention, the detected object can be distinguished according to concrete types comprising a human type, an eyeglass ornament type, a communication recording equipment type such as mobile phone earphones and the like, a key watch type, a controlled knife type and other types. Products further developed based on a basic principle of the method include yet are not confined to mobile phone detection doors, radiation-free metal safety check doors, package detectors, metal lossless flow detection devices and the like. On the basis that the type of the detected object is distinguished by use of the magnetic field feature of the detected object, the purpose of relevant detection is realized, and the rate of false alarm is substantially reduced.

Description

technical field [0001] The invention belongs to the technical field of object detection, and in particular relates to a weak magnetic detection method, which detects based on the weak magnetic field characteristics of the measured object. Background technique [0002] Ferromagnetic objects will be magnetized in the earth's magnetic field, and the magnetized objects will disturb the surrounding magnetic field. Smaller permanent magnets or electronic products with weak currents can also generate magnetic fields within a certain space. Under the condition that the size, shape and position of the measured object are unknown, the properties of the measured object cannot be simply judged only by the magnetic field strength at a certain point in space. When the measured object and the magnetic sensor move relative to each other, the magnetic field distribution of the measured object in space is detected and recorded, and the magnetic strength, size, shape and position information ...

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): G01V3/08
CPCG01V3/081
Inventor 丁洁何竞择徐圆飞刘晓超王俊峰廖继明温子宽
Owner BEIJING HANGXING MACHINERY MFG 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