Unlock instant, AI-driven research and patent intelligence for your innovation.

Measuring method and device of micro magnetic field

A measurement method and a technology of a measurement device, which are applied in the direction of measurement devices, magnetic variables, instruments, etc., can solve the problems of inability to guarantee the accuracy of measurement, high requirements for on-site operators, and great influence

Active Publication Date: 2018-06-05
韩小刚
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method and device for measuring a micro-magnetic field to solve the problem that in the prior art, the operation requirements for on-site operators are extremely high, and the accuracy of the measurement cannot be guaranteed due to the influence of human factors. Problems Affecting the Accuracy of Nondestructive Testing

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
  • Measuring method and device of micro magnetic field
  • Measuring method and device of micro magnetic field
  • Measuring method and device of micro magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is an implementation flow chart of a measurement method for a micro-magnetic field provided in Embodiment 1 of the present invention. This embodiment includes:

[0025] S101: According to a preset measurement period, obtain a sequence of magnetic field strengths at equal time intervals of the micro-magnetic field on the surface of the material detected by the sensor within a preset time period, wherein the preset time period is an integer multiple of the preset measurement period.

[0026] Among them, the sensor is used to detect the micro-magnetic field on the surface of the material (such as steel). The sensor can be a magnetic sensor. A high-strength weak magnetic material protective cover is installed outside the magnetic sensor to improve its wear resistance. Preferably, 7A75 aluminum is used Gold as a protective case. Among them, the preset measurement period can be set according to the size of the material and the measurement accuracy; the preset tim...

Embodiment 2

[0035] figure 2 It is an implementation flowchart of a micro-magnetic field measurement method provided by Embodiment 2 of the present invention. On the basis of the above-mentioned embodiments, this embodiment specifically includes:

[0036] S201: Acquire a sequence of magnetic field strengths at equal intervals of the micro-magnetic field on the surface of the material detected by the sensor within a preset time period according to a preset measurement period, wherein the preset time period is an integer multiple of the preset measurement period.

[0037] For example, let the default time period be T 1 , the preset measurement period is T 2 , then obtain the magnetic field intensity sequence at equal time intervals of the micro-magnetic field on the surface of the material detected by the sensor within the preset time period as an array G si , where the array G si There are n magnetic field strength values ​​in total, n=T 1 / T 2 .

[0038] Wherein, the last magnetic f...

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 a micro-magnetic field measurement method and device. The micro-magnetic field measurement method comprises steps of a magnetic field intensity sequence with equal time intervals of a micro-magnetic field on a surface of a material which is detected by a sensor in a preset period of time according to a preset measurement cycle, obtaining a distance value corresponding to each magnetic field intensity value in the magnetic field intensity sequence of equal time intervals, determining a corresponding relation between the magnetic field intensity sequence of the equal time intervals and a distance value, performing linear fitting on the corresponding relation between the magnetic field intensity sequence of the equal time intervals and the distance value to obtain a relation model of the micro-magnetic field intensity and the distance value, and combining with a preset distance interval parameter and the relation model to obtain a magnetic field intensity sequence of equal distance intervals of the micro-magnetic field. The micro-magnetic field measurement method and device can solve problems that the prior art has high requirements for operation of on-site staff, can be severely affected by artificial factors, cannot guarantee measurement accuracy and thus affect accuracy of lossless detection.

Description

technical field [0001] The invention belongs to the technical field of magnetic field measurement, and in particular relates to a method and device for measuring a micro-magnetic field. Background technique [0002] The surface of steel and other materials will have a micro-magnetic field in a natural state. Abnormalities in the interior and structure of the material will cause abnormal micro-magnetic fields on the surface. Therefore, non-destructive testing of the internal structure of materials can be achieved by measuring the micro-magnetic field on the surface of the material. [0003] At present, the existing method of measuring the micro-magnetic field on the surface of the material is mainly to use the sensor to collect the magnetic field intensity sequence of the material at equal time intervals, but what is needed in the nondestructive testing is the magnetic field intensity sequence at the equidistant interval. Speed ​​movement can realize the magnetic field intens...

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 Patents(China)
IPC IPC(8): G01R33/09
CPCG01R33/093G01R33/098
Inventor 韩小刚
Owner 韩小刚