Title:
GATE DETECTION ROBOT BASED ON GIANT MAGNETORESISTANCE ELEMENT AND DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/073407
Kind Code:
A1
Abstract:
Disclosed is a gate detection robot based on giant magnetoresistance element, comprising a detection mechanism; arranged at the bottom of the support (1); and a controller, a range-based localization module and a magnetic flaw detection sensor based on giant magnetoresistance element arranged on the support (1); the magnetic flaw detection sensor comprises an excitation mechanism, a giant magnetic sensor (9) and two magnetic concentrators (8). During detection, a magnetic field is used as a medium; the excitation mechanism magnetizes the gate; when the surface of the gate has a defect, the magnetic conductivity of the local area is reduced and the magnetic resistance is increased so that magnetic lines are distorted and diffused outside the gate to form a detectable leakage magnetic field signal; the signal is transmitted to a controller, and the controller can obtain the specific location of the detection robot, i.e., the specific location of the defect, according to the data measured by two ultrasonic wave sensors, and then transmits the defect information and the defect location information to an upper computer. The detection result has high precision and good stability. Further disclosed is a detection method for the gate detection robot based on giant magnetoresistance element.
Inventors:
CHEN DA (CN)
LOU BAODONG (CN)
ZHAO YAZHOU (CN)
LIAO YINGDI (CN)
HOU LIJUN (CN)
LOU BAODONG (CN)
ZHAO YAZHOU (CN)
LIAO YINGDI (CN)
HOU LIJUN (CN)
Application Number:
PCT/CN2018/114767
Publication Date:
April 16, 2020
Filing Date:
November 09, 2018
Export Citation:
Assignee:
UNIV HOHAI (CN)
International Classes:
G01N27/83; G01M3/16; G01M3/28
Foreign References:
| CN203324225U | 2013-12-04 | |||
| CN102564707A | 2012-07-11 | |||
| US3778613A | 1973-12-11 | |||
| US20100281953A1 | 2010-11-11 | |||
| CN102706955A | 2012-10-03 | |||
| CN103175663A | 2013-06-26 | |||
| CN206097408U | 2017-04-12 |
Attorney, Agent or Firm:
NANJING ZONGHENG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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