Title:
MAGNETOCHROMISM DETECTION DEVICE AND METHOD FOR CRACK IN STEEL STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2017/219762
Kind Code:
A1
Abstract:
A magnetochromism detection device and method for a crack in steel structure. The device comprises magnetic suspension liquid, a magnetization device, a high-speed digital camera (6), an image processing module (7), a data processing module (8), an input button (9), a liquid-crystal display panel (10) and a power source and data output interface (11); the magnetic suspension liquid comprises magnetic iron oxide powders, Fe3O4 nanoparticles and an oily base liquid; the method comprises the high-speed digital camera (6) taking photos during detection, and looking for the time at which the leakage magnetic field intensity reaches the maximum, recording and calculating a crack position and a propagation direction. This invention achieves the automatic determination and recording of the crack images and parameters such as position and direction, and can eliminate the interference of false indication.
Inventors:
JI BOHAI (CN)
FU ZHONGQIU (CN)
YUANG ZHOUZHIYUAN (CN)
LIU TIANJIA (CN)
FU ZHONGQIU (CN)
YUANG ZHOUZHIYUAN (CN)
LIU TIANJIA (CN)
Application Number:
PCT/CN2017/082557
Publication Date:
December 28, 2017
Filing Date:
April 28, 2017
Export Citation:
Assignee:
UNIV HOHAI (CN)
International Classes:
G01N27/84
Foreign References:
| CN106053594A | 2016-10-26 | |||
| CN101435797A | 2009-05-20 | |||
| CN102109584B | 2013-10-23 | |||
| JPH0650941A | 1994-02-25 | |||
| CN202171584U | 2012-03-21 |
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM(ORDINARY PARTNERSHIP) (CN)
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