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- 1445570
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- 小时
- 注册时间
- 2020-2-24
- 最后登录
- 1970-1-1
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P1:magnetic flux leakage method : magnetic field on the walls of pipe. when pipe wall changes—> magnetic flux leaks thru & sensor detect.
- the location & amount of leakage = site & size of the flaw
P2:
- VKV: + hard&software to improve flaw detection method using EMAT
-EMAT no contact w pipeline: ultrasonic shear wave & measure the amount of sound energy reflected from & transmitted thru
- location & size of each flaw be determined
P3:
-TT: method to detect tiny leaks of gas using mircrocantilever tech = microscope diving board vibrate at a rate
-no leak—> vibrate = air current
-leak—> frequency change
-microcantilever mounted on EMAT: detect leak & flaw
flux 不断的变动
induce 诱导
magnetic field 磁場
microcantilever微悬臂
cantilever悬臂
transducer传感器
pipeline管道
mount安裝
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