Title:
BOILER TUBE LEAKAGE INSPECTION METHOD AND DEVICE THEREOF
Document Type and Number:
Japanese Patent JP2512657
Kind Code:
B2
Abstract:
PURPOSE: To make it possible to detect a tube leakage with high accuracy by frequency-analyzing data of furnace wall vibration based on the sound of steam and hot water ejected from the tube.
CONSTITUTION: A CPU 23 measures each steady data transmitted from each vibration sensor 6 in terms of the whole 24 channels when a boiler is operating in a normal fashion and stores the vibration data as 3M word digital data in a memory circuit 21. Then, a boiler tube leakage is measured and vibration data thus similarly obtained is stored in the memory circuit 21. After the measurement is over, the measurement data is frequency-analyzed by a frequency analysis circuit one after another. The data is compared with the previously measured steady data of the channels and the changed portion data is stored in a disk file device 24. Then, fuzzy processing is carried out based on the changed portion data. This construction makes it possible to eliminate the need for sensibility correction per sensor.
Inventors:
NAKAJIMA HIROYUKI
NAKAJIMA EISAKU
NOMURA KAZUTOSHI
NAKAJIMA EISAKU
NOMURA KAZUTOSHI
Application Number:
JP481492A
Publication Date:
July 03, 1996
Filing Date:
January 14, 1992
Export Citation:
Assignee:
KYUSHU DENRYOKU KK
KYUSHU KEISOKUKI KK
KYUSHU KEISOKUKI KK
International Classes:
F22B37/42; F22B37/38; (IPC1-7): F22B37/42
Domestic Patent References:
| JP61153539A | ||||
| JP4212163B1 | ||||
| JP4214401B1 |
Attorney, Agent or Firm:
Nobuyuki Fujii