Title:
VIBRATION DETECTION DEVICE OF EQUIPMENT IN THERMAL PLANT, AND ITS VIBRATION DETECTION METHOD
Document Type and Number:
Japanese Patent JP3477453
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent false signal generation from a vibration sensor for converting strain into an electric signal.
SOLUTION: This device has a vibration sensor 11 for converting strain into an electric signal, and an insulating inclusion 24 interposed between a temperature-variable external wall surface 25 of equipment forming a heat exchange system and the vibration sensor 11. The insulating inclusion 24 interrupts effectively conduction of the heat transmitted from the temperature- variable external wall surface 25 to the vibration sensor 11, and prevents effectively the vibration sensor 11 from generating an abnormal signal based on the thermal strain. It is definitely estimated that the abnormal signal is generated when the temperature fall between the heat-receiving surface of the vibration sensor and the surface on the opposite side is large, therefore, it is definitely estimated that generation of the abnormal signal can be surely avoided by lowering relatively the temperature of the vibration-receiving surface of the vibration sensor relative to the ambient temperature.
Inventors:
Tadashi Yoshida
Yorikata Mizoue
Masafumi Kuwahara
Yorikata Mizoue
Masafumi Kuwahara
Application Number:
JP2001079045A
Publication Date:
December 10, 2003
Filing Date:
March 19, 2001
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
Japan Atomic Energy Research Institute
Japan Atomic Energy Research Institute
International Classes:
G01H1/00; G01H11/08; (IPC1-7): G01H1/00; G01H11/08
Domestic Patent References:
| JP5965726A | ||||
| JP6415696A | ||||
| JP240521A | ||||
| JP5256688A | ||||
| JP8216230A | ||||
| JP8226989A | ||||
| JP10227686A | ||||
| JP11160295A | ||||
| JP586141B1 | ||||
| JP339621B2 | ||||
| JP444933B2 |
Other References:
【文献】特許2648288(JP,B2)
【文献】特許2862876(JP,B2)
【文献】HTTR原子炉施設の自動停止について(原因及び対策),日本原子力研究所,2000年 9月20日,URL,http://www.jaeri.go.jp/jpn/open/press/httr000920/index.html
【文献】特許2862876(JP,B2)
【文献】HTTR原子炉施設の自動停止について(原因及び対策),日本原子力研究所,2000年 9月20日,URL,http://www.jaeri.go.jp/jpn/open/press/httr000920/index.html
Attorney, Agent or Firm:
Minoru Kudo
Minoru Kudo (1 person outside)
Minoru Kudo (1 person outside)