发明名称 |
Leak detecting method for vessels. |
摘要 |
<p>A leak detecting method for vessels in which a gas of a given pressure is mixed with sulfur hexafluoride of a given partial pressure and the mixture is introduced into a vessel, and a gas in the vicinity of an outer peripheral surface of the vessel is sucked by a gas sucking mechanism. According to one form of the invention, the sucked air is introduced into an absorption cell (5) and a P(16)-line laser light of a carbon dioxide gas laser is introduced into the absorption cell (5). Then, the presence or absence of absorption of the P(16)-line laser light within the absorption cell is detected in accordance with a change in the transmitted light intensity of the P(16)-line laser light and the presence or absence of a leak in the pressure vessel (1) is discriminated in accordance with a result of the detection. In accordance with another form of the invention the sucked air is introduced into a multiple reflection absorption cell and a P(16)-line laser light of a carbon dioxide gas laser and a reference light slightly different in wavelength from the P(16)-line laser light are introduced into the multiple reflection absorption cell. Then, the presence or absence of absorption of the P(16)-line laser light within the multiple reflection absorption cell is detected in accordance with a change in a light intensity ratio between the reflected lights of the P(16)-line laser light and the reference light, and the presence or absence of a leak in the pressure vessel is discriminated in accordance with a result of the detection. <IMAGE></p> |
申请公布号 |
EP0470366(A2) |
申请公布日期 |
1992.02.12 |
申请号 |
EP19910110993 |
申请日期 |
1991.07.03 |
申请人 |
ASAI, KAZUHIRO;NKK CORPORATION;DAIKIN INDUSTRIES, LIMITED |
发明人 |
ASAI, KAZAHIRO;MORIMOTO, SHIGERU;OMORI, HIROSHI;ISHIHARA, KOJI |
分类号 |
G01M3/22 |
主分类号 |
G01M3/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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