Patent ID: 9074962
Filing Date: 2015-07-07
Classification: G01M,G01N

Abstract:
1. A liquid leakage detector comprising: a first liquid detection unit provided at a member to be detected, the first liquid detection unit being configured to detect a liquid leaked from the member to be detected; a liquid impermeable member which covers the first liquid detection unit to protect the same from the ambient air; and a determining unit configured to determine whether the liquid is leaking from the member to be detected in response to a signal from the first liquid detection unit, wherein the first liquid detection unit includes: a measuring unit configured to include a light emitting unit and a light receiving unit; and an optical fiber pair which includes a light guiding optical fiber and a light receiving optical fiber, one end of the light guiding optical fiber being disposed inside an absorber, the other end of the light guiding optical fiber being optically connected to the light emitting unit, one end of the light receiving optical fiber being disposed inside the absorber and the other end being is optically connected to the light receiving unit, wherein the change in an optical property in the absorber is measured by letting light from the light emitting unit be emitted from the one end of the light guiding optical fiber and letting light entering from the one end of the light receiving optical fiber be received by the light receiving unit.