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    • 9. 发明专利
    • STEAM WETTABILITY MEASURING INSTRUMENT
    • JPH0228538A
    • 1990-01-30
    • JP13137189
    • 1989-05-26
    • HITACHI LTD
    • SATO TAKESHITSUJI SHOGOSHIGETA KENGOUENISHI AKIRA
    • G01N15/02G01N15/06
    • PURPOSE:To measure the grainy particle distribution of wet steam by inputting the intensity of photodetection at plural positions which differ in angle and calculating the grading distribution. CONSTITUTION:Light which is emitted by a light source 81 through a power unit 94 is guided to an irradiation window 94 through the optical fiber 82 in a main body 85, projected in a space C, and scattered by drops of water in the wet steam. The scattered light is received by light receiving windows 86-89 which have various angles and guided to an optical switch 95 by optical fibers 90-93. This optical switch 95 switches light beams from the optical fibers 90-93 at specific intervals of time with a switch switching signal generated by a controller 96 and they are guided to a photodetecting element 97. Then the element 97 converts the light into a voltage. Further, the signal from the controller 96 is sent to a signal processing arithmetic unit 99 through a synchronizing device 98 and signals from the light receiving windows 86-89 which are converted into voltages by the element 97 are stored corresponding to each light receiving window in synchronism with the operation of the optical switch 95. Thus, data on a group of water drops in the space C are obtained.