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    • 7. 发明专利
    • DEW POINT SENSOR
    • JP2000283938A
    • 2000-10-13
    • JP32186799
    • 1999-11-12
    • GEN ELECTRIC
    • SHAPIRO ANDREW PHILIPDEAN ANTHONY JOHN
    • G01N25/66G01N25/68G01N27/00
    • PROBLEM TO BE SOLVED: To determine the dew point in a non-optical manner without condensation by measuring the temperature of a quartz crystal resonator(QCR) stored in a pressure vessel by a temperature sensor, and monitoring the frequency of the QCR. SOLUTION: In a dew point sensor 100, a QCR 112 is stored in a pressure vessel 104, and closely attached to a temperature control plate 110. A temperature sensor 114 is arranged so as to generate the signal indicating the temperature of the QCR 112. A circuit 116 is connected to the QCR 112 and the temperature sensor 114, the temperature of the QCR 112 is controlled to calculate the dew point value of a fuel flow 118, and the frequency of the QCR 112 is measured and monitored. The circuit 116 includes a computer 119 to process the signal and to give the reported dew point and the display. Since the change in frequency is detected, the temperature at which the frequency is changed is not affected even when a pollutant is deposited on the crystal. The dew point sensor 100 is capable of measuring the dew point even if the condensate is water or organic matters.
    • 10. 发明专利
    • IN-PIPING PARTICULATE DETECTOR
    • JP2001027599A
    • 2001-01-30
    • JP2000174588
    • 2000-06-12
    • GEN ELECTRIC
    • DEAN ANTHONY JOHNSHAPIRO ANDREW PHILIP
    • G01N15/06G01N15/14G01N21/49G01N21/53G01N21/85
    • PROBLEM TO BE SOLVED: To monitor the quality of a fuel gas or other process gases by a method wherein a light beam is emitted to an inner flow part from a light source arranged within a housing, a first photodetector and a second photodetector which are positioned within the housing detect total intensities and base line levels of the light beam, and the ratio of the intensities is found. SOLUTION: A light beam 110 is emitted to an inner flow part 112 from a light source 104 which is positioned within a housing 102, A photodetector 106 is arranged so as to face the light source 104, and a photodetector 108 is arranged so as to be adjacent to a position which is deviated from the photodetector 106 in a range of about 10 deg. to 60 deg. in an angle direction. When particles or other interfering substances do not exist in a gas flow which is moved in the inner flow part 112, the photodetector 108 detects the baseline level of light reflected from the photodetector 106 and the Rayleigh scattering of the light from gas molecules in the flow, Then, when the particles or the like exist, the amount of the existing particles is found by a circuit 114 on the basis of the ratio of the total light intensity of the light detected by the photodetector 106 to the light intensity of the light detected by the photodetector 108.