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    Gas meter
    44.
    发明专利
    Gas meter 未知

    公开(公告)号：SK17392002A3

    公开(公告)日：2003-06-03

    申请号：SK17392002

    申请日：2001-05-31

    Applicant: ABB RESEARCH LTD

    Inventor： MATTER DANIEL ,  PRETRE PHILIPPE ,  KLEINER THOMAS ,  WENK ALEXANDER

    IPC: G01F1/692 ,  G01F1/696 ,  G01F1/74 ,  G01F3/22 ,  G01F15/04 ,  G01F25/00

    Abstract: Determining a gas mixture consumption comprises calibrating a gas meter as the energy measuring device, where the calibration is based on a base gas mixture; and multiplying the measured energy consumption value with a correcting factor which considers the calorific value of the gas mixture. The calorific value is determined by an external unit. An Independent claim is also included for the gas meter used in the process. Preferred Features: Sensor signal values are determined for the calibration depending on the flow rate of a calibrating gas, and stored in the gas meter. The calibrating gas is air or oxygen.

    Proximity sensor operation method of
    48.
    发明专利
    Proximity sensor operation method of 未知

    公开(公告)号：DE19947380A1

    公开(公告)日：2001-04-05

    申请号：DE19947380

    申请日：1999-10-01

    Applicant: ABB RESEARCH LTD

    Inventor： HAFFNER KEN ,  PRETRE PHILIPPE ,  FRITZ OLIVER

    IPC: H03K17/95 ,  G01V3/10 ,  G01B7/14 ,  G01D5/14 ,  G01D5/20

    Abstract: The proximity sensor cooperates with a trigger (4), an LC resonant circuit (1) and a frequency generator (3). The sensor has an analysis circuit (5) for determining a component, independent of the trigger material, of a complex system parameter dependent on the position and the material of the triggering object (4). The system parameter can be e.g. the impedance of the LC circuit, the amplitude of oscillation or a voltage distribution between the oscillation circuit and a series resistance. An Independent claim is included for a proximity sensor.

    49.
    发明专利
    未知

    公开(公告)号：DE19926388A1

    公开(公告)日：2000-12-14

    申请号：DE19926388

    申请日：1999-06-10

    Applicant: ABB RESEARCH LTD

    Inventor： BYATT JOHN ANTHONY ,  KLEINER THOMAS ,  MATTER DANIEL ,  PRETRE PHILIPPE ,  RUEEGG WALTER

    IPC: B01D17/02 ,  E21B43/34 ,  G01F23/288 ,  G01N9/24

    Abstract: The invention relates to a sensor (1) for measuring density profile using gamma rays (5), which is particularly suitable for measuring the level in oil separator tanks. The known measuring principle involves conducting locally resolved measurement of a density-dependent gamma ray transmission of a medium (6a, 6b, 6c) by a vertical linear array (13) of photomultipliers( 7) and using said measurement to determine the location of an oil/water (6c) boundary layer. According to the invention, the gamma ray density sensor (1) is equipped with PIN photodiodes (10) instead of photomultipliers (7). Means for passive cooling for said photodiodes (10) are also provided. This considerably simplifies the structure, operation and maintenance of the sensor and improves local resolution and service life of the sensor (1). Passive cooling can be easily realized by building a thermal bridge (12) between the warm photodiodes (10) and the cool ambient medium or the cool wall (14) of the separator tank. Usability of the sensor (1) under difficult operating conditions and in non-easily accessible locations is generally improved.

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