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    34.
    发明专利
    未知

    公开(公告)号：DE19946917A1

    公开(公告)日：2001-04-12

    申请号：DE19946917

    申请日：1999-09-30

    Applicant: ABB RESEARCH LTD

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

    IPC: G01D5/48 ,  H03K17/95 ,  G01D21/00 ,  G01B7/14 ,  G01F23/284 ,  G01V3/08 ,  H03K17/945

    Abstract: The inventive proximity sensor comprises a power supply unit (1), a switching unit (2) and a sensor unit (3). The sensor unit (3) has one or more sensor elements as well as means for controlling these sensor elements, and comprises means for measuring relevant physical quantities of the sensor elements and means for generating measurement data, whereby the switching unit (2) intermittently connects the sensor unit (3) to the power supply unit (1). This makes it possible to use existing sensor units (3) in a power-saving manner without having to adapt them or by only slightly adapting them. An inventive proximity sensor preferably has a wireless feed and a wireless transmission of measurement data. A preferred variant of the invention is used for proximity switches. The proximity switches are preferably inductive, capacitive, photoelectric, ultrasonic or Hall sensors.

    36.
    发明专利
    未知

    公开(公告)号：DE19938270A1

    公开(公告)日：2001-02-15

    申请号：DE19938270

    申请日：1999-08-12

    Applicant: ABB RESEARCH LTD

    Inventor： BYATT JOHN ANTHONY ,  JUELKE ELIAS ,  KLEINER THOMAS ,  MATTER DANIEL ,  PRETRE PHILIPPE

    IPC: G01F23/26

    Abstract: A capacitative level sensor (1), especially for determining the boundary (34) between water (3) and oil (4) in a separator tank (2), comprises a measurement probe (5) with an electrode (6). The probe has an electrically insulating cover (7), and at least one outer layer (7a) made of fluorated plastic and at least one inner layer (7b) made of a plastic containing mica.

    Level measurement system for multi-phase offshore separator tank, comprises gamma detector to detect shadow of natural gamma radiation absorption by tank contents using long, vertical scintillation detector
    38.
    发明专利
    Level measurement system for multi-phase offshore separator tank, comprises gamma detector to detect shadow of natural gamma radiation absorption by tank contents using long, vertical scintillation detector 未知

    公开(公告)号：DE19847555A1

    公开(公告)日：2000-04-20

    申请号：DE19847555

    申请日：1998-10-15

    Applicant: ABB RESEARCH LTD

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

    IPC: G01F23/288

    Abstract: A psi detector (3,3a,3b) produces a level-related signal from attenuation of background psi radiation (2). An Independent claim is included for the corresponding level detection system, sensing tank vertical density profile. Preferred Features: A long psi detector, especially a scintillation detector (3a) employs a photomultiplier- (3a) or a photodiode- (3b) array. The detector (3-3b) is orientated along the filling direction of the vessel. The scintillation detector is a light-transmitting rod, an optical fiber or an optical fiber bundle. It is vertically arranged in the separator tank (4), or to a side of it which is screened from the background radiation by the tank contents (5-8). Scintillations are split into two portions, their light led by differing propagation paths to the photodetectors. Time delays of photodetector signals from correlated scintillations are measured, from which the point of scintillation is calculated. From the frequency distribution of scintillation source points, a density profile and especially levels of the vessel contents are determined. To follow level variation, the process is carried out continuously and/or drift in the electronics is eliminated, using a calibration source, especially a weak psi or alpha emitter. Photodetector signal pulse height is discriminated by the electronics. The threshold is an exponentially-decreasing function of the time delay, selected such that scintillations are evaluated in a given energy spectrum.

    39.
    发明专利
    未知

    公开(公告)号：NO991925D0

    公开(公告)日：1999-04-22

    申请号：NO991925

    申请日：1999-04-22

    Applicant: ABB RESEARCH LTD

    Inventor： BYATT JOHN ,  KLEINER THOMAS ,  KOGELSCHATZ ULRICH ,  MATTER DANIEL

    IPC: G01N21/15 ,  G01N33/18 ,  G01N

    Abstract: The present invention relates to a method and a device for fluorescence measurement of oil residues in water. The core of the invention is to use a powerful, narrow-band excimer lamp to excite intensive fluorescence radiation to detect the latter with a photodiode or the like, and to determine the oil concentration therefrom. The excimer lamp can be designed as a flat radiator a hollow cylindrical inner radiator or a tubular radiator, and can be combined with a through-flow or free fall measuring cell. The excimer lamp is advantageously operated in a pulsed or modulated fashion, the fluorescence radiation is measured at a right angle to the exciting radiation, the emitted and/or transmitted exciting light is monitored with the detectors, and a redundant measuring arrangement with a plurality of excimer lamps and fluorescence detectors is provided. The sensor is distinguished by reliability, freedom from maintenance and a long service life.

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