Abstract:
An electrical switching device. which comprising at least one ingoing (51) conductor and at least a first (2) and a second (3) outgoing conductor, and an arrangement for connecting and disconnecting the conductors by means of an axial movement. The arrangement comprises an axially movable element (58), which is movable between a first and a second position. The device is arranged such that when the axially movable element (58) is in the first position, the ingoing conductor (51) and the first outgoing conductor (2) are electrically connected, and the ingoing conductor (51) and the second outgoing conductor (3) are disconnected. When the axially movable element (58) is on the second position, the ingoing conductor (51) and the first outgoing conductor (2) are disconnected, and the ingoing conductor (51) and the second outgoing conductor (3) are electrically connected.
Abstract:
Electrical high voltage lead-in comprising an insulating member (3) and at least one conductor member (4) extending through the insulating member (3), and an annular restraining member (2) peripherally encompassing the insulating member (3), wherein the members (2, 3, 4) are separately prefabricated. The members (2, 3, 4) are assembled by reciprocal shrinkage fit between the conductor member (4) and the insulating member (3) respectively on the one hand, and between the insulating member (3) and the retraining member (2) on the other hand. The conductor member(s) consists mainly of El-copper.
Abstract:
The present invention relates to a valve positioner (1) comprising: a valve operation information unit adapted to obtain operational information about a valve (14); a processing unit adapted to prepare a communication message comprising the operational information about the valve (14); a wireless transmitter adapted for transmission of a wireless communication signal comprising the communication message to a central valve monitoring unit (6); and an antenna adapted to transmit the wireless communication signal. The invention also relates to a central valve monitoring unit (6), a valve monitoring system (10), as well as to a method of using a valve positioner (1) for upgrading a valve monitoring system (10). (Fig 3)
Abstract:
The invention relates to a method for localizing a node in a wireless network, the method comprising: receiving location signals transmitted by beacons, the location signals comprising information about the locations of the respective beacons; detecting the respective received signal strengths of the received location signals; obtaining information about the different signal levels at which the beacons can transmit; studying the received location signals; determining the signal levels used by each of the beacons for the transmission of the location signals, based on the studying of the received signals; calculating a distance to each of the beacons based on the detected signal strengths and the determined signal levels; and localizing the node by means of the received location information and the calculated distances. The invention also relates to a node ant to a wireless network.
Abstract:
A wireless vibration sensor is disclosed suitable for connection to a distributed industrial control system (50) arranged with a wireless network (27) for communication of process data or control information. The wireless vibration sensor comprises at least one a sensor (10), a wireless radio transmitter (14), and a base part (1) or for mounting it firmly on an equipment (M) or a structure. The wireless sensor is arranged with a battery and a power storage device. A method for powering up the wireless sensor during active cycles is also described.
Abstract:
The invention provides a method for navigating in a process control system. The process control system comprises a graphical user interface with a plurality of graphic objects each associated with a process control object wherein at least one graphic object has an active link for monitoring or controlling at least one physical control object. The graphical user interface is arranged with navigation means so that a user can indicate or select at least one point (+) in a process section on said graphical user interface as a first user input and increase, in a continuous animated movement, the scale at which the at least one point (+) and its immediate surroundings in the process section are displayed. Further, the zooming-in or zooming out continues displaying a view of the indicated or otherwise selected point (+) on said graphical user interface and scaling it up continuously until a predetermined scale is reached or, until a second user input is received. At that stage the a scaled-up view of the indicated or otherwise selected at least one point (+) is displayed at the scaled-up level.
Abstract:
Method in an oil and/or a gas production system comprising a plurality of oil and/or gas wells each producing a multiphase fluid stream, adapted for predicting change in produced fluids resulting from change in manipulated variables. Fitted model parameters which express the relationship between the change in manipulated variables and the produced fluids are determined from a set of historical production measurements. The method comprises the steps of: a. choosing a model structure which predicts change in produced fluids as a function of the change in manipulated variables, where the predicted change in produced fluids depends on the value of fitted model parameters; b. determining fitted model parameters so that predictions of produced fluids match said historical production measurements as closely as possible; c. determining a quality tag that describes the uncertainty of said predictions of change in produced fluids.
Abstract:
A method for production optimization in an oil and/or a gas production system comprising: at least two flow sources leading to at least one common downstream flow line, and at least one manipulated variable of the production system, wherein the method comprises use of: a computational model of the production system comprising an interdependence between flow rates of said flow sources and a flow rate of the downstream flow line, and values of the manipulated variable; a feasible set defined by at least one constraint of the manipulated variable, and an objective function, to be optimized within said feasible set, defined by using said computational model. The method comprises the steps of: - splitting by calculation said feasible set into at least two subsets, - calculating, for each of said subsets, a best bound of said objective function by using said computational model, and - manipulating said manipulated variable by using said best bound to optimise said oil and/or gas production.
Abstract:
A method for production optimization in an oil and/or a gas production system comprising: at least two flow sources leading to at least one common downstream flow line, and at least one manipulated variable of the production system, wherein the method comprises use of: a computational model of the production system comprising an interdependence between flow rates of said flow sources and a flow rate of the downstream flow line, and values of the manipulated variable; a feasible set defined by at least one constraint of the manipulated variable, and an objective function, to be optimized within said feasible set, defined by using said computational model. The method comprises the steps of: - splitting by calculation said feasible set into at least two subsets, - calculating, for each of said subsets, a best bound of said objective function by using said computational model, and - manipulating said manipulated variable by using said best bound to optimise said oil and/or gas production.
Abstract:
A method for controlling a painting system comprising an industrial robot or manipulator arm arranged with a wrist section and carrying a paint applicator arranged on the robot wrist. Paint is applied by the applicator to a substantially circular or elliptical area on said surface, and the centre of the area is defined as a Tool Centre Point. The wrist section is arranged capable of moving and orienting the paint applicator. In the improved method the paint applicator is moved by said manipulator arm so that the Tool Centre Point moves along a planned path so coating a part of said surface. The planned path may comprise one or more bends. The path taken by the robot wrist may be controlled to follow a different path from the path taken by the TCP. A system and a computer program for carrying out the method are also described.