摘要:
According to the arrangement invented the deflection of a blade of a wind turbine is determined. A transmitter is arranged close to the tip end of the blade, while a receiver is arranged close to the root end of the blade. The transmitter and the receiver are prepared for a wireless transfer of a monitoring signal, which is sent from the transmitter to the receiver. A monitoring system is arranged close to the root end of the blade. The monitoring system is prepared to generate the monitoring signal. The monitoring system is connected with the transmitter by a cable-bound communication line, thus the monitoring signal is transferred from the monitoring system to the transmitter. The monitoring system is even connected with the receiver, thus the monitoring signal is transferred from the receiver to the monitoring system. The monitoring system is prepared to determine the deflection of the blade based on the transferred monitoring signal.
摘要:
Das Verfahren zur Kontrolle des Zustands einer langgestreckten Konstruktion (1) besteht in der Anordnung und Befestigung einer langen Wellenenergieübertragungsleitung (5) auf der Oberfläche dieser Konstruktion längs wenigstens dreier Mantellinien. Anhand der gemessenen Krümmung der Mantellinien bestimmt man die Krümmung und die Torsion der Achse (6) der Konstruktion (1), die Koordinaten der gewählten Punkte und die mechanischen Kennwerte. Die Einrichtung für die Durchführung des Verfahrens enthält eine Quelle (4) modulierterWellenenergie, ein Raumfilter (8), eine lange Wellenenergieübertragungsleitung (5), ein Raumfilter (12), eine Einheit (7) zur analogen Informationsverarbeitung, einen ADW (26), einen Mikroprozessor (27), ein Videoterminal (16).
摘要:
A component (10), a method (200) of making a component (10) and a method (100) of monitoring strain. The component (10) has an array of internal nodes (40) with a radiopacity distinct from the predominant radiopacity of the component (10). Displacement of the nodes (40) can be measured and used to calculate strain on the component (10).
摘要:
A method of non-invasively measuring strain and temperature of an object, substantially simultaneously, using neutrons of selected energy levels is described. A pulsed neutron source is made to emit thermal and epithermal neutrons in a collimated beam directed at a target object. Temperature is monitored by observing the thermal Doppler broadening of resonances in the neutron transmission characteristic for the epithermal neutrons and strain is measured form observed made of changes to the thermal neutron diffraction pattern.
摘要:
The general field of the invention is that of tomographs comprising at least one first emission source (GX1), one first matrix detector (D1) and calculation means(C), arranged to produce an initial tomograph of an object (E) from radiographs coming from a first matrix detector and taken at various angles. The tomograph according to the invention comprises a second emission source (GX2) and a second matrix detector (D2) arranged in such a way that, when the object is subject to a known stress at a given time, said stress being potentially a mechanical stress or a two-phase fluid flow in a porous medium, the calculation means determine the changes to the object subjected to said stress using only knowledge from a first radiograph of the stressed object coming from the first matrix detector, from a second radiograph of the stressed object coming from the second matrix detector and from the initial tomograph, the first radiograph and second radiograph being taken at the same given time.