摘要:
An intelligent system for monitoring and assessing the technical condition of prestressed lap or butt screw joints is characterized by the permanent and detachable mounting of an intelligent monitoring head on the monitored lap or butt screw joint (6). This occurs at the end of the screw shank (5), protruding above the joint nut. The measuring GUM (1) or GUT (2) is attached through an adapter (3). The intelligent monitoring and measuring impact head (1) comprises a body (1a), a vibration sensor, and an intelligent electronic system (1b). This system allows the collection of energy necessary to activate the activator (1c) and induce impulse excitation of the impactor (1d). The impactor (1d) is positioned above the front surface of the screw shank (5). The GUT (2) intelligent ultrasonic measurement and monitoring head GUT (2) consists of the body (2a) and an intelligent electronic system (2b) that activates an ultrasonic probe (1c) located above the front surface of the screw shank (5) and immersed in the coupling medium (O). Intelligent heads GUM (1) or GUT (2) are mounted on at least one, preferably on each, monitored screw (5) of the PZ lap joint or PD butt joint (6) of the structure, respectively. One head of a given type is mounted on the shank of one screw. Each head (1) or (2), with an adapter (3) and a locknut (4), is mounted in such a way as to ensure watertightness.
摘要:
A fluid pipe 1 is monitored using a distributed acoustic sensing (DAS) fibre 10 provided within pipe 1. The DAS fibre 10 is coupled at one end to a light emitter 101 and a light detector 102. The light emitter 101 emits light pulses into the DAS fibre. The light detector 102 detects backscattered light so as to provide an indication of the vibration experienced by each section of the DAS fibre 10 and thus of vibration characteristic of particular pipe events including leaks or the lie. The DAS fibre 10 in a pipe 1 can also be used to locate the route of a buried pipe 1 by successively tamping the ground surface at a number of locations A-E in the vicinity of the suspected route of the pipe 1 and comparing the tamping vibrations detected from each location A-E.
摘要:
A fluid pipe 1 is monitored using a distributed acoustic sensing (DAS) fibre 10 provided within pipe 1. The DAS fibre 10 is coupled at one end to a light emitter 101 and a light detector 102. The light emitter 101 emits light pulses into the DAS fibre. The light detector 102 detects backscattered light so as to provide an indication of the vibration experienced by each section of the DAS fibre 10 and thus of vibration characteristic of particular pipe events including leaks or the lie. The DAS fibre 10 in a pipe 1 can also be used to locate the route of a buried pipe 1 by successively tamping the ground surface at a number of locations A-E in the vicinity of the suspected route of the pipe 1 and comparing the tamping vibrations detected from each location A-E.
摘要:
The invention relates to a sensor for a high-pressure line and to a method for producing same. The aim of the invention is to provide a sensor for a high-pressure line, said sensor being suitable for detecting parameters or properties of a fluid conducted in a high-pressure line, wherein the sensor maintains the high pressure of the fluid. According to the invention, this is achieved by a sensor for a high-pressure line, comprising an outer tube which is made of metal and comprises an outer surface, an inner surface, an outer diameter, and an inner diameter, and an inner tube which is made of metal and comprises an outer surface, an inner surface, an outer diameter, and an inner diameter, said inner tube extending concentrically in the outer tube such that the inner tube and the outer tube together form a tube. The total wall thickness of the tube, measured as half of the difference between the outer diameter of the outer tube and the inner diameter of the inner tube, equals or is greater than the inner diameter of the inner tube. The sensor also comprises at least one groove which extends in the outer surface of the outer tube or in the outer surface of the inner tube in a longitudinal direction of the tube, at least one signal line arranged in the groove, and at least one receiver which is connected to the signal line, said receiver being arranged at least in the groove or in at least one recess which is introduced at least into the outer surface of the inner tube or into the inner surface of the outer tube in addition to the at least one groove. The outer tube sits on the inner tube in a force-fitting manner.
摘要:
A mechanical force measurement system is for measuring a force onto an object. The measurement system includes a sound wave generator which is adapted to generate a solid borne sound wave signal within the object. The system further includes a first sound wave receiver which receives a first solid borne sound wave signal based on the solid borne sound wave signal generated within the object by the sound wave generator. In order to compare a phase of the generated solid borne sound wave signal and a phase of the first received solid borne sound wave signal, and to generate a comparison signal based thereon. The system also includes a comparator unit. An evaluation unit of the system determines the mechanical force based on a data base and the comparison signal. The data base has stored a relation of a mechanical force and a comparison.
摘要:
A system for measuring structural integrity includes a self-contained rapid modal testing trailer that delivers an impact load to a structure being tested and records data resulting from the impact load, and a data processing software that extracts modal parameters of the structure, such as frequencies and mode shapes. The parameters are used to determine anomalous behavior as well as provide experimental data for finite element model calibration.
摘要:
Zur Gewinnung von Daten zu einem Rotorblatt (2) für eine Windenergieanlage wird das Rotorblatt (2) an seiner Blattwurzel (3) eingespannt, werden Sensoren (5) angebracht, die zeitaufgelöst Verlagerungen von verschiedenen Punkten des Rotorblatts (2) erfassen und wird das eingespannte Rotorblatt (2) mindestens einmal in einem Modenscan (15) nacheinander mit einer Vielzahl unterschiedlicher Frequenzen zu Schwingungen angeregt. Während des Modenscans werden die Verlagerungen der Punkte des Rotorblatts (2) mit den Sensoren (5) zeitaufgelöst erfasst. In einem Dauerschwingtest (16) wird das eingespannte Rotorblatt (2) mit einer vorgegebenen Frequenz zu Schwingungen angeregt, die auf eine Eigenfrequenz des Rotorblatts (2) eingestellt wird. Das Rotorblatt (2) wird auf Beschädigungen in dem Dauerschwingtest (16) untersucht. Dazu wird der Modenscan (15) während des laufenden Dauerschwingtests (16) mehrfach durchgeführt wird, wobei zwischen den Durchführungen des Modenscans (15) zumindest ein Teil des Dauerschwingtests (16) durchgeführt wird und wobei die Anregungen mit den unterschiedlichen Frequenzen während des Modenscans (15) der Anregung mit der einen Eigenfrequenz des Rotorblatts (2) überlagert werden.