摘要:
A non-destructive inspection device comprising an exciting unit (11) for generating sound waves (W) and a receiving unit (12) for receiving reflected waves by being pressed onto the surface of an object to be measured (16), a pressing mechanism (13) for pressing the exciting unit and the receiving unit onto the object to be measured, a pressing force measuring unit (14) for detecting pressing forces (Fa, Fb) at exciting, an exciting control unit (10) for driving the exciting unit, and a received signal processing unit (15) for judging internal defects based on received signals (R), the received signal processing unit including a reflection energy computing unit for computing a reflection energy level generated by the elastic vibration of the object to be measured, a reflection energy correcting unit for determining a correction value obtained by standardizing a reflection energy level in terms of a pressing force, and an internal defect judging unit for detecting internal defects based on the correction value, whereby absolute reflection energy levels of reflection waves can be compared for judging to thereby significantly improve an evaluation accuracy of an internal defect.
摘要:
The invention relates to a method and a device for assessing the quality class of an object that is to be tested, wherein the device (100) for assessing the quality class of a an object to be tested comprises a device for detecting a test signal (108) coming from the object (104) to be tested. The device (100) for assessing also includes a device (110) for providing a stochastic Markov model, which comprises states and transitions between states based on reference measurements of objects of known quality classes, in addition to a device (114) for evaluating the test signal (108) using the stochastic Markov model. The device (110) for assessing further comprises a device (118) for classifying the object (104) to be tested in a quality class (GK) based on the evaluation of the test signal. The advantage of said device (110) is that the object (104) to be tested can be classified in a quality class (GK) in a more exact manner in comparison with prior art.
摘要:
Die Erfindung betrifft ein Verfahren zum Handhaben und Prüfen von Werkstücken, insbesondere von dünnen, plattenartigen Prüfsubstraten (100), wobei das Prüfsubstrat (100) zur Erkennung von Fehlern und/oder Beschädigungen in einer Prüfoperation (2) einer Schallprüfung unterzogen wird, wobei das Prüfsubstrat (100) in Schwingung versetzt wird und Schall, welcher vom Prüfsubstrat (100) abgegeben wird, mittels einem Schallsensor (11) gemessen, und ein Messsignal einer Signalauswerteeinrichtung zugeführt und ausgewertet wird, wobei das Prüfsubstrat (100) zumindest einer weiteren Prüf- und/oder Sortieroperation (3, 4) zur Prüfung zumindest eines weiteren Prüfkriteriums und/oder zur Ermittlung zumindest eines Sortierkriteriums unterzogen wird sowie eine Vorrichtung zum Durchführen des Verfahrens.
摘要:
A process for the non-destructive testing of a refractory lined process vessel comprising the steps of: (a) striking an external wall of a process vessel internally lined with a refractory material with an impulse hammer; (b) measuring selected frequency characteristics of the refractory lined process vessel; and (c) analysing the measured frequency characteristics and determining the integrity of the internal lining of refractory material from said measured frequency characteristics.
摘要:
A method has been developed for predicting a remaining operational life of a turbine component (10) including: obtaining crack flaw data (30) regarding current crack flaws in the turbine component; using the crack flaw data with data (28) regarding the structure and operating conditions of the turbine component to determine (27) force loads applied to the turbine component and generate crack propagation data; applying a probalistic analysis (34) to the crack flaw data and the generated crack propagation data to generate a statistical distribution of crack data (36), and applying the statistical distribution of crack data to predict a time to failure (46) of the component by iteratively determining the force loads for successive periods of time.
摘要:
A method and system is disclosed for detecting structural damage in a structure by detecting acoustic emissions from damage in a structure to obtain acoustic emission data, and processing the acoustic emission data in accordance with a model characterising acoustic paths. Acoustic emissions are induced by a simulation mechanism at a plurality of positions and detected by at least three sensors arranged on the structure.
摘要:
Microcracking in concrete structures is monitored acoustically. The resulting signals can be used to determine corrosion of metal reinforcing wires or rods, or damage occurring from accident or seismic events.
摘要:
A method and an apparatus for monitoring the production of blow molded plastic containers (20) includes a columnator (26) and sound detector (24) responsive to a defect sound of pressure fluid escaping from a container being formed in a mold cavity (14). The columnator is effective to filter the defect sound from ambient noise. An output signal generated by the sound detector is processed to generate a control signal used to reject a defective container. Preferably, the open end of the columnator is positioned between 20° and 150° from the preform loading station in a rotary platform (12) blow molding machine.
摘要:
The invention concerns a device and a method for detecting defects (1) in an object (2) comprising means for locally exciting the surface (3) of the object (2) including at least a friction element (4), means for detecting the vibratory response of the object (2) and means for processing the detected signal. The friction elements (4) advantageously comprise brushes. The detection means include microphones (7) arranged proximate to brushes or accelerometers (7), coupled with said brushes. The signal processing means comprise an acquisition card (8) and a computer (10). Displacement means (11) cause the object (2) to move at constant speed relative to the excitation and detection means, or inversely. Said device and said method can advantageously be used for non-destructive industrial control of assembled solid wooden parts and wood-based products (tiles, panels, and the like) for fast detection of defects (delamination, blisters and the like).
摘要:
Die Erfindung betrifft ein Verfahren zur Qualitätsprüfung von Gussteilen. Es können mehrere Prüfschritte einzeln oder in Kombination ausgeführt werden. Es kann eine Wirbelstromprüfung vorgenommen werden, indem die Gussteile mit einer definierten Geschwindigkeit durch ein Magnetfeld gezogen werden. Weiterhin kann ein Schallprüfung vorgenommen werden, indem die Gussteile mit einer definierten Kraft angeschlagen werden und das Schallspektrum ausgewertet wird. Weiterhin kann noch ein optische Längenmessung vorgenommen werden.