摘要:
According to an embodiment, a structure evaluation system includes a plurality of AE sensors, a signal processor, a position locator, a velocity calculator, and an evaluator. The AE sensors detect an elastic wave generated from a structure. The signal processor extracts an AE signal including information on the elastic wave by performing signal processing on the elastic wave detected by the AE sensor. The position locator derives a wave source distribution indicating a distribution of sources of the elastic waves generated in the structure on the basis of the AE signals. The velocity calculator derives a propagation velocity of the elastic wave generated in the structure on the basis of the AE signal. The evaluator evaluates the soundness of the structure on the basis of the wave source distributions and the propagation velocity of the elastic waves.
摘要:
In einer Vorrichtung zur Inspektion gefüllter Behälter (1) auf etwaige Fremdkörper (2) wird der gefüllte Behälter durch Vibration oder Rotation mechanisch angeregt, um die ggf. vorhanden Fremdkörper in Bewegung zu versetzen. Die durch Stöße der Fremdkörper mit der Behälterinnenwand entstehenden akustischen Signale werden erfasst und ausgewertet. Erfindungsgemäß wird dabei die Signaldetektion von der mechanischen Anregung und die mechanische Anregung vom Transport der Behälter getrennt, indem der Sensor (3) zur Signaldetektion erst nach Abschluss der mechanischen Anregung an den Behälter angelegt wird, bzw. die mechanische Anregung durch ein Anregungselement (6, 7) erfolgt, das unabhängig von den für den Transport verwendeten Halteelementen (5) mit dem Behälter (1) in Kontakt gebracht wird.
摘要:
A method includes performing a first damage prediction with a computational model using at least data from a first multitude of damage sensors on a structure, performing a second damage prediction with the computational model using at least data from a second multitude of load sensors associated with the structure, and selectively performing a damage monitoring action in response to the first damage prediction and the second damage prediction to determine a structural health A system includes a computing device configured to perform a first damage prediction using at least data from a multitude of damage sensors on a structure, a second damage predication using at least data from a multitude of load sensors associated with the structure, so as to selectively perform a damage monitoring action in response to the first damage prediction and the second damage prediction to determine a structural health of the structure.
摘要:
Provided is a device for detecting a malfunction of a rotating machine, the device being able to early detect the malfunction and to have a reduced size. The device includes a detecting unit for detecting vibration of the machine, sampling a signal indicative of the vibration with a predetermined sampling frequency, and outputting, at a time at intervals of a predetermined period, a plurality of the sampled data detected within the predetermined period, a storage for storing the plurality of the sampled data, a frequency analyzer for analyzing the frequency of the plurality of the sampled data, a determination unit for performing a primary determination based on the result of the analysis. a display unit for displaying the result of the analysis in chronological order and in real time, and a communication unit for transmitting the plurality of the sampled data to an information-processing device for performing a secondary determination.
摘要:
An acoustic measurement system for an industrial process asset includes a process measurement device providing a value representative of an acoustic signal near the industrial process asset based in part on a signal from an acoustic sensor positioned near the industrial process asset. A second acoustic sensor provides an acoustic value and a noise reduction component uses the acoustic value from the second acoustic sensor to affect the value provided by the process measurement device so that the value provided by the process measurement device is more representative of an acoustic signal generated by the industrial process asset.
摘要:
The invention relates to a device for characterising a moving object, wherein said device includes: a module for characterising (3) said object (5); a guiding element (9) for guiding the object (5), configured such as to at least partially limit the movement of the object (5); a percussion element (4) arranged such as to generate an impact on the object (5) during the movement thereof after said object has at least partially engaged the guiding element (9); an acoustic system (6) configured such as to record an audio signal representing said impact between the percussion element (4) and the object (5), said acoustic system (6) being connected to said characterisation module (3) so that the recorded audio signal contributes to the characterisation of said object (5).
摘要:
The invention relates to a method for joining a plurality of workpiece parts (22, 24), in particular body parts, in which: a) the workpiece parts (22, 24) are inserted into a joining tool (10), b) the workpiece parts (22, 24) in the joining tool (10) are monitored for damages, c) the workpiece parts (22, 24) are joined by the joining tool (10), and d) the joined workpiece (26) is monitored for damages in the joining tool (10).
摘要:
A method of detection of defects in a manufacturing process of an elongated metallic material (1) which manufacturing process is accomplished by rolls (3, 6) which rolls (3, 6) reduce the cross section of the elongated metallic material (1) thinner and/or divert or guide the path of the elongated metallic material (1). The formation and/or existence of defects of the elongated metallic material (1) is detected by sensing acoustic emission transmitted by origination or advance of the defects and the detection is accomplished by at least one acoustic emission (AE) sensor (9) having direct or indirect contact with the elongated metallic material (1) which AE sensor (9) transduces the sensed acoustic emission to electric signals and the signals are received by an analyzing unit (21) which is capable of detecting the indication and reporting time coded indication and/or the indicative amplitude of the originated or advanced defects.