High-temperature pipeline ultrasonic guided wave monitoring system and high-temperature pipeline ultrasonic guided wave monitoring method based on functional gradient materials
A functionally graded material and ultrasonic guided wave technology, which is used in the analysis of solids using sonic/ultrasonic/infrasonic waves to achieve the effects of alleviating stress concentration, simple structure and enhancing bonding strength
Inactive Publication Date: 2019-01-18
HENAN POLYTECHNIC UNIV
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Problems solved by technology
Use the material properties of FGPM to solve the fracture and debonding caused by various mismatches between the piezoelectric unit, the protective layer, and the measured object under multiple cold and hot cycles or high temperature environments
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[0031] Such as Figure 1-3 As shown, the present invention provides a high-temperature pipeline ultrasonic guided wave monitoring system based on functionally graded materials, including a computer 5, an ultrasonic pulse transmitting device 3, a piezoelectric probe group 1, a locking mechanism, a signal processing device 2 and an oscilloscope 4, and the locking The tightening mechanism presses the piezoelectric probe group 1 to the outer circumference of the high-temperature pipeline, the ultrasonic pulse emission device 3, the signal processing device 2 and the oscilloscope 4 are respectively connected to the computer 5 through the control cable, and the piezoelectric probe group 1 is respectively connected to the computer through the signal line 20. It is connected with the ultrasonic pulse transmitting device 3 and the signal processing device 2 .
[0032] The locking mechanism includes an upper snap ring 12 and a lower snap ring 13 that are both semicircular. The upper sna...
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The invention discloses a high-temperature pipeline ultrasonic guided wave monitoring system and a high-temperature pipeline ultrasonic guided wave monitoring method based on functional gradient materials, and relates to the technical field of ultrasonic guided wave monitoring, in particular to a high temperature resistant ultrasonic guided wave transducer. By setting a piezoelectric probe group outside the high-temperature pipeline to be detected, the ultrasonic pulse emitting device is controlled to emit an excitation signal to the probes so as to excite an ultrasonic guided wave on the pipeline, an echo is generated when the guided wave contacts the defect or the damaged portion, then an echo signal is received by the piezoelectric probe group, and the received signal is processed and analyzed through a computer by an ultrasonic signal processing device, thereby finally calculating the position and size of the defect or damage of the high-temperature pipeline. The high-temperature pipeline ultrasonic guided wave monitoring system and high-temperature pipeline ultrasonic guided wave monitoring method based on functional gradient materials provided by the invention greatly improvethe problem of breakage and de-bonding of the transducer components caused by the mismatch of the thermal expansion coefficients of the various units in the ultrasonic transducer under the high temperature pipeline environment, and can also meet the different requirements of the material performance of different parts of the structural components to achieve the purpose of optimizing the overall performance of the structure.
Description
technical field [0001] The invention belongs to the technical field of ultrasonic detection, and in particular relates to a high-temperature pipeline ultrasonic guided wave monitoring system and method based on functional gradient materials. Background technique [0002] Under the condition of high temperature, the pipeline is subjected to the impact, corrosion and wear of the high-speed flowing medium; under the action of repeated stress, the pipeline working under high temperature for a long time will inevitably undergo creep, fatigue, aging, deterioration, and finally form defects and cracks. If these defects cannot be found in time, it may lead to a huge disaster, and cause great environmental damage and economic loss of personnel. In this regard, the state has formulated strict regulations on regular health inspections. Routine inspections, including visual inspections, eddy current testing, and ultrasonic testing, are performed during downtime and at ambient temperatu...
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Login to View More IPC IPC(8): G01N29/04
CPCG01N29/04
Inventor 禹建功李默张小明李海林张博
Owner HENAN POLYTECHNIC UNIV