CN101726543A - Wave guide rod for acoustic emission testing - Google Patents

Wave guide rod for acoustic emission testing Download PDF

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Publication number
CN101726543A
CN101726543A CN200910234666A CN200910234666A CN101726543A CN 101726543 A CN101726543 A CN 101726543A CN 200910234666 A CN200910234666 A CN 200910234666A CN 200910234666 A CN200910234666 A CN 200910234666A CN 101726543 A CN101726543 A CN 101726543A
Authority
CN
China
Prior art keywords
guide rod
wave guide
acoustic emission
waveguide rod
temperature
Prior art date
Application number
CN200910234666A
Other languages
Chinese (zh)
Inventor
蒋俊
梁华
易容
张耀丰
Original Assignee
南京市锅炉压力容器检验研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 南京市锅炉压力容器检验研究院 filed Critical 南京市锅炉压力容器检验研究院
Priority to CN200910234666A priority Critical patent/CN101726543A/en
Publication of CN101726543A publication Critical patent/CN101726543A/en

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Abstract

The invention discloses a wave guide rod for acoustic emission testing, which comprises a wave guide rod main body and two connecting ends, wherein the first connecting end is connected with a tested object, and the second connecting end is connected with an acoustic emission sensor; and the wave guide rod is characterized in that the wave guide rod main body is in the shape of a rotary body, and contour lines which are symmetric on two sides of a rotary center can meet a hyperbolic equation, wherein a is equal to 5-15, and b is equal to 5-15. A magnet is arranged at the first connecting end of the wave guide rod, so as to facilitate the connection of the wave guide rod with the tested object. Compared with the prior art, the wave guide rod main body is the rotary body, contours of the wave guide rod main body meet the hyperbolic equation, when one end is connected with the tested object, the other end is connected with the acoustic emission sensor, and the temperature of the tested object is transferred by the wave guide rod, then the fast gradient change of the temperature, that is the fast temperature attenuation, can not affect the acoustic emission sensor; simultaneously, the transferred acoustic signal attenuation is small and the test precision is high.

Description

A kind of waveguide rod that is used for acoustic emission detection
Technical field
The present invention relates to a kind of waveguide rod, belong to the acoustic emission testing technology field.
Background technology
Acoustic emission detection be a kind of can whole survey and evaluation structure in the Dynamic Non-Destruction Measurement method of state of defective.Be widely used in fields such as petrochemical complex industry, power industry, material test, civil engineering, space flight and aircraft industry.Yet in the actual detected engineering practice, Chang Yinwei structure or device temperature are too high, have exceeded the serviceability temperature of calibrate AE sensor, have limited this detection technique and have further applied.
At present, also have the waveguide rod that is used to detect, because the reason of its shape, when detecting, problems such as thermograde variation and signal attenuation in practice, are seldom used weak effect, indeterminacy.
Summary of the invention
Technical matters to be solved by this invention is at above-mentioned the deficiencies in the prior art, and provides a kind of temperature damping big, the waveguide rod that is used for acoustic emission detection that the acoustical signal decay is little.
For addressing the above problem, the technical solution used in the present invention is: a kind of waveguide rod that is used for acoustic emission detection, comprise waveguide rod main body and two links, first link is connected with testee, second link is connected with calibrate AE sensor, it is characterized in that: described waveguide rod main body be shaped as solid of revolution, the both sides outline line that is symmetrical in the centre of gyration satisfies Hyperbolic Equation, that is: A=5~15 wherein, b=5~15.
Be connected with testee for the ease of waveguide rod, be provided with a magnet at first link of waveguide rod.
Compared with prior art, the main body of waveguide rod of the present invention is a solid of revolution, and its profile satisfies Hyperbolic Equation, when the one end is connected with testee, the other end is with after calibrate AE sensor is connected, the temperature of testee is after waveguide rod is transmitted, and thermograde changes fast, and promptly the temperature damping is fast, can not impact calibrate AE sensor, simultaneously, the decay of the acoustical signal of transmission is little, the measuring accuracy height.
Description of drawings
Fig. 1 is the structural representation of waveguide rod of the present invention.
Fig. 2 is that waveguide rod thermograde of the present invention changes synoptic diagram.
Fig. 3 is a waveguide rod signal attenuation synoptic diagram of the present invention.
Fig. 4 is that cylindrical wave guide rod thermograde changes synoptic diagram.
Fig. 5 is a cylindrical wave guide rod signal attenuation synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated:
Waveguide rod of the present invention is a sound conduction device in the acoustic emission detection, as shown in Figure 1, comprises waveguide rod main body 1 and two links.Waveguide rod main body 1 material is a carbon steel, and it is shaped as solid of revolution, and two ends are thick, and middle thin, the cambered surface of solid of revolution meets Hyperbolic Equation, that is: A=5~15 wherein, b=5~15.A link of two links is steel plates 2 of middle band circular hole, and steel plate is equipped with magnet 3 for one section, and waveguide rod main body 1 one ends embed in the fixed part hole, and links to each other with steel plate 2 with welding method.
During use, link to each other with testee by magnet 3, the other end links to each other with sensor.Waveguide rod and testee, sensor touching position all need to use special-purpose couplant.
This waveguide rod main part adopts hyp cambered surface, through signal and temperature test, can effectively avoid signal significantly to decay, and can significantly reduce the transmission of heat simultaneously, and coincidence senser is to the requirement of signal and temperature.The gradient of the signal attenuation in the waveguide rod, testing sensor sensitivity and temperature result data after tested sees Table 1.
Table 1 high temperature waveguide rod acoustical behavior testing experiment data (signal intensity and temperature) unit: dB, ℃
Annotate: test ambient temperature is 17 ℃
Having the hyperbolic wave guide rod, to have a temperature damping big, and the advantage that the acoustical signal decay is little has solved that not have hyperbolic wave guide rod temperature damping little, the deficiency that the acoustical signal decay is big.Hyperbolic wave guide rod thermograde changes and the acoustical signal attenuation is seen Fig. 2, Fig. 3.Do not contain variation of hyperbolic wave guide rod thermograde and acoustical signal attenuation and see Fig. 4, Fig. 5.

Claims (2)

1. waveguide rod that is used for acoustic emission detection, comprise waveguide rod main body and two links, first link is connected with testee, second link is connected with calibrate AE sensor, it is characterized in that: described waveguide rod main body be shaped as solid of revolution, the both sides outline line that is symmetrical in the centre of gyration satisfies Hyperbolic Equation, that is: A=5~15 wherein, b=5~15.
2. the waveguide rod that is used for acoustic emission detection according to claim 1 is characterized in that: be provided with a magnet at described first link.
CN200910234666A 2009-11-26 2009-11-26 Wave guide rod for acoustic emission testing CN101726543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910234666A CN101726543A (en) 2009-11-26 2009-11-26 Wave guide rod for acoustic emission testing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910234666A CN101726543A (en) 2009-11-26 2009-11-26 Wave guide rod for acoustic emission testing

Publications (1)

Publication Number Publication Date
CN101726543A true CN101726543A (en) 2010-06-09

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ID=42447742

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200910234666A CN101726543A (en) 2009-11-26 2009-11-26 Wave guide rod for acoustic emission testing

Country Status (1)

Country Link
CN (1) CN101726543A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102621231A (en) * 2012-03-27 2012-08-01 重庆大学 Large simulation test acoustic emission device for multi field coupling coal mine dynamic disaster
CN103454350A (en) * 2013-09-13 2013-12-18 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline
CN108799846A (en) * 2018-07-06 2018-11-13 中国核动力研究设计院 A kind of nuclear power station pressure pipeline acoustic emission detection device and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102621231A (en) * 2012-03-27 2012-08-01 重庆大学 Large simulation test acoustic emission device for multi field coupling coal mine dynamic disaster
CN102621231B (en) * 2012-03-27 2013-10-23 重庆大学 Large simulation test acoustic emission device for multi field coupling coal mine dynamic disaster
CN103454350A (en) * 2013-09-13 2013-12-18 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline
CN103454350B (en) * 2013-09-13 2015-06-24 中国石油大学(华东) Waveguide rod fixing device for acoustic emission inspection of pipeline
CN108799846A (en) * 2018-07-06 2018-11-13 中国核动力研究设计院 A kind of nuclear power station pressure pipeline acoustic emission detection device and method

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