CN106680379A - Bracket device for calibrating acoustic emission sensor employing broken lead method - Google Patents
Bracket device for calibrating acoustic emission sensor employing broken lead method Download PDFInfo
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- CN106680379A CN106680379A CN201710176841.1A CN201710176841A CN106680379A CN 106680379 A CN106680379 A CN 106680379A CN 201710176841 A CN201710176841 A CN 201710176841A CN 106680379 A CN106680379 A CN 106680379A
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- acoustic emission
- hollow cylinder
- push rod
- emission sensor
- pencil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention relates to the technical field of acoustic emission, in particular to a bracket device for calibrating an acoustic emission sensor employing a broken lead method. The bracket device comprises a pedestal, a hollow cylinder, wherein the bottom surface of the hollow cylinder is arranged on the pedestal; the angle formed by the center axis of the hollow cylinder and the pedestal is 60 degrees, and a cylindrical push rod is arranged to penetrate into the hollow cylinder from the top end along the center axis of the hollow cylinder; a compression spring is arranged at the bottom end of the cylindrical push rod; a square gasket is arranged between the cylindrical push rod and the compression spring and the edge length of the square gasket is equal to the diameter of the cylindrical push rod; and a semi-cylindrical pencil groove with an upward opening is vertically arranged in the top end of the cylindrical push rod. According to the bracket device, a pencil lead and the surface of a test piece are always in an included angle of 30 degrees in the whole breaking process of the pencil lead and the calibration accuracy of the acoustic emission sensor is scientifically improved; and the problem that the pencil lead collides with the surface of the test piece to generate a secondary interference signal due to the inertial effect at the moment of breakage is solved, the experiment efficiency is effectively improved and the economic loss caused by multiple experiments is avoided.
Description
Technical field
The present invention relates to acoustic emission field, specially a kind of holder device of disconnected lead method demarcation acoustic emission sensor.
Background technology
Acoustic emission sensor is the monitoring device of the acoustic emission signal for receiving material or inside configuration, the acoustic emission of coming of new
Sensor came into operation after a period of time before formally dispatching from the factory or formally, was both needed to demarcate it or calibrated, to guarantee reality
Border performance is up to standard.Pencil break method is the most frequently used acoustic emission sensor scaling method, and easy to operate, economical rationality can be fine
Ground facilitates acoustic emission sensor to demarcate or calibrate using disconnected lead stamp onomatopoeia transmission signal.
During acoustic emission sensor is demarcated or calibrated to disconnected lead method,《Metal pressure container acoustic emission detection and result are commented
Survey method》(GB/T18182-2000) regulation uses the HB pencil-leads of Ф 0.5mm, core-extending about 2.5mm, pen core and test block
Surface need to be in 30 ° of angles.However, demarcate receiving artificial shadow with lead operating process of in calibration process, breaking in actual acoustic emission sensor
Ring and there are two subject matters：One is that, by man's activity, each pencil-lead snap-off process can not be in accurately 30 ° with test block surface
Angle, produces trigger error；Two is that, by inertia effects, pencil-lead fractures moment, and pencil stub is easily touched with test block surface
Hit, produce secondary interference signal.
Although patent CN102507744A discloses a kind of acoustic emission device of detection damage failure of carbon fiber composite material
And method, the feasibility for utilizing " pencil-lead rupture " to demarcate acoustic emission sensor is elaborated, depict the demarcation of pencil-lead break source
Method schematic diagram, but undeclared how to guarantee in experimentation pencil-lead horizontal by 30 ° of angles and how to avoid pencil stub from touching
Hit the secondary interference signal of generation；Patent CN105866252A discloses a kind of for middle-size and small-size rectangular shape casing acoustic emission source positioning
Method, highlighting the graphite pencil core during " disconnected lead experiment " with tank surface to be measured in 30 ° of angles, but will not provide tool
Body operational approach.
In fact, in the case of not by extraneous aid, artificial lead disconnected manually basically can not ensure the lead that breaks every time
Angle is in 30 ° of angles, and usually occurs test block surface by the secondary interference signal phenomenon of pencil stub collision output.
In sum, it is necessary to the holder device that a kind of disconnected lead method demarcates acoustic emission sensor is designed, to meet acoustic emission
The demand of demarcation or the calibration of sensor.
The content of the invention
Cannot precisely guarantee that disconnected lead angle clashes into survey with the easy nib that produces when demarcating acoustic emission sensor for disconnected lead method
The technical problem of surface of test piece, it is an object of the invention to provide one kind the disconnected lead of quasi- angle and can avoid producing written impact test
The holder device on part surface.
The technical scheme is that, a kind of disconnected lead method demarcates the holder device of acoustic emission sensor, including pedestal, bottom surface
Hollow cylinder on pedestal, central axis and the pedestal angulation of the hollow cylinder are 60 °, and are provided with cylinder push rod edge
Hollow cylinder central axis is penetrated in hollow cylinder from top, and the bottom of the cylinder push rod is provided with compression spring, and cylinder push rod with
Square washer, the length of side of square washer and the equal diameters of cylinder push rod are provided between compression spring；The top of the cylinder push rod
The semicolumn pencil groove of end right angle setting opening upwards.
Preferably, what the square washer was relative is respectively provided on two sides with the journal stirrup for protruding laterally.
Preferably, being provided with the hollow cylinder can accommodate the approaching channel that two journal stirrups are slided up and down.
Preferably, the diameter of the semicolumn pencil groove is consistent for the HB pencil diameters of 0.5mm with lead for retractable pencil.
The invention has the advantages that：
(1) difficulty of processing of the present invention is little, with low cost, easy to operate, reusable, is mainly used in acoustic emission sensor
The disconnected lead experiment demarcated or calibrate.
(2) holder device ensure that pen core and test block surface are all the time in 30 ° of angles, section in pencil-lead complete process of fracture
Improve the accuracy of acoustic emission sensor demarcation with learning.
(3) support unit overcomes pencil-lead fracture moment and is collided generation two by inertia effects and test block surface
A difficult problem for secondary interference signal, effectively increases conventional efficient and avoids the economic loss that many experiments bring.
Description of the drawings
Fig. 1 is the schematic diagram of holder device of the present invention；
Fig. 2 is the structural representation of holder device of the present invention；
Fig. 3 is the A-A schematic diagrams in Fig. 2；
Fig. 4 is the B-B schematic diagrams of Fig. 2；
Fig. 5 is embodiment experimental facilitiess order of connection figure；
Fig. 6 is commonly disconnected lead experimental result record typical interface figure；
Fig. 7 is using the disconnected lead experimental result record typical interface figure of holder device of the present invention.
Specific embodiment
The present invention will be described in detail according to exemplary embodiment below, described specific embodiment only enters to the present invention
Row is illustrated, not to limit the present invention.
As shown in figs 2-4, a kind of disconnected lead method demarcates the holder device of acoustic emission sensor, including pedestal 6, bottom surface is installed
Hollow cylinder 5 on pedestal 6, central axis and the angulation of pedestal 6 of hollow cylinder 5 are 60 °, and are provided with cylinder push rod 2 along sky
Heart cylinder central axis is penetrated in hollow cylinder 5 from top, and the bottom of cylinder push rod 2 is provided with compression spring 4, and cylinder push rod 2 and pressure
Square washer 3, the length of side of square washer 3 and the equal diameters of cylinder push rod 2 are provided between contracting spring 4；The top of cylinder push rod 2
The semicolumn pencil groove 1 of right angle setting opening upwards.
Square washer 3 it is relative be respectively provided on two sides with the journal stirrup for protruding laterally, be embedded in the built-in approaching channel of hollow cylinder 5
In, prevent from ejecting hollow cylinder 5 under spring movement pressured state jointly with approaching channel top.
Being provided with hollow cylinder 5 can accommodate the approaching channel that two journal stirrups are slided up and down, and facilitate the pressurized rear square washer of compression spring 4
Journal stirrup on 3 is moved back and forth along built-in approaching channel.
The diameter of the semicolumn pencil groove 1 is consistent for the HB pencil diameters of 0.5mm with lead for retractable pencil.Pedestal 6 be taper, taper
Pedestal 6 is connected with the level of hollow cylinder 5 in 60 ° of angles, and junction point is located at 1/3rd of taper pedestal upper section circular diameter.
Schematic diagram as shown in Figure 1, break pencil 7, spring support 8, the angle-determining of bracket base 9, holder device ensure that
Pen core and test block surface are in 30 ° of angles all the time in pencil-lead complete process of fracture.
The present invention proposes contrast commonly disconnected lead experiment and the disconnected lead experimental calibration acoustic emission sensor actual effect of support, experiment
Using equipment as shown in figure 5, specific implementation step is as follows：
Step one：Experimental facilitiess A- is tested into steel plate, B- acoustic emission sensors, C- preamplifiers, D-PCI-2 acoustic emissions
Acquisition Instrument and E- computers are sequentially connected, and wherein B surface need to coat couplant, it is ensured that be connected with steel plate coupling.
Step 2：Disconnected lead 20 times is carried out on steel plate for the HB pencils simulation acoustic emission signal of 0.5mm using 1 lead for retractable pencil.
Step 3：Simulated sound in the semicolumn pencil groove of support is lain in a horizontal plane in using HB pencil of 1 lead for retractable pencil for 0.5mm
Transmission signal carries out disconnected lead 20 times on steel plate.
Step 4：Commonly disconnected lead experiment and the disconnected lead experimental result of support show：Commonly disconnected lead tests 20 empirical average width
It is worth for 90.23dB, and occurs pencil stub touching test block superficial phenomenon for up to 14 times；The disconnected lead of support is tested 20 average amplitudes and is
96.76dB, and do not occur once touching phenomenon, the two experiment typical consequence record is respectively as shown in Figure 6 and Figure 7.
Jing is analyzed, the disconnected lead experiment of support, not only can ensure that 30 ° of disconnected lead angles, and pencil stub can be avoided to touch test block
Surface produces secondary interference signal, can effectively lift the precision that disconnected lead method demarcates acoustic emission sensor.
The foregoing is only preferred embodiments of the present invention, not with the present invention as limit, it is all the present invention spirit and
Within principle, various corresponding changes can be made according to the present invention, but corresponding modification should all belong to the right appended by the present invention
The protection domain of requirement.
Claims (5)
1. a kind of disconnected lead method demarcates the holder device of acoustic emission sensor, it is characterized in that, including pedestal (6), bottom surface are arranged on platform
Hollow cylinder (5) on seat (6), the central axis of the hollow cylinder (5) is 60 ° with pedestal (6) angulation, and is provided with cylinder and pushes away
Bar (2) is penetrated in hollow cylinder (5) along hollow cylinder central axis from top, and the bottom of the cylinder push rod (2) is provided with compression spring
(4) square washer (3), the length of side and the cylinder push rod of square washer (3), and between cylinder push rod (2) and compression spring (4) are provided with
(2) equal diameters；Semicolumn pencil groove (1) of the top right angle setting opening upwards of the cylinder push rod (2).
2. lead method of breaking according to claim 1 demarcates the holder device of acoustic emission sensor, it is characterized in that, the square washer
(3) it is relative to be respectively provided on two sides with the journal stirrup for protruding laterally.
3. lead method of breaking according to claim 2 demarcates the holder device of acoustic emission sensor, it is characterized in that, the hollow cylinder
(5) being provided with can accommodate the approaching channel that two journal stirrups are slided up and down.
4. disconnected lead method according to claim 1 or claim 2 demarcates the holder device of acoustic emission sensor, it is characterized in that, the semicircle
The diameter of post pencil groove (1) is consistent for the HB pencil diameters of 0.5mm with lead for retractable pencil.
5. disconnected lead method according to claim 1 or claim 2 demarcates the holder device of acoustic emission sensor, it is characterized in that, the pedestal
(6) it is taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176841.1A CN106680379B (en) | 2017-03-23 | 2017-03-23 | A kind of holder device of disconnected lead method calibration acoustic emission sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176841.1A CN106680379B (en) | 2017-03-23 | 2017-03-23 | A kind of holder device of disconnected lead method calibration acoustic emission sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106680379A true CN106680379A (en) | 2017-05-17 |
| CN106680379B CN106680379B (en) | 2019-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710176841.1A Expired - Fee Related CN106680379B (en) | 2017-03-23 | 2017-03-23 | A kind of holder device of disconnected lead method calibration acoustic emission sensor |
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| CN (1) | CN106680379B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272431A (en) * | 2020-03-06 | 2020-06-12 | 中国航发沈阳发动机研究所 | Automatic lead device that breaks of acoustic emission for whole quick-witted examination car of engine |
| CN116297879A (en) * | 2023-03-28 | 2023-06-23 | 中国矿业大学 | System and method for quantitatively calibrating sensitivity coefficient of acoustic emission sensor |
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| CN2708475Y (en) * | 2004-06-21 | 2005-07-06 | 郑建中 | A push button switch |
| JP2005181302A (en) * | 2003-11-25 | 2005-07-07 | Tokyo Electric Power Co Inc:The | Breakage detection method and detector for reinforcement in concrete structure |
| CN104483390A (en) * | 2014-12-23 | 2015-04-01 | 长沙理工大学 | Lead breaking device for generating multi-source acoustic emission analog signal |
| CN205009167U (en) * | 2015-08-21 | 2016-02-03 | 孟永江 | Novel hand -held type plank nailer |
-
2017
- 2017-03-23 CN CN201710176841.1A patent/CN106680379B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005181302A (en) * | 2003-11-25 | 2005-07-07 | Tokyo Electric Power Co Inc:The | Breakage detection method and detector for reinforcement in concrete structure |
| CN2708475Y (en) * | 2004-06-21 | 2005-07-06 | 郑建中 | A push button switch |
| CN104483390A (en) * | 2014-12-23 | 2015-04-01 | 长沙理工大学 | Lead breaking device for generating multi-source acoustic emission analog signal |
| CN205009167U (en) * | 2015-08-21 | 2016-02-03 | 孟永江 | Novel hand -held type plank nailer |
Non-Patent Citations (1)
| Title |
|---|
| 朱乐: "钢筋混凝土声发射损伤检测关键参数试验研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111272431A (en) * | 2020-03-06 | 2020-06-12 | 中国航发沈阳发动机研究所 | Automatic lead device that breaks of acoustic emission for whole quick-witted examination car of engine |
| CN116297879A (en) * | 2023-03-28 | 2023-06-23 | 中国矿业大学 | System and method for quantitatively calibrating sensitivity coefficient of acoustic emission sensor |
| CN116297879B (en) * | 2023-03-28 | 2024-05-24 | 中国矿业大学 | System and method for quantitatively calibrating sensitivity coefficient of acoustic emission sensor |
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| CN106680379B (en) | 2019-05-21 |
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Granted publication date: 20190521 Termination date: 20210323 |