CN106813993A - Component fatigue test data monitoring method based on sound ultrasound and acoustic emission - Google Patents
Component fatigue test data monitoring method based on sound ultrasound and acoustic emission Download PDFInfo
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- CN106813993A CN106813993A CN201710026054.9A CN201710026054A CN106813993A CN 106813993 A CN106813993 A CN 106813993A CN 201710026054 A CN201710026054 A CN 201710026054A CN 106813993 A CN106813993 A CN 106813993A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0064—Initiation of crack
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses the component fatigue test data monitoring method based on sound ultrasound and acoustic emission.Monitoring system sets up communication with fatigue tester, and switching circuit realizes that sound ultrasound detection automatically switches with acoustic emission monitor(ing) pattern according to fatigue tester working condition；Sound ultrasound detection and acoustic emission monitor(ing) are realized using four PZT (piezoelectric transducer)s on test specimen, fatigue tester loading is automatically performed, component performance status data detection during the monitoring of component crack data and static load in uninstall process.It is that component fatigue experiment and research material fatigue damage characteristic provide more rich test data the invention provides the automatic monitoring scheme of component crackle and mechanical performance data during a kind of more comprehensively fatigue test.
Description
Technical field
The present invention relates to a kind of component fatigue Test Data Collecting and monitoring method, specially sent out based on sound-ultrasound and sound
Penetrate the component fatigue test data monitoring method of technology.
Background technology
Fatigue fracture is one of principal mode of mechanical component failure.When mechanical component bears alternate load or strain, meeting
Cause local stress to change and internal flaw development so that mechanical properties decrease, or even cause component fatigue to be broken, and then trigger
Security incident.Therefore, carry out fatigue test to the key member of visual plant, and further investigate its fatigue properties and have and compel to be essential
Data acquisition in terms of asking in current fatigue test about fatigue crack, component performance is main visually inspecting and simple metering
Based on, i.e., whether there is crackle by naked-eye observation test specimen, or the detection crackle size such as micrometer is used by shutting down
Deng.These methods have that efficiency is low, are difficult to the limitation such as automation, it is difficult to obtain fatigue crack initiation, extension and be broken
Overall process data, and obtain data type it is single.To realize, to fatigue crack monitor in real time, authorizing publication number
CN203572806U, authorizes the publication date patent document on April 30 in 2014 to disclose a kind of fatigue crack on-line detecting system,
With the germinating of real-time monitoring fatigue crack and extension, and can in real time obtain tired by microscopic image acquisition device by the system
The picture signal of labor crackle, above-mentioned acoustic emission detection system only it is observed that in loading procedure fatigue crack change, it is impossible to obtain
Crackle status information of the primary member under static load and unloading, and it is difficult to know the mechanical property change of material for test.Application
Publication No. CN102253087A, date of publication is that the patent document on November 23 in 2011 discloses a kind of fatigue crack growth rate
Self-operated measuring unit and method, by measuring the situation that geosutures are broken successively with crack Propagation in sample, obtain
Sample crack Propagation parameter, is processed by industrial computer, draws fatigue crack growth rate, but the method can only provide fatigue
The one-sided information of crack growth rate, it is impossible to for the research of component fatigue damage feature provides more rich more fully fatigue test number
According to, it is therefore desirable to a kind of detection method that more comprehensively fatigue data can be provided.
The content of the invention
The present invention is to provide the component fatigue test data monitoring method based on sound-ultrasound and acoustic emission, the method
The germinating of test specimen fatigue crack in loading and uninstall process in fatigue test can not only be monitored by acoustic emission
And extension, moreover it is possible to the status information and its mechanical property of specimen crack are believed when detecting fatigue test static load by Acousto-ultrasonic approach
Breath.
The technical solution adopted by the present invention：Component fatigue test data monitoring side based on sound-ultrasound and acoustic emission
Method, the monitoring device that it is used includes fatigue tester, test specimen, industrial computer, four PZT (piezoelectric transducer)s, ultrasonic signal hairs
Raw device, sound emission capture card and switching circuit.Four PZT (piezoelectric transducer)s are separately mounted to the test specimen two ends and both sides, and
Couplant is filled between PZT (piezoelectric transducer) and test specimen, supersonic signal generator passes through two of switching circuit and test specimen one end
PZT (piezoelectric transducer) is connected, and two PZT (piezoelectric transducer)s of the test specimen other end are sent out by bandpass filter, preamplifier and sound
Capture card connection is penetrated, sound emission capture card is connected with industrial computer, and industrial computer sets up communication with fatigue tester, and industrial computer can lead to
Cross the work for obtaining fatigue tester working condition to control switching circuit.
The switching circuit is as shown in figure 3, including controller, resistance R, NPN transistor, diode, relay.Wherein control
Device processed is connected with industrial computer, and the fixed contact end for switching K1, K2 is connected with two PZT (piezoelectric transducer)s of test specimen one end respectively, contact
A, c end are connected with supersonic signal generator, and contact b, d end is connected with wave filter, and switch K1, K2 are respectively with contact b, d closure
Its original state, its breaker in middle K1, K2 can be switched over manually.When test specimen is loaded, industrial computer by with fatigue test
Machine is communicated, and knows that fatigue tester is in stress state, is sent to controller and is waited instruction, relay coil no power, switch
K1, K2 are failure to actuate, and monitoring system is in acoustic emission monitor(ing) pattern, and when test specimen static load, industrial computer can know tired examination
Test machine and be in static load state, instructed to controller sending action, relay coil is powered, switch K1, K2 action, at monitoring system
In acousto-ultrasonic testing pattern.
When being loaded to test specimen, monitoring system is in acoustic emission monitor(ing) pattern, by PZT (piezoelectric transducer) Real-time Collection
Due to the acoustic emission signal that fatigue crack initiation, extension are produced in test specimen, through band-pass filter and preamplifier
Amplify, received by sound emission capture card, then be sent to industrial computer and stored, when test specimen static load, monitoring system switching
To acousto-ultrasonic testing pattern, pumping signal is produced by supersonic signal generator, be converted into surpassing through coupled PZT (piezoelectric transducer)
In the incoming test specimen of sound wave, then the incoming test specimen other end PZT (piezoelectric transducer), through band-pass filter and preceding storing
Big device amplifies, and is received by sound emission capture card, then is sent to industrial computer and is stored.
With loaded cycle is carried out on test specimen, until test specimen fracture terminates experiment.The sound that will be recorded in industrial computer
Transmission signal is extracted with sound-ultrasonic signal, and treatment is analyzed respectively.
The present invention compared with prior art, has the following advantages that：
Be automatically performed fatigue tester loading, component performance during the monitoring of component crack data and static load in uninstall process
The detection of status data, processes the sound emission and sound-ultrasonic signal for collecting by analysis, can know that fatigue crack is distributed feelings
Condition, crack number growth rate and the information such as test specimen mechanical property change in process of the test.Thus can be to tested
Part carries out dynamic evaluation, is that component fatigue experiment and material fatigue damage research provide more fully test data.
Brief description of the drawings
Fig. 1 is fatigue test monitoring system schematic diagram；
Fig. 2 is PZT (piezoelectric transducer) layout drawing；
Fig. 3 is switching circuit schematic diagram；
Fig. 4 is acoustic emission monitor(ing) pattern schematic diagram；
Fig. 5 is acousto-ultrasonic testing pattern schematic diagram.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As Fig. 1 with as shown in Fig. 2 the component fatigue test data based on sound-ultrasound and acoustic emission in the present invention
Monitoring method, the monitoring device that it is used includes fatigue tester (1), test specimen (2), industrial computer (5), PZT (piezoelectric transducer)
(9), PZT (piezoelectric transducer) (10), PZT (piezoelectric transducer) (11), PZT (piezoelectric transducer) (12), supersonic signal generator (4), sound emission collection
Card (6) and switching circuit (3).Four PZT (piezoelectric transducer)s are separately mounted to the test specimen (2) two ends and two as shown in Figure 2
Side, is filled with couplant between PZT (piezoelectric transducer) and test specimen, supersonic signal generator (4) is by switching circuit (3) and test specimen
(2) PZT (piezoelectric transducer) (9) of one end, PZT (piezoelectric transducer) (11) connection, the PZT (piezoelectric transducer) (10) of the test specimen other end, piezoelectricity
Transducer (12) is connected by bandpass filter (8), preamplifier (7) with sound emission capture card (6), sound emission capture card
(6) it is connected with industrial computer (5), industrial computer (5) sets up communication with fatigue tester (1).
As shown in figure 3, the switching circuit includes controller (31), resistance (32), NPN transistor (33), diode
(34), relay (35), when test specimen is loaded, from industrial computer (5) to Wait Orders, controller (31) such as controller (31) transmissions
To circuit input low level, relay coil no power switchs K1, K2 respectively with contact b, d contacts, device is in such as Fig. 4 institutes
Show acoustic emission monitor(ing) pattern, during test specimen static load, from industrial computer (5) to controller (31) sending action order, controller
(31) to circuit input high level, relay coil is powered, and switchs K1, K2 respectively with contact a, c contacts, device is in such as Fig. 5
Shown acousto-ultrasonic testing pattern.
Below by taking aluminium alloy test specimen as an example, specific implementation process of the invention is illustrated.What this example was used
Supersonic signal generator (4) driving frequency scope is 100kHz-1MHz, driving voltage is 300V, the PZT (piezoelectric transducer) center
Frequency is 500KHZ, and the bandpass filter centre frequency is 1050KHz, and passband width is 1.9MHz, the acoustic emission signal
Capture card (6) selects PCI-2 data acquisition cards, and the preamplifier (7) selects 2/4/6 type, multiplication factor to select 40 times, coupling
Mixture selects vaseline.
First, acousto-ultrasonic testing pattern and acoustic emission monitor(ing) pattern are debugged and is calibrated, detailed process is as follows：Hand
Dynamic closing relay switch so that monitoring system is in acousto-ultrasonic testing pattern, is produced by supersonic signal generator (4)
The sinusoidal periodic signal of 500kHz encourages PZT (piezoelectric transducer) (9), PZT (piezoelectric transducer) (11), observation PZT (piezoelectric transducer) (10), piezoelectricity
The reception signal of transducer (12), adjustment PZT (piezoelectric transducer) (9), PZT (piezoelectric transducer) (10), PZT (piezoelectric transducer) (11), piezoelectric energy-conversion
The couple state of device (12) so that receive signal amplitude maximum；Then hand reset relay is switched so that monitoring system is in
Acoustic emission monitor(ing) pattern, is adjusted so that receive signal energy maximum using the experiment of disconnected lead to each parameter in sound emission software.
According to《GB/T 3075-2008 Metal Material Fatigues test axial force control method》, using rectangle as shown in Figure 2
The standard specimen in section, by maximum stress σ in the operation interface of fatigue testermaxIt is set to 100KN, stress ratioFrom sine waveform, frequency is set to 2.5Hz, and wherein stress ratio R represents any one list in fatigue test
The minimum stress σ of circulationminWith maximum stress σmaxRatio.
Secondly, fatigue test and fatigue data monitoring are started.
When test specimen (2) is loaded, industrial computer (5) is communicated by with fatigue tester (1), knows fatigue tester
(1) in stress state, industrial computer (5) is failure to actuate to the Wait Orders such as controller (31) transmission, switching circuit (3), monitoring system
In acoustic emission monitor(ing) pattern, by PZT (piezoelectric transducer) (9), PZT (piezoelectric transducer) (11), PZT (piezoelectric transducer) (10) and piezoelectric energy-conversion
Due to the acoustic emission signal that fatigue crack initiation, extension are produced in device (12) Real-time Collection test specimen, through bandpass filter (8)
Filtering and preamplifier (7) enhanced processing, are received, then be sent to industrial computer (5) and stored by sound emission capture card (6).
When test specimen static load, industrial computer (5) is communicated by with fatigue tester (1), knows fatigue tester (1) place
In static load state, from industrial computer (5) to controller (31) sending action order, switching circuit (3) action, monitoring system enters
Acousto-ultrasonic testing pattern, supersonic signal generator (4) successively produces excitation letter to PZT (piezoelectric transducer) (9), PZT (piezoelectric transducer) (11)
In number incoming test specimen (2), then respectively by PZT (piezoelectric transducer) (10), the PZT (piezoelectric transducer) of reception sound-ultrasonic signal
(12) reception sound-ultrasonic signal, through bandpass filter (8) filtering and preamplifier (7) enhanced processing, by sound emission capture card
(6) receive, then be sent to industrial computer (5) and stored.
Finally, the loaded cycle of fatigue test is carried out, until after test specimen is broken or reaches the cycle-index of setting, terminating examination
Test.The acoustic emission signal that will be recorded in industrial computer is extracted with sound ultrasonic signal, for follow-up component fatigue process of the test
Middle crackle state change and the analysis of component performance change.
Claims (2)
1. the component fatigue test data monitoring method of sound-ultrasound and acoustic emission is based on, it is characterised in that the prison for being used
Surveying device includes fatigue tester (1), test specimen (2), industrial computer (5), PZT (piezoelectric transducer) (9), PZT (piezoelectric transducer) (10), pressure
Electric transducer (11), PZT (piezoelectric transducer) (12), supersonic signal generator (5), sound emission capture card (6) and switching circuit (3), institute
Two ends and both sides that four PZT (piezoelectric transducer)s are separately mounted to the test specimen (2) are stated, the supersonic signal generator (4) is led to
Cross the PZT (piezoelectric transducer) (9) of switching circuit (3) and test specimen (2) one end, PZT (piezoelectric transducer) (11) to be connected, test specimen (2)
PZT (piezoelectric transducer) (10), the PZT (piezoelectric transducer) (12) of the other end are by bandpass filter (8), preamplifier (7) and sound emission
Capture card (6) is connected, and the industrial computer (5) is connected with sound emission capture card (6), and sets up communication with fatigue tester (1).
2. the component fatigue test data monitoring method based on sound-ultrasound and acoustic emission according to claim 1, its
It is characterised by：Industrial computer (5) controls switching circuit (3), automatic switchover sound-ultrasound according to the mode of operation of fatigue tester (1)
Detection and acoustic emission monitor(ing) pattern, when being loaded to test specimen (2), monitoring system is in acoustic emission monitor(ing) pattern, by pressure
Electric transducer (9), PZT (piezoelectric transducer) (10), PZT (piezoelectric transducer) (11) and PZT (piezoelectric transducer) (12), sound emission capture card (6) are in real time
Due to the sound emission data that fatigue crack initiation, extension are produced, in test specimen (2) static load, prison in collection test specimen (2)
Examining system is switched to acousto-ultrasonic testing pattern, by supersonic signal generator (4) successively to PZT (piezoelectric transducer) (9), piezoelectric energy-conversion
Device (11) is produced in the incoming test specimen of pumping signal (2), then respectively by the PZT (piezoelectric transducer) of reception sound-ultrasonic signal
(10), PZT (piezoelectric transducer) (12) reception sound-ultrasonic signal, the sound emission of collection and sound-ultrasound data are all stored in industrial computer (5)
In, by data processing, obtain the crackle of test specimen (2) and the delta data of fatigue properties.
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| CN201710026054.9A CN106813993B (en) | 2017-01-13 | 2017-01-13 | Fatigue test component state monitoring method based on sound-ultrasound and sound emission technology |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340229A (en) * | 2017-06-22 | 2017-11-10 | 中国矿业大学 | A kind of experimental provision and method for testing coal and rock dynamics |
| CN109975134A (en) * | 2019-04-02 | 2019-07-05 | 北京理工大学 | A kind of torsional fatigue damage check test platform |
| CN110261480A (en) * | 2019-07-16 | 2019-09-20 | 中国工程物理研究院化工材料研究所 | A kind of system and method for quick test piezoelectric material acoustic emission response performance |
| CN111323317A (en) * | 2020-04-13 | 2020-06-23 | 北京大学 | High-frequency fatigue test device and method based on piezoelectric double-stack resonance driving |
| CN111537599A (en) * | 2020-05-28 | 2020-08-14 | 中国特种设备检测研究院 | Magneto acoustic emission detection method for fatigue damage of ferromagnetic metal component |
| CN112268854A (en) * | 2020-10-29 | 2021-01-26 | 中国石油天然气集团有限公司 | Pipe corrosion resistance evaluation device, installation method and evaluation method in corrosive environment |
| CN113252794A (en) * | 2021-06-03 | 2021-08-13 | 沈阳工业大学 | Acoustic emission crack monitoring method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111537599B (en) * | 2020-05-28 | 2024-03-19 | 中国特种设备检测研究院 | Magneto acoustic emission detection method for fatigue damage of ferromagnetic metal component |
| CN112268854A (en) * | 2020-10-29 | 2021-01-26 | 中国石油天然气集团有限公司 | Pipe corrosion resistance evaluation device, installation method and evaluation method in corrosive environment |
| CN112268854B (en) * | 2020-10-29 | 2024-07-02 | 中国石油天然气集团有限公司 | Pipe corrosion resistance evaluation device, installation method and evaluation method in corrosive environment |
| CN113252794A (en) * | 2021-06-03 | 2021-08-13 | 沈阳工业大学 | Acoustic emission crack monitoring method and system |
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