CN206300859U - A kind of test system that material friction performance is tested and analyzed based on acoustic emission signal - Google Patents
A kind of test system that material friction performance is tested and analyzed based on acoustic emission signal Download PDFInfo
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- CN206300859U CN206300859U CN201621236872.9U CN201621236872U CN206300859U CN 206300859 U CN206300859 U CN 206300859U CN 201621236872 U CN201621236872 U CN 201621236872U CN 206300859 U CN206300859 U CN 206300859U
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Abstract
The utility model is related to a kind of test system that material friction performance is tested and analyzed based on acoustic emission signal, including the first clamper and the second clamper that are horizontally disposed with one on the other and relative can move back and forth, it is arranged on the piezoelectric transducer on the second clamper, the signal amplifier being sequentially connected electrically with piezoelectric transducer, signal picker and signal processor, piezoelectric transducer receives the friction acoustic emission signal between two antithesis samples, and the friction acoustic emission signal is converted into electric signal, after amplifying through signal amplifier, it is sent to signal picker, after carrying out analog-to-digital conversion, it is resent in signal processor, it is the spectrogram for obtaining friction acoustic emission signal by data processing.Compared with prior art, the utility model receives the acoustic emission signal produced by phase mutual friction between antithesis sample entirely through piezoelectric transducer, detection sensitivity is high, it is ensured that the precision and accuracy of test, is that design, processing of friction pair material etc. provide foundation.
Description
Technical field
The utility model belongs to material property analysis technical field, is related to a kind of test system, more particularly, to a kind of base
The test system of material friction performance is tested and analyzed in acoustic emission signal.
Background technology
Brake friction material is widely used in various movable machineries and equipment, plays the effect such as transmission, braking, deceleration.
Due to movable machinery and the difference of equipment, the mating material of friction pair is also different, and friction and wear behavior is not only in braking procedure
Depending on friction material in itself, and with mating material also there are much relations.Conventional research is in order to reach wanting for braking procedure
Ask, often concentrate in friction material raising in itself substantial amounts of energy, and the research to mating material is less.
It is well known that mating material refers to spouse's material that friction pair is constituted with friction material.It is existing right for analyzing
The method of even material friction performance is a kind of friction material of selection mostly, and different mating materials carries out friction and abrasion respectively
The test of energy, measures friction factor and wear rate, so that for the selection of mating material provides foundation.However, this analysis method
The frictional behaviour of mating material is simply judged from friction factor and these indexs of wear rate, it is not comprehensive enough, it is impossible to antithesis material
The frictional behaviour of material carries out dynamic monitoring.
Material or component are deformed or during crackle in loading process, and showing for strain energy is discharged in elastic wave form
As referred to as sound emission.Using acoustic emission signal is received, the technology of dynamic lossless inspection hand hay cutter, referred to as sound hair are carried out to material or component
Penetrate technology.Acoustic emission has turned into a kind of powerful of Analysis of Experimental Stress, such as in destructive test, can be used to detect
Crackle and research corrosion fracture process, and monitor the fatigue fracture spread scenarios of component etc..Acoustic emission can be also used for
The integrality of component is evaluated, the degree of danger of structure is judged.Sound emission Dynamic Non-Destruction Measurement is now widely used in engineering, tool
There is good application prospect.Therefore, in order to the frictional behaviour more fully to mating material is evaluated, it is possible to use sound emission
Technology gathers the friction acoustical signal between friction material and antithesis friction member, and binding signal analysis method is entered to friction acoustical signal
Row analysis, obtains its spectrogram, so as to realize the evaluation of mating material frictional behaviour.
The Chinese patent of Application No. 201610077798.9 discloses a kind of acted as reference mutual method and repaiies hard brittle material friction in advance
Secondary high-speed friction method of testing, the frictional disk for being first made hard brittle material carries out backing, using acted as reference mutual method to the friction
Disk and backing are processed, and the surface quality needed for reaching test is required with the depth of parallelism；Grinder tool clamping will be then connected with
On the fixture of device for force feedback, the friction testings such as ball-looping test, pin-looping test are carried out, frictional disk is right to specify rotating speed to rotate
Grinder tool is contacted with frictional disk and pressure is constant in testing setup value between the two, and test terminates to setting time, and measuring system exists
The physical quantitys such as frictional force, acoustic emission signal are gathered during this.Wherein, described measuring system be dynamometry and acoustic emission system,
Dynamometer, acoustic emission system, data collecting card and signal amplifier including the connection of mutual signal；It is described to have to grinder and dynamometry
Instrument is connected with acoustic emission system.What however, above-mentioned patent is not explicitly pointed out for acoustic emission system, i.e., specifically passed with
Sensor gathers acoustic emission signal, and the analysis on how to carry out follow-up frictional behaviour from acoustic emission signal, the patent does not have public affairs
Open specific solution.Compared to above-mentioned patent, the utility model uses PVDF piezoelectric film sensors, used as a kind of dynamic
Strain transducer, it has thin, and matter is soft, soft, can detect trickle signal, and and its it is durable, can undergo millions of times
Bending and vibration, price economy in addition；Secondly as PVDF sensors can detect trickle signal, therefore this practicality is new
Type is not limited to high-speed friction, even the trickle friction signal of low speed, remains able to detect；Meanwhile, the utility model
Test condition it is fairly simple, manipulate it is more convenient；Furthermore, the utility model is using friction acoustic emission signal processing system, energy
It is enough that time-domain signal is transformed into frequency-domain analysis, the quality of frictional behaviour is intuitively reflected by frequency spectrum.
Utility model content
The purpose of this utility model be exactly provided for the defect for overcoming above-mentioned prior art to exist a kind of simple structure,
Compact, measuring accuracy is high, and can comprehensively measure mating material frictional behaviour tests and analyzes material friction based on acoustic emission signal
The test system of energy.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of test system that material friction performance is tested and analyzed based on acoustic emission signal, the system includes water one on the other
Flat the first clamper that set and relative can move back and forth and the second clamper, the piezoelectric sensing being arranged on the second clamper
Signal amplifier, signal picker and signal processor that device and piezoelectric transducer are sequentially connected electrically, the first described clamping
Antithesis sample A to be tested and antithesis sample B is respectively fixed with device, the second clamper, described piezoelectric transducer receives antithesis
Friction acoustic emission signal between sample A and antithesis sample B, and the friction acoustic emission signal is converted into electric signal, through signal
After amplifier amplifies, signal picker is sent to, after carrying out analog-to-digital conversion through signal picker, is sent in signal processor,
The spectrogram of friction acoustic emission signal is obtained after data processing again.
Described piezoelectric transducer is PVDF piezoelectric membrane patch sensors.
Described piezoelectric transducer is fixed on the centre of the second clamper by binding agent.
Described the first clamper, the second clamper respectively with horizontally disposed first drive cylinder, the second drive cylinder
Drive connection, described the first drive cylinder, the second drive cylinder drive the first clamper and the second clamper relatively anti-respectively
To movement.
The first described clamper is provided with generating laser, and the second described clamper is provided with and generating laser phase
The laser range sensor of adaptation, the laser range sensor by circuit successively with signal amplifier, signal picker and
Signal processor is connected.
Described antithesis sample B is fixed at the centre position of piezoelectric transducer, antithesis sample A and antithesis sample B's
Initial relative position should ensure that both contacts area are as big as possible.
Described signal processor is based on signal analysis method by the friction sound emission between the mating material for collecting
Signal is processed, and such as carries out denoising with small echo, independent component analysis, with Hilbert-Huang transform or quick Fu
In leaf transformation etc. carry out analysis of spectrum, its spectrogram is obtained, so as to know the frictional behaviour of mating material.
In the utility model, material to be tested is mating material, must be the mating plate of friction material, and shape is not limited, and is rubbed
Fricting movement mode between material and mating material is not limited.In actual test, phase mutual friction between mating material, friction mode
Do not limit, so as to produce the acoustic emission signal of friction.The acoustic emission signal conversion that PVDF piezoelectric membranes patch sensor will be received
It is electric signal, after amplifying through signal amplifier, is sent to signal picker, after carrying out analog-to-digital conversion through signal picker, transmission
Into signal processor, then the spectrogram that friction acoustic emission signal is obtained after data processing.
The signal circuit that the utility model is used is noiselike signal transmission cable.
The operation principle of the utility model system is：
Antithesis sample A to be tested and antithesis sample B are separately fixed on the first clamper, the second clamper, then
By the relative spacing between laser range sensor adjustment antithesis sample A and antithesis sample B to setting value, start first and drive
Cylinder, the second drive cylinder drive the first clamper and the relative reverse movement of the second clamper respectively, so that antithesis sample A
With antithesis sample B phase mutual friction, now, piezoelectric transducer receives the friction sound emission letter between antithesis sample A and antithesis sample B
Number, and the acoustic emission signal that will be received is converted into electric signal, after amplifying or pre-process through signal amplifier, by signal transmission
Line is transferred to signal picker, after carrying out analog-to-digital conversion by signal picker, signal transacting is transferred to by signal transmission passage
Device, signal processor carries out the noise suppression preprocessings such as small echo, independent component analysis with signal processing software to the electric signal for receiving,
The spectrogram of signal is obtained with Hilbert-Huang transform, Fast Fourier Transform (FFT) etc., so as to know the frictional property of mating material
Energy.
Compared with prior art, the utility model overall structure is simple, compact, and antithesis sample is received by piezoelectric transducer
Between the acoustic emission signal that is produced by phase mutual friction, detection sensitivity is high, then is analyzed by signal processing method, obtains
The spectrogram of the acoustic emission signal that rubs, realizes evaluating more comprehensive, scientifically for mating material frictional behaviour, it is ensured that test
Precision and accuracy, are that design, processing of friction pair material etc. provide foundation.
Brief description of the drawings
Fig. 1 is the utility model overall structure diagram；
Description of symbols in figure：
1-the first clamper, the 2-the second clamper, 3-piezoelectric transducer, 4-signal amplifier, 5-signal acquisition
Device, 6-signal processor, 7-antithesis sample A, 8-antithesis sample B.
Specific embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment：
As shown in figure 1, a kind of test system that material friction performance is tested and analyzed based on acoustic emission signal, the system includes
The first clamper 1 that be horizontally disposed with one on the other and relative can move back and forth and the second clamper 2, it is arranged on the second clamper 2
On piezoelectric transducer 3 and piezoelectric transducer 3 signal amplifier 4, signal picker 5 and the signal transacting that are sequentially connected electrically
Device 6, is respectively fixed with antithesis sample A7 to be tested and antithesis sample B8, piezoelectric sensing on the first clamper 1, the second clamper 2
Device 3 receives the friction acoustic emission signal between antithesis sample A7 and antithesis sample B8, and the friction acoustic emission signal is converted into
Electric signal, after amplifying through signal amplifier 4, is sent to signal picker 5, after carrying out analog-to-digital conversion through signal picker 5, transmission
Into signal processor 6, then the spectrogram that friction acoustic emission signal is obtained after data processing.
Wherein, the first clamper 1 is provided with generating laser, and the second clamper 2 is provided with and is adapted with generating laser
Laser range sensor, the laser range sensor by circuit successively with signal amplifier 4, signal picker 5 and letter
Number processor 6 is connected.Piezoelectric transducer 3 is PVDF piezoelectric membrane patch sensors.Piezoelectric transducer 3 is fixed by binding agent
In the centre of the second clamper 2.
First clamper 1, the second clamper 2 are driven with horizontally disposed first drive cylinder, the second drive cylinder respectively
Connection, the first drive cylinder, the second drive cylinder drive the first clamper 1 and the relative reverse movement of the second clamper 2 respectively.
Described antithesis sample B is fixed at the centre position of piezoelectric transducer, antithesis sample A and antithesis sample B's
Initial relative position should ensure that both contacts area are as big as possible.
Described signal processor is based on signal analysis method by the friction sound emission between the mating material for collecting
Signal is processed, and such as carries out denoising with small echo, independent component analysis, with Hilbert-Huang transform or quick Fu
In leaf transformation etc. carry out analysis of spectrum, its spectrogram is obtained, so as to know the frictional behaviour of mating material.
The signal circuit that the present embodiment is used is noiselike signal transmission cable.In actual test, will first treat
The antithesis sample A7 and antithesis sample B8 of test are separately fixed on the first clamper 1, the second clamper 2, then by laser
Relative spacing between distance measuring sensor adjustment antithesis sample A7 and antithesis sample B8 to setting value, start the first drive cylinder,
Second drive cylinder drives the first clamper 1 and the relative reverse movement of the second clamper 2 respectively so that antithesis sample A7 with
Antithesis sample B8 phase mutual friction, now, piezoelectric transducer 3 receives the friction sound emission between antithesis sample A7 and antithesis sample B8
Signal, and the acoustic emission signal that will be received is converted into electric signal, after amplifying or pre-process through signal amplifier 4, by signal
Transmission line after carrying out analog-to-digital conversion by signal picker 5, letter is transferred to by signal transmission passage to signal picker 5
Number processor 6, signal processor 6 carries out small echo, independent component analysis etc. with signal processing software to the electric signal for receiving
Make an uproar pretreatment, the spectrogram of signal is obtained with Hilbert-Huang transform, Fast Fourier Transform (FFT) etc., so as to know mating material
Frictional behaviour.
The above-mentioned description to embodiment is to be understood that and use practicality for ease of those skilled in the art
It is new.Person skilled in the art obviously can easily make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiment without by performing creative labour.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art according to announcement of the present utility model, do not depart from improvement that the utility model category made and
Modification all should be within protection domain of the present utility model.
Claims (3)
1. it is a kind of based on acoustic emission signal test and analyze material friction performance test system, it is characterised in that the system includes
The first clamper (1) and the second clamper (2) that are horizontally disposed with one on the other and relative can move back and forth, it is arranged on the second clamping
Signal amplifier (4), signal picker (5) that piezoelectric transducer (3) and piezoelectric transducer (3) on device (2) are sequentially connected electrically
And signal processor (6), it is respectively fixed with antithesis sample to be tested on described the first clamper (1), the second clamper (2)
A (7) and antithesis sample B (8), described piezoelectric transducer (3) receive rubbing between antithesis sample A (7) and antithesis sample B (8)
Acoustic emission signal is wiped, and the friction acoustic emission signal is converted into electric signal, after amplifying through signal amplifier (4), be sent to letter
Number collector (5), after carrying out analog-to-digital conversion through signal picker (5), is sent in signal processor (6), then through data processing
The spectrogram of friction acoustic emission signal is obtained afterwards；
Described piezoelectric transducer (3) is PVDF piezoelectric membrane patch sensors；
Described the first clamper (1) is provided with generating laser, and described the second clamper (2) is provided with and generating laser
The laser range sensor being adapted, the laser range sensor by circuit successively with signal amplifier (4), signal picker
And signal processor (6) is connected (5).
2. it is according to claim 1 it is a kind of based on acoustic emission signal test and analyze material friction performance test system, its
It is characterised by, described piezoelectric transducer (3) is fixed on the centre of the second clamper (2) by binding agent.
3. it is according to claim 1 it is a kind of based on acoustic emission signal test and analyze material friction performance test system, its
It is characterised by, described the first clamper (1), the second clamper (2) drives with horizontally disposed first drive cylinder, second respectively
Cylinder of taking offence is connected, and described the first drive cylinder, the second drive cylinder drive the first clamper (1) and the second clamping respectively
Device (2) is relative to be moved backward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621236872.9U CN206300859U (en) | 2016-11-18 | 2016-11-18 | A kind of test system that material friction performance is tested and analyzed based on acoustic emission signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621236872.9U CN206300859U (en) | 2016-11-18 | 2016-11-18 | A kind of test system that material friction performance is tested and analyzed based on acoustic emission signal |
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| CN206300859U true CN206300859U (en) | 2017-07-04 |
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| CN201621236872.9U Expired - Fee Related CN206300859U (en) | 2016-11-18 | 2016-11-18 | A kind of test system that material friction performance is tested and analyzed based on acoustic emission signal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607624A (en) * | 2017-09-12 | 2018-01-19 | 北京工业大学 | It is adapted to the acoustic emission detection system and method for high frequency motion surface of friction pair |
| CN108896389A (en) * | 2018-07-17 | 2018-11-27 | 北华大学 | A kind of damages of concrete structures monitoring method based on piezoelectric intelligent aggregate |
| CN109668825A (en) * | 2017-10-17 | 2019-04-23 | 国家安全生产监督管理总局化学品登记中心 | The method for improving friction sensitivity test accuracy |
| CN111044618A (en) * | 2019-12-05 | 2020-04-21 | 西安理工大学 | Piezoelectric sensor for detecting acoustic emission signals and preparation method of piezoelectric film |
-
2016
- 2016-11-18 CN CN201621236872.9U patent/CN206300859U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607624A (en) * | 2017-09-12 | 2018-01-19 | 北京工业大学 | It is adapted to the acoustic emission detection system and method for high frequency motion surface of friction pair |
| WO2019051896A1 (en) * | 2017-09-12 | 2019-03-21 | 北京工业大学 | Acoustic emission testing device and method adapted to surface of friction pair moving at high frequency |
| US10859535B2 (en) * | 2017-09-12 | 2020-12-08 | Beijing University Of Technology | Detecting device and method for acoustic emission on high-frequency motion rubbing pair surface |
| CN107607624B (en) * | 2017-09-12 | 2021-03-02 | 北京工业大学 | Acoustic emission detection device and method adaptive to surface of high-frequency motion friction pair |
| CN109668825A (en) * | 2017-10-17 | 2019-04-23 | 国家安全生产监督管理总局化学品登记中心 | The method for improving friction sensitivity test accuracy |
| CN108896389A (en) * | 2018-07-17 | 2018-11-27 | 北华大学 | A kind of damages of concrete structures monitoring method based on piezoelectric intelligent aggregate |
| CN111044618A (en) * | 2019-12-05 | 2020-04-21 | 西安理工大学 | Piezoelectric sensor for detecting acoustic emission signals and preparation method of piezoelectric film |
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Granted publication date: 20170704 Termination date: 20171118 |