CN109507290A - The bundle fiber breaking point and electroacoustic measurement apparatus and method of micro- sound pick-up lattice arrangement - Google Patents
The bundle fiber breaking point and electroacoustic measurement apparatus and method of micro- sound pick-up lattice arrangement Download PDFInfo
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- CN109507290A CN109507290A CN201811568856.3A CN201811568856A CN109507290A CN 109507290 A CN109507290 A CN 109507290A CN 201811568856 A CN201811568856 A CN 201811568856A CN 109507290 A CN109507290 A CN 109507290A
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- G—PHYSICS
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- 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
- G01N29/04—Analysing solids
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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
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The present invention relates to the bundle fiber breaking points and electroacoustic measurement apparatus of a kind of micro- sound pick-up lattice arrangement, it is characterized in that, it include: to arrange parallel sound pick-up by m to arrange the sound pick-up array formed, m > 3, each column sound pick-up, which is arranged, to be arranged by n sound pick-up with file Linear Array Realtime, n > 3, sound pick-up array are arranged in bundle fiber and are fully covered by bundle fiber；After bundle fiber is stretched, pass through the acquisition module of sound pick-up array acquisition fibrous fracture acoustic signals strictly according to the facts；The fibrous fracture acoustic signals of acquisition module acquisition are carried out with the analysis system of data analysis and calculating.Application and method of another technical solution of the invention there is provided a kind of above-mentioned apparatus.Solves the current device and method for lacking fiber stress destruction situation when effective ways monitoring bundle fiber stretches it is an advantage of the present invention to provide a kind of.
Description
Technical field
The present invention relates to a kind of bundle fiber breaking point of micro- sound pick-up lattice arrangement and the device and methods of sound measurement, belong to
Textile fabric the field of test technology.
Background technique
In spinning technology, the ultimate strength and yarn quality Relationship Comparison of parallel bundle fiber are close, and it is stretched
Long and strength shows high correlation with the single fiber measured.Therefore deformation is carefully seen to the inside of bundle fiber, damage, was broken
The detection of journey becomes the urgent need of scientific research and engineering practice.
At present in elongation, the fracture characteristics for measuring fibrous material, carried out generally by the method for high-speed photography.
Using high-speed motion picture camera, the overall process for extending, being broken after fiber stress is filmed, then by projector, is observed instantaneous fine
The form of dimension, elongate fiber, fracture overall process, the tension failure performance for fibrous material of analyzing and researching.Though in this way
It is so relatively more intuitive, but due to mutually blocking between fibre single thread, when carrying out taking the photograph shape to bundle fiber, the portion of being blocked can not be taken
See crack conditions and the position for not measuring internal fiber the case where dividing.
Chinese Patent Application No. describes a kind of utilize for CN 88105476.3 and is tested fiber sound emission in loading process
Caused mechanical oscillation, are coupled on the piezoelectrics of acoustic emission sensor, generate resonant vibration, and then are electrodes sense, conversion
At electric signal, passes to Acoustic radiating instrument and amplify, examine wave, frequency-selecting processing, finally received by recorder, record fiber whole
Acoustic emission phenomenon during a inspection side.But this method can only be for ability spaced between single or single layer and fiber
Measurement.Measurement for bundle fiber, it is closely coupled between fiber and fiber to cause mechanical oscillation that generate using sound emission
Reciprocal influence and be unable to measure.The battle array in a kind of measurement of target noise that Chinese Patent Application No. is CN200710176151.2
The focus method of column noise signal, using multichannel delay and focusing alignment method carry out sound collection, but this method without
Method is applied to the collection and detection of the faint fracture of bundle fiber.
2007/0218806 Al of U.S. Patent number US describes the method for carbon fibre composite non-destructive testing, uses
Embedded sensors carry out mode and measure fibrous fracture sound measurement, this method can only have no signal by sensor, and to determine fiber, whether there is or not disconnected
Rhegma wound, and can not determine degree of injury.U.S. Patent number US 5104391, which is disclosed, is broken sound measurement for simple optical fiber
Device and method, but can not be applied to common bundle fiber fracture sound measurement.
Summary of the invention
The object of the present invention is to provide measurement methods and device that one kind can monitor and analyze bundle fiber stretch behavior, can obtain
Bundle fiber under static and dynamic condition is taken to stretch the stress damage for being, crack conditions.
In order to achieve the above object, the technical solution of the present invention is to provide a kind of bundle fibers of micro- sound pick-up lattice arrangement
Breaking point and electroacoustic measurement apparatus characterized by comprising
Parallel sound pick-up is arranged by m and arranges the sound pick-up array formed, m > 3, each column sound pick-up is arranged by n sound pick-up with file
Linear Array Realtime arranges, n > 3, and sound pick-up array is arranged in bundle fiber and is fully covered by bundle fiber；
After bundle fiber is stretched, pass through the acquisition module of sound pick-up array acquisition fibrous fracture acoustic signals strictly according to the facts；
The fibrous fracture acoustic signals of acquisition module acquisition are carried out with the analysis system of data analysis and calculating.
Preferably, the sound pick-up is by half parabolic hemispherical cover and the micro- Mike being placed in half parabolic hemispherical cover focus
Wind composition.
Preferably, the micro-microphone is having a size of long 3~4mm, wide 2~3mm, high 1~1.5mm, the micro-microphone
Sensitivity error is ± 1dB.
Preferably, the end face of the half parabolic hemispherical cover is regular circle, for effectively receiving parallel or perpendicular to fibre
Tie up the break signal of orientation.
There is provided a kind of bundle fiber fractures of above-mentioned micro- sound pick-up lattice arrangement for another technical solution of the invention
The application of point and electroacoustic measurement apparatus, which is characterized in that above-mentioned device is as a functional group on bundle strength tester
Part uses or above-mentioned device is used alone, for the average fracture strength of single fiber, the coefficient of variation and average elongation at break
And the measurement of the coefficient of variation.
There is provided the bundle fiber breaking points and sound of a kind of micro- sound pick-up lattice arrangement for another technical solution of the invention
The method of measuring device, which is characterized in that use above-mentioned device, comprising the following steps:
Bundle fiber to be tested is stretched, and during stretching, is broken by acquisition module by sound pick-up array acquisition fiber
Acoustic signals are split, after bundle fiber stretches, analysis system obtains the collected fibrous fracture acoustic signals of each sound pick-up
Waveform obtains inside stress, damage, the crack conditions of bundle fiber in drawing process by the analysis to wave character.
Preferably, when fiber is broken, there is apparent wave crest in the waveform of the fibrous fracture acoustic signals
And trough.
Measuring principle of the invention is when fibre bundle is stretched and is broken, and fracture sound transmission is to recently and most loudly
Can sound pick-up and be recorded, pulse sound is broken according to measured by sound pick-up, number of fiber in the region and each fracture can be obtained
The sound intensity of fiber, all n are a or m is a or m+n-1 sound pick-up is surveyed while the number of highest pulse value is to be broken fiber
Total radical, and the number of sound pick-up where highest pulse peak is the fracture fiber count in the region, then concludes fiber by peak value
Breaking degree.
Measuring device nuclear structure of the invention be Linear Array Realtime arrangement the hemispheric sound pick-up of parabolic and signal acquisition with
Data processing system.Its basic structure and principle are: sound pick-up is by parabolic hemispherical cover and the miniature Mike being placed in focus
Wind.There is certain thickness when bundle fiber is clamped on lint retainer, it can be by thickness side by parabolic hemispherical
The fracture voice and sentiment condition of upward fiber is collected rather than just single layer fibre.The fracture sound of fiber be it is faint, by being placed in coke
The fracture sound for being broken fiber is collected, is amplified by the miniature microphone on point.By the orthogonal Linear Array Realtime arrangement of this sound pick-up, overcome
Resolve propagation of the crepitation on bundle fiber on vertical and horizontal it is inconsistent caused by error.Pass through signal acquisition and data processing system
Uniting, it is determining to the region of fracture fiber and radical to realize to the analysis and comparison of signal wave.
It is an advantage of the present invention to provide one kind solve it is current lack when effective ways monitoring bundle fiber stretches fiber by
The device and method of power destruction situation.
Detailed description of the invention
Fig. 1 is that cross line configuration arranges bundle fiber fracture electroacoustic measurement apparatus figure；
Fig. 2 is micro- Mike's sound pick-up schematic diagram of half parabolic spherical shape；
Fig. 3 is the acquisition of fracture sound and analysis waveform figure, and abscissa is the time, and ordinate is the amplitude of signal；
In figure: 1-sound pick-up；2-mini microphones；3-half parabolic hemispherical cover；4-acquisition modules；5-analysis systems
System.
Specific embodiment
Present invention will be further explained below with reference to specific examples.Raw material and equipment in implementation grind for state key
Hair plan (2016YFC0802802) Funded Projects.It should be understood that these embodiments are merely to illustrate the present invention rather than limitation
The scope of the present invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art can be to this hair
Bright to make various changes or modifications, these equivalent forms also fall within the scope of the appended claims of the present application.
Embodiment 1: flaxen fiber beam
Flaxen fiber beam is clamped in the both ends of clamper, pickup made of being arranged as m × n sound pick-up 1 as shown in Figure 1
Device array is arranged in bundle fiber and is completely covered by bundle fiber.Acquisition module 4 on sound pick-up 1 and computer and divide
Analysis system 5 is connected.When bundle fiber is stretched, fiber is damaged, and passes through sound pick-up array acquisition strictly according to the facts by acquisition module 4
Fibrous fracture acoustic signals, analysis system 5 pass through the fibrous fracture acoustic signals received and form signal waveform, and in computer
Upper display signal waveform.When fiber is broken, there is apparent wave crest and trough in signal wave.To each sound pick-up
The shape of the signal wave of collection is extracted and analysis waveform feature, and wave character is using Cool Edit Pro2.0 software collection
With analysis voice signal, inside stress, damage, the crack conditions of bundle fiber in drawing process can be obtained.
Embodiment 2: carbon fiber bundle
Carbon fiber bundle is clamped in the both ends of clamper, pickup made of being arranged as m × n sound pick-up 1 as shown in Figure 1
Device array is arranged in bundle fiber and is completely covered by bundle fiber.Acquisition module 4 on sound pick-up 1 and computer and divide
Analysis system 5 is connected.When bundle fiber is stretched, fiber is damaged, and passes through sound pick-up array acquisition strictly according to the facts by acquisition module 4
Fibrous fracture acoustic signals, analysis system 5 pass through the fibrous fracture acoustic signals received and form signal waveform, and in computer
Upper display signal waveform.When fiber is broken, there is apparent wave crest and trough in signal wave.To each sound pick-up
The shape of the signal wave of collection is extracted and analysis waveform feature, and wave character is using Cool Edit Pro2.0 software collection
With analysis voice signal, inside stress, damage, the crack conditions of bundle fiber in drawing process can be obtained.
Embodiment 3: wool fiber beam
Wool fiber beam is clamped in the both ends of clamper, is picked up made of being arranged as m × n sound pick-up 1 as shown in Figure 1
Sound device array is arranged in bundle fiber and is completely covered by bundle fiber.Acquisition module 4 on sound pick-up 1 and computer and
Analysis system 5 is connected.When bundle fiber is stretched, fiber is damaged, and is adopted strictly according to the facts by sound pick-up array by acquisition module 4
Collect fibrous fracture acoustic signals, analysis system 5 passes through the fibrous fracture acoustic signals received and forms signal waveform, and is calculating
The signal waveform is shown on machine, as shown in Figure 3.When fiber is broken, there is apparent wave crest and trough in signal wave.
Simultaneously analysis waveform feature is extracted to the shape for the signal wave that each sound pick-up is collected, wave character is using Cool Edit
Pro2.0 software collection and analysis voice signal, can be obtained inside stress, damage, the crack conditions of bundle fiber in drawing process.
Claims (7)
1. a kind of the bundle fiber breaking point and electroacoustic measurement apparatus of micro- sound pick-up lattice arrangement characterized by comprising
Parallel sound pick-up is arranged by m and arranges the sound pick-up array formed, m > 3, each column sound pick-up is arranged by n sound pick-up (1) with file
Linear Array Realtime arranges, n > 3, and sound pick-up array is arranged in bundle fiber and is fully covered by bundle fiber；
After bundle fiber is stretched, pass through the acquisition module (4) of sound pick-up array acquisition fibrous fracture acoustic signals strictly according to the facts；
The fibrous fracture acoustic signals of acquisition module (4) acquisition are carried out with the analysis system (5) of data analysis and calculating.
2. the bundle fiber breaking point and electroacoustic measurement apparatus of a kind of micro- sound pick-up lattice arrangement according to claim 1, special
Sign is that the sound pick-up (1) is by half parabolic hemispherical cover (3) and the micro- wheat being placed in half parabolic hemispherical cover (3) focus
Gram wind (2) composition.
3. the bundle fiber breaking point and electroacoustic measurement apparatus of a kind of micro- sound pick-up lattice arrangement according to claim 2, special
Sign is that the micro-microphone (2) is having a size of long 3~4mm, wide 2~3mm, high 1~1.5mm, the spirit of the micro-microphone (2)
Sensitivity error is ± 1dB.
4. the bundle fiber breaking point and electroacoustic measurement apparatus of a kind of micro- sound pick-up lattice arrangement according to claim 2, special
Sign is that the end face of the half parabolic hemispherical cover (3) is regular circle, for effectively receiving parallel or perpendicular to fiber alignment
The break signal in direction.
5. a kind of application of the bundle fiber breaking point and electroacoustic measurement apparatus of micro- sound pick-up lattice arrangement as described in claim 1,
It is characterized in that, device as described in claim 1 uses or such as a functional unit on bundle strength tester
Device described in claim 1 is used alone, for the average fracture strength of single fiber, the coefficient of variation and average elongation at break
And the measurement of the coefficient of variation.
6. a kind of method of the bundle fiber breaking point and electroacoustic measurement apparatus of micro- sound pick-up lattice arrangement, which is characterized in that using such as
Device described in claim 1, comprising the following steps:
Bundle fiber to be tested is stretched, and during stretching, passes through sound pick-up array acquisition fibrous fracture by acquisition module (4)
Acoustic signals, after bundle fiber stretches, analysis system (5) obtains the collected fibrous fracture sound wave letter of each sound pick-up (1)
Number waveform, inside stress, damage, the crack conditions of bundle fiber in drawing process are obtained by the analysis to wave character.
7. the method for the bundle fiber breaking point and electroacoustic measurement apparatus of a kind of micro- sound pick-up lattice arrangement as claimed in claim 6,
It is characterized in that, there is apparent wave crest and wave in the waveform of the fibrous fracture acoustic signals when fiber is broken
Paddy.
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| CN201811568856.3A CN109507290B (en) | 2018-12-21 | 2018-12-21 | Beam fiber breaking point and acoustic measurement device and method for micro sound pick-up dot matrix arrangement |
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| CN201811568856.3A CN109507290B (en) | 2018-12-21 | 2018-12-21 | Beam fiber breaking point and acoustic measurement device and method for micro sound pick-up dot matrix arrangement |
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