CN109001300A - A kind of sound arrester being suitable for impact echo audio frequency detection - Google Patents
A kind of sound arrester being suitable for impact echo audio frequency detection Download PDFInfo
- Publication number
- CN109001300A CN109001300A CN201810608862.0A CN201810608862A CN109001300A CN 109001300 A CN109001300 A CN 109001300A CN 201810608862 A CN201810608862 A CN 201810608862A CN 109001300 A CN109001300 A CN 109001300A
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- sound
- sound insulation
- insulation cylinder
- bracket
- audio frequency
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Classifications
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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
- G01N29/04—Analysing solids
- G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
-
- 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
Abstract
The invention discloses a kind of sound arresters for being suitable for impact echo audio frequency detection, including round table-like sound insulation cylinder, the lid being separately positioned in sound insulation cylinder both ends and bracket, the connection cables being connected between lid and bracket, the lid and bracket are located at sound insulation cylinder at round table-like and lid and are relatively large in diameter end；Sound insulation by filling material in the round table-like sound insulation cylinder.Its pickup accuracy is high.
Description
Technical field
The present invention relates to building, building, bridge, Quality of Water Conservancy Projects safety detection technology fields, and in particular to Yi Zhongshi
Together in the sound arrester of impact echo audio frequency detection.
Background technique
For the non-destructive testing technology of concrete structure, following two major classes can be mainly divided into according to its test media:
1), the detection method based on impact elasticity wave, ultrasonic wave
Supercritical ultrasonics technology with impact elasticity wave be substantially as (broadly belonging to the scope of elastic wave), be all in quilt
Survey in object and propagated by the small movements of particle, thus with the relating to parameters such as the mechanical characteristic of material.But two methods
Due to wavelength, test equipment difference and have biggish difference.
2), based on the detection method of electromagnetic wave
Electromagnetic wave is to be propagated in measured body by the mutual conversion of electric and magnetic fields, and wherein the particle of object is not
Movement can be generated.This method is represented as Ground Penetrating Radar, by luring the discontinuity of electrical property (dielectric constant) in detection material,
The internal state of structure is inferred using reflection of the electromagnetic wave of transmitting on different medium face.Due to the letter of Ground Penetrating Radar excitation
The consistency of number (electromagnetic wave) is good, and can receive signal on the move, therefore in concrete NDT, (especially tunnel serves as a contrast this method
Build detection) in be also widely used.
Following table compares the different lossless detection methods for concrete structure, it can be seen that existing main stream approach is not
It is suitble to non-contact, mobile detection.
The comparison of the different Nondestructive Methods for Testing Concrete of table one
| Method | To/defect sensitivity of coming to nothing | Non-contact detection | Movable type detection |
| Ultrasonic wave | ○ | × | × |
| Impact elasticity wave | ◎ | × | × |
| Electromagnetic wave | △ | △ | ○ |
◎: very good；Zero: good；△: poor；×: it can not
Currently, being to be primarily upon survey to beat based on sound method for the more of tunnel lining concrete defects detection
The variation of frequency characteristic, attenuation characteristic, the amplitude response of trial signal etc..Its principle is when hammering concrete structural surface,
In surface meeting induced vibration, which can also compress/stretch air and form sound wave.Therefore, the acoustic characteristic and induction of the sound wave
Vibration characteristics just have close relationship.In general, at the position that generation is come to nothing, vibration characteristics can change.Although should
Method has a long history, but its have the drawback that need biggish hammer vibration energy and hammer body, be difficult to quantitative and precision compared with
Difference is difficult to detect depths and comes to nothing and defect.
For this purpose, the advantages of we combine elastic wave Impact echo and beat sound method, develops non-contact, shifting based on audio frequency
Engineering lossless detection method " impact audio frequency echo method, Impact Acoustic the Echo method, IAE " of dynamic formula.This method
To the test position exciting and induced vibration and the sound of test structure, which is picked up by wide frequency domain, the high sound pick up equipment that is directed toward
Sound signal, and pass through the acceleration of difference processing calculating air column.Since the acceleration and the acceleration on measured structure surface have
Close correlativity, therefore analyze the acceleration signal i.e. and can reach quick, the accurate mesh for understanding test inside configuration situation
, the error that formula test generates is avoided contact with, improves measuring accuracy and efficiency, and can be used for mobile test.Using this method, need
Sound pick up equipment is wanted to realize the pickup of voice signal, how sound pick up equipment reduces external disturbance during pickoff signals to improve
The testing efficiency and precision of this method are considerable things.
Summary of the invention
In order to solve the above-mentioned technical problem the present invention provides a kind of sound arrester for being suitable for impact echo audio frequency detection.
The present invention is achieved through the following technical solutions:
A kind of sound arrester being suitable for impact echo audio frequency detection, including round table-like sound insulation cylinder, it is separately positioned on sound insulation
Lid in cylinder both ends and bracket for fixing sound pick-up, the connection cables being connected between lid and bracket, the lid
It is located at sound insulation cylinder at round table-like and lid with bracket and is relatively large in diameter end；Sound insulation by filling material in the round table-like sound insulation cylinder.This
Scheme provide it is a kind of for fixing the sound arrester of sound pick-up, in use, sound pick-up connect with connection cables and is fixed on bracket
On, sound insulation cylinder small end contacts after increasing sound insulating pad with measured surface, and sound pick-up picks up tested body surface by non-contacting method
The vibration signal in face, and analyzed for Impact echo.It is dry effectively to completely cut off outside air vibration using sound insulation cylinder and acoustic material
It disturbs, avoids the generation that exterior space noise causes the output signal of sound pick-up itself, reduce the influence to sound pick-up.So-called circle
The part of after the plane that mesa-shaped, i.e. taper are parallel to bottom surface is cut and bottom surface formation.Sound insulation cylinder avoids sound wave from existing at round table-like
It is reflected inside sound insulation cylinder, improves measuring accuracy.Bracket and lid reduce the influence of reflective surface area, improve at round table-like
Measuring accuracy.Using the structure of the present apparatus, between sound pick-up and bracket, between bracket and sound insulation cylinder, sound insulation cylinder and tested surface it
Between constitute multiple isolation mountings with isolating vibration, effectively improve signal-to-noise ratio.
Preferably, being also equipped with sound insulation on the sound insulation drum outer wall to further decrease outside air vibration interference
Material.Simultaneously in sound insulation drum outer wall and internal setting acoustic material, exterior space noise is avoided to cause the output of sound pick-up itself
The generation of signal reduces the influence to sound pick-up.
Preferably, the bracket is fixed on sound insulation cylinder by supporting element.Using supporting piece structure, reduce reflective surface area
Influence, improve measuring accuracy, while supporting element can keep support stiffness.
Preferably, the sound insulation cylinder is arranged concentrically with bracket.Sound insulation cylinder is concentric with bracket, keeps connection cables and its axis same
Axis improves the accuracy of pickup.
Preferably, the acoustic material is sound-proof material.It is not only light, easy to manufacture using sound-proof material as acoustic material
Molding, and it is cheap.
Preferably, on the bracket and sound insulation cylinder is smaller in order to further decrease the vibration interference collided between component
End is provided with sound insulating pad.
Compared with prior art, the present invention having the following advantages and benefits:
1, sound insulation cylinder of the invention and acoustic material effectively completely cut off outside air vibration interference, avoid exterior space noise
Cause the generation of the output signal of sound pick-up itself, reduces the influence to sound pick-up.
2, the sound insulation cylinder, bracket, lid of the present apparatus avoid sound wave from reflecting inside sound insulation cylinder, mention at round table-like
High measuring accuracy.
3, it is constituted between the sound pick-up and bracket of the present apparatus, between bracket and sound insulation cylinder, between sound insulation cylinder and tested surface more
A isolation mounting effectively improves signal-to-noise ratio with isolating vibration.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 for no sleeve 20cm, 40cm concrete grouting Packing models test data Spectrum Analysis Comparison figure.Wherein from
Down toward going forward 10 as 20cm thickness concrete model test data, latter 10 are 40cm thickness concrete model test data.
Fig. 3 for no sleeve 20cm, 40cm concrete grouting Packing models test data Contour map.
Fig. 4 is the test data frequency spectrum using sound arrester of the invention to 20cm, 40cm concrete grouting Packing models
Analyze comparison diagram.Wherein from the bottom up first 10 be 20cm thickness concrete model test data, latter 10 be 40cm thickness concrete
Model measurement data.
Fig. 5 is equivalent using the test data of sound arrester of the invention to 20cm, 40cm concrete grouting Packing models
Line graph.
Fig. 6 is no sleeve 20cm thickness concrete grouting model duct and closely knit test data Spectrum Analysis Comparison figure.Its
In from the bottom up first 10 be duct test data, latter 10 be closely knit test data.
Fig. 7 is no sleeve 20cm thickness concrete grouting model duct (defect) and closely knit test data Contour map.
Fig. 8 is using sound arrester of the invention to 20cm thickness concrete grouting model duct and closely knit test data frequency
Spectrum analysis comparison diagram, wherein from the bottom up first 10 be duct test data, latter 10 be closely knit test data.
Fig. 9 is using sound arrester of the invention to 20cm thickness concrete grouting model duct and closely knit test data etc.
It is worth line graph.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
A kind of sound arrester being suitable for impact echo audio frequency detection as shown in Figure 1, including round table-like sound insulation cylinder 3, point
The lid 1 not being arranged in 3 both ends of sound insulation cylinder and the bracket 7 for fixing sound pick-up are connected between lid 1 and bracket 7
Connection cables 2, lid 1 and bracket 7 are located at sound insulation cylinder 3 at round table-like and lid 1 and are relatively large in diameter end；In round table-like sound insulation cylinder 3
Sound insulation by filling material 4.
Acoustic material can also just be made there are many material, for example more sound-proof material on the market.
Embodiment 2
Principle based on the above embodiment, the present embodiment disclose an optimal enforcement mode.
Equally using the above structure, while on 3 outer wall of sound insulation cylinder acoustic material 4 is set, and pass through supporting element 6 for bracket
7 are fixed on sound insulation cylinder 3.Supporting element is using flake.
In use, being fixed on bracket after sound pick-up is connected with connection cables by sound insulating pad, edge and branch on sound pick-up
Along maintaining an equal level on frame, bracket is packed among sound insulation cylinder to be connected by supporting element, sound insulating pad, keeps concentric flat between bracket and sound insulation cylinder
Row, sound insulation cylinder inside sound insulation by filling cotton, outside package sound-proof material；After cable and lid are welded together, by the lid
One is fixed by bolts in sound insulation cylinder.Corresponding test equipment and cable are connected, device is pressed on into measured object surface with hand,
Sound insulation cylinder small end sound insulating pad is kept to contact with measured body, without applying too big external force；It is hammered into shape using exciting in sound insulation cylinder
Side taps, and generates vibration, eats.
After installing device using the above method, after testing and debugging, respectively to the dense grouting mould of 20cm, 40cm thickness
Type is tested.Scene is all made of D17 exciting hammer.
Fig. 2,3 for no sleeve 20cm, 40cm thickness concrete grouting Packing models test signal, wherein from the bottom up preceding 10
A is 20cm thickness concrete model test data, and latter 10 are 40cm thickness concrete model test data, by MEM frequency spectrum point
After analysis, the grouting modeling that can not will become apparent from 20cm thickness and 40cm thickness is distinguished.
Fig. 4,5 are test signal of the use sound arrester of the invention to 20cm, 40cm concrete grouting Packing models,
In from the bottom up first 10 be 20cm thickness concrete model test data, latter 10 be 40cm thickness concrete model, pass through MEM
After spectrum analysis, it can be clearly seen that the grouting of 20cm thickness and 40cmm thickness is distinguished.
After installing device using the above method, after testing and debugging, the grouting modeling duct of 20cm thickness (is lacked respectively
Fall into) it is tested with closely knit section.Scene is all made of D17 exciting hammer.
Fig. 6,7 are no sleeve to the thickness concrete grouting model duct 20cm (defect) and closely knit contrast test signal,
In from the bottom up first 10 be duct (defect) test data, latter 10 be closely knit test data.By MEM spectrum analysis with
Afterwards, concrete model duct (defect) and closely knit difference can not be will become apparent from.
Fig. 8,9 are to be believed using the present invention the thickness concrete grouting model duct 20cm (defect) and closely knit contrast test
Number, wherein from the bottom up first 10 be duct (defect) test data, latter 10 be closely knit test data.Passing through MEM frequency spectrum
After analysis, it can be clearly seen that concrete model duct (defect) and closely knit difference.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of sound arrester for being suitable for impact echo audio frequency detection, which is characterized in that including round table-like sound insulation cylinder (3), divide
Not She Zhi in the lid (1) in sound insulation cylinder (3) both ends and the bracket (7) for fixing sound pick-up, be connected to lid (1) and bracket
(7) connection cables (2) between, the lid (1) and bracket (7) are located at sound insulation cylinder (3) diameter at round table-like and lid (1)
Compared with big end；The interior sound insulation by filling material (4) of round table-like sound insulation cylinder (3).
2. a kind of sound arrester for being suitable for impact echo audio frequency detection according to claim 1, which is characterized in that described
Acoustic material (4) are also equipped on sound insulation cylinder (3) outer wall.
3. a kind of sound arrester for being suitable for impact echo audio frequency detection according to claim 1, which is characterized in that described
Bracket (7) is fixed on sound insulation cylinder (3) by supporting element (6).
4. a kind of sound arrester for being suitable for impact echo audio frequency detection according to claim 1, which is characterized in that described
Sound insulation cylinder (3) is arranged concentrically with bracket (7).
5. a kind of sound arrester for being suitable for impact echo audio frequency detection according to claim 1, which is characterized in that described
Acoustic material (4) is sound-proof material.
6. a kind of sound arrester for being suitable for impact echo audio frequency detection according to claim 1, which is characterized in that described
On bracket (7) and sound insulation cylinder small end is provided with sound insulating pad (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810608862.0A CN109001300B (en) | 2018-06-13 | 2018-06-13 | Sound insulation device suitable for impact echo acoustic frequency detection |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810608862.0A CN109001300B (en) | 2018-06-13 | 2018-06-13 | Sound insulation device suitable for impact echo acoustic frequency detection |
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| Publication Number | Publication Date |
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| CN109001300A true CN109001300A (en) | 2018-12-14 |
| CN109001300B CN109001300B (en) | 2021-12-21 |
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| CN201810608862.0A Active CN109001300B (en) | 2018-06-13 | 2018-06-13 | Sound insulation device suitable for impact echo acoustic frequency detection |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487315A (en) * | 2020-04-17 | 2020-08-04 | 四川陆通检测科技有限公司 | Audio frequency nondestructive testing method for tunnel lining thickness and void |
| CN112229915A (en) * | 2020-12-11 | 2021-01-15 | 四川升拓检测技术股份有限公司 | Device and method for measuring grouting compactness of prestressed duct |
| CN114624336A (en) * | 2022-05-16 | 2022-06-14 | 四川升拓检测技术股份有限公司 | Signal detection device and method based on wheel type sound insulation impact echo acoustic frequency method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111487315A (en) * | 2020-04-17 | 2020-08-04 | 四川陆通检测科技有限公司 | Audio frequency nondestructive testing method for tunnel lining thickness and void |
| CN112229915A (en) * | 2020-12-11 | 2021-01-15 | 四川升拓检测技术股份有限公司 | Device and method for measuring grouting compactness of prestressed duct |
| CN114624336A (en) * | 2022-05-16 | 2022-06-14 | 四川升拓检测技术股份有限公司 | Signal detection device and method based on wheel type sound insulation impact echo acoustic frequency method |
| CN114624336B (en) * | 2022-05-16 | 2022-09-02 | 四川升拓检测技术股份有限公司 | Signal detection device and method based on wheel type sound insulation impact echo acoustic frequency method |
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| Publication number | Publication date |
|---|---|
| CN109001300B (en) | 2021-12-21 |
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