CN100338462C - Woods and wooden composite material shearing modulus non destructive checkers - Google Patents
Woods and wooden composite material shearing modulus non destructive checkers Download PDFInfo
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- CN100338462C CN100338462C CNB2005100096128A CN200510009612A CN100338462C CN 100338462 C CN100338462 C CN 100338462C CN B2005100096128 A CNB2005100096128 A CN B2005100096128A CN 200510009612 A CN200510009612 A CN 200510009612A CN 100338462 C CN100338462 C CN 100338462C
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- sensor
- signal amplifier
- fourier transform
- fast fourier
- compression spring
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Abstract
The present invention relates to a non-destructive detection device for the shear modulus of wood and wood composite materials, which belongs to a detection device of material properties. A compression spring is arranged on a frame, wherein a plastic board is assembled on the frame through the compression spring, the left and the right sides of the end surface of the plastic board are respectively provided with a left and a right side sensors. Foam supporting blocks are assembled below the left and the right side sensors, and the left side sensor, a left side signal amplifier, a fast Fourier transform analyzer, the right side sensor, a right side signal amplifier and another fast Fourier transform analyzer are respectively communicated by conducting wires. The present invention realizes the non-destructive detection of the shear modulus, does not damage detection components and instruments, and has the characteristics of simple structure, convenient and fast operation, high detection efficiency, good quality and low cost.
Description
Technical field
The invention belongs to the material property checkout equipment, is mainly used in timber and composite wooden material modulus of shearing and measures.
Background technology
In order to use timber and composite wooden material with holding water, just must detect material capability, its modulus of shearing promptly is to detect one of index.When detecting, it is a key issue that sensor is fully contacted with the detection test specimen.At present instant glue sticks that adopt stick together sensor more with detecting test specimen, but have done a lot of drawbacks like this: the one, to sensor and test specimen be separated with pocket knife or other instruments after having surveyed a test specimen, and time-consuming, require great effort; The 2nd, in sensor and test specimen separation process, be easy to sensor and tested object are damaged, and the sensor more expensive precise part that is price causes waste; Because of often causing tested timber and composite wooden material test specimen to damage after detecting,, can only inspect by random samples simultaneously, be difficult for guaranteeing properties of product and quality so can not realize that material all detects.
Summary of the invention
The purpose of the invention is exactly problem and the defective that exists at above-mentioned prior art, need in conjunction with producing to use, design provides a kind of timber and composite wooden material shear-modulus nondestructive testing device, reaches to guarantee that test product and checkout equipment do not damage, improve detection efficiency, reduce the purpose that detects cost, reduces labor intensity after finishing testing.
The basic design of the invention is, on the inboard upper wall surface of framework compression spring is installed, and plastic plate is connected with compression spring, plastic plate is disposed be installed in framework inside; Equipped respectively left side sensor and right sensor on plastic plate and arranged on left and right sides position; The foam support piece is fitted in left and right side sensor below; Lead with connecting between left side sensor, left-side signal amplifier, the fast Fourier transform (FFT) analyser and between the right sensor, right-side signal amplifier, fast Fourier transform (FFT) analyser, so far constitutes timber and composite wooden material shear-modulus nondestructive testing device respectively.
Do not destroy after the invention detects and detect test specimen and checkout equipment, the non-destructive that has realized timber and composite wooden material modulus of shearing 100% detects, have simple in structure, convenient to operation, detection efficiency is high, detections is effective, detect that cost is low, the characteristics of assurance product quality.
Description of drawings
Accompanying drawing is timber and composite wooden material shear-modulus nondestructive testing device structural representation.
Piece number explanation among the figure:
1, left side sensor, 2, compression spring, 3, plastic plate, 4, framework, 5, foam support piece, 6, right-side signal amplifier, 7, fast Fourier transform (FFT) analyser, 8, detection test specimen, 9, left-side signal amplifier, 10, right sensor.
Embodiment
Below in conjunction with accompanying drawing the invention optimum implementation is described in detail.Timber and composite wooden material shear-modulus nondestructive testing device comprise sensor 1 and 10, signal amplifier 9 and 6 and fast Fourier transform (FFT) analyser 7, compression spring 2 is installed on framework 4 inboard upper wall surfaces, plastic plate 3 upper surfaces are connected with compression spring 2 lower surfaces, and plastic plate 3 is installed in framework 4 inside; Left side sensor 1 and right sensor 10 are installed in configuration respectively on and arranged on left and right sides position, plastic plate 3 lower surface; Foam support piece 5 is fitted in left and right side sensor 1,10 belows; Lead will be connected between left side sensor 1, left-side signal amplifier 9, fast fourier transform fft analysis instrument 7 and right sensor 10, right-side signal amplifier 6, the fast Fourier transform (FFT) analyser 7 respectively.
When test specimen is carried out the modulus of shearing detection, to detect test specimen 8 is positioned between left and right side sensor 1,10 and the foam support piece 5, under compression spring 2 effects, fully closely contact above making left and right side sensor 1,10 and detect test specimen 8 two ends by plastic plate 3, node is by 5 supports of foam support piece below detection test specimen 8 two ends; Knock detection test specimen 8 one ends with batten, detect the other end catch surface ripple of test specimen 8, trigger pip and received signal pass to fast Fourier transform (FFT) analyser 7 through the sensor 1,10 of and arranged on left and right sides and the signal amplifier 9,6 of and arranged on left and right sides respectively, resolve the mistiming, utilize following formula V=L/T, GV=ρ V
2Calculate the modulus of shearing that detects test specimen 8.In the formula, V is a surface wave propagation speed, and L detects test specimen length, and T is the travel-time, and GV is a modulus of shearing, and ρ is a test specimen density.
Claims (1)
1, a kind of timber and composite wooden material shear-modulus nondestructive testing device, comprise left side sensor (1), right sensor (10), left-side signal amplifier (9) and right-side signal amplifier (6) and fast fourier transform analyser (7), it is characterized in that on the inboard upper wall surface of framework (4), compression spring (2) being installed, plastic plate (3) upper surface is connected with compression spring (2) lower surface, and plastic plate (3) is installed in framework (4) inside; Left side sensor (1) and right sensor (10) are installed in configuration respectively on and arranged on left and right sides position, plastic plate (3) lower surface; Foam support piece (5) is fitted in left and right side sensor (1), (10) below; Lead will be connected between left side sensor (1), left-side signal amplifier (9), fast fourier transform analyser (7) and right sensor (10), right-side signal amplifier (6), the fast fourier transform analyser (7) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100096128A CN100338462C (en) | 2005-01-11 | 2005-01-11 | Woods and wooden composite material shearing modulus non destructive checkers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100096128A CN100338462C (en) | 2005-01-11 | 2005-01-11 | Woods and wooden composite material shearing modulus non destructive checkers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1645130A CN1645130A (en) | 2005-07-27 |
| CN100338462C true CN100338462C (en) | 2007-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100096128A Expired - Fee Related CN100338462C (en) | 2005-01-11 | 2005-01-11 | Woods and wooden composite material shearing modulus non destructive checkers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100338462C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603820B (en) * | 2009-07-23 | 2010-12-01 | 中国林业科学研究院木材工业研究所 | Real-time detection system for wood microstructure characteristic changes |
| CN105891012B (en) * | 2016-03-30 | 2018-10-19 | 西华大学 | A kind of portable composite plate boxshear apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1011547B (en) * | 1988-06-18 | 1991-02-06 | 核工业部第一研究设计院第四研究所 | Apparatus for measuring mechanical performance of solid materials |
| CN2147534Y (en) * | 1992-09-24 | 1993-11-24 | 机械电子工业部郑州磨料磨具磨削研究所 | Multi-function modulus of elasticity tester |
| US6782732B2 (en) * | 2003-01-29 | 2004-08-31 | Taiwan Forestry Research Institute | Method for non-destructive stress wave testing of wood |
| CN2765186Y (en) * | 2005-01-11 | 2006-03-15 | 胡英成 | Non-destructive test device for shear modulus of wood and xyloid composite materials |
-
2005
- 2005-01-11 CN CNB2005100096128A patent/CN100338462C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1011547B (en) * | 1988-06-18 | 1991-02-06 | 核工业部第一研究设计院第四研究所 | Apparatus for measuring mechanical performance of solid materials |
| CN2147534Y (en) * | 1992-09-24 | 1993-11-24 | 机械电子工业部郑州磨料磨具磨削研究所 | Multi-function modulus of elasticity tester |
| US6782732B2 (en) * | 2003-01-29 | 2004-08-31 | Taiwan Forestry Research Institute | Method for non-destructive stress wave testing of wood |
| CN2765186Y (en) * | 2005-01-11 | 2006-03-15 | 胡英成 | Non-destructive test device for shear modulus of wood and xyloid composite materials |
Non-Patent Citations (3)
| Title |
|---|
| "刨花板动态剪切弹性模量的无损检测" 胡英成等，东北林业大学学报，第29卷第2期 2001 * |
| "利用振动法检测胶合板的剪切弹性模量" 胡英成等，木材工业，第15卷第4期 2001 * |
| "木材及人造板物理力学性能无损检测技术研究的发展与展望" 胡英成等，世界林业研究，第15卷第4期 2002 * |
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|---|---|
| CN1645130A (en) | 2005-07-27 |
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