CN2765186Y - Non-destructive test device for shear modulus of wood and xyloid composite materials - Google Patents
Non-destructive test device for shear modulus of wood and xyloid composite materials Download PDFInfo
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- CN2765186Y CN2765186Y CN 200520020050 CN200520020050U CN2765186Y CN 2765186 Y CN2765186 Y CN 2765186Y CN 200520020050 CN200520020050 CN 200520020050 CN 200520020050 U CN200520020050 U CN 200520020050U CN 2765186 Y CN2765186 Y CN 2765186Y
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- sensor
- fourier transform
- signal amplifier
- fast fourier
- compression spring
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Abstract
The utility model 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 utility model 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 sensor (1) and (10), signal amplifier (9) and (6) and fast Fourier transform (FFT) 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 (FFT) analyser (7) and right sensor (10), right-side signal amplifier (6), the fast Fourier transform (FFT) analyser (7) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520020050 CN2765186Y (en) | 2005-01-11 | 2005-01-11 | Non-destructive test device for shear modulus of wood and xyloid composite materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520020050 CN2765186Y (en) | 2005-01-11 | 2005-01-11 | Non-destructive test device for shear modulus of wood and xyloid composite materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2765186Y true CN2765186Y (en) | 2006-03-15 |
Family
ID=36168103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520020050 Expired - Lifetime CN2765186Y (en) | 2005-01-11 | 2005-01-11 | Non-destructive test device for shear modulus of wood and xyloid composite materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2765186Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338462C (en) * | 2005-01-11 | 2007-09-19 | 胡英成 | Woods and wooden composite material shearing modulus non destructive checkers |
-
2005
- 2005-01-11 CN CN 200520020050 patent/CN2765186Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100338462C (en) * | 2005-01-11 | 2007-09-19 | 胡英成 | Woods and wooden composite material shearing modulus non destructive checkers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20050111 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |