CN1645129A - Woods and wooden composite material elastic modulus non-destructive checkers - Google Patents
Woods and wooden composite material elastic modulus non-destructive checkers Download PDFInfo
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- CN1645129A CN1645129A CN 200510009611 CN200510009611A CN1645129A CN 1645129 A CN1645129 A CN 1645129A CN 200510009611 CN200510009611 CN 200510009611 CN 200510009611 A CN200510009611 A CN 200510009611A CN 1645129 A CN1645129 A CN 1645129A
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- sensor
- elastic modulus
- plastic plate
- framework
- fourier transform
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Abstract
A device for testing modulus of elasticity for wood and wood composite material nondestructively is featured as setting left transducer on one sidewall of frame and right transducer on plastic plate connected to another sidewall of frame; and connecting left transducer left amplifier fast and Fourier transform analyzer separately with right transducer, right amplifier and fast Fourier transform analyzer by wire.
Description
Technical field
The invention relates to a kind of material property detecting instrument equipment, is mainly used in timber and composite wooden material elastic modulus detection.
Background technology
In order to use timber and composite wooden material with holding water, just must detect material capability, its elastic modulus promptly is to detect one of index.During detection, 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 elastic modulus the cannot-harm-detection device, by need not to destroy detected object and detecting instrument is preceding topic, it is checked effectively and tests, reach and improve detection efficiency, reduce labor intensity, guarantee that test product and testing tool are not destroyed, reduce the purpose that detects cost.
The basic design of the invention is, set gradually left side sensor, right sensor, plastic plate and compression spring in framework inside, its left side sensor is installed on framework one sidewall, right sensor is installed on the plastic plate, the two ends of compression spring are connected with plastic plate and another sidewall of framework respectively, and plastic plate is installed on the framework; Lead is connected left side sensor, left side amplifier, fast Fourier transform (FFT) analyser and right sensor, right side amplifier, fast Fourier transform (FFT) analyser respectively, so far constitutes timber and composite wooden material elastic modulus the cannot-harm-detection device.
The invention has realized that the non-destructive of timber and composite wooden material elastic modulus 100% detects, neither destroy detected test specimen, also breakage detection device not, have simple in structure, detecting operation is convenient and swift, detection efficiency is high, detect quality good, reduce the characteristics that detect cost.
Description of drawings
Accompanying drawing is timber and composite wooden material elastic modulus the cannot-harm-detection device structural representation.
Piece number explanation among the figure:
1, fast Fourier transform (FFT) analyser, 2, right side amplifier, 3, right sensor, 4, plastic plate, 5, compression spring, 6, framework, 7, detection test specimen, 8, left side sensor, 9, left side amplifier.
Embodiment
Below in conjunction with accompanying drawing the invention optimum implementation is described in detail.Timber and composite wooden material elastic modulus the cannot-harm-detection device comprise fast Fourier transform (FFT) analyser 1, amplifier 2 and 9 and sensor 3 and 8, set gradually left side sensor 8, right sensor 3, plastic plate 4 and compression spring 5 from left to right in framework 6 inside, its left side sensor 8 is installed on framework 6 one sidewalls, right sensor 3 is installed on the plastic plate 4, the two ends of compression spring 5 are connected with plastic plate 4 and framework 6 another sidewalls respectively, and plastic plate 4 is installed on the framework 6; Lead is connected left side sensor 8, left side amplifier 9, fast Fourier transform (FFT) analyser 1 and right sensor 3, right side amplifier 2, fast Fourier transform (FFT) analyser 1 respectively.
When test specimen is carried out the elastic modulus detection, timber test specimen or composite wooden material detection test specimen 7 are positioned between the left and right side sensor 8,3, under compression spring 5 effects, by plastic plate 4 test specimen 7 is clamped in the framework 6, the test specimen two ends are fully closely contacted with left and right side sensor 8,3 respectively; The impulsive force that when an end of test specimen utilizes the propelling pencil core to fracture, produces, transmit as an end sensor, the sensor received signal of the test specimen other end, transmit and received signal is transferred to fast Fourier transform (FFT) analyser 1 after amplifying by amplifier 9,2, record the mistiming of trigger pip and received signal, utilize conventional formula to calculate transaudient speed and elastic modulus, that is: V=L/T, E=ρ V
2, V is a longitudinal wave propagation speed in the formula, and L is a test specimen length, and T is the travel-time, and E is an elastic modulus, ρ is a test specimen density.Compression spring 5 firmly, mobile plastic plate 4 promptly takes off test specimen 7 easily in framework 6.
Claims (1)
1, a kind of timber and composite wooden material elastic modulus the cannot-harm-detection device, comprise fast Fourier transform (FFT) analyser (1), amplifier (2) and (9) and sensor (3) and (8), it is characterized in that setting gradually from left to right left side sensor (8) in framework (6) inside, right sensor (3), plastic plate (4) and compression spring (5), its left side sensor (8) is installed on framework (6) one sidewalls, right sensor (3) is installed on the plastic plate (4), the two ends of compression spring (5) are connected with plastic plate (4) and another sidewall of framework (6) respectively, and plastic plate (4) is installed on the framework (6); Lead is connected left side sensor (8), left side amplifier (9), fast Fourier transform (FFT) analyser (1) and right sensor (3), right side amplifier (2), fast Fourier transform (FFT) analyser (1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100096113A CN100338461C (en) | 2005-01-11 | 2005-01-11 | Woods and wooden composite material elastic modulus non-destructive checkers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100096113A CN100338461C (en) | 2005-01-11 | 2005-01-11 | Woods and wooden composite material elastic modulus non-destructive checkers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1645129A true CN1645129A (en) | 2005-07-27 |
| CN100338461C CN100338461C (en) | 2007-09-19 |
Family
ID=34875386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100096113A Expired - Fee Related CN100338461C (en) | 2005-01-11 | 2005-01-11 | Woods and wooden composite material elastic modulus non-destructive checkers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100338461C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231280B (en) * | 2008-02-21 | 2011-05-04 | 中国林业科学研究院木材工业研究所 | Method for detecting live stumpage strength nondestructively |
| CN102670257A (en) * | 2012-05-16 | 2012-09-19 | 北京航空航天大学 | Heel width measuring device and measuring method suitable for ultrasonic osteoporosis tester |
| CN104777289A (en) * | 2015-04-08 | 2015-07-15 | 北京林业大学 | Method for efficiently and accurately determining flexural rigidity of structural laminated wood beam |
Family Cites Families (5)
| 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 |
| CN1069411C (en) * | 1996-04-26 | 2001-08-08 | 柳州铁路局工程处第一建筑工程段 | Modulus of elasticity method for investigating quality of concrete members |
| TWI225152B (en) * | 2003-01-29 | 2004-12-11 | Taiwan Forestry Res Inst | Method for non-destructive stress wave testing of wood |
| CN2762130Y (en) * | 2005-01-11 | 2006-03-01 | 胡英成 | Elastic nondestructive detection device for wood and wood composite |
-
2005
- 2005-01-11 CN CNB2005100096113A patent/CN100338461C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101231280B (en) * | 2008-02-21 | 2011-05-04 | 中国林业科学研究院木材工业研究所 | Method for detecting live stumpage strength nondestructively |
| CN102670257A (en) * | 2012-05-16 | 2012-09-19 | 北京航空航天大学 | Heel width measuring device and measuring method suitable for ultrasonic osteoporosis tester |
| CN104777289A (en) * | 2015-04-08 | 2015-07-15 | 北京林业大学 | Method for efficiently and accurately determining flexural rigidity of structural laminated wood beam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100338461C (en) | 2007-09-19 |
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