CN101655430B - Non-destructive testing experimental device of wood materials - Google Patents
Non-destructive testing experimental device of wood materials Download PDFInfo
- Publication number
- CN101655430B CN101655430B CN2009100729449A CN200910072944A CN101655430B CN 101655430 B CN101655430 B CN 101655430B CN 2009100729449 A CN2009100729449 A CN 2009100729449A CN 200910072944 A CN200910072944 A CN 200910072944A CN 101655430 B CN101655430 B CN 101655430B
- Authority
- CN
- China
- Prior art keywords
- sensor
- test specimen
- hollow bolt
- testing
- transverse rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates a non-destructive testing experimental device of wood materials and provides the device for testing the performances of the wood materials, which belongs to the devices for testing the performances of the wood materials. A basic table top and a support rod of the non-destructive testing device of the wood materials are well connected by using a cross clip, a conducting wire of a sensor penetrates a hollow bolt, then the conducting wire of the sensor is sequentially connected with an amplifier and a fast Fourier transform analyzer, and a tested part is clamped and fixed by regulating the support rod and the clamping degree of the hollow bolt. The device does not damage the tested part and the testing device, can realize the non-destructive testing and is characterized by simple structure, convenient and rapid operation, high testing efficiency, simple testing process, good testing quality and low testing cost.
Description
Technical field
The invention belongs to a kind of material property checkout equipment, be mainly used in the wood materials Determination of Modulus.
Background technology
In order to use wood materials with holding water, need the performance of wood materials be detected, its elastic modulus is and detects one of index.When detecting, it is a key issue that sensor and wood materials test specimen are fully contacted.At present, the artificial support of the employing that has makes test specimen contact with sensor.Though can reach the purpose of Non-Destructive Testing like this, because test specimen contacts with human body, on the precision that detects, certain error is arranged, and manually help test specimen to make that survey inspection process is loaded down with trivial details.The employing adhesive that also has sticks together sensor and test specimen, but do like this some drawbacks is arranged also: will sensor and test specimen be separated time-consuming, effort after having surveyed a test specimen by instrument; In the process that sensor and test specimen are separated, be easy to sensor and test specimen are damaged, and sensor is the precision measurement parts of price comparison costliness, can cause very big loss; Simultaneously because of usually test specimen can being caused damage in various degree after detecting, and then can not realize the purpose of Non-Destructive Testing, can not realize whole test specimens are detected, can only sampling Detection, experimental data can not be more accurate.
Summary of the invention
Purpose of the present invention is exactly problem and the defective that exists at above-mentioned prior art, be used in combination needs, a kind of non-destructive testing experimental device of wood materials is provided, by being prerequisite to not destroying detected object and detection part, it is detected effectively, reach raising accuracy of detection, detection efficiency, reduce labor intensity, guarantee that detected test specimen and detection part do not damage, simplify testing process and reduce the purpose that detects cost.
The basic design that this invention is created is, with basic table top with clamp part and connect, the lead of sensor passed hollow bolt with cross clamp, by the position of regulating support bar and the clamping degree of regulating hollow bolt test specimen clamped.With lead and the amplifier and the fast Fourier transform (FFT) analysis connection formation loop of sensor, so far constitute wood materials the cannot-harm-detection device again.
The beneficial effect of this invention is, realizes that test specimen is not destroyed fully, can improve the precision of experiment, reduces error, simplifies testing process, is suitable for the test specimen of various different sizes, and this experimental provision is simple in structure, processing ease.Do not destroy detection part, the detection efficiency height detects the quality height, and cost is also low.
Description of drawings
Accompanying drawing is the total synoptic diagram of non-destructive testing experimental device of wood materials and the key diagram of main composition parts thereof.
Fig. 1 is total synoptic diagram of this invention.
Fig. 2 is the front view of the basic table top of this invention.
Fig. 3 is the vertical view of the basic table top of this invention.
Fig. 4 is the synoptic diagram of hollow bolt.
Fig. 5 is the synoptic diagram that clamps part.
Piece number explanation among the figure:
1. base, 2. front rail, 3. rear transverse rod, 4. hollow bolt, 5. nut, 6. test specimen, 7. sensor, 8. sleeve, 9. reinforcing bar, 10. cross clamp, 11. support bars, 12. fast Fourier transform (FFT) analysers, 13. amplifiers, 14. foam pads.
Embodiment
Below in conjunction with accompanying drawing this invention being created optimum implementation is described in detail.Non-destructive testing experimental device of wood materials comprises: fast Fourier transform (FFT) analyser 12, amplifier 13, sensor 7, test specimen 6, support bar 11, foam pad 14, cross clamp 10, basic table top and clamping part.
In Fig. 2 and 3, basic table top is welded by base 1, front rail 2 and rear transverse rod 3.At the bottom of the front rail, the rear transverse rod height.Be mainly used in support and be connected rod member, play the effect of basic framework.
In Fig. 4, hollow bolt 4 is processed into by solid bolt, makes the lead of sensor 7 can pass hollow bolt, and the internal diameter of hollow bolt 4 is less than the external diameter of sensor end.
In Fig. 5, clamp part and be welded by nut 5, sleeve 8 and reinforcing bar 9.
At embodiment shown in Figure 1, be total synoptic diagram of non-destructive testing experimental device of wood materials.This non-destructive testing experimental device of wood materials embodiment is: with cross clamp 10 support bar 11 and basic table top are connected, foam pad 14 is embedded support bar 11 tops make their contacts good.The lead of sensor 7 is passed hollow bolt 4, with cross clamp 10 sensor 7 and the clamping part that connects is clipped on the support bar 11 then.According to the size of the specification of test specimen 6, regulate the position of support bar 11 and hollow bolt 4, test specimen 6 is clamped.The lead of sensor 7 is connected on the amplifier 13, and then the lead of amplifier 13 is connected on the fast Fourier transform (FFT) analyser 13 constitutes the loop.
When detecting wood materials test specimen 6, test specimen to be measured is placed between the left and right sides sensor 7,, then hollow bolt 4 is tightened according to the position of the size adjustment support bar 11 of test specimen specification with normal beam technique.Because the external diameter of sensor 7 end nut greater than the internal diameter of hollow bolt 4, clamps test specimen 6 under the effect that hollow bolt 4 is tightened, at this moment, sensor 7 closely contacts with test specimen 6.The impulsive force that produces when an end of test specimen 6 utilizes the propelling pencil core to fracture is as transmitting, the sensor 7 of test specimen 6 other ends receives signal, transmit and acknowledge(ment) signal passes to fast Fourier transform (FFT) analyser 12 by after amplifying, measure the mistiming of activation signal and acknowledge(ment) signal, utilize conventional formula: V=L/T E=ρ V
2In the formula: V is a longitudinal wave propagation speed, and L is a test specimen length, and T is the travel-time, and E is the dynamic modulus of elasticity, and ρ is the density of test specimen.After experiment finishes, hollow bolt 4 is unscrewed, test specimen is under situation about not being destroyed, and is convenient, fast and measure the physical property of wood materials test specimen accurately, thereby reaches the purpose of detection.
Claims (2)
1. non-destructive testing experimental device of wood materials, mainly comprise support bar (11), fast Fourier transform (FFT) analyser (12), amplifier (13), sensor (7), test specimen (6), foam pad (14), cross clamp (10), basic table top and clamping part, wherein, described basic table top is by steel plate base (1), front rail (2) and rear transverse rod (3) are welded, described front rail (2) and rear transverse rod (3) are welded into and all are welded on the base (1) with reinforcing bar, front rail (2) is low, rear transverse rod (3) height, two support bars (11) are fixedly clamped on front rail (2) by cross clamp (10), in addition two support bars (11) by cross clamp (10) be fixedly clamped rear transverse rod (3) go up and one be positioned at one on the left side and be positioned at the right, two support bars (11) top on front rail (2) has embedded foam pad respectively, these two support bars (11) are contacted well with test specimen (6), left side sensor (7) and right sensor (7) are installed in respectively on each self-corresponding hollow bolt (4), and the lead of left and right sides sensor (7) passes each self-corresponding hollow bolt (4) respectively, be connected with corresponding amplifier (13) separately, connect with the fast Fourier transform (FFT) analyser (12) of this device again, the left sensor (7) that will connect with cross clamp (10) and the left side of its correspondence clamp part and are clipped on the left support bar (11) on the rear transverse rod (3), and the right sensor (7) that will connect with cross clamp (10) and the right side of its correspondence clamp part and are clipped on the right support bar (11) on the described rear transverse rod (3), size according to the specification of described test specimen (6), the position of two support bars (11) about on the adjusting left and right sides each self-corresponding hollow bolt (4) of sensor and the rear transverse rod (3), test specimen (6) is clamped, and between two sensors (7), described left and right sides sensor (7) closely contacted with test specimen (6) about test specimen (6) placed.
2. experimental provision according to claim 1, it is characterized in that: the hollow bolt corresponding with left sensor clamps part with a left side and cooperates, the hollow bolt corresponding with right sensor cooperates with the right part that clamps, and two hollow bolts (4) are all made through solid bolt, are processed into the hollow bolt (4) of satisfying the demand according to the different model of sensor (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100729449A CN101655430B (en) | 2009-09-22 | 2009-09-22 | Non-destructive testing experimental device of wood materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100729449A CN101655430B (en) | 2009-09-22 | 2009-09-22 | Non-destructive testing experimental device of wood materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101655430A CN101655430A (en) | 2010-02-24 |
| CN101655430B true CN101655430B (en) | 2011-08-31 |
Family
ID=41709806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100729449A Expired - Fee Related CN101655430B (en) | 2009-09-22 | 2009-09-22 | Non-destructive testing experimental device of wood materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101655430B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636148B (en) * | 2012-04-16 | 2015-03-04 | 安徽农业大学 | Nondestructive measurement method for tree deformation |
| CN110095351A (en) * | 2019-05-29 | 2019-08-06 | 南京林业大学 | Wood materials elasticity modulus detection device under a kind of humid tropical condition |
| CN111307871B (en) * | 2019-12-30 | 2022-06-07 | 北京农学院 | Be used for not having (declining) to decrease and detect little test piece material performance test piece fixing device of wooden structure |
-
2009
- 2009-09-22 CN CN2009100729449A patent/CN101655430B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101655430A (en) | 2010-02-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2018223940A1 (en) | Impact stress wave detection system | |
| CN106908177B (en) | A kind of device measuring anisotropic material plane stress | |
| CN107063526B (en) | The detection method of steel member absolute stress distribution based on critical refraction longitudinal wave | |
| CN101655430B (en) | Non-destructive testing experimental device of wood materials | |
| CN103760044A (en) | Device and method for dynamic splitting tensile mechanical property test of cement-based material | |
| CN102680573B (en) | Timber vibration property tester based on uniform force knocking method | |
| CN209727864U (en) | A kind of timber stress wave nondestructive testing device | |
| CN104729921B (en) | A kind of test apparatus and test method that soil body tensile strength is measured using centrifugal force | |
| CN110823684A (en) | Steel tensile property measuring device and system | |
| CN204255748U (en) | The dynamic checkout unit of timber Poisson ratio | |
| CN110455927A (en) | A kind of movable adjustable ultrasonic probe fixture | |
| CN201051062Y (en) | Dynamic impact analysis instrument | |
| CN106093197A (en) | Large scale wood-based plate elastic modelling quantity and the lossless detection method of In-plane Shear Modulus | |
| CN203643264U (en) | Maximum force elongation measuring device for steel strands | |
| CN202522482U (en) | Extensometer for measuring yield strength of plate-shaped tensile test sample of pipeline steel | |
| CN100338461C (en) | Woods and wooden composite material elastic modulus non-destructive checkers | |
| CN209356103U (en) | A kind of pressure lever type fastening elastic rod buckle press on-line measurement system | |
| CN103149107A (en) | Method for manually adjusting clamping distance tested by tension tester | |
| CN2762130Y (en) | Elastic nondestructive detection device for wood and wood composite | |
| CN100338462C (en) | Woods and wooden composite material shearing modulus non destructive checkers | |
| CN208846029U (en) | A kind of block form Sound intensity probe fixed clamping device | |
| CN102778405B (en) | The horizontal calibrating installation of pulling force test system and extensometer thereof | |
| CN207232096U (en) | A kind of transducer clamping auxiliary device for ultrasonic defect detection | |
| CN2765186Y (en) | Non-destructive test device for shear modulus of wood and xyloid composite materials | |
| CN101696957B (en) | Online nondestructive detecting instrument for wood materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20120922 |