CN102680573B - Timber vibration property tester based on uniform force knocking method - Google Patents
Timber vibration property tester based on uniform force knocking method Download PDFInfo
- Publication number
- CN102680573B CN102680573B CN201210138064.9A CN201210138064A CN102680573B CN 102680573 B CN102680573 B CN 102680573B CN 201210138064 A CN201210138064 A CN 201210138064A CN 102680573 B CN102680573 B CN 102680573B
- Authority
- CN
- China
- Prior art keywords
- support bar
- scale bar
- bar
- side support
- uniform force
- 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
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A timber vibration property tester based on a uniform force knocking method belongs to an instrument material property tester. The tester comprises a horizontally placed supporting base, a fixed left supporting pole, a movable right scale bar, a horizontally arranged adjustable cantilever, a test specimen clamp and an exciting ball; the left supporting pole is arranged in the left-side vertical direction of the supporting base; the right scale bar is arranged in the right-side vertical direction of the supporting base; the adjustable cantilever is arranged on the upper parts of the left supporting pole and the right scale bar; the test specimen clamp is fixedly mounted at a position on the adjustable cantilever, which is close to the left supporting pole; and the exciting ball is hung by a thread between the test specimen clamp on the adjustable cantilever and the right scale bar. When in use, the tester can apply the same excitation each time when a soundboard is tested; and tester has a simple structure, is convenient to operate, and can apply uniform force excitation on tested specimens, the requirement for testers is reduced and the testing efficiency is increased.
Description
Technical field
The timber vibration performance pick-up unit that knocks method based on uniform force belongs to a kind of instrument material performance detection apparatus, relates in particular to the performance detection apparatus of the instrument material of a kind of timber and composite wooden material.
Background technology
Timber and composite wooden material are the important materials of making musical instrument soundboard, the quality of its acoustic vibration performance has determined the acoustic quality of musical instrument product to a great extent, for manufacturing the musical instrument of tool good acoustic quality, just must detect the acoustic vibration performance of timber and composite wooden material.In the time detecting, how to excite test specimen to make it produce vibration, can produce larger impact to test result.At present mostly be that tester is by manual mode control blade, little batten etc., to encourage test specimen, but there is more drawback in this energisation mode: the one, and dynamical encourage is wayward, and the strength of each excitation is all different; The 2nd, in the time of excitation, blade or little batten etc. are wayward with the duration of contact of test specimen, in the time that duration of contact is long, easily make vibration signal produce standing wave; The 3rd, while manually controlling blade or little batten equal excitation test specimen, easily produce double hit phenomenon, the 4th, be difficult to each same position that is all activated at test specimen, these reasons all can exert an adverse impact to the detection of timber and composite wooden material acoustic vibration performance, and tester also needs the training of long period could grasp the gimmick of excitation.
Summary of the invention
The present invention is directed to above-mentioned the problems of the prior art, design a kind of timber vibration performance pick-up unit that knocks method based on uniform force, this device is not only simple in structure, easy to operate, and can apply uniform force excitation to tested sample, reduces requirement, raising detection efficiency to tester.
The object of the present invention is achieved like this:
Knock the timber vibration performance pick-up unit of method based on uniform force, comprise the base for supporting of horizontal positioned, be arranged on the left side support bar of base for supporting left side vertical direction, between left side support bar and base for supporting for being fixedly connected with; Be arranged on the right side scale bar of base for supporting right side vertical direction, right side scale bar can keep vertical direction support bar or move away from left side support bar direction to the left; Both be connected with left side support bar, the Adjustable cantilever beam horizontal arrangement being connected with right side scale bar is again on the top of left side support bar and right side scale bar; Near left side post position, be installed with piece fixture at Adjustable cantilever beam; Piece fixture on Adjustable cantilever beam and scale bar centre position, right side, hang an excitation bead by fine rule.
The above-mentioned timber vibration performance pick-up unit that knocks method based on uniform force, is connected by the pad chi platform that is arranged on base for supporting upper surface right side horizontal positioned between described right side scale bar and base for supporting; Described pad chi platform is provided with the U-shaped chute of horizontal direction, U-shaped chute direction place straight line is positioned at left side support bar, the determined plane of right side scale bar, right side scale bar support bar or move away from left side support bar direction to the left in U-shaped chute limited range.
The above-mentioned timber vibration performance pick-up unit that knocks method based on uniform force, described Adjustable cantilever beam is made up of stiff end and movable end, and movable end can stretch in stiff end; At stiff end and movable end upper surface, be provided with the scale groove of equidistant distribution; Described excitation bead is suspended in the scale groove in piece fixture on Adjustable cantilever beam and scale bar centre position, right side by fine rule.
The above-mentioned timber vibration performance pick-up unit that knocks method based on uniform force, the intersection position of described left side support bar and left side support bar, scale bar place, right side plane is provided with groove.
The above-mentioned timber vibration performance pick-up unit that knocks method based on uniform force, described stiff end left side is provided with threaded hole, and bolt is screwed into threaded hole through the groove on the support bar of left side, realizes stiff end and is fixedly connected with left side support bar; The right side of described movable end is provided with the through hole identical with right side scale bar cross-sectional area shape, and this through hole direction is vertical direction, and between the scale bar of right side, is clearance fit.
Compared with the existing technology, pick-up unit of the present invention is as long as excitation bead quality is fixed, fine rule length is fixed, the position of fine rule and semi-girder is fixed, can realize and when soundboard detection, all apply identical excitation at every turn, this device is not only simple in structure, easy to operate, and can apply uniform force excitation to tested sample, reduce requirement, raising detection efficiency to tester.
Brief description of the drawings
Fig. 1 is structure of the detecting device schematic diagram of the present invention.
Fig. 2 is the left view of left side support bar.
Fig. 3 is movable end and right side scale bar matching relationship vertical view.
In figure: 1 base for supporting, 2 left side support bars, 2-1 groove, 3 tested sample, 4 piece fixtures, 5 Adjustable cantilever beams, 5-1 stiff end, 5-2 movable end, 6 fine rules, 7 right side scale bars, 8 excitation beads, 9 pad chi platforms, 9-1U type chute.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.
The timber vibration performance pick-up unit that knocks method based on uniform force, structural representation as shown in Figure 1.This device comprises the base for supporting 1 of horizontal positioned, is arranged on the left side support bar 2 of base for supporting 1 left side vertical direction, between left side support bar 2 and base for supporting 1 for being fixedly connected with; Be arranged on the right side scale bar 7 of base for supporting 1 right side vertical direction, between right side scale bar 7 and base for supporting 1, be connected by the pad chi platform 9 that is arranged on base for supporting 1 upper surface right side horizontal positioned; Both be connected with left side support bar 2, Adjustable cantilever beam 5 horizontal arrangement that are connected with right side scale bar 7 are again the top with right side scale bar 7 at left side support bar 2; Near left side support bar 2 positions, be installed with piece fixture 4 at Adjustable cantilever beam 5, test specimen 3 upper ends are clamped by piece fixture 4, and vertical direction hangs; Above-mentioned Adjustable cantilever beam 5 is made up of stiff end 5-1 and movable end 5-2, and movable end 5-2 can stretch in stiff end 5-1; At stiff end 5-1 and movable end 5-2 upper surface, be provided with the scale groove 5-3 of equidistant distribution; In piece fixture 4 on Adjustable cantilever beam 5 and the scale groove 5-3 in right side scale bar 7 centre positions, hang an excitation bead 8 by not tensile fine rule 6.
Above-mentioned pad chi platform 9 is provided with the U-shaped chute 9-1 of horizontal direction, U-shaped chute 9-1 direction place straight line is positioned at left side support bar 2, the determined plane of right side scale bar 7, right side scale bar 7 support bar 2 or move away from left side support bar 2 directions to the left in U-shaped chute 9-1 limited range; In the time that right side scale bar 7 moves, the movable end 5-2 of Adjustable cantilever beam 5 is flexible in stiff end 5-1, ensures that right side scale bar 7 is all the time in vertical state.
Above-mentioned left side support bar 2 is provided with groove 2-1 with the intersection position of left side support bar 2, right side scale bar 7 place planes, and the left view of left side support bar 2 as shown in Figure 2.Above-mentioned stiff end 5-1 left side is provided with threaded hole, and bolt is screwed into the threaded hole on stiff end 5-1 through the groove 2-1 on left side support bar 2, realizes stiff end 5-1 and is fixedly connected with left side support bar 2; The right side of above-mentioned movable end 5-2 is provided with the through hole identical with right side scale bar 7 cross-sectional area shapes, and this through hole direction is vertical direction, and between right side scale bar 7, is clearance fit, and the vertical view Local map of matching relationship as shown in Figure 3.
In use, first testing staff adjusts the length of the position of right side scale bar 7 in U-shaped chute 9-1, fine rule 6, quality with this fine rule 6 corresponding scale groove 5-3 and excitation bead 8; Be extended state keeping fine rule 6, after excitation bead 8 is risen to right side scale bar 7 positions, let go, allow excitation bead 8 clash into test specimen 3, when excitation bead 8 is from test specimen 3 is upspring, testing staff catches excitation bead 8 with hand, prevents from encouraging bead 8 secondary excitation test specimens 3.
Claims (4)
1. knock the timber vibration performance pick-up unit of method based on uniform force, it is characterized in that comprising the base for supporting (1) of horizontal positioned, be arranged on the left side support bar (2) of base for supporting (1) left side vertical direction, between left side support bar (2) and base for supporting (1) for being fixedly connected with; Be arranged on the right side scale bar (7) of base for supporting (1) right side vertical direction, right side scale bar (7) can keep vertical direction support bar (2) or move away from left side support bar (2) direction to the left; Both be connected with left side support bar (2), Adjustable cantilever beam (5) horizontal arrangement being connected with right side scale bar (7) is again the top with right side scale bar (7) at left side support bar (2); Near left side support bar (2) position, be installed with piece fixture (4) at Adjustable cantilever beam (5); Piece fixture (4) on Adjustable cantilever beam (5) and right side scale bar (7) centre position, hang an excitation bead (8) by fine rule (6); Between described right side scale bar (7) and base for supporting (1), be connected by the pad chi platform (9) that is arranged on base for supporting (1) upper surface right side horizontal positioned; Described pad chi platform (9) is provided with the U-shaped chute (9-1) of horizontal direction, U-shaped chute (9-1) direction place straight line is positioned at left side support bar (2), the determined plane of right side scale bar (7), right side scale bar (7) support bar (2) or move away from left side support bar (2) direction to the left in U-shaped chute (9-1) limited range.
2. the timber vibration performance pick-up unit that knocks method based on uniform force according to claim 1, it is characterized in that described Adjustable cantilever beam (5) is made up of stiff end (5-1) and movable end (5-2), movable end (5-2) can stretch in stiff end (5-1); At stiff end (5-1) and movable end (5-2) upper surface, be provided with the scale groove (5-3) of equidistant distribution; Described excitation bead (8) is suspended in the scale groove in piece fixture (4) on Adjustable cantilever beam (5) and right side scale bar (7) centre position by fine rule (6).
3. the timber vibration performance pick-up unit that knocks method based on uniform force according to claim 1, is characterized in that described left side support bar (2) and the intersection position of left side support bar (2), right side scale bar (7) place plane are provided with groove (2-1).
4. the timber vibration performance pick-up unit that knocks method based on uniform force according to claim 2, it is characterized in that described stiff end (5-1) left side is provided with threaded hole, bolt is screwed into threaded hole through the groove (2-1) on left side support bar (2), realizes stiff end (5-1) and is fixedly connected with left side support bar (2); The right side of described movable end (5-2) is provided with the through hole identical with right side scale bar (7) cross-sectional area shape, and this through hole direction is vertical direction, and is clearance fit between right side scale bar (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138064.9A CN102680573B (en) | 2012-05-07 | 2012-05-07 | Timber vibration property tester based on uniform force knocking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138064.9A CN102680573B (en) | 2012-05-07 | 2012-05-07 | Timber vibration property tester based on uniform force knocking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102680573A CN102680573A (en) | 2012-09-19 |
| CN102680573B true CN102680573B (en) | 2014-07-16 |
Family
ID=46812821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210138064.9A Expired - Fee Related CN102680573B (en) | 2012-05-07 | 2012-05-07 | Timber vibration property tester based on uniform force knocking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102680573B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308605B (en) * | 2013-05-29 | 2016-03-02 | 苏州市职业大学 | The multidirectional adjustable support consumed in a kind of low frequency mechanical spectrometer is measured |
| CN106290152A (en) * | 2016-08-29 | 2017-01-04 | 北京星航机电装备有限公司 | A kind of in-situ detection method for composite complex profile bonding quality |
| CN110595601B (en) * | 2019-04-26 | 2021-10-15 | 深圳市豪视智能科技有限公司 | Bridge vibration detection method and related device |
| CN110245651B (en) * | 2019-08-09 | 2019-11-29 | 深圳市广宁股份有限公司 | Quality intelligent detection method and relevant apparatus |
| CN111060597A (en) * | 2020-01-09 | 2020-04-24 | 东北林业大学 | Controllable excitation device for acoustic vibration detection |
| CN113108894A (en) * | 2021-03-30 | 2021-07-13 | 华南理工大学 | Transient sound field measuring system and method of musical instrument soundboard based on audio array acquisition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1238582A2 (en) * | 2001-03-05 | 2002-09-11 | FPS Food Processing Systems B.V. | Method and device for determining vibration characteristics of vibrated articles such as eggs |
| CN2762130Y (en) * | 2005-01-11 | 2006-03-01 | 胡英成 | Elastic nondestructive detection device for wood and wood composite |
| CN101793873A (en) * | 2010-03-02 | 2010-08-04 | 王宏伟 | Testing method of characteristics of sound vibration and point vibration of piano sound board and special equipment thereof |
| CN202522541U (en) * | 2012-05-07 | 2012-11-07 | 刘镇波 | Wood vibration performance detection device based on uniform-force knocking method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2504612B2 (en) * | 1990-08-13 | 1996-06-05 | ミサワホーム株式会社 | Furniture strength tester |
| JP2908987B2 (en) * | 1994-08-03 | 1999-06-23 | 株式会社ノリタケカンパニーリミテド | Ceramic impact strength measuring device |
| JP2001235452A (en) * | 2000-02-25 | 2001-08-31 | Mitsubishi Electric Corp | Defect measuring device and method of specimen |
| JP2005300276A (en) * | 2004-04-08 | 2005-10-27 | Naberu:Kk | Nondestructive defect detection device for thin sheet |
-
2012
- 2012-05-07 CN CN201210138064.9A patent/CN102680573B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1238582A2 (en) * | 2001-03-05 | 2002-09-11 | FPS Food Processing Systems B.V. | Method and device for determining vibration characteristics of vibrated articles such as eggs |
| CN2762130Y (en) * | 2005-01-11 | 2006-03-01 | 胡英成 | Elastic nondestructive detection device for wood and wood composite |
| CN101793873A (en) * | 2010-03-02 | 2010-08-04 | 王宏伟 | Testing method of characteristics of sound vibration and point vibration of piano sound board and special equipment thereof |
| CN202522541U (en) * | 2012-05-07 | 2012-11-07 | 刘镇波 | Wood vibration performance detection device based on uniform-force knocking method |
Non-Patent Citations (5)
| Title |
|---|
| JP平4-95842A 1992.03.27 |
| JP特开2001-235452A 2001.08.31 |
| JP特开2005-300276A 2005.10.27 |
| 刘镇波等.实际尺寸乐器音板用云杉属木材的声学振动特性.《林业科学》.2007,第43卷(第8期), |
| 实际尺寸乐器音板用云杉属木材的声学振动特性;刘镇波等;《林业科学》;20070830;第43卷(第8期);第100-101页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102680573A (en) | 2012-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102680573B (en) | Timber vibration property tester based on uniform force knocking method | |
| WO2020232630A1 (en) | Adjustable contact force type ultrasonic guided wave damage detection system | |
| CN103743305A (en) | Nut internal screw thread detection machine | |
| CN108195679A (en) | A kind of device and test method for measuring wire rod tiny sample tensile strength | |
| CN104198312B (en) | A kind of frock for measuring clip-tough | |
| CN102564870A (en) | Crack-propagation test method and device | |
| KR100856734B1 (en) | The standard test system for the cable tension measurement of suspension system | |
| RU129245U1 (en) | INSTALLATION FOR EVALUATING THE FATIGUE OF ASPHALT CONCRETE DURING CYCLIC DYNAMIC INFLUENCES | |
| CN202522541U (en) | Wood vibration performance detection device based on uniform-force knocking method | |
| CN102692458A (en) | Wood and wood composite material nondestructive testing excitation device based on uniform force knocking method | |
| CN201637723U (en) | Sample support device of pulse excitation elastic modulus tester | |
| CN205861471U (en) | A kind of engineering quality detection armored concrete hardness detecting instrument | |
| CN105466774A (en) | Handheld concrete compression testing apparatus | |
| CN205228948U (en) | Portable concrete compressive strength tester | |
| CN202196007U (en) | Peel strength testing device | |
| CN107345877A (en) | A kind of concrete axial breaks experiment test block mould | |
| CN202599916U (en) | Non-destructive testing exciting device for wood and woodiness composite materials based on uniform force knocking | |
| CN101655430B (en) | Non-destructive testing experimental device of wood materials | |
| CN109632491A (en) | It is a kind of for testing the device and its application method of test specimen tensile strength | |
| CN209014412U (en) | A kind of plastic impact tester | |
| CN202994600U (en) | Extensometer for griping samples of different specifications | |
| CN202453255U (en) | Plastic pendulum bob type impact and tensile test device | |
| CN103674701A (en) | Bending load test device, application and using method thereof | |
| CN209690034U (en) | A kind of multi-functional test specimen support device of Hopkinson bar test | |
| RU137943U1 (en) | INSTALLATION FOR DEMONSTRATION OF NON-CONTACT MEASUREMENT AREA OF A NON-CONDUCTING THREADY SAMPLE |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20160507 |