CN104964877A - Rigidity testing device and system - Google Patents
Rigidity testing device and system Download PDFInfo
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- CN104964877A CN104964877A CN201510454336.XA CN201510454336A CN104964877A CN 104964877 A CN104964877 A CN 104964877A CN 201510454336 A CN201510454336 A CN 201510454336A CN 104964877 A CN104964877 A CN 104964877A
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Abstract
The invention discloses a rigidity testing device and system. The device comprises a testing support, installation parts, displacement sensors, a force applying part and a pressure sensor, wherein the testing support comprises a first rod body, a second rod body, a third rod body and a fourth rod body which are arranged in parallel; the installation parts are fixed on the first rod body and the second rod body; the displacement sensors are installed on the installation parts; the force applying part is connected with the third rod body and the fourth rod body in a sliding mode and can slide along the extension directions of the third rod body and the fourth rod body, wherein the displacement sensors are positioned at one side of the force applying part; the pressure sensor is connected with the force applying part. The rigidity testing device can simultaneously test the pressure and the generated displacement of a to-be-tested element, so that the rigidity of the to-be-tested element is tested; the rigidity testing device is simple in structure, is small in size and is easy to carry.
Description
Technical field
The present invention relates to auto parts and components field tests, particularly relate to a kind of device for testing stiffness and system.
Background technology
Rigidity represents the ability by the material of External Force Acting, component or structure resistance to deformation, and rigidity is higher, object performance more " firmly ".Its result can affect many-sided performance such as serviceable life and natural frequency of component, the calculating of rigidity value needs power and displacement two physical quantitys, more commonly ergometry and displacement can be realized separately in existing testing apparatus, as hand-held dynamometer, clock gauge etc., although lighter, but one of them physical quantity can only be measured, such two independently equipment put together use be very difficult; And can realizable force and displacement measure simultaneously be all some main equipments as MTS equipment, this kind equipment is comparatively large because of volume, mostly is and fixes on the ground, is difficult to use flexibly.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of device for testing stiffness and system, the device structure solving ergometry and displacement simultaneously in prior art is complicated, and volume is large, the problem that can not use flexibly.
According to one aspect of the present invention, provide a kind of device for testing stiffness, comprising:
Test bracket, test bracket comprises first body of rod, second body of rod, the 3rd body of rod and the 4th body of rod that be arranged in parallel;
Be fixed on the installation portion on first body of rod and second body of rod;
Be installed on the displacement transducer on installation portion;
The force section be slidably connected with the 3rd body of rod and the 4th body of rod, can slide along the bearing of trend of the 3rd body of rod and the 4th body of rod in force section; Wherein, displacement transducer is positioned at the side of force section; And
Pressure transducer is arranged on force section.
Alternatively, test bracket also comprises: the first platform and the second platform, and wherein, first body of rod, second body of rod, the 3rd body of rod and the 4th body of rod are vertically installed between the first platform and the second platform.
Alternatively, device for testing stiffness also comprises: be arranged at the firm handle on the first platform.
Alternatively, the second platform is provided with a through hole, force section is " T " font, and first end and the 3rd body of rod of force section are slidably connected, and the second end and the 4th body of rod of force section are slidably connected, and the 3rd end of force section is connected with pressure transducer through through hole.
Alternatively, device for testing stiffness also comprises: with the pressure head of force section three-terminal link.
According to another aspect of the present invention, additionally provide a kind of rigidity testing system, comprise device for testing stiffness as above, and a data collector, the first input end of data collector is connected with displacement transducer, second input end of data collector is connected with pressure transducer, and the output terminal of data collector is connected with a display device.
The beneficial effect of embodiments of the invention is: a kind of device for testing stiffness and system, applies a test pressure by force section to test specimen to be measured, and pressure transducer can record this test pressure size; And test out the displacement of test specimen to be measured under test pressure by displacement transducer, thus record the rigidity of this test specimen to be measured according to test pressure size and displacement; In addition, the structure of this device for testing stiffness is simple, and compact, is easy to carry about with one, and possesses very high dirigibility.
Accompanying drawing explanation
Fig. 1 represents the structural representation of device for testing stiffness of the present invention;
Fig. 2 represents the annexation figure of rigidity testing system of the present invention.
Wherein in figure: 1, test bracket, 2, installation portion, 3, displacement transducer, 4, force section, 5, pressure transducer, 6, firm handle, 7, pressure head;
11, first body of rod, 12, second body of rod, the 13, the 3rd body of rod, the 14, the 4th body of rod, the 15, first platform, the 16, second platform.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present invention is described in more detail.Although show exemplary embodiment of the present invention in accompanying drawing, however should be appreciated that can realize the present invention in a variety of manners and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the present invention can be understood, and complete for scope of the present invention can be conveyed to those skilled in the art.
Embodiment
As shown in Figure 1, The embodiment provides a kind of device for testing stiffness, specifically comprise: test bracket 1, installation portion 2, displacement transducer 3, force section 4 and pressure transducer 5.Wherein, test bracket 1 comprises first body of rod 11, second body of rod 12, the 3rd body of rod 13 and the 4th body of rod 14 that be arranged in parallel, and installation portion 2 is fixed on first body of rod 11 and second body of rod 12, and displacement transducer 3 is installed on installation portion 2; Force section 4 is arranged at the below of displacement transducer 3, and is slidably connected with the 3rd body of rod 13 and the 4th body of rod 14, and in addition, can slide along the bearing of trend of the 3rd body of rod 13 and the 4th body of rod 14 in force section 4, displacement transducer 3 can test the displacement of force section 4.Pressure transducer 5 is arranged on force section 4, and pressure transducer can test the test force size on force section 4.Wherein, the two ends of force section 4 are provided with force handle, by artificially applying test force to it, also or by other means apply test force to it, force mechanism as conventional in hydraulic pressure or air pressure etc.
Apply a test pressure by force section 4 to test specimen to be measured, pressure transducer 5 can record this test pressure size; And test out the deformation quantity of test specimen to be measured under test pressure by displacement transducer 3, i.e. displacement, thus the rigidity recording this test specimen to be measured according to test pressure size and displacement; In addition, the structure of this device for testing stiffness is simple, and compact, is easy to carry about with one, and possesses very high dirigibility.
Alternatively, this test bracket 1 also comprises: the first platform 15 and second platform 16, first body of rod 11, second body of rod 12, the 3rd body of rod 13 and the 4th body of rod 14 are vertically installed between the first platform 15 and the second platform 16 respectively.Wherein, the 3rd body of rod 13 and the 4th body of rod 14 are all set to the cylindrical body of rod, to reduce the friction force between force section 4.
Alternatively, the first platform 15 is also provided with a firm handle 6, when needs test one test specimen to be measured, plays the effect of stablizing this firm proving installation by this firm handle, so that apply test pressure to test specimen to be measured.
Alternatively, second platform 16 is provided with a through hole, force section 4 is set to " T " font, first end and the 3rd body of rod 13 of force section 4 are slidably connected, second end and the 4th body of rod 14 of force section 4 are slidably connected, and the 3rd end of force section 4 is connected with pressure transducer 5 through the through hole of the second platform 16.Wherein above-mentioned being slidably connected can be bearing connection, pinned connection etc.
Alternatively, in order to the test pressure ensureing to be applied to test specimen to be measured acts on on test specimen to be measured equably, this device for testing stiffness also comprises a pressure head 7, and this pressure head 7 and the three-terminal link of force section 4, be that is connected with pressure transducer 5 and pressure head 7 in turn at the 3rd end of force section 4.Pressure transducer 5 can test the test pressure of force section 4 the 3rd end, and that is pressure transducer 5 can test the test pressure on pressure head 7.Relation between the displacement that the test specimen to be measured that the test pressure so just can tested according to pressure transducer 5 and displacement transducer 3 are tested produces under test pressure, calculates the rigidity of this test specimen to be measured.
According to another aspect of the embodiment of the present invention, additionally provide a kind of rigidity testing system, specifically comprise: device for testing stiffness as above, and a data collector.Wherein, the first input end of data collector is connected with displacement transducer 3, and the second input end of data collector is connected with pressure transducer 5, and the output terminal of data collector is connected with a display device.Wherein, data collector is used for the signal that displacement transducer 3 exports to be converted to displacement, and the signal that pressure transducer exports is converted to force value.The effect of display device is shown the value that data collector exports, with the clear test pressure and the deformation quantity that reflect test specimen to be measured intuitively.
To sum up, apply a test pressure by force section to test specimen to be measured, pressure transducer can record this test pressure size; And test out the displacement of test specimen to be measured under test pressure by displacement transducer, thus record the rigidity of this test specimen to be measured according to test pressure size and displacement; In addition, the structure of this device for testing stiffness is simple, and compact, is easy to carry about with one, and possesses very high dirigibility.
Above is the preferred embodiment of the present invention, should be understood that the ordinary person for the art, and can also make some improvements and modifications not departing under principle prerequisite of the present invention, these improvements and modifications are also in protection scope of the present invention.
Claims (6)
1. a device for testing stiffness, is characterized in that, comprising:
Test bracket (1), described test bracket (1) comprises first body of rod (11), second body of rod (12), the 3rd body of rod (13) and the 4th body of rod (14) that be arranged in parallel;
Be fixed on the installation portion (2) on described first body of rod (11) and described second body of rod (12);
Be installed on the displacement transducer (3) on described installation portion (2);
The force section (4) be slidably connected with described 3rd body of rod (13) and described 4th body of rod (14), described force section (4) can slide along the bearing of trend of described 3rd body of rod (13) and described 4th body of rod (14); Wherein, institute's displacement sensors (3) is positioned at the side of described force section (4); And
Pressure transducer (5) is arranged on described force section (4).
2. device for testing stiffness according to claim 1, it is characterized in that, described test bracket (1) also comprises: the first platform (15) and the second platform (16), wherein, described first body of rod (11), second body of rod (12), the 3rd body of rod (13) and the 4th body of rod (14) are vertically installed between described first platform (15) and described second platform (16).
3. device for testing stiffness according to claim 2, is characterized in that, described device for testing stiffness also comprises: be arranged at the firm handle (6) on described first platform (15).
4. device for testing stiffness according to claim 2, it is characterized in that, described second platform (16) is provided with a through hole, described force section (4) is " T " font, first end and described 3rd body of rod (13) of described force section (4) are slidably connected, second end and described 4th body of rod (14) of described force section (4) are slidably connected, and the 3rd end of described force section (4) is connected with described pressure transducer (5) through described through hole.
5. device for testing stiffness according to claim 4, is characterized in that, described device for testing stiffness also comprises: with the pressure head (7) of described force section (4) three-terminal link.
6. a rigidity testing system, it is characterized in that, comprise the device for testing stiffness as described in any one of Claims 1 to 5, described rigidity testing system also comprises a data collector, the first input end of described data collector is connected with institute's displacement sensors (3), second input end of described data collector is connected with described pressure transducer (5), and the output terminal of described data collector is connected with a display device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510454336.XA CN104964877B (en) | 2015-07-29 | 2015-07-29 | A kind of device for testing stiffness and system |
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| CN201510454336.XA CN104964877B (en) | 2015-07-29 | 2015-07-29 | A kind of device for testing stiffness and system |
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| CN104964877A true CN104964877A (en) | 2015-10-07 |
| CN104964877B CN104964877B (en) | 2017-10-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651527A (en) * | 2016-03-02 | 2016-06-08 | 武汉信测标准技术服务有限公司 | Portable rigidity test bench |
| CN107063598A (en) * | 2017-04-11 | 2017-08-18 | 北京航空航天大学 | A kind of labyrinth stiffness parameters automatic test platform |
| CN107219071A (en) * | 2017-07-10 | 2017-09-29 | 宁波赛福汽车制动有限公司 | Hydraulic motorcycle brake system rigidity test frock |
| CN113084812A (en) * | 2021-04-09 | 2021-07-09 | 吉林大学 | Method for evaluating rigidity performance of tail end of robot |
| CN113588418A (en) * | 2021-07-08 | 2021-11-02 | 一汽奔腾轿车有限公司 | Device and method for measuring surface rigidity of automobile body covering part |
Citations (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1501083A (en) * | 1973-12-22 | 1978-02-15 | Parry R | Testing of soils and like materials |
| US5209124A (en) * | 1989-09-02 | 1993-05-11 | H.F. & Ph.F. Reemtsma Gmbh & Co. | Method and apparatus for determining the filling capacity of tobacco and the hardness of cigarettes |
| JPH07225181A (en) * | 1994-02-14 | 1995-08-22 | Kawasaki Steel Corp | Method and apparatus for measurement of dent property of metal material |
| JP2002296159A (en) * | 2001-03-30 | 2002-10-09 | Matsumura Gumi Corp | Test apparatus for loading flat plate and recording medium |
| CN1392400A (en) * | 2002-08-09 | 2003-01-22 | 中国建筑材料科学研究院 | Non-destructive testing method and device for mechanical property of brittle material |
| CN1395684A (en) * | 2000-01-19 | 2003-02-05 | 阿姆科尔有限公司 | Measuring apparatus and method for properties of board products |
| CN2638052Y (en) * | 2001-10-15 | 2004-09-01 | 东风汽车公司 | Sensor used for measuring hardness of covering material surface |
| CN2713460Y (en) * | 2004-05-18 | 2005-07-27 | 柴东华 | Golf rigidity measurement instrument |
| CN1746653A (en) * | 2004-09-07 | 2006-03-15 | 中国科学院力学研究所 | Electromagnetic type micromechanic impress tester and method of testing thereof |
| CN101029815A (en) * | 2007-01-17 | 2007-09-05 | 黑龙江科技学院 | Solid stressed micro-deformation measuring device |
| CN201392295Y (en) * | 2009-03-03 | 2010-01-27 | 浙江吉利汽车研究院有限公司 | Passenger side safety gasbag rigidity testing device |
| CN101660988A (en) * | 2009-09-25 | 2010-03-03 | 上海大学 | Portable on-site Brinell hardness tester |
| CN101865646A (en) * | 2010-06-21 | 2010-10-20 | 宁波市产品质量监督检验研究院 | Heat deformation detection instrument |
| CN201964990U (en) * | 2011-01-17 | 2011-09-07 | 卓旦春 | Spring elasticity test device |
| CN102221501A (en) * | 2011-04-22 | 2011-10-19 | 河海大学 | Device and method for measuring mechanical properties of rocks |
| CN202033259U (en) * | 2011-01-21 | 2011-11-09 | 李竹生 | Device for testing hardness of cooked wheaten food |
| CN102507329A (en) * | 2011-11-11 | 2012-06-20 | 何若泉 | Rigidity detection device for escalator skirt panel |
| CN203025056U (en) * | 2012-12-31 | 2013-06-26 | 广东睡眠一百分床垫网股份有限公司 | User-defined type portable mattress hardness measurement instrument |
| CN203164056U (en) * | 2013-03-28 | 2013-08-28 | 昆明理工大学 | Experimental system for testing nut hull-breaking mechanical property |
| CN103424063A (en) * | 2013-08-19 | 2013-12-04 | 重庆长安汽车股份有限公司 | Non-metallic product stiffness measurement device |
| CN103913384A (en) * | 2013-01-08 | 2014-07-09 | 陕西汉江机床有限公司 | Axial rigidity measuring apparatus of ball screw assembly |
| CN104181039A (en) * | 2014-06-30 | 2014-12-03 | 山东省水利科学研究院 | Elastic modulus measuring method and device for flexible concrete with strength of 1-5MPa |
| CN104406859A (en) * | 2014-12-09 | 2015-03-11 | 中国包装科研测试中心 | Test method of creepage of paper box buffering material |
| CN204405279U (en) * | 2015-02-05 | 2015-06-17 | 中南大学 | Rail fastener vertical rigidity comprehensive measurement device |
| CN204882241U (en) * | 2015-07-29 | 2015-12-16 | 北京汽车研究总院有限公司 | Rigidity testing arrangement and system |
-
2015
- 2015-07-29 CN CN201510454336.XA patent/CN104964877B/en active Active
Patent Citations (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1501083A (en) * | 1973-12-22 | 1978-02-15 | Parry R | Testing of soils and like materials |
| US5209124A (en) * | 1989-09-02 | 1993-05-11 | H.F. & Ph.F. Reemtsma Gmbh & Co. | Method and apparatus for determining the filling capacity of tobacco and the hardness of cigarettes |
| JPH07225181A (en) * | 1994-02-14 | 1995-08-22 | Kawasaki Steel Corp | Method and apparatus for measurement of dent property of metal material |
| CN1395684A (en) * | 2000-01-19 | 2003-02-05 | 阿姆科尔有限公司 | Measuring apparatus and method for properties of board products |
| JP2002296159A (en) * | 2001-03-30 | 2002-10-09 | Matsumura Gumi Corp | Test apparatus for loading flat plate and recording medium |
| CN2638052Y (en) * | 2001-10-15 | 2004-09-01 | 东风汽车公司 | Sensor used for measuring hardness of covering material surface |
| CN1392400A (en) * | 2002-08-09 | 2003-01-22 | 中国建筑材料科学研究院 | Non-destructive testing method and device for mechanical property of brittle material |
| CN2713460Y (en) * | 2004-05-18 | 2005-07-27 | 柴东华 | Golf rigidity measurement instrument |
| CN1746653A (en) * | 2004-09-07 | 2006-03-15 | 中国科学院力学研究所 | Electromagnetic type micromechanic impress tester and method of testing thereof |
| CN101029815A (en) * | 2007-01-17 | 2007-09-05 | 黑龙江科技学院 | Solid stressed micro-deformation measuring device |
| CN201392295Y (en) * | 2009-03-03 | 2010-01-27 | 浙江吉利汽车研究院有限公司 | Passenger side safety gasbag rigidity testing device |
| CN101660988A (en) * | 2009-09-25 | 2010-03-03 | 上海大学 | Portable on-site Brinell hardness tester |
| CN101865646A (en) * | 2010-06-21 | 2010-10-20 | 宁波市产品质量监督检验研究院 | Heat deformation detection instrument |
| CN201964990U (en) * | 2011-01-17 | 2011-09-07 | 卓旦春 | Spring elasticity test device |
| CN202033259U (en) * | 2011-01-21 | 2011-11-09 | 李竹生 | Device for testing hardness of cooked wheaten food |
| CN102221501A (en) * | 2011-04-22 | 2011-10-19 | 河海大学 | Device and method for measuring mechanical properties of rocks |
| CN102507329A (en) * | 2011-11-11 | 2012-06-20 | 何若泉 | Rigidity detection device for escalator skirt panel |
| CN203025056U (en) * | 2012-12-31 | 2013-06-26 | 广东睡眠一百分床垫网股份有限公司 | User-defined type portable mattress hardness measurement instrument |
| CN103913384A (en) * | 2013-01-08 | 2014-07-09 | 陕西汉江机床有限公司 | Axial rigidity measuring apparatus of ball screw assembly |
| CN203164056U (en) * | 2013-03-28 | 2013-08-28 | 昆明理工大学 | Experimental system for testing nut hull-breaking mechanical property |
| CN103424063A (en) * | 2013-08-19 | 2013-12-04 | 重庆长安汽车股份有限公司 | Non-metallic product stiffness measurement device |
| CN104181039A (en) * | 2014-06-30 | 2014-12-03 | 山东省水利科学研究院 | Elastic modulus measuring method and device for flexible concrete with strength of 1-5MPa |
| CN104406859A (en) * | 2014-12-09 | 2015-03-11 | 中国包装科研测试中心 | Test method of creepage of paper box buffering material |
| CN204405279U (en) * | 2015-02-05 | 2015-06-17 | 中南大学 | Rail fastener vertical rigidity comprehensive measurement device |
| CN204882241U (en) * | 2015-07-29 | 2015-12-16 | 北京汽车研究总院有限公司 | Rigidity testing arrangement and system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651527A (en) * | 2016-03-02 | 2016-06-08 | 武汉信测标准技术服务有限公司 | Portable rigidity test bench |
| CN105651527B (en) * | 2016-03-02 | 2018-03-02 | 武汉信测标准技术服务有限公司 | Portable rigid testboard bay |
| CN107063598A (en) * | 2017-04-11 | 2017-08-18 | 北京航空航天大学 | A kind of labyrinth stiffness parameters automatic test platform |
| CN107219071A (en) * | 2017-07-10 | 2017-09-29 | 宁波赛福汽车制动有限公司 | Hydraulic motorcycle brake system rigidity test frock |
| CN113084812A (en) * | 2021-04-09 | 2021-07-09 | 吉林大学 | Method for evaluating rigidity performance of tail end of robot |
| CN113084812B (en) * | 2021-04-09 | 2022-06-21 | 吉林大学 | Method for evaluating rigidity performance of tail end of robot |
| CN113588418A (en) * | 2021-07-08 | 2021-11-02 | 一汽奔腾轿车有限公司 | Device and method for measuring surface rigidity of automobile body covering part |
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