CN1760662A - 2D force transducer in small measurement range - Google Patents
2D force transducer in small measurement range Download PDFInfo
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- CN1760662A CN1760662A CN 200510094990 CN200510094990A CN1760662A CN 1760662 A CN1760662 A CN 1760662A CN 200510094990 CN200510094990 CN 200510094990 CN 200510094990 A CN200510094990 A CN 200510094990A CN 1760662 A CN1760662 A CN 1760662A
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- elastic body
- protective cover
- cantilever
- measurement range
- foil gauge
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Abstract
The invention belongs to technique for measuring force. Three consecutive intersectant through holes of two groups are made on elastic body. Left and right strain gauges, and upper and down strain gauges are stuck on two outer surfaces (largest strain occurs) of the said through holes of two groups in elastic body so as to constitute Wheatstone half bridge. One fixed end of protection cover is fit to the fixed end of the elastic body tightly, and the other end is fit to a spacing ring tightly. Cantilever of the elastic body passes through square hole of the spacing ring. Being extended to the square hole on the base seat, the fixed end of the protection cover is pressed on inner sidewall of the square hole by pad through holding screw. There are eight through holes on the base seat. Sensors are fixed on worktable. Features are: simple structure, high rigidity, safety and reliability. The transducer is applicable to biomimetic viscous material.
Description
One, technical field
2 D force transducer in small measurement range of the present invention belongs to the mechanical test technology, is used for the Mechanics Performance Testing of bionical cohesive material, also can be used for general friction testing.
Two, background technology
In the bionical cohesive material that carries out gecko, honeybee sole (as polyurethane etc.) research process, we need carry out the test of three kinds of functions to material: the clinging power test of single vertical direction, the friction testing of single horizontal direction and the test of clinging power in the two dimensional motion and friction force.So just need a kind of special-purpose 2 D force sensor that can measure horizontal direction and vertical forces simultaneously of development.
The at present known 2 D force sensor that is used for friction test is a kind of to be combined sensor, as document " 2 D force sensor that is used for the friction factor test " [Shi Yan, diesel locomotive, 2002,336 (2): 41-43], this sensor construction complexity is installed inconvenience, and only is applicable to relatively large journey force measurement.Another kind of " two-dimensional micro-force measuring sensors " as Chinese patent publication number 200510023641.x, adopt the elastic body cantilever design, form by orthogonal vertical bent beam and horizontal bent beam, post foil gauge respectively on two groups of beams, respectively the power of measuring vertical and horizontal direction.This sensor can carry out the little friction testing of the multiple way of contact, and guarantees measuring accuracy and resolution, and its shortcoming is that the elastic body integral rigidity is little, easy deformation; Natural frequency is low, is unfavorable for dynamic test; There is not overcurrent protection structure; The people such as Li Haiwen of Changchun research institute of the Chinese Academy of Sciences in 2004 are at " research of little friction testing instrument force transducer " [precision engineering, in August, 2002, the 10th the volume fourth phase] in a kind of novel silicon Micro-force sensor has been proposed, sensor elastomer is designed to have the silicon beam of semi-girder film and foil gauge resistance, the sensitivity of this sensor is 65V/N, resolution is 46 little oxen, and resultnat accuracy is 2.3%.This sensor construction adopts micromechanical process, and processing is complicated, though measuring resolution and precision are all higher, measurement range is little.Above-mentioned like this sensor all is discontented with the unabridged version experimental requirements at aspects such as structure, rigidity, dynamometry scopes.
Three, summary of the invention
The present invention is based on above-mentioned technical background, proposed a kind of a small amount of journey dimension sensor that is used for bionical cohesive material, simultaneously the power of measuring vertical direction and horizontal direction.
A small amount of journey 2 D force sensor of the present invention mainly comprises elastic body, protection stop means, three parts of clamping and fixing device.Elastic body adopts the parallel girder structure; comprise the elastic body cantilever; the elastic body stiff end that links to each other with the elastic body cantilevered distal end; elastic body cantilever front end has the through hole that is used to install sample; before the stress raiser of elastic body cantilever has dug; back and last; following two groups of cross one another through holes; preceding; the back one group of through hole outer surface paste respectively a pair of before; back foil gauge; last; next the group through hole outer surface paste respectively a pair of on; following foil gauge; two pairs of foil gauges are formed two groups of half-bridge circuits respectively; be respectively applied for the power of the vertical and horizontal both direction of side amount; the elastic body cantilever passes to be contained in the spacing ring intermediate throughholes in the protective cover front end and to place in the protective cover and protects; link to each other with the elastic body stiff end stiff end of two protective cover rear ends of protective cover rear end is fixed in the pedestal, and pedestal is fixed on 2 D force transducer in small measurement range on the worktable.
2 D force transducer in small measurement range of the present invention is simple in structure, and is easy for installation, and elastic body integral rigidity height has overcurrent protection structure, and is safe to use.Sensor method is 0 ~ 400g to the strength journey, and resolution is 1g; The tangential force range is 0 ~ 500g, and resolution is 1g, satisfies this testing requirements.
Four, description of drawings
Fig. 1 is the elastomer structure synoptic diagram of 2 D force transducer in small measurement range.
Fig. 2 is the assembling synoptic diagram of 2 D force transducer in small measurement range.
Fig. 3 is the pedestal synoptic diagram.
The label title of Fig. 1: 1. elastic body front end through hole, 2. forward and backward foil gauge, 3. upper and lower foil gauge, 4. elastic body stiff end 5. elastic body cantilevers.
The label title of Fig. 2: 6. spacing ring, 7. protective cover is 8. marked closely screw, sample on 12..
The label title of Fig. 3: 9. pedestal through hole, 10. pedestal, 11. pads.
Five, embodiment
Below in conjunction with accompanying drawing and example the present invention is described further:
Two dimension of the present invention journey sensor elastomer in a small amount adopts the parallel girder structure, utilizes stress principle of centrality borehole on beam, increases elastomeric integral rigidity.As Fig. 1,2, elastic body front end through hole 1 is used for and last sample 12 clampings.Outside the forward and backward hole at elastic body cantilever 5 borehole places, survey two pairs of foil gauges that surface and upper and lower hole outer surface post forward and backward a pair of foil gauge 2 and upper and lower a pair of foil gauge 3 respectively, 3, two pairs of foil gauges of upper and lower foil gauge of the forward and backward foil gauge 2 of horizontal force test usefulness and vertical force test usefulness are formed two groups of half-bridge circuits.Utilize the stress principle of centrality, stress maximum at the elastic body cantilever digs forward and backward and upper and lower two groups of through holes that intersect, and paste forward and backward and upper and lower two pairs of foil gauges respectively at the through hole outer surface, under the prerequisite that guarantees elastic body rigidity, can obtain bigger measuring accuracy and resolution.Elastic body stiff end 4 and protective cover 7 one ends closely cooperate, and the spacing ring 6 and protective cover 7 other ends closely cooperate, and elastic body cantilever 5 passes the square hole in the middle of the spacing ring 6.Fixing in the rectangular opening that an end stretches into pedestal 10 of protective cover 7, holding screw 8 is fixed on protective cover 7 extruding on the pedestal 10 by pad 11.Be drilled with five through holes 9 on the pedestal 10, sensor be fixed on the worktable by being threaded.
When carrying out test experiments, after last sample 12 is subjected to vertical force Fn effect, cause the flexural deformation of elastic body vertical direction, the last foil gauge of upper and lower foil gauge 3 is subjected to tension ε, following foil gauge compression chord-ε, be enlarged into 2 ε through the half-bridge circuit strain, two foil gauge strain values of forward and backward foil gauge 2 are identical simultaneously, are output as 0 through the half-bridge circuit strain.Promptly when last sample 12 is subjected to vertical force Fn, only there is upper and lower foil gauge 4 that strain signal output is arranged.The same last sample 12 of working as is subjected to tangential force Ft to do the time spent, only has left and right sides foil gauge 3 that strain signal output is arranged.
The gap is left on the surface of square hole in the spacing ring 6 and elastic body cantilever 5; the size in gap elastomeric maximum displacement when applying full scale load; when the load no to scale, spacing ring stops the diastrophic continuation of elastic body to increase, thereby has protected elastic body and foil gauge.
Claims (1)
1; a kind of 2 D force transducer in small measurement range; comprise elastic body; the protection stop means; clamping and fixing device three parts; it is characterized in that: elastic body comprises elastic body cantilever (5); with the terminal elastic body stiff end (4) that links to each other of elastic body cantilever (5); elastic body cantilever (5) front end has the through hole (1) that is used to install sample (12); before the stress raiser of elastic body cantilever (5) has dug; back and last; the through hole of following two sets intersect; before; before a pair of foil gauge in back (2) sticks on respectively; the one group of through hole outer surface in back; on; next sticks on respectively foil gauge (3); next group through hole outer surface; two pairs of foil gauges are formed two groups of Hui Sideng half-bridge circuits respectively; be respectively applied for measuring vertical and horizontal both direction power; elastic body cantilever (5) passes spacing ring (6) intermediate throughholes that is contained in protective cover (7) front end and places in the protective cover (7); protective cover (7) rear end links to each other with elastic body stiff end (4); the stiff end of protective cover (7) rear end is fixed in the pedestal (10), and pedestal (10) is fixed on 2 D force transducer in small measurement range on the worktable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510094990 CN1760662A (en) | 2005-10-25 | 2005-10-25 | 2D force transducer in small measurement range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510094990 CN1760662A (en) | 2005-10-25 | 2005-10-25 | 2D force transducer in small measurement range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1760662A true CN1760662A (en) | 2006-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200510094990 Pending CN1760662A (en) | 2005-10-25 | 2005-10-25 | 2D force transducer in small measurement range |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393265A (en) * | 2011-11-09 | 2012-03-28 | 中国航天员科研训练中心 | Resistance strain force sensor |
| CN102778310A (en) * | 2012-07-12 | 2012-11-14 | 南京航空航天大学 | Force transducer capable of calibrating multiple angles |
| CN106393178A (en) * | 2016-09-19 | 2017-02-15 | 江南大学 | Two-dimensional clamping force sensor |
| CN106644259A (en) * | 2016-12-26 | 2017-05-10 | 哈尔滨工业大学 | Posture influenced compensation method for cantilever beam type sensor |
| CN108872064A (en) * | 2018-04-26 | 2018-11-23 | 深圳大学 | A kind of writing implement friction testing device and its test method |
| CN112692830A (en) * | 2020-12-22 | 2021-04-23 | 浙江理工大学 | Three-dimensional angular displacement six-degree-of-freedom sensor system, measuring method and manipulator |
| CN112834091A (en) * | 2020-12-31 | 2021-05-25 | 苏州大学 | Micro-force sensor for micro-assembly and piezoelectric ceramic driving micro-gripper |
-
2005
- 2005-10-25 CN CN 200510094990 patent/CN1760662A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393265A (en) * | 2011-11-09 | 2012-03-28 | 中国航天员科研训练中心 | Resistance strain force sensor |
| CN102393265B (en) * | 2011-11-09 | 2014-08-20 | 中国航天员科研训练中心 | Resistance strain force sensor |
| CN102778310A (en) * | 2012-07-12 | 2012-11-14 | 南京航空航天大学 | Force transducer capable of calibrating multiple angles |
| CN106393178A (en) * | 2016-09-19 | 2017-02-15 | 江南大学 | Two-dimensional clamping force sensor |
| CN106393178B (en) * | 2016-09-19 | 2019-05-17 | 江南大学 | A kind of two dimension clamping force snesor |
| CN106644259A (en) * | 2016-12-26 | 2017-05-10 | 哈尔滨工业大学 | Posture influenced compensation method for cantilever beam type sensor |
| CN108872064A (en) * | 2018-04-26 | 2018-11-23 | 深圳大学 | A kind of writing implement friction testing device and its test method |
| WO2019205331A1 (en) * | 2018-04-26 | 2019-10-31 | 深圳大学 | Writing implement friction testing apparatus and testing method thereof |
| CN108872064B (en) * | 2018-04-26 | 2021-01-12 | 深圳大学 | Writing tool friction force testing device and testing method thereof |
| CN112692830A (en) * | 2020-12-22 | 2021-04-23 | 浙江理工大学 | Three-dimensional angular displacement six-degree-of-freedom sensor system, measuring method and manipulator |
| CN112834091A (en) * | 2020-12-31 | 2021-05-25 | 苏州大学 | Micro-force sensor for micro-assembly and piezoelectric ceramic driving micro-gripper |
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