CN102261889A - Two-cantilever large-deformation strain measurement sensor - Google Patents
Two-cantilever large-deformation strain measurement sensor Download PDFInfo
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- CN102261889A CN102261889A CN2011100889337A CN201110088933A CN102261889A CN 102261889 A CN102261889 A CN 102261889A CN 2011100889337 A CN2011100889337 A CN 2011100889337A CN 201110088933 A CN201110088933 A CN 201110088933A CN 102261889 A CN102261889 A CN 102261889A
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Abstract
The invention relates to a two-cantilever large-deformation strain measurement sensor. A left end holder is provided with a left end connecting rod, a right end holder is provided with a right end connecting rod, the right end of the left end connecting rod is provided with a fixing body mounted at the left end in a sleeve, the left end of the right end connecting rod is provided with a wedge-shaped body mounted at the right end in the sleeve, the right end of the fixing body in the sleeve is provided with a spring leaf and a centering/spacing slide rod positioned in the spring leaf, the centering/spacing slide rod is externally provided with a compensating spring, the right end of the centering/spacing slide rod is arranged on the wedge-shaped body, the spring leaf is provided with even-numbered (at least four) resistance strain gages, and all the resistance strain gages form a full bridge which uses a lead wire for output. By using the W-shaped spring leaf, the invention greatly improves the sensitivity; and as both ends of the spring leaf are fixed, the two-cantilever large-deformation strain measurement sensor can still have high antijamming capability and stability even if the external loading force changes a lot. The two-cantilever large-deformation strain measurement sensor provided by the invention has the advantages of high sensitivity, easy calibration process, less linearity error, high antijamming capability, good stability and the like, and can be used as a large-deformation displacement sensor.
Description
Technical field
The invention belongs to the equipment technical field of measuring relative displacement, be specifically related to a kind of pair of cantilever large deformation displacement transducer.
Background technology
In the engineering field, the large deformation problem that often needs research material and structure, such as when the mechanical property of research engineering material, after the material production surrender, its relative deformation is all bigger, the measuring method that generally adopts is that the plastic strain sheet is directly sticked on the test specimen at present, owing to be subjected to technology for applying, foil gauge performance, paster performance and all multifactor impacts such as environment temperature and ambient humidity of glue, measurement effect is often very undesirable.In addition, when the mechanical property of research masonry structure, need to measure the distortion of building block, because the building block physical dimension difference that structure adopted, according to the masonry related specifications, to measure gauge length and generally from the centimetre-sized to the meter level, change, deflection is bigger, the at present main measuring method that adopts support and dial gauge or clock gauge combination, but this method is difficult on the works and surveys (as the stone arch bridge loading test).
The patent No. is 200320109969.X, denomination of invention is the Chinese patent of " two cantilever xoncrete structure strain measurement meter ", a kind of structural strain meter is disclosed, adopt an end and the strain transducer of strain bar to link, the other end and bearing link, the strain measurement meter of this structure, on-the-spot test through laboratory and bridge construction thing, it is highly sensitive to prove that it has, signal stabilization, advantage such as easy to use, but this strain measurement meter is because its reasons in structure, only energy measurement structure or the test specimen strain (small deformation) in elastic range can't measurement structure or the large deformation of test specimen.Therefore the development of large deformation strain transducer is the technical matters that the engineering strain technical field of measurement and test is badly in need of solution.
Summary of the invention
Technical matters to be solved by this invention is to overcome the shortcoming of above-mentioned pair of cantilever xoncrete structure strain measurement meter, provide a kind of reasonable in design, highly sensitive, be easy to demarcate, linear error is little, antijamming capability is strong, good stability, gauge length two cantilever large deformation strain gauge sensors adjustable, applied widely.
Solving the problems of the technologies described above the technical scheme that is adopted is: the left end bearing is provided with the left end connecting rod, the right-hand member bearing is provided with the right-hand member connecting rod, left end connecting rod right-hand member is provided with the fixed body that is installed in left end in the sleeve, the left end of right-hand member connecting rod is provided with the sphenoid that is installed in right-hand member in the sleeve, sleeve internal fixation body right-hand member is provided with spring leaf and is positioned at the spacing slide bar of centering of spring leaf, the spacing slide bar outer setting of centering has balancing spring, the right-hand member of the spacing slide bar of centering is arranged on the sphenoid, at least be provided with 4 even number resistance strain gages on the spring leaf, all resistance strain gages are formed full-bridge and are exported by lead.
Spring leaf of the present invention is: it be by spring leaf be bent into have upper flat plate, down dull and stereotyped and with the upper flat plate end and down dull and stereotyped end and flap be connected as a single entity and constitute W shape, be processed with rectangular through-hole a on the flap.The upper and lower surface of upper flat plate root at least respectively is provided with 1 sheet resistance foil gauge, the upper and lower surface of following dull and stereotyped root be provided with upper flat plate on the resistance strain gage of equal number, all resistance strain gages are formed full-bridges and are exported by lead.
Flap of the present invention is: with upper flat plate angle α be 20 °～70 ° the upper side plane plate and with down dull and stereotyped angle β be 20 °～70 ° the downside surface plate formation that is connected as a single entity, rectangular through-hole a is positioned on upper side plane plate and the downside surface plate.
Angle β between downside surface plate of the present invention and the following flat board and upper side plane plate equate with angle α between the upper flat plate.
Rectangular through-hole a of the present invention is positioned at the both sides of upper side plane plate and downside surface plate intersection, and symmetrical with intersection.
Upper flat plate of the present invention parallels with following flat board.
The thickness of spring leaf of the present invention is 0.2～1.0mm.
Angle between two wedge surfaces of sphenoid of the present invention is 10 °～60 °.
Be manufactured with graduated scale on left end connecting rod of the present invention and the right-hand member connecting rod.
The present invention has adopted W shape spring leaf, has improved sensitivity of the present invention greatly, and the two ends of spring leaf are fixed, and under load external force variation situation greatly, still has higher antijamming capability and stability.That the present invention has is reasonable in design, highly sensitive, be easy to demarcate, linear error is little, antijamming capability is strong, good stability, gauge length is adjustable, advantage such as applied widely, can be used as the displacement transducer of large deformation.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the be hit by a bullet deployed configuration synoptic diagram of reed 8 of Fig. 1.
Fig. 3 is Fig. 1 structural representation of reed 8 when the equilibrium position of being hit by a bullet.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the right view of Fig. 3.
Embodiment
The present invention is described in more detail with each embodiment below in conjunction with accompanying drawing, but the invention is not restricted to these embodiment.
In Fig. 1, two cantilever large deformation strain gauge sensors of present embodiment compress butterfly screw 3, fixed body 4, the spacing slide bar 5 of centering, resistance strain gage 6, balancing spring 7, spring leaf 8, sleeve 9, sphenoid 10, silicon rubber loop 11, right-hand member by left end connecting rod 1, left end bearing 2, left end and compress butterfly screw 12, right-hand member bearing 13, right-hand member connecting rod 14 and connect and constitute.
Compressing butterfly screw 3 with left end on left end bearing 2 is fixedly connected horizontally disposed left end connecting rod 1 is installed, be carved with graduated scale on the left end connecting rod 1, left end connecting rod 1 right-hand member has fixed body 4 by thread connection, the fixed body 4 of present embodiment is the boss shape structure, be installed with sleeve 9 at fixed body 4 left ends, be fixedly connected on the right-hand member boss of sleeve 9 internal fixation bodies 4 spring leaf 8 is installed, spring leaf 8 be shaped as W shape, the left end of spring leaf 8 sticks with glue on the upper surface and lower surface that is connected on fixed body 4 right-hand member boss, center at the right-hand member raised head face of fixed body 4 inwardly is processed with installing blind along its axis, the spacing slide bar 5 of centering is installed in the installing blind, the spacing slide bar 5 of centering is positioned at spring leaf 8, be set with balancing spring 7 on the spacing slide bar 5 of centering, right-hand member is installed with sphenoid 10 in the sleeve 9, angle between two wedge surfaces of sphenoid 10 is 30 °, between sphenoid 10 right-hand members and sleeve 9 inner tube walls silicon rubber loop 11 is installed, sphenoid 10 left ends are inserted into the right-hand member of spring leaf 8, center, sphenoid 10 left side inwardly is processed with installing blind along its axis, the right-hand member of the spacing slide bar 5 of centering is inserted in the installing blind of sphenoid 10, being enclosed within the spacing slide bar 5 outer balancing springs 7 of centering is arranged between fixed body 4 and the sphenoid 10, sphenoid 10 right-hand members have right-hand member connecting rod 14 by thread connection, right-hand member connecting rod 14 compresses butterfly screw 12 by right-hand member and is fixedly connected and is installed on the right-hand member bearing 13, be carved with graduated scale on the right-hand member connecting rod 14, left end connecting rod 1, fixed body 4, the spacing slide bar 5 of centering, sleeve 9, sphenoid 10, the axis of right-hand member connecting rod 14 coincides.
Fig. 2,3,4,5 has provided the structural representation of present embodiment spring leaf 8, in Fig. 1,2,3,4,5, the spring leaf 8 of present embodiment is formed by the rectangle spring leaf bending that the centre is processed with rectangular through-hole a, the thickness of spring leaf is 0.5mm, this rectangle spring leaf bending back form have upper flat plate 8-1, down dull and stereotyped 8-2 and with upper flat plate 8-1 end and down dull and stereotyped 8-2 end be connected as a single entity with flap and constitute W shape structure, upper flat plate 8-1 and following dull and stereotyped 8-2 are parallel to each other.The flap of present embodiment is connected as a single entity by upper side plane plate 8-3 and downside surface plate 8-4 and constitutes, and the angle α between upper side plane plate 8-3 and the upper flat plate 8-1 is 45 °, and the angle β between downside surface plate 8-4 and the following dull and stereotyped 8-2 is 45 °.Half of rectangular through-hole a is positioned at that upper side plane plate 8-3 goes up, second half is positioned on the downside surface plate 8-4, and rectangular through-hole a is symmetrical about the intersection of upper side plane plate 8-3 and downside surface plate 8-4, and the left end of sphenoid 10 is inserted in the rectangular through-hole a.The upper surface of upper flat plate 8-1 root and lower surface respectively are bonded with 1 sheet resistance foil gauge 6 symmetrically with glue, the upper surface and the lower surface of dull and stereotyped 8-2 root respectively are bonded with 1 sheet resistance foil gauge 6 symmetrically with glue down, to go up the quantity of resistance strain gage 6 identical with being bonded in down dull and stereotyped 8-2 to be bonded in quantity that upper flat plate 8-1 goes up resistance strain gage 6, and all resistance strain gages 6 composition full-bridges on upper flat plate 8-1 and the following dull and stereotyped 8-2 are exported by lead.
In an embodiment, the angle α between upper side plane plate 8-3 and the upper flat plate 8-1 is 20 °, and the angle β between downside surface plate 8-4 and the following dull and stereotyped 8-2 is 20 °, and rectangular through-hole a is identical with embodiment 1 with the position of downside surface plate 8-4 at upper side plane plate 8-3.The connecting relation of other parts and parts is identical with embodiment 1.
In an embodiment, the angle α between upper side plane plate 8-3 and the upper flat plate 8-1 is 70 °, and the angle β between downside surface plate 8-4 and the following dull and stereotyped 8-2 is 70 °, and rectangular through-hole a is identical with embodiment 1 with the position of downside surface plate 8-4 at upper side plane plate 8-3.The connecting relation of other parts and parts is identical with embodiment 1.
Embodiment 4
In above embodiment 1～3, upper surface and lower surface at the upper flat plate 8-1 of spring leaf 8 root respectively are bonded with 2 sheet resistance foil gauges 6 symmetrically with glue, the upper surface of the following dull and stereotyped 8-2 root of spring leaf 8 and lower surface respectively are bonded with 2 sheet resistance foil gauges 6 with glue, all resistance strain gages 6 composition full-bridges on upper flat plate 8-1 and the following dull and stereotyped 8-2 are exported by lead, and other structure of spring leaf 8 is identical with embodiment 1.The connecting relation of other parts and parts is identical with embodiment 1.
Embodiment 5
In above embodiment 1～3, upper surface and lower surface at the upper flat plate 8-1 of spring leaf 8 root respectively are bonded with 4 sheet resistance foil gauges 6 with glue, upper surface and lower surface at the following dull and stereotyped 8-2 root of spring leaf 8 respectively are bonded with 4 sheet resistance foil gauges 6 with glue, all resistance strain gages 6 composition full-bridges on upper flat plate 8-1 and the following dull and stereotyped 8-2 are exported by lead, and other structure of spring leaf 8 is identical with embodiment 1.The connecting relation of other parts and parts is identical with embodiment 1.
Embodiment 6
In above embodiment 1～5, spring leaf 8 is made of the rectangle spring leaf bending that the centre is processed with rectangular through-hole a, the thickness of spring leaf is 0.2mm, angle α between upper side plane plate 8-3 and the upper flat plate 8-1, downside surface plate 8-4 is with angle β and the respective embodiments between the dull and stereotyped 8-2 is identical down, and the connecting relation of other parts and parts is identical with embodiment 1.
In above embodiment 1～5, the thickness of spring leaf is 1.0mm, angle α between upper side plane plate 8-3 and the upper flat plate 8-1, downside surface plate 8-4 is with angle β and the respective embodiments between the dull and stereotyped 8-2 is identical down, and the connecting relation of other parts and parts is identical with embodiment 1.
In above embodiment 1～7, right-hand member is installed with sphenoid 10 in the sleeve 9, and the angle between two wedge surfaces of sphenoid 10 is 10 °, and sphenoid 10 left ends are inserted in the rectangular through-hole a of spring leaf 8 flaps.The connecting relation of other parts and parts is identical with respective embodiments.
In above embodiment 1～7, right-hand member is installed with sphenoid 10 in the sleeve 9, and the angle between two wedge surfaces of sphenoid 10 is 60 °, and sphenoid 10 left ends are inserted in the rectangular through-hole a of spring leaf 8 flaps.The connecting relation of other parts and parts is identical with respective embodiments.
Claims (9)
1. two cantilever large deformation strain gauge sensors, it is characterized in that: left end bearing (2) is provided with left end connecting rod (1), right-hand member bearing (13) is provided with right-hand member connecting rod (14), left end connecting rod (1) right-hand member is provided with the fixed body (4) that is installed in the interior left end of sleeve (9), the left end of right-hand member connecting rod (14) is provided with the sphenoid (10) that is installed in the interior right-hand member of sleeve (9), sleeve (9) internal fixation body (4) right-hand member is provided with spring leaf (8) and is positioned at the spacing slide bar of centering (5) of spring leaf (8), the spacing slide bar of centering (5) outer setting has balancing spring (7), the right-hand member of the spacing slide bar of centering (5) is arranged on the sphenoid (10), at least be provided with 4 even number resistance strain gages (6) on the spring leaf (8), all resistance strain gages (6) are formed full-bridge and are exported by lead.
2. according to described pair of cantilever large deformation of claim 1 strain gauge sensors, it is characterized in that said spring leaf (8) is: it is to be bent into have upper flat plate (8-1), down dull and stereotyped (8-2) and with upper flat plate (8-1) end and down dull and stereotyped (8-2) end and the flap formation W shape that is connected as a single entity by spring leaf, is processed with rectangular through-hole (a) on the flap; The upper and lower surface of upper flat plate (8-1) root at least respectively is provided with 1 sheet resistance foil gauge (6), the upper and lower surface of following dull and stereotyped (8-2) root is provided with the resistance strain gage (6) of going up equal number with upper flat plate (8-1), and all resistance strain gages (6) are formed full-bridge and exported by lead.
3. according to described pair of cantilever large deformation of claim 2 strain gauge sensors, it is characterized in that said flap is: with upper flat plate (8-1) angle (α) be 20 °～70 ° upper side plane plate (8-3) and with the following angle (β) of dull and stereotyped (8-2) be 20 °～70 ° downside surface plate (8-4) formation that is connected as a single entity, rectangular through-hole (a) is positioned on upper side plane plate (8-3) and the downside surface plate (8-4).
4. according to described pair of cantilever large deformation of claim 3 strain gauge sensors, it is characterized in that: said downside surface plate (8-4) and down angle (β) between dull and stereotyped (8-2) and upper side plane plate (8-3) equate with angle (α) between the upper flat plate (8-1).
5. according to claim 2 or 3 described pairs of cantilever large deformation strain gauge sensors, it is characterized in that: said rectangular through-hole (a) is positioned at the both sides of upper side plane plate (8-3) and downside surface plate (8-4) intersection, and symmetrical with intersection.
6. according to claim 2 or 3 or 4 described pairs of cantilever large deformation strain gauge sensors, it is characterized in that: said upper flat plate (8-1) parallels with down dull and stereotyped (8-2).
7. according to described pair of cantilever large deformation of claim 2 strain gauge sensors, it is characterized in that: the thickness of said spring leaf (8) is 0.2～1.0mm.
8. according to described pair of cantilever large deformation of claim 1 strain gauge sensors, it is characterized in that: the angle between two wedge surfaces of said sphenoid (10) is 10 °～60 °.
9. according to described pair of cantilever large deformation of claim 1 strain gauge sensors, it is characterized in that: be manufactured with graduated scale on said left end connecting rod (1) and the right-hand member connecting rod (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110088933 CN102261889B (en) | 2011-04-08 | 2011-04-08 | Two-cantilever large-deformation strain measurement sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110088933 CN102261889B (en) | 2011-04-08 | 2011-04-08 | Two-cantilever large-deformation strain measurement sensor |
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| CN102261889A true CN102261889A (en) | 2011-11-30 |
| CN102261889B CN102261889B (en) | 2013-09-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604360A (en) * | 2013-11-14 | 2014-02-26 | 中国矿业大学 | Cantilever differential type ground crack displacement testing instrument |
| CN104359392A (en) * | 2014-11-10 | 2015-02-18 | 中国船舶重工集团公司第七○二研究所 | Pull rod type underwater structure deformation measuring device |
| CN107063072A (en) * | 2017-05-09 | 2017-08-18 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Plant equipment contact surface opening displacement measurement apparatus and its measuring method |
| CN108151689A (en) * | 2017-11-20 | 2018-06-12 | 中国建筑股份有限公司 | High accuracy displacement sensor |
| CN109060520A (en) * | 2018-06-26 | 2018-12-21 | 沈阳理工大学 | Micro- folding cantilever beam of special device for testing stiffness and test method |
| CN109883308A (en) * | 2019-04-19 | 2019-06-14 | 西安桥邦智能科技有限公司 | Assembling multipurpose strain gauge sensors |
| CN111486878A (en) * | 2020-05-08 | 2020-08-04 | 长春晟博光学技术开发有限公司 | Integrated magnetic grid ruler encoder with limiting function |
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| DE3231777A1 (en) * | 1982-08-26 | 1984-03-01 | Continental Gummi-Werke Ag, 3000 Hannover | Device for determining changes in length |
| DE4228307A1 (en) * | 1992-08-26 | 1994-03-03 | Rexroth Mannesmann Gmbh | Proportional magnetic valve for hydraulic appts. e.g. regulating valve, pump or positioning motor - has strain gauge on leaf spring, one end of which is connected to housing, and other end of which is deflected according to position of control piston |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604360A (en) * | 2013-11-14 | 2014-02-26 | 中国矿业大学 | Cantilever differential type ground crack displacement testing instrument |
| CN104359392A (en) * | 2014-11-10 | 2015-02-18 | 中国船舶重工集团公司第七○二研究所 | Pull rod type underwater structure deformation measuring device |
| CN104359392B (en) * | 2014-11-10 | 2016-10-26 | 中国船舶重工集团公司第七○二研究所 | Rod-pulling type submerged structure deformation measuring device |
| CN107063072A (en) * | 2017-05-09 | 2017-08-18 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Plant equipment contact surface opening displacement measurement apparatus and its measuring method |
| CN108151689A (en) * | 2017-11-20 | 2018-06-12 | 中国建筑股份有限公司 | High accuracy displacement sensor |
| CN109060520A (en) * | 2018-06-26 | 2018-12-21 | 沈阳理工大学 | Micro- folding cantilever beam of special device for testing stiffness and test method |
| CN109060520B (en) * | 2018-06-26 | 2020-10-27 | 沈阳理工大学 | Device and method for testing rigidity of micro-folding cantilever beam |
| CN109883308A (en) * | 2019-04-19 | 2019-06-14 | 西安桥邦智能科技有限公司 | Assembling multipurpose strain gauge sensors |
| CN111486878A (en) * | 2020-05-08 | 2020-08-04 | 长春晟博光学技术开发有限公司 | Integrated magnetic grid ruler encoder with limiting function |
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