CN104290772A - Shear force sensor - Google Patents
Shear force sensor Download PDFInfo
- Publication number
- CN104290772A CN104290772A CN201410554380.3A CN201410554380A CN104290772A CN 104290772 A CN104290772 A CN 104290772A CN 201410554380 A CN201410554380 A CN 201410554380A CN 104290772 A CN104290772 A CN 104290772A
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- CN
- China
- Prior art keywords
- force sensor
- shear force
- dynamometry
- gauge
- strain
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a shear force sensor comprising a force measuring supporting seat and a strain gage. The middle of the force measuring surface of the force measuring supporting seat is provided with a force measuring plate, force measuring sensing convex teeth are arranged on the force measuring surface surrounding the force measuring plate, and the strain gage is fixed to the force measuring plate in an adhered manner; by means of the force measuring sensing convex teeth, the shear force of the surface to be detected is conducted inwardly to the region of the force measuring plate, the strain gage deforms, and the value of the shear force of the surface to be detected is acquired. Thus, the problems that according to an existing shear force sensor, the implementation is difficult, and the measurement accuracy is low are solved.
Description
Technical field
The present invention relates to the detection technique field of track, be applied in the safety detection process of track, particularly relate to shear force sensor.
Background technology
In the construction of track and later stage use procedure, the strained condition of track is monitored, to reach, the running state of train and track structure state are monitored.Thus need to apply " shear force sensor " state to use track in the both sides of track and detect, existing " shear force sensor " mostly is " non-perforating type shear force sensor ", it in use, the both sides being installed on track to be detected need be pasted, symmetrical force-detecting position need press solidly in track both sides to be detected, but this kind of method of inspection, in implementation process, on the one hand, need to increase installing device by external auxiliary just can implement; In addition, this sensor utilizes top bolt to be squeezed on testee, the dynamometry of sensor is grabbed and is embedded into testee, because top bolt is spherical structure, and dynamometry to grab be the multiple independent double wedge of a circle, when Impact direction and center sensor axle is inconsistent or each double wedge size has a deviation time, dynamometry is easily caused to grab unbalance stress, impact test effect, therefore, survey precision is low, the accuracy of take off data declines, cannot ensure that continuous print effectively detects, thus, improve the safety of measuring cost and track use.
Summary of the invention
For above-mentioned defect of the prior art, the invention solves existing shear force sensor and implement the problem that difficulty is large, survey precision is low.
For this reason, the shear force sensor that the present invention proposes comprises, force measuring support seat and strain-gauge; The dynamometry Middle face of described force measuring support seat is indent force plate, and around described force plate, described dynamometry face is offered dynamometry induction double wedge, and described strain-gauge and described force plate are fixed; By described dynamometry induction double wedge, the shearing on surface to be detected is inwardly conducted to described force plate region, described strain-gauge is out of shape, obtain the shear value on current surface to be detected.
In a preferred embodiment, the outside of described force measuring support seat is support claw, and described support claw is along the radial distribution of described force plate.
In a preferred embodiment, the quantity of described support claw is 4,3,6 or 8.
In a preferred embodiment, described support claw offers installation through hole.
In a preferred embodiment, the convex shape of described dynamometry induction double wedge is triangle.
In a preferred embodiment, by around centered by described force plate, in many concentric annular distributions on described dynamometry face.
In a preferred embodiment, be strain-gauge installation cavity in the inner side of described force plate, described strain-gauge is arranged in described installation cavity, is fixedly connected with the inner side of described force plate.
In a preferred embodiment, described strain-gauge is along 45 ° or/135 ° of settings.
In a preferred embodiment, the vertical section of described installation cavity is circular.
In a preferred embodiment, also comprise, cable junction, the opening part of described installation cavity, offer the negative thread or outside thread that mate with described cable junction, described cable junction is fixed and described opening part.
Feature of the present invention and advantage are: by dynamometry pawl uniform around dynamometry side elevation, make dynamometry pawl when dynamometry, fixed area surface can be embedded, effectively prevent sensor in dynamometry process, because the dynamometry that center shaft is inconsistent or each double wedge size has deviation to cause grabs unbalance stress, the situation of impact test effect produces.This improves survey precision, reduce measurement cost.
Accompanying drawing explanation
Fig. 1 is in one embodiment of the present invention, the inner structure schematic diagram of shear force sensor;
In Fig. 2 Fig. 1, " A " to structural representation.
Detailed description of the invention
The feature of shear force sensor of the present invention, effect and the technical purpose that will reach are had and clearly and comprehensively understands, be described in further details below in conjunction with specification drawings and specific embodiments.
As shown in Figure 1, the shear force sensor in one embodiment of the present invention, comprises, and the side of metal force measuring support seat 10 is circular dynamometry face 11, the force plate 20 that the middle part in this dynamometry face 11 is formed in one or connects separately.On dynamometry face 11, offer many dynamometry induction double wedges 12 around force plate 20 region, this dynamometry induction double wedge 12 can be multiple concentric ring double wedge, or helix double wedge, and when for concentric ring double wedge, its concentric ring spacing is, 1 ~ 2mm; When for helix double wedge, its pitch is, 1 ~ 2mm.For ensureing good shearing force measurement precision, the thickness at above-mentioned force plate 20 place is preferably: 1 ~ 2mm.Strain-gauge 30 is fixed on force plate 20 by bonding, welding or the mode such as bolt connection, and for ensureing good survey precision, strain-gauge 30 is along 45 ° or/135 ° of settings in force plate 20 region.Strain-gauge measuring system or metering circuit 32 are connected with strain-gauge 30, by outside lead, take off data are outwards transmitted.Shear force sensor in the present invention in use, first by dynamometry induction double wedge 12 part in the dynamometry face 11 of force measuring support seat 10, to be fixed on to be detected surperficial 41 of rail 40 to be detected the part of broken line representation (in the figure), when there is sh ear deformation in the surface to be detected of rail 40 to be detected, dynamometry induction double wedge 12 is by surperficial 41 sh ear deformation produced to be detected, inwardly conduct in force plate 20 region, strain-gauge 30 is out of shape, by obtaining the current shear value of surperficial 41 to be detected to the reading of strain-gauge 30 data.For ensureing good measurement, make dynamometry respond to double wedge 12 more fixing and raceway surface to be detected, the hardness of above-mentioned dynamometry induction double wedge is HRC38-50.
In one embodiment of the present invention, for making shear force sensor better be fixed on surperficial 41 surfaces to be detected, as shown in Figure 2, in the outside of the dynamometry face 11 of force measuring support seat 10 around force plate 20, one-body molded or independent connection support claw 13.Support claw 13 is uniformly distributed along the radial direction of force plate 20, and its quantity can be the plural numbers such as 2,4 or 6,8, also according to measurement needs, can be set to the odd numbers such as 3 or 5.The quantity of the support claw 13 in diagram is 4, supports that pawl is along the radial direction 90 ° distribution of force plate 20 for 4.For ease of the installation in dynamometry face 11, and be more conducive to dynamometry induction double wedge 12, to the induction of the sh ear deformation of surperficial 41 to be detected, support claw 13 is offered diameter is: the installation through hole 14 of 12mm.Thus, by the fastener such as screw or bolt, through installing through hole 14, force measuring support seat 10 is installed on to be detected surperficial 41 of rail 40 to be detected.More sensitive in order to detect, when the good material of the wear-resisting tolerance such as material selection carbon steel of force measuring support seat 10, as: 40CrMoNiA, the convex shape of dynamometry induction double wedge 12 can be preferably triangle.
As shown in Figure 1, for making the shear force sensor in the present invention have globality, and avoiding external factor to the interference of strain-gauge when measuring, is in embodiment in one of the present invention, offer strain-gauge installation cavity 31 in the inner side of force plate 20, the vertical section of installation cavity 31 is circular.Strain-gauge 30 and strain-gauge measuring system or metering circuit 32, load from installation cavity 31, be arranged in installation cavity, be fixedly connected with the inner side of force plate 20.Meanwhile, for ease of sealing, be in embodiment in one of the present invention, the opening part of installation cavity 31, offers the negative thread or outside thread that mate with cable junction 33, thus external cable joint 33 is fixed and opening part.Thus realize effective sealing.
The above, be only specific embodiments of the invention, but can not limit scope of the invention process with this, and the equivalent variations namely generally done according to the present patent application the scope of the claims and description and modification, all should still remain within the scope of the patent.
Claims (10)
1. shear force sensor, is characterized in that, comprises, force measuring support seat and strain-gauge; The dynamometry Middle face of described force measuring support seat is indent force plate, and around described force plate, described dynamometry face is offered dynamometry induction double wedge, and described strain-gauge and described force plate are fixed; By described dynamometry induction double wedge, the shearing on surface to be detected is inwardly conducted to described force plate region, described strain-gauge is out of shape, obtain the shear value on current surface to be detected.
2. shear force sensor as claimed in claim 1, it is characterized in that, the outside of described force measuring support seat is support claw, and described support claw is along the radial distribution of described force plate.
3. shear force sensor as claimed in claim 2, it is characterized in that, the quantity of described support claw is 4,3,6 or 8.
4. shear force sensor as claimed in claim 2, is characterized in that, described support claw is offered installation through hole.
5. the shear force sensor as described in claim 1 or 4, is characterized in that, the convex shape of described dynamometry induction double wedge is triangle.
6. shear force sensor as claimed in claim 5, is characterized in that, described dynamometry induction double wedge, by around centered by described force plate, in many concentric annular distributions on described dynamometry face.
7. the shear force sensor as described in claim 5 or 6, is characterized in that, be strain-gauge installation cavity in the inner side of described force plate, described strain-gauge is arranged in described installation cavity, is fixedly connected with the inner side of described force plate.
8. shear force sensor as claimed in claim 7, it is characterized in that, described strain-gauge is along 45 ° or/135 ° of settings.
9. the shear force sensor as described in claim 6 or 8, is characterized in that, the vertical section of described installation cavity is circular.
10. shear force sensor as claimed in claim 9, is characterized in that, also comprise, cable junction, the opening part of described installation cavity, offer the negative thread or outside thread that mate with described cable junction, and described cable junction is fixed and described opening part.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410554380.3A CN104290772A (en) | 2014-10-17 | 2014-10-17 | Shear force sensor |
| CN201510624131.1A CN105172838A (en) | 2014-10-17 | 2015-09-25 | Punching-free type shear force sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410554380.3A CN104290772A (en) | 2014-10-17 | 2014-10-17 | Shear force sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104290772A true CN104290772A (en) | 2015-01-21 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410554380.3A Pending CN104290772A (en) | 2014-10-17 | 2014-10-17 | Shear force sensor |
| CN201510624131.1A Pending CN105172838A (en) | 2014-10-17 | 2015-09-25 | Punching-free type shear force sensor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510624131.1A Pending CN105172838A (en) | 2014-10-17 | 2015-09-25 | Punching-free type shear force sensor |
Country Status (1)
| Country | Link |
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| CN (2) | CN104290772A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020370B (en) * | 2017-12-29 | 2024-02-20 | 盘天(厦门)智能交通有限公司 | Combined type weighing platform paving structure |
| CN108020369A (en) * | 2017-12-29 | 2018-05-11 | 北京盘天新技术有限公司 | A kind of weighting platform and weighting platform paving structure |
| CN108132119A (en) * | 2017-12-29 | 2018-06-08 | 北京盘天新技术有限公司 | A kind of sensor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4914785B2 (en) * | 2006-08-31 | 2012-04-11 | 北海道旅客鉄道株式会社 | Vehicle running shake / noise analysis system, vehicle running shake / noise analysis method, and vehicle running noise analysis method |
| CN201107141Y (en) * | 2007-08-23 | 2008-08-27 | 罗绪荆 | Crisscross bridge type sensor |
| CN201311333Y (en) * | 2008-10-27 | 2009-09-16 | 杭州钱江称重技术有限公司 | Stress measurement sensor |
| CN102313589B (en) * | 2010-07-01 | 2013-07-24 | 顾增华 | Attached steel rail wheel weight sensor |
| CN204184376U (en) * | 2014-10-17 | 2015-03-04 | 中国铁道科学研究院铁道建筑研究所 | Shear force sensor |
-
2014
- 2014-10-17 CN CN201410554380.3A patent/CN104290772A/en active Pending
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2015
- 2015-09-25 CN CN201510624131.1A patent/CN105172838A/en active Pending
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| Publication number | Publication date |
|---|---|
| CN105172838A (en) | 2015-12-23 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150121 |