CN109374162A - A kind of strain sensitive core for force snesor - Google Patents
A kind of strain sensitive core for force snesor Download PDFInfo
- Publication number
- CN109374162A CN109374162A CN201811579704.3A CN201811579704A CN109374162A CN 109374162 A CN109374162 A CN 109374162A CN 201811579704 A CN201811579704 A CN 201811579704A CN 109374162 A CN109374162 A CN 109374162A
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- web
- strain sensitive
- strain
- sensitive core
- edge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2287—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges constructional details of the strain gauges
Abstract
The invention discloses a kind of strain sensitive cores for force snesor.For making force snesor, the strain sensitive core includes: web and is integrally machined the molding edge of a wing with the web strain sensitive core；The web and the edge of a wing are plate structure；The edge of a wing is located at the top of the web；The web and the edge of a wing are vertical, and the cross section of the strain sensitive core is T-shaped；The web bottom has open pore.The edge of a wing and the web constitute T-type structure, and open pore is set in the web bottom, it will be converted to bending strain along the axial compressive strain of tested external force direction, so that the original strain more intracorporal than elasticity of measurement strain value is much bigger, improves the sensitivity of stress measurement.And strain sensitive cored structure provided by the invention is simple, compact, is had the characteristics that using force snesor prepared by the strain sensitive core small in size, light-weight.
Description
Technical field
The present invention relates to mechanical meaurement technical fields, more particularly to a kind of strain sensitive core for force snesor.
Background technique
General force snesor measures the sensor of pulling force or pressure (not being pressure) especially in order to guarantee measurement accuracy,
Measured external force will act on the relatively small region of sensor.If allowing measured external force in relatively large face
Certain structure is added in product, by effective elastomer far from acting surface, just can guarantee the stress of elastomer as far as possible in this way
It is not influenced by the variation of surveyed external force point；Or sensor is done along the size in direction puted forth effort it is long, it is otherwise difficult
To guarantee measurement accuracy.This have the consequence that enabling the volume of sensor become larger, so that it cannot meet actual needs.
Summary of the invention
The object of the present invention is to provide a kind of strain sensitive cores for force snesor, to reduce the volume of force snesor simultaneously
Improve measurement accuracy.
To achieve the above object, the present invention provides following schemes:
A kind of strain sensitive core for force snesor, the strain sensitive core is for making force snesor, the strain
Sensitive core includes: web and is integrally machined the molding edge of a wing with the web；The web and the edge of a wing are plate structure；Institute
The edge of a wing is stated to be located at the top of the web；The web and the edge of a wing are vertical, and the cross section of the strain sensitive core is T-shaped；Institute
Web bottom is stated with open pore.
Optionally, the strain sensitive core is metal elastomer.
Optionally, the open pore is oblong or round rectangle.
Optionally, the open pore is semicircle or ellipse.
Optionally, the edge on the edge of a wing has groove.
Optionally, the strain sensitive core long 10~80mm, high 5~15mm.
Optionally, resistance strain gage is pasted in the open pore.
The specific embodiment provided according to the present invention, the invention discloses following technical effects:
The present invention provides a kind of strain sensitive core for force snesor, and the strain sensitive core is for making power sensing
Device, the strain sensitive core include: web and are integrally machined the molding edge of a wing with the web；The web and the edge of a wing are
Plate structure；The edge of a wing is located at the top of the web；The web and the edge of a wing are vertical, the strain sensitive core it is transversal
Face is T-shaped；The web bottom has open pore.The edge of a wing and the web constitute T-type structure, and at the web bottom
Open pore is arranged in portion, will be converted to bending strain along the axial compressive strain of tested external force direction, so that measurement strain value compares bullet
Property it is intracorporal it is original strain it is much bigger, improve the sensitivity of stress measurement.And strain sensitive cored structure provided by the invention
Simply, compact, had the characteristics that using force snesor prepared by the strain sensitive core small in size, light-weight.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also mention according to the present invention
The attached drawing of confession obtains other attached drawings.
Fig. 1 is the structural schematic diagram of strain sensitive core embodiment one provided by the invention；
Fig. 2 is the structural schematic diagram of strain sensitive core embodiment two provided by the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is provided by the invention using several the object of the present invention is to provide a kind of strain sensitive core for force snesor
The strain sensitive core can make compressive load (be pressure be not pressure) sensor of large access area, and sensor is installed on greatly
In type equipment, detection acts on pressure suffered on the limited areal of privileged sites, can reduce the volume of force snesor and mention
High pressure measurement accuracy.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the structural schematic diagram of strain sensitive core embodiment one provided by the invention.Fig. 2 is strain provided by the invention
The structural schematic diagram of sensitive core embodiment two.Referring to Fig. 1 and Fig. 2, this object of the present invention is to provide a kind of strain sensitive core
Sensitive core itself is not used separately as force snesor, but is used cooperatively with the exterior elastomer of specific shape (groove body),
Strain sensitive core is embedded in exterior elastomer, by welding, is struck up partnership with exterior elastomer.When exterior elastomer deforms
When, strain sensitive core deforms simultaneously, goes out to strain by the strain gage testing being attached in sensitive core and exterior elastomer, this is answered
Become the size for reflecting external force suffered by surface of elastomer, the direction of measured external force F is as illustrated by the arrows in fig. 1.External force F in Fig. 1
It is only a kind of signal, actually external force is on the entire upper surface of strain sensitive core.
The strain sensitive core provided by the invention is for making force snesor, and the basic structure of the strain sensitive core is such as
It shown in Fig. 1 or Fig. 2, is made of mutually perpendicular two parts plate structure edge of a wing 1 and web 2, this two parts plate structure is one
It is whole, it is processed into same metal elastomer.The common material of metal elastomer has chromium nickel-molybdenum alloy, and chromium manganese silicon closes
Gold or alloy aluminum, but it is not limited to these types of alloy, as long as using the material that elasticity is good, intensity is high.The elastomer
Effect is the strain experiencing tested external force and generating in itself, is the critical component of force snesor.
The web 2 is the ontology of the strain sensitive core, and the effect on the edge of a wing 1 is affixed with external elastomer.
The open pore of oblong (as shown in Figure 1) or round rectangle (as shown in Figure 2), but the open pore are machined on the web 2
Both shapes are not limited to, various types of holes such as semicircle, ellipse are also possible to.The effect of the open pore is,
When sensitive core is by external force, especially by the external force perpendicular to the edge of a wing 1 when, certain local stress in hole are remote
Stress when greater than non-aperture can be such that the strain sensitivity of sensitive core greatly improves in these position adhering resistance strain sheets.It opens
The purpose in the hole of diversified forms is to be suitable for different elastomer and stress.
Closure body is played the role of on the edge of a wing 1 on 2 top of web, and there is groove at the edge on the edge of a wing 1, is used for and outer
The welding of portion's elastomer.Argon arc welding must be used when welding, be confined to high temperature near weld bond, will not be made the electricity on sensitive core ontology
Resistance foil gauge is destroyed because of high temperature.
The size of the strain sensitive core is depending on application conditions.It is generally preferred to grow in 10~80mm, high 5~15mm is left
The right side is certainly not limited to this range.
In practical applications, resistance strain gage is pasted in the open pore.As depicted in figs. 1 and 2, the opening hole edge
Edge posts resistance strain gage R1, R2, R3, R4.The position that resistance strain gage R2, R4 paste is opposite by position is pasted with R1, R3
Stress, in this way convenient for composition electric bridge.
As a preferred embodiment, the strain sensitive core provided by the invention is for making a kind of measurement effect
Force snesor on relatively large area.For example, tunneling boring hard rock mole (TBM), by hobboing cutter broken rock, hobboing cutter passes through C-shaped
Block and voussoir are fixed on cutterhead, and the plane of voussoir is pressed on cutter shaft side plane and is allowed to fixed, and the power of two interplanars transmitting is maximum
Up to 30 tons, area is relatively large.Such as to measure this stress, it is necessary to which application uses strain sensitive core system provided by the invention
Standby force snesor.
In a kind of force snesor for the big active area for preparing rectangular elastomer using strain sensitive core provided by the invention
When, select the upper surface of strain sensitive core shown in fig. 1 or fig. 2 for the acting surface of institute's dynamometry.It is glued on the strain sensitive core
Four sheet resistance foil gauges are pasted, as shown in figure R1, R2, R3, R4.By this four sheet resistances foil gauge and it is pasted onto exterior elastomer
Foil gauge together, collectively constitutes full-bridge circuit, then web 2 is inserted into groove body made of exterior elastomer, using argon arc welding
Technology welds the surface on the edge of a wing 1 and exterior elastomer, and the force snesor is made.Wherein the groove depth of the exterior elastomer is big
In the height of strain sensitive core web 2.The lead of the force snesor can draw from the seam of exterior elastomer with 2 bottom of web
Out.
The force snesor prepared using strain sensitive core provided by the invention can excavate the stress shape of hobboing cutter with real-time measurement
State, the hair of the perils such as huge economic losses and personal injury caused by effectively reducing or avoid because of cutter accidental shutdown
It is raw.Due to can grasp in time construction in cutterhead, cutter operating condition, can effective guarantee guarantee driving reliability.Simultaneously
Also the peace service life of shield machine is extended.
One kind provided by the invention can be embedded in the strain sensitive core inside exterior elastomer, can measure in elastomer
The strain in portion is much larger than elastomer itself to the susceptibility of strain.The body construction of the strain sensitive core be machined with it is oval
The web in shape hole or round rectangle hole can will be converted into bending strain along the axial compressive strain of tested external force direction, so that surveying
It is much bigger to measure strain value original strain more intracorporal than elasticity, improves sensitivity.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand the device of the invention and its core concept；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (7)
1. a kind of strain sensitive core for force snesor, which is characterized in that the strain sensitive core is used to make force snesor,
The strain sensitive core includes: web and is integrally machined the molding edge of a wing with the web；The web and the edge of a wing are plate
Shape structure；The edge of a wing is located at the top of the web；The web and the edge of a wing are vertical, the cross section of the strain sensitive core
It is T-shaped；The web bottom has open pore.
2. strain sensitive core according to claim 1, which is characterized in that the strain sensitive core is metal elastomer.
3. strain sensitive core according to claim 1, which is characterized in that the open pore is oblong or round rectangle.
4. strain sensitive core according to claim 1, which is characterized in that the open pore is semicircle or ellipse.
5. strain sensitive core according to claim 1, which is characterized in that the edge on the edge of a wing has groove.
6. strain sensitive core according to claim 1, which is characterized in that the strain sensitive core long 10~80mm, high by 5~
15mm。
7. strain sensitive core according to claim 1, which is characterized in that be pasted with resistance strain gage in the open pore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811579704.3A CN109374162B (en) | 2018-12-24 | 2018-12-24 | A kind of strain sensitive core for force snesor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811579704.3A CN109374162B (en) | 2018-12-24 | 2018-12-24 | A kind of strain sensitive core for force snesor |
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| Publication Number | Publication Date |
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| CN109374162A true CN109374162A (en) | 2019-02-22 |
| CN109374162B CN109374162B (en) | 2019-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811579704.3A Active CN109374162B (en) | 2018-12-24 | 2018-12-24 | A kind of strain sensitive core for force snesor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813472A (en) * | 2019-03-14 | 2019-05-28 | 湖南道达宇科技有限公司 | A kind of embedded load sensor |
Citations (7)
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|---|---|---|---|---|
| CN2118300U (en) * | 1992-05-15 | 1992-10-07 | 北京金时石油测试技术有限公司 | Force measuring mechanism with through hole internal adhesion piece |
| CN2176535Y (en) * | 1993-10-22 | 1994-09-07 | 胡光良 | Attached resistor strain sensor |
| CN2301709Y (en) * | 1997-09-05 | 1998-12-23 | 李金彪 | Non-foundation-pit track bridge type weighing sensor |
| CN103698075A (en) * | 2013-12-30 | 2014-04-02 | 天津大学 | Device for online detection for stress of hobbing cutter of tunnel boring machine |
| CN106370333A (en) * | 2016-09-21 | 2017-02-01 | 武汉大学 | TBM hobbing cutter stress online real-time monitoring apparatus and monitoring method |
| CN107014472A (en) * | 2017-05-24 | 2017-08-04 | 深圳市靖洲科技有限公司 | A kind of dynamic electron miniature self-service car weighing apparatus of single hole cantilever beam foil gauge |
| CN107144330A (en) * | 2017-05-24 | 2017-09-08 | 深圳市靖洲科技有限公司 | A kind of dynamic electron miniature self-service car weighing apparatus of diplopore cantilever beam foil gauge |
-
2018
- 2018-12-24 CN CN201811579704.3A patent/CN109374162B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2118300U (en) * | 1992-05-15 | 1992-10-07 | 北京金时石油测试技术有限公司 | Force measuring mechanism with through hole internal adhesion piece |
| CN2176535Y (en) * | 1993-10-22 | 1994-09-07 | 胡光良 | Attached resistor strain sensor |
| CN2301709Y (en) * | 1997-09-05 | 1998-12-23 | 李金彪 | Non-foundation-pit track bridge type weighing sensor |
| CN103698075A (en) * | 2013-12-30 | 2014-04-02 | 天津大学 | Device for online detection for stress of hobbing cutter of tunnel boring machine |
| CN106370333A (en) * | 2016-09-21 | 2017-02-01 | 武汉大学 | TBM hobbing cutter stress online real-time monitoring apparatus and monitoring method |
| CN107014472A (en) * | 2017-05-24 | 2017-08-04 | 深圳市靖洲科技有限公司 | A kind of dynamic electron miniature self-service car weighing apparatus of single hole cantilever beam foil gauge |
| CN107144330A (en) * | 2017-05-24 | 2017-09-08 | 深圳市靖洲科技有限公司 | A kind of dynamic electron miniature self-service car weighing apparatus of diplopore cantilever beam foil gauge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813472A (en) * | 2019-03-14 | 2019-05-28 | 湖南道达宇科技有限公司 | A kind of embedded load sensor |
| CN109813472B (en) * | 2019-03-14 | 2023-11-24 | 衡通华创(北京)科技有限公司 | Embedded load sensor |
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| Publication number | Publication date |
|---|---|
| CN109374162B (en) | 2019-10-25 |
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