CN206348218U - A kind of embedded type concrete shear stress sensor - Google Patents
A kind of embedded type concrete shear stress sensor Download PDFInfo
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- CN206348218U CN206348218U CN201621270029.2U CN201621270029U CN206348218U CN 206348218 U CN206348218 U CN 206348218U CN 201621270029 U CN201621270029 U CN 201621270029U CN 206348218 U CN206348218 U CN 206348218U
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- sensitive beam
- shear stress
- chute
- baffle plate
- upper shell
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Abstract
A kind of embedded type concrete shear stress sensor disclosed in the utility model, including upper shell, lower house, described upper shell and the interface of lower house are respectively arranged with groove in one week, and the software glue-line for connecting upper and lower casing is provided with groove；The bottom of described upper shell is provided with sensitive beam, and the top of lower house, which is provided with groove profile baffle plate, described groove profile baffle plate, is provided with chute, and one end of sensitive beam is located in the chute of groove profile baffle plate；The strain sensor for perceiving sensitive beam deformation is provided with the sensitive beam；Described strain sensor is connected the measurement for realizing sensitive beam strain by lead with follow-up measuring circuit.The measurement of shear stress in concrete will can be achieved in shear stress sensor Transducers Embedded in Concrete described in the utility model, it is possible to resolve shear stress problem measured directly in concrete structure.
Description
Technical field
The utility model belongs to field of sensing technologies, more particularly to a kind of embedded type concrete shear stress sensor.
Background technology
The stress state of concrete structure is the important parameter for reflecting its security, therefore the stress of concrete structure is surveyed
Amount is the important content in concrete structure model experimental study and field monitoring.At present, concrete structure tests normally only office
It is limited to the measurement of the physical quantitys such as load, displacement, strain, and the measurement to stress is by pasting resistance in concrete structural surface
Foil gauge measures the strain of concrete surface, then obtains concrete by the modulus of elasticity conversion of the concrete material of estimation
The stress on surface, this method can not obtain the accurate stress state of inside concrete.For this kind of heterogeneous material of concrete,
Power-deformation relationship on usual macro-level does not ensure that theory analysis and uniformity of the result of the test on internal force level,
Even if the load-strain curve of body structure surface is identical, but the distribution of its component internal force may very different.Therefore, design a kind of
Sensor realizes measurement to internal force on structural key section, for concrete structure non-linear force behavior research provide according to
According to being one of important research task of structural test technology.
The internal force of concrete structure includes compression, tension and shear stress etc., and the shearing strength of concrete material is low, by
Failure by shear caused by shear stress is to cause the concrete structures such as friction pile, retaining wall, support beam to damage in civil engineering
The key factor of destruction, therefore, the shear stress under measurement working condition inside concrete structure is for concrete structure to pass
It is important, exploitation can be embedded in inside concrete, it is significant for inside concrete shear stress sensor measured directly.
Utility model content
The purpose of this utility model is to provide a kind of sensor for measuring shear stress in concrete, makes it have structure letter
The advantages of list, insertion type.
The purpose of this utility model can adopt the following technical scheme that to realize：A kind of described embedded type concrete shear stress
Sensor, including upper shell, lower house, described upper shell and the interface of lower house are respectively arranged with groove in one week, in ditch
The software glue-line for connecting upper and lower casing is provided with groove；The bottom of described upper shell is provided with sensitive beam, lower house
Top, which is provided with groove profile baffle plate, described groove profile baffle plate, is provided with chute, and one end of sensitive beam is located at the chute of groove profile baffle plate
It is interior；The strain sensor for perceiving sensitive beam deformation is provided with the sensitive beam；Described strain sensor passes through
Lead is connected the measurement for realizing sensitive beam strain with follow-up measuring circuit.
Described sensitive beam is made up of stainless steel material, generally strip, and one end of sensitive beam can be by the side of welding
Formula is connected with upper shell.
There is certain interval between this end face and chute bottom in described sensitive beam insertion chute.
Described upper shell and lower house is made up of stainless steel material, and monnolithic case is square, or circular.
Described groove profile baffle plate is made up of stainless steel material, and groove profile baffle plate can be connected with lower house by way of welding,
The width of chute thereon is consistent with sensitive beam, and ensures that sensitive beam can be moved along the length direction of groove,
Described sensitive beam and groove profile baffle plate collective effect can guarantee that the sensor is only sensitive to the shear stress in a direction,
I.e. when sensor byxDuring the shear stress of direction, sensitive beam deforms, and when it is by orthogonal direction（yDirection）During shear stress,
Sensitive beam is only moved in chute, and sensitive beam is indeformable.
Described strain sensor can use strain ga(u)ge or optical fiber Bragg raster.
In shear stress sensor Transducers Embedded in Concrete described in the utility model, when sensor in a direction by shear stress
When effect makes sensor upper shell and the lower house generation shearing changing of the relative positions, the sensitive beam inside set deforms, strain sensitive thereon
Element perceives output signal after deformation, and detection output signal is the measurable shear stress for obtaining the direction in concrete.This reality
With the direct measurement of shear stress in new achievable concrete, available for experimental study of the concrete structure by failure by shear, solution
The problem that certainly shear stress is tested in engineering site monitoring.
Brief description of the drawings
Fig. 1 is the cross-sectional view of shear stress sensor of the present utility model.
Fig. 2 is Fig. 1 A-A views.
Fig. 3 is Fig. 1 B-B views.
Fig. 4 is the schematic diagram of shear stress on certain section in solid.
In figure：1st, upper shell, 2, lower house, 3, sensitive beam, 4, groove profile baffle plate, 5, strain sensor, 6, software glue-line,
7th, lead.
Embodiment
The utility model is elaborated below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2 and Figure 3, a kind of embedded type concrete shear stress sensor disclosed in the utility model, including
Upper shell 1, lower house 2, sensitive beam 3, groove profile baffle plate 4, strain sensor 5, software glue-line 6 and lead 7.Upper shell 1 is with
The interface of housing 2 sets groove, and connection is filled by software glue-line 6.Sensitive beam 3 is set on the inside of upper shell, the inner side of lower house 2 is set
In groove profile baffle plate 4, the chute of one end insertion groove profile baffle plate 4 of sensitive beam 3, and this end face in the insertion chute of sensitive beam 3 with
Chute has certain interval between bottom.Strain sensor 5 is set in sensitive beam 3, the deformation of beam, strain sensor 5 is perceived
The measurement for realizing beam strain is connected with follow-up measuring circuit by lead 7.By in described shear stress sensor Transducers Embedded in Concrete,
When sensor is made sensor upper shell 1 and lower house 2 occur the shearing changing of the relative positions in a direction by shear stress effect, inside set
Sensitive beam 3 deforms, and strain sensor 5 thereon perceives output signal after deformation, and detection output signal is measurable obtains
The shear stress of the direction in concrete.Described upper shell 1 and lower house 2 use stainless steel material, and profile is pros
Shape, or circular, the present embodiment is square.Described software glue-line 6 uses silica type material, low with shear strength
Feature, on the one hand plays connection and sealing, on the other hand ensures two housings because reducing resistance when the changing of the relative positions occurs for shear stress.Institute
The sensitive beam 3 stated uses stainless steel material, and profile is strip, and size is determined according to the range of shear stress sensor, sensitive beam 3
One end can be connected by way of welding with upper shell 1.Described groove profile baffle plate 4 uses stainless steel material, chute thereon
Width is consistent with sensitive beam, and ensures that beam can be moved along the length direction of groove, and groove profile baffle plate can be by way of welding with
Housing 2 is connected.
Described sensitive beam 3 and the collective effect of groove profile baffle plate 4 can guarantee that the sensor is only quick to the shear stress in a direction
Sense, i.e., when sensor byxDuring the shear stress of direction, sensitive beam deforms, and when it is by orthogonal direction（yDirection）Shear stress
When, sensitive beam 3 is only moved in chute, and sensitive beam is indeformable.
As shown in figure 4, certain section in solid materialAOn shear stressτTo be suffered total on the section along shear direction
ShearingF s With sectionAArea ratio, i.e.,
τ=F s/ A（1）
Shear stress sensor described in the utility model is namely based on what this general principle was designed.When sensor processing
After good, the area of the upper surface of its upper shell 1 or the lower surface of lower house 2 is determined；When sensor Transducers Embedded in Concrete inside
Afterwards, the strain variation of sensitive beam in detection sensor 3 is passed through, you can anti-to release always cutting for the concrete structure that sensor is born
Power, by above-mentioned formula（1）Shear stress where can obtain sensor housing in surface.The strain variation amount of the sensitive beam 3 measured
Conversion coefficient between total shearing of the concrete structure born with sensor can be by the way that the shear stress sensor processed be existed
Laboratory internal calibration is obtained.It follows that being measured using after shear stress sensor Transducers Embedded in Concrete disclosed in the utility model
Obtained shear stress is the concrete average shearing stress that area is sensor housing surfaces size.
Claims (6)
1. a kind of embedded type concrete shear stress sensor, it is characterized in that：Including upper shell, lower house, described upper shell and
The interface of lower house is respectively arranged with groove in one week, and the software glue-line for connecting upper and lower casing is provided with groove；Institute
The bottom for the upper shell stated is provided with sensitive beam, and the top of lower house, which is provided with groove profile baffle plate, described groove profile baffle plate, to be set
There is chute, one end of sensitive beam is located in the chute of groove profile baffle plate；It is provided with the sensitive beam for perceiving sensitive beam deformation
Strain sensor；Described strain sensor is connected the survey for realizing sensitive beam strain by lead with follow-up measuring circuit
Amount.
2. embedded type concrete shear stress sensor according to claim 1, it is characterized in that：Described sensitive beam is by stainless
Steel material is made, generally strip, and one end of sensitive beam can be connected with upper shell by way of welding.
3. embedded type concrete shear stress sensor according to claim 1 or 2, it is characterized in that：Described sensitive beam is inserted
Entering has certain interval between this end face in chute and chute bottom.
4. embedded type concrete shear stress sensor according to claim 1, it is characterized in that：Described upper shell and lower casing
Body is made up of stainless steel material, and monnolithic case is square or circular.
5. embedded type concrete shear stress sensor according to claim 1, it is characterized in that：Described groove profile baffle plate is not by
Rust Steel material is made, and groove profile baffle plate is connected by way of welding with lower house, and the width of chute thereon is consistent with sensitive beam,
And sensitive beam bottom can be enable to be moved along the length direction of chute.
6. embedded type concrete shear stress sensor according to claim 1, it is characterized in that：Described strain sensor
For strain ga(u)ge or optical fiber Bragg raster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621270029.2U CN206348218U (en) | 2016-11-25 | 2016-11-25 | A kind of embedded type concrete shear stress sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621270029.2U CN206348218U (en) | 2016-11-25 | 2016-11-25 | A kind of embedded type concrete shear stress sensor |
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| Publication Number | Publication Date |
|---|---|
| CN206348218U true CN206348218U (en) | 2017-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621270029.2U Active CN206348218U (en) | 2016-11-25 | 2016-11-25 | A kind of embedded type concrete shear stress sensor |
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| CN (1) | CN206348218U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525576A (en) * | 2016-11-25 | 2017-03-22 | 中国人民解放军61489部队 | Embedded concrete shear stress sensor |
| JP2019066388A (en) * | 2017-10-03 | 2019-04-25 | 一般財団法人電力中央研究所 | Diagnosis method of concrete structure |
-
2016
- 2016-11-25 CN CN201621270029.2U patent/CN206348218U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525576A (en) * | 2016-11-25 | 2017-03-22 | 中国人民解放军61489部队 | Embedded concrete shear stress sensor |
| CN106525576B (en) * | 2016-11-25 | 2023-08-25 | 中国人民解放军61489部队 | Embedded concrete shear stress sensor |
| JP2019066388A (en) * | 2017-10-03 | 2019-04-25 | 一般財団法人電力中央研究所 | Diagnosis method of concrete structure |
| JP6993066B2 (en) | 2017-10-03 | 2022-01-13 | 一般財団法人電力中央研究所 | Diagnostic method for concrete structures |
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