CN207019820U - Magnetic stress sensor and its shielding construction - Google Patents
Magnetic stress sensor and its shielding construction Download PDFInfo
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- CN207019820U CN207019820U CN201720721009.0U CN201720721009U CN207019820U CN 207019820 U CN207019820 U CN 207019820U CN 201720721009 U CN201720721009 U CN 201720721009U CN 207019820 U CN207019820 U CN 207019820U
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Abstract
The utility model discloses a kind of shielding construction of magnetic stress sensor, include coil rack outward by inner, secondary coil, primary coil and shielding shell, coil rack periphery is wound with first layer metal paper tinsel and forms first screen layer, secondary coil is on the outside of first screen layer, second layer metal paper tinsel is wound with the outside of secondary coil and forms secondary shielding layer, primary coil is on the outside of secondary shielding layer, third layer metal foil forms the 3rd screen layer on the outside of primary coil, first screen layer, the winding initiating terminal and winding end of secondary shielding layer and the 3rd screen layer difference are mutually isolated.The invention also discloses the magnetic stress sensor with above-mentioned shielding construction.The utility model can effectively shield extraneous strong electromagnetic so that sensor can be in any measurement occasion installation test for meeting mounting condition without influenceing its measurement accuracy and stability.
Description
Technical field
It the utility model is related to magnetic stress testing equipment field, more particularly to a kind of detect what is be twisted by steel wire strand
The internal stress measurement apparatus and its shielding construction of the ferromagnetic material such as cable wire or reinforcing bar, rod iron.
Background technology
The magnetic stress sensor that magnetoelasticity principle based on ferromagnetic material makes, formed using measured steel component
Sensor, when the stress that it bears changes, the magnetic conductivity of the steel component changes simultaneously, by measuring the magnetic conductance
The variable quantity of rate, determine the stress intensity in steel component.
During magnetic stress sensor carries out accurately monitoring and follow-up operation maintenance for the stretching process of steel component
Long term monitoring, be a kind of measurement apparatus for needing stable measurement accuracy guarantee, but in some strong-electromagnetic field environment easily by
Interference, this lead of the interference between tested component, spacing electromagnetic radiation and sensor and instrument, influence measurement accuracy and
Stability.
Utility model content
In order to solve the above problems, the purpose of this utility model is that design one kind can effectively shield extraneous strong electromagnetic
Magnetic stress sensor and its shielding construction so that measurement occasion installation test that sensor can meet mounting condition any and
Its measurement accuracy and stability are not influenceed.
In order to realize above-mentioned purpose, the utility model employs following technical scheme：
The shielding construction of magnetic stress sensor, included outward outside coil rack, secondary coil, primary coil and shielding by inner
Shell, coil rack periphery are wound with first layer metal paper tinsel and form first screen layer, secondary coil on the outside of the first screen layer,
The length of first screen layer is suitable with the spooling length of secondary coil, and second layer metal paper tinsel is wound with the outside of secondary coil and forms the
Two screen layers, primary coil is on the outside of secondary shielding layer, in the length and secondary coil and secondary coil of secondary shielding layer
Longer spooling length is suitable, and third layer metal foil forms the 3rd screen layer on the outside of primary coil, the 3rd screen layer
Length is suitable with the spooling length of primary coil, and first screen layer, secondary shielding layer and the 3rd screen layer draw ground connection respectively
Line and magnetic induction sensor measuring system common ground connection, and the winding of first screen layer, secondary shielding layer and the 3rd screen layer rises
Top and winding end difference are mutually isolated.
As one of which embodiment, there is the stacking of one fixed width between winding initiating terminal and the winding end of metal foil
Area, stacking width are lined with insulating materials between 1-20mm between the two panels metal foil of stacking.
As one of which embodiment, left between winding initiating terminal and the winding end of metal foil between one fixed width
Gap, gap width is between 0.2-5mm.
Preferably, shielding enclosure is provided with the installation cavity for set winding skeleton, after coil rack installation,
Penetrated respectively with outside for steel component insertion to be measured inside shielding shell and coil rack.
Magnetic stress sensor, including the as above shielding construction of the magnetic stress sensor described in any one.
The shielding construction of above-mentioned magnetic stress sensor, using the electromagnetism of the scheme of three layers of shielding, effectively isolation surrounding environment
Interference, ensure measurement accuracy and stability of the magnetic stress sensor under strong electromagnetic interference environment.Also, due to forming screen layer
Metal foil winding initiating terminal and winding end do not contact directly, do not form loop, vortex will not be produced, but screen can be played
Cover the effect of outside electromagnetic interference.Magnetic stress sensor with above-mentioned shielding construction is equally with above-mentioned beneficial effect.
Brief description of the drawings
Fig. 1 is the shielding construction schematic diagram of the utility model magnetic stress sensor.
Fig. 2 is the structural representation of lap wound screen layer in the utility model.
Fig. 3 is the structural representation of the utility model intermediate gap screen layer.
Wherein：1st, coil rack, 2, secondary coil, 3, primary coil, 31, banking stop, 4, shell, 5-1, first layer metal
Paper tinsel, 5-2, second layer metal paper tinsel, 5-3, third layer metal foil, 6, stacking area, 7, insulating barrier, 8, gap.
Embodiment
The preferred embodiment of this patent is described in further detail below in conjunction with the accompanying drawings.Wherein, with coil rack
Axis where direction be length direction.
Magnetic stress sensor as shown in Figure 1, include coil rack 1, secondary coil 2, primary coil 3 and screen outward by interior
Cover shell 4.The periphery of coil rack 1 is wound with first layer metal paper tinsel 5-1 and forms first screen layer, and secondary coil 3 is wound on first
On the outside of screen layer, the length of first screen layer is suitable with the spooling length of secondary coil 2, and the outside of secondary coil 2 is wound with second
Layer metal foil 5-2 forms secondary shielding layer, primary coil 3 on the outside of secondary shielding layer, the length of secondary shielding layer with time
Level coil 2 is suitable with spooling length longer in primary coil 3, and third layer metal foil 5-3 is formed wound on the outside of primary coil 3
3rd screen layer, the length of the 3rd screen layer are suitable with the spooling length of primary coil 3.First screen layer, secondary shielding layer with
And the 3rd screen layer draw respectively ground wire with magnetic induction sensor measuring system common ground connection.Spooling length quite refers to shielding
The distance of the adjacent end portion of layer and coil is covered in the range of -5mm~2cm.
First layer metal paper tinsel 5-1, second layer metal paper tinsel 5-2 and third layer metal foil 5-3 select copper foil or aluminium foil, they
Thickness between 0.05mm-0.6mm, metal foil winding after have two kinds of screen layer：First, lap wound screen layer, such as Fig. 2
It is shown, have the stacking area 6 of one fixed width between winding initiating terminal and the winding end of metal foil, stacking width 1-20mm it
Between, it is lined with insulating barrier 7 between the two panels metal foil of stacking and separates；Second, gap shielding layer, as shown in figure 3, the winding of metal foil
The gap 8 of one fixed width is left between initiating terminal and winding end, the width of gap 8 is between 0.2-5mm.Above two type
Screen layer, because the winding initiating terminal and winding end of metal foil do not contact directly, do not form closed-loop path, such knot
Structure, vortex will not be produced when being detected but can play a part of shielding outside electromagnetic interference.
First layer metal paper tinsel 5-1, secondary coil 2, second layer metal paper tinsel 5-2, primary coil 3 and third layer metal foil 5-3
After being wound up into successively on coil rack 1, coil rack 1 is arranged in the cavity volume inside shielding shell 4.Preferably coil rack 1
The banking stop 11 that outer wall is provided with a pair of parallel setting will mark off wrapping range on coil rack.Shield shell and coil rack
It is internal to be penetrated respectively with outside for steel component insertion to be measured.
Claims (5)
1. the shielding construction of magnetic stress sensor, it is characterised in that include coil rack outward by inner（1）, secondary coil（2）、
Primary coil（3）With shielding shell（4）, coil rack（1）Periphery is wound with first layer metal paper tinsel（5-1）Form the first shielding
Layer, secondary coil（2）On the outside of first screen layer, the width and secondary coil of first screen layer（2）Spooling length phase
When secondary coil（2）Outside is wound with second layer metal paper tinsel（5-2）Form secondary shielding layer, primary coil（3）Wound on second
On the outside of screen layer, the length and secondary coil of secondary shielding layer（2）And primary coil（3）In longer spooling length it is suitable,
Three-layer metal paper tinsel（5-3）Wound on primary coil（3）Outside forms the 3rd screen layer, the length and primary coil of the 3rd screen layer
（3）Spooling length it is suitable, first screen layer, secondary shielding layer and the 3rd screen layer draw respectively ground wire with magnetic induction pass
Sensor measuring system common ground connection, and first screen layer, the winding initiating terminal of secondary shielding layer and the 3rd screen layer and winding end
End is mutually isolated respectively.
2. the shielding construction of magnetic stress sensor according to claim 1, it is characterised in that the winding initiating terminal of metal foil
There is the stacking area of one fixed width between winding end（7）, stacking width is between 1-20mm, between the two panels metal foil of stacking
Insulating barrier is lined with to separate.
3. the shielding construction of magnetic stress sensor according to claim 1, it is characterised in that the winding initiating terminal of metal foil
The gap of one fixed width is left between winding end（8）, gap width is between 0.2-5mm.
4. the shielding construction of magnetic stress sensor according to claim 1, it is characterised in that shielding shell（4）Inside is set
There are the installation cavity for positioning bobbin, coil rack（1）After installation, shield inside shell and coil rack respectively with
Outside is penetrated for steel component insertion to be measured.
5. magnetic stress sensor, it is characterised in that passed including the magnetic stress as any one of claim 1- claims 4
The shielding construction of sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720721009.0U CN207019820U (en) | 2017-06-20 | 2017-06-20 | Magnetic stress sensor and its shielding construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720721009.0U CN207019820U (en) | 2017-06-20 | 2017-06-20 | Magnetic stress sensor and its shielding construction |
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| Publication Number | Publication Date |
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| CN207019820U true CN207019820U (en) | 2018-02-16 |
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| CN201720721009.0U Active CN207019820U (en) | 2017-06-20 | 2017-06-20 | Magnetic stress sensor and its shielding construction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990925A (en) * | 2019-05-07 | 2019-07-09 | 四川睿铁科技有限责任公司 | A kind of integral structure of bridge cable magnetic stress sensor |
| CN110229956A (en) * | 2019-07-03 | 2019-09-13 | 内蒙古科技大学 | A kind of steel residual stress removal device |
| CN111693185A (en) * | 2020-07-27 | 2020-09-22 | 广州特种机电设备检测研究院 | Crane wheel pressure testing device and method based on coercive force |
-
2017
- 2017-06-20 CN CN201720721009.0U patent/CN207019820U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990925A (en) * | 2019-05-07 | 2019-07-09 | 四川睿铁科技有限责任公司 | A kind of integral structure of bridge cable magnetic stress sensor |
| CN110229956A (en) * | 2019-07-03 | 2019-09-13 | 内蒙古科技大学 | A kind of steel residual stress removal device |
| CN111693185A (en) * | 2020-07-27 | 2020-09-22 | 广州特种机电设备检测研究院 | Crane wheel pressure testing device and method based on coercive force |
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