CN201114085Y - Metal pipeline data-transmission coupler - Google Patents
Metal pipeline data-transmission coupler Download PDFInfo
- Publication number
- CN201114085Y CN201114085Y CNU2007201497002U CN200720149700U CN201114085Y CN 201114085 Y CN201114085 Y CN 201114085Y CN U2007201497002 U CNU2007201497002 U CN U2007201497002U CN 200720149700 U CN200720149700 U CN 200720149700U CN 201114085 Y CN201114085 Y CN 201114085Y
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- Prior art keywords
- magnetic material
- coil
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- data transmission
- transmission coupler
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- 239000002184 metal Substances 0.000 title claims abstract description 48
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 48
- 239000000696 magnetic material Substances 0.000 claims abstract description 45
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000004806 packaging method and process Methods 0.000 claims abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 9
- 238000005538 encapsulation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 5
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- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000005507 spraying Methods 0.000 description 1
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- 235000020679 tap water Nutrition 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Near-Field Transmission Systems (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The utility model discloses a metal pipeline data transmission coupler which is formed by two semi-ring shaped structures. The two semi-ring shaped structures are symmetrical, the first part comprises a packaging layer, a grounded part, magnetic material, a coil and a connector; the second part comprises a packaging layer and magnetic material, wherein, the magnetic material of the first part is semi-ring shaped, the coil is wound on the semi-ring shaped magnetic material, both ends of the coil are electrically connected with the connector, a shell of the connector is connected with the grounded part through a copper member, the packaging layer packages the grounded part, the magnetic material and the coil into a whole, the connector and the grounded part are exposed outside the packaging layer; the magnetic material of the second part is semi-ring shaped, the packaging layer packages the magnetic material into a whole; during the work, the two parts are combined with each other to form an intact ring-shaped structure, thereby being applied to metal pipeline data transmission, injecting, extracting and electrically isolating the signals, and having the lowest signal insertion loss.
Description
Technical Field
The present invention relates to a coupler, and more particularly to a coupler for transmitting data through a metal pipe.
Background
With the development of information technology, data communication systems on the market currently use optical cables, coaxial cables, ethernet cables, power lines, etc. as transmission media. However, for data transmission in some special environments, due to the need of erecting corresponding transmission media, the cost of data transmission is increased to a great extent, and meanwhile, the problem of communication unsmooth is easily caused by medium damage.
For the existing buildings, the metal pipelines including the gas pipeline, the heating pipeline, the tap water pipeline and the security protection spraying pipeline become necessary structural elements of the buildings, and are difficult to be used for signal transmission because they are generally grounded in the traditional sense, but the invention mainly considers the problem how the large insertion loss generated along with the injection of the common data signal into the metal pipeline is reduced, and the common coupler is difficult to be applied to the metal pipeline for data transmission because the insertion loss is large, therefore, the creators of the utility model finally obtain a new coupler through long-time research and test for completing the injection, extraction and the electric isolation of the data signal and the transmission medium, thereby solving the problems.
Disclosure of Invention
An object of the utility model is to provide a metal pipeline data transmission coupler for overcome above-mentioned defect.
In order to achieve the above object, the present invention provides a technical solution, which provides a metal pipeline data transmission coupler, wherein the coupler is composed of two semi-ring structures, both of which are symmetrical, and the first portion of the coupler comprises: an encapsulation layer, a grounding component, a magnetic material, a coil and a connector; the second part includes: a packaging layer and a magnetic material; wherein,
the magnetic material of the first part is in a semi-annular shape, the coil is wound on the semi-annular magnetic material, two ends of the coil are electrically connected with the connector, the connector shell is connected with the grounding part through a copper structural part, the grounding part, the magnetic material and the coil are packaged into a whole through the packaging layer, and the connector and the grounding part are exposed outside the packaging layer;
the magnetic material of the second part is in a semi-annular shape, and the packaging layer packages the magnetic material into a whole;
when the device works, the two parts are combined together to form a complete annular structure;
preferably, the packaging structure further comprises a fastener, wherein the fastener surrounds the packaged whole body to maintain the annular structure; the fastening piece is made of stainless steel metal materials;
preferably, for wideband, the operating frequency: for 2MHz-40MHz, the coil is a single-turn coil formed by winding a coaxial cable;
preferably, for the broadband, the broadband connector further comprises a U-shaped metal shell, the metal shell integrally wraps the inner wall, the outer wall and the lower bottom of the annular structure, and the connector joint and the end of the grounding part are exposed outside the metal shell to form a U shape;
preferably, for narrow bands, the operating frequency: for 9kHz-500kHz, the coil is a 3-8 turn coil formed by winding a cable with the insulation of more than 2500V;
preferably, the magnetic material is a ferrite magnetic material or an amorphous magnetic material;
preferably, the connector is a BNC connector;
preferably, one end of the grounding component is provided with a grounding terminal which is exposed outside the packaging layer;
preferably, the material of the encapsulation layer is epoxy resin.
The utility model has the advantages of, can be applied to metal pipeline data transfer to signal insertion loss is low.
Drawings
Fig. 1 is a schematic structural section view of the metal pipeline data transmission coupler of the present invention;
fig. 2 is a schematic structural diagram of a performance testing system of the metal pipeline data transmission coupler of the present invention;
fig. 3 is a flow chart of a method for manufacturing the data transmission coupler for metal pipes according to the present invention;
fig. 4 is a flow chart of another processing method of the metal pipe data transmission coupler according to the present invention.
Detailed Description
The above and further features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.
For different situation requirements, the physical conditions and requirements of the coupler itself will be different and different, and its input impedance is determined by the matching of the output impedance of the modem combined with it, for the structural features of the coupler disclosed in the present invention, for the broadband, the operating frequency: 2MHz-40 MHz; insulation resistance: 100M omega; input impedance: 50 omega; insertion loss: less than 4+2 dB; pressure resistance: 5 kV. We proceed with the following design.
Please refer to fig. 1, which is a schematic structural cross-sectional view of a metal pipeline data transmission coupler of the present invention, which is composed of two half-ring-shaped portions, the two half-ring-shaped portions are symmetrical, the difference is that, in one of the half-ring-shaped portions, a winding coil 16, a grounding assembly and a BNC connector 15 are added relative to the other half-ring-shaped portion, the cross-sectional view reflects the structure of the half-ring-shaped portion, and it includes: the encapsulating layer 13, the grounding member, the magnetic material 14, the coil 16, and the BNC joint connector 15, which are in a half-ring shape; the coil is a single-turn coil formed by winding a 50-ohm high-frequency cable, the coil is wound on the semi-annular magnetic material, two ends of the single-turn coil are electrically connected with the BNC connector 15, the BNC connector shell is connected with the grounding part through a copper structural part, the packaging layer 13 is made of epoxy resin, the grounding part, the magnetic material 14 and the coil 16 are packaged into a whole, and the connector 15 and the grounding part are exposed outside the packaging layer 13; the grounding component is composed of a grounding metal sheet 12 embedded in the packaging layer 13, and a grounding terminal 11 is arranged at the outer end of the grounding metal sheet and exposed out of the packaging layer 13;
the other part of the magnetic material 14 is also in a semi-annular shape, and the epoxy resin material of the packaging layer 13 packages the magnetic material 14 into a whole; for the wide belt, the connector can further comprise a U-shaped metal shell 17, the metal shell 17 integrally wraps the inner wall, the outer wall and the lower bottom of the annular structure, and the connector joint 15 and the end 11 of the grounding part are exposed outside the metal shell 17 to form a U shape, so that the connector not only plays a role of protecting the coupler, but also has a function of shielding external interference.
When in use, the two semi-rings are buckled on a metal pipeline, and the packaged whole is surrounded by a fastener to keep a ring-shaped structure; the fastener is made of stainless steel metal material, the BNC connector 15 is connected with a modem analog signal output port, and the ground terminal 11 can be suspended and also can be connected with the ground terminal of the modem.
For the utility model discloses a selection of magnetic material is very important, because pipeline transmission signal belongs to weak signal, has considerable scope bandwidth, requires the loss little during the signal conversion, has certain requirement to magnetic material's selection:
according to the basic law of magnetic circuit: ampere-loop law: n ═ H ═ l;
i, inputting current, N coil turns, H magnetic field intensity and l magnetic path length;
lenz's law-law of electromagnetic induction: e ═ d Φ/dt;
e induced potential, Φ flux;
mu H, B, A, E/(N, A, f)
Area of magnetic core, frequency of f signal, magnetic induction intensity of B, and magnetic permeability of mu
Further equations are derived: and B ═ μ N × I/l, the magnetic induction intensity is proportional to the current of the signal and the magnetic permeability of the magnetic material, and inversely proportional to the operating frequency of the signal.
E＝dΦ/dt＝N*A*(μ*N*dI/l)＝(μN2*A/l)*dI/dt，
Therefore, the inductance L is μ N2A/L, and the inductance with air gap
<math>
<mrow>
<mi>L</mi>
<mo>=</mo>
<msub>
<mi>μ</mi>
<mn>0</mn>
</msub>
<mfrac>
<mrow>
<msup>
<mi>N</mi>
<mn>2</mn>
</msup>
<mo>·</mo>
<msub>
<mi>A</mi>
<mi>e</mi>
</msub>
</mrow>
<mrow>
<mrow>
<mo>(</mo>
<mfrac>
<mn>1</mn>
<msub>
<mi>μ</mi>
<mi>r</mi>
</msub>
</mfrac>
<mo>+</mo>
<mfrac>
<mi>σ</mi>
<mi>le</mi>
</mfrac>
<mo>)</mo>
</mrow>
<mo>·</mo>
<msub>
<mi>l</mi>
<mi>e</mi>
</msub>
</mrow>
</mfrac>
</mrow>
</math>
Sigma air gap length, mu0Is the permeability of a vacuum.
Core loss
The core loss Pt includes hysteresis loss Ph, eddy current loss Pe, and residual loss Pc.
The hysteresis loss Ph is the area enclosed by the hysteresis loops, the higher the frequency is, the larger Ph is, the larger the magnetic induction swing amplitude is, the larger enclosed area is, and the larger the loss is.
The excitation current flowing through the eddy current loss Pe coil induces an induced potential around the magnetic core itself, and since the resistivity of the magnetic material is not infinite, the induced voltage generates a current Ie, an eddy current, which flows through the resistance to cause the eddy current loss. The eddy current loss is independent of frequency but proportional to the resistivity of the magnetic material.
The residual loss Pc is a loss caused by a magnetization relaxation effect or a magnetic hysteresis effect.
General empirical formula of core loss
<math>
<mrow>
<mi>P</mi>
<mo>=</mo>
<mi>η</mi>
<msup>
<mi>f</mi>
<mo>∂</mo>
</msup>
<msubsup>
<mi>B</mi>
<mi>m</mi>
<mi>β</mi>
</msubsup>
<mi>V</mi>
<mo>;</mo>
</mrow>
</math>
Alpha and beta are larger than 1.
The loss is different for different magnetic materials, the loss of the magnetic material is expressed by Q value,
<math>
<mrow>
<mi>Q</mi>
<mo>=</mo>
<mi>arctan</mi>
<mfrac>
<mi>R</mi>
<mi>ωL</mi>
</mfrac>
<mo>.</mo>
</mrow>
</math>
therefore, to the present invention
The option uses a magnetic material with high mu magnetic conductivity and is sensitive to tiny signals;
the magnetic hysteresis loop is narrow, the surrounding area is small, the coercive force Hc is very small, and the magnetic hysteresis loss Ph is small;
the electrical resistivity of the magnetic material is large, and thus the eddy current loss Pe is small.
Please refer to fig. 2, which is a schematic structural diagram of a performance testing system of the metal pipeline data transmission coupler of the present invention, which is a test performed on an assembled coupler 1, and the test is performed by using a 100A, 50Hz ac signal source 2 and a 2MHz-40MHz high frequency signal source 3 as a signal generator, receiving signals through a frequency spectrograph (oscilloscope) 4:
1. attenuation characteristic test
The signal generator sends a 2MHz-40MHz sine wave with a sending power of 20dBm, the sine wave is coupled by the coupler 1, the signal is received by the frequency spectrograph 4, and the attenuation condition of the signal is checked and recorded;
2. phase shift characteristic test
The signal generator sends a sine wave of 2MHz-40MHz, the sending power is 20dBm, the sine wave is coupled by the coupler 1, the signal is received by the oscilloscope 4, the received signal is compared with the original signal, and the phase shift condition of the signal is checked and recorded;
3. magnetic saturation characteristic test
The signal generator sends a sine wave of 2MHz-40MHz, the sending power is 20dBm, the signal is coupled through the coupler, the frequency spectrograph 4 is used for receiving the signal, and the signal attenuation condition is checked and recorded;
and gradually increasing the current of the alternating current signal source passing through the coupler, and checking and recording the change condition of the signal attenuation. Through the test, confirm the utility model discloses a accord with the design requirement.
It is emphasized that for narrow bands, the operating frequency: 9kHz-500 kHz; insulation resistance: 100M omega; input impedance: 600 omega; signal attenuation: less than 4 +/-2 dB; pressure resistance: for 5kV, the coil is a coil with 3 to 8 turns which is formed by winding a cable with voltage resistance of at least 2500V.
Please refer to fig. 3, which is a flowchart illustrating a method of the metal pipeline data transmission coupler according to the present invention; the method for manufacturing the metal pipeline data transmission coupler comprises the following steps:
step a 1: arranging the magnetic material into a ring shape;
step b 1: surrounding the coil in the axial direction thereof and connecting the coil with a connector;
step c 1: cut into two symmetrical semi-rings
Step d 1: the grounding part, the magnetic material, the connector and the coil are packaged into a whole by a packaging material in one half;
step e 1: exposing one end of the connector and a grounding member to the outside;
step f 1: and the connector and the grounding component are positioned on the same semi-ring;
step g 1: the other half is also encapsulated with an encapsulating material to form a whole.
In order to achieve better effect, a drying link is preferably included after the step g1, and the packaged product is put into a high-temperature drying oven for drying;
of course for narrow bands, the operating frequency: for 9kHz-500kHz, the coil is a coil with 3 to 8 turns formed by winding a high-frequency cable.
For the broadband, a step of re-packaging by using a U-shaped metal shell is also needed, the inner wall, the outer wall and the lower bottom of the annular structure are integrally wrapped by the metal shell, and the connector joint and the end head of the grounding part are exposed outside the metal shell to form a U shape.
Please refer to fig. 4, which is a flowchart illustrating another method for manufacturing a metal pipe data transmission coupler according to the present invention; the method is also used for manufacturing the metal pipeline data transmission coupler, but has certain difference from the method in process, and comprises the following steps:
step a 2: arranging the magnetic material into a ring shape;
step b 2: surrounding the coil in the axial direction thereof and connecting the coil with a connector;
step c 2: packaging the grounding part, the magnetic material, the connector and the coil into a whole by using packaging materials;
step d 2: exposing one end of the connector and a grounding member to the outside;
step e 2: cutting the packaged whole into two symmetrical semicircular rings;
step f 2: and the connector and the grounding component are positioned on the same semi-ring;
step g 2: the cut is encapsulated with an encapsulating material.
For better effect, it is preferable to further include a drying step after the step e2, and the packaged product is dried in a high temperature drying oven.
Of course for narrow bands, the operating frequency: for 9kHz-500kHz, the coil is a coil with 3 to 8 turns formed by winding a high-frequency cable.
For the broadband, a step of re-packaging by using a U-shaped metal shell is also needed, the inner wall, the outer wall and the lower bottom of the annular structure are integrally wrapped by the metal shell, and the connector joint and the end head of the grounding part are exposed outside the metal shell to form a U shape.
The foregoing is only a preferred embodiment of the present invention, which is illustrative, not limiting. Those skilled in the art will appreciate that many variations, modifications, and equivalents may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A metal pipeline data transmission coupler is composed of two semi-annular structures which are symmetrical, and is characterized in that a first part comprises: an encapsulation layer, a grounding component, a magnetic material, a coil and a connector; the second part includes: a packaging layer and a magnetic material; wherein,
the magnetic material of the first part is in a semi-annular shape, the coil is wound on the semi-annular magnetic material, two ends of the coil are electrically connected with the connector, the connector shell is connected with the grounding part through a copper structural part, the grounding part, the magnetic material and the coil are packaged into a whole through the packaging layer, and the connector and the grounding part are exposed outside the packaging layer;
the magnetic material of the second part is in a semi-annular shape, and the packaging layer packages the magnetic material into a whole;
when in work, the two parts are combined together to form a complete annular structure.
2. The metal pipe data transmission coupler of claim 1, further comprising a fastener, said fastener enclosing said integral enclosure for maintaining a ring configuration; the fastener is made of stainless steel metal materials.
3. The metal pipe data transmission coupler of claim 1, wherein for broadband, the operating frequency is: for 2MHz-40MHz, the coil is a single-turn coil formed by winding a coaxial cable.
4. The metal pipe data transmission coupler of claim 1, further comprising a U-shaped metal housing for the broadband, wherein the metal housing integrally wraps the inner wall, the outer wall and the bottom of the ring structure, and the connector fitting and the end of the grounding member are exposed outside the metal housing to form a U-shape.
5. The metal pipe data transmission coupler of claim 1, wherein for a narrow band, the operating frequency is: for 9kHz-500kHz, the coil is a coil with 3 to 8 turns, and the coil is formed by winding a cable with at least 2500V of insulation strength.
6. The metal pipe data transmission coupler of claim 1, wherein the magnetic material is a ferrite magnetic material or an amorphous magnetic material.
7. The metal pipe data transmission coupler of claim 1, wherein said connector is a BNC connector.
8. The metal pipe data transmission coupler of claim 1, wherein one end of said grounding member is provided with a grounding terminal exposed outside of said encapsulation layer.
9. The metal pipe data transmission coupler of claim 1, wherein the material of the encapsulation layer is an epoxy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201497002U CN201114085Y (en) | 2007-06-19 | 2007-06-19 | Metal pipeline data-transmission coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201497002U CN201114085Y (en) | 2007-06-19 | 2007-06-19 | Metal pipeline data-transmission coupler |
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| Publication Number | Publication Date |
|---|---|
| CN201114085Y true CN201114085Y (en) | 2008-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201497002U Expired - Lifetime CN201114085Y (en) | 2007-06-19 | 2007-06-19 | Metal pipeline data-transmission coupler |
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| Country | Link |
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| CN (1) | CN201114085Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072049B (en) * | 2007-06-19 | 2010-08-25 | 北京意科通信技术有限责任公司 | Metal pipeline data transmission coupler and its processing method |
| CN102394703A (en) * | 2011-11-23 | 2012-03-28 | 太原海斯特电子有限公司 | Inductive communication method used in tunnel of coal mine |
-
2007
- 2007-06-19 CN CNU2007201497002U patent/CN201114085Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101072049B (en) * | 2007-06-19 | 2010-08-25 | 北京意科通信技术有限责任公司 | Metal pipeline data transmission coupler and its processing method |
| CN102394703A (en) * | 2011-11-23 | 2012-03-28 | 太原海斯特电子有限公司 | Inductive communication method used in tunnel of coal mine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20080910 Effective date of abandoning: 20070619 |