CN206711664U - A kind of fire-retardant double shield type safety monitoring optoelectronic composite cable of tension - Google Patents
A kind of fire-retardant double shield type safety monitoring optoelectronic composite cable of tension Download PDFInfo
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- CN206711664U CN206711664U CN201621463861.4U CN201621463861U CN206711664U CN 206711664 U CN206711664 U CN 206711664U CN 201621463861 U CN201621463861 U CN 201621463861U CN 206711664 U CN206711664 U CN 206711664U
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- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 230000005693 optoelectronics Effects 0.000 title claims abstract description 34
- 239000003063 flame retardant Substances 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 26
- 239000004760 aramid Substances 0.000 claims abstract description 21
- 229920003235 aromatic polyamide Polymers 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000000903 blocking effect Effects 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 230000004888 barrier function Effects 0.000 claims abstract description 14
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 229920006267 polyester film Polymers 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 31
- 229910052802 copper Inorganic materials 0.000 claims description 31
- 239000010949 copper Substances 0.000 claims description 31
- 239000013307 optical fiber Substances 0.000 claims description 19
- 239000004020 conductor Substances 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 13
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 10
- 239000005030 aluminium foil Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000007747 plating Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 239000006071 cream Substances 0.000 claims description 7
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 7
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 7
- 239000004800 polyvinyl chloride Substances 0.000 claims description 7
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 5
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 4
- 239000002985 plastic film Substances 0.000 claims description 4
- 229920006255 plastic film Polymers 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 15
- 230000005622 photoelectricity Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000006855 networking Effects 0.000 description 5
- 230000007123 defense Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000033772 system development Effects 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- RQFBBPNVEJATBH-UHFFFAOYSA-N [Cr].[Cd] Chemical compound [Cr].[Cd] RQFBBPNVEJATBH-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000004744 fabric Substances 0.000 description 1
- -1 flame retardant compound Chemical class 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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Abstract
The utility model belongs to photoelectricity technical field of cables, and in particular to a kind of fire-retardant double shield type safety monitoring optoelectronic composite cable of tension.The utility model includes center reinforcemen, optical communication element, power line, radio frequency coaxial-cable, polyester film insulating barrier, water blocking layer, double shield layer, aramid yarn layer tension and oversheath.Described fiber optic communication unit, power line and radio frequency coaxial-cable is twisted around center reinforcemen in a manner of SZ strandings, described polyester film insulating barrier is wrapped in the outside of optical communication element, power line and radio frequency coaxial-cable, described water blocking layer is wrapped in the outside of polyester film insulating barrier, described double shield layer is wrapped in the outside of water blocking layer, described aramid yarn tensile layer is wrapped on the outside of double shield layer, and described oversheath is wrapped in the outside of aramid yarn tensile layer.The utility model has the optoelectronic composite cable of simultaneous transmission optical signal, electric signal and low tension, and increases the performance such as tension, fire-retardant, double shield.
Description
Technical field
The utility model belongs to photoelectricity technical field of cables, and in particular to a kind of fire-retardant double shield type safety monitoring of tension is used
Optoelectronic composite cable.
Background technology
Optoelectronic composite cable makees transmission line suitable for broadband access network system, is a kind of new access way, its light harvesting
Fine, transmission of electricity copper cash can solve the problems, such as broadband access, equipment electricity consumption, signal transmission in one.It the advantage is that：External diameter is small,
It is in light weight, occupy little space；Client's purchase cost is low, and operating expenses is low, and networking expense is low；With superior bending property
It is easy for construction with good resistance to side pressure performance；A variety of transmission technologys are provided simultaneously, the adaptability height, scalability with equipment are strong,
Product is widely applicable；Huge bandwidth access is provided；It is cost-effective, optical fiber is used as to family is reserved and is used, avoids secondary cloth
Line；Solve equipment electrical problem in networking to avoid repeating to lay supply line.
As information technology, network technology develop rapidly, safety defense monitoring system is not only in communication, traffic, safety
Deng sector application, optoelectronic composite cable is progressively developing in direction to other industry, the public.Bank, card are had been widely used at present
Certificate place of business, enterprises and institutions, office, commercial location internal and external environment, building passage, parking lot, in high-grade community family
The places such as external environment condition, library, hospital, park.With computer, network and image procossing, the hair at full speed of transmission technology
Exhibition, safety monitoring technology also have significant progress, progressively developed to digitlization, networking, system integration direction.
Safety defense monitoring system is to apply coaxial cable transmission video signal in the loop that it is closed, and from shooting to image
The system that display and record form independent completion, it is electronic technology, the communication technology, computer networking technology and new and high technology phase
With reference to system.It is original coaxial as safety defense monitoring system progressively develops to digitlization, networking, system integration direction
Cable can not meet monitored picture real-time display, and the single channel regulation of video recording image quality, per road, video recording speed can be set respectively,
The functions such as quick-searching, a variety of video recording mode set-up functions, automated back-up, network transmission.
Therefore the functions such as a kind of optoelectronic composite cable energy simultaneous transmission optical signal, electric signal, power supply are needed, ensure safety monitoring
System upgrade, which is regenerated, to be needed.
Utility model content
The problem of existing for prior art, the purpose of this utility model are to provide a kind of tension fire-retardant double shield type peace
Anti- monitoring optoelectronic composite cable.A kind of fire-retardant double shield type safety monitoring of tension of the utility model has simultaneously with optoelectronic composite cable
The optoelectronic composite cable of optical signal, electric signal and low tension is transmitted, and increases the performance such as tension, fire-retardant, double shield, meets that security protection is supervised
The needs of System Development are controlled, while there is waterproof, protection against the tide, insulation, heat-insulated, in light weight, larger pulling force can be born,
Make overall optoelectronic composite cable that there is flexibility simultaneously, be easily installed construction, power line is grounded safe and reliable in use, nothing
Danger Electric shock risk.
In order to solve the above technical problems, the technical solution adopted in the utility model is.
A kind of fire-retardant double shield type safety monitoring optoelectronic composite cable of tension, including center reinforcemen, optical communication element, electricity
Source line, radio frequency coaxial-cable, polyester film insulating barrier, water blocking layer, double shield layer, aramid yarn layer tension and oversheath.Described light
Fiber communication unit, power line and radio frequency coaxial-cable are twisted around center reinforcemen in a manner of SZ strandings, described polyester film
Insulating barrier is wrapped in the outside of optical communication element, power line and radio frequency coaxial-cable, and described water blocking layer is wrapped in polyester film
The outside of insulating barrier, described double shield layer are wrapped in the outside of water blocking layer, and described aramid yarn tensile layer is wrapped in double shield
Layer outside, described oversheath are wrapped in the outside of aramid yarn tensile layer.
A kind of preferred scheme of the present utility model, described center reinforcemen are fibre-reinforced plastics FRP.
Another preferred scheme of the present utility model, described fiber optic communication unit is by optical fiber, optical fiber cream and Loose tube group
Into described Loose tube is wrapped in the outside of optical fiber and optical fiber cream.
Further described fiber optic communication element number is 1-2 roots, and described number of fibers is 1-12 cores.
The third preferred scheme of the present utility model, the described power line are protected by copper conductor core and crosslinked polyethylene
Set composition, described crosslinked polyethylene sheath are wrapped in the outside of copper conductor core.
4th kind of preferred scheme of the present utility model, described radio frequency coaxial-cable is by copper conductor, solid insulation layer, aluminium foil
Layer, the tin plating woven mesh layer of copper and polyvinyl chloride external sheath layer composition, described solid insulation layer are wrapped in the outside of copper conductor, institute
The aluminium foil layer stated is wrapped in the outside of solid insulation layer, and the tin plating woven mesh layer of copper is wrapped in the outside of aluminium foil layer, described
Polyvinyl chloride external sheath layer is wrapped in the outside of the tin plating woven mesh layer of copper.
Further, described water blocking layer is the non-woven fabrics that blocks water.
Further, described double shield layer is made up of internal layer aluminum plastic film screen layer and outer layer copper mesh grid screen layer.
Further, described aramid yarn tensile layer is the aramid yarn of Du Pont 1414, and quantity is 48.
Further, the described external sheath layer material is low smoke halogen-free fire retardant polyolefin cable material.
The beneficial effects of the utility model.
1st, the utility model provides the optoelectronic composite cable of a kind of energy simultaneous transmission optical signal, electric signal and low tension, and increases
Add the performance such as tension, fire-retardant, double shield, meet the needs of safety defense monitoring system development.
2nd, the utility model has a polyester film layer insulating barrier, ensures that power line and screen layer are non-conductive, even if internal electricity
Source line has the situation of breakage, and outside screen layer ensures that operator's non-contact electric is dangerous without electricity.
3rd, the utility model wraps up double shield layer outside insulating barrier, and double shield layer is by internal layer aluminum plastic film screen layer and outer layer
Copper mesh grid screen layer forms, and such combination can prevent external interference signal from entering the inside of optoelectronic composite cable, effectively
Reduce the loss of transmission signal.
4th, the utility model aramid yarn tensile layer is the aramid yarn of Du Pont 1414, and it is larger to ensure that optoelectronic composite cable can be born
Pulling force, while make overall composite rope that there is flexibility, it is easily installed construction.
5th, oversheath of the present utility model uses low smoke halogen-free fire retardant polyolefin cable material, without halogen, not leaded cadmium chromium
The sizing material of the surrounding materials such as mercury is made, and the eco-type flame retardant compound of toxic smog will not be sent during burning, when fire occurs, sprawling
Speed is slow, and smoke density is low, it is seen that degree is high, and pernicious gas burst size is small, is easy to personnel to withdraw.The corrosivity of burning gases is small,
Avoid the infringement to instrument and equipment, low halogen, the characteristic of Halogen so that cable material is in ageing-resistant and UV resistant and other spokes
Greatly improved according to performance, so as to extend the service life of cable.
6th, power line ground connection of the present utility model, it is ensured that system safety.
7th, center reinforcemen of the present utility model causes optoelectronic composite cable to have insulation using fibre-reinforced plastics FRP
The advantages that property is good, in light weight, thermal insulation is good, tensile strength is high.
8th, the utility model number of fibers can select, fiber optic communication element number according to communication needs in 1-12 cores
It can be chosen in 1-2 roots, different demands can be met.
9th, water blocking layer described in the utility model can play waterproof, moistureproof effect using the non-woven fabrics that blocks water.
Brief description of the drawings
Fig. 1 is profile of the present utility model.
Fig. 2 is the profile of the utility model optical communication element.
Fig. 3 is the profile of the utility model power line.
Fig. 4 is the profile of radio frequency coaxial-cable.
In figure：1st, reinforcer centered on；2nd, optical communication element；3rd, power line；4th, radio frequency coaxial-cable；5 polyester films insulate
Layer；6th, water blocking layer；7th, foil shielding layer；8th, copper mesh grid screen layer；9th, aramid yarn tensile layer；10th, oversheath；21st, optical fiber；
22nd, optical fiber cream；23rd, Loose tube；31st, copper conductor core；32nd, crosslinked polyethylene sheath；41st, copper conductor；42nd, solid insulation layer；
43rd, aluminium foil layer；44th, the tin plating woven mesh layer of copper；45th, polyvinyl chloride external sheath layer.
Embodiment
For a further understanding of the utility model, the utility model preferred embodiment is retouched with reference to embodiment
State, but it is to be understood that these descriptions are simply further explanation feature and advantage of the present utility model, rather than to this practicality
The limitation of new claim.
A kind of fire-retardant double shield type safety monitoring optoelectronic composite cable of tension, including center reinforcemen, optical communication element, electricity
Source line, radio frequency coaxial-cable, polyester film insulating barrier, water blocking layer, double shield layer, aramid yarn layer tension and oversheath.Described light
Fiber communication unit, power line and radio frequency coaxial-cable are twisted around center reinforcemen in a manner of SZ strandings, described polyester film
Insulating barrier is wrapped in the outside of optical communication element, power line and radio frequency coaxial-cable, and described water blocking layer is wrapped in polyester film
The outside of insulating barrier, described double shield layer are wrapped in the outside of water blocking layer, and described aramid yarn tensile layer is wrapped in double shield
Layer outside, described oversheath are wrapped in the outside of aramid yarn tensile layer.
A kind of preferred scheme of the present utility model, described center reinforcemen are fibre-reinforced plastics FRP.
Another preferred scheme of the present utility model, described fiber optic communication unit is by optical fiber, optical fiber cream and Loose tube group
Into described Loose tube is wrapped in the outside of optical fiber and optical fiber cream.
Further described fiber optic communication element number is 1-2 roots, and described number of fibers is 1-12 cores.
The third preferred scheme of the present utility model, the described power line are protected by copper conductor core and crosslinked polyethylene
Set composition, described crosslinked polyethylene sheath are wrapped in the outside of copper conductor core.
4th kind of preferred scheme of the present utility model, described radio frequency coaxial-cable is by copper conductor, solid insulation layer, aluminium foil
Layer, the tin plating woven mesh layer of copper and polyvinyl chloride external sheath layer composition, described solid insulation layer are wrapped in the outside of copper conductor, institute
The aluminium foil layer stated is wrapped in the outside of solid insulation layer, and the tin plating woven mesh layer of copper is wrapped in the outside of aluminium foil layer, described
Polyvinyl chloride external sheath layer is wrapped in the outside of the tin plating woven mesh layer of copper.
Further, described water blocking layer is the non-woven fabrics that blocks water.
Further, described double shield layer is made up of internal layer aluminum plastic film screen layer and outer layer copper mesh grid screen layer.
Further, described aramid yarn tensile layer is the aramid yarn of Du Pont 1414, and quantity is 48.
Further, the described external sheath layer material is low smoke halogen-free fire retardant polyolefin cable material.
It is of the present utility model to use field.
（1）Application in wired access network.
Optoelectronic composite cable makees transmission line suitable for broadband access network system, and it integrates optical fiber, transmission of electricity copper cash, simultaneously
Can solve equipment electricity consumption and signal transmission issues, avoid repeating to lay supply line.
（2）Application in mobile communication base station.
The use of optoelectronic composite cable, the solution for communication base station power supply aspect problem provide new scheme, are not only to transport
Battalion business saves fund, reduces cost, more largely solves the practical difficulties such as addressing, construction, later maintenance.
（3）The application in wind power plant at sea.
Wind power generating set and the information channel of main control room are connected using optoelectronic composite cable, help to realize the intelligence of unit
Change automatically controls, monitors and the control function such as telecommunication；According to the stress-strain characteristics of optoelectronic composite cable, extra large cable is effectively controlled
Performance and state, maintenance for submarine cable and using effectively being guarded.
（4）Application in ocean development.
Sea floor optoelectronic composite cable is exactly that the optical fiber with optical communication capabilities and reinforcement structure is added in sea electric power cable
Unit, the dual-use function of power transmission and fiber information transmission is made it have, the seabed of same line arrangement can be substituted completely
Cable, submarine optical fiber cable, ocean route resource is saved, has reduced manufacturing cost expense, offshore construction expense, road bank landing charge and use,
Comprehensive cost and the investment of project are directly reduced, and has saved the workload of oceanographic survey, later stage route maintenance work indirectly
Make.
（5）Application in petroleum recovering platform.
The power transmission in production platform and continent can be connected using optoelectronic composite cable in petroleum recovering platform, to avoid
Very heavy generating equipment is installed on production platform, operation maintenance and fuel consumption is reduced, several production platforms can be also connected to
Together, with the generated energy of shared enough and to spare.When forming production platform looped network, when can guarantee that contingency cable or generating equipment failure,
There is very high power supply reliability.
It is understood that above with respect to specific descriptions of the present utility model, it is merely to illustrate the utility model and is not
The technical scheme described by the utility model embodiment is limited to, it will be understood by those within the art that, still can be with
The utility model is modified or equivalent substitution, to reach identical technique effect；As long as satisfaction uses needs, all in this reality
Within new protection domain.
Claims (10)
- A kind of 1. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension, it is characterised in that：Including center reinforcemen, optical fiber Communication unit, power line, radio frequency coaxial-cable, polyester film insulating barrier, water blocking layer, double shield layer, aramid yarn layer tension and outer shield Set, described fiber optic communication unit, power line and radio frequency coaxial-cable are twisted around center reinforcemen in a manner of SZ strandings, institute The polyester film insulating barrier stated is wrapped in the outside of optical communication element, power line and radio frequency coaxial-cable, described water blocking layer bag The outside of polyester film insulating barrier is rolled in, described double shield layer is wrapped in the outside of water blocking layer, described aramid yarn tensile layer bag It is rolled on the outside of double shield layer, described oversheath is wrapped in the outside of aramid yarn tensile layer.
- A kind of 2. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension according to claim 1, it is characterised in that： Described center reinforcemen is fibre-reinforced plastics FRP.
- A kind of 3. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension according to claim 1, it is characterised in that： Described fiber optic communication unit is made up of optical fiber, optical fiber cream and Loose tube, and described Loose tube is wrapped in optical fiber and optical fiber cream Outside.
- A kind of 4. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension according to claim 3, it is characterised in that： Described fiber optic communication element number is 1-2 roots, and described number of fibers is 1-12 cores.
- A kind of 5. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension according to claim 4, it is characterised in that： The power line is made up of copper conductor core and crosslinked polyethylene sheath, and described crosslinked polyethylene sheath is wrapped in copper conductor line The outside of core.
- A kind of 6. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension according to claim 1, it is characterised in that： Described radio frequency coaxial-cable is by copper conductor, solid insulation layer, aluminium foil layer, the tin plating woven mesh layer of copper and polyvinyl chloride external sheath layer Composition, described solid insulation layer are wrapped in the outside of copper conductor, and described aluminium foil layer is wrapped in the outside of solid insulation layer, institute The outside that the tin plating woven mesh layer of copper is wrapped in aluminium foil layer is stated, described polyvinyl chloride external sheath layer is wrapped in the tin plating woven mesh layer of copper Outside.
- A kind of 7. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension according to claim 1, it is characterised in that： Described water blocking layer is the non-woven fabrics that blocks water.
- A kind of 8. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension according to claim 1, it is characterised in that： Described double shield layer is made up of internal layer aluminum plastic film screen layer and outer layer copper mesh grid screen layer.
- A kind of 9. fire-retardant double shield type safety monitoring optoelectronic composite cable of tension according to claim 1, it is characterised in that： Described aramid yarn tensile layer is the aramid yarn of Du Pont 1414, and quantity is 48.
- 10. the fire-retardant double shield type safety monitoring optoelectronic composite cable of a kind of tension according to claim 1, its feature exist In：The external sheath layer material is low smoke halogen-free fire retardant polyolefin cable material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621463861.4U CN206711664U (en) | 2016-12-29 | 2016-12-29 | A kind of fire-retardant double shield type safety monitoring optoelectronic composite cable of tension |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621463861.4U CN206711664U (en) | 2016-12-29 | 2016-12-29 | A kind of fire-retardant double shield type safety monitoring optoelectronic composite cable of tension |
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| CN206711664U true CN206711664U (en) | 2017-12-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110010293A (en) * | 2019-05-16 | 2019-07-12 | 江苏港通电缆有限公司 | A kind of electro-optical composite cable |
| CN111554441A (en) * | 2020-05-13 | 2020-08-18 | 长春烽火技术有限公司 | Manufacturing and using method of photoelectric composite cable |
| CN112071496A (en) * | 2020-09-21 | 2020-12-11 | 湘潭市特种线缆股份有限公司 | Photoelectric integrated cable network assembly for aircraft engine control system and manufacturing method thereof |
-
2016
- 2016-12-29 CN CN201621463861.4U patent/CN206711664U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110010293A (en) * | 2019-05-16 | 2019-07-12 | 江苏港通电缆有限公司 | A kind of electro-optical composite cable |
| CN111554441A (en) * | 2020-05-13 | 2020-08-18 | 长春烽火技术有限公司 | Manufacturing and using method of photoelectric composite cable |
| CN112071496A (en) * | 2020-09-21 | 2020-12-11 | 湘潭市特种线缆股份有限公司 | Photoelectric integrated cable network assembly for aircraft engine control system and manufacturing method thereof |
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