CN105185465A - Avionic full-duplex Ethernet communication cable and manufacture method thereof - Google Patents
Avionic full-duplex Ethernet communication cable and manufacture method thereof Download PDFInfo
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- CN105185465A CN105185465A CN201510654556.7A CN201510654556A CN105185465A CN 105185465 A CN105185465 A CN 105185465A CN 201510654556 A CN201510654556 A CN 201510654556A CN 105185465 A CN105185465 A CN 105185465A
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Abstract
The invention discloses an avionic full-duplex Ethernet communication cable and a manufacture method thereof. The avionic full-duplex Ethernet communication cable comprises conductors. Each conductor is wrapped in an insulated layer to form a core wire. The core wires are wrapped in a shielding layer and a sheath. The multiple core wires form a star twisted wire. The shielding layer is a double-layer shielding woven layer. The insulated layer is a foaming FEP layer. The sheath is a FEP layer. The inner layer of the double-layer shielding woven layer is a silver-plated copper flat wire woven layer. The outer layer of the double-layer shielding woven layer is a silver-plated copper round wire woven layer. The avionic full-duplex Ethernet communication cable uses the multi-core star twisted wire, uses the foaming FEP layer as the insulated layer, uses the double-layer shielding woven layer as the shielding layer, has a high transmission capability, light weight, anti-interference performance, low loss, high temperature resistance, and an excellent shielding property, and may solve problems of low bus transmission speed, narrow bandwidth, and heavy weight of a conventional avionic cable.
Description
Technical field
The present invention relates to a kind of cable and preparation method thereof, particularly relate to a kind of avionic full-duplex ethernet communication cable and preparation method thereof.
Background technology
Along with the continuous increase of facility such as flight key project and passenger entertainment etc., avionics system from synthesization towards centered by information exchange, the Deep Development of high integrity, the demand connected Ultrahigh speed data and transmit is growing, needs the bus broadband rolled up on aircraft.Avionic full-duplex communication Ethernet exchange (AFDX) has outstanding feature as the representative of the civilian data/address bus of a new generation compared to traditional civil avionics bus ARINC429, ARINC629, IEEE802.3.The transmission bandwidth of ARINC429 only has 100KHz, can not satisfy the demands far away, and the involving great expense of ARINC629, aircratfsman is difficult to accept; Although IEEE802.3 can provide at a high speed and low cost bus, business application is extensively upper, and it is the Ethernet of semiduplex mode, probably occurs a large amount of data delays in use procedure.AFDX then provides a Star topology up to 24 terminal systems and connects the full-duplex communication Ethernet of a switch to other switch internal networks, in order to improve avionics system traffic rate, meet the demand of modern Aviation to information transmission and information management.But the transmission rate of AFDX is bandwidth 100MHz, far away higher than the Avionics data bus of other types.The cable of traditional aviation electronic bus only meets the broadband between 100KHz ~ 1MHz, and preponderance, capability of electromagnetic shielding is not good.Therefore, development one has high speed transmission abilities, lightweight, and the cable simultaneously with performances such as good environment resistant, low-power consumption, electromagnetic wave shieldings is very important with the instructions for use meeting AFDX.Research and development are current focuses for the special cable with premium properties that can be applicable to AFDX.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of avionic full-duplex ethernet communication cable and preparation method thereof, there is high-transmission ability, lightweight, anti-interference, low-loss, high temperature resistant and have excellent shielding properties, can solve conventional avionics bus transfer underspeed, bandwidth not and the difficult problem such as cable is overweight.
The present invention solves the problems of the technologies described above the technical scheme adopted to be to provide a kind of avionic full-duplex ethernet communication cable, comprise conductor, described conductor is coated with insulating barrier and forms heart yearn, described heart yearn is coated with screen and sheath, wherein, the number of described heart yearn is many and forms star quad stranding line, and described screen is double layer screen braid, described insulating barrier is expansion type perfluoroethylene-propylene layer, and described sheath is perfluoroethylene-propylene layer.
Above-mentioned avionic full-duplex ethernet communication cable, wherein, described conductor is four silver-plated copper stranded wires, every root silver-plated copper stranded wire forms heart yearn together with the insulating barrier of its outer cladding, four heart yearns match between two to twist together and form four-core star quad stranding line, and described four-core star quad stranding line is coated with polytetrafluoroethylene film.
Above-mentioned avionic full-duplex ethernet communication cable, wherein, the nexine of described double layer screen braid is silver-plated copper lenticular wire braid, and skin is silver-plated circular copper wire braid.
The present invention also provides a kind of preparation method of above-mentioned avionic full-duplex ethernet communication cable for solving the problems of the technologies described above, comprise the steps:
A) first silver-coated copper wire is carried out multicore concentric stranding on stranding machine, obtain silver-plated copper stranded wire;
B) silver-plated copper stranded wire is specially joined high-temperature physics foam extrusion machine head by fluoride, make the silver-plated copper stranded wire outer cladding expansion type perfluoroethylene-propylene layer after extruding obtain heart yearn, extruder temperature scope is at 290 DEG C ~ 340 DEG C; Vacuum degree is 10% ~ 30%, gas injection pressure 100Bar ~ 300Bar, hauling speed 70m/min ~ 150m/min;
C) two pairs of heart yearns are obtained four-core star quad stranding line by carrying out star quad stranding in high velocity star winch, wherein hauling speed is 3m/min ~ 10m/min, and laying up pitch is 30mm ~ 50mm;
D) after four-core star quad stranding line outer cladding polytetrafluoroethylene film, put in high-speed knitter and weave silver-plated copper lenticular wire and silver-plated circular copper wire formation double layer screen braid successively;
E) form sheath in double layer screen braid outer cladding after finally being extruded by high temperature extrusion machine by the heart yearn after braiding, temperature range is at 260 DEG C ~ 390 DEG C; Hauling speed 50m/min ~ 100m/min.
The present invention contrasts prior art following beneficial effect: avionic full-duplex ethernet communication cable provided by the invention and preparation method thereof, adopt multicore star quad stranding line and double layer screen braid, coordinate expansion type perfluoroethylene-propylene layer as insulating barrier, there is high-transmission ability, lightweight, anti-interference, low-loss, high temperature resistant and have excellent shielding properties, can solve conventional avionics bus transfer underspeed, bandwidth not and the difficult problem such as cable is overweight.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of avionic full-duplex ethernet communication cable of the present invention.
In figure:
1 conductor 2 insulating barrier 3 polytetrafluoroethylene film
Silver-plated circular copper wire braid 6 sheath of 4 silver-plated copper lenticular wire braid 5
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the cross section structure schematic diagram of avionic full-duplex ethernet communication cable of the present invention.
Refer to Fig. 1, avionic full-duplex ethernet communication cable provided by the invention, comprise conductor 1, described conductor 1 is coated with insulating barrier 2 and forms heart yearn, and described heart yearn is coated with screen and sheath 6, wherein, the number of described heart yearn is many and forms star quad stranding line, described screen is double layer screen braid, and described insulating barrier 2 is expansion type perfluoroethylene-propylene layer, and described sheath 6 is perfluoroethylene-propylene layer.
Avionic full-duplex ethernet communication cable provided by the invention, described conductor 1 is four silver-plated copper stranded wires, every root silver-plated copper stranded wire forms heart yearn together with the insulating barrier of its outer cladding, four heart yearns match between two to twist together and form four-core star quad stranding line, and described four-core star quad stranding line is coated with polytetrafluoroethylene film; The nexine of described double layer screen braid is silver-plated copper lenticular wire braid 4, and skin is silver-plated circular copper wire braid 5.
The present invention also provides a kind of preparation method of above-mentioned avionic full-duplex ethernet communication cable, and preparation method of the present invention comprises the steps:
A) first silver-coated copper wire is carried out multicore concentric stranding on stranding machine, obtain silver-plated copper stranded wire;
B) silver-plated copper stranded wire is specially joined high-temperature physics foam extrusion machine head by fluoride, make the silver-plated copper stranded wire outer cladding expansion type perfluoroethylene-propylene layer after extruding obtain heart yearn, extruder temperature scope is at 290 DEG C ~ 340 DEG C; Vacuum degree is 10% ~ 30%, gas injection pressure 100Bar ~ 300Bar, hauling speed 70m/min ~ 150m/min.
C) two pairs of heart yearns are obtained four-core star quad stranding line by carrying out star quad stranding in high velocity star winch, wherein hauling speed is 3m/min ~ 10m/min, and laying up pitch is 30mm ~ 50mm;
D) after four-core star quad stranding line outer cladding polytetrafluoroethylene film, put in high-speed knitter and weave silver-plated copper lenticular wire and silver-plated circular copper wire formation double layer screen braid successively;
E) form sheath in double layer screen braid outer cladding after finally being extruded by high temperature extrusion machine by the heart yearn after braiding, temperature range is at 260 DEG C ~ 390 DEG C; Hauling speed 50m/min ~ 100m/min.
The properties table of AFDX-100 ohm star-quad cable prepared by the present invention is as follows:
The mechanism that the present invention realizes the characteristics such as high-transmission ability and excellent shielding properties is as follows: one, improve transmission speed aspect, as everyone knows, insulation is the medium of Signal transmissions, require that materials and structures makes the alap loss of cable on selecting as far as possible, ensure enough mechanical strengths, the effective dielectric constant of material determines the quality of signal transmission speed in media as well simultaneously.Therefore the present invention adopts and specially joins high-temperature physics foam extrusion machine and carry out to perfluoroethylene-propylene the insulating barrier that physical blowing process obtains, and the insulating barrier effective dielectric constant obtained is little, achieves the high-speed transfer of signal.Two, in reducing the wastage, first the dielectric loss angle tangent tg δ of foaming insulation layer is little, and loss reduces, and further, the present invention adopts the mode of quad star quad stranding to process heart yearn, matches between two between transmission heart yearn.Reduce the mutual interference in magnetic field on the one hand, reduce the wastage; Also reduce the size of cable on the other hand, reduce the material usage of screen and overcoat, thus reach the object of loss of weight.Three, in raising shielding properties, the present invention adopts the mode woven shield of silver-plated copper lenticular wire and silver-plated circular copper wire bilayer, and the screen transfger impedance that this mode obtains is low, and pliability is good.Double layer screen mode make cable have lightweight, decay low, the feature such as shielding properties is high, flexibility is good.In addition, the present invention adopts perfluoroethylene-propylene as lagging material, its Long-Time Service temperature-60 ~ 200 DEG C, has remarkable resistance to chemical corrosion, electrical property and resistance to elevated temperatures.
Avionic full-duplex ethernet communication cable provided by the invention and preparation method thereof, adopt multicore star quad stranding line and double layer screen braid, coordinate expansion type perfluoroethylene-propylene layer as insulating barrier, concrete advantage is as follows: 1, transmission speed is fast: the effective dielectric constant of foaming perfluoroethylene-propylene is between 1.4 ~ 1.6, between the perfluoroethylene-propylene 2.01 ~ 2.05 without foaming, improve transmission speed, prevent the generation of cross-talk and delay inequality, meet the instructions for use of ADFX data/address bus.2, advantages of good shielding performance: silver-plated copper lenticular wire and silver-plated circular copper wire double layer screen reduce transfger impedance, are also that signal not easily spreads, ensures the high-quality transmission of signal.3, high temperature resistant: can within the scope of-60 ~ 200 DEG C Long-Time Service.4, lightweight: cable weight is not more than 75g/m.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.
Claims (4)
1. an avionic full-duplex ethernet communication cable, comprise conductor, described conductor is coated with insulating barrier and forms heart yearn, described heart yearn is coated with screen and sheath, it is characterized in that, the number of described heart yearn is many and forms star quad stranding line, and described screen is double layer screen braid, described insulating barrier is expansion type perfluoroethylene-propylene layer, and described sheath is perfluoroethylene-propylene layer.
2. avionic full-duplex ethernet communication cable as claimed in claim 1, it is characterized in that, described conductor is four silver-plated copper stranded wires, every root silver-plated copper stranded wire forms heart yearn together with the insulating barrier of its outer cladding, four heart yearns match between two to twist together and form four-core star quad stranding line, and described four-core star quad stranding line is coated with polytetrafluoroethylene film.
3. avionic full-duplex ethernet communication cable as claimed in claim 1, it is characterized in that, the nexine of described double layer screen braid is silver-plated copper lenticular wire braid, and skin is silver-plated circular copper wire braid.
4. a preparation method for avionic full-duplex ethernet communication cable as claimed in claim 1, is characterized in that, comprise the steps:
A) first silver-coated copper wire is carried out multicore concentric stranding on stranding machine, obtain silver-plated copper stranded wire;
B) silver-plated copper stranded wire is specially joined high-temperature physics foam extrusion machine head by fluoride, make the silver-plated copper stranded wire outer cladding expansion type perfluoroethylene-propylene layer after extruding obtain heart yearn, extruder temperature scope is at 290 DEG C ~ 340 DEG C; Vacuum degree is 10% ~ 30%, gas injection pressure 100Bar ~ 300Bar, hauling speed 70m/min ~ 150m/min;
C) two pairs of heart yearns are obtained four-core star quad stranding line by carrying out star quad stranding in high velocity star winch, wherein hauling speed is 3m/min ~ 10m/min, and laying up pitch is 30mm ~ 50mm;
D) after four-core star quad stranding line outer cladding polytetrafluoroethylene film, put in high-speed knitter and weave silver-plated copper lenticular wire and silver-plated circular copper wire formation double layer screen braid successively;
E) form sheath in double layer screen braid outer cladding after finally being extruded by high temperature extrusion machine by the heart yearn after braiding, temperature range is at 260 DEG C ~ 390 DEG C; Hauling speed 50m/min ~ 100m/min.
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| CN105632634A (en) * | 2016-04-11 | 2016-06-01 | 湖南华菱线缆股份有限公司 | Wire and cable for aerospace |
| CN105788706A (en) * | 2016-04-25 | 2016-07-20 | 中国电子科技集团公司第二十三研究所 | Aerospace-used star quad communication cable and manufacturing method thereof |
| CN108376579A (en) * | 2018-04-23 | 2018-08-07 | 东莞金信诺电子有限公司 | A kind of low-loss high-speed cable and flat type cable |
| CN109859896A (en) * | 2019-04-23 | 2019-06-07 | 优易电缆(张家港)有限公司 | A kind of multiply enameled wire conductor composite cable |
| CN110010268A (en) * | 2019-04-15 | 2019-07-12 | 东莞市宾澄电子有限公司 | A kind of silver wire and the mixed conducting wire and preparation method thereof being stranding into of copper wire |
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Application publication date: 20151223 |