CN111145957A - Photoelectric composite data bus and preparation method thereof - Google Patents
Photoelectric composite data bus and preparation method thereof Download PDFInfo
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- CN111145957A CN111145957A CN202010034759.7A CN202010034759A CN111145957A CN 111145957 A CN111145957 A CN 111145957A CN 202010034759 A CN202010034759 A CN 202010034759A CN 111145957 A CN111145957 A CN 111145957A
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/22—Cables including at least one electrical conductor together with optical fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
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- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H01B13/06—Insulating conductors or cables
- H01B13/08—Insulating conductors or cables by winding
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
- H01B3/445—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds from vinylfluorides or other fluoroethylenic compounds
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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Abstract
The invention discloses a photoelectric composite data bus and a preparation method thereof, wherein the photoelectric composite data bus comprises at least three silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier; a first insulating layer is wrapped outside the silver-plated copper wire stranded conductor; a second insulating layer is wrapped outside the single-mode optical fiber transmission carrier; the silver-plated copper wire stranded conductor is circumferentially stranded outside the single-mode optical fiber transmission carrier to form a photoelectric composite cable core; a fastening layer is wound and wrapped outside the photoelectric composite cable core; a shielding layer is arranged outside the fastening layer; and the photoelectric composite data bus is obtained by wrapping the fastening layer, the shielding layer and the outer sheath in an extruding way. The invention solves the problems that photoelectric signals can not be transmitted simultaneously, and the photoelectric signals can not resist high temperature and low temperature, achieves the technical effects that the bus can transmit the photoelectric signals simultaneously, can resist high and low temperatures of-65 ℃ to +200 ℃, and can meet the use requirement of transmitting photoelectric multi-path signals in an aerospace craft task and control system.
Description
Technical Field
The invention relates to the technical field of signal transmission cables for aerospace, in particular to a photoelectric composite data bus and a preparation method thereof.
Background
The photoelectric data bus is a high-speed serial bus and an optical fiber signal path transmission carrier, and a photoelectric composite data bus communication interface is also adopted to transmit complex, diversified and efficient video and image signals in the development process of the currently newly developed invisible fighter in China; the photoelectric composite data bus is developed, so that the photoelectric composite data bus can meet the harsh military environments of other field operations, water surfaces and the like in a wide temperature range. However, in the existing bus signal transmission, firstly, photoelectric signals cannot be transmitted in the same path at the same time, and secondly, the optical signals cannot resist high temperature and low temperature.
Disclosure of Invention
The invention discloses a photoelectric composite data bus and a preparation method thereof, aiming at solving the problems that photoelectric signals of the bus in the prior art can not be transmitted simultaneously, and can not resist high temperature and low temperature, the photoelectric composite data bus can meet the requirements of other basic electrical performance and mechanical performance indexes, can simultaneously transmit photoelectric signals, can resist high and low temperatures of-65 ℃ to +200 ℃, and can meet the technical effect of transmitting photoelectric multi-path signals in aerospace craft tasks and control systems.
In order to achieve the purpose, the invention provides the following technical scheme:
a photoelectric composite data bus comprises at least three silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier; a first insulating layer is wrapped outside the silver-plated copper wire stranded conductor; a second insulating layer is wrapped outside the single-mode optical fiber transmission carrier; the single-mode optical fiber transmission carrier is circumferentially stranded with the silver-plated copper wire stranded conductor to form a photoelectric composite cable core; a fastening layer is wound and wrapped outside the photoelectric composite cable core; a shielding layer is arranged outside the fastening layer; an outer sheath is extruded outside the shielding layer.
Further, the first insulating layer is a microporous polytetrafluoroethylene film; the second insulating layer is a white raw material polytetrafluoroethylene film.
Further, the fastening layer is a microporous polytetrafluoroethylene film; the shielding layer is formed by weaving two layers of silver-plated copper wires.
Furthermore, the first insulating layer adopts two layers of microporous polytetrafluoroethylene films with the specification of width of 6mm multiplied by thickness of 0.076 mm; the dielectric constant of the microporous polytetrafluoroethylene film is 1.40-1.45; the second insulating layer adopts white raw material polytetrafluoroethylene film that the specification is 1.5mm wide x 0.05mm thick to wrap insulating around, white raw material polytetrafluoroethylene film longitudinal tensile strength is greater than 10 MPa.
Further, the first insulating layer is respectively distinguished by adopting four colors of red, yellow, blue and green; the second insulating layer is white, the single-mode optical fiber transmission carrier is arranged at the center and is twisted, the twisting direction is right, and the twisting pitch-diameter ratio is 12 times;
the fastening layer is formed by wrapping a microporous polytetrafluoroethylene film with the specification of width of 12mm multiplied by thickness of 0.102mm outside the photoelectric composite cable core, and the dielectric constant of the microporous polytetrafluoroethylene film is 1.40-1.45;
the shielding layer is two layers of silver-plated copper wires with monofilament diameter of 0.10mm, and the weaving density of each layer is 92%; the outer sheath is fluoroplastic with the thickness of 0.35 mm.
Furthermore, the photoelectric composite data bus adopts four silver-plated copper wire stranded conductors for electric signal transmission and a single-mode optical fiber transmission carrier with the outer diameter of 0.254 +/-0.02 mm for optical signal transmission;
the silver-plated copper wire stranded conductor adopts a single conductor structure with the structure of 19/0.127mm and the silver layer thickness of 1.5mm, the sorting structure is (1+6) +12, and the inner layer and the outer layer are concentrically twisted in the positive direction and the negative direction; the pitch of the inner layer is 6 +/-1 mm, and the inner layer is twisted in the right direction; the outer layer pitch is 12mm +/-2 mm, and left-hand twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor after being stranded is 0.63 +/-0.05 mm; the pitch-diameter ratio of the stranded conductor is controlled to be 16-20 times.
In order to better implement the invention, the invention provides a preparation method of a photoelectric composite data bus, which specifically comprises the following steps:
preparing a silver-plated copper wire stranded conductor: sequentially arranging single conductors from inside to outside by using a wire bundling machine, and twisting the silver-plated copper wire conductors from inside to outside in a positive and negative direction;
wrapping a first insulating layer: wrapping a microporous polytetrafluoroethylene film with the width of 6mm multiplied by the thickness of 0.076mm with a silver-plated copper wire stranded conductor by a horizontal double-head wrapping machine, and forming a first insulating layer by wrapping two layers;
wrapping a second insulating layer: winding a raw material polytetrafluoroethylene film with the width of 1.5mm multiplied by the thickness of 0.05mm on the outer wall of a single-mode optical fiber transmission carrier by a vertical double-head winding machine to form a second insulating layer;
preparing the photoelectric composite cable core: marking the insulated at least three silver-plated copper wire stranded conductors and the single-mode optical fiber transmission carrier by colors, and then stranding the conductors by a cable carrying machine; during twisting, the single-mode optical fiber transmission carrier is placed in the center of the silver-plated copper wire stranded conductor, and the twisting direction is twisted rightwards to form the photoelectric composite cable core;
wrapping a fastening layer: wrapping the outer wall of the photoelectric composite cable core with a microporous polytetrafluoroethylene film with the width of 12mm multiplied by the thickness of 0.102mm by a horizontal double-head wrapping machine to form a fastening layer;
weaving a shielding layer: weaving silver-plated copper wires on the outer wall of the fastening layer through a 16-spindle weaving machine, and weaving 2 layers to form a shielding layer;
the outer sheath is extruded: and extruding and coating a layer of soluble polytetrafluoroethylene with the thickness of 0.35mm outside the woven shielding layer by a 40-type high-temperature extruder to form the protective sleeve.
Furthermore, the silver-plated copper wire stranded conductor adopts a single conductor structure with the structure of 19/0.127mm and the silver layer thickness of 1.5mm, the sequencing structure is (1+6) +12, and the inner layer and the outer layer are concentrically twisted in the positive direction and the negative direction; the pitch of the inner layer is 6 +/-1 mm, and the inner layer is twisted in the right direction; the outer layer pitch is 12mm +/-2 mm, and left-hand twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor is 0.63 +/-0.05 mm after being stranded; controlling the pitch-diameter ratio of the stranded conductor to be 16-20 times;
the first layer of the first insulating layer is wrapped in a right direction, wherein the wrapping overlapping rate is 63% -66%, the pitch is 3.6 +/-0.1 mm, and the tension is 8N; the second layer of the first insulating layer is lapped in a left direction at the lap overlapping rate of 48% -51%, the pitch of 4.3 +/-0.1 mm and the tension of 8N; the outer diameter is 1.25 mm plus or minus 0.1mm after wrapping;
the second insulating layer is of a one-layer structure, the lapping overlapping rate is 63% -66%, the pitch is 1.0 +/-0.1 mm, the tension is 3N, the second insulating layer is lapped in the right direction, and the outer diameter is 0.5 +/-0.1 mm after lapping.
Furthermore, four silver-plated copper wire stranded conductors are respectively wrapped by first insulating layers in red, yellow, blue and green colors; the second insulating layer is wrapped in white;
the stranding pitch of the photoelectric composite cable core is 35 +/-3 mm, and the stranding outer diameter is 3.05 +/-0.2 mm;
the fastening layer is wrapped at the wrapping overlapping rate of 48% -51%, the number of layers is one, the pitch is 7.2 +/-0.1 mm, the tension is 12N, the left direction is wrapped, and the outer diameter is 3.4 +/-0.2 mm after the wrapping.
Furthermore, the inner layer of the shielding layer (7) has a weaving structure of 16 multiplied by 7/0.1mm, a weaving pitch of 10 +/-1 mm, the outer layer has a weaving structure of 16 multiplied by 8/0.1mm, a weaving pitch of 12 +/-1 mm and a weaving outer diameter of 4.3 +/-0.2 mm;
the extrusion temperature of the sheath sequentially passes through five temperature zones, wherein the extrusion temperature zones are respectively 300 +/-10 ℃, 380 +/-10 ℃, 400 +/-10 ℃, 420 +/-10 ℃, 400 +/-10 ℃, the extrusion speed is 45 rad/min-50 rad/min, the traction speed is 25 m/min-30 m/min, and the extrusion outer diameter is 5.0 +/-0.2 mm.
Compared with the prior art, the invention has the following technical effects and advantages:
1. the invention relates to a photoelectric composite data bus, which comprises at least three silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier; a first insulating layer is wrapped outside the silver-plated copper wire stranded conductor; a second insulating layer is wrapped outside the single-mode optical fiber transmission carrier; the single-mode optical fiber transmission carrier is circumferentially stranded with the silver-plated copper wire stranded conductor to form a photoelectric composite cable core; a fastening layer is wound and wrapped outside the photoelectric composite cable core; a shielding layer is arranged outside the fastening layer; an outer sheath is extruded outside the shielding layer.
The bus transmission carrier adopts a plurality of silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier, the silver-plated copper wire stranded conductor is insulated by two layers of microporous polytetrafluoroethylene films, the single-mode optical fiber transmission carrier is externally wrapped by a white raw material polytetrafluoroethylene film, the photoelectric transmission performance is good, and transmitted optical signals and transmitted electric signals are not influenced mutually.
The photoelectric composite data bus fully considers the requirements on flexibility and stability in the design process, so that the conductor twisting pitches are twisted by adopting pitches with large pitch-diameter ratio, the pitch-diameter ratio of the silver-plated copper wire twisted conductor is controlled to be 16-20 times, the insulating layers are all in wrapping structures, and the flexibility of the bus is obviously improved; in order to avoid the situation that the wire cores of the bus are moved and dislocated in the using process, the pitch-diameter ratio of the photoelectric composite cable core is controlled to be 12 times during stranding, and a fastening layer is arranged outside the whole cable core, so that the phenomenon that the wire cores of the cable are dislocated and moved under the frequent moving occasion is avoided, and the transmission stability of the cable is ensured.
The transmission carrier of the bus adopts silver-plated copper wires and single-mode optical fiber transmission carriers, the insulating layer, the fastening layer and the outer sheath adopt fluorine-containing polymers, and the shielding layer adopts silver-plated copper wires, so that the problems that photoelectric signals of the bus cannot be transmitted simultaneously, cannot resist high temperature and low temperature are solved, the requirements of other basic electrical performance and mechanical performance indexes are met, the bus can simultaneously transmit the photoelectric signals, the high and low temperatures of-65 ℃ to +250 ℃ can be met, and the technical effect of transmitting photoelectric multi-path signals in aerospace craft tasks and control systems can be met.
2. The invention relates to a preparation method of a photoelectric composite data bus, which specifically comprises the following steps: sequentially arranging single conductors from inside to outside by using a wire bundling machine, and twisting the silver-plated copper wire conductors from inside to outside in a positive and negative direction; the method comprises the following steps that a micro-porous polytetrafluoroethylene film is wrapped with silver-plated copper wire stranded conductors through a horizontal double-head wrapping machine, and a first insulating layer is formed by two layers of wrapping; wrapping the outer wall of the single-mode optical fiber transmission carrier with a raw polytetrafluoroethylene film by using a vertical double-head wrapping machine to form a second insulating layer; marking the insulated at least three silver-plated copper wire stranded conductors and the single-mode optical fiber transmission carrier by colors, and then stranding the conductors by a cable carrying machine; during twisting, the single-mode optical fiber transmission carrier is placed in the center of the silver-plated copper wire stranded conductor, and the twisting direction is twisted rightwards to form the photoelectric composite cable core; wrapping the outer wall of the photoelectric composite cable core with the microporous polytetrafluoroethylene film by a horizontal double-head wrapping machine to form a fastening layer; weaving silver-plated copper wires on the outer wall of the fastening layer through a weaving machine, and weaving 2 layers to form a shielding layer; and extruding and coating a layer of soluble polytetrafluoroethylene outside the woven shielding layer by a high-temperature extruder to form the protective sleeve.
The invention adopts at least three silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier as the innermost layer transmission carrier; the method comprises the steps that a first insulating layer is wrapped outside a silver-plated copper wire stranded conductor by adopting a microporous polytetrafluoroethylene film in a wrapping mode, the colors of the first insulating layer are red, yellow, blue and green, a second insulating layer is wrapped outside a single-mode optical fiber transmission carrier by adopting a white raw material polytetrafluoroethylene film, 5 kinds of red, yellow, blue, green and white insulating wire cores are twisted into a photoelectric composite cable core, a layer of microporous polytetrafluoroethylene film is wrapped outside the cable core to serve as a fastening layer, two layers of silver-plated copper wires are woven outside the fastening layer to serve as a shielding layer, fluoroplastics are extruded outside the shielding layer to serve as an outer sheath to obtain a photoelectric composite data bus, the conductor twisting pitches are twisted by adopting pitches with large pitch-diameter ratios, the pitch-diameter ratio of the silver-plated copper wire stranded conductor is controlled to be 16-20 times, the insulating layers are all; in order to avoid the situation that the wire cores of the bus are moved and dislocated in the using process, the pitch-diameter ratio of the photoelectric composite cable core is controlled to be 12 times during stranding, and a fastening layer is arranged outside the whole cable core, so that the phenomenon that the wire cores of the cable are dislocated and moved under the frequent moving occasion is avoided, and the transmission stability of the cable is ensured. The problems that photoelectric signals cannot be transmitted simultaneously, and the high temperature and low temperature cannot be resisted are solved, the technical effects that the bus can simultaneously transmit the photoelectric signals, the high and low temperatures of-65 ℃ to +200 ℃ can be resisted, and the photoelectric multi-path signal transmission and use in an aerospace craft task and control system can be met.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Reference numerals:
1. the cable comprises a silver-plated copper alloy stranded conductor, 2, a first insulating layer, 2.1, a first layer of the first insulating layer, 2.2, a second layer of the first insulating layer, 3, a single-mode optical fiber transmission carrier, 4, a second insulating layer, 5, a photoelectric composite cable core, 6, a fastening layer, 7, a shielding layer, 8 and an outer sheath.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Description of the drawings: it is obvious that the invention is primarily intended to provide a conception, and that all details of technical features may not be fully elaborated, and that no disclosure is given that is within the knowledge and height of a person skilled in the art.
The operation principles of wrapping, weaving, twisting, extruding and the like, which are not described in detail in this embodiment, all adopt the existing operation technology.
Example 1, described in connection with figure 1.
A photoelectric composite data bus is characterized by comprising at least three silver-plated copper wire stranded conductors 1 and a single-mode optical fiber transmission carrier 3; a first insulating layer 2 is wound outside the silver-plated copper wire stranded conductor 1; a second insulating layer 4 is wrapped outside the single-mode optical fiber transmission carrier 3; the periphery of the single-mode optical fiber transmission carrier 3 is stranded with the silver-plated copper wire stranded conductor 1 to form a photoelectric composite cable core 5; a fastening layer 6 is wound and coated outside the photoelectric composite cable core 5; a shielding layer 7 is arranged outside the fastening layer 6; and an outer sheath 8 is extruded outside the shielding layer 7.
The photoelectric composite data bus of the embodiment adopts three silver-plated copper wire stranded conductors for electric signal transmission and a single-mode optical fiber transmission carrier with the outer diameter of 0.254 +/-0.02 mm for optical signal transmission. The silver-plated copper wire stranded conductor is formed by stranding 19 single conductors with the diameter of 0.127mm and the thickness of a silver layer of 1.5mm, the arrangement mode of the 19 single conductors is (1+6) +12, namely six conductors are circumferentially stranded on the outer side of a middle conductor to form an inner layer, twelve conductors are circumferentially stranded on the outer side of the inner layer to form an outer layer, and the inner layer and the outer layer are concentrically and positively and negatively stranded; the pitch of the inner layer is 6 +/-1 mm, and the inner layer is twisted in the right direction; the outer layer pitch is 12mm +/-2 mm, and left-hand twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor is 0.63 +/-0.05 mm after being stranded; controlling the pitch-diameter ratio of the stranded conductor to be 16-20 times, specifically, controlling the pitch-diameter ratio of the inner layer to be 16 times and controlling the pitch-diameter ratio of the outer layer to be 20 times;
the silver-plated copper wire stranded conductor is wrapped by three first insulating layers in red, yellow, blue and three colors; the second insulating layer is wrapped in white;
the inner layer weaving structure of the shielding layer is formed by weaving 16 silver-plated copper wires with the width of 7mm and the thickness of 0.1mm, the weaving pitch is 10 +/-1 mm, the outer layer weaving structure is formed by weaving 16 silver-plated copper wires with the width of 8mm and the thickness of 0.1mm, the weaving pitch is 12 +/-1 mm, and the weaving outer diameter is 4.3 +/-0.2 mm;
the bus transmission carrier adopts a plurality of silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier, the silver-plated copper wire stranded conductors are insulated by adopting two layers of microporous polytetrafluoroethylene films, the single-mode optical fiber transmission carrier is wrapped and insulated by adopting a white raw material polytetrafluoroethylene film, the photoelectric transmission performance is good, and transmitted optical signals and electric signals are not influenced mutually;
the photoelectric composite data bus fully considers the requirements on flexibility and stability in the design process, so that the conductor twisting pitches are twisted by adopting pitches with large pitch-diameter ratio, the pitch-diameter ratio of the silver-plated copper wire twisted conductor is controlled to be 16-20 times, the insulating layers are all in wrapping structures, and the flexibility of the bus is obviously improved; in order to avoid the situation that the wire cores of the bus are moved and dislocated in the using process, the pitch-diameter ratio of the photoelectric composite cable core is controlled to be 12 times during stranding, and a fastening layer is arranged outside the whole cable core, so that the phenomenon that the wire cores of the cable are dislocated and moved under the frequent moving occasion is avoided, and the transmission stability of the cable is ensured.
The transmission carrier of the bus adopts silver-plated copper wires and single-mode optical fiber transmission carriers, the insulating layer, the fastening layer and the outer sheath adopt fluorine-containing polymers, and the shielding layer adopts silver-plated copper wires, so that the problems that photoelectric signals of the bus cannot be transmitted simultaneously, and the bus is high-temperature resistant and low-temperature resistant are solved, the requirements of other basic electrical performance and mechanical performance indexes are met, the bus can simultaneously transmit the photoelectric signals, the high and low temperatures of-65 ℃ to +250 ℃ are met, and the technical effect of transmitting photoelectric multi-path signals in an aerospace vehicle task and control system can be met.
Example 2, described in connection with figure 1.
To further clarify the technical effects of the optoelectronic composite data bus of the present invention, a method for preparing the product of example 1 is provided:
a preparation method of a photoelectric composite data bus specifically comprises the following steps:
step one, preparing a silver-plated copper wire stranded conductor 1: sequentially arranging single conductors from inside to outside by using a wire bundling machine, and twisting the silver-plated copper wire conductors from inside to outside in a positive and negative direction;
step two, wrapping the first insulating layer 2: a microporous polytetrafluoroethylene film with the width of 6mm multiplied by the thickness of 0.076mm is wrapped with a silver-plated copper wire stranded conductor 1 by a horizontal double-head wrapping machine, and a first insulating layer 2 is formed by wrapping two layers;
step three, wrapping a second insulating layer 4: winding a raw material polytetrafluoroethylene film with the width of 1.5mm multiplied by the thickness of 0.05mm on the outer wall of a single-mode optical fiber transmission carrier 3 by a vertical double-head winding machine to form a second insulating layer 4;
step four, preparing the photoelectric composite cable core 5: marking the three insulated silver-plated copper wire stranded conductors 1 and the single-mode optical fiber transmission carrier 3 by colors, and then stranding the conductors by a cable carrier; during twisting, the single-mode optical fiber transmission carrier 3 is placed in the center of the silver-plated copper wire stranded conductor 1, and the twisting direction is twisted in the right direction to form a photoelectric composite cable core 5;
step five, wrapping a fastening layer 6: wrapping the outer wall of the photoelectric composite cable core 5 with a microporous polytetrafluoroethylene film with the width of 12mm multiplied by the thickness of 0.102mm by a horizontal double-head wrapping machine to form a fastening layer 6;
step six, a shielding layer 7: weaving silver-plated copper wires on the outer wall of the fastening layer 6 through a 16-spindle weaving machine, and weaving 2 layers to form a shielding layer 7;
seventhly, extruding and wrapping an outer sheath 8: a layer of soluble polytetrafluoroethylene with the thickness of 0.35mm is extruded outside the woven shielding layer through a 40-type high-temperature extruder to form the protective sleeve 8.
Furthermore, the silver-plated copper wire stranded conductor 1 in the first step is formed by stranding 19 single conductors with the diameter of 0.127mm and the thickness of a silver layer of 1.5mm, the arrangement mode of the 19 single conductors is (1+6) +12, namely six conductors are stranded on the outer side of one middle conductor in the circumferential direction to form an inner layer, twelve conductors are stranded on the outer side of the inner layer in the circumferential direction to form an outer layer, and the inner layer and the outer layer are stranded in a concentric positive and negative direction; the pitch of the inner layer is 5mm, and the inner layer is twisted in the right direction; the outer layer pitch is 10mm, and left-hand twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor 1 is 0.58mm after being stranded; controlling the pitch-diameter ratio of the stranded conductor to be 16-20 times, specifically, controlling the pitch-diameter ratio of the inner layer to be 16 times and controlling the pitch-diameter ratio of the outer layer to be 20 times;
the lapping overlapping rate of the first layer of the first insulating layer 2 in the second step is 63%, the pitch is 3.5mm, the tension is 8N, and the right-hand lapping is carried out; the second layer of the first insulating layer 2 is lapped in a left direction with the lapping overlapping rate of 48%, the pitch of 4.2mm and the tension of 8N; the outer diameter is 1.24mm after wrapping;
and step three, the second insulating layer 4 is of a one-layer structure, the lapping overlapping rate is 63%, the pitch is 0.9mm, the tension is 3N, the second insulating layer is lapped in the right direction, and the outer diameter is 0.4mm after lapping.
Further, the number of the silver-plated copper wire stranded conductors 1 in the first step is three, and the silver-plated copper wire stranded conductors are respectively wrapped by red, yellow and blue first insulating layers 2; the second insulating layer 4 is wrapped in white;
the stranding pitch of the photoelectric composite cable core 5 in the step four is 32mm, and the stranding outer diameter is 3.03 mm;
and step five, the fastening layer 6 is wrapped in a left direction with the wrapping overlapping rate of 48%, the number of layers of one layer and the pitch of 7.1mm, and the tension of 12N, and the outer diameter of the wrapped layer is 3.2 mm.
Further, the inner layer weaving structure of the shielding layer 7 in the sixth step is formed by weaving 16 silver-plated copper wires with the widths of 7mm and the thicknesses of 0.1mm, the weaving pitch is 9mm, the outer layer weaving structure of the shielding layer 7 is formed by weaving 16 silver-plated copper wires with the widths of 8mm and the thicknesses of 0.1mm, the weaving pitch is 11mm, and the weaving outer diameter is 4.1 mm;
and the extrusion temperature of the sheath sleeve 8 in the step seven sequentially passes through five temperature zones, wherein the extrusion temperature zones are 290 ℃, 370 ℃, 390 ℃, 410 ℃ and 390 ℃, the extrusion speed is 45rad/min, the traction speed is 25m/min, and the extrusion outer diameter is 4.8 mm.
The invention adopts three silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier as the innermost layer transmission carrier; the method comprises the steps that a first insulating layer is wrapped outside a silver-plated copper wire stranded conductor by adopting a microporous polytetrafluoroethylene film in a wrapping mode, the colors of the first insulating layer are red, yellow, blue and green, a second insulating layer is wrapped outside a single-mode optical fiber transmission carrier by adopting a white raw material polytetrafluoroethylene film, 5 kinds of red, yellow, blue, green and white insulating wire cores are twisted into a photoelectric composite cable core, a layer of microporous polytetrafluoroethylene film is wrapped outside the cable core to serve as a fastening layer, two layers of silver-plated copper wires are woven outside the fastening layer to serve as a shielding layer, fluoroplastics are extruded outside the shielding layer to serve as an outer sheath to obtain a photoelectric composite data bus, the conductor twisting pitches are twisted by adopting pitches with large pitch-diameter ratios, the pitch-diameter ratio of the silver-plated copper wire stranded conductor is controlled to be 16-20 times, and the insulating layers are all; in order to avoid the situation that the wire cores of the bus are moved and dislocated in the using process, the pitch-diameter ratio of the photoelectric composite cable core is controlled to be 12 times during stranding, and a fastening layer is arranged outside the whole cable core, so that the phenomenon that the wire cores of the cable are dislocated and moved under the frequent moving occasion is avoided, and the transmission stability of the cable is ensured. The problems that photoelectric signals cannot be transmitted simultaneously, and the photoelectric signals cannot resist high temperature and low temperature are solved, the bus can simultaneously transmit the photoelectric signals on the same path, can resist high and low temperatures of-65 ℃ to +200 ℃, and can meet the technical effect of transmitting photoelectric multi-path signals in an aerospace vehicle task and control system.
Example 3, described in connection with figure 1.
To further clarify the technical effects of the optoelectronic composite data bus of the present invention, a method for preparing the product of example 1 is provided:
a preparation method of a photoelectric composite data bus specifically comprises the following steps:
step one, preparing a silver-plated copper wire stranded conductor 1: sequentially arranging single conductors from inside to outside by using a wire bundling machine, and twisting the silver-plated copper wire conductors from inside to outside in a positive and negative direction;
step two, wrapping the first insulating layer 2: a microporous polytetrafluoroethylene film with the width of 6mm multiplied by the thickness of 0.076mm is wrapped with a silver-plated copper wire stranded conductor 1 by a horizontal double-head wrapping machine, and a first insulating layer 2 is formed by wrapping two layers;
step three, wrapping a second insulating layer 4: winding a raw material polytetrafluoroethylene film with the width of 1.5mm multiplied by the thickness of 0.05mm on the outer wall of a single-mode optical fiber transmission carrier 3 by a vertical double-head winding machine to form a second insulating layer 4;
step four, preparing the photoelectric composite cable core 5: marking the insulated four silver-plated copper wire stranded conductors 1 and the single-mode optical fiber transmission carrier 3 by colors, and then stranding the conductors by a cable carrier; during twisting, the single-mode optical fiber transmission carrier 3 is placed in the center of the silver-plated copper wire stranded conductor 1, and the twisting direction is twisted in the right direction to form a photoelectric composite cable core 5;
step five, wrapping a fastening layer 6: wrapping the outer wall of the photoelectric composite cable core 5 with a microporous polytetrafluoroethylene film with the width of 12mm multiplied by the thickness of 0.102mm by a horizontal double-head wrapping machine to form a fastening layer 6;
step six, a shielding layer 7: weaving silver-plated copper wires on the outer wall of the fastening layer 6 through a 16-spindle weaving machine, and weaving 2 layers to form a shielding layer 7;
seventhly, extruding and wrapping an outer sheath 8: a layer of soluble polytetrafluoroethylene with the thickness of 0.35mm is extruded outside the woven shielding layer through a 40-type high-temperature extruder to form the protective sleeve 8.
Furthermore, the silver-plated copper wire stranded conductor 1 in the first step is formed by stranding 19 single conductors with the diameter of 0.127mm and the thickness of a silver layer of 1.5mm, the arrangement mode of the 19 single conductors is (1+6) +12, namely six conductors are stranded on the outer side of one middle conductor in the circumferential direction to form an inner layer, twelve conductors are stranded on the outer side of the inner layer in the circumferential direction to form an outer layer, and the inner layer and the outer layer are stranded in a concentric positive and negative direction; the pitch of the inner layer is 5mm, and the inner layer is twisted in the right direction; the outer layer pitch is 10mm, and left-hand twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor 1 is 0.58mm after being stranded; controlling the pitch-diameter ratio of the stranded conductor to be 16-20 times, specifically, the pitch-diameter ratio of the inner layer is 18 times, and the pitch-diameter ratio of the outer layer is 20 times;
the lapping overlapping rate of the first layer of the first insulating layer 2 in the second step is 65%, the pitch is 3.5mm, the tension is 8N, and the right-hand lapping is carried out; the second layer of the first insulating layer 2 is lapped in a left direction with the lapping overlapping rate of 50%, the pitch of 4.2mm and the tension of 8N; the outer diameter is 1.24mm after wrapping;
and step three, the second insulating layer 4 is of a one-layer structure, the lapping overlapping rate is 65%, the pitch is 0.9mm, the tension is 3N, the second insulating layer is lapped in the right direction, and the outer diameter is 0.4mm after lapping.
Furthermore, four silver-plated copper wire stranded conductors 1 are wrapped by first insulating layers 2 of red, yellow, blue and green colors respectively; the second insulating layer 4 is wrapped in white;
the stranding pitch of the photoelectric composite cable core 5 in the step four is 32mm, and the stranding outer diameter is 3.03 mm;
and step five, the fastening layer 6 is lapped with 50% of lapping overlapping rate, one layer, 7.1mm of pitch, 12N of tension and 3.2mm of left-hand lapping, and the outer diameter is 3.2mm after lapping.
Further, the inner layer of the shielding layer 7 in the sixth step is formed by weaving 16 silver-plated copper wires with the widths of 7mm and the thicknesses of 0.1mm, the weaving pitch is 9mm, the outer layer of the shielding layer 7 is formed by weaving 16 silver-plated copper wires with the widths of 8mm and the thicknesses of 0.1mm, the weaving pitch is 11mm, and the weaving outer diameter is 4.1 mm;
the extrusion temperature of the sheath sleeve 8 in the step seven sequentially passes through five temperature zones, wherein the extrusion temperature zones are respectively 310 ℃, 370 ℃, 390 ℃, 430 ℃ and 410 ℃, the extrusion speed is 48rad/min, the traction speed is 28m/min, and the extrusion outer diameter is 4.8 mm.
The invention adopts four silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier as the innermost layer transmission carrier; the method comprises the steps that a first insulating layer is wrapped outside a silver-plated copper wire stranded conductor by adopting a microporous polytetrafluoroethylene film in a wrapping mode, the colors of the first insulating layer are red, yellow, blue and green, a second insulating layer is wrapped outside a single-mode optical fiber transmission carrier by adopting a white raw material polytetrafluoroethylene film, 5 kinds of red, yellow, blue, green and white insulating wire cores are twisted into a photoelectric composite cable core, a layer of microporous polytetrafluoroethylene film is wrapped outside the cable core to serve as a fastening layer, two layers of silver-plated copper wires are woven outside the fastening layer to serve as a shielding layer, fluoroplastics are extruded outside the shielding layer to serve as an outer sheath to obtain a photoelectric composite data bus, the conductor twisting pitches are twisted by adopting pitches with large pitch-diameter ratios, the pitch-diameter ratio of the silver-plated copper wires is controlled to be 16-20 times, and the insulating layers are all of; in order to avoid the situation that the wire cores of the bus are moved and dislocated in the using process, the pitch-diameter ratio of the photoelectric composite cable core is controlled to be 12 times during stranding, and a fastening layer is arranged outside the whole cable core, so that the phenomenon that the wire cores of the cable are dislocated and moved under the frequent moving occasion is avoided, and the transmission stability of the cable is ensured. The problems that photoelectric signals cannot be transmitted simultaneously, and the photoelectric signals cannot resist high temperature and low temperature are solved, the bus can simultaneously transmit the photoelectric signals on the same path, can resist high and low temperatures of-65 ℃ to +200 ℃, and can meet the technical effect of transmitting photoelectric multi-path signals in an aerospace vehicle task and control system.
Example 4, described in connection with figure 1.
To further clarify the technical effects of the optoelectronic composite data bus of the present invention, a method for preparing the product of example 1 is provided:
a preparation method of a photoelectric composite data bus specifically comprises the following steps:
step one, preparing a silver-plated copper wire stranded conductor 1: sequentially arranging single conductors from inside to outside by using a wire bundling machine, and twisting the silver-plated copper wire conductors from inside to outside in a positive and negative direction;
step two, wrapping the first insulating layer 2: a microporous polytetrafluoroethylene film with the width of 6mm multiplied by the thickness of 0.076mm is wrapped with a silver-plated copper wire stranded conductor 1 by a horizontal double-head wrapping machine, and a first insulating layer 2 is formed by wrapping two layers;
step three, wrapping a second insulating layer 4: winding a raw material polytetrafluoroethylene film with the width of 1.5mm multiplied by the thickness of 0.05mm on the outer wall of a single-mode optical fiber transmission carrier 3 by a vertical double-head winding machine to form a second insulating layer 4;
step four, preparing the photoelectric composite cable core 5: marking the five insulated silver-plated copper wire stranded conductors 1 and the single-mode optical fiber transmission carrier 3 by colors, and then stranding the conductors by a cable carrying machine; during twisting, the single-mode optical fiber transmission carrier 3 is placed in the center of the silver-plated copper wire stranded conductor 1, and the twisting direction is twisted in the right direction to form a photoelectric composite cable core 5;
step five, wrapping a fastening layer 6: wrapping the outer wall of the photoelectric composite cable core 5 with a microporous polytetrafluoroethylene film with the width of 12mm multiplied by the thickness of 0.102mm by a horizontal double-head wrapping machine to form a fastening layer 6;
step six, a shielding layer 7: weaving silver-plated copper wires on the outer wall of the fastening layer 6 through a 16-spindle weaving machine, and weaving 2 layers to form a shielding layer 7;
seventhly, extruding and wrapping an outer sheath 8: a layer of soluble polytetrafluoroethylene with the thickness of 0.35mm is extruded outside the woven shielding layer through a 40-type high-temperature extruder to form the protective sleeve 8.
Furthermore, the silver-plated copper wire stranded conductor 1 in the first step is formed by stranding 19 single conductors with the diameter of 0.127mm and the thickness of a silver layer of 1.5mm, the arrangement mode of the 19 single conductors is (1+6) +12, namely six conductors are stranded on the outer side of one middle conductor in the circumferential direction to form an inner layer, twelve conductors are stranded on the outer side of the inner layer in the circumferential direction to form an outer layer, and the inner layer and the outer layer are stranded in a concentric positive and negative direction; the pitch of the inner layer is 7mm, and the inner layer is twisted in the right direction; the outer layer pitch is 14mm, and left twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor 1 is 0.68mm after being stranded; controlling the pitch-diameter ratio of the stranded conductor to be 16-20 times, specifically, the pitch-diameter ratio of the inner layer is 20 times, and the pitch-diameter ratio of the outer layer is 18 times;
the lapping overlapping rate of the first layer of the first insulating layer 2 in the second step is 66%, the pitch is 3.7mm, the tension is 8N, and the right-hand lapping is carried out; the second layer of the first insulating layer 2 is lapped in a left direction with the lapping overlapping rate of 51%, the pitch of 4.4mm and the tension of 8N; the outer diameter is 1.24mm after wrapping;
and step three, the second insulating layer 4 is of a one-layer structure, the lapping overlapping rate is 66%, the pitch is 1.1mm, the tension is 3N, the second insulating layer is lapped in the right direction, and the outer diameter is 0.6mm after lapping.
Further, five silver-plated copper wire stranded conductors 1 are respectively wrapped by first insulating layers 2 of red, yellow, blue, green and purple colors; the second insulating layer 4 is wrapped in white;
the stranding pitch of the photoelectric composite cable core 5 in the step four is 38mm, and the stranding outer diameter is 3.07 mm;
and step five, the fastening layer 6 is lapped with the lapping overlapping rate of 51%, the number of layers is one, the pitch is 7.3mm, the tension is 12N, the left direction is lapped, and the outer diameter is 3.6mm after the lapping.
Further, the shielding layer 7 in the sixth step is formed by weaving 16 silver-plated copper wires with the width of 7mm and the thickness of 0.1mm in an inner-layer weaving structure, the weaving pitch is 11mm, the outer-layer weaving structure is formed by weaving 16 silver-plated copper wires with the width of 8mm and the thickness of 0.1mm, the weaving pitch is 13mm, and the weaving outer diameter is 4.5 mm;
the extrusion temperature of the sheath sleeve 8 in the step seven sequentially passes through five temperature zones, wherein the extrusion temperature zones are respectively 310 ℃, 390 ℃, 410 ℃, 430 ℃ and 410 ℃, the extrusion speed is 50rad/min, the traction speed is 30m/min, and the extrusion outer diameter is 5.2 mm.
Five silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier are adopted as the innermost layer transmission carrier; the method comprises the steps that a first insulating layer is wrapped outside a silver-plated copper wire stranded conductor by adopting a microporous polytetrafluoroethylene film in a wrapping mode, the colors of the first insulating layer are red, yellow, blue, green and purple, a second insulating layer is wrapped outside a single-mode optical fiber transmission carrier by adopting a white raw material polytetrafluoroethylene film, 6 kinds of red, yellow, blue, green, purple and white insulating wire cores are twisted into a photoelectric composite cable core, a layer of microporous polytetrafluoroethylene film is wrapped outside the cable core to serve as a fastening layer, two layers of silver-plated copper wires are woven outside the fastening layer to serve as a shielding layer, fluoroplastics are extruded outside the shielding layer to serve as an outer sheath to obtain a photoelectric composite data bus, the conductor twisting pitches are twisted by adopting pitches with large pitch-diameter ratios, the pitch-diameter ratio of the silver-plated copper wire stranded conductor is controlled to be 16-20 times, and the insulating layers are all; in order to avoid the situation that the wire cores of the bus are moved and dislocated in the using process, the pitch-diameter ratio of the photoelectric composite cable core is controlled to be 12 times during stranding, and a fastening layer is arranged outside the whole cable core, so that the phenomenon that the wire cores of the cable are dislocated and moved under the frequent moving occasion is avoided, and the transmission stability of the cable is ensured. The problems that photoelectric signals cannot be transmitted simultaneously, and the photoelectric signals cannot resist high temperature and low temperature are solved, the bus can simultaneously transmit the photoelectric signals on the same path, can resist high and low temperatures of-65 ℃ to +200 ℃, and can meet the technical effect of transmitting photoelectric multi-path signals in an aerospace vehicle task and control system.
Example 5, described in connection with figure 1.
A photoelectric composite data bus comprises an innermost layer transmission carrier, a single mode fiber transmission carrier and a plurality of silver-plated copper wire stranded conductors, wherein the innermost layer transmission carrier comprises four silver-plated copper wire stranded conductors (1) and one single mode fiber transmission carrier (3); a micro-porous polytetrafluoroethylene film is wrapped outside the silver-plated copper wire stranded conductor (1) to serve as a first insulating layer (2), and the colors of the silver-plated copper wire stranded conductor are red, yellow, blue and green; a white raw material polytetrafluoroethylene film is wrapped outside the single-mode optical fiber transmission carrier (3) to serve as a second insulating layer (4), and sintering and shaping are needed; five kinds of red, yellow, blue, green and white insulated wire cores are twisted into a photoelectric composite cable core (5); a layer of microporous polytetrafluoroethylene film is wound outside the photoelectric composite cable core (5) to be used as a fastening layer (6); two layers of silver-plated copper wires are woven outside the fastening layer (6) to serve as a shielding layer (7); and extruding fluoroplastic outside the shielding layer (7) to be used as an outer sheath (8), and finally forming.
The photoelectric composite data bus adopts four silver-plated copper wire stranded conductors for electric signal transmission and a single-mode optical fiber transmission carrier with the outer diameter of 0.254 +/-0.02 mm for optical signal transmission; the silver-plated copper wire stranded conductor is formed by stranding 19 single conductors with the diameter of 0.127mm and the thickness of a silver layer of 1.5mm, the arrangement mode of the 19 single conductors is (1+6) +12, namely six conductors are stranded on the outer side of a middle conductor in the circumferential direction to form an inner layer, twelve conductors are stranded on the outer side of the inner layer in the circumferential direction to form an outer layer, and the inner layer and the outer layer are stranded in the concentric positive and negative directions; the pitch of the inner layer is 6 +/-1 mm, and the inner layer is twisted in the right direction; the outer layer pitch is 12mm +/-2 mm, and left-hand twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor is 0.63 +/-0.05 mm after being stranded; controlling the pitch-diameter ratio of the stranded conductor to be 16-20 times, specifically, controlling the pitch-diameter ratio of the inner layer to be 16 times and controlling the pitch-diameter ratio of the outer layer to be 20 times; the silver-plated copper wire stranded conductor is insulated by adopting two layers of microporous polytetrafluoroethylene films with the specification of width of 6mm multiplied by thickness of 0.076mm as a first insulating layer, the dielectric constant of the microporous polytetrafluoroethylene films is 1.40-1.45, the transmission rate of electric signals is 83% -85%, the highest transmission frequency is 1000MHz, and the transmission attenuation is 0.60dB/m @1000 MHz; a single-mode optical fiber transmission carrier is externally wrapped by a white raw material polytetrafluoroethylene film with the specification of 1.5mm in width and 0.05mm in thickness to serve as a second insulating layer, and the transmission attenuation is 0.6dB/km @1310nm and 0.5dB/km @1550 nm; therefore, the transmitted optical signal and the transmitted electric signal are not influenced mutually, and the photoelectric transmission performance is good.
The photoelectric composite cable core is formed by twisting five insulation wire cores of red, yellow, blue, green and white, the twisting direction is right, and the twisting pitch-diameter ratio is 12 times; a layer of microporous polytetrafluoroethylene film with the specification of width of 12mm multiplied by thickness of 0.102mm is wound outside the photoelectric composite cable core to be used as a fastening layer; two layers of silver-plated copper wires with the monofilament diameter of 0.10mm are woven outside the fastening layer to serve as shielding layers, and the weaving density of each layer is 92%; and extruding fluoroplastic with the thickness of 0.35mm outside the shielding layer to serve as an outer sheath, and finally forming.
The transmission carrier of the photoelectric composite data bus adopts silver-plated copper wires and single-mode optical fibers, the insulating layer, the fastening layer and the outer sheath all adopt fluorine-containing polymers, and the shielding layer adopts the silver-plated copper wires, so that the photoelectric composite data bus has excellent high and low temperature resistance, can resist the environmental temperature of-65 ℃ to +250 ℃, and can be used in aircrafts in severe environments used by various marches.
The photoelectric composite data bus fully considers the requirements of flexibility and stability in the design process, so that the conductor twisting pitches are twisted by adopting pitches with large pitch-diameter ratio, and the pitch-diameter ratio of the twisted conductors is controlled to be 16-20 times; the insulating layers are all in a wrapping structure, so that the flexibility of the bus is obviously improved; in order to avoid the situation that the wire cores of the bus are moved and dislocated in the using process, the pitch-diameter ratio of the photoelectric composite cable core is controlled to be 12 times during stranding, and a fastening layer is arranged outside the whole cable core, so that the phenomenon that the wire cores of the cable are dislocated and moved under the frequent moving occasion is avoided, and the transmission stability of the cable is ensured.
The photoelectric composite data bus has excellent high and low temperature resistance, excellent electrical performance, and higher transmission stability and efficiency. The optical fiber transmission device can not only transmit data in a digital form, but also transmit data through optical signals, ensures the quality of signals, can effectively transmit high-speed and complex video and image signals, and is suitable for transmitting multi-path photoelectric signals in aviation and aerospace flight missions and control systems.
To sum up, in embodiments 1 to 5 of the present application, the aerospace photoelectric composite data bus transmission carrier adopts three or four or five silver-plated copper wire stranded conductors and a single-mode optical fiber transmission carrier, the silver-plated copper wire stranded conductor insulation adopts two layers of microporous polytetrafluoroethylene films with the specification of 6mm × 0.076mm as insulation, the microporous polytetrafluoroethylene film has a dielectric constant of 1.40 to 1.45, an electrical signal transmission rate of 83% to 85%, a highest transmission frequency of 1000MHz, and transmission attenuation of 0.60dB/m @1000 MHz; the single-mode optical fiber transmission carrier is wrapped and insulated by a white raw material polytetrafluoroethylene film with the specification of 1.5mm multiplied by 0.05mm, and the transmission attenuation is 0.6dB/km @1310nm and 0.5dB/km @1550 nm; the transmitted optical signal and the transmitted electric signal are not influenced mutually, and the photoelectric transmission performance is good.
The photoelectric composite data bus fully considers the requirements on flexibility and stability in the design process, so that the conductor twisting pitches are twisted by adopting pitches with large pitch-diameter ratio, the pitch-diameter ratio of the silver-plated copper wire twisted conductor is controlled to be 16-20 times, the insulating layers are all in wrapping structures, and the flexibility of the bus is obviously improved; in order to avoid the situation that the wire cores of the bus are moved and dislocated in the using process, the pitch-diameter ratio of the photoelectric composite cable core is controlled to be 12 times during stranding, and a fastening layer is arranged outside the whole cable core, so that the phenomenon that the wire cores of the cable are dislocated and moved under the frequent moving occasion is avoided, and the transmission stability of the cable is ensured.
The transmission carrier of the bus adopts silver-plated copper wires and single-mode optical fiber transmission carriers, the insulating layer, the fastening layer and the outer sheath adopt fluorine-containing polymers, and the shielding layer adopts silver-plated copper wires, so that the problems that photoelectric signals of the bus cannot be transmitted simultaneously, cannot resist high temperature and low temperature are solved, the requirements of other basic electrical performance and mechanical performance indexes are met, the bus can simultaneously transmit the photoelectric signals in the same way, the high and low temperatures of-65 ℃ to +250 ℃ are met, and the technical effect of transmitting photoelectric multi-path signals in aerospace craft tasks and control systems can be met.
The product of the invention has the following technological parameters:
performance parameter comparison table of bus cable and common 1394B cable adopting technical scheme of the invention
Finally, it should be noted that: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A photoelectric composite data bus is characterized by comprising at least three silver-plated copper wire stranded conductors (1) and a single-mode optical fiber transmission carrier (3); the silver-plated copper wire stranded conductor (1) is wrapped with a first insulating layer (2); a second insulating layer (4) is wrapped outside the single-mode optical fiber transmission carrier (3); the periphery of the single-mode optical fiber transmission carrier (3) is stranded with the silver-plated copper wire stranded conductor (1) to form a photoelectric composite cable core (5); a fastening layer (6) is wound and coated outside the photoelectric composite cable core (5); a shielding layer (7) is arranged outside the fastening layer (6); and an outer sheath (8) is extruded outside the shielding layer (7).
2. The optoelectronic composite data bus of claim 1, wherein the first insulating layer (2) is a microporous polytetrafluoroethylene film; the second insulating layer (4) is a white raw material polytetrafluoroethylene film.
3. The optoelectronic composite data bus of claim 1, wherein the fastening layer (6) is a microporous polytetrafluoroethylene film; the shielding layer (7) is formed by weaving two layers of silver-plated copper wires.
4. The optoelectronic composite data bus as set forth in claim 2, wherein the first insulating layer (2) comprises two layers of microporous polytetrafluoroethylene films having a width of 6mm x a thickness of 0.076 mm; the dielectric constant of the microporous polytetrafluoroethylene film is 1.40-1.45; the second insulating layer (4) is wrapped and insulated by a white raw material polytetrafluoroethylene film with the specification of 1.5mm in width and 0.05mm in thickness; the longitudinal tensile strength of the white raw material polytetrafluoroethylene film is more than 10 MPa.
5. The optoelectronic composite data bus according to any one of claims 1 to 4, wherein the first insulating layer (2) is differentiated by four colors, red, yellow, blue and green, respectively; the second insulating layer (4) is white, the single-mode optical fiber transmission carrier (3) is arranged at the center for twisting, the twisting direction is the right direction, and the twisting pitch-diameter ratio is 12 times;
the fastening layer (6) is formed by wrapping a microporous polytetrafluoroethylene film with the specification of width of 12mm multiplied by thickness of 0.102mm outside the photoelectric composite cable core (5), and the dielectric constant of the microporous polytetrafluoroethylene film is 1.40-1.45;
the shielding layer (7) is two layers of silver-plated copper wires with monofilament diameter of 0.10mm, and the weaving density of each layer is 92%;
the outer sheath (8) is fluoroplastic with the thickness of 0.35 mm.
6. The photoelectric composite data bus of claim 5, wherein the photoelectric composite data bus uses four silver-plated copper wire stranded conductors (1) for electric signal transmission and a single-mode optical fiber transmission carrier (4) with an outer diameter of 0.254 ± 0.02mm for optical signal transmission;
the silver-plated copper wire stranded conductor (1) is formed by combining single conductors with the structure of 19/0.127mm and the silver layer thickness of 1.5mm, the sorting structure is (1+6) +12, and the inner layer and the outer layer are concentrically twisted in the positive direction and the negative direction; the pitch of the inner layer is 6 +/-1 mm, and the inner layer is twisted in the right direction; the outer layer pitch is 12mm +/-2 mm, and left-hand twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor (1) after being stranded is 0.63 +/-0.05 mm; the pitch-diameter ratio of the stranded conductor is controlled to be 16-20 times.
7. The method for preparing the photoelectric composite data bus according to any one of claims 1 to 6, which comprises the following steps:
preparing a silver-plated copper wire stranded conductor (1): sequentially arranging single conductors from inside to outside by using a wire bundling machine, and twisting the silver-plated copper wire conductors from inside to outside in a positive and negative direction;
wrapping a first insulating layer (2): a microporous polytetrafluoroethylene film with the width of 6mm multiplied by the thickness of 0.076mm is wrapped with a silver-plated copper wire stranded conductor (1) through a horizontal double-head wrapping machine, and a first insulating layer (2) is formed by wrapping two layers;
wrapping a second insulating layer (4): winding a raw material polytetrafluoroethylene film with the width of 1.5mm multiplied by the thickness of 0.05mm on the outer wall of a single-mode optical fiber transmission carrier (3) by a vertical double-head winding machine to form a second insulating layer (4);
preparing a photoelectric composite cable core (5): marking the insulated at least three silver-plated copper wire stranded conductors (1) and the single-mode optical fiber transmission carrier (3) by colors, and then stranding the conductors by a cable carrying machine; during twisting, the single-mode optical fiber transmission carrier (3) is placed in the center of the silver-plated copper wire stranded conductor (1), and the twisting direction is twisted in the right direction to form a photoelectric composite cable core (5);
wrapping fastening layer (6): wrapping the outer wall of the photoelectric composite cable core (5) with a microporous polytetrafluoroethylene film with the width of 12mm multiplied by the thickness of 0.102mm by a horizontal double-head wrapping machine to form a fastening layer (6);
braided shield layer (7): weaving silver-plated copper wires on the outer wall of the fastening layer (6) through a 16-spindle weaving machine, and weaving 2 layers to form a shielding layer (7);
the outer sheath (8) is extruded: and extruding and coating a layer of soluble polytetrafluoroethylene with the thickness of 0.35mm outside the woven shielding layer (7) by a 40-type high-temperature extruder to form a sheath (8).
8. The method for preparing the photoelectric composite data bus according to claim 7, wherein the silver-plated copper wire stranded conductor (1) is formed by combining single conductors with the structure of 19/0.127mm and the silver layer thickness of 1.5mm, the sequencing structure is (1+6) +12, and the inner layer and the outer layer are concentrically twisted in the positive direction and the negative direction; the pitch of the inner layer is 6 +/-1 mm, and the inner layer is twisted in the right direction; the outer layer pitch is 12mm +/-2 mm, and left-hand twisting is carried out; the outer diameter of the silver-plated copper wire stranded conductor (1) after stranding is 0.63 +/-0.05 mm; controlling the pitch-diameter ratio of the stranded conductor to be 16-20 times;
the lapping overlapping rate of the first layer (2.1) of the first insulating layer (2) is 63% -66%, the pitch is 3.6 +/-0.1 mm, the tension is 8N, and the right-hand lapping is carried out; the lapping overlapping rate of the second layer (2.2) of the first insulating layer (2) is 48% -51%, the pitch is 4.3 +/-0.1 mm, the tension is 8N, and the left-hand lapping is carried out; the outer diameter is 1.25 mm plus or minus 0.1mm after wrapping; the second insulating layer (4) is of a one-layer structure, the lapping overlapping rate is 63% -66%, the pitch is 1.0 +/-0.1 mm, the tension is 3N, the second insulating layer is lapped in the right direction, and the outer diameter is 0.5 +/-0.1 mm after the lapping.
9. The method for manufacturing the photoelectric composite data bus according to claim 7, wherein four silver-plated copper wire stranded conductors (1) are respectively wrapped by first insulating layers (2) of red, yellow, blue and green colors; the second insulating layer (4) is wrapped in white;
the stranding pitch of the photoelectric composite cable core (5) is 35 +/-3 mm, and the stranding outer diameter is 3.05 +/-0.2 mm;
the fastening layer (6) has a lapping overlapping rate of 48-51%, one layer, 7.2 +/-0.1 mm pitch, 12N tension, left-hand lapping and a 3.4 +/-0.2 mm outer diameter after lapping.
10. The method for manufacturing the photoelectric composite data bus of claim 7, wherein the shielding layer (7) has an inner layer weaving structure of 16 x 7/0.1mm, a weaving pitch of 10 ± 1mm, an outer layer weaving structure of 16 x 8/0.1mm, a weaving pitch of 12 ± 1mm, and a weaving outer diameter of 4.3 ± 0.2 mm;
the extrusion temperature of the sheath (8) passes through five temperature regions in sequence, wherein the extrusion temperature regions are respectively 300 +/-10 ℃, 380 +/-10 ℃, 400 +/-10 ℃, 420 +/-10 ℃, 400 +/-10 ℃, the extrusion speed is 45 rad/min-50 rad/min, the traction speed is 25 m/min-30 m/min, and the extrusion outer diameter is 5.0 +/-0.2 mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114188073A (en) * | 2021-12-07 | 2022-03-15 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | Zero-buoyancy watertight photoelectric composite cable and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114188073A (en) * | 2021-12-07 | 2022-03-15 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | Zero-buoyancy watertight photoelectric composite cable and manufacturing method thereof |
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