CN102522661A - Digital difference video transmission device among airborne electronic equipment - Google Patents
Digital difference video transmission device among airborne electronic equipment Download PDFInfo
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- CN102522661A CN102522661A CN2011104113005A CN201110411300A CN102522661A CN 102522661 A CN102522661 A CN 102522661A CN 2011104113005 A CN2011104113005 A CN 2011104113005A CN 201110411300 A CN201110411300 A CN 201110411300A CN 102522661 A CN102522661 A CN 102522661A
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- twisted pair
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Abstract
The invention discloses a digital difference video transmission device among airborne electronic equipment, which comprises a first Quadax connector contact body, a second Quadax connector contact body, a first four-coaxial cable and a second four-coaxial cable, wherein the first four-coaxial cable is connected with one end of the first connector contact body; the second four-coaxial cable is connected with one end of the second Quadax connector contact body; and the first Quadax connector contact body and the second Quadax connector contact body are mutually parallel. According to the digital difference video transmission device, the difference of the high-speed video transmission link among the airborne electronic equipment and the continuity of the impedance characteristic are guaranteed so as to guarantee stability and reliability of video transmission.
Description
Technical field
The present invention relates to a kind of video frequency transmitter, particularly relate to digital differential video frequency transmitter between a kind of air environment.
Background technology
In recent years,, possess the digital video of advantages such as high-resolution, high noise immunity and high stability, progressively substituted the analog video in traditional air environment along with the fast development of digitized video treatment technology.Grow the stable transfer of distance for guaranteeing digital video; Must adopt the mode of differential transfer; LVDS (Low Voltage Differential Signaling commonly used in the for example present airborne electronic equipment product; Low Voltage Differential Signal) and DVI (Digital Visual Interface, digital video) video interface, all be to use differential mode to carry out the transmission of digital video.And when adopting differential mode that digital video is transmitted, whole transmission link has strict difference and impedance design requirement, and along with the raising of video resolution, difference and impedance design requirement can more be tending towards strictness.So, increasing gradually along with what digital video transmission was used, the design of video transmission link also becomes very important design link.
In the airborne electronic equipment product; The source end of video transmission generally is distributed in the equipment compartment of the machine of carrying; And the terminal is generally in the passenger cabin display device that is distributed in the machine of carrying; According to different machine types video transmission distance more than 3 meters is arranged usually between the two, and in large aircraft this distance in addition can reach 15 meters.Between present airborne electronic equipment product, carry out the differential digital video transmission; General common connector and the twisted-pair feeder of only using; When this design was intended video in the mould difference of transmission low resolution, influence was also not obvious, but when the high-resolution digital differential video of transmission; Because connector and the difference of cable and not matching of impedance operator, the decay meeting of vision signal very seriously.Even when LVDS that uses general twisted-pair power cable transmission 1024 * 76860Hz resolution or DVI vision signal, can occur picture " snowflake " perhaps " shake " wait because the serious problem of decline of the display effect that transmission attenuation causes.
Summary of the invention
Technical problem to be solved by this invention provides digital differential video frequency transmitter between a kind of air environment; It guarantees the difference of high-speed video transmission link between the airborne electronic equipment product and the continuity of impedance operator, thereby guarantees stability, the reliability of video transmission.
The present invention solves above-mentioned technical problem through following technical proposals: digital differential video frequency transmitter between a kind of air environment; It is characterized in that; It comprises a Quadrax connector contact, the 2nd Quadrax connector contact, the one or four coaxial cable, the two or four coaxial cable; The one or four coaxial cable is connected with an end of a Quadrax connector contact; The two or four coaxial cable is connected with an end of the 2nd Quadrax connector contact, and a Quadrax connector contact, the 2nd Quadrax connector contact are arranged side by side each other.
Preferably; A said Quadrax connector contact, the 2nd Quadrax connector contact all comprise pin hole, shell, shielding crimp rings and cable protective sleeve; The quantity of pin hole is four; Four pin holes are arranged with the mode of matrix, and pin hole is located at an end of shell, and the shielding crimp rings is located between shell and the cable protective sleeve.
Preferably; Said the one or four coaxial cable, the two or four coaxial cable all comprise first pair of differential twisted pair, second pair of differential twisted pair, inner core filler, metal screen layer and external insulation layer; First pair of differential twisted pair, second pair of differential twisted pair make up with four pin hole crimping respectively; First pair of differential twisted pair, second pair of differential twisted pair surround the inner core filler; Metal screen layer and the crimping of shielding crimp rings, metal screen layer and external insulation layer surround first pair of differential twisted pair, second pair of differential twisted pair successively.
Positive progressive effect of the present invention is: in the airborne electronic equipment product, adopt the present invention, can satisfy high-speed-differential vision signal difference and impedance operator and on transmission link, mate requirement, can satisfy the long Distance Transmission requirement of high-resolution digital difference video.And, through using special-purpose contact and the cable that matches, greatly reduce the difficulty of vision cable processing, improved production efficiency of products.Use and to increase gradually along with digital video transmission in the airborne electronic equipment product, can solve peculiar problem in the digital video transmission process, possess the transmission attenuation minimizing, antijamming capability is strong, characteristics such as the longer and processing of transmission range is easier through the present invention.
Description of drawings
Fig. 1 is a Quadrax connector contact of the present invention's use and the structural front view of the one or four coaxial cable.
Fig. 2 is the 2nd Quadrax connector contact of the present invention's use and the structural representation of the two or four coaxial cable.
Fig. 3 is the structural front view of the Quadrax connector contact of the present invention's use.
Fig. 4 is the structure side view of the Quadrax connector contact of the present invention's use.
Fig. 5 is the structure side view of four coaxial cables of the present invention's use.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to specify technical scheme of the present invention.
As depicted in figs. 1 and 2, the present invention needs to use two Quadrax connector contacts to be used for transmission of one line digital differential video when transmission LVDS or DVI difference video signal.The digital differential video frequency transmitter comprises a Quadrax connector contact 1, the 2nd Quadrax connector contact the 3, the 1 coaxial cable the 2, the 24 coaxial cable 4 between air environment of the present invention; The one or four coaxial cable 2 is connected with an end of a Quadrax connector contact 1; The two or four coaxial cable 4 is connected with an end of the 2nd Quadrax connector contact 3, and a Quadrax connector contact 1, the 2nd Quadrax connector contact 3 are each other side by side.Like Fig. 3 and shown in Figure 4, wherein a Quadrax connector contact 1, the 2nd Quadrax connector contact 3 are the contact of two same structures, all comprise pin hole 20, shell 21, shielding crimp rings 22 and cable protective sleeve 23.The quantity of pin hole 20 is four, and four pin holes 20 are arranged with the mode of matrix.Pin hole 20 is located at an end of shell 21, and shielding crimp rings 22 is located between shell 21 and the cable protective sleeve 23.
The present invention uses Quadrax connector contact, and this type contact is the special-purpose four coaxial contacts of a kind of high-speed differential signal of in the ARINC600 standard, formulating.Along with the occasion that transmission is used to high-speed differential signal between the airborne electronic equipment product is more and more; This contact not only can be used to meet in the 8# pin cavity of connector of ARINC600 standard; Also can be loaded in the 8# pin cavity in the connector that meets ARINC404 and GJB599III standard, and can supply to select for use according to the product that the type of transmission signals possesses multiple impedance operators such as 100 Ω or 110 Ω.
As shown in Figure 5; The present invention is when using Quadrax connector contact transmission difference video signal; Need four coaxial cables of two special-purpose same models of collocation; The one or four coaxial cable the 2, the 24 coaxial cable 4 all comprises first pair of differential twisted pair 31, second pair of differential twisted pair 32, inner core filler 35, metal screen layer 36 and external insulation layer 37; The first pair of differential twisted pair 31, the second pair of differential twisted pair 32 respectively with four pin hole crimping combinations (being that a pair of differential twisted pair makes up with two pin hole crimping); The first pair of differential twisted pair 31, second pair of differential twisted pair 32 surround inner core fillers 35, and metal screen layer 36 and 22 crimping of shielding crimp rings, metal screen layer 36 and external insulation layer 37 surround first pair of differential twisted pair 31, second pair of differential twisted pair 32 successively.The differential signal definition of the arrangement mode of differential twisted pair and Quadrax connector contact is coupling fully.At present, the impedance of using always is that four coaxial cables of 100 Ω have the CEC-RWC-18664 of AMP Inc. and the multiple models such as NF24Q100 of TENSOLITE company.
As shown in Figure 4, the present invention needs the particularity according to difference video signal is stipulated signal definition when transmission LVDS or DVI difference video signal.When transmitting color LVDS or DVI video, need to use.If when only needing transmission of one line black and white LVDS or DVI video; According to the definition of the present invention Quadrax connector contact that need only to use a differential impedance be 100 Ω; Because all the clock signal of video is coded in the 3rd centering in four pairs of differential signals in LVDS and the DVI coding rule, need only clock signal and clock signal be transferred to receiving terminal and can decode vision signal.Concrete signal definition sees the following form one.
Table one
Description according to Fig. 1 to Fig. 5; In the course of processing; The one or four coaxial cable 2 and a Quadrax connector contact 1 are assembled; The two or four coaxial cable 4 and the 2nd Quadrax connector contact 3 are assembled, and use crimping tool (M22520/2-01) that differential twisted pair and pin hole are carried out crimping at crimping position in the assembling process, promptly the first pair of differential twisted pair 31, the second pair of differential twisted pair 32 respectively with four pin hole crimping combinations.The inner core filler of cable need be cut off, and the metal screen layer of four coaxial cables needs and the shielding crimp rings of contact needs to carry out crimping at shielding crimping position tool using (M22520/5-01).
Among the present invention, use Quadrax connector contact to cooperate four special-purpose coaxial cables, be applicable to the transmission of growing distance, high-resolution difference video signal between the airborne electronic equipment product.In the LVDS video transmission is used, use the present invention to carry out the transmission of the color video of 1024 * 76860Hz, can reach the above transmission range of 10m, this distance has improved more than 5 times when connector is arranged in pairs or groups common cable than using to have now.Simultaneously; For the DVI video, the highest when using existing connector to arrange in pairs or groups common cable can only be to the 5m with the video transmission of 1024 * 76860Hz, and after using the present invention; Add and carry out preemphasis, terminal at the source end and carry out under the balanced method; Can the DVI video of 1600 * 120060Hz then be transferred to 30m, not only the resolution of transmission has improved 2.5 times, and the distance of transmission has also improved 6 times simultaneously.Can satisfy between the airborne electronic equipment product demand fully to digital video transmission resolution and transmission range; Simultaneously because the matching properties of Quadrax connector contact and four coaxial cables; It is very simple and easy reliable that the processing of vision cable becomes, and improved the production efficiency of video cables greatly.
Though more than described embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, under the prerequisite that does not deviate from principle of the present invention and essence, can make numerous variations or modification to these execution modes.Therefore, protection scope of the present invention is limited appended claims.
Claims (3)
1. digital differential video frequency transmitter between an air environment; It is characterized in that; It comprises a Quadrax connector contact, the 2nd Quadrax connector contact, the one or four coaxial cable, the two or four coaxial cable; The one or four coaxial cable is connected with an end of a Quadrax connector contact, and the two or four coaxial cable is connected with an end of the 2nd Quadrax connector contact, and a Quadrax connector contact, the 2nd Quadrax connector contact are arranged side by side each other.
2. digital differential video frequency transmitter between air environment as claimed in claim 1; It is characterized in that; A said Quadrax connector contact, the 2nd Quadrax connector contact all comprise pin hole, shell, shielding crimp rings and cable protective sleeve, and the quantity of pin hole is four, and four pin holes are arranged with the mode of matrix; Pin hole is located at an end of shell, and the shielding crimp rings is located between shell and the cable protective sleeve.
3. digital differential video frequency transmitter between air environment as claimed in claim 2; It is characterized in that; Said the one or four coaxial cable, the two or four coaxial cable all comprise first pair of differential twisted pair, second pair of differential twisted pair, inner core filler, metal screen layer and external insulation layer; First pair of differential twisted pair, second pair of differential twisted pair make up with four pin hole crimping respectively; First pair of differential twisted pair, second pair of differential twisted pair surround the inner core filler, metal screen layer and the crimping of shielding crimp rings, and metal screen layer and external insulation layer surround first pair of differential twisted pair, second pair of differential twisted pair successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104113005A CN102522661A (en) | 2011-12-12 | 2011-12-12 | Digital difference video transmission device among airborne electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104113005A CN102522661A (en) | 2011-12-12 | 2011-12-12 | Digital difference video transmission device among airborne electronic equipment |
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| Publication Number | Publication Date |
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| CN102522661A true CN102522661A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104113005A Pending CN102522661A (en) | 2011-12-12 | 2011-12-12 | Digital difference video transmission device among airborne electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109754919A (en) * | 2017-11-01 | 2019-05-14 | 天津东方浩瑞光电科技有限公司 | 6A class 4 is to 24 line gauge unshielded twisted pairs |
| CN109980412A (en) * | 2017-12-28 | 2019-07-05 | 苏州兆特电子股份有限公司 | A kind of four coaxial connectors |
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| JP2005085721A (en) * | 2003-09-11 | 2005-03-31 | Honda Tsushin Kogyo Co Ltd | Coaxial connector |
| CN201413919Y (en) * | 2009-03-11 | 2010-02-24 | 中航光电科技股份有限公司 | Difference contact couple and difference connector |
| CN101677166A (en) * | 2008-09-19 | 2010-03-24 | 中航光电科技股份有限公司 | Differential contact double jacks and corresponding socket and plug thereof |
| CN201918606U (en) * | 2010-11-23 | 2011-08-03 | 广东威创视讯科技股份有限公司 | Cable connecting device |
| US20110237124A1 (en) * | 2010-03-29 | 2011-09-29 | Flaherty Thomas E | Digital, Small Signal and RF Microwave Coaxial Subminiature Push-on Differential Pair System |
| CN202042277U (en) * | 2011-04-02 | 2011-11-16 | 张家港特恩驰电缆有限公司 | CAT6A data shielding cable |
-
2011
- 2011-12-12 CN CN2011104113005A patent/CN102522661A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005085721A (en) * | 2003-09-11 | 2005-03-31 | Honda Tsushin Kogyo Co Ltd | Coaxial connector |
| CN101677166A (en) * | 2008-09-19 | 2010-03-24 | 中航光电科技股份有限公司 | Differential contact double jacks and corresponding socket and plug thereof |
| CN201413919Y (en) * | 2009-03-11 | 2010-02-24 | 中航光电科技股份有限公司 | Difference contact couple and difference connector |
| US20110237124A1 (en) * | 2010-03-29 | 2011-09-29 | Flaherty Thomas E | Digital, Small Signal and RF Microwave Coaxial Subminiature Push-on Differential Pair System |
| CN201918606U (en) * | 2010-11-23 | 2011-08-03 | 广东威创视讯科技股份有限公司 | Cable connecting device |
| CN202042277U (en) * | 2011-04-02 | 2011-11-16 | 张家港特恩驰电缆有限公司 | CAT6A data shielding cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109754919A (en) * | 2017-11-01 | 2019-05-14 | 天津东方浩瑞光电科技有限公司 | 6A class 4 is to 24 line gauge unshielded twisted pairs |
| CN109980412A (en) * | 2017-12-28 | 2019-07-05 | 苏州兆特电子股份有限公司 | A kind of four coaxial connectors |
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Application publication date: 20120627 |