CN201163552Y - Power supply type radio frequency coaxial cable - Google Patents
Power supply type radio frequency coaxial cable Download PDFInfo
- Publication number
- CN201163552Y CN201163552Y CNU2008200326097U CN200820032609U CN201163552Y CN 201163552 Y CN201163552 Y CN 201163552Y CN U2008200326097 U CNU2008200326097 U CN U2008200326097U CN 200820032609 U CN200820032609 U CN 200820032609U CN 201163552 Y CN201163552 Y CN 201163552Y
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- cable
- radio frequency
- frequency coaxial
- power supply
- wire
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Abstract
The utility model belongs to a power-supply type RF coaxial cable used in a closed-circuit monitoring television system. The cable consists of a (twisted) inner conductor (1), an inner conductor insulating sheath (2), a network cable outer conductor (3) and a network cable outer conductor insulating sheath (4); moreover, an anode conductor (5) for transmitting direct current is arranged in the cable. The anode conductor (5) adopts a (color) enameled wire with the temperature resistance index of 180 at least, and is positioned in the same shielding layer with the network cable outer conductor (3) of the coaxial cable. The cable not only can transmit signals, but also can transmit direct current for a video camera at the front end of the closed-circuit monitoring television system.
Description
1, technical field
The utility model belongs to a kind of power supply type radio frequency coaxial-cable that uses in the closed circuit monitoring television system.
2, background technology
At present, the operating characteristic impedance is the coaxial cable transmission signals of 75 Ω in the civil closed-circuit monitoring television system." GB 50198-1994 technical code for civil closed circuit monitoring TV system engineering " regulation:
" the 2.3.1.1 transmission range is nearer, can adopt the video transmission mode of coaxial cable transmission of video baseband signal ";
" the 2.3.1.2 transmission range is far away, and the monitoring point has a very wide distribution, and in the time of maybe need advancing cable television network, should adopt the radio frequency transmission mode of coaxial cable transmission rf modulated signal ";
" ditch (tunnel) is when laying altogether with other circuit (220V ac power supply line) when cable (radio frequency coaxial-cable) for 2.3.7.2, and its minimum spacing should meet the regulation (being 0.5 meter) of showing 2.3.7-1 ".
" the 2.5.2 video camera should draw special line through the unified power supply of isolating transformer by Control Room; ... ",
As seen, the common radio frequency coaxial-cable that uses in the closed circuit monitoring television system at present can only be the system transmissions signal, because the radio frequency coaxial-cable and the 220V ac power supply line independence cable installation in pipe of system have increased the engineering construction and the cost of processed materials purchased.
From the relevant utility model patent (notification number of having announced: CN2090569), carried out certain improvement to satisfy the direct current supply function at common radio frequency coaxial-cable singlely, but for common radio frequency coaxial-cable, increase when the cable after the improvement has increased raw-material consumption, worker has bar none increased the overall dimension of coaxial cable.
3, summary of the invention
3.1 the technical problem of the required solution of the utility model is the transmission signals well that a kind of cheapness is provided for the closed circuit monitoring television system, again the required galvanic power supply type radio frequency coaxial-cable of conveying system front-end camera stably.
3.2 the technical scheme that the utility model adopted:
Power supply type radio frequency coaxial-cable described in the utility model is by (stranded) inner wire, inner wire insulation sheath, netting twine outer conductor, netting twine insulation sheath and be used to transmit galvanic positive wire and form.
Described positive wire is 1 group of heatproof index at least 180, (colour) enamelled wire that adopts the composite coating explained hereafter;
(colour) enamelled wire that described positive wire adopts can be when the netting twine outer conductor of the common radio frequency coaxial-cable of processing, and braiding is enrolled in the common radio frequency coaxial-cable netting twine outer conductor together;
(colour) enamelled wire that described positive wire adopts also can be when the stranded inner wire of the common radio frequency coaxial-cable of processing, and bundle twists together, and hard-pressed bale is gone in the stranded inner wire of common radio frequency coaxial-cable.
3.3 the beneficial effects of the utility model:
When common radio frequency coaxial-cable was worked, inner wire was as the signal circuit positive pole, and the netting twine outer conductor is as the signal circuit negative pole.
And in the electronic circuit of closed circuit monitoring television system front-end camera, signal circuit and DC power supply (DC12V) loop is negative pole altogether, so when radio frequency coaxial-cable is connected with video camera with coaxial connector, DC power supply (DC12V) loop negative pole just communicates with the netting twine outer conductor of radio frequency coaxial-cable, therefore, only need in common radio frequency coaxial-cable, to add and to transmit galvanic positive wire and just can realize the direct current supply function.
The plasticization temperature of PVC CABLE MATERIALS and PE polyethylene insulation material is generally at 150～170 ℃, take all factors into consideration accumulated temperature and cooling effect in the extrusion process, positive wire of the present utility model is selected 1 group of heatproof index at least 180 for use, is adopted (colour) enamelled wire of composite coating explained hereafter.Because enamelled wire is of slight difference on external diameter with respect to the conductor that paint film coats, thus power supply type radio frequency coaxial-cable described in the utility model be consistent on overall dimension with respect to common radio frequency coaxial-cable, and when not increasing extra worker.
On the other hand, what the utility model transmitted is direct current, no matter is by linear stabilized power supply or is that Switching Power Supply is provided, and its ripple and noise can be very little, so the influence that the signal transmission of coaxial cable is brought can be disregarded; Moreover, no matter be that positive wire enrolls coaxial cable netting twine outer conductor or hard-pressed bale is gone in the stranded inner wire, because this moment, netting twine outer conductor or stranded inner wire were as the DC loop negative pole, and the positive and negative electrode lead closely contacts, so the electric field in direct current transmission loop can be disregarded the influence that the signal transmission of coaxial cable is brought, also be the utility model when transmission signals, laser propagation effect is identical with common radio frequency coaxial-cable.
So the utility model is transmission signals well, the required direct current of conveying system front-end camera and do not increase bigger production cost with respect to common radio frequency coaxial-cable stably can produce bigger economic benefit again.
4, description of drawings
Accompanying drawing 1 is in the power supply type radio frequency coaxial-cable of same screen for positive wire and coaxial cable netting twine outer conductor.
Accompanying drawing 2 is gone into power supply type radio frequency coaxial-cable in the stranded inner wire of coaxial cable for the positive wire hard-pressed bale.
5, embodiment
Common radio frequency coaxial-cable is made up of (stranded) inner wire (1), inner wire insulation sheath (2), netting twine outer conductor (3), netting twine outer conductor insulation sheath (4).The utility model is to improve on the basis of common radio frequency coaxial-cable, promptly in common radio frequency coaxial-cable, be equipped with and be used to carry galvanic positive wire (5), positive wire is 1 group of heatproof index at least 180, (colour) enamelled wire that adopts the composite coating explained hereafter, can be when the netting twine outer conductor of the common radio frequency coaxial-cable of processing, braiding is enrolled in the common radio frequency coaxial-cable netting twine outer conductor (3) together; Also can be when the stranded inner wire of the common radio frequency coaxial-cable of processing, bundle twists together, and hard-pressed bale is gone in the stranded inner wire of common radio frequency coaxial-cable (1).
Be described further in conjunction with the accompanying drawings with embodiment below.
Embodiment 1
As shown in Figure 1, positive wire (5) is selected 1 group of heatproof index at least 180 for use, is adopted (colour) enamelled wire of composite coating explained hereafter, when the knitting process of the common radio frequency coaxial-cable of processing, inweaves in the netting twine outer conductor (3) with braided wires.
The utility model in use, (stranded) inner wire (1) is as the signal transmission loop positive pole, positive wire (5) is as the DC loop positive pole, netting twine outer conductor (3) is as DC loop and the shared negative pole of signal transmission loop.Because electric current is opposite sign but equal magnitude in positive wire (5) and netting twine outer conductor (3), and is in the netted face of cylinder of coaxial cable shield, so the direct current of the utility model transmission can be ignored to the influence of coaxial cable transmission signals.
In the present embodiment, because netting twine outer conductor (3) is identical with the occupation mode of common radio frequency coaxial-cable as the signal circuit negative pole, so the power supply type coaxial cable antijamming capability in this example is stronger.
As shown in Figure 2, relative embodiment 1, the positive wire in this example (5) hard-pressed bale is gone in the stranded inner wire of common radio frequency coaxial-cable (1).In actual use, netting twine outer conductor (3) is as the signal circuit positive pole, and positive wire (5) is as the DC loop positive pole, and stranded inner wire (1) is as signal circuit and the shared negative pole of DC loop.Because electric current is opposite sign but equal magnitude in positive wire (5) and stranded inner wire (1), positive wire (5) is symmetrically distributed in stranded process with stranded inner wire (1) in addition, closely contact, and wire spacing is small, so the direct current of the utility model transmission can be ignored to the influence of coaxial cable transmission signals.
In the present embodiment because netting twine outer conductor (3) is as video loop positive pole, so the power supply type radio frequency coaxial-cable antijamming capability in this example a little less than.For overcoming this shortcoming, in actual use, advise outdoor employing metal K BG pipe (buried) threading, indoor use metal crane span structure (ground connection) cabling be advisable or during threading and interference source keep suitable distance.
Claims (3)
1, a kind of power supply type radio frequency coaxial-cable, form by (stranded) inner wire (1), inner wire insulation sheath (2), netting twine outer conductor (3), netting twine insulation sheath (4), it is characterized in that being equipped with in the described cable and be used to carry galvanic positive wire (5).
2, according to the described power supply type radio frequency coaxial-cable of claim 1, it is characterized in that carrying galvanic positive wire (5) to be (colour) enamelled wire of heatproof index at least 180, be in same screen with coaxial cable netting twine outer conductor (3).
3, according to the described power supply type radio frequency coaxial-cable of claim 1, it is characterized in that carrying galvanic positive wire (5) to be (colour) enamelled wire of heatproof index at least 180, hard-pressed bale is in coaxial cable (stranded) inner wire (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200326097U CN201163552Y (en) | 2008-02-22 | 2008-02-22 | Power supply type radio frequency coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200326097U CN201163552Y (en) | 2008-02-22 | 2008-02-22 | Power supply type radio frequency coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201163552Y true CN201163552Y (en) | 2008-12-10 |
Family
ID=40184481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200326097U Expired - Lifetime CN201163552Y (en) | 2008-02-22 | 2008-02-22 | Power supply type radio frequency coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201163552Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104335294A (en) * | 2012-05-22 | 2015-02-04 | 瑞典爱立信有限公司 | Cable for powering of mast mounted radio equipment |
| CN107333214A (en) * | 2017-07-21 | 2017-11-07 | 柴雪 | A kind of audio frequency broadcast system based on area distribution formula audio amplifier |
| CN109859896A (en) * | 2019-04-23 | 2019-06-07 | 优易电缆(张家港)有限公司 | A kind of multiply enameled wire conductor composite cable |
-
2008
- 2008-02-22 CN CNU2008200326097U patent/CN201163552Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104335294A (en) * | 2012-05-22 | 2015-02-04 | 瑞典爱立信有限公司 | Cable for powering of mast mounted radio equipment |
| CN107333214A (en) * | 2017-07-21 | 2017-11-07 | 柴雪 | A kind of audio frequency broadcast system based on area distribution formula audio amplifier |
| CN107333214B (en) * | 2017-07-21 | 2019-11-12 | 北京智防工程技术研究院有限公司 | A kind of audio frequency broadcast system based on area distribution formula speaker |
| CN109859896A (en) * | 2019-04-23 | 2019-06-07 | 优易电缆(张家港)有限公司 | A kind of multiply enameled wire conductor composite cable |
| CN109859896B (en) * | 2019-04-23 | 2024-02-23 | 优易电缆(张家港)有限公司 | Multi-strand enameled wire conductor composite cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081210 |
|
| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Tan Hongkui Document name: Notification of Expiration of Patent Right Duration |
|
| DD01 | Delivery of document by public notice |