CN205491175U - A mobile communication system for cable tunnel - Google Patents
A mobile communication system for cable tunnel Download PDFInfo
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- CN205491175U CN205491175U CN201620041428.5U CN201620041428U CN205491175U CN 205491175 U CN205491175 U CN 205491175U CN 201620041428 U CN201620041428 U CN 201620041428U CN 205491175 U CN205491175 U CN 205491175U
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- cable
- cable tunnel
- tunnel
- communication system
- mobile communication
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- 238000010295 mobile communication Methods 0.000 title claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 27
- 238000002955 isolation Methods 0.000 claims description 19
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- 238000012423 maintenance Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
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- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011176 pooling Methods 0.000 description 1
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- 210000001364 upper extremity Anatomy 0.000 description 1
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Abstract
The utility model discloses a mobile communication system for cable tunnel, a mobile communication system for cable tunnel include antenna, repeater and reveal the cable, it arranges in cable tunnel to reveal the cable, antenna, repeater and to reveal the cable consecutive, reveal the wireless signal coverage cable tunnel that the cable sent for the mobile phone who lies in the cable tunnel space can use other mobile phone in this radio signal and cable tunnel space and carry out radio communication with the external world. Antenna and repeater be 3 sets, a mobile communication system for cable tunnel still include combiner and 3 anti -interference units, this a mobile communication system for cable tunnel easy to carry out, the signal coverage rate is high.
Description
Technical field
This utility model relates to a kind of mobile communication system for cable tunnel.
Background technology
Along with the improving constantly of urban power load density, the in addition urban planning concordance to power transmission line corridor
Require more and more stricter.The highest form that cable tunnel lays as ultra-high-tension power transmission line, because of its environmental friendliness,
Section transmission capacity and the feature such as feeder number is big, be the most increasingly widely used in large-and-medium size cities power grid construction
In.
Often be arranged in underground deep layer due to cable tunnel, generally less than ground 10-20 rice, its reinforcing bar mixes in addition
Xtah Crude Clay structure makes public network mobile radiotelephone signal not penetrate in tunnel, and in tunnel, cable returns the many maintenances of number
Frequently, do not have wireless communication signals to bring great inconvenience to operation, even threaten the personal safety of personnel.
The method of existing solution cable tunnel voice communication has two kinds: one to be to lay telephone cable along tunnel, arranges
Plain old telephone；It is additionally to add gain antenna at a certain distance, it is achieved local wireless covers.
There is following several serious problem in the method for mesh first two cable tunnel voice communication:
1. both of which is it cannot be guaranteed that operations staff can keep contacting with the external world at any time, needs to walk to phone point
Or get in touch with extraneous at gain antenna.
2. the trouble point that cable run is maked an inspection tour is the most distributed, and cable upkeep operation position is not fixed, and stops
Power transmission is required for repeatedly confirming, two ways is difficult to meet requirement.
3. the requirement of communication when telephone can not meet multiple spot operation, communication distance is the most restricted.
4. gain antenna poor effect in tunnel, owing to cable tunnel is unlike vcehicular tunnel, in it cross section little,
The big corner of the gradient is many, electromagnetic environment severe, and radio signal propagation distance is had a greatly reduced quality.
Therefore, it is necessary to design a kind of novel mobile communication system for cable tunnel.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of mobile communication system for cable tunnel,
This mobile communication system being used for cable tunnel is easy to implement, and signal coverage rate is high.
The technical solution of utility model is as follows:
A kind of mobile communication system for cable tunnel, including antenna, repeater and leakage cable；Reveal electricity
Cable is arranged in cable tunnel；
Antenna, repeater and leakage cable are sequentially connected；
Antenna and repeater are multiple；Multiple antennas all use fan antenna；
Reveal the wireless signal covering cable tunnel that cable sends so that be positioned at the mobile electricity in space, cable tunnel
Words can use this wireless signal and other mobile phones in space, cable tunnel and carry out wireless with the external world
Communication.
Described antenna and repeater are 3 sets；The described mobile communication system for cable tunnel also includes closing
Road device and 3 anti-interference unit；
3 antennas, 3 repeaters and 3 anti-interference unit are divided into 3 groups thus form 3 communication leg, and 3
Bar communication leg is connected with 3 branch port of combiner respectively；The conjunction road port of combiner and leakage electricity
Cable is connected；
Every communication leg includes antenna, repeater and the anti-interference unit being sequentially connected, anti-interference unit also with
The branch port of combiner is connected.
Article 3, communication leg is respectively used to carry out channel radio with the base station of China Mobile, China Telecom and CHINAUNICOM
Letter.
Combiner includes a Ge He road shunt module, 3 interface modules and 3 isolation modules；3 interfaces
Module and 3 isolation modules are divided into three groups, and each group includes an interface module and an isolation module,
Interface module is connected with closing road shunt module by isolation module.
Combiner, repeater and anti-interference unit are the universal product
Combiner is provided with fiber optic stretch interface.
For the length cable tunnel much larger than 2.5km, light is set at 2.5km and puts station, light Fang Zhanyuhe road
Fiber optic stretch interface on device is connected by optical fiber.
This utility model uses leakage cable to send the wireless signal for covering cable tunnel, in order to cable tunnel
Interior mobile phone can use radio communication function；Use 3 communications being respectively directed to 3 big operators
Road is connected with shunt so that has whole network wireless signal in cable tunnel and covers.
Light is put station and is connected by optical fiber with the fiber optic stretch interface on combiner, with extended wireless signal cover.
This utility model relates to antenna and repeater, anti-interference unit, combiner, leaky cable and radio frequency draw
Remote device.
Tissue for the mobile communication system (also known as mobile communication covering system in cable tunnel) of cable tunnel
Scheme such as Fig. 1, below each several part be introduced:
1. antenna, repeater and anti-interference unit are arranged at gateway, tunnel or ventilation shaft, and antenna is arranged should expire
Foot signal intensity, angle requirement, repeater and anti-interference unit are arranged together with other Tunnel automation equipment
And shared power supply etc., complete the reception of public network movable signal, launch and modulate；Mobile phone in tunnel receives signal
Time, it is that this signal transfers wire signal in the cable for receiving operator's signal by repeater and antenna system
Transmission, then sent wireless signal by mobile phone reception by revealing cable；Mobile phone in tunnel sends the process of signal:
Mobile phone signal is transmitted to repeater by coaxial cable, and repeater transmits a signal to base station again.In view of existing rank
The working frequency range of section 3 big operators is relatively near, the problem that may there is certain interference.According to experimental data and outfield
Make an uproar at the bottom of isolation between antennas test report, and GSM1800 and TD-SCDMA system contrast test report: two are
Should ensure that between system that isolation reaches 40dB, just can substantially eliminate interference problem.In cable tunnel engineering, this reality
Being that sector mode is arranged with novel middle antenna, the spacing between three fan antennas that same tunnel face is arranged is wanted
Ask: level interval >=2m, if condition does not possesses, in particular cases can >=1.5m.Vertical interval (on
Layer antenna lower edge and lower floor's antenna upper limb) >=1.0m, in particular cases can >=0.5m.
When ensureing distance installed above and angle requirement, through simulation calculation, can tentatively ensure isolation of system degree
At 80dB, meet theoretical insulated degree requirement.
2. combiner is multi-information source combiner, has been used for the merging modulation of Ji great operator signal, finally real
Now leaky cable transmits.
This utility model uses multichannel to close road set composite, and combiner front end is interface module, this utility model
The corresponding 3 big operators of 3 interface modules are configured, with the carrier such as antenna and repeater in conjunction with China's mobile communication present situation
Carry out signal mutual.
Be connected with above-mentioned interface module lower end is isolation module, and its effect is by input signal is manufactured one
Fixed insertion loss, thus realize the purpose of isolation, it is ensured that isolation.
3 road signals are incorporated into 1 tunnel by Tu2Wei He road shunt module time descending, output is to leaky cable system；
Time up, 1 road leaky cable signal is shunted to 3 tunnels and is transferred to combiner isolation module.
3. leaky cable is arranged in top layer cable bearer outer, cable tunnel, completes the transmission of signal and wireless
Penetrating, tunnel whole process lays single leaky cable, it is achieved tunnel radio communication all standing.
This utility model uses the leakage coaxial cable designed for special frequency range, in the specific frequency of operator
Under the 2100MHz such as i.e. TD-CDMA and WCDMA, transmission performance is optimal, the loss leakage of usual fixed frequency leaky cable
Attenuation constant α letting out coaxial cable is 21dB/KM, can be further according to Simple Calculation: system loss is α
Max.=α s+M=α × L+Lc+M then L=(α max.-Lc-M) ÷ α, as a example by 2100Mhz,
Considering surplus M=15dB, coupling loss Lc=75, the when of design maximum system loss α max.=135dB,
Draw L=(135dB-75dB-15dB) ÷ 21dB/KM=2.14km；
By above theory analysis, the theoretical effectively coverage distance of monomer system is about 2.14km, it is contemplated that tunnel
Road close dome structure itself leaky cable coupling performance is helped increasing effect, actual transmissions Distance Theory value up to
About 2.5km, can meet the requirement of cable tunnel, most cities.
4. it is much larger than the speciality cable tunnel of 2.5km for length, fiber optic stretch can be used or separately set some skies
Wire system solves mobile communication covering problem in tunnel, and wherein fiber optic stretch is i.e. in 2.5km outer correct position configuration
Light puts station (luminous power amplifying device), with the combiner described in intelligent acess.
Beneficial effect:
Mobile communication system for cable tunnel of the present utility model, final purpose is to make electric power operation maintenance personnel
Can keep and the external world or get in touch with each other, the signal pooling function of integrated three big operators, by by real-time online
Economic single cable mode realizes tunnel signal all standing.
With existing Technical comparing, the utility model has the advantages that:
1, communicate in completing tunnel with single leaky cable of low cost all standing.
2, combine national conditions and cross section, cable tunnel, select rational three road combiners, select letting out of economical rationality
Electric leakage cable leakage spacing, meets the tunnel demand to wireless signal；
3, great convenience operation maintenance personnel and communication exchanges in extraneous and tunnel, the ring severe in tunnel
Border has ensured the personal safety of personnel.
4, during product may extend to city integrated piping lane.
Accompanying drawing explanation
Fig. 1 is the population structure schematic diagram of the mobile communication system for cable tunnel；
Fig. 2 is the structural representation of shunt.
Detailed description of the invention
Below with reference to the drawings and specific embodiments, this utility model is described in further details:
Embodiment 1:
Such as Fig. 1-2, a kind of mobile communication system for cable tunnel, including antenna, repeater and leakage electricity
Cable；Reveal cable arrangements in cable tunnel；
Antenna, repeater and leakage cable are sequentially connected；
Antenna and repeater are 3；3 antennas are fan antenna；
Reveal the wireless signal covering cable tunnel that cable sends so that be positioned at the mobile electricity in space, cable tunnel
Words can use this wireless signal and other mobile phones in space, cable tunnel and carry out wireless with the external world
Communication.
Described antenna and repeater are 3 sets；The described mobile communication system for cable tunnel also includes closing
Road device and 3 anti-interference unit；
3 antennas, 3 repeaters and 3 anti-interference unit are divided into 3 groups thus form 3 communication leg, and 3
Bar communication leg is connected with 3 branch port of combiner respectively；The conjunction road port of combiner and leakage electricity
Cable is connected；
Every communication leg includes antenna, repeater and the anti-interference unit being sequentially connected, anti-interference unit also with
The branch port of combiner is connected.
Article 3, communication leg is respectively used to carry out channel radio with the base station of China Mobile, China Telecom and CHINAUNICOM
Letter, it is achieved information is mutual.
Combiner includes a Ge He road shunt module, 3 interface modules and 3 isolation modules；3 interfaces
Module and 3 isolation modules are divided into three groups, and each group includes an interface module and an isolation module,
Interface module is connected with closing road shunt module by isolation module.
Combiner, repeater and anti-interference unit are the universal product
Combiner is provided with fiber optic stretch interface.
For the length cable tunnel much larger than 2.5km, light is set at 2.5km and puts station, light Fang Zhanyuhe road
Fiber optic stretch interface on device is connected by optical fiber.
This utility model uses leakage cable to send the wireless signal for covering cable tunnel, in order to cable tunnel
Interior mobile phone can use radio communication function；Use 3 communications being respectively directed to 3 big operators
Road is connected with shunt so that has whole network wireless signal in cable tunnel and covers.
Light is put station and is connected by optical fiber with the fiber optic stretch interface on combiner, with extended wireless signal cover.
Claims (6)
1. the mobile communication system for cable tunnel, it is characterised in that include antenna, repeater and leakage cable；Reveal cable arrangements in cable tunnel；
Antenna, repeater and leakage cable are sequentially connected；
Antenna and repeater are multiple；Multiple antennas all use fan antenna；
Reveal the wireless signal covering cable tunnel that cable sends.
Mobile communication system for cable tunnel the most according to claim 1, it is characterised in that described antenna and repeater are 3 sets；The described mobile communication system for cable tunnel also includes combiner and 3 anti-interference unit；
3 antennas, 3 repeaters and 3 anti-interference unit are divided into 3 groups thus form 3 communication leg, and 3 communication leg are connected with 3 branch port of combiner respectively；The conjunction road port of combiner is connected with revealing cable；
Every communication leg includes antenna, repeater and the anti-interference unit being sequentially connected, and anti-interference unit is also connected with the branch port of combiner.
Mobile communication system for cable tunnel the most according to claim 2, it is characterised in that 3 communication leg are respectively used to carry out radio communication with the base station of China Mobile, China Telecom and CHINAUNICOM.
Mobile communication system for cable tunnel the most according to claim 2, it is characterised in that combiner includes a Ge He road shunt module, 3 interface modules and 3 isolation modules；3 interface modules and 3 isolation modules are divided into three groups, and each group includes an interface module and an isolation module, and interface module is connected with closing road shunt module by isolation module.
5. according to the mobile communication system for cable tunnel described in any one of claim 2-4, it is characterised in that combiner is provided with fiber optic stretch interface.
Mobile communication system for cable tunnel the most according to claim 5, it is characterised in that be more than the cable tunnel of 2.5km for length, arrange light and put station at 2.5km, light is put station and is connected by optical fiber with the fiber optic stretch interface on combiner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620041428.5U CN205491175U (en) | 2016-01-15 | 2016-01-15 | A mobile communication system for cable tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620041428.5U CN205491175U (en) | 2016-01-15 | 2016-01-15 | A mobile communication system for cable tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205491175U true CN205491175U (en) | 2016-08-17 |
Family
ID=56669468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620041428.5U Expired - Fee Related CN205491175U (en) | 2016-01-15 | 2016-01-15 | A mobile communication system for cable tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205491175U (en) |
-
2016
- 2016-01-15 CN CN201620041428.5U patent/CN205491175U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |