CN207460186U - A kind of GPS digital optic-fiber repeater near-end machines of high reliability railway applications - Google Patents
A kind of GPS digital optic-fiber repeater near-end machines of high reliability railway applications Download PDFInfo
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- CN207460186U CN207460186U CN201721562249.7U CN201721562249U CN207460186U CN 207460186 U CN207460186 U CN 207460186U CN 201721562249 U CN201721562249 U CN 201721562249U CN 207460186 U CN207460186 U CN 207460186U
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Abstract
The utility model provides a kind of GPS digital optic-fiber repeater near-end machines of high reliability railway applications, including primary circuit and extension wire, every circuit includes sequentially connected near-end machine wave filter, low noise LNA and the near-end machine data intermediate frequency module containing frequency conversion, wherein active and standby near-end machine wave filter is connected with GPS antenna, the active and standby near-end machine data intermediate frequency module containing frequency conversion is connected by optical fiber with remote termination, is connected between the active and standby near-end machine data intermediate frequency module containing frequency conversion by optical fiber.The utility model solves GPS signal covering problem in indoor and tunnel, supports a variety of networking modes, star-like, chain, ring-like and mixed type networking provide DC5V~12V/200m for customization GPS active antennas and feed radio frequency interface using customization GPS active antennas.
Description
Technical field
The utility model is related to GPS communication system fields, are specifically a kind of GPS digital fibers of high reliability railway applications
Repeater near-end machine.
Background technology
Chinese Railway is constantly in the high speed development stage at present, and train quantity constantly increases, so having created multiple motor-cars
Marshalling yard.
Motor-car goes out that storage checks and when part is organized into groups carries out indoors, but interior can not receive GPS signal, to motor-car and
Compartment positioning can not be carried out effectively.
In addition, train also can not can receive GPS positioning signal for a long time in major long tunnel, therefore GPS tracking can not be carried out
With positioning, the hidden danger to train safety belt.
To meet the GPS signal covering in indoor and tunnel, repeater was simulated using GPS in the past and was asked to solve feeble field covering
Topic, but there are following problems for simulation repeater：1. demand fiber resource is more；2. near-end machine can not multi-stage cascade remote termination；
3. fibre loss is affected to remote termination output power；4. the time delay between each remote station can not be compensated, can not inhibit more
Footpath, there are the problems such as multi-path jamming between each distal end.It is inconvenient that some are brought in actual application.
In conclusion GPS digital optical fiber direct stations solve the problems, such as that simulation repeater exists, it is significantly more efficient to meet interior
With the GPS signal covering in tunnel.GPS near-end machines are important components in GPS digital optical fiber repeater systems, are mainly responsible for
The GPS signal received is subjected to data processing and electrical/optical conversion reaches GPS remote terminations.
Utility model content
The utility model provides a kind of GPS numbers of high reliability railway applications to solve problem of the prior art
End of optical fiber repeater machine using customization GPS active antennas, solves GPS signal covering problem in indoor and tunnel, supports
A variety of networking modes, star-like, chain, ring-like and mixed type networking provide DC5V~12V/200m feedbacks for customization GPS active antennas
Electric radio frequency interface.
The utility model includes primary circuit and extension wire, and every circuit includes sequentially connected near-end machine and filters
Device, low noise LNA and the near-end machine data intermediate frequency module containing frequency conversion, wherein active and standby near-end machine wave filter is connected with GPS antenna,
The active and standby near-end machine data intermediate frequency module containing frequency conversion is connected by optical fiber with remote termination, in the active and standby near-end machine number containing frequency conversion
It is connected between frequency module by optical fiber.
Each module is respectively connected with near-end machine main power supply module and the active and standby MCU controls mould of near-end machine in the near-end machine
Block.
The active and standby near-end machine data intermediate frequency module containing frequency conversion is connected by optical module with optical fiber.
The utility model advantageous effect is：
1. support a variety of networking modes, star-like, chain, ring-like and mixed type networking.
2. using key modules redundancy backup mode, spare module is automatically switched to after primary module failure, such as power supply mould
Block, control unit, power amplifier module and data intermediate frequency module（Containing frequency conversion）, low noise etc..
3. possessing 2 road redundancy reception modes, the equipment quality of reception is improved.
4. support several remote terminations of cascade.
5. supporting remote upgrade function, webmastering software supports remote upgrade function, upgrades software convenient for engineering.
Description of the drawings
Fig. 1 is GPS digital optic-fiber repeater near-end machine topological diagrams.
Fig. 2 is the star-like networking diagram of GPS digital optical fiber direct stations.
Fig. 3 is GPS digital optical fiber direct station ring-shaped network figures.
Specific embodiment
The utility model is described further with reference to the accompanying drawings and detailed description.
As shown in Figure 1, including primary circuit and extension wire, every circuit includes connecting successively the utility model topological diagram
Near-end machine wave filter, low noise LNA and the near-end machine data intermediate frequency module containing frequency conversion connect, wherein active and standby near-end machine wave filter is equal
It is connected with GPS antenna, the active and standby near-end machine data intermediate frequency module containing frequency conversion is connected by optical fiber with remote termination, active and standby to contain frequency conversion
Near-end machine data intermediate frequency module between connected by optical fiber.
Each module is respectively connected with near-end machine main power supply module and the active and standby MCU controls mould of near-end machine in the near-end machine
Block.
The active and standby near-end machine data intermediate frequency module containing frequency conversion is connected by optical module with optical fiber.
Networking mode between the near-end machine and remote termination is star-like（As shown in Figure 2）, chain or ring-like（Such as Fig. 3
It is shown）.
The key technical indexes：
(1) frequency range：1575.42 MHz±2 MHz；
(2) input impedance：50 Ohm；
(3) maximum gain：50±3dB；
(4) gain-adjusted：0~30dB；
(5) range of time-lag settings：100 μ s of ＞；
(6) noise coefficient：≤ 4dB；
(7) inband flatness：≤1.5dB（p-p）；
(8) input and output standing wave（VSWR）：≤ 1.4；
(9) equipment interface form：N-K；
(10) antenna supplies electricity output:DC5~12V/200mA；
（11）Ring-like switching time is not more than 10s.
Power supply and environmental requirement：
（1）Power requirement：
1) power：Exchange AC220V, fluctuation range：AC154~286V；50Hz±5Hz；
Or direct current DC48V, fluctuation range：DC-40~-57V；
2）Power connection uses aviation plug；
3）With input overvoltage protection, output over-voltage protection, output overcurrent protection；
（2）Working environment：- 25 DEG C~+55 DEG C；
EMC Requirements：EMC Requirements should meet 24338.5 relevant regulations of GB/T.
Security requirement：
Ground connection：Cabinet has earth stud.
Dielectric strength：
Power interface：Insulate pressure-resistant >=1500V.
Communication, detection interface：Insulate pressure-resistant >=1000V.
Electromagnetism interference：
Power interface：There are antisurge, anti-peak voltage, anti thunder strike circuit protection.
Communication, detection interface：There are antisurge, anti-peak voltage, anti thunder strike circuit protection.
Safeguard protection：
Power interface：Input overvoltage protection, output over-voltage protection, output overcurrent protection.
Communication, detection interface：There is insulation blocking.
The cable interface of equipment is damaged in order to prevent, it is desirable that has cable joint protector.
There are many utility model concrete application approach, and the above is only the preferred embodiment of the utility model, should
It points out, for those skilled in the art, on the premise of the utility model principle is not departed from, can also make
Go out several improvement, these improvement also should be regarded as the scope of protection of the utility model.
Claims (3)
1. a kind of GPS digital optic-fiber repeater near-end machines of high reliability railway applications, it is characterised in that：Including primary circuit and
Extension wire, every circuit include in sequentially connected near-end machine wave filter, low noise LNA and near-end machine number containing frequency conversion
Frequency module, wherein active and standby near-end machine wave filter is connected with GPS antenna, the active and standby near-end machine data intermediate frequency module containing frequency conversion is logical
It crosses optical fiber to be connected with remote termination, be connected between the active and standby near-end machine data intermediate frequency module containing frequency conversion by optical fiber.
2. the GPS digital optic-fiber repeater near-end machines of high reliability railway applications according to claim 1, feature exist
In：Each module is respectively connected with near-end machine main power supply module and the active and standby MCU control module of near-end machine in the near-end machine.
3. the GPS digital optic-fiber repeater near-end machines of high reliability railway applications according to claim 1, feature exist
In：The active and standby near-end machine data intermediate frequency module containing frequency conversion is connected by optical module with optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721562249.7U CN207460186U (en) | 2017-11-21 | 2017-11-21 | A kind of GPS digital optic-fiber repeater near-end machines of high reliability railway applications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721562249.7U CN207460186U (en) | 2017-11-21 | 2017-11-21 | A kind of GPS digital optic-fiber repeater near-end machines of high reliability railway applications |
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| Publication Number | Publication Date |
|---|---|
| CN207460186U true CN207460186U (en) | 2018-06-05 |
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| CN201721562249.7U Active CN207460186U (en) | 2017-11-21 | 2017-11-21 | A kind of GPS digital optic-fiber repeater near-end machines of high reliability railway applications |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917421A (en) * | 2020-08-12 | 2020-11-10 | 广州市瀚云信息技术有限公司 | 5G signal radio frequency conversion distribution system and coverage unit air interface synchronization method thereof |
-
2017
- 2017-11-21 CN CN201721562249.7U patent/CN207460186U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111917421A (en) * | 2020-08-12 | 2020-11-10 | 广州市瀚云信息技术有限公司 | 5G signal radio frequency conversion distribution system and coverage unit air interface synchronization method thereof |
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