CN207460187U - A kind of GPS digital optical fiber direct station remote terminations of high reliability railway applications - Google Patents
A kind of GPS digital optical fiber direct station remote terminations of high reliability railway applications Download PDFInfo
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- CN207460187U CN207460187U CN201721562628.6U CN201721562628U CN207460187U CN 207460187 U CN207460187 U CN 207460187U CN 201721562628 U CN201721562628 U CN 201721562628U CN 207460187 U CN207460187 U CN 207460187U
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Abstract
The utility model provides a kind of GPS digital optical fiber direct station remote terminations of high reliability railway applications, including the active and standby remote termination data intermediate frequency module containing frequency conversion connected by combiner and active and standby power amplifier, wherein, active and standby power amplifier passes sequentially through RF switch and remote termination wave filter is connected with retransmitting antenna, it is connected between the active and standby remote termination data intermediate frequency module containing frequency conversion of remote termination by optical fiber, the active and standby remote termination data intermediate frequency module containing frequency conversion of each remote termination is connected with near-end machine by optical fiber or is connected with the remote termination data intermediate frequency module containing frequency conversion in adjacent remote termination.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 remote termination.
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 remote terminations are important components in GPS digital optical fiber repeater systems, and GPS is near
Terminal, which is transmitted through the GPS signal come, to carry out the digital processings such as optical electrical conversion, frequency conversion and DA and recovers GPS signal, send to antenna-feeder system into
Row feeble field covers.
Utility model content
The utility model provides a kind of GPS numbers of high reliability railway applications to solve problem of the prior art
Optical fiber repeater far-end 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 the active and standby remote termination data intermediate frequency module containing frequency conversion connected by combiner and active and standby work(
Rate amplifier, wherein, active and standby power amplifier passes sequentially through RF switch and remote termination wave filter is connected with retransmitting antenna, distal end
Connected between the active and standby remote termination data intermediate frequency module containing frequency conversion of machine by optical fiber, each remote termination it is active and standby containing the remote of frequency conversion
Terminal data intermediate frequency module be connected with near-end machine by optical fiber or with the remote termination number containing frequency conversion in adjacent remote termination
Ifd module connects.
Module is respectively connected with remote termination main power supply module and the active and standby MCU control module of remote termination in the remote termination.
The active and standby remote termination data intermediate frequency module containing frequency conversion is connected by optical module with optical fiber.
The utility model advantageous effect is：
1. having the function of time delay adjustment, range of time-lag settings is not less than 100 μ s；
2. supporting remote upgrade function, webmastering software supports remote upgrade function, upgrades software convenient for engineering；
3. support a variety of networking modes, star-like, chain, ring-like and mixed type networking；
4. meeting degree of protection for IP55 requirements, outdoor mounted is supported；
6. 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.；
7. possessing 2 road redundancy reception modes, the equipment quality of reception is improved；
8. support several remote terminations of cascade.
Description of the drawings
Fig. 1 is GPS digital optical fiber direct station remote termination 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.
The utility model topological diagram is as shown in Figure 1, the active and standby remote termination number containing frequency conversion including being connected by combiner
Ifd module and active and standby power amplifier, wherein, active and standby power amplifier pass sequentially through RF switch and remote termination wave filter with
Retransmitting antenna connects, and is connected between the active and standby remote termination data intermediate frequency module containing frequency conversion of remote termination by optical fiber, each distal end
The active and standby remote termination data intermediate frequency module containing frequency conversion of machine be connected by optical fiber with near-end machine or in adjacent remote termination
Remote termination data intermediate frequency module connection containing frequency conversion.
Module is respectively connected with remote termination main power supply module and the active and standby MCU control module of remote termination in the remote termination.
The active and standby remote termination 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）.
Installation and structural requirement：
(1) equipment interface cabling is using downward cabling mode, so that wall built-up is installed；
(2) adverse circumstances and unattended operating condition in this functional adaptation tunnel, cabinet use hermetically sealed shell,
Degree of protection supports IP55, and volume and weight is tried one's best small and light；
(3) electromagnetic compatibility shielding requirement is met, power connection uses waterproof Aviation Connector, band shield gasket function；
(4) chassis design is reasonable, is easily installed, and is suitble to the mounting means such as wall built-up, cabinet；
(5) there is various optical interfaces, such as FC/PC, FC/APC etc..
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) peak power output：40dBm±2dBm、30dBm±2dBm、20dBm±2dBm、10dBm±2dBm、0dBm
± 2dBm etc. is not limited to above-mentioned peak power output value；
(6) ALC control ranges：≥15dBm；
(7) propagation delay time：≤ 15μs；
(8) range of time-lag settings：100 μ s of ＞；
(9) inband flatness：≤1.5dB（p-p）；
(10) input and output standing wave（VSWR）：≤ 1.4 .
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 optical fiber direct station remote terminations of high reliability railway applications, it is characterised in that：Including passing through combiner
The active and standby remote termination data intermediate frequency module containing frequency conversion of connection and active and standby power amplifier, wherein, active and standby power amplifier is successively
It is connected by RF switch and remote termination wave filter with retransmitting antenna, the active and standby remote termination digital intermediate frequency mould containing frequency conversion of remote termination
It is connected between block by optical fiber, the active and standby remote termination data intermediate frequency module containing frequency conversion of each remote termination passes through optical fiber and near-end machine
Connection is connected with the remote termination data intermediate frequency module containing frequency conversion in adjacent remote termination.
2. the GPS digital optical fiber direct station remote terminations of high reliability railway applications according to claim 1, feature exist
In：Module is respectively connected with remote termination main power supply module and the active and standby MCU control module of remote termination in the remote termination.
3. the GPS digital optical fiber direct station remote terminations of high reliability railway applications according to claim 1, feature exist
In：The active and standby remote termination 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 |
|---|---|---|---|
| CN201721562628.6U CN207460187U (en) | 2017-11-21 | 2017-11-21 | A kind of GPS digital optical fiber direct station remote terminations of high reliability railway applications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721562628.6U CN207460187U (en) | 2017-11-21 | 2017-11-21 | A kind of GPS digital optical fiber direct station remote terminations of high reliability railway applications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207460187U true CN207460187U (en) | 2018-06-05 |
Family
ID=62277604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721562628.6U Active CN207460187U (en) | 2017-11-21 | 2017-11-21 | A kind of GPS digital optical fiber direct station remote terminations of high reliability railway applications |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207460187U (en) |
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2017
- 2017-11-21 CN CN201721562628.6U patent/CN207460187U/en active Active
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