CN206620128U - The GPS optical fiber repeaters of railway applications - Google Patents
The GPS optical fiber repeaters of railway applications Download PDFInfo
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- CN206620128U CN206620128U CN201621486235.7U CN201621486235U CN206620128U CN 206620128 U CN206620128 U CN 206620128U CN 201621486235 U CN201621486235 U CN 201621486235U CN 206620128 U CN206620128 U CN 206620128U
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- optical fiber
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Abstract
The utility model provides a kind of GPS optical fiber repeaters of railway applications, including the near-end machine and remote termination connected by optical fiber, and near-end machine and remote termination include radio-frequency module, power module and control module；Near-end machine radio-frequency module includes wave filter, low noise amplification module and the optical module being sequentially connected, and wave filter is connected by gps antenna and gps satellite；Remote termination radio-frequency module includes optical module, auto level control/attenuator circuit and the power amplification circuit being sequentially connected, wherein power amplification circuit and retransmitting antenna connection.The utility model uses wireless transmission mode after gps signal wireless receiving, solves gps signal covering in indoor and tunnel.
Description
Technical field
The utility model is related to GPS communication system field, the GPS optical fiber repeaters of specifically a kind of railway applications.
Background technology
Current Chinese Railway is constantly in the high speed development stage, and train quantity constantly increases, so newly-built multiple motor-cars
Marshalling yard.Motor-car goes out storage and checks and carries out indoors when part is organized into groups that 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 receive GPS location signal for a long time in major long tunnel, therefore nothing
Method carries out GPS tracking and positioning, the hidden danger to train safety belt.To meet the gps signal covering in indoor and tunnel, Yi Zhongshi
Answer the GPS optical fiber repeaters of railway applications essential.
Utility model content
The utility model in order to solve problem of the prior art there is provided a kind of GPS optical fiber repeaters of railway applications,
Using wireless transmission mode after gps signal wireless receiving, gps signal covering in indoor and tunnel is solved.
The utility model includes the near-end machine and remote termination connected by optical fiber, and near-end machine and remote termination include radio frequency mould
Block, power module and control module；Near-end machine radio-frequency module includes wave filter, low noise amplification module and the optical module being sequentially connected,
Wave filter is connected by gps antenna and gps satellite；Remote termination radio-frequency module includes optical module, the automatic electric-level control being sequentially connected
System/attenuator circuit and power amplification circuit, wherein power amplification circuit and retransmitting antenna are connected.
Further improve, described near-end machine power module provides DC5V~12V/ by input interface for gps antenna
200mA is fed.
The utility model beneficial effect is：
1. gps signal covering in indoor and tunnel is supported,
2. use light distribution formula networking mode；
3. using customization GPS active antennas；
4. provide DC5V~12V/200mA feed radio frequency interfaces for customization GPS active antennas；
5. it is IP55 requirements to meet degree of protection, outdoor mounted is supported；
If 6. supporting main line optical interface, can access some remote terminations.
Brief description of the drawings
Fig. 1 is the utility model electrical block diagram.
Fig. 2 is the utility model applied topology block diagram.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
The utility model circuit structure as shown in figure 1, near-end machine and remote termination including being connected by optical fiber, near-end machine and
Remote termination includes radio-frequency module, power module and control module；Near-end machine radio-frequency module includes the wave filter, low being sequentially connected
Make an uproar amplification module and optical module, wave filter passes through gps antenna and gps satellite is connected；Remote termination radio-frequency module includes what is be sequentially connected
Optical module, auto level control/attenuator circuit and power amplification circuit, wherein power amplification circuit and retransmitting antenna are connected.Institute
The near-end machine power module stated provides DC5V~12V/200mA feeds by input interface for gps antenna.
TWZ-GPS radio repeater systems include GPS repeaters, GPS Active Receiving Antennas, retransmitting antenna etc..Mainly should
With principle be GPS Active Receiving Antennas by the gps signal received by receiving circuit, filter circuit after, then be amplified by
Gps signal is covered feeble field by retransmitting antenna, and its canonical system applied topology block diagram is as shown in Figure 2.
Functional requirement：
（1）Incoming gps signal is supported, and its signal can effectively be amplified；
（2）Possess perfect protection, alarm function；Locally there is alarm indicator；With local debugging interface and remotely
Monitoring（Network management monitoring）；
（3）With measures such as antisurge, 4 grades of lightning protection, possess overvoltage, excessively stream and short-circuit protection function；
（4）Support the star-like networking mode of optical fiber.
Install and structural requirement：
（1）Equipment interface cabling uses downward cabling mode, so that wall built-up is installed；
（2）Adverse circumstances and unattended condition of work in this functional adaptation tunnel, cabinet use hermetically sealed shell, prevent
Protect grade and support IP55, 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 rationally, is easily installed, and is adapted to the mounting means such as wall built-up, rack；
（5）With various optical interfaces, such as FC/PC, FC/APC etc..
The key technical indexes：
（1）Frequency range（Frequency Range）：1575.42 MHz±2 MHz；
（2）Input impedance（Impedance）： 50 Ohm；
（3）Maximum gain（LNA Gain）：50±3dB；
（4）Gain-adjusted（Gain adjust）0~30dB；
（5）Peak power output（Output Power）： 40dBm±2dBm、30dBm±2dBm、20dBm±2dBm、
10dBm ± 2dBm, 0dBm ± 2dBm etc., are not limited to above-mentioned peak power output value；
（6）ALC control ranges：≥15dBm；
（7）Propagation delay time（Time Delay）：≤ 500ns；
（8）Noise coefficient（Noise Figure）：≤ 4dB；
（9）Inband flatness：≤1.5dB（p-p）；
（10）Input and output standing wave（VSWR）：≤ 1.4；
（11）Equipment interface form：N-K；
（12）Antenna is powered output（Feed Power）:DC5~12V/200mA；
（13）Power consumption（Power Assurance）：≤30W.
Power requirement：
1）Power supply：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；
Working environment：- 25 DEG C~+55 DEG C；
Reliability index：MTBF≥50000h.
EMC Requirements should meet the relevant regulations of GB/T 24338.5.
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 connect
Mouthful：There is insulation blocking.
In order to prevent the cable interface of equipment to be damaged, it is desirable to there is cable joint protector.
The utility model concrete application approach is a lot, and described above is only preferred embodiment of the present utility model, should
Point out, for those skilled in the art, on the premise of the utility model principle is not departed from, can also make
Go out some improvement, these improvement also should be regarded as protection domain of the present utility model.
Claims (2)
1. a kind of GPS optical fiber repeaters of railway applications, it is characterised in that：Including the near-end machine connected by optical fiber and distal end
Machine, near-end machine and remote termination include radio-frequency module, power module and control module；Near-end machine radio-frequency module includes being sequentially connected
Wave filter, low noise amplification module and optical module, wave filter passes through gps antenna and gps satellite and connects；Remote termination radio-frequency module includes
Optical module, auto level control/attenuator circuit and the power amplification circuit being sequentially connected, wherein power amplification circuit and repeating transmission day
Line is connected.
2. the GPS optical fiber repeaters of railway applications according to claim 1, it is characterised in that：Described near-end electromechanical source
Module provides DC5V~12V/200mA feeds by input interface for gps antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621486235.7U CN206620128U (en) | 2016-12-31 | 2016-12-31 | The GPS optical fiber repeaters of railway applications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621486235.7U CN206620128U (en) | 2016-12-31 | 2016-12-31 | The GPS optical fiber repeaters of railway applications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206620128U true CN206620128U (en) | 2017-11-07 |
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ID=60230052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621486235.7U Active CN206620128U (en) | 2016-12-31 | 2016-12-31 | The GPS optical fiber repeaters of railway applications |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206620128U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034811A (en) * | 2019-05-31 | 2019-07-19 | 福建瑞波信息技术有限公司 | Mobile communication indoor signal enhancing device and its Enhancement Method |
-
2016
- 2016-12-31 CN CN201621486235.7U patent/CN206620128U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034811A (en) * | 2019-05-31 | 2019-07-19 | 福建瑞波信息技术有限公司 | Mobile communication indoor signal enhancing device and its Enhancement Method |
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