CN204832526U - Locomotive big dipper satellite, GPS dual -mode locating system - Google Patents
Locomotive big dipper satellite, GPS dual -mode locating system Download PDFInfo
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- CN204832526U CN204832526U CN201520524765.5U CN201520524765U CN204832526U CN 204832526 U CN204832526 U CN 204832526U CN 201520524765 U CN201520524765 U CN 201520524765U CN 204832526 U CN204832526 U CN 204832526U
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Abstract
The utility model relates to a locomotive big dipper satellite, GPS dual -mode locating system. The satellite positioning system that CIR used passes through GPS module serial ports and directly links to each other with the main control unit, has restricted the dual -mode locating system and has sent the unanimity for positioning data with the existing positioning unit positioning data of master control. The utility model discloses in, MCU microcontroller AVR carries out the initialization of GPS+BD2 bimodulus module, the main control unit sends to GPS+BD2 bimodulus module through MCU microcontroller AVR and sets up the order data, location information data is sent to MCU microcontroller AVR to GPS+BD2 bimodulus module, through forwardding to the main control unit of conversion, without forwardding to the original data port of front panel of conversion, the public data port of front panel is directly forwardded to the public data of main control unit. The utility model discloses have the two cover location navigation station keeping ability of big dipper satellite, GPS satellite, reliability, stability, accuracy nature are higher, can work under single GPS location, single BD2 location, GPS+BD2 jointly fix a position three kinds of mode, are convenient for carry on mode switch and contrast experiment.
Description
Technical field
The utility model belongs to railway communication technical field, is specifically related to a kind of locomotive big-dipper satellite, GPS dual-mode positioning system.
Background technology
The global position system of the cab integrated radio communication that current locomotive is installed adopts GPS of America mostly, and be responsible for providing common location information, wherein clock information is as the standard time clock of equipment.
Triones navigation system is the GPS (Global Position System) of China's independent research, independent operating, from the angle safeguarding national information safety, in the urgent need to the global position system of the development Big Dipper, GPS dual-mode, location can be made more reliable, precision is higher, for system-wide locomotive provides safe and reliable product.
The global position system that current CIR uses is all directly be connected with main control unit serial ports by GPS module serial ports, and namely gps data passes to main control unit, is carried out the extraction of follow-up longitude and latitude and time by main control unit; Front panel raw data is that GPS module directly sends, and front panel public data is sent by main control unit, and power supply is 96pin pin 5V power taking, non-transformer Redundancy Design, concrete structure is see Fig. 1.This system architecture is for main control unit and raw data mouth provide the primary data information (pdi) of GPS module, provide path to public data mouth for main control unit with regard to determining the function of positioning system.Meanwhile, also limit bimodulus positioning system and send to the consistent of the locator data of master control and existing positioning unit locator data.
Utility model content
The purpose of this utility model is to provide a kind of locomotive big-dipper satellite, GPS dual-mode positioning system, solving prior art adopts single GPS to locate Problems existing, the gps satellite positioning unit in CIR can be replaced by GPS+BD2(GPS of America+Big Dipper 2) dual mode satellite positioning unit.
The technical scheme that the utility model adopts is:
Locomotive big-dipper satellite, GPS dual-mode positioning system, is characterized in that:
Comprise GPS+BD2 bimodulus module, MCU microcontroller AVR, main control unit and front panel;
GPS+BD2 bimodulus module access MCU microcontroller AVR, MCU microcontroller AVR accesses main control unit;
MCU microcontroller AVR accesses raw data port and the public data port of front panel.
Described MCU microcontroller AVR expands 5 serial port extended chip GM8125 by 1 and is connected with 4 serial ports, is respectively:
Master control serial ports, Transistor-Transistor Logic level, speed 9600bps, form 8N1;
GPS+BD2 bimodulus module serial ports, Transistor-Transistor Logic level, speed 9600bps, form 8N1;
Front panel raw data serial ports, RS422 level, speed 9600bps, form 8N1, adopt SP2490 chip to carry out the level conversion of RS422 and TTL;
Front panel public data serial ports, RS422 level, speed 9600bps, form 8N1, adopt SP2490 chip to carry out the level conversion of RS422 and TTL.
Described GPS+BD2 bimodulus module is UM220 and TD3020C Dual module.
The power supply aspect of system adopts 96pin pin 12V and 5V pair to draw electricity, redundant power supply, is connected with main control unit;
Adopt TITPS5430 power supply chip to transfer 12V to 5V, adopt MicrelIncMIC37302 power supply chip to transfer 5V to 3.3V.
The utility model has the following advantages:
The positioning system that the utility model relates to receives the signal of GPS and BD2 two satellite systems, thus two different satellite systems can be utilized to carry out time service and location, there is big-dipper satellite, gps satellite two cover Position Fixing Navigation System station-keeping ability, there is higher reliability, stability, accuracy, single GPS can be operated in locate, single BD2 location, under GPS+BD2 co-located three kinds of mode of operations, be convenient to carry out pattern switching and contrast experiment, wherein can ensure time service under GPS+BD2 co-located pattern, the accuracy of location and continuity, it is the acquiescence operational mode of system.
Can predict, locomotive big-dipper satellite, GPS dual-mode positioning system will be more widely used in railway security monitoring system; Simultaneously, although independent big-dipper satellite location is fast not as good as GPS location on warm start positioning time, but also still can provide accurate, stable positional information and clock information for locomotive in actual use, use big-dipper satellite to locate separately and still can complete transport task smoothly.
Accompanying drawing explanation
Fig. 1 is existing global position system block diagram.
Fig. 2 is bimodulus positioning system block diagram of the present invention.
Fig. 3 is data flowchart of the present invention.
Fig. 4 is power unit circuit diagram.
Fig. 5 is MCU microcontroller AVR circuit diagram.
Fig. 6 is GPS+BD2 bimodulus module circuit diagram.
Embodiment
Below in conjunction with embodiment, the utility model is described in detail.
The locomotive big-dipper satellite that the utility model relates to, GPS dual-mode positioning system, the signal of GPS and BD2 two satellite systems can be received, thus utilize two different satellite systems to carry out time service and location, consider the data needing GPS+BD2 bimodulus module data to be converted to original GPS module form, add a MCU microcontroller AVR, be used for carrying out data conversion.
System specifically comprises GPS+BD2 bimodulus module, MCU microcontroller AVR, main control unit and a few part of front panel.GPS+BD2 bimodulus module access MCU microcontroller AVR, MCU microcontroller AVR accesses main control unit; MCU microcontroller AVR accesses raw data port and the public data port of front panel.
Described MCU microcontroller AVR expands 5 serial port extended chip GM8125 by 1 and is connected with 4 serial ports, is respectively:
Master control serial ports, Transistor-Transistor Logic level, speed 9600bps, form 8N1;
GPS+BD2 bimodulus module serial ports, Transistor-Transistor Logic level, speed 9600bps, form 8N1;
Front panel raw data serial ports, RS422 level, speed 9600bps, form 8N1, adopt SP2490 chip to carry out the level conversion of RS422 and TTL;
Front panel public data serial ports, RS422 level, speed 9600bps, form 8N1, adopt SP2490 chip to carry out the level conversion of RS422 and TTL.
Described GPS+BD2 bimodulus module is UM220 and TD3020C Dual module.
The power supply aspect of system adopts 96pin pin 12V and 5V pair to draw electricity, redundant power supply, is connected, provides power supply to supply to greatest extent with main control unit.Adopt TITPS5430 power supply chip to transfer 12V to 5V, adopt MicrelIncMIC37302 power supply chip to transfer 5V to 3.3V.
The concrete localization method of above-mentioned locomotive big-dipper satellite, GPS dual-mode positioning system, is realized by following steps:
After system electrification, MCU microcontroller AVR carries out the initialization task of GPS+BD2 bimodulus module;
Main control unit sends setting command data through MCU microcontroller AVR to GPS+BD2 bimodulus module;
GPS+BD2 bimodulus module sends locating information data to MCU microcontroller AVR, the locating information data retransmission changed through MCU microcontroller AVR is to main control unit, and the locating information data retransmission changed without MCU microcontroller AVR is to the raw data port of front panel;
Be forwarded directly to the public data port of front panel through MCU microcontroller AVR from the public data of main control unit.
System carries out single GPS location by ModeSelect toggle switch, single BD2 locates, GPS+BD2 co-located three kinds of mode of operations switch, and is convenient to carry out pattern switching and contrast experiment.Wherein can ensure time service, the accuracy of location and continuity under GPS+BD2 co-located pattern, be the acquiescence operational mode of system.
The per second output by AVR upgrading mouth of MCU microcontroller AVR forwards statistical information.
The information interaction that foregoing comprises, see Fig. 3, specifically comprises:
1. from the public data process of main control unit
2. the locating information data of main control unit are forwarded to
3. from the locating information data of GPS+BD2 bimodulus module
4. the setting command data of GPS+BD2 bimodulus module are sent to
5. the locating information data of raw data port are sent to
6. the public data of public data port is sent to
7. the forwarding statistical information data of AVR upgrading mouth is sent to
The control that described MCU microcontroller AVR carries out, management:
1, control 1 and expand 5 serial port extended chip GM8125 chips;
2,4 toggle switchs carry out model selection;
3, the RESET of GPS+BD2 bimodulus module controls;
4, antenna is for electro-detection input;
5, antenna connects detection input;
6, JTAG burning program;
7, AVR program upgrade reserves serial ports.
96pin connector is connected with master control, comprising:
1, serial ports, Transistor-Transistor Logic level, speed 9600bps, form 8N1;
2, positioning unit power detecting;
3, antenna connects detection;
4, positioning unit reset signal.
Content of the present utility model is not limited to cited by embodiment, and the conversion of those of ordinary skill in the art by reading the utility model instructions to any equivalence that technical solutions of the utility model are taked, is claim of the present utility model and contains.
Claims (4)
1. locomotive big-dipper satellite, a GPS dual-mode positioning system, is characterized in that:
Comprise GPS+BD2 bimodulus module, MCU microcontroller AVR, main control unit and front panel;
GPS+BD2 bimodulus module access MCU microcontroller AVR, MCU microcontroller AVR accesses main control unit;
MCU microcontroller AVR accesses raw data port and the public data port of front panel.
2. a kind of locomotive big-dipper satellite according to claim 1, GPS dual-mode positioning system, is characterized in that:
Described MCU microcontroller AVR expands 5 serial port extended chip GM8125 by 1 and is connected with 4 serial ports, is respectively:
Master control serial ports, Transistor-Transistor Logic level, speed 9600bps, form 8N1;
GPS+BD2 bimodulus module serial ports, Transistor-Transistor Logic level, speed 9600bps, form 8N1;
Front panel raw data serial ports, RS422 level, speed 9600bps, form 8N1, adopt SP2490 chip to carry out the level conversion of RS422 and TTL;
Front panel public data serial ports, RS422 level, speed 9600bps, form 8N1, adopt SP2490 chip to carry out the level conversion of RS422 and TTL.
3. a kind of locomotive big-dipper satellite according to claim 2, GPS dual-mode positioning system, is characterized in that:
Described GPS+BD2 bimodulus module is UM220 and TD3020C Dual module.
4. a kind of locomotive big-dipper satellite according to claim 3, GPS dual-mode positioning system, is characterized in that:
The power supply aspect of system adopts 96pin pin 12V and 5V pair to draw electricity, redundant power supply, is connected with main control unit;
Adopt TITPS5430 power supply chip to transfer 12V to 5V, adopt MicrelIncMIC37302 power supply chip to transfer 5V to 3.3V.
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| CN201520524765.5U CN204832526U (en) | 2015-07-20 | 2015-07-20 | Locomotive big dipper satellite, GPS dual -mode locating system |
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| CN201520524765.5U CN204832526U (en) | 2015-07-20 | 2015-07-20 | Locomotive big dipper satellite, GPS dual -mode locating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977595A (en) * | 2015-07-20 | 2015-10-14 | 中铁第一勘察设计院集团有限公司 | Locomotive Beidou satellite and GPS dual-mode positioning system and method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977595A (en) * | 2015-07-20 | 2015-10-14 | 中铁第一勘察设计院集团有限公司 | Locomotive Beidou satellite and GPS dual-mode positioning system and method thereof |
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