CN212074042U - Subway train positioning system based on NB-IoT - Google Patents
Subway train positioning system based on NB-IoT Download PDFInfo
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- CN212074042U CN212074042U CN202020767126.2U CN202020767126U CN212074042U CN 212074042 U CN212074042 U CN 212074042U CN 202020767126 U CN202020767126 U CN 202020767126U CN 212074042 U CN212074042 U CN 212074042U
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Abstract
The utility model relates to a subway train positioning system based on NB-IoT, including positioning terminal, control center equipment and NB-IoT cloud server, positioning terminal sets up in the train to through NB-IoT cloud server and control center equipment signal connection; the positioning terminal comprises a first control module, a first communication module and a first power supply module; the control center equipment comprises a second control module, a second communication module, a second power supply module and a liquid crystal display module; the first control module controls the frequency of the first communication module for automatically acquiring the positioning signal and the frequency for sending the position coordinate to the cloud server; the first communication module is used for being in signal connection with at least 3 mobile network base stations, the NB-IoT cloud server is used for wirelessly sending the received coordinate data to the control center equipment, and the control center equipment can control the working state of the positioning terminal. The subway train positioning system can monitor the running condition of a train in real time and accurately monitor the geographical position of the train in high-speed running.
Description
Technical Field
The utility model relates to a subway train location technical field, specific subway train positioning system based on NB-IoT that says so.
Background
When a train automatic control (CBTC) system in charge of subway train operation breaks down or is powered off, the communication between a control center and a subway train is interrupted, a train dispatcher cannot acquire the position of the train, the occurrence probability of rear-end accidents of the train can be increased, the system is a great hidden danger of safe operation of the subway train, and the safety hazard of lives and properties of people can be caused in serious cases. A set of redundant train positioning system which is excellent in performance, safe, reliable and independent of a CBTC system is developed and designed, and the system has great significance for guaranteeing the safety of subway transportation and driving.
Subway trains travel in the tunnel below the ground most of the time, can not receive satellite signals, and GPS and big dipper satellite positioning mode are all not usable. In recent years, researchers have implemented positioning of subway trains by means of RFID technology, sensors, and the like. The subway train positioning based on the cellular mobile network is a good solution, and in recent years, certain research is carried out on the positioning technology based on the cellular mobile network at home and abroad, but research results related to the subway train positioning are few.
Disclosure of Invention
The utility model discloses to not enough among the prior art, provide a subway train positioning system based on NB-IoT, can utilize NB-IoT technique to realize the real time monitoring to the train operation conditions, the geographical position that locates when accurate monitoring train high speed operation shows on the liquid crystal display module in real time.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the subway train positioning system based on NB-IoT is characterized in that a plurality of mobile network base stations are arranged around a train running track, and the system comprises: the subway train positioning system comprises a positioning terminal, control center equipment and an NB-IoT cloud server, wherein the positioning terminal is arranged in a train and is in signal connection with the control center equipment through the NB-IoT cloud server;
the positioning terminal comprises a first control module, a first communication module and a first power supply module;
the control center equipment comprises a second control module, a second communication module, a second power supply module and a liquid crystal display module;
the first communication module is used for being in signal connection with at least 3 mobile network base stations, the first communication module is used for receiving mobile network base station signal data received by the first communication module and processing the signal data to obtain a position coordinate of the positioning terminal, the first communication module is also used for wirelessly sending the position coordinate data to an NB-IoT cloud server, and the first power supply module is used for providing working voltage for the first control module and the first communication module;
the NB-IoT cloud server is used for wirelessly sending the received coordinate data to the second communication module, the second communication module is used for sending the received coordinate data to the second control module, the second control module is used for receiving and processing the coordinate data and sending the coordinate data to the liquid crystal display module, the liquid crystal display module is used for displaying the position of the train, and the second power supply module is used for providing working voltage for the second control module, the second communication module and the liquid crystal display module.
The second control module is further in signal connection with the key module, and the key module is used for controlling the second control module to send a preset control signal to the first communication module through the second communication module and the NB-IoT cloud server, so that the first control module modifies the frequency of the first communication module for automatically acquiring the positioning signal and the frequency of the position coordinate sent to the NB-IoT cloud server.
The mobile network base station is a 4G mobile network base station.
The first power supply module and the second power supply module both adopt LM2596 voltage reduction chips for reducing the input 9V voltage to 5V voltage for output.
The first control module and the second control module both adopt an MSP430F169 singlechip.
The first communication module adopts a SIM7600CE communication chip, the SIM7600CE communication chip is connected with the MSP430F169 singlechip of the first control module through serial port communication signals, and the SIM7600CE communication chip is connected with NB-IoT cloud server wireless signals through NB-IoT wireless communication.
The second communication module adopts a SIM7020C communication chip, the SIM7020C communication chip is connected with the MSP430F169 singlechip of the second communication module through serial port communication signals, and the SIM7020C communication chip is connected with NB-IoT cloud server wireless signals through NB-IoT wireless communication.
The liquid crystal display module adopts an LCD12864 liquid crystal display module, and the LCD12864 liquid crystal display module is in signal connection with the MSP430F169 singlechip of the second communication module.
The utility model relates to a subway train positioning system based on NB-IoT can reach beneficial effect is:
firstly, the system is a redundant train positioning system independent of a CBTC (communication based train control) system, the position of a subway train is detected in real time by utilizing the NB-IoT (base station location) positioning function, data are transmitted to a control center through a wireless communication network, and a control center platform can send out a control command to remotely monitor the running dynamic state of the subway train in real time.
Secondly, the first communication module can be in signal connection with the existing 4G mobile network base station, and the first control module calculates and obtains accurate warp and weft coordinates of the positioning terminal by receiving a plurality of 4G mobile network base station signals; the first communication module can also be in wireless signal connection with the NB-IoT cloud server and is used for sending coordinate data of the positioning terminal to the NB-IoT cloud server or receiving a control instruction signal sent by the NB-IoT cloud server.
Thirdly, under normal working conditions, the positioning terminal continuously updates the real-time coordinate data of the train according to a set period, and when an emergency occurs, the key module controls the second communication module to send out a preset control signal, so that the coordinate data updating period of the positioning terminal is shortened.
Fourthly, the LM2596 voltage reduction chips are adopted by the first power supply module and the second power supply module, the direct current power supply of the environment-friendly 9V alkaline battery can be converted into 5V voltage required by the MSP430F169 single chip microcomputer, the SIM7020C communication chip, the SIM7600CE communication chip and other devices, the system structure is simplified, and the application range of the positioning system can be greatly enlarged.
Drawings
Fig. 1 is a system diagram of a subway train positioning system based on NB-IoT of the present invention.
Fig. 2 is a schematic diagram of a first control module and a second control module in the subway train positioning system based on NB-IoT.
Fig. 3 is a schematic diagram of a first communication module in a subway train positioning system based on NB-IoT.
Fig. 4 is a schematic diagram of a second communication module in the subway train positioning system based on NB-IoT of the present invention.
Fig. 5 is a schematic diagram of the first power module and the second power module in the subway train positioning system based on NB-IoT.
Fig. 6 is a schematic diagram of a liquid crystal display module in a subway train positioning system based on NB-IoT of the present invention.
Reference numerals: 1. positioning a terminal; 2. control center equipment; 3. an NB-IoT cloud server; 4. a first control module; 5. a first communication module; 6. a first power supply module; 7. a second control module; 8. a second communication module; 9. a liquid crystal display module; 10. a second power supply module; 11. a key module.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a subway train positioning system based on NB-IoT, where a plurality of mobile network base stations are arranged around a train traveling track, is characterized in that: the subway train positioning system comprises a positioning terminal 1, a control center device 2 and an NB-IoT cloud server 3, wherein the positioning terminal 1 is arranged in a train, and the positioning terminal 1 is in signal connection with the control center device 2 through the NB-IoT cloud server 3;
the positioning terminal 1 comprises a first control module 4, a first communication module 5 and a first power supply module 6;
the control center equipment 2 comprises a second control module 7, a second communication module 8, a second power supply module 10 and a liquid crystal display module 9;
the first communication module 5 is used for being in signal connection with at least 3 mobile network base stations, the first communication module 5 is used for receiving mobile network base station signal data received by the first communication module 5 and processing the signal data to obtain a position coordinate of the positioning terminal 1, the first communication module 5 is also used for wirelessly sending the position coordinate data to the NB-IoT cloud server 3, and the first power supply module 6 is used for providing working voltage for the first control module 4 and the first communication module 5;
the NB-IoT cloud server 3 is used for wirelessly sending the received coordinate data to the second communication module 8, the second communication module 8 is used for sending the received coordinate data to the second control module 7, the second control module 7 is used for receiving and processing the coordinate data and sending the coordinate data to the liquid crystal display module 9, the liquid crystal display module 9 is used for displaying the position of a train, and the second power supply module 10 is used for supplying working voltage to the second control module 7, the second communication module 8 and the liquid crystal display module 9.
The second control module 7 is further in signal connection with a key module 11, and the key module 11 is used for controlling the second control module 7 to send a preset control signal to the first communication module 5 through the second communication module 8 and the NB-IoT cloud server 3, so that the first control module 4 modifies the frequency of the first communication module 5 for automatically acquiring the positioning signal and the frequency of sending the position coordinate to the NB-IoT cloud server 3.
In this embodiment, the mobile network base stations arranged around the train running track are existing 4G mobile network base stations, and the spatial coordinate positions of the 4G mobile network base stations are known.
In this embodiment, the first control module 4 and the second control module 7 both employ an MSP430F169 single chip microcomputer. The MSP430F169 singlechip has the advantages of low power consumption, independent power supply, high operation speed, ultra-long standby, stable system work and the like.
In this embodiment, the first communication module 5 adopts a SIM7600CE communication chip, the SIM7600CE communication chip is connected with the MSP430F169 singlechip of the first control module 4 through serial communication signals, and the MSP430F169 singlechip can realize control and data processing of the SIM7600CE communication chip; the SIM7600CE communication chip is in signal connection with at least 3 groups of mobile network base stations 4G, generally, the SIM7600CE communication chip can be in signal connection with five groups of mobile network base stations with the most stable signal connection, the SIM7600CE communication chip is in data communication with a plurality of surrounding mobile network base stations, the first control module 4 can calculate the actual distance between the first communication module 5 and each group of mobile network base stations according to the communication data of the first communication module 5 and the mobile network base stations, the actual coordinate position of the first communication module 5 can be calculated by combining the three groups of distance data with the actual coordinate data of each group of mobile network base stations, and further, the data communication with the five groups of mobile network base stations can improve the positioning accuracy.
In this embodiment, the second communication module 8 adopts a SIM7020C communication chip, the SIM7020C communication chip is connected with an MSP430F169 singlechip of the second control module 7 through serial communication signals, and the MSP430F169 singlechip can realize control and data processing of the SIM7600CE communication chip; the external NB-IoT antenna of the SIM7020C communication chip is wirelessly connected to the cloud server. The second communication module 8 can send the control command of the second control module 7 to the positioning terminal 1 through the NB-IoT cloud server 3, and can also receive the position coordinate data sent by the positioning terminal 1, and send the position coordinate data to the MSP430F169 single chip microcomputer of the second control module 7 for processing in a serial port communication manner.
In this embodiment, the LCD12864 LCD module is used to display the position of the train, and the data displayed by the LCD12864 LCD module is the output information of the second control module 7. Compared with other liquid crystal display modules, the LCD12864 liquid crystal display module has a much simpler hardware circuit structure or display program, and the price of the module is slightly lower than that of a graphic liquid crystal module with the same dot matrix.
In this embodiment, the second control module 7 is further in signal connection with a key module 11, the key module 11 includes a power key, a reset key, a start key and a pause key, and the power key is used for connecting whether the power voltages of the second control module 7, the second communication module 8 and the liquid crystal display module 9 in the control center device 2 are connected; the reset key is used for resetting the second control module 7, the second communication module 8 and the liquid crystal display module 9 and clearing the RAM data of the second control module 7, the second communication module 8 and the liquid crystal display module 9; the start button is used for controlling and adjusting the frequency of the positioning terminal 1 for sending updated coordinate data to the control center equipment 2 through the NB-IoT cloud server 3, displaying the acquired position information on the liquid crystal display module 9 at the first time for a dispatcher to check in real time, identifying and confirming the position information through the second control module 7 after the start button is pressed, sending a corresponding preset control signal to the positioning terminal 1 through the NB-IoT cloud server 3 through the second communication module 8, and enabling the first control module 4 to modify the frequency of the positioning signal automatically acquired by the first communication module 5 and the frequency of the position coordinate sent to the NB-IoT cloud server 3 after the positioning terminal 1 receives the control signal, so that the updating speed of the position coordinate is improved; the pause key is used for pausing the second control module 7, the second communication module 8 and the liquid crystal display module 9 and temporarily storing data of the second control module 7, the second communication module 8 and the liquid crystal display module 9 in the RAM.
In this embodiment, the first power module 6 and the second power module 10 both use LM2596 buck chips, and the terminal device can use environment-friendly 9V alkaline battery for dc power supply, and the voltage is converted into 5V voltage required by the MSP430F169 control module and the SIM7600CE communication module through the buck module LM 2596. Because the independent battery is adopted as the power supply, the positioning system can still be normally used when the power supply system of the subway breaks down suddenly. First power module 6 and second power module 10 all have the characteristic of low-power consumption, can also improve operating efficiency, have TTL outage function simultaneously and overheated, current-limiting protection function accords with the requirement of step-down module, have guaranteed output voltage's stability well.
In this implementation, the NB-IoT cloud server 3 uses an existing cloud server as a storage space, and completes information transmission between the SIM7600CE communication module of the positioning terminal and the SIM7020C communication module of the control center device in an NB-IoT wireless manner, thereby implementing bidirectional communication between the positioning terminal 1 and the control center device 2.
The subway train positioning system based on the NB-IoT realizes real-time monitoring of the train running condition by utilizing the NB-IoT technology, accurately monitors the geographical position of the train when the train runs at a high speed, displays the geographical position on the liquid crystal display module in real time, and a driving dispatcher can accurately and quickly know the train running condition, thereby providing a redundant safety monitoring means for the safe running of the subway train. The subway train protection device has excellent low power consumption and reliability, provides reliable guarantee for the operation of subway trains, and reduces the occurrence probability of subway train accidents.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.
Claims (8)
1. The subway train positioning system based on NB-IoT is characterized in that a plurality of mobile network base stations are arranged around a train running track, and the system comprises: the subway train positioning system comprises a positioning terminal (1), control center equipment (2) and an NB-IoT cloud server (3), wherein the positioning terminal (1) is arranged in a train, and the positioning terminal (1) is in signal connection with the control center equipment (2) through the NB-IoT cloud server (3);
the positioning terminal (1) comprises a first control module (4), a first communication module (5) and a first power module (6);
the control center equipment (2) comprises a second control module (7), a second communication module (8), a second power supply module (10) and a liquid crystal display module (9);
the first communication module (5) is used for being in signal connection with at least 3 mobile network base stations, the first communication module (5) is used for receiving mobile network base station signal data received by the first communication module (5) and processing the signal data to obtain position coordinates of the positioning terminal (1), the first communication module (5) is further used for wirelessly sending the position coordinate data to the NB-IoT cloud server (3), and the first power supply module (6) is used for providing working voltage for the first control module (4) and the first communication module (5);
the train position display system is characterized in that the NB-IoT cloud server (3) is used for wirelessly sending received coordinate data to the second communication module (8), the second communication module (8) is used for sending the received coordinate data to the second control module (7), the second control module (7) is used for receiving and processing the coordinate data and sending the coordinate data to the liquid crystal display module (9), the liquid crystal display module (9) is used for displaying the train position, and the second power supply module (10) is used for providing working voltage for the second control module (7), the second communication module (8) and the liquid crystal display module (9).
2. The NB-IoT based subway train positioning system as claimed in claim 1, wherein: the second control module (7) is further in signal connection with the key module (11), and the key module (11) is used for controlling the second control module (7) to send a preset control signal to the first communication module (5) through the second communication module (8) and the NB-IoT cloud server (3), so that the first control module (4) modifies the frequency of the first communication module (5) for automatically acquiring the positioning signal and the frequency of the position coordinate sent to the NB-IoT cloud server (3).
3. The NB-IoT based subway train positioning system as claimed in claim 2, wherein: the mobile network base station is a 4G mobile network base station.
4. An NB-IoT based subway train positioning system as defined in claim 3, wherein: the first power supply module (6) and the second power supply module (10) both adopt LM2596 voltage reduction chips for reducing the input 9V voltage to 5V voltage for output.
5. An NB-IoT based subway train positioning system as defined in claim 3, wherein: the first control module (4) and the second control module (7) both adopt MSP430F169 single-chip microcomputers.
6. The NB-IoT based subway train positioning system as claimed in claim 5, wherein: the first communication module (5) adopts an SIM7600CE communication chip, the SIM7600CE communication chip is connected with the MSP430F169 singlechip of the first control module (4) through serial port communication signals, and the SIM7600CE communication chip is connected with the NB-IoT cloud server (3) through NB-IoT wireless communication and wireless signals.
7. The NB-IoT based subway train positioning system as claimed in claim 5, wherein: the second communication module (8) adopts a SIM7020C communication chip, the SIM7020C communication chip is connected with an MSP430F169 singlechip of the second communication module (8) through serial port communication signals, and the SIM7020C communication chip is connected with an NB-IoT cloud server (3) through NB-IoT wireless communication and wireless signals.
8. The NB-IoT based subway train positioning system as claimed in claim 7, wherein: the liquid crystal display module (9) adopts an LCD12864 liquid crystal display module, and the LCD12864 liquid crystal display module is in signal connection with an MSP430F169 singlechip of the second communication module (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020767126.2U CN212074042U (en) | 2020-05-11 | 2020-05-11 | Subway train positioning system based on NB-IoT |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020767126.2U CN212074042U (en) | 2020-05-11 | 2020-05-11 | Subway train positioning system based on NB-IoT |
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| CN212074042U true CN212074042U (en) | 2020-12-04 |
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| CN202020767126.2U Expired - Fee Related CN212074042U (en) | 2020-05-11 | 2020-05-11 | Subway train positioning system based on NB-IoT |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715874A (en) * | 2021-09-30 | 2021-11-30 | 刘晶晶 | Subway train electronic positioning system based on wireless |
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2020
- 2020-05-11 CN CN202020767126.2U patent/CN212074042U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715874A (en) * | 2021-09-30 | 2021-11-30 | 刘晶晶 | Subway train electronic positioning system based on wireless |
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