CN115913362A - System for carrying out ground data dump by using wireless optical communication - Google Patents
System for carrying out ground data dump by using wireless optical communication Download PDFInfo
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Abstract
The invention provides a system for dumping ground data by using wireless optical communication, which solves the problems that the operation flow of a train is seriously influenced due to overlong dumping duration because mass data exceeding 1TB is generated by vehicle-mounted equipment on a rail transit vehicle during the running period of the train; the invention utilizes the technical scheme of wireless optical communication to dump data, exchanges position information of a vehicle-mounted FSO terminal and position information of a ground FSO terminal through a wireless network, adjusts the pointing direction of the FSO terminal through a brushless direct current servo cradle head respectively, and assists the FSO terminal to finish automatic focusing; sending registration information to a server platform by adopting a high-speed buffer device for registration, reporting running state information, and dumping data to a ground data center within a limited time when a train stops at a station; the data dump rate is more than 10 times of the data dump rate of a common network, the efficiency of quickly landing a large amount of data through a wireless communication network is improved, and accidents are analyzed and prevented in time. The invention is suitable for rail transit.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a system for dumping ground data by using wireless optical communication.
Background
The existing data transmission modes in the rail transit field mainly include a cellular network 2G mode, a cellular network 4G mode, a WIFI mode and a 5G millimeter wave mode; the coverage radius of the cellular network 2G private network base station is 10Km, the coverage radius can be expanded to 36Km furthest, although the coverage range is wide, the theoretical highest rate is only 64kbps, and the method is suitable for transmission and interaction of small data volume and real-time data;
the coverage radius of the cellular network 4G private network base station is within 3Km, the coverage range is much smaller than that of a 2G private network, the theoretical highest rate is 100Mbps, and the cellular network 4G private network base station is suitable for small data volume and real-time data transmission and interaction.
In the WIFI mode, the coverage radius of the AP is within 200 meters, the theoretical highest transmission rate can reach 1000Mbps, and due to the fact that the coverage range is small and switching between the APs is not supported, a link is interrupted in the switching process, but the single-point deployment price is low.
In a 5G millimeter wave mode, the coverage radius of a private network RBS base station is within 300 meters, and the theoretical highest transmission rate is 1.7Gbps; the sight distance is spread, is easily subjected to shielding interference, and a contact net near a track is dense, the electromagnetic environment is complex, and the track is easily subjected to electromagnetic interference and reflection interference. The method can be used for dumping large data, and the dumping rate of the data in actual use is about 1 minute and 10 GBps. If the size of the data to be dumped is within 300GB, the data can be dumped within 30 minutes without influencing the operation flow of the train; if the data to be dumped exceeds 1TB, the dumping process needs to be continued for too long, and the train operation flow is seriously influenced.
Free Space optical communications FSO (Free Space Optics) is an optical communication system that transmits optical signals using the air instead of optical fibers, and is a combination of optical fiber communication and wireless communication. By adopting 1528-1565 nm infrared light wave laser technology, the transmission distance can reach 4Km, and the transmission speed can reach 10Gbps within 1 Km. The process of starting from the crew department, performing a transportation task, and then returning to the crew department is called "road crossing". For comprehensive inspection vehicles and vehicles with 3C detection operation, the data to be dumped in one traffic operation is 500GB to 600GB, even reaches more than 1TB, and the data dump time can be greatly shortened by using the FSO free space optical communication technology.
Disclosure of Invention
The invention provides a system for dumping ground data by using wireless optical communication, which solves the problems that in the field of rail transit, the running time of a vehicle is long, the stopping time is short, and a large amount of data is generated by vehicle-mounted equipment during the running of a train. The invention can provide 10Gpbs ultrahigh bandwidth and can well realize the purpose of quickly landing a large amount of data of a train within limited parking time.
The invention provides a system for dumping ground data by using wireless optical communication, which comprises vehicle equipment and ground equipment, wherein the vehicle equipment comprises a data source, a high-speed buffer device, a vehicle-mounted brushless direct current servo cradle head and a vehicle-mounted FSO terminal, and the high-speed buffer device is respectively connected with the vehicle-mounted brushless direct current servo cradle head, the vehicle-mounted FSO terminal and the data source through Ethernet;
the ground equipment comprises a data storage NAS, a server platform, a ground brushless direct current servo cradle head and a ground FSO terminal, wherein the server platform is respectively connected with the ground brushless direct current servo cradle head, the data storage NAS and the ground FSO terminal through an Ethernet; the server platform and the ground brushless direct current servo holder are connected through a CAN bus to form a closed-loop control system;
the cache device downloads data from a data source and stores the downloaded data in a hard disk of the cache device; the high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through a vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal, and sends the position information of the vehicle-mounted FSO terminal to the server platform through a wireless communication network;
after receiving the position information of the vehicle-mounted FSO terminal, the server platform adjusts the pointing direction of the ground FSO terminal through a ground brushless direct current servo cradle head; the ground brushless direct current servo cradle head receives offset angle information of a ground FSO terminal sent by a server platform through a CAN bus, and adjusts the pointing direction of the ground FSO terminal;
after the server platform acquires the position information of the ground brushless direct current servo holder through the CAN bus, the server platform sends an instruction to the ground brushless direct current servo holder to finely adjust the direction of the ground FSO terminal;
and the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, then the cache device sends registration information to the server platform for registration, and the cache device starts to transmit data to the server platform after the registration is passed.
Preferably, the cache device downloads data from a data source, and stores the downloaded data in a hard disk of the cache device; specifically, the downloaded data is stored in a hard disk of a cache device for buffering, the data source generates operation data by different types of onboard equipment installed on a train, and the data source includes: the system comprises 6A video data, 6A driving safety data, 3C data and comprehensive detection data;
the downloading mode comprises an ftp file transfer protocol client program, an sftp security file transfer protocol client program, an scp security remote file copy and an rsync remote synchronous downloading mode.
Preferably, the high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through a vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal, and sends the position information of the vehicle-mounted FSO terminal to the server platform through a wireless communication network, specifically, when the high-speed buffer device detects that the position of a vehicle parking station is within a preset distance threshold range from the ground FSO terminal before sending the position information of the vehicle-mounted FSO terminal to the server platform through the wireless communication network, the high-speed buffer device sends the position information of the vehicle-mounted FSO terminal to the server platform through the wireless communication network; meanwhile, the cache buffer device sends an instruction to start power supply to the vehicle-mounted FSO terminal;
the position information of the vehicle-mounted FSO terminal is acquired through a Beidou differential module configured by a cache device or is acquired in a wireless beacon mode;
the high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through a vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal, specifically, the high-speed buffer device calculates the offset angle of the vehicle-mounted FSO terminal according to the configured position information of the ground FSO terminal, and adjusts the pointing direction of the vehicle-mounted FSO terminal through the vehicle-mounted brushless direct current servo holder;
calculating the offset angle of the vehicle-mounted FSO terminal relative to the offset angle of the ground FSO terminal, and obtaining the offset angle of the vehicle-mounted FSO terminal by a method of calculating an azimuth angle, wherein the offset angle of the vehicle-mounted FSO terminal is as follows:
a = arctan(|dy/dx|)；
the coordinate increment dx = x '-x and the coordinate increment dy = y' -y is the subtraction of two coordinate components of the vehicle-mounted FSO terminal device coordinate a (x, y) and the ground FSO terminal device coordinate B _1 (x ', y').
Preferably, after receiving the position information of the vehicle-mounted FSO terminal, the server platform adjusts the pointing direction of the ground FSO terminal through a ground brushless direct current servo holder; specifically, a server platform calculates the offset angle of a ground FSO terminal after receiving position information of a vehicle-mounted FSO terminal, the server platform starts power supply for the ground FSO terminal through an instruction and sends the offset angle of the ground FSO terminal to a ground brushless direct current servo cradle head, and the ground brushless direct current servo cradle head adjusts the pointing direction of the ground FSO terminal according to the offset angle of the ground FSO terminal through a self-configured servo motor;
after receiving the position information of the vehicle-mounted FSO terminal, the server platform calculates the offset angle of the ground FSO terminal, and obtains the offset angle of the ground FSO terminal by adopting an azimuth angle calculation method, wherein the offset angle of the ground FSO terminal is the offset angle of the ground FSO terminal relative to the vehicle-mounted FSO terminal;
defining coordinates of the ground FSO terminal device as A (x, y) and coordinates of the vehicle-mounted FSO terminal device B _1 (x ', y'), calculating the difference of coordinate components of the two points, and obtaining coordinate increment dx = x '-x, dy = y' -y;
if the coordinate increment dx is not zero, the coordinate increment dy is not zero; then the quadrant angle a = arctan (| dy/dx |) is calculated in degrees;
azimuth = a when coordinate increment dx >0, coordinate increment dy > 0;
azimuth =180 ° -a when coordinate increment dx <0, coordinate increment dy > 0;
azimuth =180 ° + a when coordinate increment dx <0, and coordinate increment dy < 0;
azimuth =360 ° -a when coordinate increment dx >0, and coordinate increment dy < 0;
the method comprises the following steps that a ground brushless direct current servo cradle head receives offset angle information of a ground FSO terminal sent by a server platform through a CAN bus, and the pointing direction of the ground FSO terminal is adjusted, specifically, the ground brushless direct current servo cradle head adjusts the pointing direction of the ground FSO terminal according to the offset angle of the ground FSO terminal through a self-configured servo motor; and when the offset angle a of the ground FSO terminal is less than or equal to 1 degree, further fine adjustment is carried out.
Preferably, when the offset angle a of the ground FSO terminal is less than or equal to 1 degree, further fine tuning is performed, specifically, the server platform acquires the position information of the ground brushless direct current servo holder through the CAN bus, and sends an instruction to the ground brushless direct current servo holder through the CAN bus again to perform fine tuning on the pointing direction of the ground FSO terminal; the fine adjustment is that a server platform and a ground brushless direct current servo holder are connected through a CAN bus to form a closed-loop control system, position information is repeatedly acquired through the server platform and the ground brushless servo holder, an offset angle is repeatedly adjusted, when the offset angle a is smaller than 0.01 degrees finally, fine adjustment of the pointing direction of a ground FSO terminal relative to a vehicle FSO terminal is finished, and the vehicle FSO terminal and the ground FSO terminal complete tracking and focusing through respective laser axes; the position information finely adjusted by the ground brushless direct current servo holder comprises position precision and angle regulation precision.
Preferably, the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, the system further comprises a high-speed buffer device which sends an automatic tracking starting instruction to the vehicle-mounted FSO terminal through the Ethernet, meanwhile, the server platform sends the automatic tracking starting instruction to the ground FSO terminal through the Ethernet, and the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing processes by calculating a maximum light input point and adjusting the deviation angle of a laser axis of the vehicle-mounted FSO terminal and a laser axis of the ground FSO terminal;
the vehicle-mounted FSO terminal and the ground FSO ground terminal automatically complete tracking and focusing by calculating a maximum light input point and adjusting the offset angle of a laser axis of the vehicle-mounted FSO terminal and a laser axis of the ground FSO ground terminal, specifically, the vehicle-mounted FSO terminal receives a laser signal of the ground FSO terminal, meanwhile, the ground FSO terminal receives the laser signal of the vehicle-mounted FSO terminal, the vehicle-mounted FSO terminal equipment and the ground FSO terminal equipment calculate respectively to obtain received light power, the vehicle-mounted FSO terminal and the ground FSO terminal calculate respectively obtained maximum light input points of the vehicle-mounted FSO terminal and the ground FSO terminal according to the size of an error rate and the light power of an opposite end, and when the vehicle-mounted FSO terminal and the ground FSO terminal obtain the maximum light input points, the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing;
wherein, the maximum light input point is obtained when the error rate is less than 1E-12; bit error rate = number of errors in transmission/total number of codes transmitted 100%;
after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, the cache device starts to transmit data to the server platform after registering to the server platform.
Preferably, after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, the cache device starts to transmit data to the server platform after the cache device passes registration, in particular to reporting the running state information of the cache device to the server platform when the cache device applies for registration to the server platform after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing; after the registration is passed, the cache device starts an Iftp file client program or an ftp file transfer protocol client program to start transmitting data to the server platform; the running state information of the cache device comprises power-on time, power-off time and disk occupancy rate of the vehicle-mounted equipment.
Preferably, registering initiates transmission of data from the ftp file client program or the ftp file transfer protocol client program to the server platform via the post-cache, further comprising the cache initiating a breakpoint transmission if the n-1 th data is not transmitted, continuing the transmission until the data transmission to the server platform is complete, and the cache initiating the nth data transmission to the server platform.
Preferably, the cache device starts the nth data transmission to the server platform, which means that the server platform directly stores the data into the data storage NAS after receiving the data, and determines whether the data file is to be transmitted according to the data transmission progress information reported by the receiving cache device; the data transmission progress information comprises the size of the nth data transmission file, the number and the size of the remaining files to be transmitted;
after the data transmission is finished, the high-speed buffer device closes the power supply of the vehicle-mounted equipment through an instruction, and the vehicle-mounted FSO terminal is closed; the server platform closes the power supply of the ground equipment through an instruction, and the ground FSO terminal is closed; the lntp file client program, or the ftp file transfer protocol client program, is disconnected.
Preferably, the cache device comprises a data storage buffer module, a data processing module, a Beidou differential positioning module and an interface module;
the data storage buffer module is used for storing the data with the reading speed of the buffer data being more than 1500 MB/s;
the data processing module is used for carrying out calculation processing on the data by the edge computer based on the calculation capacity;
the Beidou differential positioning module is used for acquiring accurate position information of the vehicle-mounted FSO terminal;
and the interface module is used for at least one trillion network port and n giganetwork ports at the output port of the cache device, and dumping the acquired vehicle-mounted equipment operation data to the server platform through an lftp client program or an ftp file transfer protocol client program.
The embodiment of the invention provides a system for dumping ground data by using wireless optical communication, which solves the problems that the operation flow of a train is seriously influenced due to overlong dumping duration because mass data exceeding 1TB is generated by vehicle-mounted equipment on a rail transit vehicle during the running period of the train; the invention utilizes the technical scheme of wireless optical communication to dump data, exchanges position information of a vehicle-mounted FSO terminal and position information of a ground FSO terminal through a wireless network, adjusts the pointing direction of the FSO terminal through a brushless direct current servo cradle head respectively, and assists the FSO terminal to finish automatic focusing; sending registration information to a server platform by adopting a high-speed buffer device for registration, reporting running state information, and dumping data to a ground data center within a limited time when a train stops at a station; the data dump rate is more than 10 times of the data dump rate of a common network, the efficiency of quickly landing a large amount of data through a wireless communication network is improved, and accidents are analyzed and prevented in time.
Drawings
FIG. 1 is a block diagram of a system architecture for performing ground data dump using wireless optical communication;
FIG. 2 is a flow chart of a system for performing ground data dump using wireless optical communication;
FIG. 3 is a schematic position diagram of a system for vehicle-ground data dump using wireless optical communication based on the view angle of a ground FSO terminal device;
fig. 4 is a schematic position diagram of a system for performing ground data dump by using wireless optical communication based on the view angle of an on-board FSO terminal device.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
Example one
The system for dumping ground data by using wireless optical communication provided by the embodiment of the invention comprises vehicle equipment and ground equipment, wherein the vehicle equipment comprises a data source, a high-speed buffer device, a vehicle-mounted brushless direct current servo holder and a vehicle-mounted FSO terminal, and the high-speed buffer device is respectively connected with the vehicle-mounted brushless direct current servo holder, the vehicle-mounted FSO terminal and the data source through Ethernet; the server platform and the ground brushless direct current servo holder are connected through a CAN bus to form a closed-loop control system;
the ground equipment comprises a data storage NAS, a server platform, a ground brushless direct current servo holder and a ground FSO terminal, the ground equipment is sequentially connected through an Ethernet and used for bearing service data, and the server platform is respectively connected with the ground brushless direct current servo holder, the data storage NAS and the ground FSO terminal through the Ethernet;
the cache device downloads data from a data source and stores the downloaded data in a hard disk of the cache device; the high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through a vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal, and sends the position information of the vehicle-mounted FSO terminal to the server platform through a wireless communication network;
after receiving the position information of the vehicle-mounted FSO terminal, the server platform adjusts the pointing direction of the ground FSO terminal through a ground brushless direct current servo cradle head; the ground brushless direct current servo holder receives offset angle information of a ground FSO terminal sent by the server platform through a CAN bus, and adjusts the pointing direction of the ground FSO terminal;
after the server platform acquires the position information of the ground brushless direct current servo holder through the CAN bus, the server platform sends an instruction to the ground brushless direct current servo holder to finely adjust the direction of the ground FSO terminal;
the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, then the cache device sends registration information to the server platform for registration, and the cache device starts to transmit data to the server platform after the registration is passed.
In one embodiment, the cache device downloads data from a data source, and stores the downloaded data in a hard disk of the cache device; specifically, the downloaded data is stored in a hard disk of a cache device for buffering, the data source generates operation data by different types of onboard equipment installed on a train, and the data source includes: the system comprises 6A video data, 6A driving safety data, 3C data and comprehensive detection data;
the downloading mode comprises an ftp file transfer protocol client program, an sftp secure file transfer protocol client program, an scp secure remote file copy mode and an rsync remote synchronous downloading mode.
In one embodiment, the high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through a vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal and sends the position information of the vehicle-mounted FSO terminal to the server platform through a wireless communication network, and specifically, before the high-speed buffer device sends the position information of the vehicle-mounted FSO terminal to the server platform through the wireless communication network, when the high-speed buffer device detects that the position of a vehicle parking station is within a preset distance threshold range from the ground FSO terminal, the position information of the vehicle-mounted FSO terminal is sent to the server platform through the wireless communication network; meanwhile, the cache buffer device sends an instruction to start power supply to the vehicle-mounted FSO terminal;
the position information of the vehicle-mounted FSO terminal is acquired through a Beidou differential module configured by a cache device or is acquired in a wireless beacon mode;
the high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through a vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal, specifically, the high-speed buffer device calculates the offset angle of the vehicle-mounted FSO terminal according to the configured position information of the ground FSO terminal, and adjusts the pointing direction of the vehicle-mounted FSO terminal through the vehicle-mounted brushless direct current servo holder;
calculating the offset angle of the vehicle-mounted FSO terminal relative to the offset angle of the ground FSO terminal, and obtaining the offset angle of the vehicle-mounted FSO terminal by a method of calculating an azimuth angle, wherein the offset angle of the vehicle-mounted FSO terminal is as follows:
a = arctan(|dy/dx|)；
the coordinate increment dx = x '-x and the coordinate increment dy = y' -y is the subtraction of two coordinate components of the vehicle-mounted FSO terminal device coordinate a (x, y) and the ground FSO terminal device coordinate B _1 (x ', y').
In one embodiment, after receiving the position information of the vehicle-mounted FSO terminal, the server platform adjusts the pointing direction of the ground FSO terminal through a ground brushless direct current servo holder; specifically, a server platform calculates the offset angle of a ground FSO terminal after receiving position information of a vehicle-mounted FSO terminal, the server platform starts power supply for the ground FSO terminal through an instruction and sends the offset angle of the ground FSO terminal to a ground brushless direct current servo cradle head, and the ground brushless direct current servo cradle head adjusts the pointing direction of the ground FSO terminal according to the offset angle of the ground FSO terminal through a self-configured servo motor;
after receiving the position information of the vehicle-mounted FSO terminal, the server platform calculates the offset angle of the ground FSO terminal, and obtains the offset angle of the ground FSO terminal by adopting an azimuth angle calculation method, wherein the offset angle of the ground FSO terminal is the offset angle of the ground FSO terminal relative to the vehicle-mounted FSO terminal;
defining coordinates of the ground FSO terminal device as A (x, y) and coordinates of the vehicle-mounted FSO terminal device B _1 (x ', y'), calculating the difference of coordinate components of the two points, and obtaining coordinate increment dx = x '-x, dy = y' -y;
if the coordinate increment dx is not zero, the coordinate increment dy is not zero; then the quadrant angle a = arctan (| dy/dx |) is calculated in degrees;
when the coordinate increment dx >0 and the coordinate increment dy >0, the azimuth = a;
azimuth =180 ° -a when coordinate increment dx <0, coordinate increment dy > 0;
azimuth =180 ° + a when coordinate increment dx <0, and coordinate increment dy < 0;
azimuth =360 ° -a when coordinate increment dx >0, and coordinate increment dy < 0;
the method comprises the following steps that a ground brushless direct current servo cradle head receives offset angle information of a ground FSO terminal sent by a server platform through a CAN bus, and the pointing direction of the ground FSO terminal is adjusted, specifically, the ground brushless direct current servo cradle head adjusts the pointing direction of the ground FSO terminal according to the offset angle of the ground FSO terminal through a self-configured servo motor; and when the offset angle a of the ground FSO terminal is less than or equal to 1 degree, further fine adjustment is carried out.
In one embodiment, when the offset angle a of the ground FSO terminal is less than or equal to 1 degree, further fine tuning is performed, specifically, the server platform acquires the position information of the ground brushless direct current servo holder through the CAN bus, and sends an instruction to the ground brushless direct current servo holder through the CAN bus to perform fine tuning on the pointing direction of the ground FSO terminal; the fine adjustment is that a server platform and a ground brushless direct current servo holder are connected through a CAN bus to form a closed-loop control system, position information is repeatedly acquired through the server platform and the ground brushless servo holder, an offset angle is repeatedly adjusted, when the offset angle a is smaller than 0.01 degrees finally, fine adjustment of the pointing direction of a ground FSO terminal relative to a vehicle FSO terminal is finished, and the vehicle FSO terminal and the ground FSO terminal complete tracking and focusing through respective laser axes; the position information finely adjusted by the ground brushless direct current servo holder comprises position precision and angle regulation precision.
In one embodiment, the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, the high-speed buffer device sends an automatic tracking starting instruction to the vehicle-mounted FSO terminal through the Ethernet, meanwhile, the server platform sends an automatic tracking starting instruction to the ground FSO terminal through the Ethernet, and the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing processes by calculating a maximum light input point and adjusting offset angles of a laser axis of the vehicle-mounted FSO terminal and a laser axis of the ground FSO terminal;
the vehicle-mounted FSO terminal and the ground FSO ground terminal automatically complete tracking and focusing by calculating a maximum light input point and adjusting the offset angle of a laser axis of the vehicle-mounted FSO terminal and a laser axis of the ground FSO ground terminal, specifically, the vehicle-mounted FSO terminal receives a laser signal of the ground FSO terminal, meanwhile, the ground FSO terminal receives the laser signal of the vehicle-mounted FSO terminal, the vehicle-mounted FSO terminal equipment and the ground FSO terminal equipment calculate respectively to obtain received light power, the vehicle-mounted FSO terminal and the ground FSO terminal calculate respectively obtained maximum light input points of the vehicle-mounted FSO terminal and the ground FSO terminal according to the size of an error rate and the light power of an opposite end, and when the vehicle-mounted FSO terminal and the ground FSO terminal obtain the maximum light input points, the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing;
the maximum optical input point is obtained when the error rate is less than 1E-12; bit error rate = number of errors in transmission/total number of codes transmitted 100%;
after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, the cache device starts to transmit data to the server platform after the cache device is registered.
In one embodiment, after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, the cache device starts to transmit data to the server platform after the cache device passes registration, in particular to reporting the running state information of the cache device to the server platform when the cache device applies for registration to the server platform after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing; after the registration is passed, the cache device starts an ftp file client program or an ftp file transfer protocol client program to start transmitting data to the server platform; the running state information of the cache device comprises power-on time, power-off time and disk occupancy rate of the vehicle-mounted equipment.
In one embodiment, registering to initiate transmission of data to the server platform by the post-cache-initiation ftp file client program or the ftp file transfer protocol client program further comprises the cache initiating a breakpoint transmission if the n-1 th data is not completely transmitted, the cache initiating the nth data transmission to the server platform until the data transmission to the server platform is complete.
In one embodiment, the starting of the nth data transmission by the cache device to the server platform means that the server platform directly stores the data into the data storage NAS after receiving the data, and determines whether a data file is to be transmitted or not according to the data transmission progress information reported by the receiving cache device; the data transmission progress information comprises the size of the nth data transmission file, the number and the size of the remaining files to be transmitted;
after the data transmission is finished, the high-speed buffer device closes the power supply of the vehicle-mounted equipment through an instruction, and the vehicle-mounted FSO terminal is closed; the server platform closes the power supply of the ground equipment through an instruction, and the ground FSO terminal is closed; the lntp file client program, or the ftp file transfer protocol client program, is disconnected.
In one embodiment, the cache device comprises a data storage buffer module, a data processing module, a Beidou differential positioning module and an interface module;
the data storage buffer module is used for storing the data with the reading speed of the buffer data being more than 1500 MB/s;
the data processing module is used for carrying out calculation processing on the data by the edge computer based on the calculation capacity;
the Beidou differential positioning module is used for acquiring accurate position information of the vehicle-mounted FSO terminal;
and the interface module is used for at least one trillion network port and n giganetwork ports at the output port of the cache device, and dumping the acquired vehicle-mounted equipment operation data to the server platform through an lftp client program or an ftp file transfer protocol client program.
The embodiment of the invention provides a system for dumping ground data by using wireless optical communication, which solves the problems that the operation flow of a train is seriously influenced because the dumping process needs too long duration when the running time of a rail transit vehicle is long, the stopping time is short, a large amount of data is generated by vehicle-mounted equipment during the running period of the train, and the data to be dumped exceeds more than 1 TB; the technical scheme of the invention uses the technical scheme of wireless optical communication to dump data, exchanges position information of the vehicle-mounted FSO terminal and position information of the ground FSO terminal by combining a 4G network or a wireless beacon with a WIFI network, and assists the FSO terminal to automatically focus; sending registration information to a server platform by adopting a high-speed buffer device for registration, and reporting running state information of the high-speed buffer device to realize data transmission; the data dump rate is more than 10 times of the data dump rate of the WIFI scheme and the 5G millisecond wave scheme, so that the data can be dumped to a ground data center in time within limited stop time of the train, the train operation data can be analyzed in time, accidents are prevented, and the efficiency of rapid landing of a large amount of data is improved.
Example two
The system for dumping the ground data by using the wireless optical communication provided by the embodiment of the invention comprises two parts, namely vehicle-mounted equipment and ground equipment, and is a system block diagram, as shown in fig. 1:
vehicle onboard device configuration: the data source and the high-speed buffer device are connected by using a gigabit Ethernet, a vehicle-mounted FSO terminal and a brushless direct current servo pan-tilt (with a drive encoder);
the high-speed buffer device selects a solid state disk of an M.2 (NVME protocol) interface with the disk read speed of more than 1500MB/s, and is connected with the vehicle-mounted FSO terminal equipment through a gigabit network port, and a power supply system POE is used in the embodiment; eye safety rating: 1 meter.
The big dipper difference orientation module of high-speed buffer configuration, the data volume of waiting to transmit in the high-speed buffer is greater than predetermined threshold value, and the actual receptivity condition according to ground station of predetermineeing the threshold value corresponds the setting, can set up to: 20GBtyes, 50GBytes, 100GBytes, etc. When the data volume to be transmitted is larger than a preset threshold value, one-time transmission is carried out, otherwise, the performance is influenced instead by frequent transmission of a small amount of data, and the dump of other vehicle-mounted data is also influenced.
The high-speed buffer device comprises a data storage buffer module, a data processing module, a Beidou differential positioning module and an interface module;
the data storage buffer module is used for storing data with the reading speed of the buffer data being more than 1500 MB/s;
the data processing module is used for performing calculation processing on data by an edge computer based on calculation capacity;
the Beidou differential positioning module is used for acquiring accurate position information of the vehicle-mounted FSO terminal;
the interface module is used for at least one gigabit network port and n gigabit network ports of the output port of the cache device, and dumping the acquired vehicle-mounted equipment operation data to the server platform through an Iftp client program or an ftp file transfer protocol client program.
Ground equipment configuration: the system comprises a server platform, a data storage NAS (network attached storage), a brushless direct current servo holder (with a drive encoder), wherein the ground FSO terminal, the server platform, the brushless direct current servo holder and the data storage NAS are connected by using a gigabit Ethernet;
in this embodiment, the FSO terminal uses POE to supply power; eye safety rating: 1 m; the data is converged at the switch through the LC-LC multimode fiber and is connected to the server platform, the server platform uses NAS equipment of a RAID 5 disk array as data storage, and the write rate of the disk array is selected to be larger than 1500MB/s in the embodiment.
The FSO terminal equipment supports an SNMP (simple network management protocol) simple gateway management protocol and can effectively manage the running state of the equipment; the system specifically operates as a system flowchart shown in fig. 2.
1. Cache device collects data from data source
During the operation of the vehicle, the cache device collects data from a data source through an ftp file transfer protocol client (or an sftp secure file transfer protocol client, an scp secure remote file copying tool, an rsync remote synchronization tool and the like).
2. Hard disk for storing collected data in high-speed buffer device
The cache device downloads data from a data source and stores the downloaded data in a hard disk of the cache device for buffering.
3. The cache device transmits the position information of the vehicle-mounted FSO terminal to the server platform
In one embodiment, when the vehicle parking position is within a preset distance threshold range from a ground FSO terminal, the position information of the vehicle-mounted FSO terminal is sent to a server platform through a 4G network or a WIFI network; in an embodiment, when the parking position of the vehicle is within 200 meters of the preset value of the ground FSO terminal, the cache device sends the position information of the vehicle FSO terminal to the server platform through the 4G network or the WIFI network.
4. The POE is powered on by the cache buffer device, the vehicle-mounted FSO terminal is powered on, and the vehicle-mounted FSO terminal enters the running state
The high-speed buffer device enables POE (Power over Ethernet) to supply Power through an internal instruction (namely a POE Power supply switch is turned on), the vehicle-mounted FSO terminal is powered on, and enters a running state after self-checking (note: the vehicle-mounted FSO terminal uses a POE Power supply mode, the POE is Power over Ethernet, and Power is supplied through an Ethernet port in a popular way).
5. The high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through the vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal;
the server platform is connected to the ground brushless dc servo pan/tilt via a CAN bus, in the embodiment, for example: the ground brushless direct current servo cradle head is provided with a driving encoder, a position sensor is arranged in the ground brushless direct current servo cradle head, position closed-loop control can be performed, the position feedback precision is 13bit, and the angle adjusting precision is 0.01 degrees; the server platform sends an offset angle which is zero degrees relative to the north direction to the ground brushless direct current servo cradle head through the CAN bus, and the pointing direction of the ground FSO terminal is adjusted through the ground brushless direct current servo cradle head.
The method for calculating the relative azimuth angle and the azimuth angle by respectively calculating the coordinates of two Beidou systems (or GPS) of the ground FSO terminal equipment and the vehicle-mounted FSO terminal equipment comprises the following steps: as shown in fig. 4, for example, the GPS coordinates of the terrestrial FSO terminal are in one of the four quadrants; calculating the position of the vehicle-mounted FSO terminal relative to the ground FSO terminal based on the visual angle of the vehicle-mounted FSO terminal equipment;
firstly, calculating coordinate increment dx = x '-x, dy = y' -y, subtracting two coordinate components corresponding to the ground FSO terminal device coordinate A (x, y) and the vehicle FSO terminal device coordinate B _1 (x ', y'), namely subtracting the start point coordinate from the end point coordinate:
if one of dx and dy is zero, the azimuth angle is determined according to the positive and negative of the other one: one of 0 °,90 °,180 °,270 °;
if dx and dy are not zero; then the quadrant angle a = arctan (| dy/dx |) is calculated in units: degree;
obtaining the offset angle of the vehicle-mounted FSO terminal by a method of calculating an azimuth angle, wherein the offset angle of the vehicle-mounted FSO terminal is as follows:
azimuth = a when coordinate increment dx >0, coordinate increment dy > 0;
when coordinate increment dx <0, coordinate increment dy >0, azimuth =180 ° -a;
azimuth =180 ° + a when coordinate increment dx <0, and coordinate increment dy < 0;
when coordinate increment dx >0 and coordinate increment dy <0, azimuth =360 ° -a;
6. after receiving the position information of the vehicle-mounted FSO terminal, the server platform adjusts the pointing direction of the ground FSO terminal through a ground brushless direct current servo cradle head; as shown in fig. 3, based on the viewing angle of the ground FSO terminal device, the position of the ground FSO terminal relative to the vehicle FSO terminal is calculated; similarly, the azimuth angle (i.e. offset angle) adjusted by the ground FSO terminal is calculated according to the method for calculating the azimuth angle in step 4.
After the ground brushless direct current servo holder adjusts the pointing direction of the ground FSO terminal to a proper position according to the offset angle of the ground FSO terminal through a self-configured servo motor, the server platform acquires the information of a built-in position sensor of the ground brushless direct current servo holder through a CAN bus, and sends an instruction to finely adjust the pointing direction of the ground FSO terminal through the CAN bus again; the fine adjustment angle is smaller a less than or equal to 1 degree, and the fine adjustment angle is generally adjusted to be 0.01 degree.
7. Automatic focusing of vehicle-mounted FSO terminal and ground FSO terminal
The automatic focusing complete automatic focusing process of the vehicle-mounted FSO terminal and the ground FSO terminal is as follows:
the high-speed buffer device sends an automatic tracking starting instruction to the vehicle-mounted FSO terminal through the Ethernet, meanwhile, the server platform sends the automatic tracking starting instruction to the ground FSO terminal through the Ethernet, and the vehicle-mounted FSO terminal and the ground FSO ground terminal automatically complete the tracking and focusing processes by calculating the maximum light input point and properly adjusting the laser axis.
And the vehicle-mounted FSO terminal and the ground FSO terminal calculate the maximum optical input point according to the bit error rate (the bit error rate is less than 1E-12) and the received optical power of the opposite side. The larger the received optical power is, the smaller the error rate is, the error rate is less than 1E-12, and the maximum optical input point is obtained.
8. The cache device is connected to the server platform
After the tracking and focusing process is automatically completed, the cache device is connected to the server platform and is ready for data transmission.
9. Registering and reporting high speed buffer device operation state information
The cache device sends registration information to the server platform for registration, and reports the running state information of the cache device, including power-on and power-off time, disk occupancy rate and the like.
10. The cache device starts the client program process to start data transmission
The cache initiates an lftp file client program, or an ftp file transfer protocol client program, to initiate the data transfer. And if the data which is not transmitted last time is available, breakpoint continuous transmission is carried out until the transmission is completed, and new data transmission is started.
11. Reporting transmission progress information by high-speed buffer device
The reported transmission progress information comprises the size of the file currently being transmitted, the number and the size of the remaining files to be transmitted.
12. And after receiving the data, the server platform directly stores the data into the data storage NAS.
13. And the data transmission is completed to disconnect and close the vehicle equipment and the ground equipment.
The lntp file client program or the ftp file transfer protocol client program is disconnected.
At the moment, the vehicle-mounted high-speed buffer device closes POE power supply, the vehicle-mounted FSO terminal closes, the server platform closes POE power supply, and the ground FSO terminal closes.
The embodiment of the invention provides a system for dumping ground data by using wireless optical communication, which solves the problems that the operation time of a rail transit vehicle is long, the parking time is short, a large amount of data is generated by vehicle-mounted equipment during the operation of a train, and the dumping process lasts too long and the operation flow of the train is seriously influenced if the data to be dumped exceeds more than 1 TB; the technical scheme of the invention uses the technical scheme of wireless optical communication to dump data, exchanges position information of the vehicle-mounted FSO terminal and position information of the ground FSO terminal by combining a 4G network or a wireless beacon with a WIFI network, and assists the FSO terminal to automatically focus; sending registration information to a server platform by adopting a high-speed buffer device for registration, and reporting the running state information of the high-speed buffer device to realize data transmission; make data dump rate more than 10 times of WIFI scheme and 5G millisecond wave scheme data dump rate, realize the train in limited stop time, in time dump the ground data center with data to can in time analyze train operation data, the prevention produces the accident, has promoted the efficiency that falls to the ground fast of a large amount of data.
Claims (10)
1. A system for dumping ground data by using wireless optical communication is characterized by comprising vehicle equipment and ground equipment, wherein the vehicle equipment comprises a data source, a high-speed buffer device, a vehicle-mounted brushless direct current servo cradle head and a vehicle-mounted FSO terminal, and the high-speed buffer device is respectively connected with the vehicle-mounted brushless direct current servo cradle head, the vehicle-mounted FSO terminal and the data source through Ethernet;
the ground equipment comprises a data storage NAS, a server platform, a ground brushless direct current servo cradle head and a ground FSO terminal, wherein the server platform is respectively connected with the ground brushless direct current servo cradle head, the data storage NAS and the ground FSO terminal through Ethernet; the server platform and the ground brushless direct current servo holder are connected through a CAN bus to form a closed-loop control system;
the cache device downloads data from a data source and stores the downloaded data in a hard disk of the cache device; the high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through the vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal, and sends the position information of the vehicle-mounted FSO terminal to the server platform through a wireless communication network;
after the server platform receives the position information of the vehicle-mounted FSO terminal, the pointing direction of the ground FSO terminal is adjusted through a ground brushless direct current servo holder; the ground brushless direct current servo cradle head receives offset angle information of a ground FSO terminal sent by a server platform through a CAN bus, and adjusts the pointing direction of the ground FSO terminal;
after the server platform acquires the position information of the ground brushless direct current servo holder through the CAN bus, the server platform sends an instruction to the ground brushless direct current servo holder to finely adjust the direction of the ground FSO terminal;
the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, then the cache device sends registration information to the server platform for registration, and the cache device starts to transmit data to the server platform after the registration is passed.
2. The system of claim 1, wherein the cache device downloads data from a data source, stores the downloaded data in a hard disk of the cache device; specifically, the downloaded data is stored in a hard disk of a cache device for buffering, the data source generates operation data by different types of vehicle-mounted equipment installed on a train, and the data source includes: the system comprises 6A video data, 6A driving safety data, 3C data and comprehensive detection data;
the downloading mode comprises an ftp file transfer protocol client program, an sftp security file transfer protocol client program, an scp security remote file copy mode and an rsync remote synchronous downloading mode.
3. The system for vehicle ground data dump using wireless optical communication as claimed in claim 1, wherein the cache device adjusts the pointing direction of the vehicle-mounted FSO terminal through the vehicle-mounted brushless dc servo pan-tilt head according to the configured ground FSO terminal position information, and transmits the position information of the vehicle-mounted FSO terminal to the server platform through the wireless communication network; when the high-speed buffer device detects that the position of a vehicle parking station is within a preset distance threshold range from a ground FSO terminal, the position information of the vehicle-mounted FSO terminal is sent to a server platform through a wireless communication network, and meanwhile, the high-speed buffer device sends an instruction to start power supply to the vehicle-mounted FSO terminal;
the position information of the vehicle-mounted FSO terminal is acquired through a Beidou differential module configured by a cache device or is acquired through a wireless beacon mode;
the high-speed buffer device adjusts the pointing direction of the vehicle-mounted FSO terminal through the vehicle-mounted brushless direct current servo holder according to the configured position information of the ground FSO terminal; specifically, the high-speed buffer device calculates the offset angle of the vehicle-mounted FSO terminal according to the configured position information of the ground FSO terminal, and adjusts the pointing direction of the vehicle-mounted FSO terminal through a vehicle-mounted brushless direct current servo holder;
the offset angle of the vehicle-mounted FSO terminal relative to the ground FSO terminal is calculated, the offset angle of the vehicle-mounted FSO terminal is obtained by a method of calculating an azimuth angle, and the offset angle of the vehicle-mounted FSO terminal is as follows:
a = arctan(|dy/dx|)；
the coordinate increment dx = x '-x, and the coordinate increment dy = y' -y is the subtraction of two coordinate components of the vehicle-mounted FSO terminal device coordinate A (x, y) and the ground FSO terminal device coordinate B _1 (x ', y').
4. The system for vehicle-ground data dump by using wireless optical communication as claimed in claim 1, wherein the server platform adjusts the pointing direction of the ground FSO terminal through a ground brushless DC servo cradle head after receiving the position information of the vehicle-mounted FSO terminal; specifically, a server platform calculates the offset angle of the ground FSO terminal after receiving the position information of the vehicle-mounted FSO terminal, the server platform starts power supply for the ground FSO terminal through an instruction and sends the offset angle of the ground FSO terminal to a ground brushless direct current servo cradle head, and the ground brushless direct current servo cradle head adjusts the pointing direction of the ground FSO terminal according to the offset angle of the ground FSO terminal through a self-configured servo motor;
the server platform receives the position information of the vehicle-mounted FSO terminal and then calculates the offset angle of the ground FSO terminal, and the offset angle of the ground FSO terminal is obtained by adopting an azimuth angle calculation method and is the offset angle of the ground FSO terminal relative to the vehicle-mounted FSO terminal;
defining coordinates of the ground FSO terminal device as A (x, y) and coordinates of the vehicle FSO terminal device B _1 (x ', y'), calculating the difference of coordinate components of the two points, and obtaining coordinate increment dx = x '-x and dy = y' -y;
if the coordinate increment dx is not zero, the coordinate increment dy is not zero; then the quadrant angle a = arctan (| dy/dx |), and the unit is degree;
azimuth = a when coordinate increment dx >0, coordinate increment dy > 0;
azimuth =180 ° -a when coordinate increment dx <0, coordinate increment dy > 0;
azimuth =180 ° + a when coordinate increment dx <0, and coordinate increment dy < 0;
azimuth =360 ° -a when coordinate increment dx >0, and coordinate increment dy < 0;
the ground brushless direct current servo cradle head receives offset angle information of a ground FSO terminal sent by a server platform through a CAN bus, and adjusts the pointing direction of the ground FSO terminal; specifically, the ground brushless direct current servo holder adjusts the pointing direction of a ground FSO terminal according to the offset angle of the ground FSO terminal through a self-configured servo motor; and when the offset angle a of the ground FSO terminal is less than or equal to 1 degree, further fine adjustment is carried out.
5. The system for vehicle-ground data dumping by using wireless optical communication as claimed in claim 4, wherein when the offset angle a of the ground FSO terminal is less than or equal to 1 degree, the fine adjustment is further performed; specifically, the server platform acquires the position information of the ground brushless direct current servo holder through the CAN bus, and sends an instruction to the ground brushless direct current servo holder through the CAN bus to finely adjust the pointing direction of the ground FSO terminal; the fine adjustment is to form a closed-loop control system by connecting a server platform and a ground brushless direct current servo holder through a CAN bus, repeatedly acquire position information through the server platform and the ground brushless servo holder, repeatedly adjust an offset angle, and finally finish the fine adjustment of the pointing direction of the ground FSO terminal relative to the vehicle FSO terminal when the offset angle a is less than 0.01 DEG, and finish the tracking and focusing through respective laser axes of the vehicle FSO terminal and the ground FSO terminal; the position information finely adjusted by the ground brushless direct current servo holder comprises position precision and angle regulation precision.
6. The system for dumping ground data through wireless optical communication according to claim 5, wherein the vehicle-mounted FSO terminal and the ground FSO terminal complete tracking and focusing through their own laser axes, the system further comprises a cache device for sending an automatic tracking start instruction to the vehicle-mounted FSO terminal through the Ethernet, the server platform sends an automatic tracking start instruction to the ground FSO terminal through the Ethernet, and the vehicle-mounted FSO terminal and the ground FSO ground terminal complete tracking and focusing automatically by calculating a maximum light input point and adjusting an offset angle between the laser axis of the vehicle-mounted FSO terminal and the laser axis of the ground FSO terminal;
the vehicle-mounted FSO terminal and the ground FSO ground terminal automatically complete tracking and focusing by calculating a maximum light input point and adjusting the offset angle of a laser axis of the vehicle-mounted FSO terminal and a laser axis of the ground FSO ground terminal; the method comprises the steps that a vehicle-mounted FSO terminal receives a laser signal of a ground FSO terminal, meanwhile, the ground FSO terminal receives the laser signal of the vehicle-mounted FSO terminal, the vehicle-mounted FSO terminal and the ground FSO terminal calculate to obtain receiving optical power respectively, the vehicle-mounted FSO terminal and the ground FSO terminal calculate to obtain maximum optical input points respectively according to the error rate and the optical power of an opposite end, and when the vehicle-mounted FSO terminal and the ground FSO terminal obtain the maximum optical input points, the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing;
the maximum optical input point is obtained when the error rate is less than 1E-12; the bit error rate = 100% number of errors in transmission/total number of codes transmitted;
after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, the cache device starts to transmit data to the server platform after registering to the server platform.
7. The system for vehicle-ground data dumping by using wireless optical communication as claimed in claim 6, wherein after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, the cache device starts to transmit data to the server platform after registering with the server platform; after the vehicle-mounted FSO terminal and the ground FSO terminal automatically complete tracking and focusing, reporting the running state information of the cache device to the server platform when the cache device applies for registration to the server platform; after the registration is passed, the cache device starts an Iftp file client program or an ftp file transfer protocol client program to start to transfer data to the server platform; the running state information of the cache device comprises the power-on time, the power-off time and the disk occupancy rate of the vehicle-mounted equipment.
8. The system of claim 7, wherein the registering initiates an ftp client program or an ftp file transfer protocol client program to begin transferring data to the server platform via the post-cache, and further comprising the cache continuing the transfer at the breakpoint until the transfer of data to the server platform is complete and the cache initiating the transfer of the nth data to the server platform if the transfer of the (n-1) th data is not complete.
9. The system for dumping ground data by using wireless optical communication according to claim 8, wherein the cache device starts the nth data transmission to the server platform, that is, the server platform directly stores the nth data in the data storage NAS after receiving the nth data, and determines whether a data file is to be transmitted according to the data transmission progress information reported by the receiving cache device; the data transmission progress information comprises the size of the nth data transmission file, the number and the size of the remaining files to be transmitted;
after the data transmission is finished, the high-speed buffer device closes the power supply of the vehicle-mounted equipment through an instruction, and the vehicle-mounted FSO terminal is closed; the server platform closes the power supply of the ground equipment through an instruction, and the ground FSO terminal is closed; the lntp file client program or the ftp file transfer protocol client program is disconnected.
10. The system for vehicle-ground data dumping by using wireless optical communication as claimed in claim 9, wherein said cache device comprises a data storage buffer module, a data processing module, a beidou differential positioning module, and an interface module;
the data storage buffer module is used for storing data with the reading speed of the buffer data being more than 1500 MB/s;
the data processing module is used for carrying out calculation processing on data by an edge computer based on calculation capacity;
the Beidou differential positioning module is used for acquiring accurate position information of the vehicle-mounted FSO terminal;
the interface module is used for at least one gigabit network port and n gigabit network ports of the output port of the cache device, and dumping the acquired vehicle-mounted equipment operation data to the server platform through an Iftp client program or an ftp file transfer protocol client program.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090252499A1 (en) * | 2008-04-08 | 2009-10-08 | Vgvp Ltd. | Apparatus and Method for Sending and Receiving Free Space Optical Signals |
| CN101982948A (en) * | 2010-11-08 | 2011-03-02 | 北京邮电大学 | FSO (free space optic) dynamic networking method based on back scattering estimation |
| US20150188628A1 (en) * | 2013-12-27 | 2015-07-02 | Charles H. Chalfant, III | Acquisition, Tracking, and Pointing Apparatus for Free Space Optical Communications with Moving Focal Plane Array |
| CN108566245A (en) * | 2016-12-08 | 2018-09-21 | 中车株洲电力机车研究所有限公司 | A kind of free space optical communication method and device of train and ground base station |
| CN110072211A (en) * | 2018-01-22 | 2019-07-30 | 中车株洲电力机车研究所有限公司 | A kind of rail traffic communication means, apparatus and system |
| US20190288781A1 (en) * | 2018-03-13 | 2019-09-19 | Chang'an University | Lte-v based internet of vehicles communication test system and test method thereof |
| CN110661078A (en) * | 2019-08-25 | 2020-01-07 | 武汉华中天经通视科技有限公司 | Vehicle-ground high-speed laser communication device |
| US20200099446A1 (en) * | 2018-09-20 | 2020-03-26 | The Johns Hopkins University | Automatic repeat request network transport system for turbulent free-space optical communications links |
| CN111988351A (en) * | 2019-05-23 | 2020-11-24 | 河南蓝信科技有限责任公司 | Dynamic management system and method for engineering crew operation |
| CN112068608A (en) * | 2020-08-04 | 2020-12-11 | 深圳市海洋王照明工程有限公司 | Cloud deck control method, cloud deck, lighting equipment and storage medium |
| CN113196690A (en) * | 2018-12-06 | 2021-07-30 | 环球城市电影有限责任公司 | Carrier data transmission system |
| CN113904860A (en) * | 2021-10-20 | 2022-01-07 | 北京天宇威视科技股份有限公司 | Data transmission method, device, equipment, system and storage medium |
| CN113978522A (en) * | 2021-11-08 | 2022-01-28 | 王伟 | Vehicle transfer storage method based on 5G private network |
| CN115432036A (en) * | 2022-09-28 | 2022-12-06 | 北京和利时系统工程有限公司 | Train operation control system based on visible light communication and train positioning method |
-
2023
- 2023-02-15 CN CN202310116068.5A patent/CN115913362B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090252499A1 (en) * | 2008-04-08 | 2009-10-08 | Vgvp Ltd. | Apparatus and Method for Sending and Receiving Free Space Optical Signals |
| CN101982948A (en) * | 2010-11-08 | 2011-03-02 | 北京邮电大学 | FSO (free space optic) dynamic networking method based on back scattering estimation |
| US20150188628A1 (en) * | 2013-12-27 | 2015-07-02 | Charles H. Chalfant, III | Acquisition, Tracking, and Pointing Apparatus for Free Space Optical Communications with Moving Focal Plane Array |
| CN108566245A (en) * | 2016-12-08 | 2018-09-21 | 中车株洲电力机车研究所有限公司 | A kind of free space optical communication method and device of train and ground base station |
| CN110072211A (en) * | 2018-01-22 | 2019-07-30 | 中车株洲电力机车研究所有限公司 | A kind of rail traffic communication means, apparatus and system |
| US20190288781A1 (en) * | 2018-03-13 | 2019-09-19 | Chang'an University | Lte-v based internet of vehicles communication test system and test method thereof |
| US20200099446A1 (en) * | 2018-09-20 | 2020-03-26 | The Johns Hopkins University | Automatic repeat request network transport system for turbulent free-space optical communications links |
| CN113196690A (en) * | 2018-12-06 | 2021-07-30 | 环球城市电影有限责任公司 | Carrier data transmission system |
| CN111988351A (en) * | 2019-05-23 | 2020-11-24 | 河南蓝信科技有限责任公司 | Dynamic management system and method for engineering crew operation |
| CN110661078A (en) * | 2019-08-25 | 2020-01-07 | 武汉华中天经通视科技有限公司 | Vehicle-ground high-speed laser communication device |
| CN112068608A (en) * | 2020-08-04 | 2020-12-11 | 深圳市海洋王照明工程有限公司 | Cloud deck control method, cloud deck, lighting equipment and storage medium |
| CN113904860A (en) * | 2021-10-20 | 2022-01-07 | 北京天宇威视科技股份有限公司 | Data transmission method, device, equipment, system and storage medium |
| CN113978522A (en) * | 2021-11-08 | 2022-01-28 | 王伟 | Vehicle transfer storage method based on 5G private network |
| CN115432036A (en) * | 2022-09-28 | 2022-12-06 | 北京和利时系统工程有限公司 | Train operation control system based on visible light communication and train positioning method |
Non-Patent Citations (1)
| Title |
|---|
| 张轶;任海兰;王助娟;: "FSO的关键技术及应用", 光纤与电缆及其应用技术 * |
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