CN106953912A - The wave communication of public bus network half and the information display system that arrives at a station - Google Patents
The wave communication of public bus network half and the information display system that arrives at a station Download PDFInfo
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- CN106953912A CN106953912A CN201710162584.6A CN201710162584A CN106953912A CN 106953912 A CN106953912 A CN 106953912A CN 201710162584 A CN201710162584 A CN 201710162584A CN 106953912 A CN106953912 A CN 106953912A
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- bus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5441—Wireless systems or telephone
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
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- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
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Abstract
Each bus station constitutes bus arrival information query system, infrared receiving/transmission injection device transmission information is used between bus station and bus, public bus network realizes that information is exchanged between each bus station using the wave communication of power circuit half, WiFi communication is used when distance is longer between two bus stations, the network port that passenger can log in computer using mobile phone A PP obtains each road bus arrival information.
Description
(1) technical field：
Each bus station constitutes bus arrival information query system, and infrared receiving/transmission is used between bus station and bus
Injection device transmission information, public bus network realizes that information is exchanged between each bus station using the wave communication of power circuit half, when two public transport
Using Wi-Fi communications when distance is longer between standing, the network port that passenger can log in computer using mobile phone A PP obtains each road public affairs
Car is handed over to arrive at a station information.
(2) background technology：
With flourishing for public transport cause, increasing people starts the trip that takes bus, urban public bus lines with
The development for public transport cause rapidly increases, therefore road is also more and more crowded, and the time of passenger's waiting by bus becomes very uncertain,
The crowded passenger on public transport having of bus caused but seldom, because crowded bus number many times of getting on or off the bus are long,
Each station is required for stopping the longer time, if passenger can know that each circuit bus arrival information, avoiding congestion circuit can
To alleviate public bus network jam situation to a certain extent, ridden while being also convenient for passenger.
The existing intelligent bus stop board system based on GPS global locations, the extension GPS functions of being provided by the system are right
Public transit vehicle carries out real-time satellite positioning, although can grasp the letter such as the current position of public transit vehicle, travel speed, direction in real time
Breath, but the system architecture complex and expensive very flexible based on GPS global locations, and many high buildings and large mansions in city, some areas
Satellite-signal is not smooth, therefore influence popularization, and only super-large city just has on probation at present.
(3) content of the invention：
The master controller of bus station is set in public transport terminus, public transport station control, master controller are set in each bus station
Pass through power line half-wave constructing communication network with each public transport station control.Each bus, which is provided with Vehicle Controller, to be used for and bus station
Controller carries out wireless communication information exchange, and the simple cheap signal stabilization of system architecture is good.
The cycle discriminator circuit structural representation of master controller and each public transport station control is as shown in Fig. 2 by two uses
The voltage comparator composition of hysteresis loop comparator, two comparators are separately positioned on the positive half cycle descending branch of cycle, crest voltage
60% to 80% place is as the place of point 1 and 30% to 45% is screened as point 2 is screened, and the positive half cycle descending branch of cycle is close to communication disruption
At INT1 breakpoint, screen point and be arranged near communication disruption INT1 breakpoint, filtered off most of interference, and make communication in week
The position that ripple bears half-wave is more accurate.Include filter circuit in each voltage comparator, the reference voltage of its voltage comparator by
Mu balanced circuit is provided, and comparator input terminal is followed by from electric power netting twine through signal condition, resistance step-down, partial pressure, voltage stabilizing.
As shown in figure 1, at cycle zero passage, that is, screening point 0 and setting voltage zero-cross detection module, it uses cycle positive half-wave
Signal sends into the clock end CLK of d type flip flop, D triggerings after further isolating negative half period, signal condition through electric resistance partial pressure, diode
Q termination single-chip microcomputers the external interrupt mouthful INT0, the external interrupt mouthful INT0 of device are arranged to level triggers, the D terminations of d type flip flop
Ground, S termination single-chip processor i/os mouthful, usually puts 1 for the I/O mouthfuls.When cycle positive half-wave signal arrives, on CLK signal immediately after
Rising edge makes d type flip flop Q ends be 0, single-chip microcomputer external interrupt mouthful INT0 low levels, so as to produce interruption, the break period is T0, from T0
Place starts timing, is delayed through 5MS, and the output voltage of electricity pressure comparator ﹙ V1 ﹚ at point T1 is screened in single-chip microcomputer scanning, when all wave voltages
During Da Dao ﹙ V1 ﹚ threshold voltage, output voltage produces saltus step, and scanning records timing time t1 during its saltus step；Same scanning note
The electric time t2 for pressing comparator ﹙ V2 ﹚ output voltage saltus steps in point T2 place is screened in record, by t1, t2 saltus step corresponding with t1, t2 respectively
Time setting value Ts1, Ts2 is made comparisons；If in the range of allowable error, the cycle signal detected be it is true, otherwise for
It is false.For the fictitious time Central Shanxi Plain break INT1, perform interrupt return, when for it is true when d type flip flop set to 0, execute instruction：Open interrupt INT 1, it is described
I/O mouthfuls set to 0, the Central Shanxi Plain break INT0, described I/O mouthfuls put 1.
Lock in time uses the product multiplied to the stored count value N of grid cyclic wave and the average time T-phase of one cycle of power network,
Along with the clocking value Ts between timing time point ti and grid cyclic wave integer value obtains lock in time TZ, its grid cyclic wave it is flat
The equal time is to take it to be averagely worth to the measured value of 100 grid cyclic wave times in grid cyclic wave counting process.
System is the lock in time communication in agreement.It is each in the telecommunication circuit of each station control and main controller to install one
Communications electronics switch, switch drive module.The switch drive module of communications electronics switch is to be depressured, believe through resistance from electric power netting twine
Number conditioning and the anti-phase CLK ends for being followed by d type flip flop A, the external interrupt mouthful INT1 of d type flip flop A Q termination single-chip microcomputers, the interruption
Mouth is set to level triggers.D type flip flop A D ends ground connection, its S end connects with the I/O mouths of single-chip microcomputer, and original state S puts 1 in end.When
When the positive square-wave signal at CLK ends arrives, its rising edge makes d type flip flop set to 0 middle fracture INT1 low levels generation interruption, is interrupting clothes
First it is followed by believing electronic switch all through 0.5MS delays in business program, starts timing, and set to 0 S ends, d type flip flop puts 1 i.e. Q ends and is
1 and the Central Shanxi Plain break INT1, then communicated, communications electronics switch be connected to single-chip microcomputer corresponding port according to used communication mode, and
The sign off of this cycle within signal condition, timing 9MS is carried out, shut-off communications electronics are switched, and S, which puts at end 1, makes out interruption etc.
The communication of next cycle is treated, so goes round and begins again and realizes half wave communication.Main controller is sent out to each station control during this sign off
Send shut-off communications electronics switch, the disconnected INT1 in Central Shanxi Plain instruction.
The signal source of bus distance travelled is the kilometer sensor on speed changer or hub for vehicle wheel, to mileage
Table sensor output pulse signal, which is counted, can reflect wheel revolutions, obtain speed and distance travelled information, mileometer sensing
Device output signal through level shifting circuit, low-pass filter circuit it is anti-interference after output signal is accurately caught by microcontroller ports
Identification is caught, microcontroller ports are re-fed into.Mileage between the preset each station of the Vehicle Controller of each circuit bus, to obtain
Position in traveling.When bus communicates with bus station, the mileage between two stations when the Vehicle Controller calculating setting of bus is arrived at a station
When subtracting the error amount of mileage between two stations when actual measurement is arrived at a station between+8 meters and -5 meters, the public affairs do not stopped before expression
Car is handed over, the bus is to be stopped to station location, then the error amount is marked M, and the Vehicle Controller of bus will indicate each of M
The secondary mileage error amount that arrives at a station, takes and leaves out maximum for several times by setting ratio number of times more than 5 times and arrive at a station mileage error amount, remaining is averaged
Value is as offset, for correcting measurement mileage.The time interval of the setting need to ensure and meanwhile the bus arrived at a station all from
Open, next bus is stopped to station location.
Infrared communication is used between bus and bus station, bus station installs several infrared in the possible stop position of bus
Emitter and infrared receiving device, each infrared-emitting diode realize the public transport to resting in diverse location using polling mode
Car sends detection signal.Infrared launcher and infrared receiving device and microcontroller are housed in the Vehicle Controller of bus.
Microcontroller here selects 89C4051 chips for convenience of description, and public transport car kilometer output signal is connected to 89C4051 I/O
Mouthful, it is stored in after being directly read by 89C4051 in nonvolatile storage, 89C4051 calculates traveling distance in bus traveling, arrives
The encoded signal of arriving at a station comprising public bus network information is sent up to infrared transmitter during bus station, decodes and reads for infrared receiving circuit
Arrive at a station signal., will be infrared when the infrared receiver device that each public transport station control is installed receives the infrared signal of RF transmitter
Optical signal becomes electric signal and is sent to pre-amplification circuit to be amplified, then after demodulated device, will be to by signal detection circuit
Signal of standing is detected.
Each bus station constitutes bus arrival information query system, and each public transport station control is according to the station bus
Line Address cycles through detection signal, and information is realized with bus station after the Vehicle Controller response for the bus for reaching bus station
Exchange, when arriving at a station to channel transmission answer signal with many buses of circuit simultaneously, bus station will continuously receive several mistakes
Packet or the intensity listened to after channel signals superposition transfinite, and illustrate that present channel is interfered, and at this moment, each bus presses it
Apart from S between parking spot and site location, by bus travel direction, since being exceeded 6 meters of site location forward, automatically according to
Every 6 meters of range incrementation numberings backward to 18-50 meters of point leaving from station, fall into described Serial Number Range to number by S values, it is above-mentioned to set
Note generally there was only 2 to 3 cars while arriving at a station when putting.Public transport station control is suitable according to the numbering to the bus disturbing line that arrives at a station
Sequence retransmits detection signal, to the bus communicated not successfully if producing interference again, reduces the value weight every 6 meters of scopes
Do not repeat newly to number, repeat said process to interference is not produced, it fails when numbering to the next stop.When circuit possesses bus number
The preset numbering that will not be failed using fixation when measuring less.
Public transport station control, which will arrive at a station, send display to show after information processing, be easy to passenger to check.When Liang Ge bus stations it
Between distance be more than 700 meters, controller is respectively provided with serial ports Wi-Fi module between the Liang Ge bus stations, passes through router AP wireless access
Internet, information is exchanged between bus station is completed under the control of server monitoring software.In bus travel direction, it is located at
Rear bus station timing by public transport arrive at a station information through Internet pass to front bus station.
Because Wi-Fi module is the standard configuration of notebook, panel computer and smart mobile phone, therefore based on Wi-Fi technology
Intelligent artifact obtained promotion and application, Wi-Fi intelligent nodes can be directly connected to wireless router, so as to access
Internet, node can also arbitrarily expand.Setting serial ports Wi-Fi module between bus station in controller is used to access
Internet.Serial ports Wi-Fi module from Microchip RN171 by UART interface the controller directly between bus station
In microprocessor be connected, or select other Wi-Fi modules.Integrated complete ICP/IP protocol on RN171 module pieces, without outer
Portion drives, and RN171 modules can enter Low-power-consumptiodormancy dormancy and energy automatically scanning and connection AP, therefore be that a high integration surpasses
Low-power consumption Wi-Fi module, it is adaptable to battery powered equipment.Module works in 2.4G frequency ranges, and acp chip is integrated with 32
Device is managed, transmission power can be adjusted by software, and support external antenna.RN171 modules connect with single-chip microcomputer in public transport station control
As long as when connecing by the power supply of RN171 modules, and TX and RX pin be connected with single-chip microcomputer, wherein TX and RX connect for intersection.
The information of arriving at a station so sent by nRF905 radio-frequency modules, passes through the serial ports Wi-Fi moulds in controller between bus station
The block information that will arrive at a station is sent to wireless router AP through Internet to server.The master controller of public bus network terminus leads to
Coupled computer is crossed to be connected with Internet.
(4) illustrate：
Fig. 1 is cycle discriminator circuit principle schematic；
Fig. 2 is the circuit structure block diagram of the wave communication of public bus network half and the information display system that arrives at a station.
(5) embodiment：
The circuit structure block diagram of the wave communication of public bus network half and the information display system that arrives at a station is as shown in Figure 2, comprising:
Controller (3), public transport station control (4) between master controller (1), the Vehicle Controller (2) of bus, bus station；
Wherein Vehicle Controller (2) is by infrared transmitter, infrared remote receiver, microcontroller, nonvolatile storage and kilometer sensor
Constitute, microcontroller selects AT24C32 from 89C4051 nonvolatile storages, and kilometer sensor output signal meets 89C4051
I/O mouths；
Controller (3) and public transport station control (4) are by infrared transmitter, infrared receiver between master controller (1), bus station
Device, single-chip microcomputer, nonvolatile storage, cycle discriminator circuit, communications electronics switch, switch drive module and LCD display are constituted,
Wherein master controller (1) is connected to Internet by coupled computer.Single-chip microcomputer is from its single-chip microcomputer of 89C55
89C55 is additionally operable to control communications electronics switch, switch drive module and cycle discriminator circuit, and nonvolatile storage is selected
AT24C64, wherein LCD display are connected with 89C55 I/O mouths, and the information of arriving at a station of bus is stored in nonvolatile storage
In AT24C64.
Cycle discriminator circuit is made up of input circuit, voltage zero-cross detection module and voltage comparator.Input circuit is used for
By partial pressure of the mains AC voltage by resistance and diode, voltage comparator suitably stable input voltage is converted to.
Voltage zero-cross detection module d type flip flop, voltage comparator selects LM393, and its reference voltage is using the stable electricity of mu balanced circuit
Press the threshold voltage of comparator.Communications electronics switch uses reverse-blocking tetrode thyristor, and switch drive module is triggered comprising input circuit and D
Device.
Controller (3) adds serial ports Wi-Fi module between bus station, and wherein serial ports Wi-Fi module selects RN171 modules,
It is connected by single-chip microcomputer of the UART interface directly between bus station in controller, i.e. RN171 modules TX pin are connected to single-chip microcomputer
RX pin, RN171 module RX pin are connected to the TX pin of single-chip microcomputer.The serial ports Wi-Fi module information that will arrive at a station is sent to wireless router AP
Through Internet (5) to server, public transport interior communication is carried out.
Claims (2)
1. the wave communication of public bus network half and the information display system that arrives at a station, it is characterized in that public transport terminus sets master controller, each public affairs
Hand over station that public transport station control is set, master controller passes through the wave communication of power line half, each bus peace with each public transport station control
Entrucking set controller is used to carry out radio communication with public transport station control；
The cycle discriminator circuit of master controller and each public transport station control is made up of two voltage comparators, two comparator difference
The positive half cycle descending branch of cycle is arranged on, 60% to 80% place of crest voltage is used as Zhen as the place of point 1 and 30% to 45% is screened
Other point 2, the positive half cycle descending branch of cycle is screened point and is arranged near the breakpoint of communication disruption, filter close at the breakpoint of communication disruption
Most of interference has been gone, has made communication more accurate in the position that cycle bears half-wave；
At cycle zero passage, that is, screen point 0 and voltage zero-cross detection module is set, the defeated of point voltage comparator is screened in single-chip microcomputer scanning
Go out voltage, if timing time when recording its saltus step is in the range of allowable error, the cycle signal detected is true；
Lock in time uses the product multiplied to the stored count value N of grid cyclic wave and the average time T-phase of one cycle of power network, then adds
Clocking value Ts between upper timing time point ti and grid cyclic wave integer value obtains lock in time TZ, the mean time of its grid cyclic wave
Between be to take it to be averagely worth to the measured value of 100 grid cyclic wave times in grid cyclic wave counting process；
System is communicated in the lock in time of agreement, and a communications electronics are respectively installed in the telecommunication circuit of each station control and main controller
Switch, switch drive module, the negative half-wave anti-phase rear square-wave signal of grid cyclic wave are followed by believing electricity all when arriving through 0.5MS delays
After sub switch, connection within timing 9MS this cycle sign off, shut-off communications electronics switch waits the logical of next cycle
Letter, so goes round and begins again and realizes half wave communication, and main controller sends shut-off communications electronics switch to each station control during sign off
Instruction；
The signal source of bus distance travelled is the kilometer sensor on speed changer or hub for vehicle wheel, mileometer sensing
Device output signal through level shifting circuit, low-pass filter circuit it is anti-interference after send into microcontroller ports, the vehicle-mounted control of bus
Mileage between the preset each station of device processed, with position in being travelled；It is vehicle-mounted when bus when bus communicates with bus station
When controller calculates mileage between two stations of setting and subtracts the error amount of mileage between the actual station of measurement two between+8 meters and -5 meters, expression
The bus do not stopped above, the bus is to be stopped to station location, then the error amount is marked M, bus it is vehicle-mounted
Each time that the indicates M mileage error amount that arrives at a station is taken and leaves out maximum for several times by setting ratio number of times more than 5 times and arrive at a station mileage by controller
Error amount, remaining is averaged as offset, for correcting measurement mileage；The time interval of the setting need to ensure while arriving
The bus stood all leaves, and next bus is stopped to station location；
Infrared communication is used between bus and bus station, bus station may the several infrared emissions of stop position installation in bus
Device and infrared receiving device, each infrared-emitting diode are realized using polling mode and the bus for resting in diverse location are sent out
Send and infrared launcher and infrared receiving device and microcontroller are housed in detection signal, the Vehicle Controller of bus；Micro-control
Device processed selects 89C4051 chips, and public transport car kilometer output signal is connected to 89C4051 I/O mouths, is preserved after being read by 89C4051
In nonvolatile storage, 89C4051 calculates traveling distance in bus traveling, reaches bus station and is communicated with public transport station control
When infrared transmitter send the encoded signal of arriving at a station comprising public bus network information, for public transport station control infrared receiving circuit decode
Reading is arrived at a station signal；
Each bus station constitutes bus arrival information query system, circuit of each public transport station control according to the station bus
Address cycle sends detection signal, realizes that information is exchanged with bus station after the Vehicle Controller response of the bus for parking of arriving at a station,
When arriving at a station to channel transmission answer signal with many buses of circuit simultaneously, public transport station control will continuously receive several mistakes
Packet or the intensity listened to after channel signals superposition transfinite, and illustrate that present channel is interfered, and at this moment, each bus presses it
Apart from S between parking spot and site location, by bus travel direction, since being exceeded 6 meters of site location forward, automatically according to
Every 6 meters of range incrementation numberings backward to 18-60 meters of point leaving from station, fall into described Serial Number Range to number by S values, bus station
Controller retransmits detection signal to the bus disturbing line that arrives at a station according to the number order, to failed if producing interference again
The bus of communication, reduces the value every 6 meters of scopes and does not repeat to number again, repeats said process to not producing interference,
It fails when numbering to the next stop；
Public transport station control, which will arrive at a station, send display to show after information processing, be easy to passenger to check；When distance exceedes between two stations
Controller is respectively provided with serial ports Wi-Fi module between 700 meters of bus station, the Liang Ge bus stations, passes through router AP wireless access
Internet, information is exchanged between bus station is completed under the control of server monitoring software；In bus travel direction, it is located at
Rear bus station timing by public transport arrive at a station information through Internet pass to front bus station；Serial ports Wi-Fi module is selected
RN171 is connected by microprocessor of the UART interface directly between bus station in controller, RN171 modules and public transport station control
As long as during the connection of middle single-chip microcomputer by the power supply of RN171 modules, and TX and RX pin be connected with single-chip microcomputer, wherein TX and RX are
Intersection connects.
2. the wave communication of public bus network half according to claim 1 and the information display system that arrives at a station, it is characterised in that include:
Controller (3), public transport station control (4) between master controller (1), the Vehicle Controller (2) of bus, bus station；Wherein
Vehicle Controller (2) is made up of infrared transmitter, infrared remote receiver, microcontroller, nonvolatile storage and kilometer sensor,
Microcontroller selects AT24C32 from 89C4051 nonvolatile storages, and kilometer sensor output signal meets 89C4051 I/O
Mouthful；
Between master controller (1), bus station controller (3) and public transport station control (4) by infrared transmitter, infrared remote receiver,
Single-chip microcomputer, nonvolatile storage, cycle discriminator circuit, communications electronics switch, switch drive module and LCD display are constituted, its
Middle master controller (1) is connected to Internet by coupled computer；Single-chip microcomputer using 89C55, also use by its single-chip microcomputer
In control communications electronics switch, switch drive module and cycle discriminator circuit, nonvolatile storage selects AT24C64, wherein LCD
Display is connected with 89C55 I/O mouths；
Cycle discriminator circuit is made up of input circuit, voltage zero-cross detection module and voltage comparator；Input circuit is used for electricity
Power net alternating voltage is converted to voltage comparator suitably stable input voltage by the partial pressure of resistance and diode；Voltage
Zero passage detection module d type flip flop, voltage comparator uses LM393, and its reference voltage uses mu balanced circuit burning voltage ratio
Compared with the threshold voltage of device；Communications electronics switch uses reverse-blocking tetrode thyristor, and switch drive module includes input circuit and d type flip flop；
Controller (3) adds serial ports Wi-Fi module between bus station, and wherein serial ports Wi-Fi module selects RN171 modules, and it leads to
Cross single-chip microcomputer of the UART interface directly between bus station in controller to be connected, i.e., RN171 modules TX pin are connected to the RX pin of single-chip microcomputer,
RN171 module RX pin are connected to the TX pin of single-chip microcomputer；Serial ports Wi-Fi module will arrive at a station information be sent to wireless router AP warp
Internet (5) carries out public transport interior communication to server.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710162584.6A CN106953912A (en) | 2017-03-18 | 2017-03-18 | The wave communication of public bus network half and the information display system that arrives at a station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710162584.6A CN106953912A (en) | 2017-03-18 | 2017-03-18 | The wave communication of public bus network half and the information display system that arrives at a station |
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| CN106953912A true CN106953912A (en) | 2017-07-14 |
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| CN201710162584.6A Pending CN106953912A (en) | 2017-03-18 | 2017-03-18 | The wave communication of public bus network half and the information display system that arrives at a station |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1825379A (en) * | 2006-02-20 | 2006-08-30 | 天津大学 | Transit vehicle information system based on low power consumption short range auto-route wireless network |
| CN102737503A (en) * | 2012-06-20 | 2012-10-17 | 东南大学 | Communication connectivity analysis method for bus dynamic scheduling under internet of vehicles environment |
| KR20140129402A (en) * | 2013-04-23 | 2014-11-07 | 주식회사 이고 | Bus Information Terminal With Regeneration Capability |
| CN106094620A (en) * | 2016-06-20 | 2016-11-09 | 福州台江区超人电子有限公司 | Remote analog amount gathers warning system |
-
2017
- 2017-03-18 CN CN201710162584.6A patent/CN106953912A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1825379A (en) * | 2006-02-20 | 2006-08-30 | 天津大学 | Transit vehicle information system based on low power consumption short range auto-route wireless network |
| CN102737503A (en) * | 2012-06-20 | 2012-10-17 | 东南大学 | Communication connectivity analysis method for bus dynamic scheduling under internet of vehicles environment |
| KR20140129402A (en) * | 2013-04-23 | 2014-11-07 | 주식회사 이고 | Bus Information Terminal With Regeneration Capability |
| CN106094620A (en) * | 2016-06-20 | 2016-11-09 | 福州台江区超人电子有限公司 | Remote analog amount gathers warning system |
Non-Patent Citations (2)
| Title |
|---|
| 党三磊等: "《低压电网通信技术》", 31 July 2016, 中国电力出版社 * |
| 黄发乾: ""公交车辆自动定位与智能报站系统研究"", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
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