CN106935062A - The wave communication of public bus network half and the presentation of information board that arrives at a station - Google Patents
The wave communication of public bus network half and the presentation of information board that arrives at a station Download PDFInfo
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- CN106935062A CN106935062A CN201710162549.4A CN201710162549A CN106935062A CN 106935062 A CN106935062 A CN 106935062A CN 201710162549 A CN201710162549 A CN 201710162549A CN 106935062 A CN106935062 A CN 106935062A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
- G08G1/133—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams within the vehicle ; Indicators inside the vehicles or at stops
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
Abstract
A kind of public transport intelligence station board using half wave communication and WIFI, each of which bus station constitutes bus arrival information query system, serial ports WiFi module 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, communicated using WiFi modes when distance is more long between two bus stations, passenger can utilize the network port that mobile phone A PP logs in computer to obtain each road bus arrival information.
Description
(1) technical field：
Each bus station constitutes bus arrival information query system, and infrared emission is used between bus station and bus
Device, infrared remote receiver transmission information, public bus network realize that information is exchanged between each bus station using the wave communication of power line half, passenger
The network port for logging in computer using mobile phone A PP obtains each road bus arrival 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 passenger's waiting time by bus becomes very uncertain,
The crowded passenger on public transport having of bus for causing 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, while be also convenient for passenger riding.
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 in real time grasp the letter such as the current position of public transit vehicle, travel speed, direction
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 system is provided with the master controller of bus station in public transport terminus, and each bus station is provided with public transport stand control
Device, master controller passes through power line half-wave constructing communication network with each public transport station control.Each bus is provided with Vehicle Controller
Exchanged for carrying out wireless communication information with public transport station control, 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
Used as the place of point 1 and 30% to 45% is screened as point 2 is screened, the positive half cycle descending branch of cycle is close to communication disruption at 60% to 80% place
At the breakpoint of INT1, screen point and be arranged near the breakpoint of communication disruption INT1, filter off most of interference, and make communication in week
The position of the negative half-wave of ripple 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 through signal condition, resistance step-down, partial pressure, voltage stabilizing from electric power netting twine.
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, and through 5MS time delays, the output voltage of electricity pressure comparator ﹙ V1 ﹚ at point T1 is screened in single-chip microcomputer scanning, when all wave voltages
During the threshold voltage of Da Dao ﹙ V1 ﹚, output voltage produces saltus step, scanning to record timing time t1 during its saltus step；Same scanning note
The time t2 of electricity pressure comparator ﹙ V2 ﹚ output voltage saltus steps at point T2 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 for detecting be it is true, otherwise for
It is false.Be the disconnected INT1 in the fictitious time Central Shanxi Plain, perform to interrupt and return, when for it is true when d type flip flop set to 0, execute instruction：Open interrupt INT 1, described
I/O mouthfuls set to 0, the disconnected INT0 in the Central Shanxi Plain, 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 that the measured value of 100 grid cyclic wave times is taken into it in grid cyclic wave counting process to be averagely worth to.
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 through resistance step-down, letter 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 the Q termination single-chip microcomputers of d type flip flop A, the interruption
Mouth is set to level triggers.The D ends ground connection of d type flip flop A, its S end connects with I/O mouthfuls 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 taken interrupting
First it is followed by through 0.5MS time delays believing electronic switch all 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 disconnected INT1 in the Central Shanxi Plain, then communicated, communications electronics switch according to single-chip microcomputer corresponding port is connected to using communication mode, and
Signal condition is carried out, the sign off of this cycle within timing 9MS, shut-off communications electronics switch, S puts at end 1 makes out interruption etc.
The communication of next cycle is treated, is so gone round and begun again and is realized half wave communication.Main controller is sent out to each station control during this sign off
Shut-off communications electronics are sent to switch, the instruction of the disconnected INT1 in the Central Shanxi Plain.
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 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 Vehicle Controller of each circuit bus preset each station, to obtain
Position in traveling.When bus communicates with bus station, if public transport station control does not have bus in the time interval of setting
Arrive at a station, when being communicated with first bus for arriving at a station afterwards, marking signal M is sent in addition, the Vehicle Controller of bus will be marked
The actual measurement mileage that arrives at a station for having M compares calculating and arrives at a station mileage error with setting mileage, takes the mileage error of arriving at a station of more than 5 times
Value, is left out by setting ratio number of times and is up to station error for several times, and remaining is averaged as offset, for correcting in measurement
Journey.The time interval of the setting need to ensure while the bus for arriving at a station all leaves, and the next bus that arrives at a station is arrived at a station
Stop position.Its speed of some vehicles is exported with mileage signal using bus signals, then by its vehicle speed mileage data transmission unit
Obtain speed, mileage.
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 the I/O of 89C4051
Mouthful, it is stored in nonvolatile storage after being directly read by 89C4051,89C4051 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, is decoded for infrared receiving circuit and read
Arrive at a station signal.When the infrared receiver device that each public transport station control is installed receives the infrared signal of RF transmitter, will be infrared
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, realizes that information is handed over bus station after the Vehicle Controller response of the bus of parking of arriving at a station
Change, arrived at a station simultaneously during to channel transmission answer signal with many buses of circuit, public transport station control will continuously receive several
Wrong data bag or the intensity listened to after channel signals superposition transfinite, and illustrate that present channel is interfered, at this moment, each bus
By between its parking spot and site location apart from S, by bus travel direction, since 6 meters of site location is exceeded forward, from
It is dynamic, backward to 18-60 meters of point leaving from station, to fall into described Serial Number Range by S values to number according to every 6 meters of range incrementation numberings, on
Note generally there was only 2 to 3 cars while arriving at a station when stating setting.Public transport station control is to the bus disturbing line that arrives at a station according to the volume
Number order retransmits detection signal, as produced interference again if to the bus of failed communication, reduce described every 6 meters of scopes
Value does not repeat to number again, repeats said process to interference is not produced, and its numbering fails to during the next stop.When circuit possesses public transport
The preset numbering that will not be failed using fixation during car negligible amounts.
Public transport station control will arrive at a station send display to show after information processing, be easy to passenger to check.Public transport terminus is set
Main controller be connected by coupled computer and Internet, passenger is to log in the computer using mobile phone A PP
The network port obtain data in the bus arrival information of supervising software Zhong Ge roads.
(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 presentation of information board that arrives at a station.
(5) specific embodiment：
The wave communication of public bus network half is as shown in Figure 2 with the circuit structure block diagram of the presentation of information board that arrives at a station, comprising:
Master controller (1), public transport station control (3), the Vehicle Controller (4) of bus；Wherein Vehicle Controller (4) by
Infrared transmitter, infrared remote receiver, microcontroller, nonvolatile storage and kilometer sensor are constituted, and microcontroller is selected
89C4051 nonvolatile storages select AT24C32, and kilometer sensor output signal connects I/O mouthfuls of 89C4051.
Master controller (1), public transport station control (3) by infrared transmitter, infrared remote receiver, single-chip microcomputer, non-volatile deposit
Reservoir, cycle discriminator circuit, communications electronics switch, switch drive module and LCD display are constituted, and wherein master controller (1) leads to
Cross coupled computer and be connected to Internet (2).Single-chip microcomputer selects 89C55, and its single-chip microcomputer 89C55 is additionally operable to control
Communications electronics switch, switch drive module and cycle discriminator circuit, nonvolatile storage select AT24C64, wherein LCD display
I/O mouthfuls with 89C55 is connected, and the information of arriving at a station of bus is stored in nonvolatile storage AT24C64.
Cycle discriminator circuit is made up of input circuit, voltage zero-cross detection module and voltage comparator.Input circuit is used for
By mains AC voltage by resistance and the partial pressure of diode, the input voltage of voltage comparator suitably stabilization is converted to.
Voltage zero-cross detection module d type flip flop, voltage comparator selects LM393, and its reference voltage is using mu balanced circuit stabilization electricity
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.
Claims (2)
1. the wave communication of public bus network half and the presentation of information board that arrives at a station, it is characterized in that public transport terminus sets master controller, each public transport
Stand and public transport station control is set, master controller with each public transport station control by the wave communication of power line half, install by each bus
Vehicle 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
It is arranged on the positive half cycle descending branch of cycle, 60% to 80% place of crest voltage is used as screening the place of point 1 and 30% to 45% as Zhen
Other point 2, the positive half cycle descending branch of cycle is screened point and is arranged near the breakpoint of communication disruption close at the breakpoint of communication disruption, is filtered
Most of interference is gone, has made communication more accurate in the position of the negative half-wave of cycle；
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 for detecting is true；
Lock in time is using 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 that the measured value of 100 grid cyclic wave times is taken into it in grid cyclic wave counting process to be averagely worth to；
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 anti-phase rear square-wave signal of negative half-wave of grid cyclic wave are followed by believing electricity all when arriving through 0.5MS time delays
Sub switch, after 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 and switchs 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 device processed preset each station, with position in being travelled；When bus communicates with bus station, if setting when
Between in interval without bus arrival, when communicate with first bus for arriving at a station afterwards, transmission marking signal M, bus
Actual arrive at a station mileage and the setting mileage calculation that arrives at a station that measures when arriving at a station that Vehicle Controller will indicate M arrives at a station mileage error, takes 5 times
The mileage error amount that arrives at a station above, is left out by setting ratio number of times and is up to station error for several times, and remaining is averaged as compensation
It is worth for correcting measurement mileage, the time interval of the setting need to ensure while the bus for arriving at a station all leaves, and makes next
The bus that arrives at a station is stopped to station location；
Infrared communication is used between bus and bus station, bus station may the stop position several infrared emissions of installation in bus
Device and infrared receiving device, each infrared-emitting diode are realized sending out the bus for resting in diverse location using polling mode
Detection signal is sent, infrared launcher and infrared receiving device and microcontroller are housed in the Vehicle Controller of bus；Micro-control
Device processed selects 89C4051 chips, and public transport car kilometer output signal is connected to I/O mouthfuls of 89C4051, 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 decoding
Reading is arrived at a station signal；
Each bus station constitutes bus arrival information query system, each public transport station control according to the station bus circuit
Address cycle sends detection signal, realizes that information is exchanged with bus station after the Vehicle Controller response of the bus of parking of arriving at a station,
Arrived at a station simultaneously during to channel transmission answer signal with many buses of circuit, 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 6 meters of site location is exceeded 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 by S values to number, 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 disturb again
The bus of communication, reduce it is described do not repeat to number again every 6 meters of values of scope, repeat said process to not producing interference,
Its numbering fails to during the next stop；
Public transport station control will arrive at a station send display to show after information processing, be easy to passenger to check；The master that public transport terminus is set
Control device is connected by coupled computer and Internet, and passenger is the net that the computer is logged in using mobile phone A PP
Network port obtains the data in the bus arrival information of supervising software Zhong Ge roads.
2. the wave communication of public bus network according to claim 1 half and the presentation of information board that arrives at a station, it is characterised in that include:
Master controller (1), public transport station control (3), the Vehicle Controller (4) of bus；Wherein Vehicle Controller (4) is by infrared
Transmitter, infrared remote receiver, microcontroller, nonvolatile storage and kilometer sensor are constituted, and microcontroller selects 89C4051
Nonvolatile storage selects AT24C32, and kilometer sensor output signal connects I/O mouthfuls of 89C4051；
Master controller (1), public transport station control (3) 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, wherein master controller (1) by with its
Connected computer is connected to Internet (2)；Single-chip microcomputer selects 89C55, and its single-chip microcomputer 89C55 is additionally operable to control communication electricity
Sub switch, switch drive module and cycle discriminator circuit, nonvolatile storage select AT24C64, wherein LCD display with
I/O mouthfuls of 89C55 is connected；
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 the input voltage of voltage comparator suitably stabilization by resistance and the partial pressure of diode；Voltage
Zero passage detection module d type flip flop, voltage comparator selects LM393, its reference voltage to use 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710162549.4A CN106935062A (en) | 2017-03-18 | 2017-03-18 | The wave communication of public bus network half and the presentation of information board that arrives at a station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710162549.4A CN106935062A (en) | 2017-03-18 | 2017-03-18 | The wave communication of public bus network half and the presentation of information board that arrives at a station |
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| CN106935062A true CN106935062A (en) | 2017-07-07 |
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| CN201710162549.4A Pending CN106935062A (en) | 2017-03-18 | 2017-03-18 | The wave communication of public bus network half and the presentation of information board 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 CN201710162549.4A patent/CN106935062A/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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