CN106060162A - Urban-rural bus information service system - Google Patents
Urban-rural bus information service system Download PDFInfo
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- CN106060162A CN106060162A CN201610542525.7A CN201610542525A CN106060162A CN 106060162 A CN106060162 A CN 106060162A CN 201610542525 A CN201610542525 A CN 201610542525A CN 106060162 A CN106060162 A CN 106060162A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003993 interaction Effects 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 3
- 101000746134 Homo sapiens DNA endonuclease RBBP8 Proteins 0.000 claims 1
- 101000969031 Homo sapiens Nuclear protein 1 Proteins 0.000 claims 1
- 102100021133 Nuclear protein 1 Human genes 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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
- H04L67/50—Network services
- H04L67/55—Push-based network services
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/0018—Communication with or on the vehicle or train
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or train for signalling purposes
- B61L15/009—On-board display devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/025—Absolute localisation, e.g. providing geodetic coordinates
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- 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
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Traffic Control Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention belongs to the technical field of information service, and particularly relates to an urban-rural bus information service system. The urban-rural bus information service system is convenient in power supply, bus position display and information query. The system comprises a stop board, a bus position information positioning and transmission part and a data transceiving and processing part of a server; the stop board comprises a solar receiving panel, a solar charging control circuit, a storage battery, a main control chip, a data transmission circuit, a temporary charging interface, a screen display interface, a liquid crystal display screen and a first voltage conversion circuit; the main control chip is separately connected with the data transmission circuit, the screen display interface and the first voltage conversion circuit; the first voltage conversion circuit is separately connected with the storage battery, the temporary charging interface and the data transmission circuit; and the storage battery is connected with the solar receiving panel via the solar charging control circuit.
Description
Technical field
The invention belongs to information services field, particularly relate to a kind of Town bus information service system.
Background technology
It is known that the bus-stop in the most domestic line city has been able to as people provider's public transport the most efficiently
Information inquiry, and small part can also show current bus location information in real time, and its remote data transmission performance is unreliable,
The situations such as data transmission fault, net drop often occur.Though for comparing traditional papery bus route information
Through the most intelligent.But being as the fast development of society, bus has been able to reach a few minutes inside urban district and just comes one
Regular bus, causes these public transport positional informationes to show seem less than for the people in city important.And it remotely counts
Unreliable according to transmission performance, data transmission fault often there is, the situation of the system instability such as net drop.Along with town and country one
The development of body, the passenger vehicle in the most a lot of arrival cities, small towns the most still has half an hour or the one hour even more time one
Class.If not arriving in the very nick of time that regular bus, then the time of delay will be double.So it is a kind of for the people between cities and towns and rural area
Passenger vehicle information inquiry platform is provided to be particularly important.And the station board of Town bus is unlike city bus, there is electricity at any time
Source provides, and based on this, the present invention proposes a kind of new Town bus information service system.
Summary of the invention
The present invention is aiming at the problems referred to above, it is provided that the city of a kind of power conveniently, be easy to passenger vehicle position display, Query Information
Township's passenger vehicle information service system.
For achieving the above object, the present invention adopts the following technical scheme that, the present invention includes that station board, passenger vehicle positional information position
And the data transmit-receive of hop and server processes part.
Described station board includes that solar panel, solar charging electric control circuit, accumulator, main control chip, data are transmitted
Circuit, interim charging inlet, screen display interface, LCDs and the first voltage conversion circuit, main control chip respectively with number
According to transmission circuit, screen display interface, the first voltage conversion circuit be connected, voltage conversion circuit respectively with accumulator, fill temporarily
Electrical interface, data transmission circuit are connected, and accumulator is connected with solar panel by solar charging electric control circuit.
Described passenger vehicle positional information location and hop include the second voltage conversion circuit, controller chip, remotely
Data transmission circuit and positioning chip, controller chip respectively with the second voltage conversion circuit, remote data transmission circuit, location
Chip is connected, the output port of the second voltage conversion circuit respectively with power port, the remote data transmission circuit of positioning chip
Power port be connected.
Remote data transmission circuit carries out wireless data exchange with the data transmit-receive process part of server, the number of server
Wireless data exchange is carried out with data transmission circuit according to transmitting-receiving process part.
As a kind of preferred version, station board upper end of the present invention is provided with transparent baffle, and both sides, station board lower end are provided with
Prop up spike.
As another kind of preferred version, solar charging electric control circuit of the present invention uses CN3717 charge controlling chip
U1, described main control chip uses STM32F103 chip U2, and 16 feet of U1 are connected with the gate pole of the Q1 of P-channel metal-oxide-semiconductor, the source of Q1
Pole is connected with output port, the positive pole of diode D5 of solar panel respectively, and the negative pole of D5 passes through the 5 of resistance R4 Yu U1
Foot is connected；The drain electrode of Q1 passes sequentially through Zener diode D1, inductance L1, diode D2 are connected with accumulator, and accumulator is by dividing
Piezoresistance is connected with 11 feet of U2；18 feet of U2 are connected with the gate pole of N-channel MOS pipe Q2, the source ground of Q2, the drain electrode of Q2 with
6 feet of U1 are connected.
As another kind of preferred version, the first voltage conversion circuit of the present invention uses MP2494 chip and AS1117 core
Sheet.
As another kind of preferred version, the second voltage conversion circuit of the present invention uses LM2596 chip.
As another kind of preferred version, after positioning chip of the present invention is by network positions or satellite fix, will be fixed
Position information package is transferred to controller chip, and it is sent to remote data transmission circuit by protocol format by controller chip,
After be sent to server by remote data transmission circuit；Server opens a local communication port after powering, monitors input
Data；When receiving the data that remote data transmission circuit is sent, it is right that server is gone out by the Context resolution in lookup data base
Whether coach route information, the inquiry answered have user to need Current vehicle arriving reminding, if having, being pushed to user, providing correspondence
The specified coordinate of domestic map, store the position that more new car numbering is corresponding, and be forwarded to each passenger vehicle station board；Described liquid crystal display
Screen is mainly used in showing the data that send of passenger vehicle and inquiring about data for user.
As another kind of preferred version, the present invention includes that cell-phone customer terminal, the information of the account of user's registration are sent to
Server stores；Server is sent to cell phone customer according to will be arrived at a station by passenger vehicle information, passenger vehicle positional information of the instruction of user
End.
As another kind of preferred version, cell-phone customer terminal of the present invention includes data communication port and server interaction
Protocol data receiving port, map calling interface, map calling interface is to receive the positional information that server forwards
Time, by reading Baidu's map or the API map inquiry interface of Google Maps use.
Secondly, data transmission circuit of the present invention uses GU906 chip U12, the 21 of U12,22 feet and the 13 of U2,12 feet
Corresponding be connected, the 30 of U12,29,28,27 feet are corresponding with CLK, DATA, RST, VDD foot of SIM is connected, 39 feet of U12 and sky
Line is connected.
It addition, the data that remote data transmission circuit of the present invention sends include the packet header of 1 byte, 2 bytes
Data length, the car numbering of 4 bytes, the positional information of 10 bytes, 1 byte directional information.
Beneficial effect of the present invention.
The present invention can be people provider's passenger vehicle information inquiry the most efficiently, and interim mobile phone electricity supplements, and saves people
Travel time, and can traffic and power supply inconvenient area provide passenger vehicle information service.
It is that accumulator is charged that this system station board display part divides by solar energy, provides power supply for station board.
Each passenger vehicle positional information of station board real-time reception, and by positional information current for passenger vehicle in real time, demonstrate dynamically
Coming, and station board provides interim charging service, station board also provides for inquiry service.
The part of passenger car system mainly provides with positional information and is as the criterion, by remote data transmission, by as the visitor of prelocalization
Truck position information is sent to the webserver by certain protocol format.The webserver is after receiving information, by information solution
Analysis, storage are also transmitted to each station board system.When people need to check in advance industry and traffic positional information, cell phone customer can be logged in
End inputs oneself inquisitive passenger vehicle information and inquires about, in order to arrange the travel time of oneself.
Accompanying drawing explanation
The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.Scope not only limits to
Statement in herein below.
Fig. 1 is inside schematic diagram and the outline drawing that the present invention designs passenger vehicle station board part.
Fig. 2 is that the present invention designs passenger vehicle positional information location and the inside schematic diagram of transmission.
Fig. 3 is the data transmit-receive process part of design server of the present invention.
Fig. 4 is cell-phone customer terminal query portion and interfacial structure figure during the present invention designs.
Fig. 5 is the mains voltage conversion of the station board during the present invention designs, electric quantity acquisition, locating interface, screen interface, data
The circuit parts such as transmission, download program.
Fig. 6 is that the station board solar storage battery charging control section during the present invention designs is divided.
Fig. 7 is for carrying out teledata alternating transmission part in station board and bus.
Detailed description of the invention
As it can be seen, the data that the present invention includes station board, passenger vehicle positional information location and hop and server are received
Send out and process part.
Described station board includes that solar panel, solar charging electric control circuit, accumulator, main control chip, data are transmitted
Circuit, interim charging inlet, screen display interface, LCDs and the first voltage conversion circuit, main control chip respectively with number
According to transmission circuit, screen display interface, the first voltage conversion circuit be connected, voltage conversion circuit respectively with accumulator, fill temporarily
Electrical interface, data transmission circuit are connected, and accumulator is connected with solar panel by solar charging electric control circuit.
Described passenger vehicle positional information location and hop include the second voltage conversion circuit, controller chip, remotely
Data transmission circuit and positioning chip, controller chip respectively with the second voltage conversion circuit, remote data transmission circuit, location
Chip is connected, the output port of the second voltage conversion circuit respectively with power port, the remote data transmission circuit of positioning chip
Power port be connected.
Remote data transmission circuit carries out wireless data exchange with the data transmit-receive process part of server, the number of server
Wireless data exchange is carried out with data transmission circuit according to transmitting-receiving process part.
Described station board upper end is provided with transparent baffle, and both sides, station board lower end are provided with a spike.
Described solar charging electric control circuit uses CN3717 charge controlling chip U1, and described main control chip uses
16 feet of STM32F103 chip U2, U1 are connected with the gate pole of the Q1 of P-channel metal-oxide-semiconductor, the source electrode of Q1 respectively with solar panel
Output port, the positive pole of diode D5 be connected, the negative pole of D5 is connected by 5 feet of resistance R4 with U1；The drain electrode of Q1 is led to successively
Cross Zener diode D1, inductance L1, diode D2 are connected with accumulator, and accumulator is connected with 11 feet of U2 by divider resistance；
18 feet of U2 are connected with the gate pole of N-channel MOS pipe Q2, the source ground of Q2, and the drain electrode of Q2 is connected with 6 feet of U1.
Described first voltage conversion circuit uses MP2494 chip and AS1117 chip.
Described second voltage conversion circuit uses LM2596 chip.
After described positioning chip is by network positions or satellite fix, location information package is transferred to controller core
Sheet, it is sent to remote data transmission circuit by protocol format, is finally sent by remote data transmission circuit by controller chip
To server；Server opens a local communication port after powering, monitors input data；Receiving remote data transmission electricity
During the data that road is sent, whether server goes out the coach route information of correspondence, inquires about by searching the Context resolution in data base
There is user to need Current vehicle arriving reminding, if having, being pushed to user, providing the specified coordinate of map in corresponding country, storage more
The position that new car numbering is corresponding, and it is forwarded to each passenger vehicle station board；Described LCDs is mainly used in showing that passenger vehicle transmitted
The data and the confession user that come inquire about data.
Described controller chip detects network in real time and the most normally connects, if there is disconnected situation, then by needs
Information temporarily preserves, and is sent after network-in-dialing, if information is too much, this locality cannot all preserve, then with up-to-date
Information is main.Owing to every information data amount is not big especially, controller chip internal memory can be used here.So, originally
Invention can ensure that network data can be sent in server in time.
The present invention includes that cell-phone customer terminal, the information of the account of user's registration are sent to server storage；Server root
It is sent to cell-phone customer terminal according to will be arrived at a station by passenger vehicle information, passenger vehicle positional information of the instruction of user.The present invention can dynamically by
Each passenger vehicle positional information is supplied to mobile phone A PP, passenger vehicle platform in real time, provides interim charging service and display information to needs
People；So that it can arrange the travel time.
Described cell-phone customer terminal includes that protocol data receiving port, the map of data communication port and server interaction calls
Interface, map calling interface is when receiving the positional information that server forwards, by reading Baidu's map or Google
The API map inquiry interface that map uses.
Described data transmission circuit uses GU906 chip U12, the 21 of U12,22 feet with the 13 of U2,12 feet are corresponding is connected,
The 30 of U12,29,28,27 feet corresponding with CLK, DATA, RST, VDD foot of SIM be connected, 39 feet of U12 are connected with antenna.
Described remote data transmission circuit send data include the packet header of 1 byte, the data length of 2 bytes, 4
The car numbering of byte, the positional information of 10 bytes, 1 byte directional information.
The work process of the present invention is described below in conjunction with the accompanying drawings.
In Fig. 1, the live part of accumulator is converted into electric energy after being collected solar energy by solar panel, through L2 passage
It is transferred to (Fig. 6 uses CN3717 charge controlling chip) solar charging electric control circuit and flows to accumulator through L6 again.?
If transmitting procedure detecting, accumulator has been filled with that [(this led can be bright when full by the duty of D5 in detection Fig. 6
Get up) and AD sampling (such as BAT_ADC position in the accumulator electric-quantity of Fig. 5, reading the voltage changed the time, it may be judged whether electricity is full of)
Dual cooperation], then can automatically cut off charging (by controlling 16 pins of U1 in Fig. 6).Main control chip, data transmission circuit are (former
Reason figure is Fig. 7), interim charging inlet, this three partial circuit of screen display interface use voltage the most inconsistent, so centre is adopted
With MP24943+AS1117 two voltage conversion circuit, (Fig. 5 includes that MP24943 conversion is former to convert voltages into required voltage
Reason figure) wherein Vin is for inputting, and EN controls for enabling, and+5v is voltage output.Dotted line (7) LCDs is mainly used in display
Data and confession user that passenger vehicle sends inquire about data.Transparent baffle, the various impacts brought in time blocking rainy.
L1, L3, L4, L5, L7 are data line circuit.Station board props up spike and is mainly used in installing.
In Fig. 2, L10 is passenger vehicle power taking interface, equally needs by voltage conversion circuit (LM2596 width electricity after L10 turns on
Pressure conversion) power to controller chip, remote data transmission circuit, positioning chip.When positioning chip by network positions or
After satellite fix, location information package being transferred to control chip, it is sent to by control chip again by certain protocol format
Teledata transtation mission circuit, is finally sent to server by teledata transtation mission circuit.In Fig. 3, server can be beaten after powering
Open a local communication port, monitor the data of each client.Receiving the data that Fig. 2 sends, (data specifically include that
Packet header (1 byte), data length (2 bytes), car numbering (4 bytes), positional information (10 bytes), directional information (1
Individual byte)) time, server performs protocol analysis and applies that (major part of protocol analysis has: in lookup data storehouse
Hold), parse correspondence coach route information, inquiry whether have user to need Current vehicle arriving reminding, if having, be pushed to
User, analyze the specified coordinate of map in corresponding country, store position corresponding to more new car numbering and be forwarded to each passenger vehicle
Station board).In Fig. 4, after cell-phone customer terminal is opened, user needs to register an account.The information of the account of registration can be sent to
Server stores.After having registered, user can perform remind passenger vehicle will arrive at a station arrange wait operate.User can also be by real
Time check a certain passenger vehicle positional information, whether arrive at a station with the friends and family that this knows oneself.Data communication port, agreement
Data receiver mouth is mainly used and server interaction.Map calling interface is to receive the positional information that server forwards
It is, by reading the API map inquiry interface as used when Baidu's map or Google Maps.
It is understood that above with respect to the specific descriptions of the present invention, be merely to illustrate the present invention and be not limited to this
Technical scheme described by inventive embodiments, it will be understood by those within the art that, still can carry out the present invention
Amendment or equivalent, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
In.
Claims (10)
1. Town bus information service system, it is characterised in that include station board, passenger vehicle positional information location and hop and
The data transmit-receive of server processes part；
Described station board include solar panel, solar charging electric control circuit, accumulator, main control chip, data transmission circuit,
Interim charging inlet, screen display interface, LCDs and the first voltage conversion circuit, main control chip transmits with data respectively
Circuit, screen display interface, the first voltage conversion circuit be connected, voltage conversion circuit respectively with accumulator, interim charging inlet,
Data transmission circuit is connected, and accumulator is connected with solar panel by solar charging electric control circuit；
Described passenger vehicle positional information location and hop include the second voltage conversion circuit, controller chip, teledata
Transmission circuit and positioning chip, controller chip respectively with the second voltage conversion circuit, remote data transmission circuit, positioning chip
Be connected, the output port of the second voltage conversion circuit respectively with power port, the electricity of remote data transmission circuit of positioning chip
Source port is connected；
Remote data transmission circuit carries out wireless data exchange with the data transmit-receive process part of server, and the data of server are received
Send out process part and carry out wireless data exchange with data transmission circuit.
Town bus information service system the most according to claim 1, it is characterised in that described station board upper end is provided with transparent
Baffle plate, both sides, station board lower end are provided with a spike.
Town bus information service system the most according to claim 1, it is characterised in that described solar charging electric control circuit
Using CN3717 charge controlling chip U1, described main control chip uses STM32F103 chip U2,16 feet of U1 and P-channel metal-oxide-semiconductor
Q1 gate pole be connected, the source electrode of Q1 is connected with output port, the positive pole of diode D5 of solar panel respectively, D5's
Negative pole is connected by 5 feet of resistance R4 with U1；The drain electrode of Q1 passes sequentially through Zener diode D1, inductance L1, diode D2 and storage
Battery is connected, and accumulator is connected with 11 feet of U2 by divider resistance；18 feet of U2 are connected with the gate pole of N-channel MOS pipe Q2, Q2
Source ground, the drain electrode of Q2 is connected with 6 feet of U1.
Town bus information service system the most according to claim 1, it is characterised in that described first voltage conversion circuit is adopted
With MP2494 chip and AS1117 chip.
Town bus information service system the most according to claim 1, it is characterised in that described second voltage conversion circuit is adopted
Use LM2596 chip.
Town bus information service system the most according to claim 1, it is characterised in that described positioning chip is fixed by network
Behind position or satellite fix, location information package being transferred to controller chip, controller chip is pressed protocol format and is sent
To remote data transmission circuit, finally it is sent to server by remote data transmission circuit；Server opens one after powering
Local communication port, monitors input data；When receiving the data that remote data transmission circuit is sent, server is by searching number
Go out the coach route information of correspondence according to the Context resolution in storehouse, whether inquiry has user to need Current vehicle arriving reminding, if having
Then it is pushed to user, provides the specified coordinate of map in corresponding country, store the position that more new car numbering is corresponding, and be forwarded to each
Passenger vehicle station board；Described LCDs is mainly used in showing the data that send of passenger vehicle and inquiring about data for user.
The most according to claim 1, Town bus information service system, it is characterised in that include cell-phone customer terminal, user registers
The information of account be sent to server storage；Passenger vehicle will be arrived at a station information, passenger vehicle position by server according to the instruction of user
Confidence breath is sent to cell-phone customer terminal.
Town bus information service system the most according to claim 7, it is characterised in that described cell-phone customer terminal includes data
The protocol data receiving port of COM1 and server interaction, map calling interface, map calling interface is for receive service
During the positional information that device forwards, by reading Baidu's map or the API map inquiry interface of Google Maps use.
Town bus information service system the most according to claim 3, it is characterised in that described data transmission circuit uses
GU906 chip U12, the 21 of U12,22 feet with the 13 of U2,12 feet are corresponding is connected, the 30 of U12,29,28,27 feet and SIM
CLK, DATA, RST, VDD foot correspondence is connected, and 39 feet of U12 are connected with antenna.
Town bus information service system the most according to claim 1, it is characterised in that described remote data transmission circuit is sent out
The data sent include the position letter of the packet header of 1 byte, the data length of 2 bytes, the car numbering of 4 bytes, 10 bytes
Breath, 1 byte directional information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610542525.7A CN106060162B (en) | 2016-07-12 | 2016-07-12 | Urban and rural passenger car information service system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610542525.7A CN106060162B (en) | 2016-07-12 | 2016-07-12 | Urban and rural passenger car information service system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106060162A true CN106060162A (en) | 2016-10-26 |
| CN106060162B CN106060162B (en) | 2023-04-07 |
Family
ID=57185252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610542525.7A Active CN106060162B (en) | 2016-07-12 | 2016-07-12 | Urban and rural passenger car information service system |
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| CN (1) | CN106060162B (en) |
Cited By (1)
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| CN107676500A (en) * | 2017-08-28 | 2018-02-09 | 铜陵百锐设备配件有限公司 | A kind of solar energy spiral compression valve |
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| CN106060162B (en) | 2023-04-07 |
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