CN2603581Y - Vehicle carried information service system based on controller LAN - Google Patents
Vehicle carried information service system based on controller LAN Download PDFInfo
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- CN2603581Y CN2603581Y CN 03242712 CN03242712U CN2603581Y CN 2603581 Y CN2603581 Y CN 2603581Y CN 03242712 CN03242712 CN 03242712 CN 03242712 U CN03242712 U CN 03242712U CN 2603581 Y CN2603581 Y CN 2603581Y
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- area network
- local area
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Abstract
The utility model is a multi-function vehicle information service terminal based on controller area network, including a cpu, an information receiving and transmission unit and a controller area network. The cpu is provided with a controller area network bus interface or a controller connected with controller area network. The information receiving and transmission unit is connected with the cup; the cpu is connected with the transceiver of controller area network through the controller area network bus interface or the controller of controller area network, the transceiver of controller area network is connected with the controller area network. The utility model is designed to provide a vehicle information service terminal based on controller area network, aimed at making the number of vehicle equipments installed on buses as few as possible, the function can be centralized as much as possible; the equipment which is dominated by one equipment and can not be integrated can communicate with the main equipment through the interface, which can reliaze the sharing of resources to maximum extent.
Description
Technical field: the utility model relates to a kind of integrated information service equipment, is a kind of automobile-used integrated information service terminal specifically.
Background technology: in recent years, intelligent transport technology has obtained using widely in China's public transport, has all set up corresponding system from design compilation, dispatching management to operation production links such as vehicle dynamic monitoring, and the application of these systems has improved the efficient that public transport is produced.A lot of mobile units have been installed on the bus, and as equipment such as vehicle location, voice communication, sound broadcasts, these equipment are being brought into play different effects separately, have inherent association on the whole again, are that the whole intelligent public transportation system institute that plays a role is requisite.But the installation of a large amount of mobile units has caused the confusion of environment inside car, has also brought trouble for maintenance and trouble free service.
On the bus multiple vehicle electronic device is installed at present, mainly contains:
1. positioning equipment: adopt the gps satellite location technology, vehicle is located in real time, and as required locator data is sent to Surveillance center;
2. speech communication equipment: realize the speech communication between dispatcher and the driver;
3. station reporting instrument: the pre-reception centre of the mode information that adopts voice (part has literal to show synchronously) to report;
4. video machines (VCD); Put pictures and sounds program (advertisement, amusement, out of Memory etc.);
5. IC-card Fare Collection System: realize the electronic bus ticketing;
6. LED display: show arrive at a station, Word message such as public good.
Because at present the electronic equipment of installing on the bus all is function singleness, mutual incoherent autonomous device one by one, the subject matter of its existence has:
1. the various device self-organizing system is uncorrelated mutually, even there is the relation can not resource-sharing in logic;
2. some subfunction is overlapping causes waste;
3. equipment install do things in his own way, cable is mixed and disorderly, influences attractive in appearance;
4. form potential safety hazard easily, also increased energy consumption simultaneously.
Summary of the invention: the purpose of this utility model provides a kind of on-vehicle information service terminal based on controller local area network, be intended to make the mobile unit quantity of installing on the bus the least possible, function is concentrated as far as possible, based on a kind of equipment, equipment that can not be integrated communicates by interface and main equipment, realizes that resource is shared to greatest extent.
The purpose of this utility model is achieved by following technical proposals:
A kind of multifunctional vehicle mounted information service terminal based on controller local area network of the present utility model comprises central processing unit, message pick-up transmission unit, controller local area network.Wherein, central processing unit has the Controller Area Network BUS interface or is connected with the controller of controller local area network.
Described message pick-up transmission unit is connected with central processing unit; Central processing unit is connected with the transceiver of controller local area network by the controller of Controller Area Network BUS interface or controller local area network, and the transceiver of controller local area network is connected with controller local area network.
Handle interface and RS232 interface or 485 interfaces can be arranged on the described central processing unit.
Described message pick-up transmission unit is made up of positioning unit, remote radio communication unit or short-range wireless transmission unit, and above-mentioned three unit can be selected to use as required, separately or constitute the message pick-up transmission unit.
Described positioning unit is made of global location module and inertia gyroscope system.
Described remote radio communication unit is made of GPRS module or CDMA module.
Described short-range wireless transmission unit is made up of bluetooth module.
On-vehicle information service terminal of the present utility model can also increase power module, and an end is connected with automobile storage battery, and input voltage can be in the 5V-50V range, and output voltage keeps stable multichannel output.As required, power module can provide power supply for each module of on-vehicle information service terminal, and each external equipment that connects on can also the controller local area network for the on-vehicle information service terminal provides power supply.
The course of work of on-vehicle information service terminal of the present utility model is as follows: the on-vehicle information service terminal and the external world all pass through the long-range of message pick-up transmission unit or short-range wireless communication module real-time implementation as exchange messages such as Surveillance center, junction, station, station board, crossings, and other electronic equipment exchange message of on-vehicle information service terminal and Che Nei all realizes by controller local area network.For example extraneous as Surveillance center or interior all electronic equipments of car can obtain information such as position that positioning unit provides, speed, time in real time by it.
The applied controller local area network technology of the utility model, i.e. CAN bus, full name be "
Controller Area Network", be one of most widely used fieldbus in the world.CAN is a kind of serial communication bus of many master modes, and basic design specification requires that high bit rate is arranged, high anti-electromagnetic interference, and can detect any mistake of generation.CAN can provide up to being the message transmission rate of 1Mbit/s.The CAN bus adopts how main working method, is regardless of the principal and subordinate between the node, but the branch of priority is arranged.Communication mode is flexible, can realize point-to-point, a bit to multiple spot or broadcast mode transmission data, need not dispatch.Adopt non-destructive bus president technology, priority sends, and can reduce the time of bus arbitration greatly, and is functional under heavy load.CAN adopts short frame structure transmission data, and every frame valid data are 8 bytes.Transmission time is short, and the possibility of being disturbed is little.Every frame all has CRC check or other error check means, and error probability is low.When node gross error, can close this node automatically, make other node on the bus unaffected.
The CAN bus has following key property:
1, low cost;
2, high total line use ratio;
3, high-speed data transmission speed (up to 1Mbit/s);
4, far data transmission distance (reach 10Km, the message transmission rate up to 50Kbit/s still can be provided);
5, can receive or shield this message according to the ID decision of message;
6, reliable fault processing and error-detection mechanism;
7, after the information of Fa Songing is destroyed, can retransmit automatically;
8, node has the function that withdraws from bus automatically under wrong serious situation;
9, message does not comprise source address or destination address, only comes deixis information, priority with identifier.
On-vehicle information service terminal of the present utility model has been brought into play the advantage of CAN bus at design aspect, utilize CAN with the electronic information application terminal on the car,, media player many as Vehicle Positioning Equipment, voice communication equipment etc. links together, to reach the target of sharing information resources, finish the intelligent process of vehicle.Specifically, have the following advantages:
1, realizes the intercommunication interconnection of in-vehicle device, reached information resources and share, avoided the resource repeated construction
2, the message pick-up transmission unit is made of positioning unit, remote radio communication unit and short-range wireless communication unit, global-positioning technology, long distance wireless voice and data communication technology and short-range wireless communication technology have been used, can satisfy present and the intelligent required information service of public transit vehicle in the future, and three above-mentioned unit can require independent assortment according to the difference of vehicle, to reach the optimum balance of cost and function, if there is the increase of needs unit also very convenient.
3, equipment itself can be equipped with the power module centrally connected power supply, realizes simple, the power supply effectively and reliably of circuit.
4, solved at present because multiple mobile unit coexistence on the bus, and the confusion of the environment inside car that causes, the problem of maintenance and trouble free service difficulty.
5, infrastructure device can be finished by once-paving, just can realize that not continuing of function increases and upgrading as long as increase external application terminal.
Description of drawings: accompanying drawing is the general diagram of a kind of on-vehicle information service terminal based on controller local area network of the utility model
Embodiment: the utility model is further described below in conjunction with drawings and Examples.
As the on-vehicle information service terminal of scheming to design, comprise the controller of central processing unit, message pick-up transmission unit, controller local area network, transceiver, RS232 interface, handle interface and the power module of controller local area network; Wherein the message pick-up transmission unit is made up of positioning unit, remote radio communication unit or short-range wireless communication unit; Three unit that the message pick-up transmission unit is comprised are connected with central processing unit respectively; The transceiver of controller local area network is connected with central processing unit by the controller of controller local area network; RS232 interface and handle interface are arranged on the central processing unit; Power module is connected with automobile storage battery, can provide power supply for each module of on-vehicle information service terminal, can also provide power supply for each the function external equipment that is connected with the on-vehicle information service terminal.
As the central processing unit of scheming designed on-vehicle information service terminal adopts common CPU, CAN controller employing SJA1000, CAN transceiver employing PCA82C250.Also can use the single-chip microcomputer 8XC592 series of tape controller local area network bus interface to replace common CP U, just not need external CAN controller, and on single-chip microcomputer 8XC592 series, directly connect the CAN transceiver, particularly can select the 82C592+CAN transceiver for use.
As scheme designed on-vehicle information service terminal, its message pick-up transmission unit is made up of positioning unit, remote radio communication unit or short-range wireless communication unit, wherein positioning unit is made of global location module and inertia gyroscope system, can select global location (GPS) the module M12 of motorola inc for use, gps antenna is set outside car.And block (as high buildings and large mansions, viaduct, the tunnel etc.) that always exist in the city, and make mobile unit can not receive global location (GPS) signal, therefore increase inertia gyroscope and obtain positional information by boat position Calculation Method.
The remote radio communication unit is selected the GPRS technology for use.Have the following advantages: 1. always online:, do not have disconnection as long as after activating the GPRS application, will keep online forever; Be similar to a kind of wireless private line network.2. charge according to quantity:, needn't worry cost issues though can keep always online; Because just charge when having only the communication flows of generation.It is a kind of towards the charging of using, and charging way is more scientific and reasonable.3. login fast: brand-new packet service need not to dial for a long time the process that connects in the past.4. switch freely: speech and data service can be switched use, and conversation is neglected neither with transfer of data.5. the highest theoretical transmission speed of high-speed transfer: GPRS is 171.2kbps, uses GPRS can support transmission rate about 40Kbps at present.This unit can be selected the G18 module of motorola inc for use.
The short-range wireless transmission unit has been used Bluetooth technology.Have the following advantages: the ISM band (industry, science and medical frequency range) that is operated in 2.4G.Adopted the equipment of Bluetooth technology that exchanges data speed up to 720Kbit/s can be provided.When the power of bluetooth equipment was 1MW (0dbm), its transmitting boundary generally can reach 10M, increased power and can make the transmission receiving range reach 100 meters.Bluetooth technology has also adopted frequency hopping to eliminate and has disturbed and reduce and declined.When detecting distance less than 10m, accepting device is the regulatory work rate dynamically.When traffic carrying capacity reduced or stop, bluetooth equipment can enter low-power working mode.Can see through wall, pocket and briefcase between each equipment communicates.This unit can be selected the bluetooth module BGB201 of PHILIPS for use.
Claims (10)
1, a kind of on-vehicle information service terminal based on controller local area network is characterized in that comprising central processing unit, message pick-up transmission unit, controller local area network;
Wherein, central processing unit has the Controller Area Network BUS interface or is connected with the controller of controller local area network;
The message pick-up transmission unit is connected with central processing unit;
Central processing unit is connected with the transceiver of controller local area network by the controller of Controller Area Network BUS interface or controller local area network, and the transceiver of controller local area network is connected with controller local area network.
2, a kind of on-vehicle information service terminal based on controller local area network according to claim 1 is characterized in that being connected with on the central processing unit handle interface and RS232 interface or 485 interfaces.
3, a kind of on-vehicle information service terminal based on controller local area network according to claim 1 is characterized in that also comprising power module.
4, a kind of on-vehicle information service terminal based on controller local area network according to claim 2 is characterized in that also comprising power module.
5, according to claim 1,2,3 or 4 described a kind of on-vehicle information service terminals based on controller local area network, it is characterized in that the message pick-up transmission unit is made up of positioning unit, positioning unit is made of global location module and inertia gyroscope system.
6, according to claim 1,2,3 or 4 described a kind of on-vehicle information service terminals based on controller local area network, it is characterized in that the message pick-up transmission unit is made up of the remote radio communication unit, the remote radio communication unit is made of GPRS module or CDMA module.
7, a kind of on-vehicle information service terminal based on controller local area network according to claim 5 is characterized in that the message pick-up transmission unit also comprises the remote radio communication unit, and the remote radio communication unit is made of GPRS module or CDMA module.
8, a kind of on-vehicle information service terminal based on controller local area network according to claim 5 is characterized in that the message pick-up transmission unit also comprises the short-range wireless transmission unit, and the short-range wireless transmission unit is made up of bluetooth module.
9, a kind of on-vehicle information service terminal based on controller local area network according to claim 7 is characterized in that the message pick-up transmission unit also comprises the short-range wireless transmission unit, and the short-range wireless transmission unit is made up of bluetooth module.
10, a kind of on-vehicle information service terminal based on controller local area network according to claim 6 is characterized in that the message pick-up transmission unit also comprises the short-range wireless transmission unit, and the short-range wireless transmission unit is made up of bluetooth module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03242712 CN2603581Y (en) | 2003-03-28 | 2003-03-28 | Vehicle carried information service system based on controller LAN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03242712 CN2603581Y (en) | 2003-03-28 | 2003-03-28 | Vehicle carried information service system based on controller LAN |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2603581Y true CN2603581Y (en) | 2004-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 03242712 Expired - Fee Related CN2603581Y (en) | 2003-03-28 | 2003-03-28 | Vehicle carried information service system based on controller LAN |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101385032B (en) * | 2006-02-15 | 2010-08-25 | 汤姆森许可贸易公司 | Method and apparatus for controlling the number of devices installed in an authorized domain |
| CN102082824A (en) * | 2010-12-23 | 2011-06-01 | 深圳市领华卫通数码科技有限公司 | Vehicle-carried Internet access device and system |
| CN102625481A (en) * | 2012-02-23 | 2012-08-01 | 深圳市蓝度汽车电控技术有限公司 | System and device of vehicle information application |
-
2003
- 2003-03-28 CN CN 03242712 patent/CN2603581Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101385032B (en) * | 2006-02-15 | 2010-08-25 | 汤姆森许可贸易公司 | Method and apparatus for controlling the number of devices installed in an authorized domain |
| CN102082824A (en) * | 2010-12-23 | 2011-06-01 | 深圳市领华卫通数码科技有限公司 | Vehicle-carried Internet access device and system |
| CN102625481A (en) * | 2012-02-23 | 2012-08-01 | 深圳市蓝度汽车电控技术有限公司 | System and device of vehicle information application |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |