CN2800362Y

CN2800362Y - Intelligent vehicle-carried information terminal

Info

Publication number: CN2800362Y
Application number: CN 200420121027
Authority: CN
Inventors: 常青; 冯鲁民; 刘旭; 吴鑫山; 王力军
Original assignee: Beihang University
Current assignee: Beihang University; Beijing University of Aeronautics and Astronautics
Priority date: 2004-12-31
Filing date: 2004-12-31
Publication date: 2006-07-26
Anticipated expiration: 2014-12-31

Abstract

The utility model relates to an intelligent vehicle-carried information terminal which is mainly composed of a core circuit and a peripheral circuit, wherein the core circuit is a processor module of an embedded type and mainly comprises a CPU of an embedded type, a FLASH memory and an SDRAM memory; the peripheral circuit comprises a GPS positioning module, a GPRS communication module, an LCD display module, a voice module, a power control module, an extending interface module, etc. The utility model has the advantages at the function aspect that apart from the navigation function of the existing autonomous navigation terminal, the terminal of the utility model also has a plurality of additional functions, such as information collection, information service, information management, fault alarm, etc. The utility model also has the advantages at the structure aspect that the terminal adopts the design of a separate type of the core circuit and the peripheral circuit, which can isolate interference of the peripheral circuit to a processor circuit and can be convenient for extending functions and reduce cost. Because a peripheral board adopts the design of a board with double surfaces, under the condition of not changing the core circuit, the peripheral circuit can be directly renewed and extending functions and saving cost can be realized.

Description

Intelligent vehicle-carried information terminal

Technical field

The utility model relates to a kind of board information terminal.

Background technology

Along with the quick growth of automobile quantity, it is more and more serious that the phenomenon of road congestion, traffic hazard, environmental pollution, energy dissipation worldwide becomes.Therefore, the traffic that more and more needs to utilize high-tech means to improve and be on the rise, thereby make one to cross over multi-disciplinary emerging research field-intelligent transportation system (Intelligent Transport System, ITS) arise at the historic moment, we can say, ITS is the inevitable outcome that Modern Traffic develops into certain phase, also is the megatrend of international traffic development.And the location of moving vehicle is the important content of ITS research with navigation, concerning based on driver's traffic user, the effect of ITS embodies a concentrated reflection of its integrated information service function, comprise the data information of road and surrounding enviroment information, Real-time Traffic Information, trip route selection, dynamic route guiding, tourism and related service facility etc., the realization of all these functions finally all needs Vehicular navigation system directly to finish or provide support.

Vehicular navigation system is the integrated high-tech system ensemble of using Automatic Vehicle Location technology, geographic information system technology, database technology, multimedia technology and modern communication technology etc.Vehicular navigation system mainly can be divided into two classes at present, one class is autonomous type (distributed) Vehicular navigation system, its location and path planning function realize at mobile unit that all another kind of is center decision formula navigational system, and its some function need just can be finished by communication network.The research of western developed country Vehicular navigation system early, technology is more advanced, all there is product to introduce to the market, Japan particularly, self-aid navigation terminal market degree is quite high, and to have set up with the dynamic route inducible system be UTMS (general traffic control system) system of core, and also only limit to the self-aid navigation end product on the China market, and technology is perfect inadequately, and market-oriented degree is low, and the navigation terminal of center decision formula also occurs without any product.

At present external self-aid navigation terminal is mainly by navigational computer, positioning system, memory device and display device are formed, memory device is used to store map of navigation electronic, navigational computer is mainly finished path planning, driving instruction calculates, the demonstration of map and refreshing and function such as locating information processing, what path planning adopted is static path planning, usually the shortest with the path of cooking up is prerequisite, at first be to propose navigation requests during work by the user, as on touch-screen, indicating navigation starting point and terminating point, cook up optimal path by navigational computer according to the shortest path criterion then, the real-time positioning information of positioning system output and the path of cooking up are carried out producing key instruction after the map match, realize route guidance vehicle.The navigation terminal shortcoming of autonomous type is that the computing power of navigational computer is restricted, path planning algorithm is too simplified, and the path of cooking up is static shortest path, not in conjunction with Real-time Traffic Information, so practicality is relatively poor, and terminal must store map, and map can occupy very big storage space.And at present external center type navigation terminal has just increased communications portion on forming, the path planning function is finished according to Real-time Traffic Information in the center, send instruction to terminal by communication medium then, then to the vehicle channeling conduct, center type dynamic route inducible system as Japan adopts short distance infrared beacon net as the communication medium of vehicle to the roadside, infrared beacon links to each other with central host equipment by wire cable, the driving instruction of vehicle is to calculate from the data that the roadside infrared beacon receives, so just require the roadside to set up a large amount of infrared beacons, and the infrared beacon comunication area is limited, and the expense of installation and maintenance is very high, actual conditions from present China, it is infeasible setting up large-scale infrared beacon net, and we must consider to utilize existing communication network resource to come the realization system as far as possible.

The utility model content

Technology of the present utility model is dealt with problems and is: overcome shortcomings such as autonomous type terminal real-time is poor, poor practicability, adopt GPRS network to carry out the navigation instruction data transmission, rather than undertaken by infrared beacon, terminal does not need storing electronic map, terminal utilizes perfect order set to finish the guiding work of vehicle, and terminal adopts the design of LCD control panel independence external, simple installation, volume is little, has taken into full account user's practicality and security.

Technical solution of the present utility model is: intelligent vehicle-carried information terminal, its characteristics are: mainly be made up of core circuit and peripheral circuit two large divisions, core circuit comprises the flush bonding processor module, mainly comprise embedded type CPU, FLASH storer, SDRAM storer, the SDRAM storer is connected with embedded type CPU is two-way respectively with the FLASH storer; Peripheral circuit comprises the GPS locating module, the GPRS communication module, the LCD display module, voice module, energy supply control module and expansion connection module, processor module mainly comprises embedded central processing unit, SDRAM storer and FLASH storer, processor module CPU links to each other with each module of peripheral circuit by the SODIM144 interface, wherein CPU serial ports links to each other with the GPRS module by the SODIM144 interface, reception is from the information point instruction at center, another serial ports of CPU string is extended to 3 sub-serial ports by the serial ports expansion chip (SP2339) of expansion connection module: one of them links to each other with the GPS locating module, receives the locating information of GPS locating module output; Another links to each other with speech chip in the voice module, sends voice messaging to voice module vehicle is carried out voice guide, and the LCD display module is made up of LCD display interface and touch screen controller, can link to each other with external display board by 32 needle interfaces.

Described flush bonding processor module and peripheral module adopt the separate type design.Can isolate the interference of peripheral circuit on the one hand, improve operational reliability processor circuit; Consider from function expansion and cost on the other hand, because peripheral board adopts the dual platen design, do not requiring under the situation that changes core circuit, directly peripheral circuit is upgraded, just can realize function expansion and Product Renewal, and cost is lower, in addition, terminal is reserved with complete debugging interface, all can independently debug for the each several part module.

Principle of work of the present utility model is: the utility model comprises the order set of a uniqueness, instructs according to information point and carries out corresponding operating.Information point has various ways.For position type information point, be meant a position of describing by coordinate and its effective range.Position type information point command information comprises coordinate, effective range, trigger action type, the information content and the operation moment etc.Order set is according to the instruction of the various forms of information points of instruction type code identification, and when trigger condition that information point comprised satisfied, this instruction was triggered, and institute's corresponding instruction content is carried out according to the action type of instruction regulation.Information collection message point instruction for the position type, the ultimate principle of carrying out this instruction is as follows: when this car coordinate of the output of the GPS module on the car-mounted terminal entered the coordinate effective range of certain information collection message point in the storer, the triggering requirement of carrying out was satisfied in this information collection message point instruction.Central processor CPU will be being the action type of appointment to center transmission information, with this car status information, comprise the content of operation of information such as current coordinate, this vehicle speed, direction, finish this instruction manipulation, thereby finish the information acquisition task as this information point correspondence.As carry out dynamic route and induce, information acquisition and information service can be finished under corresponding instruction.

The utility model compared with prior art has following advantage mutually:

(1) terminal does not need storing electronic map, utilizes the guiding of the order set realization vehicle of terminal;

(2) path planning does not carry out in terminal, both can reduce the calculated amount of terminal, can carry out dynamic route planning in conjunction with Real-time Traffic Information again;

(3) terminal adopts the design of LCD control panel independence external, simple installation, and volume is little;

(4) terminal has the ability of communicating by letter with the center, utilizes GPRS network to carry out the transmission of information point instruction;

(5) terminal adopts processor module and the design of peripheral module separate type, can isolate the interference of peripheral circuit to processor circuit, improves the processor module operational reliability.

In a word, domestic present self-aid navigation terminal poor practicability, can not really embody the superiority of navigation, and because the restriction of communication network, can not indiscriminately imitate external Terminal Design, the utility model utilizes existing communication network to realize the navigation terminal of center type, has finished the navigation mode of center type.

Description of drawings

Fig. 1 is a composition structural representation of the present utility model;

Fig. 2 is a GPS module among Fig. 1;

Fig. 3 is a GPRS module among Fig. 1;

Fig. 4 is an expansion connection module among Fig. 1.

Embodiment

As shown in Figure 1, mainly form by core circuit and peripheral circuit two large divisions, core circuit is the flush bonding processor module, and it mainly comprises embedded type CPU, FLASH storer, SDRAM storer, and the SDRAM storer is connected with embedded type CPU is two-way respectively with the FLASH storer; Peripheral circuit comprises GPS locating module, GPRS communication module, LCD display module, voice module, energy supply control module and expansion connection module.Principle of work is as follows: the GPS module links to each other with CPU serial ports in the processor module by expansion connection module, and export locating information in real time, CPU is after receiving locating information, carry out real-time resolving, trigger judgement according to order set then, as meet trigger condition, then trigger corresponding operating, can can export to the chipspeech of voice module simultaneously as required with form output order information on the external LCD display of literal, produce information of voice prompt; The GPRS module is the communication interface at terminal and center, can receive the information point director data from the center, sends CPU to by serial ports 1, extracts data by CPU, finishes corresponding operating, as the operation of information point database update etc.

Flush bonding processor module and the design of peripheral module separate type are implemented as follows: processor module, be that core circuit plate and peripheral circuit plate adopt independently two circuit boards, the core circuit plate is considered requirements such as volume and high frequency be anti-interference, the design of employing multilayer board, utilize the PCB design tool of Cadence series to finish during design, and peripheral circuit is considered from aspects such as costs, adopts the doubling plate design during design.On peripheral circuit board, be provided with the SODIMM144 interface slot, according to actual needs the relevant pin of core board circuit board CPU is guided to the SODIMM interface, comprising resetting, power supply, ground, the LCD control interface, USB interface, the touch screen controller interface, asynchronous serial port, and I2C interface, common IO mouth and external interrupt interface or the like, during work, only core circuit plate SODIMM interface need be inserted in the slot, realizing that core board is connected with peripheral circuit gets final product, wherein core circuit plate working power is provided by peripheral circuit, and reset circuit also realizes in peripheral circuit, but the CPU work clock is produced by the core board internal circuit.

Embedded type CPU is selected the MC9328MXL chip of motorola inc for use, this processor has the ARM920T micro-processor kernel of high-performance, low-power consumption, travelling speed can be up to 200MHz, integrated functional modules such as lcd controller, SRAM, USB controller, analog to digital converter and MMC/SD console controller can realize the multimedia application of designed product.

The SDRAM storer is selected the MT48LC16M16A2SDRAM chip of Micron company, and memory capacity is 16M * 16bit, and two of employings and the parallel bus technology that connects can realize the requirement of the SDRAM storage space of 64Mbyte in connections.

The FLASH storer is selected the E28F128J3A-150 chip of Intel Company for use, adopts two 8Mbyte during connection and connects, and capacity can reach 16M, and data-bus width is 32, can realize high speed data transfer.

As shown in Figure 2, GPS module receiver GSU36 is connected to terminal by 9 needle interfaces, and wherein 7 pin of J10 are GPS real-time positioning information output pin, links to each other with 6 pin of serial ports expansion chip SP2339; 6 pin are that GPS receiver initiation parameter is provided with pin, can carry out the initialization setting to receiver by this pin, and 8 pin are receiver power supply pin, and voltage is 3.3v.

As shown in Figure 3, the GPRS module adopts the WISMO2D module of WAVECOM company, and the WISMO2D32 pin is the data output pin, the command information that can output center passes down, and this pin links to each other with 113 pin of SODIMM144 interface; 39 pin are input pin, can receive the steering order information of CPU, and this pin links to each other with 109 pin of SODIMM144 interface, and the module operating voltage is 3.3V, is provided by energy supply control module.The principle of work of GPRS module is as follows: CPU sends AT dialing instruction to module, activates through ppp protocol, after authentication and the IP address assignment, has just finished dialing procedure, has set up and being connected of center, and terminal just can carry out data communication with the center.

As shown in Figure 4, the serial ports expansion chip of serial ports expansion module adopts Chengdu to look the SP2339 chip of general scientific ﹠ technical corporation, and (SP2339 is consistent with the SP2338 pinout,), its main serial ports directly links to each other with the SODIMM144 interface, 12 pin are main serial ports output pin, link to each other with 114 pin of SODIMM144,13 pin are main serial ports input pin, link to each other with 110 pin of SODIMM144, three sub-serial ports have only been used wherein two, and one links to each other with the GPS interface module, one links to each other with the speech chip OSYNO6188 of voice module, another is standby, and wherein 6 pin are substring mouth 0 input pin, links to each other with the output pin of GPS receiver, 7 pin are substring mouth 0 output pin, link to each other with the input pin of GPS receiver, 8 pin are substring mouth 1 input pin, link to each other with the output pin (17 pin) of speech chip, 9 pin are substring mouth 1 output pin, link to each other with the input pin (18) of speech chip, chip operating voltage is 3.3V, is provided by energy supply control module.Principle of work is as follows: the serial ports expansion chip receives the data from each substring mouth simultaneously, by main serial ports output, CPU differentiates the source of data according to the OPADD of serial ports expansion chip, receive respectively then, give substring mouth 0 as GPS receiver output locating information, chip will produce corresponding output at main serial ports, after CPU receives data, differentiate according to order set, export information of voice prompt if desired, then be transferred to main serial ports earlier, the address that serial ports will be set simultaneously is a substring mouth 1, and data will be exported to speech chip by substring mouth 1 like this, speech chip will be exported synthetic speech, simultaneously echo message is returned to the serial ports expansion chip, thereby send CPU serial ports 2 to, so that CPU carries out corresponding control by main serial ports.

The LCD display module is made up of chromatic liquid crystal screen (320 * 240, have touch screen function) and touch-screen control chip, when the user is carried out route guidance and voice suggestion, will show relevant guiding Word message on liquid crystal display; The user can carry out corresponding operating by touch-screen, can carry out the personalized service information management.The touch-screen model that this terminal adopts is LQ035Q7DB02, and the touch-screen control chip is ADS7843E.

The 12V power supply of car-mounted terminal is adopted in the entire circuit power supply, by energy supply control module conversion back output 5V and 3.3V voltage, maximum load power is 15W, system provides power supply for whole terminal, the primary power modular converter adopts the SF12S05-15W of BCT, with the 12V voltage transitions is 5V output, again by LM1085 conversion output 3.3V power supply.

Voice module mainly is made up of chipspeech and speech interface, and major function is exactly under the control of processor, and the Word message of processor being sent by asynchronous serial port is converted to voice messaging, goes out by the device plays of raising one's voice that links to each other with speech interface.What speech chip adopted is the OSYNO6188 speech chip of the grand company of letter news, has the PWM way of output and outer order and props up triode driving loudspeaker dual mode.

Claims

1, intelligent vehicle-carried information terminal, it is characterized in that: mainly form by core circuit and peripheral circuit two large divisions, core circuit is the flush bonding processor module, mainly comprise embedded type CPU, FLASH storer, SDRAM storer, the SDRAM storer is connected with embedded type CPU is two-way respectively with the FLASH storer; Peripheral circuit comprises the GPS locating module, the GPRS communication module, the LCD display module, voice module, energy supply control module and expansion connection module, the flush bonding processor module is connected with each module of above-mentioned peripheral circuit by the SODIMM interface, LCD module wherein, energy supply control module, GPRS module and expansion connection module directly utilize the SODIMM interface to link to each other with embedding worker CPU in the embedded processing module, and the chipspeech in GPS locating module and the voice module only is connected with serial ports expansion chip in the expansion connection module, be connected on the serial ports of embedded type CPU by the serial ports expansion chip then, the GPRS communication module directly links to each other with another serial ports of embedded type CPU.

2, intelligent vehicle-carried information terminal according to claim 1 is characterized in that: described flush bonding processor module and peripheral module design for separate type.