CN100473950C - Vehicular satellite-positioning and navigation system - Google Patents

Abstract

The invention refers to a kind of car satellite localization and navigating system which combines the functions of satellite localization, electron map navigation, and intelligent burglar-resisting monitoring. The device includes: the host computer, GPS antenna, RF signal line connected to the car CD, the centre processor on the host computer is TMLH918 main control CPU, the software includes: heaven navigation operation system for external devices management and displaying platform management; a file manager for navigation; a fuzzing mathematics system and the self-debugging system, it uses isomorphic mapping method and black theory to calculate; it combines intelligent identification and fuzzing identification, the isomorphic mapping theory is combined with the discrete mathematics, and corrects and identifies the current channel; it uses Chinese character text and voice reading system; the CD HOST of TMLH918 upgrades the CD to VCD. The host computer of the invention is strong; it is special to the navigation and electron map process.

Description

Vehicle-mounted satnav and navigational system

Technical field

The present invention relates to a kind of onboard navigation system, especially a kind ofly collect that satnav, navigation of electronic map, intelligent sound navigate and the intelligent anti-theft monitoring is the vehicle-mounted satnav and the navigational system of one.

Background technology

At present, the GPS navigation industry develops rapidly, product technology improves constantly, application number is that the patent application of 01144744 (publication number: CN 1428596 A) discloses a kind of vehicle-mounted satellite navigation system, the hardware components of this invention comprises: main frame and the gps antenna that is connected with main frame respectively, inertial navigation set, speedometer, telepilot, CD player, host machine part comprises a CPU (central processing unit) (CPU) and a GPS module that is connected with CPU (central processing unit) respectively, the multimedia controller of a store map data (MMC) card, one dynamic RAM (SDRAM), one USBHOST controller,-program storage, one data-carrier store, one display, one infrared port has a loudspeaker to be connected with CPU (central processing unit) by chip of speech decoder in addition; One inertial navigation set/gsm module is connected with CPU (central processing unit).This invention adopts embedded software to develop, utilization is based on the digital map database of MMC storage card and CDROM, in conjunction with GPS location technology and angular velocity and speed dead reckoning technology, by map matching technology and path planning, bootstrap algorithm is presented at current vehicle location and destination locations on the electronic chart with the icon form.Aspect information retrieval, adopted directly search, classification searching and search three kinds by radius and search mode, on input mode, adopting the phonetic method is input form.

The subject matter of existing vehicle electronics digital map navigation product is that cost is too high, can not accept to reach product for ordinary consumer and popularize.Foregoing invention does not propose effective solution at the cost problem of navigation product, the CD player of this invention is the peripheral input-output device of a kind of standard with this navigational system compatibility, rather than existing C D machine in the automobile upgraded to be improved to navigational system used, do not give full play to the function of first wife's equipment, cause the fund waste; The information retrieval method of this invention has higher requirements to the travelling speed of hardware in addition, is unfavorable for the economize on hardware cost, makes the entire product ratio of performance to price not ideal enough, is unsuitable for participating in market competition.In addition, this product function still has limitation, does not have fully to develop the potential function of navigator, has reduced its product practicality.

Summary of the invention

The purpose of this invention is to provide a kind of can be with existing hoot device---vehicle-mounted CD upgrades to vehicle-mounted VCD, the onboard navigation system shared with map of navigation electronic;

Another object of the present invention provides a navigation operation system, directly towards navigation features, forms a navigation operation platform fast and quickly and easily, and the operation hardware environment is simple, with low cost and can accomplish efficient computing;

Another object of the present invention provide a kind of rapidly and efficiently and the information retrieval method of economize on hardware cost;

Another object of the present invention provides a kind of navigational system that possesses anti-theft feature;

Another object of the present invention provides a kind of navigational system that is provided with intelligent pop-up ad form;

Another object of the present invention provides a kind of navigational system that realizes linking between vehicle and the vehicle communication.

The objective of the invention is to be achieved through the following technical solutions:

The present invention includes: main frame, gps antenna and the RF signal wire that links to each other with vehicle-mounted CD, the central processing unit of main frame is the TMLH918 master cpu, TMLH918 master cpu motherboard comprises:

32 RISC multimedia chips of TMLH918 single-chip;

A slice EPROM memory links to each other with TMLH918;

A slice or two 64MBSDRAM memories are connected with TMLH918;

A slice DSP digital processing unit is connected with TMLH918;

NAND FLASH cartoon crosses connector and TMLH918 connects;

A speech processor links to each other with TMLH918;

A GPS module links to each other with TMLH918;

An auxiliary MCU links to each other with TMLH918;

A touch-screen A/D input links to each other with TMLH918;

A video DAC chip links to each other with TMLH918.

Software design of the present invention comprises following content:

Operating system of the present invention is engaged in the management of peripheral equipment management and display platform, and the electronic chart demonstration amounts to and divides 18 layers, by tree-shaped principle they is coupled together, at different condition commander their continuous loading and unloading;

Software feature of the present invention is, sets up one and aims at the used file manager of navigation, comprises tree-shaped principle " arteriovenous " commander in the structure of its FAT table and passes structure, linking relationship structure, wears a layer structure;

Software feature of the present invention is to set up a fuzzy mathematics arithmetic system and from the error correction system, adopt isomorphic mapping and " blackboard " theory to carry out computing;

Software feature of the present invention is, adopts Intelligent Recognition to combine with fuzzy diagnosis, and the isomorphism principle combines with discrete data, and current road is accurately discerned and revised;

Software feature of the present invention is that employing Chinese-character text voice read-out system not only can be read some driving statements commonly used, and can accurately read link name, place name and the significant objective that any Chinese text is named;

Software feature of the present invention is that the CD HOST function of TMLH918 inside escalates into VCD with the CD in the existing automobile;

Software feature of the present invention is, when vehicle occurs when stolen, navigational system discern automatically present automobile position and place road and near situation, whether travel, direction is as automobile operating state how, directly be sent to the people of car owner or appointment, so that in time report to the police and find stolen vehicle; If the driving driver on the way runs into accident need cry for help the time, click emergency by strong, just can tell the people of car owner or appointment, to take the relief measure with automobile present circumstances and particular location;

Another characteristics of software of the present invention are to adopt forced stack algorithm, calculate optimal path, by the fastest, recently, the most fuel-efficient three kinds of modes find traffic route, and according to the highway section of travelling when front truck, real-time voice is reminded driver's junction ahead, and, on display screen, demonstrate the line alignment of optimal path simultaneously with special color to which kind of travels down; If the user has departed from the course line of appointment, these software systems will calculate the optimal path that is suitable for when the front truck position automatically;

Another characteristics of software of the present invention are, introduce the company information column, utilize the driving positioning function, near the enterprise of the information content or the company introduce and the content at sight spot of having, ordering ground is presented at status line or directly shows in form, and while term pronunciation goes out its content.

Considered man-machine interface in this software design fully, menu is simple and direct and directly perceived, can operate by modes such as button mouse, touch-screen and telepilots.

The present invention makes full use of existing hoot device---vehicle-mounted CD, it is upgraded to vehicle-mounted VCD, shared with map of navigation electronic, it is low-cost to form a cover, and audiovisual entertainment and vehicle-mounted satnav and electronic chart, voice navigate and are the vehicle mounted guidance product of one in the collection car.The present invention adopts TMLH918 type single-chip CPU processor, it is equivalent to present common used in industry PC or multimedia PC plate is condensed into a single-chip, the irrelevant redundancy function of deleting simultaneously and navigate, inside has increased the mpeg decode unit, has merged the multi-functional hardware cell of single-chip of central processing unit, high-speed bus coprocessor, decoder video coding and output of one.Not only powerful, handle at navigation and electronic chart specially, and the cost performance of hardware is best, has very strong price competitiveness compared with similar products.The present invention adopts tree-shaped theory structure and file name area point-score combination FAT table and link to handle, its feature is to utilize to show " face " with " point ", core point is caught, thereby the netted circuit that proposition is associated with it, this data structure is less demanding to the hardware travelling speed, therefore saved hardware cost, and its seek rate can reach the requirement of real-time navigation.Owing to adopt this special construction, according to measuring and calculating, on the MAPINFO electronic map platform, carry out map datum onesize, same information with PC, this structure almost be it more than 12 times.That is to say that when moving onesize electronic chart and information, it is the same with the effect of the TMLH918 that only adopts the 100MHz dominant frequency that PC needs the 1.2Hz dominant frequency, thereby has reduced the cost of CPU; Therefore the present invention is in data structure and read and be more suitable in the cost that reduces navigation product aspect the data.

The drawing explanation

Below in conjunction with drawings and Examples the present invention is described in further detail.

Fig. 1 is the present invention's system hardware structure figure;

Fig. 2 is the present invention's TMLH918 motherboard cut-away view;

Fig. 3 is system's main circuit principle sketch of the present invention;

Fig. 4 is the present invention's major function realization flow figure;

Fig. 5 combines workflow diagram for the present invention's car phone with alarm;

Fig. 6 realizes stolen vehicle tracking synoptic diagram for the present invention's the vehicle linking functions that utilizes;

Fig. 7 is the present invention's figure layer link schematic diagram;

Fig. 8 adopts reflection method and the theoretical synoptic diagram of blackboard for the present invention's map datum computing.

Embodiment

As shown in Figure 1, hardware of the present invention comprises the input port composition of main frame, GPS reception, map datum card, display video output, voice output, GSM input port and telepilot, controller, keyboard, mouse, touch-screen, alarm.It is to be that core links to each other with them respectively with the TMLH918 CPU (central processing unit).Main frame adopts this form, at had in the former car VCD or DVD and with display screen carry out video switch, can realize collecting the system that VCD or DVD have the auto navigation function simultaneously that plays.

As shown in Figure 2, motherboard inner structure of the present invention is a core processing unit with 32 RISC TMLH918, is engaged in the management of peripheral equipment management and display platform, realizes all functions.27C020/27C040 is the bios program memory of TMLH918, at first carry out this memory under program after system's energising, its major function is to be responsible for its peripheral hardware and file operation management, be responsible for needed file is called in the SDRAM sound attitude memory, by it to program in the outside data card and data, on demand, loading or unloading constantly, move the program of difference in functionality, to realize difference in functionality.This algorithm not only efficient is high but also less demanding to hardware environment, can reduce cost of products widely, lays a good foundation for product has very strong competitive power in market competition.The fundamental purpose of 32 bit DSP digital processing units is: become the PCM data stream to give TMLH918 the RF signal operation of outside CD, utilize the CD host functional block of TMLH918 inside, these data stream are handled, to realize that the CD of former car is become VCD, can first wife CD not removed, and cause the fund waste, give full play to first wife's functions of the equipments because having adorned navigational system, make the ratio of performance to price of entire product best, this is a unexistent function at present domestic and international all navigation products.The video processor of TMLH918 inside becomes normal video output or VGA signal through video coding chip.When if desired current road conditions being read by voice, after the TMLH918 computing, control speech processor output voice, the present invention adopts the Chinese-character text voice read-out system, not only can read some driving statements commonly used, and can accurately read link name, place name and the significant objective that any Chinese text is named.Realize that veritably the driver need not see electronic curtain, only listen just to know oneself travels at present on which bar road with ear, how many rice of the place ahead have a crossing, what what road, the right, road, the left side, near be which place or ground or or the like all contents in the map.Can give full play to the function of voice system like this, can not take sb's mind off sth, thereby cause unnecessary traffic hazard because of the driver watches electronic chart sometimes.Gsm module and alarm module are handled CPU through serial line interface with association and are connected.

Referring to Fig. 3, be the schematic diagram of navigational system circuit,

Central processing unit model a: TMLH918 (host CPU);

An association handles MCU and adopts MB89935;

A GPS module is used for receiving satellite signal, for system provides gps data, is used for determining the automobile position that it is to link to each other with TMLH918 by serial ports 1;

An EPROM memory under program 27C020 (or 27C040) links to each other with TMLH918, and the Basic Input or Output System (BIOS) of system program is provided for TMLH918;

64MB or 128M BSDRAM link to each other with TMLH918, are used for data-storing and program run;

One 32 bit DSP digital processing unit adopts the CXD3068 chip, is used for CD RF digital signal processing;

A video coding chip converts the TMLH918 video signal to normal video output;

A gsm module links to each other with MB89935 by serial port, transmits antitheft information mutually;

One four line touch-screen links to each other with TMLH918 by the A/D conversion;

Keyboard, mouse, controller link to each other with MB89935 by serial communication;

One links to each other with TMLH918 through the external remote control input port, receives from external remote signal, carries out feature operation.

Fig. 4 is a main process flow diagram of realizing this product function

Begin to enter navigational system and start initialize routine, its major function is to detect each external equipment abnormal occurrence whether to occur, occurs then showing its error message unusually if external equipment detects, if all are normal, then begins the pilot operationp system.

When reading last the shutdown, the present state of native system, determine whether to be in navigational state, then carry out CD host function if not being in navigational state, if the CD of this moment on the car is in progress to be the CD video disc, then its data are directly changed into audio signal output, if in progress be the VCD video disc, then its data are decoded, respectively outputting video signal and sound signal.

When being in navigational state, system begins to read FAT table and the related data in the electric board, enters the real-time positioning state, its function is referring to process flow diagram among Fig. 4, when extraneous button (from wireless remote control, mouse, touch-screen etc.), execute corresponding function after, return the real-time navigation state.

Fig. 5 is car phone and alarm workflow diagram

This function is that the user can utilize car that the mobile phone of oneself checks oneself where, the stolen vehicle situation of also can making a phone call to monitor.Stolen or press emergency during key because of emergency condition driving driver when automobile, this navigational system starts warning function automatically, calculating present automobile position simultaneously reaches on what road or near so-and-so, whether travel, direction is as automobile operating state how, and this information is sent to the mobile phone of navigational system appointment, the car owner will soon know the situation of own automobile, so that in time report to the police and find oneself automobile, to realize anti-theft feature.When the driving driver on the way runs into accident and need cry for help, need not make a phone call, only click emergency by strong, just can tell the people of car owner or appointment with automobile present circumstances and particular location, ensured traffic safety so widely.

Fig. 6 utilizes the distinctive vehicle linking functions of this navigational system synoptic diagram, its fundamental purpose is to find the position of stolen vehicle as soon as possible with another automobile, realize following the tracks of another automobile, accomplish no center commander's intelligent anti-theft feature veritably with an automobile.

As shown in Figure 7, the present invention sets up one and aims at the used file manager of navigation, comprise tree-shaped principle " arteriovenous " commander in the structure of its FAT table and pass structure, linking relationship structure, wear a layer structure, when a certain content of inquiry, can efficiently and apace find object content.The electronic chart demonstration amounts to and divides 18 layers, every layer is equivalent to an assorted cold dish, form by many little maps merging, this navigational system adopts the tree structure principle that they are coupled together, relation can be found fast through tree-shaped relation between each figure, at different condition commander their continuous loading and unloading, so just be easy to realize the multistage amplification of map vector and dwindle, and make the manufacturing process of map become simpler.This algorithm not only efficient is high but also less demanding to hardware environment, can reduce the cost of product widely, lays a good foundation for product has very strong competitive power in market competition.

Fig. 8 is that this navigational system adopts reflection method and the theoretical synoptic diagram of blackboard, the present invention adopts isomorphic mapping and " blackboard " theory to carry out computing, with huge data after mapping reassembles into, in internal memory, form a form (x, y) the little map datum in the scope, CPU is in calculating process, all computings are not at entire database, do not need all data in the map are carried out computing, and only computing (x, y) interior data, can make the work efficiency of CPU improve tens times like this, even tens times, reduced the requirement of navigational system widely to frequency of operation, therefore, when these software systems are moved, can reach the higher PC operational effect of cost on low-cost CPU in the same old way.Thereby for the hardware cost that reduces navigational system has been laid the basis of essence.Concrete grammar is, utilizes fuzzy algorithm to determine suitable engineer's scale and form position, with after the map datum intercepting, deposits in the mapping table in the internal memory again, and navigational system need only be monitored its form and just move and can realize computing fast and efficiently.

The present invention has set up a fuzzy mathematics arithmetic system and from the error correction system, has adopted Intelligent Recognition to combine with fuzzy diagnosis, and the isomorphism principle combines with discrete data.Current road is accurately discerned and revised, can reduce the requirement of map of navigation electronic widely like this to precision, the electronic cartography expense of whole navigational system is reduced widely, thereby reduced the huge input of whole navigational system on electronic cartography, like this, the threshold of navigation product just can reduce widely, and full out popularizing in China even the world for navigation product provides a new thinking.

Considered man-machine interface in the software design of the present invention fully, menu is simple and direct and directly perceived, can operate by modes such as button mouse, touch-screen and telepilots.

The present invention adopts forced stack algorithm, calculate optimal path, by the fastest, recently, the most fuel-efficient three kinds of modes find traffic route, and according to the highway section of travelling when front truck, real-time voice is reminded driver's junction ahead, and, on display screen, demonstrate the line alignment of optimal path simultaneously with special color to which kind of travels down; If with the course line of having departed from appointment, these software systems will calculate the optimal path that is suitable for when the front truck position automatically.

The present invention has introduced the company information column first, utilize the driving positioning function, with near the enterprise of the information content or the company introduce and the content at sight spot of having, be presented at status line or directly in form, show to ordering, and the term pronunciation goes out its content simultaneously, and the user does not need to enter this " door of enterprise " just can understand this enterprise's situation.Thereby navigational system can be combined developing navigational system new concept with the advertising message industry.

Claims (7)

1, a kind of vehicle-mounted satnav and navigational system, comprise: main frame, gps antenna, gps antenna is connected with main frame, it is characterized in that: also be provided with the RF signal wire that links to each other with vehicle-mounted CD, the central processing unit of main frame is the TMLH918 master cpu, and TMLH918 master cpu motherboard comprises:

32 RISC multimedia chips of TMLH918 single-chip;

A slice EPROM memory links to each other with TMLH918;

A slice or two 64MB SDRAM memories are connected with TMLH918;

A slice DSP digital processing unit is connected with TMLH918;

NAND FLASH cartoon crosses connector and TMLH918 connects;

A speech processor links to each other with TMLH918;

A GPS module links to each other with TMLH918;

An auxiliary MCU links to each other with TMLH918;

A touch-screen A/D input links to each other with TMLH918;

A video DAC chip links to each other with TMLH918;

Operating system adopts the tree structure principle and sets up one and aims at the used file manager of navigation, comprises tree-shaped principle " arteriovenous " commander in the structure of its FAT table and passes structure, linking relationship structure, wears a layer structure; The electronic chart layering shows, every layer of map merged by many little maps and forms, and relation can be found fast through tree-shaped relation between each figure, command their continuous loading and unloading at different condition, realizing the quick multistage amplification of map vector and to dwindle, and simplify map manufacturing process.

2, a kind of vehicle-mounted satnav according to claim 1 and navigational system is characterized in that: described GPS module links to each other with TMLH918 by serial ports 1.

3, a kind of vehicle-mounted satnav according to claim 1 and navigational system is characterized in that: described auxiliary MCU adopts MB89935.

4, a kind of vehicle-mounted satnav according to claim 3 and navigational system, it is characterized in that: a gsm module links to each other with MB89935 by serial port, and keyboard, mouse, controller link to each other with MB89935 by serial communication.

5, a kind of vehicle-mounted satnav according to claim 1 and navigational system, it is characterized in that: described EPROM memory under program is 27C020 or 27C040.

6, a kind of vehicle-mounted satnav according to claim 1 and navigational system is characterized in that: described DSP digital processing unit is 32 bit DSP digital processing units, adopts the CXD3068 chip.

7, a kind of vehicle-mounted satnav according to claim 1 and navigational system is characterized in that: described electronic chart amounts to and divides 18 layers of demonstration.

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