CN108045332A - A kind of Big Dipper is compatible with board information terminal - Google Patents
A kind of Big Dipper is compatible with board information terminal Download PDFInfo
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- CN108045332A CN108045332A CN201711353600.6A CN201711353600A CN108045332A CN 108045332 A CN108045332 A CN 108045332A CN 201711353600 A CN201711353600 A CN 201711353600A CN 108045332 A CN108045332 A CN 108045332A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/421—Determining position by combining or switching between position solutions or signals derived from different satellite radio beacon positioning systems; by combining or switching between position solutions or signals derived from different modes of operation in a single system
- G01S19/425—Determining position by combining or switching between position solutions or signals derived from different satellite radio beacon positioning systems; by combining or switching between position solutions or signals derived from different modes of operation in a single system by combining or switching between signals derived from different satellite radio beacon positioning systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/802—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for monitoring and displaying vehicle exterior blind spot views
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/8066—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for monitoring rearward traffic
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Abstract
The present invention proposes a kind of Big Dipper compatibility board information terminal, including USB interface, SD card interface, battery unit, SIM card, IC card unit, GPRS antenna, radio antenna and BD, the GPS antenna being connected respectively with main power board, the loudspeaker being connected respectively with display screen driving plate, touch control unit, liquid crystal display, utilizing camera interface, AUX interfaces and button, button switch；The main power board is connected by data/address bus with display screen driving plate, and main power board provides driving power for display screen driving plate.The integrated Tachographs function of the present invention, audio-visual amusement function, video display function, CAN lines signal analysis function, navigation feature, reversing radar function, backup camera video is shown and blind area display function, current block design philosophy finally can be met according to functional requirement and user's application conditions selective enabling each unit.
Description
Technical field
The present invention relates to a kind of Big Dippeves to be compatible with board information terminal.
Background technology
With the fast development of China's automobile industry, the judicial departments such as Ministry of Communications, Ministry of Public Security progressively strengthen road traffic peace
The relevant legislation travelled entirely.Tractor truck, gross mass are more than 12 tons before national standard GB 7258-2012 require on March in 2013 1
Load-carrying vehicle the Tachographs with positioner should be installed.Road transport vehicle dynamic supervisory management method 2014-5 commands
It is distinctly claimed, " two visitors one endanger " vehicle and heavy motor truck and tractor truck entrucking mounted terminal before vehicle release, and connects
Enter national freight monitoring platform.Meanwhile the promulgation specification of the relevant criterions such as national standard GB/T 19056, GB/T 808, GB/T 794
Data transmission and memory mechanism so that the device has versatility and market prospects are extensive.
With the development of Beidou navigation positioning system, Beidou navigation application will welcome " scale, society
The great historic opportunities of change, industrialization, internationalization ", and in BD/GPS multi-mode baseband chip solutions, satellite navigation is special
ASIC hardware combines " China Chip " that domestic application processor has created a real meaning.The application processor is domestic complete
The CPU/DSP cores of full independent development, including the software tools such as instruction set, compiler chain and all key technologies, possess
100% Chinese independent intellectual property right.It possesses the multiline procedure processor framework of the leading level in the world, can share many hardware moneys
Source, and while suitable polycaryon processor processing capacity is provided, save chip cost.And it is led based on the domestic processor satellite
The module for chip solution of navigating is the BD/GPS bimodulus modules of global volume minimum, has that positioning accuracy is high, starts the time soon and work(
Consume the features such as low.
The rapid development of microelectric technique, Digital Signal Processing in recent years, in processing speed, operational precision, processing
All various aspects such as device structure, instruction system, instruction flow are all greatly improved, and rapidly voice, radar, sonar, earthquake,
The various fields such as image, communication system, system control, fault detect are extremely widely applied.Full-vehicle control technology into
Vehicle intelligence, comfortableization requirement is continuously improved in step and driver and conductor, it is desirable that vehicle electronics has fault real-time diagnosis information
Display and associated monitoring information upload high in the clouds in real time and auxiliary drives function；And carload instrument platform is suitble to driver and conductor to observe and grasp
The space layout of work is limited, needs finished vehicle electronic highly-integrated functions, and multifunction is shielded in volume miniaturization.
The content of the invention
The present invention proposes a kind of Big Dipper compatibility board information terminal, highly integrated functional independence configurationization smart electronics system
System is a kind of Big Dipper compatibility board information terminal.
The technical proposal of the invention is realized in this way：
A kind of Big Dipper is compatible with board information terminal, including USB interface, SD card interface, the electricity being connected respectively with main power board
Pool unit, SIM card, IC card unit, GPRS antenna, radio antenna and BD, GPS antenna, are connected respectively with display screen driving plate
Loudspeaker, touch control unit, liquid crystal display, utilizing camera interface, AUX interfaces and button, button switch；The main power board passes through
Data/address bus is connected with display screen driving plate, and main power board provides driving power for display screen driving plate.
Preferably, the main power board include be connected respectively with MCU reset circuit, crystal oscillating circuit, ferroelectric memory circuit,
CAN communication circuit, internal screen telecommunication circuit, gsm communication process circuit, Big Dipper positioning circuit, signal acquisition processing circuit, radio reception
Drive circuit, IC card identification circuit, audio frequency processing circuit, R232 telecommunication circuits, 3 axis gyroscope blocks and USB, SD communication
Circuit；The MCU is also respectively connected with multi-stage power source process circuit and built-in power, and the multi-stage power source process circuit connects respectively
Mains input detection circuit and power output circuit；
The display screen driving plate include be connected respectively with CPU reset circuit, crystal oscillating circuit, EMMC storage circuits,
DDR4 main memory circuits, internal screen telecommunication circuit, liquid crystal display, liquid crystal display drive circuit, touch-control circuit, 4 road video processing
Circuit, video cut circuit, USB, SD telecommunication circuit, R232 telecommunication circuits, driving voicefrequency circuit, keystroke handling circuit；It is described
CPU is also connected with mains input detection circuit and steering engine power supply processing circuit, and the mains input detection circuit connects real-time clock
Unit, the real time clock unit connect onboard clock power supply, and the onboard clock power supply connects CPU；The liquid crystal display is driven
Dynamic circuit connection liquid crystal display；4 tunnel video processing circuits connection video cuts circuit.
Preferably, the Big Dipper positioning circuit includes Beidou positioning information parsing data channel all the way, another way GPS positioning
Information parses data channel；Two paths of data parsing channel reception from BD, after GPS antenna signal after amplifier to the Big Dipper and
The respective demodulators of GPS and Base-Band Processing is transmit digital signal arithmetic unit after digital signal, by the DSP operation for being internally embedded formula
More star signal resolutions go out co-ordinate position information in cycle, are sent to the MCU on motherboard power supply plate by serial ports, provide whole system
Binary channels location information.
Preferably, after the gsm communication process circuit receiving channel connects duplexer to RF transceivers by GPRS antenna
Through Anti-aliasing Filter Circuits to analogue baseband processors circuit, under MCU control conditions through Analog Baseband process circuit inside
Digital baseband and process circuit are transferred to after ADC/DAC process circuits, control GPIO circuits and sound equipment GPIO processing of circuit,
Under MCU control conditions number letter is completed through digital base band processor circuit internal DSP operations unit, logic circuit processing and memory
Number parsing；Sendaisle is put by Analog Baseband process circuit unit connection smoothed filter circuit to RF transceivers through power simultaneously
Big circuit is after duplexer to GPRS antenna；External sound signal was connected to extremely simulation after speech processing circuit after inputting MIC
Baseband processing circuitry, voice signal were connected to loudspeaker after exporting voice driven circuit.
Preferably, the analog signal of the vision signal input processing circuit acquisition four-way CCD camera CH passage inputs is through anti-
Signal is sent into video dissection process circuit unit and is digitized processing after the processing of aliasing filter circuit；Digital signal that treated
It is transferred to video and cuts circuit progress video and cut and merge and carry out sharpening processing, send to CUP, shown most by liquid crystal display
Whole graphic interface.
Preferably, the multiple power supplies process circuit unit by DC24V process circuits, protection circuit, voltage detecting circuit,
Voltage self-testing circuit, 12V process circuits, 5V process circuits, 4.2V process circuits, battery unit, 3.3V process circuits, screen driving
Plate power-supply system form, DC24V process circuits, protection circuit, filter circuit to input power inlet wire filter, it is anti-reverse protection and
Voltage stabilizing processing is exported to voltage detecting circuit with to ensure that the reference power supply of input system is reliable, at overvoltage self-testing circuit to 12V
2 tunnel of reason circuit branch is exported to 5V process circuits and screen driving plate power system circuit；5V power supply processing circuits unit difference is defeated
Go out power supply to 4.2V process circuits, 3.3V process circuits and CAN circuit, URAT circuits, gsm communication process circuit, 3 axis gyros
Instrument circuit and external output circuit.
Preferably, the audio driven process circuit by audio signal input source, CPU element, audio modulating circuit unit,
Audio driven control circuit unit, 2 tunnels driving power amplifier unit, loudspeaker composition, the navigation that wherein audio signal input source includes carry
ShowUnit, SD card and USB storage audio file, radio unit, MIC units, AUXUnitAnd signal processing unit composition, audio
The navigation hint included of signal input sourcesUnit, SD card, USB CUP, decoded processing are connected to by respective peripheral circuit unit
After export to audio modulating circuit unit, audio signal that audio modulating circuit unit inputs it carry out stereo process export to
Signal transmission drives external loading loudspeaker to power amplifier unit is driven after audio drive circuitry carries out stereo process.
What the present invention generated has the beneficial effect that：The integrated Tachographs function of the present invention, audio-visual amusement function, video are shown
Function, CAN lines signal analysis function, navigation feature, reversing radar function, backup camera video is shown and blind area shows work(
Can, finally it can meet current block design philosophy according to functional requirement and user's application conditions selective enabling each unit.The party
The automobile travel recorder function that case is not only met the requirements, while improve the intelligence of vehicle and comfortableization level, Er Qiezeng
Many miscellaneous function auxiliary is added to drive operation, travel condition of vehicle can be diagnosed in time, improve the reliability in vehicle operational process
And security performance.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is principle of the invention block schematic illustration.
Fig. 2 is main power board schematic diagram of the present invention.
Fig. 3 is liquid crystal display screen drive board schematic diagram of the present invention.
Fig. 4 is Big Dipper positioning circuit schematic diagram of the present invention.
Fig. 5 is gsm communication process circuit schematic diagram of the present invention.
Fig. 6 is vision signal input processing circuit cell schematics of the present invention.
Fig. 7 is multiple power supplies process circuit schematic diagram of the present invention.
Fig. 8 is audio driven process circuit schematic diagram of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
A kind of Big Dipper compatibility board information terminal as shown in Figure 1, including USB interface, the SD being connected respectively with main power board
Card interface, battery unit, SIM card, IC card unit, GPRS antenna, radio antenna and BD, GPS antenna drive respectively with display screen
Loudspeaker, touch control unit, liquid crystal display, utilizing camera interface, AUX interfaces and button, the button switch that movable plate connects；The main electricity
Source plate is connected by data/address bus with display screen driving plate, and main power board provides driving power for display screen driving plate.
Main power board input vehicle working power voltage DC16V~DC36V, to external sensor unit export DC5V and to
Simulate camera unit output DC12V driving powers；Battery unit ensures system just in the state of vehicle working power power down
Often work, the battery unit have intelligent recharge and discharge controlling mechanism, are not consumed in the state and power supply for ensuring its operating mode safety
Maintenance system is manufactured experimently in the case of to the greatest extent and is in live line work, with the order of timely response system；USB interface connects external USB and leads to
With equipment, sound, video file are read, text file provides sound, video source and the e-book document information of system, by display screen
CPU in driving plate carries out parsing driving and display；SD card interface connects external SD card equipment, on the one hand supports to write to system
Configuration information built in SD card, optimization system program update operating procedure, on the other hand can guiding system running log, run SD
The built-in engine map of card, provides navigation Service；GSM provides network registry information, passes through the radio communication circuit built in system
Unit and the GPRS gain antennas of external connection complete GPRS data communication, short message receive capabilities and call voice function；Radio reception
Machine antennal interface is connected to radio processing circuit module, have the function of high sensitivity can parameter configuration, it is automatic to store frequency sweep note
AM the and FM frequency of radio station signal of record and with record user using frequency of radio station characteristic, opening after radio can be preferentially in preview
Secondary station information, the subjective application experience for improving the person used；Loudspeaker unit by internal control circuit driving circuit processing,
It is exportable Hi-Fi stereo, while audio mixing output characteristics is performed according to system source of sound characteristic and realizes the sound of 7 kinds of patterns
Effect pattern is debugged, and the special preferences demand of different application person is adapted to this；Touch control unit and liquid crystal display unit carry out frame patch,
Multi-point touch operation is supported in the case of real-time display, use environment and the application habit of operator is taken into full account, effectively subtracts
Few maloperation and in violation of rules and regulations judgement operation；Utilizing camera interface unit supports 4 road CVBS camera signals inputs, is closed by interior video
Into the processing of circuit unit and the calibration of system configuration parameter, the picture of 4 tunnel picture signals can be shown simultaneously, it also can be according to user
Demand is wherein carried out big picture and is shown all the way by touch control operation and system parameter setting selection in real time；AUX interface units pass through
Built-in circuit drive part realizes the input of external audio unit, can be by user's self-defined selected audio input as needed
Source；Button and rotary switch, which cooperate cooperation touch control unit, can facilitate accurate positionin to operate, and be suitable for different operating custom
User, and can key positioning user function accurately be performed using button operation in the case of being shaken in vehicle operation
Operation.
Integrating for above-mentioned each unit module, Tachographs function, wireless communication work(are realized in vehicle electronics field for the first time
Energy, Big Dipper compatible with GPS positioning function, radio function, audio and video playing function, multi-path camera image procossing and display work(
Can, high-fidelity sound output driving function, AUX audio inputs and playing function, multi-touch function etc.；Each functional unit is in core
The cooperation control of heart CUP and main control MCU is lower efficiently to be completed, and on the one hand saves finished vehicle electronic component layouts space, is reduced previous more
Rat tail and the Electro Magnetic Compatibility interference that a function single product integrates；In addition the product is highly integrated, and the development phase passes through
The unified adjustment and installation of product function efficiently solves the compatibility of each function of product.The exploitation of the product not only improves amusement
Application function improves the driving comfort of user, meets the trend of current vehicle electronics development；Simultaneously because being configured on its hardware
There are automobile data recorder unit and camera display function, travel condition of vehicle and operational safety can be monitored in real time, improve
Vehicle operational safety.By each circuit module of above-mentioned main power board fit through MCU management and control Big Dippeves compatible with GPS position, GPRS without
Line communication, signal processing record, the driving of CAN bus signal monitoring, radio and display driving plate and USB interface and SD interface plate
Between communicate；By each circuit module of display screen driving plate fit through CPU be managed audio/video decoding, video display output,
Camera signals parsing, the cutting merging of camera received image signal are simulated, offline navigation map drives, liquid crystal driving,
Systematization is carried out by this method and integrates completion Tachographs data record and audio-visual entertainment service and auxiliary driving function, and is carried
Supplying monitoring plateform system and diagnostic system use.
Main power board as shown in Figure 2 include the reset circuit being connected respectively with MCU, crystal oscillating circuit, ferroelectric memory circuit,
CAN communication circuit, internal screen telecommunication circuit, gsm communication process circuit, Big Dipper positioning circuit, signal acquisition processing circuit, radio reception
Drive circuit, IC card identification circuit, audio frequency processing circuit, R232 telecommunication circuits, 3 axis gyroscope blocks and USB, SD communication
Circuit；The MCU is also respectively connected with multi-stage power source process circuit and built-in power, and the multi-stage power source process circuit connects respectively
Mains input detection circuit and power output circuit.
Mains input detection circuit carries out after transient state inhibition processing, anti-reverse processing, filtering process are carried out to input voltage
Supply voltage detection identification, inputs to multi-stage power source process circuit list when voltage value is between DC16V~DC36V as defined in system
Member handles backward system output DC12V, DC5V, DC4.2V, DC3.3V voltage, while exports DC12V and DC5V to externally fed
It is used for vehicle speed sensor and external camera unit；When voltage value is less than DC16V, to protect the battery of vehicle electric power system
Service life, system stop power supply and into deep sleep state, prevent cell voltage from exhausting, cause the failure of unrepairable；
When cell voltage is higher than DC36V, system stops power supply and into deep sleep state, prevents abnormal voltage from causing system can not
The damage of reparation, and when the abnormal voltage recovers between normal voltage DC16V~DC36V, system can be recovered automatically to just
Normal working condition.Wherein CAN communication circuit connects vehicle CAN communication bus to MCU, is responsible for system and is handed over vehicle into row information
Mutually, the real time monitoring to vehicle dynamic regime and vehicle body state and diagnosis are completed, while will according to embedded program management and control strategy
Correlated condition and location information are sent to the identification of distal end cloud platform progress big data form by gsm communication process circuit in time
And management and control, and its illegal driver behavior and operation operation note is on record, driving behavior analysis foundation in career is carried out, it is former
Then upper specification drives morals and improves vehicle operational safety；Vehicle trouble messages and abnormal data are analyzed in advance simultaneously, with
The mode of remote diagnosis solves vehicle problem or formulates the rescue measure of road vehicle operation troubles in advance in real time, greatly lowers
Loss.Internal communication circuit connects MCU and the CUP of display screen driving plate, with data interaction communication speed and system hardware port
Resource is carried out using IIS, IIC, IPS mode, it is ensured that signal transmission real-time and accuracy.3 axis gyroscope block units are responsible for
Acquisition acceleration signal is supplied to MCU units, timely when rollover, collision occur for vehicle to vehicle operation posture real time monitoring
It identifies and reports to monitoring center.Audio drive circuitry is received respectively from CPU audio output and radio audio output, is passed through
Output extremely driving loudspeaker and subwoofer equipment after audio mixing special effect processing and audio feature recognition and control.R232 telecommunication circuits are responsible for
Terminal device is connected with external equipment, and to its inside, calibrating parameters are demarcated and inquired about；Equipment working condition is carried out simultaneously
Identification.On the one hand USB, SD telecommunication circuit connect to system with SD card with external USB flash disk and provide audio, video data and navigation information number
According to another aspect USB supports traveling record data export, and SD card supports system program upgrading and system operation LOGO data automatically
Record export.IC card identification circuit unit provides the identification to IC card data, passes through this record driver information.Radio drives
Dynamic circuit unit provides FM and AM frequency ranges for system, and there is high sensitivity to support step-by-step operation by MCU parameter configurationizations, improves
The tuning performance of system.Signal acquisition circuit unit supports 12 road IO identifications, and support is configured to high and low level multiplexer mode, side
Just system matches application.Big Dipper positioning circuit unit supports Big Dipper positioning and GPS positioning mixed mode, according to positioning signal state
System selects mixed positioning pattern to strengthen positioning accuracy, GPS and the independent positioning signal of the Big Dipper also can be independently used, to navigation map
Location information is provided with running data recording.GPS communication processing of circuit unit provides the wireless data service of networking, branch to system
Hold the upload of data and the failure of platform nominal data.By the reasonable combination of circuit on this, main power board is complete under the auxiliary of MCU
Into work in every.
Display screen driving plate as shown in Figure 3 includes reset circuit, crystal oscillating circuit, EMMC the storage electricity being connected respectively with CPU
Road, DDR4 main memory circuits, internal screen telecommunication circuit, liquid crystal display, liquid crystal display drive circuit, touch-control circuit, at 4 road videos
Manage circuit, video cutting circuit, USB, SD telecommunication circuit, R232 telecommunication circuits, driving voicefrequency circuit, keystroke handling circuit；Institute
It states CPU and is also connected with mains input detection circuit and steering engine power supply processing circuit, when the mains input detection circuit connects real-time
Clock unit, the real time clock unit connect onboard clock power supply, and the onboard clock power supply connects CPU；The liquid crystal display
Driving circuit connects liquid crystal display；4 tunnel video processing circuits connection video cuts circuit.
Power supply input circuit receives the DC5V power supplys from main power board processing, by filtering and uncoupling processing through power supply
Handle is DC3.3V, DC1.8V, DC1.2V overlap to EMMC storage circuits, DDR4 circuits, onboard clock power circuit and processing
Device CUP power supplys are powered, and meet the power demands of system.Real time clock circuit and onboard clock power supply coordinate to be provided accurately to system
Clock, and the clock can be modified by the time signal that positioning signal parses, it is ensured that system clock operation is accurate.It resets
Circuit, crystal oscillating circuit, EMMC storage circuits, DDRD circuits are common circuit, provide the support of system operation indispensability.Inside screen is logical
Believe that circuit receives IIS, IIC, IPS from main power board, the interaction of information in completion system.Keystroke handling circuit is using filtering
And uncoupling processing eliminates spike and abnormal jamming signal, it is ensured that system can recognize that accurate status information during button operation,
By performing corresponding actions after system identification.Audio drive circuitry selectes source of sound, and source of sound is selected from radio according to user's operation
Or the audio or digital map navigation voice or system of internal system broadcasting forecast audio, by the real-time seamless switching of the circuit, and
The noise of system can be effectively eliminated, it is ensured that the comfort that user uses.External R232 telecommunication circuits and USB, SD telecommunication circuit are
Data interaction interface carries out export, configuration and audio and video, the calling of map datum of nominal data.Video cuts circuit and 4 tunnels
Video processing circuits is responsible for the external 4 tunnels simulation camera of driving, while receives image information, it is independently shown or by can
Programmed algorithm is cut to a graphic interface while shows 4 image datas.Touch-control circuit only can support touching signals processing
Multi-point touch operation provides the signal source of user's operation to system.Liquid crystal display display driver circuit and liquid crystal display cooperation, CUP
The image information of output is transmitted to image analysis circuit through transmitting driving circuit and matching impedance circuit, in liquid after parsing
Brilliant information displayed on screen.By the reasonable combination of circuit on this, display screen driving plate completes work in every under the auxiliary of CUP.
Big Dipper positioning circuit as shown in Figure 4 includes Beidou positioning information parsing data channel all the way, another way GPS positioning letter
Breath parsing data channel；Two paths of data parsing channel reception is after BD, GPS antenna signal to the Big Dipper and GPS after amplifier
Respective demodulator and Base-Band Processing is transmit digital signal arithmetic unit after digital signal, by the DSP operation week for being internally embedded formula
More star signal resolutions go out co-ordinate position information in phase, are sent to the MCU on motherboard power supply plate by serial ports, provide whole system
Binary channels location information.Specific parsing content includes：UTC, the date, ground level, course, satellite number, TDOP, PDOP, HDOP,
The information such as VDOP signal strengths, station-keeping mode, positioning states, satellite elevation angle, azimuth, signal-to-noise ratio.MCU by above-mentioned signal again
CPU element function whole system calling is transferred to after group bag, auxiliary completes the functions such as real-time time, digital map navigation.
The BEI-DOU position system researched and developed using such Big Dipper compatible positioning process circuit, one side active adoption China,
Quickly propel industrialization, marketing development；On the other hand in view of current Big Dipper positioning global spreadability, system design introduce GPS
Location information carries out rationally effective supplement；Under the conditions of effective position, there is higher precision using which prioritizing selection
Location information, so as to effectively reduce system position error；GPS positioning information is used in current Big Dipper uncovered area, with
Ensure that system can be positioned.It avoids breaking down temporarily because of some passage using the design or Positioning Satellite information transmission occurs
When abnormal, deletion mapping informational influence components of system as directed application of function improves the reliability of system operation.
Gsm communication process circuit receiving channel as shown in Figure 5 passes through after connecting duplexer to RF transceivers by GPRS antenna
Anti-aliasing Filter Circuits to analogue baseband processors circuit, under MCU control conditions through Analog Baseband process circuit inside
Digital baseband and process circuit are transferred to after ADC/DAC process circuits, control GPIO circuits and sound equipment GPIO processing of circuit,
Under MCU control conditions digital signal solution is completed through digital base band processor circuit internal DSP operations unit, logic circuit and memory
Analysis；Sendaisle connects smoothed filter circuit to RF transceivers through power amplification electricity by Analog Baseband process circuit unit simultaneously
Road is after duplexer to GPRS antenna；External sound signal, which was inputted after MIC, to be connected to after speech processing circuit to Analog Baseband
Process circuit, voice signal were connected to loudspeaker after exporting voice driven circuit.By foregoing circuit in set control logic condition
Under with GPRS data stream mode complete data double-way send and local data file record, and can carry out double-directional speech function and this
Ground voice document record.
Being had both using this scheme system has the function of voice call function and remote monitoring real-time query, by microprocessor
The real-time registered task of management and control network.Meanwhile operated using data markers, on the one hand editable multiport registering functional can pass through
Serial port protocol changes network registry address and port information, can also pass through platform data protocol modification network registry address and port
Information can also be used SMS scheme and be put down by given protocol form modifying network registry address and port information, optimization system
Platform registration process facilitates engineering staff and operating personnel to use.
Analog signal (the N systems of vision signal input processing circuit acquisition four-way CCD camera CH passage inputs as shown in Figure 6
Formula, P standards) signal feeding video dissection process circuit unit is digitized processing after Anti-aliasing Filter Circuits are handled；Place
Digital data transmission after reason cuts circuit to video and carries out video cutting merging and progress sharpening processing, send to CUP, by liquid
Crystal display screen shows final image interface.By foregoing circuit under the conditions of set control logic, the only of 4 road camera signals is completed
Vertical selectivity display shows that 4 road cameras merge image information simultaneously.
Multiple power supplies process circuit unit as shown in Figure 7 is by DC24V process circuits, protection circuit, voltage detecting circuit, electricity
Press self-testing circuit, 12V process circuits, 5V process circuits, 4.2V process circuits, battery unit, 3.3V process circuits, screen driving plate
Power-supply system forms, and DC24V process circuits, protection circuit, filter circuit filter input power inlet wire, anti-reverse protection and steady
Pressure processing is exported with ensuring that the reference power supply of input system is reliable to voltage detecting circuit, overvoltage self-testing circuit to 12V processing
2 tunnel of circuit branch is exported to 5V process circuits and screen driving plate power system circuit；5V power supply processing circuit units export respectively
Power supply to 4.2V process circuits, 3.3V process circuits and CAN circuit, URAT circuits, gsm communication process circuit, 3 axis gyroscopes
Circuit and external output circuit.Wherein 12V process circuits, 5V process circuits use multiple-channel output type power supply processing circuit, according to
System condition control current output capability, not only can reasonably optimizing system power dissipation, also controllable system heat dissipate damage；Voltage detecting
Circuit unit monitors input voltage signal in real time, inputs to MCU and calculates voltage value, and the voltage value is passed through telecommunication side
Formula feeds back to platform；Voltage self-testing circuit is powered by control system, and DC16V~DC36V normal range (NR)s are in vehicle voltage
When interior, system can normally work on power, remaining abnormal conditions system not powered operation.By foregoing circuit in set control logic item
Under part, Power Supply Monitoring, the system power supply management and control of this system are completed, it is ensured that system power supply is safe and in real time monitoring state.
On the one hand power drives are provided to outside port, while operation power supply is provided to each functional unit of main power board, in addition to display
Driving plate provides operation power supply；Whole system is converted using low drop voltage, can effectively prevent vehicle complexity power supply system
Fluctuation impact caused by voltage jump, it is ensured that whole system is efficient, reliably working.
Audio driven process circuit as shown in Figure 8 is by audio signal input source, CPU element, audio modulating circuit unit, sound
Frequency drive control circuit unit, 2 tunnels driving power amplifier unit, loudspeaker composition, the navigation that wherein audio signal input source includes carry
ShowUnit, SD card and USB storage audio file, radio unit, MIC units, AUXUnitAnd signal processing unit composition, audio
The navigation hint included of signal input sourcesUnit, SD card, USB CUP, decoded processing are connected to by respective peripheral circuit unit
After export to audio modulating circuit unit, audio signal that audio modulating circuit unit inputs it carry out stereo process export to
Signal transmission drives external loading loudspeaker to power amplifier unit is driven after audio drive circuitry carries out stereo process.By foregoing circuit
Under the conditions of set control logic by the signal processing that system audio input source provides into specific sound and stereo mode
Output, while there is audio mixing special effect processing pattern to have distinguished primary and secondary sound feature under different application pattern and export, and 7 kinds of sounds can be set
Effect pattern is to adapt to different application main body.
Audio driven process circuit is composed prime input filter and accumulator, source switch modulation by resolution element
Circuit and rear level power supply energy storage smooth treatmenting circuit and pressure limiting circuit composition, to meet the processing to vehicle complexity power-supply system,
The influence that its power amplifier output unit is made to change from external power supply provides audio driven optimum power state always.Entire audio
Output is not only mutated and the noise interference generation that causes to distort from power supply, is improved the comfort using process, and is improved system
Working power scope, built-in self-built switch voltage-stabilizing process circuit lower power consumption and heat dissipation, increase power supply stability, are system
Long-time stable application provides basic condition.
CAN bus signal monitoring of the present invention gathers vehicle power CAN, vehicle body CAN bus signal, and correlated condition signal is held
Row implementing monitoring, under the auxiliary of MCU by GSM circuits wirelessly Real-time Feedback to monitor supervision platform；Follow-up carry simultaneously
Remaining algorithm is stayed to calculate complete-vehicle oil consumption data in real time, platform is uploaded and is monitored；Judge Vehicular behavior, root according to bus signals
It walks lamely according to set strategy execution, and these state models is sent to vehicle by the pre-designed message data form of system
Electronic control module and diagnostic equipment.Wherein, each malfunction has a message to correspond to therewith, and message content can be according to difference
System or customer requirement are configured, and increase versatility.To ensure the matching with vehicle network, carried in CAN communication pattern
BUS OFF functions, it is ensured that itself CAN communication mistake does not interfere with Full-vehicle CAN bus network blocking, ensures system communication stream
Freely, versatility and reliability are improved.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention god.
Claims (7)
1. a kind of Big Dipper is compatible with board information terminal, which is characterized in that including USB interface, the SD being connected respectively with main power board
Card interface, battery unit, SIM card, IC card unit, GPRS antenna, radio antenna and BD, GPS antenna drive respectively with display screen
Loudspeaker, touch control unit, liquid crystal display, utilizing camera interface, AUX interfaces and button, the button switch that movable plate connects；The main electricity
Source plate is connected by data/address bus with display screen driving plate, and main power board provides driving power for display screen driving plate.
2. a kind of Big Dipper compatibility board information terminal as described in claim 1, which is characterized in that the main power board includes dividing
Reset circuit, crystal oscillating circuit, ferroelectric memory circuit, CAN communication circuit, internal screen telecommunication circuit, the GSM not being connected with MCU lead to
Believe process circuit, Big Dipper positioning circuit, signal acquisition processing circuit, radio reception drive circuit, IC card identification circuit, audio frequency process
Circuit, R232 telecommunication circuits, 3 axis gyroscope blocks and USB, SD telecommunication circuit；The MCU is also respectively connected at multi-stage power source
Reason circuit and built-in power, the multi-stage power source process circuit connect mains input detection circuit and power output circuit respectively；
The display screen driving plate include the reset circuit being connected respectively with CPU, crystal oscillating circuit, EMMC storage circuits, in DDR4
It deposits circuit, internal screen telecommunication circuit, liquid crystal display, liquid crystal display drive circuit, touch-control circuit, 4 tunnel video processing circuits, regard
Frequency cuts circuit, USB, SD telecommunication circuit, R232 telecommunication circuits, driving voicefrequency circuit, keystroke handling circuit；The CPU also connects
Mains input detection circuit and steering engine power supply processing circuit are connect, the mains input detection circuit connects real time clock unit, institute
Real time clock unit connection onboard clock power supply is stated, the onboard clock power supply connects CPU；The liquid crystal display drive circuit connects
Connect liquid crystal display；4 tunnel video processing circuits connection video cuts circuit.
A kind of 3. Big Dipper compatibility board information terminal as claimed in claim 2, which is characterized in that the Big Dipper positioning circuit bag
Include Beidou positioning information parsing data channel all the way, another way GPS positioning information parsing data channel；Two paths of data parses passage
It receives from BD, after GPS antenna signal after amplifier to the Big Dipper and the respective demodulators of GPS and Base-Band Processing be digital signal
Digital signal arithmetic unit is transmitted afterwards, goes out co-ordinate position information by being internally embedded more star signal resolutions in the DSP operation cycle of formula, is led to
The MCU that serial ports is sent on motherboard power supply plate is crossed, the binary channels location information of whole system is provided.
A kind of 4. Big Dipper compatibility board information terminal as claimed in claim 2, which is characterized in that the gsm communication processing electricity
Road receiving channel by GPRS antenna connect duplexer to RF transceivers after through Anti-aliasing Filter Circuits to analogue baseband processors
Circuit, through ADC/DAC process circuits, control GPIO circuits and the sound inside Analog Baseband process circuit under MCU control conditions
Digital baseband and process circuit are transferred to after ringing GPIO processing of circuit, through in digital base band processor circuit under MCU control conditions
Portion's DSP operation unit, logic circuit processing and memory complete digital signal parsing；Sendaisle is handled by Analog Baseband simultaneously
Circuit unit connect smoothed filter circuit to RF transceivers after power amplification circuit duplexer to GPRS antenna；External language
Sound signal was connected to after speech processing circuit after inputting MIC to Analog Baseband process circuit, and voice signal exported voice drive
Loudspeaker are connected to after dynamic circuit.
A kind of 5. Big Dipper compatibility board information terminal as claimed in claim 2, which is characterized in that the vision signal input
The analog signal of reason circuit acquisition four-way CCD camera CH passage inputs signal after Anti-aliasing Filter Circuits are handled is sent into video solution
Analysis process circuit unit is digitized processing；Digital data transmission that treated cuts circuit to video and carries out video cutting conjunction
And sharpening processing is carried out, is sent to CUP, final image interface is shown by liquid crystal display.
A kind of 6. Big Dipper compatibility board information terminal as claimed in claim 2, which is characterized in that the multiple power supplies processing electricity
Road unit is by DC24V process circuits, protection circuit, voltage detecting circuit, voltage self-testing circuit, 12V process circuits, 5V processing electricity
Road, 4.2V process circuits, battery unit, 3.3V process circuits, screen driving plate power-supply system composition, DC24V process circuits, protection
Circuit, filter circuit filter input power inlet wire, anti-reverse protection and voltage stabilizing handle to ensure the reference power supply of input system
Reliably, export to voltage detecting circuit, overvoltage self-testing circuit to 2 tunnel of 12V process circuits branch export to 5V process circuits and
Shield driving plate power system circuit；5V power supply processing circuits unit distinguishes out-put supply to 4.2V process circuits, 3.3V processing electricity
Road and CAN circuit, URAT circuits, gsm communication process circuit, 3 axis gyroscope blocks and external output circuit.
A kind of 7. Big Dipper compatibility board information terminal as claimed in claim 2, which is characterized in that the audio driven processing electricity
Routing of audio signals input source, CPU element, audio modulating circuit unit, audio driven control circuit unit, 2 tunnels driving power amplifier
Unit, loudspeaker composition, the navigation hint that wherein audio signal input source includesUnit, SD card and USB storage audio file, radio reception
Machine unit, MIC units, AUXUnitAnd signal processing unit composition, the navigation hint included of audio signal input sourceUnit, SD card,
USB is connected to CUP by respective peripheral circuit unit, is exported after decoded processing to audio modulating circuit unit, voice modulation
The audio signal that circuit unit inputs it carries out signal after stereo process is exported to audio drive circuitry progress stereo process and passes
Driving power amplifier unit is transported to, drives external loading loudspeaker.
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| CN201711353600.6A CN108045332A (en) | 2017-12-15 | 2017-12-15 | A kind of Big Dipper is compatible with board information terminal |
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| CN201711353600.6A CN108045332A (en) | 2017-12-15 | 2017-12-15 | A kind of Big Dipper is compatible with board information terminal |
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