CN103413429A - Bus-mounted video monitoring and dispatching management system based on davinci platform - Google Patents
Bus-mounted video monitoring and dispatching management system based on davinci platform Download PDFInfo
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Abstract
A bus-mounted video monitoring and dispatching management system based on a davinci platform is composed of a power source module (1100), a host (1200) and an operating terminal (1300). The power source module (1100) supplies power output to the system and conducts communication with the host (1200) through a digital/analog interface to mainly achieve the functions of switching system working conditions, amplifying audio power and the like. The host (1200) is used as the core of the system and mainly achieves the functions of audio and video data collection, digital signal processing, bus real-time positioning, system network control, wireless communication control, bus-mounted device management and the like. The operating terminal (1300) is a man-machine interface towards a bus driver, conducts communication with the host (1200) by using an RS 485 interface and achieves human-machine interaction between the bus driver and the system through a related functional button, an infrared remote controller and a color liquid crystal display screen.
Description
Technical field
The present invention relates to the technical fields such as internet, multimedia, GPS location, wireless mobile communications and radio-frequency (RF) identification, particularly relate to a kind of public transport vehicle-mounted video monitoring and dispatching management information system based on Leonardo da Vinci's platform.
Background technology
Along with the fast development of urban economy, the contradiction between Urban traffic demand rapid growth and resource environment constraint is becoming increasingly acute.In order to adapt to the demand of Urban Traffic motorization development process, the demand that particularly adapts to city and traffic good interaction, under its development of informationization technology, management system of public traffic with vehicle management and intelligent scheduling function starts to enter the public transport industry, and urban public transport has stepped informationalized paces.
But at present, existing public transport vehicle-mounted electronic equipment is of a great variety and separate, and the Bus information resource can't effectively fully utilize; The public transit system operation mode is outmoded, can't effectively improve transit quality of service and user and experience; Public transport vehicle-mounted electronic device information technology application level is lower, and business administration can't be broken away from manual operations and experience management phase.These have seriously restricted the development of urban transportation towards " unimpeded, efficient, safety, green " direction.In order to adapt to the demand of Traffic Development, be badly in need of a kind ofly for transit operation provides a kind of, vehicle electronic device being carried out unified management, vehicle-state being monitored in real time, public transit system running is realized to omnidistance intelligent distribution and management system of intervening.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, for transit operation provides a kind of, vehicle electronic device is carried out unified management, vehicle-state is monitored in real time, public transit system is operated and realizes omnidistance intelligent distribution and management system of intervening.
A kind of public transport vehicle-mounted video monitoring and dispatching management information system based on Leonardo da Vinci's platform is characterized in that: system is comprised of power module (1100), main frame (1200) and operating terminal (1300) three parts, wherein, main frame (1200) is the core of system, power module (1100) system-oriented provides power supply output, by digital-to-analog interface and main frame (1200), communicate, operating terminal (1300) is the Man Machine Interface towards the vehicle driver, by the data between RS485 Interface realization and main frame (1200) and the transmission of control signal, the composite analog video signal sent by analog interface Receiving Host (1200), by the correlation function button, Infrared remote controller also coordinates chromatic liquid crystal screen, realize the man-machine interaction between vehicle driver and system,
Described power module (1100) is supported the input of direct current wide power, comprise that mainly power supply conversion output, mode of operation are controlled, power network is controlled and Audio power amplifier four partial function circuit, realize the conversion of system front end power supply, working state of system switching, Audio power amplifier, power network control;
Described power supply conversion output function circuit is supported the input of 9-36V direct current wide power, the output of 12V/6A power supply, wherein towards the four external cameras in tunnel and the operating terminal (1300) of main frame (1200), video acquisition functional module (1202), respectively provides the output of 12V/2A direct current respectively;
Described mode of operation is controlled functional circuit by digital interface Real-Time Monitoring vehicle launch signal, coupled system sleeping/waking control signal, and under the cooperation of main frame (1200), control system automatically switches between mode of operation and low-power consumption mode;
Described power network is controlled functional circuit according to the current different mode of operation of system and state, by digital interface, the four external camera power supplys in tunnel towards video acquisition functional module (1202) and Audio power amplifier output is carried out to switch control;
Described Audio power amplifier functional circuit receives the two-way simulated audio signal from main frame (1200) by analog interface, supports the output of two-way bridge-tied load Audio power amplifier, and output power is respectively 10W and 40W;
Described main frame (1200) is the core of system, adopt the framed structure of DaVinci (Leonardo da Vinci)+FPGA, mainly comprise signal processor (1201), video acquisition functional module (1202), audio collection functional module (1203), audio frequency is reported functional module (1204), mobile unit interface module (1205), wireless mobile communications module (1206), Wi-Fi module (1207), GPS module (1208), Interface Expanding functional module (1209), SD card memory function module (1210) and system program memory module (1211), the enforcement audio, video data gathers, digital signal processing, vehicle is located in real time, grid is controlled, the control of radio communication connection and mobile unit,
Described signal processor (1201) is the core cell of digital signal processing, is comprised of DaVinci (Leonardo da Vinci)+FPGA; During system works, mainly by FPGA, realized the pre-service that gathers the video data obtained and the communication connection between peripheral circuit and DaVinci (Leonardo da Vinci), implemented by DaVinci (Leonardo da Vinci) that encoding and decoding audio and video data is processed, grid is controlled and the control of each functional module of periphery;
Described video acquisition functional module (1202) is supported the Real-time Collection of 4 road CIF form (standardized images form) videos; Four-way CCD camera is powered by power module (1100), the video data number of the delivering letters processor (1201) collected, at first by FPGA, implement 4 road CIF form (standardized images form) videos synthesizing to the 4CIF resolution video, by VPFE interface (Video Processing Front-End, Video processing front-end interface), send DaVinci (Leonardo da Vinci) to carry out the Unified coding processing again;
Described audio collection functional module (1203) communicates by ASP interface (Audio Serial Port, audio serial interface) and signal processor (1201), supports the Real-time Collection of two-way audio;
Described audio frequency is reported the conversion that functional module (1204) is implemented Text To Speech, communicates by ASP interface (Audio Serial Port, audio serial interface) and signal processor (1201), supports three road voice broadcasts; Wherein two-way coordinates the audio power amplifying circuit in power module (1100) to implement vehicle interior and outside voice broadcast, the voice broadcast of the text message towards the vehicle driver that Third Road enforcement transit operation center issues; The switching of three road voice-grade channels, switch and volume are distinguished controlled by digital interface;
Described mobile unit interface module (1205) comprises the accurate industrial series interface of three road signs (RS232 or RS485) and multi-path digital/analog interface, supplies the access of vehicle electronic device to implement the unified management of vehicle electronic device; Wherein, the type of each road serial line interface (being RS232 or RS485) is configurable, for realizing and the communicating by letter of vehicle-mounted LED display screen equipment, the digital-to-analog interface can be realized the control of switch for vehicle door, body light light and the monitoring of mobile unit state;
Described wireless mobile communications module (1206) is connected with the wireless mobile communications of transit operation center and public wireless network be used to realizing system; According to different demands, the module that wireless mobile communications module (1206) can choice for use GPRS technology, module that also can the choice for use 3G technology; When wireless mobile communications module (1206) adopted the GPRS technology, module communicated by UART interface and signal processor (1201); When wireless communication module adopted 3G technology, module communicated by USB interface and signal processor (1201);
Described Wi-Fi module (1207) communicates by USB interface and signal processor (1201), coordinate wireless mobile communications module (1206) to build WLAN, towards the passenger, provide local free wireless access service, by with bus station in the batch that is connected the mass data that the wireless renewal that realizes system program and system acquisition obtain of Wi-Fi Hotspot upload;
Described GPS module (1208) communicates by UART interface and signal processor (1201), the status informations such as Real-time Collection vehicle location, speed in the vehicle operating process, the status informations such as the vehicle current location that cooperation wireless mobile communications module (1206) will collect by mobile radio networks, speed are uploaded to the transit operation central server in real time;
Described Interface Expanding functional module (1209) communicates by USB interface and signal processor (1201), according to client's needs, provides the configurable industrial standard serial ports of multichannel type (RS232/RS485), CAN bus interface and digital-to-analog interface;
Described SD card memory function module (1210) communicates by the SD card controller interface on DaVinci (Leonardo da Vinci) and signal processor (1201);
Described system program memory module (1209) adopts large capacity NAND FLASH chip, by the external memory interface on DaVinci (Leonardo da Vinci) and signal processor (1201), communicates the storage system program; Between NAND FLASH chip and DaVinci (Leonardo da Vinci), realize the conversion of signal level by FPGA;
Described operating terminal (1300) is as Man Machine Interface, mainly comprises function of infrared remote control module (1301), manually call out the stops functional module (1302), microcontroller (1303), radio frequency recognition function module (1304) and video playback capability module (1305); This end face provides 20 buttons to the vehicle driver, comprise " beginning " key, " end " key, " switching " key, " confirmation " key, " menu " key, " warning " key, four direction key and 0 to 9 totally ten digital keys, coordinate Infrared remote controller and chromatic liquid crystal screen, realize the man-machine interaction between vehicle driver and system;
Described operating terminal (1300) is realized communicating by letter with main frame (1200) by industrial standard serial ports RS485 under the control of microcontroller (1303), realize the transmission of data and control signal etc.;
Described function of infrared remote control module (1301) receives infrared remote instruction by the upper I/O mouth with interrupt function of microcontroller (1303), with realization, system state, system time, grid connection, the volume of calling out the stops etc. is arranged and adjusts;
The described functional module (1302) of manually calling out the stops communicates with interrupt function I/O mouth and microcontroller (1303) by microcontroller (1303) is upper, coordinate function button to realize the manual voice broadcast of bus station and public transport service expression, according to the needs of Vehicular behavior, realize the warning of beginning, switching, confirmation, termination and the fortuitous event of vehicle operating task;
Described radio frequency recognition function module (1304) communicates by SPI interface (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) and microcontroller (1303), reads the IC-card information of bus drivers;
Described video playback capability module (1305) receives from VPBE interface (Video Processing Back-End in signal processor (1201) by analog interface, the Video processing back end interface) composite analog video signal of exporting also converts the digital rgb format video signal to, shows by 7 cun chromatic liquid crystal screens that are positioned at operating terminal (1300).
Advantage of the present invention is: device integration is high, the information real-time is good, the equipment operation cost is low, the user experiences better and system operation mode is versatile and flexible, can effectively improve service quality and the information system management level of public transit system.
The accompanying drawing explanation
Accompanying drawing 1 is the one-piece construction schematic block diagram of native system.
Accompanying drawing 2 is video acquisition and the treatment circuit structural representation block diagram of native system.
Accompanying drawing 3 is the workflow schematic block diagram of native system.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated:
As shown in Figure 1, a kind of public transport vehicle-mounted video monitoring based on Leonardo da Vinci's platform and dispatching management information system (hereinafter to be referred as system) is characterized in that: system is comprised of power module (1100), main frame (1200) and operating terminal (1300) three parts.Wherein, power module (1100) system-oriented provides power supply output, communicates by digital-to-analog interface and main frame (1200), realizes the functions such as working state of system switching, Audio power amplifier, power network control; Main frame (1200) is as the core of system, completes mainly that audio, video data collection, digital signal processing, vehicle are located in real time, grid is controlled, radio communication connects and the function such as mobile unit management; Operating terminal (1300) is the Man Machine Interface towards the vehicle driver, transmission by the data between RS485 Interface realization and main frame (1200) and control signal etc., the composite analog video signal sent by analog interface Receiving Host (1200), by correlation function button, Infrared remote controller and chromatic liquid crystal screen, realize the man-machine interaction between vehicle driver and system.
Described power module (1100) is supported the input of direct current wide power, comprise that mainly power supply conversion output, mode of operation are controlled, power network is controlled and Audio power amplifier four partial function circuit, realize the conversion of system front end power supply, working state of system switching, Audio power amplifier, power network control;
Described power supply conversion output function circuit is supported the input of 9-36V direct current wide power, the output of 12V/6A power supply, wherein towards the four external cameras in tunnel and the operating terminal (1300) of main frame (1200), video acquisition functional module (1202), respectively provides the output of 12V/2A direct current respectively;
Described mode of operation is controlled functional circuit by digital interface Real-Time Monitoring vehicle launch signal, coupled system sleeping/waking control signal, and under the cooperation of main frame (1200), control system automatically switches between mode of operation and low-power consumption mode;
Described power network is controlled functional circuit according to the current different mode of operation of system and state, by digital interface, the four external camera power supplys in tunnel towards video acquisition functional module (1202) and Audio power amplifier output is carried out to switch control;
Described Audio power amplifier functional circuit receives the two-way simulated audio signal from main frame (1200) by analog interface, supports the output of two-way bridge-tied load Audio power amplifier, and output power is respectively 10W and 40W;
Described main frame (1200) is the core of system, adopt the framed structure of DaVinci (Leonardo da Vinci)+FPGA, mainly comprise signal processor (1201), video acquisition functional module (1202), audio collection functional module (1203), audio frequency is reported functional module (1204), mobile unit interface module (1205), wireless mobile communications module (1206), Wi-Fi module (1207), GPS module (1208), Interface Expanding functional module (1209), SD card memory function module (1210) and system program memory module (1211), the enforcement audio, video data gathers, digital signal processing, vehicle is located in real time, grid is controlled, the control of radio communication connection and mobile unit,
Described signal processor (1201) is the core cell of digital signal processing, is comprised of DaVinci (Leonardo da Vinci)+FPGA; During system works, mainly by FPGA, realized the pre-service that gathers the video data obtained and the communication connection between peripheral circuit and DaVinci (Leonardo da Vinci), implemented by DaVinci (Leonardo da Vinci) that encoding and decoding audio and video data is processed, grid is controlled and the control of each functional module of periphery;
Described video acquisition functional module (1202) is supported the Real-time Collection of 4 road CIF form (standardized images form) videos; Four-way CCD camera is powered by power module (1100), the video data number of the delivering letters processor (1201) collected, at first by FPGA, implement 4 road CIF form (standardized images form) videos synthesizing to the 4CIF resolution video, by VPFE interface (Video Processing Front-End, Video processing front-end interface), send DaVinci (Leonardo da Vinci) to carry out the Unified coding processing again;
Described audio collection functional module (1203) communicates by ASP interface (Audio Serial Port, audio serial interface) and signal processor (1201), supports the Real-time Collection of two-way audio;
Described audio frequency is reported the conversion that functional module (1204) is implemented Text To Speech, communicates by ASP interface (Audio Serial Port, audio serial interface) and signal processor (1201), supports three road voice broadcasts; Wherein two-way coordinates the audio power amplifying circuit in power module (1100) to realize vehicle interior and outside voice broadcast, and Third Road is for the voice broadcast of the text message towards the vehicle driver implementing the transit operation center and issue; The switching of three road voice-grade channels, switch and volume are distinguished controlled by digital interface;
Described mobile unit interface module (1205) comprises the accurate industrial series interface of three road signs (RS232 or RS485) and multi-path digital/analog interface, supplies the access of vehicle electronic device to implement the unified management of vehicle electronic device; Wherein, the type of each road serial line interface (being RS232 or RS485) is configurable, for realizing and the communicating by letter of vehicle-mounted LED display screen equipment, the digital-to-analog interface can be realized the control of switch for vehicle door, body light light and the monitoring of mobile unit state;
Described wireless mobile communications module (1206) is connected with the wireless mobile communications of transit operation center and public wireless network be used to realizing system; According to different demands, the module that wireless mobile communications module (1206) can choice for use GPRS technology, module that also can the choice for use 3G technology; When wireless mobile communications module (1206) adopted the GPRS technology, module communicated by UART interface and signal processor (1201); When wireless communication module adopted 3G technology, module communicated by USB interface and signal processor (1201);
Described Wi-Fi module (1207) communicates by USB interface and signal processor (1201), coordinate wireless mobile communications module (1206) to build WLAN, towards the passenger, provide local free wireless access service, by with bus station in the batch that is connected the mass data that the wireless renewal that realizes system program and system acquisition obtain of Wi-Fi Hotspot upload;
Described GPS module (1208) communicates by UART interface and signal processor (1201), the status informations such as Real-time Collection vehicle location, speed in the vehicle operating process, the status informations such as the vehicle current location that cooperation wireless mobile communications module (1206) will collect by mobile radio networks, speed are uploaded to the transit operation central server in real time;
Described Interface Expanding functional module (1209) communicates by USB interface and signal processor (1201), according to client's needs, provides the configurable industrial standard serial ports of multichannel type (RS232/RS485), CAN bus interface and digital-to-analog interface;
Described SD card memory function module (1210) communicates by the SD card controller interface on DaVinci (Leonardo da Vinci) and signal processor (1201);
Described system program memory module (1209) adopts large capacity NAND FLASH chip, by the external memory interface on DaVinci (Leonardo da Vinci) and signal processor (1201), communicates the storage system program; Between NAND FLASH chip and DaVinci (Leonardo da Vinci), realize the conversion of signal level by FPGA;
Described operating terminal (1300) is as Man Machine Interface, mainly comprises function of infrared remote control module (1301), manually call out the stops functional module (1302), microcontroller (1303), radio frequency recognition function module (1304) and video playback capability module (1305); This end face provides 20 buttons to the vehicle driver, comprise " beginning " key, " end " key, " switching " key, " confirmation " key, " menu " key, " warning " key, four direction key and 0 to 9 totally ten digital keys, coordinate Infrared remote controller and chromatic liquid crystal screen, realize the man-machine interaction between vehicle driver and system;
Described operating terminal (1300) is realized communicating by letter with main frame (1200) by industrial standard serial ports RS485 under the control of microcontroller (1303), realize the transmission of data and control signal etc.;
Described function of infrared remote control module (1301) receives infrared remote instruction by the upper I/O mouth with interrupt function of microcontroller (1303), with realization, system state, system time, grid connection, the volume of calling out the stops etc. is arranged and adjusts;
The described functional module (1302) of manually calling out the stops communicates with interrupt function I/O mouth and microcontroller (1303) by microcontroller (1303) is upper, coordinate function button to realize the manual voice broadcast of bus station and public transport service expression, according to the needs of Vehicular behavior, realize the warning of beginning, switching, confirmation, termination and the fortuitous event of vehicle operating task;
Described radio frequency recognition function module (1304) communicates by SPI interface (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) and microcontroller (1303), reads the IC-card information of bus drivers;
Described video playback capability module (1305) receives from VPBE interface (Video Processing Back-End in signal processor (1201) by analog interface, the Video processing back end interface) composite analog video signal of exporting also converts the digital rgb format video signal to, shows by 7 cun chromatic liquid crystal screens that are positioned at operating terminal (1300).
Management platform as public transport vehicle-mounted electronic equipment, vehicle electronic device can access this system by digital-to-analog interface, RS232/RS485 interface and the CAN bus interface etc. that mobile unit interface module (1205) and Interface Expanding functional module (1209) provide, to form the vehicle electronic device network, thereby realize the unified management of system to vehicle electronic device; System is by the Real-Time Monitoring to equipment state, the identification equipment fault is also carried out alarm to fault, and pass through the mobile radio networks reporting fault to the transit operation center, assist the transit operation center to carry out scheduling decision, to guarantee public transit system safety, the efficient operation.
After vehicle launch, the power module of system (1100) detects the vehicle launch signal, by system hibernates/wake control signal up, by low-power consumption mode, proceeds to mode of operation in conjunction with main frame (1200) control system; After entering mode of operation, at first system completes self check and vehicle electronic device state-detection, radio frequency recognition function module (1304) identification of driver IC-card information, then system by wireless mobile communications module (1206) automatically and the transit operation central server set up wireless connections, report vehicle-state and driver information, receive assignment instructions; The function button that the vehicle driver above is correlated with by operating terminal (1300) etc. carries out the task confirmation, the preliminary work of finishing the work.
The vehicle driver can send telecommand to system by function of infrared remote control module (1301), and equipment state, system time, network connection, the volume of calling out the stops etc. are arranged and adjust, and makes equipment be in best running status.
In the vehicle normal course of operation, the status informations such as the vehicle current location that system obtains according to GPS module (1208), speed, and, in conjunction with mission bit stream, complete simultaneously following work:
(1) in conjunction with audio frequency, report functional module (1204) and towards the passenger, carry out the automatic information broadcast of bus station and public transport service expression, by vehicle-mounted LED display screen, carry out the word displaying simultaneously.
(2) combining wireless mobile communication module (1206) is uploaded in real time the transit operation center by status information and shows with the form of electronic chart by mobile radio networks, realize the real-time control of transit operation center to car status information, assist the transit operation center to manage and scheduling decision;
(3) servers of status information at the transit operation center such as vehicle current location, speed complete parsing, and real-time update realizes that to network electronic map the public is by the real-time query of public network to travel condition of vehicle information.
In the situation that needs, the vehicle driver can intervene the vehicle operation of calling out the stops by the functional module of manually calling out the stops (1302), realizes the manual report work of vehicle site information and public transport service expression.
In the bus normal course of operation, for the text instruction towards bus driver that the transit operation center issues, signal processor (1201) is reported functional module (1204) in conjunction with audio frequency and is reported towards the vehicle driver with the form of voice.
In the bus normal course of operation, in the situation that needs, combining wireless mobile communication module (1206) and audio frequency are reported functional module (1204), by the real-time voice call function, carry out the real-time voice conversation between transit operation center and vehicle driver.Transit operation center and vehicle driver can be the initiators of voice communication, after obtaining the other side's confirmation, namely can carry out real-time speech communicating.
In the bus normal course of operation, system is carried out the audio, video data collecting work by video acquisition functional module (1202) and audio collection functional module (1203) to orientation such as vehicle front, driver and passengers.For mass datas such as the audio frequency that gathers acquisition, videos after treatment, be stored in local SD card on the one hand, finally by the Wi-Fi wireless network, upload in batches, can be used as the processing foundation of accident dispute etc., can be uploaded in real time Bing Zai dispatching center, transit operation center by 3G network (when the wireless mobile communications module of system is selected the module of 3G technology) when needed on the other hand and show in real time, as the foundation of transit operation center implementation scheduling decision.
After this subtask completed, system realized joining with the task at transit operation center by mobile radio networks automatically, and the reporting system state; Whether system interrogation transit operation center has new assignment instructions, if having, reenters execution status of task.
If there is no new assignment instructions, system is by the wireless connections with the transit operation central server, timing reading system program version information and Multi-media Material version information, when new program version or Multi-media Material version being detected, the system for the treatment of is in idle condition, the wireless downloading of automatic implementation system redaction program or redaction Multi-media Material, in new version system program writing system program memory function module (1212), the redaction Multi-media Material is stored in SD card memory function module (1211), treat the system autoboot, complete and upgrade operation, also can be by the renewal operation of the moving update mode completion system program of SD card hand and Multi-media Material.
When vehicle stop operation and system were idle, system power supply module (1100) control system proceeded to low-power consumption mode by mode of operation, waited for lower subtask.
Above-mentioned embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from the modification done under Spirit Essence of the present invention and principle, substitutes, combination, cutting; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (1)
1. public transport vehicle-mounted video monitoring and dispatching management information system based on Leonardo da Vinci's platform, it is characterized in that: system is comprised of power module (1100), main frame (1200) and operating terminal (1300) three parts, wherein, main frame (1200) is the core of system, power module (1100) system-oriented provides power supply output, by digital-to-analog interface and main frame (1200), communicate, operating terminal (1300) is the Man Machine Interface towards the vehicle driver, by the data between RS485 Interface realization and main frame (1200) and the transmission of control signal, the composite analog video signal sent by analog interface Receiving Host (1200), by the correlation function button, Infrared remote controller also coordinates chromatic liquid crystal screen, realize the man-machine interaction between vehicle driver and system,
Described power module (1100) is supported the input of direct current wide power, comprise that mainly power supply conversion output, mode of operation are controlled, power network is controlled and Audio power amplifier four partial function circuit, realize the conversion of system front end power supply, working state of system switching, Audio power amplifier, power network control;
Described power supply conversion output function circuit is supported the input of 9-36V direct current wide power, the output of 12V/6A power supply, wherein towards the four external cameras in tunnel and the operating terminal (1300) of main frame (1200), video acquisition functional module (1202), respectively provides the output of 12V/2A direct current respectively;
Described mode of operation is controlled functional circuit by digital interface Real-Time Monitoring vehicle launch signal, coupled system sleeping/waking control signal, and under the cooperation of main frame (1200), control system automatically switches between mode of operation and low-power consumption mode;
Described power network is controlled functional circuit according to the current different mode of operation of system and state, by digital interface, the four external camera power supplys in tunnel towards video acquisition functional module (1202) and Audio power amplifier output is carried out to switch control;
Described Audio power amplifier functional circuit receives the two-way simulated audio signal from main frame (1200) by analog interface, supports the output of two-way bridge-tied load Audio power amplifier, and output power is respectively 10W and 40W;
Described main frame (1200) is the core of system, adopt the framed structure of DaVinci (Leonardo da Vinci)+FPGA, mainly comprise signal processor (1201), video acquisition functional module (1202), audio collection functional module (1203), audio frequency is reported functional module (1204), mobile unit interface module (1205), wireless mobile communications module (1206), Wi-Fi module (1207), GPS module (1208), Interface Expanding functional module (1209), SD card memory function module (1210) and system program memory module (1211), the enforcement audio, video data gathers, digital signal processing, vehicle is located in real time, grid is controlled, the control of radio communication connection and mobile unit,
Described signal processor (1201) is the core cell of digital signal processing, is comprised of DaVinci (Leonardo da Vinci)+FPGA; During system works, mainly by FPGA, realized the pre-service that gathers the video data obtained and the communication connection between peripheral circuit and DaVinci (Leonardo da Vinci), implemented by DaVinci (Leonardo da Vinci) that encoding and decoding audio and video data is processed, grid is controlled and the control of each functional module of periphery;
Described video acquisition functional module (1202) is supported the Real-time Collection of 4 road CIF form (standardized images form) videos; Four-way CCD camera is powered by power module (1100), the video data number of the delivering letters processor (1201) collected, at first by FPGA, implement 4 road CIF form (standardized images form) videos synthesizing to the 4CIF resolution video, by VPFE interface (Video Processing Front-End, Video processing front-end interface), send DaVinci (Leonardo da Vinci) to carry out the Unified coding processing again;
Described audio collection functional module (1203) communicates by ASP interface (Audio Serial Port, audio serial interface) and signal processor (1201), supports the Real-time Collection of two-way audio;
Described audio frequency is reported the conversion that functional module (1204) is implemented Text To Speech, communicates by ASP interface (Audio Serial Port, audio serial interface) and signal processor (1201), supports three road voice broadcasts; Wherein two-way coordinates the audio power amplifying circuit in power module (1100) to realize vehicle interior and outside voice broadcast, and Third Road is for the voice broadcast of the text message towards the vehicle driver implementing the transit operation center and issue; The switching of three road voice-grade channels, switch and volume are distinguished controlled by digital interface;
Described mobile unit interface module (1205) comprises the accurate industrial series interface of three road signs (RS232 or RS485) and multi-path digital/analog interface, supplies the access of vehicle electronic device to implement the unified management of vehicle electronic device; Wherein, the type of each road serial line interface (being RS232 or RS485) is configurable, for realizing and the communicating by letter of vehicle-mounted LED display screen equipment, the digital-to-analog interface can be realized the control of switch for vehicle door, body light light and the monitoring of mobile unit state;
Described wireless mobile communications module (1206) is connected with the wireless mobile communications of transit operation center and public wireless network be used to realizing system; According to different demands, the module that wireless mobile communications module (1206) can choice for use GPRS technology, module that also can the choice for use 3G technology; When wireless mobile communications module (1206) adopted the GPRS technology, module communicated by UART interface and signal processor (1201); When wireless communication module adopted 3G technology, module communicated by USB interface and signal processor (1201);
Described Wi-Fi module (1207) communicates by USB interface and signal processor (1201), coordinate wireless mobile communications module (1206) to build WLAN, towards the passenger, provide local free wireless access service, by with bus station in the batch that is connected the mass data that the wireless renewal that realizes system program and system acquisition obtain of Wi-Fi Hotspot upload;
Described GPS module (1208) communicates by UART interface and signal processor (1201), the status informations such as Real-time Collection vehicle location, speed in the vehicle operating process, the status informations such as the vehicle current location that cooperation wireless mobile communications module (1206) will collect by mobile radio networks, speed are uploaded to the transit operation central server in real time;
Described Interface Expanding functional module (1209) communicates by USB interface and signal processor (1201), according to client's needs, provides the configurable industrial standard serial ports of multichannel type (RS232/RS485), CAN bus interface and digital-to-analog interface;
Described SD card memory function module (1210) communicates by the SD card controller interface on DaVinci (Leonardo da Vinci) and signal processor (1201);
Described system program memory module (1211) adopts large capacity NAND FLASH chip, by the external memory interface on DaVinci (Leonardo da Vinci) and signal processor (1201), communicates the storage system program; Between NAND FLASH chip and DaVinci (Leonardo da Vinci), realize the conversion of signal level by FPGA;
Described operating terminal (1300) is as Man Machine Interface, mainly comprises function of infrared remote control module (1301), manually call out the stops functional module (1302), microcontroller (1303), radio frequency recognition function module (1304) and video playback capability module (1305); This end face provides 20 buttons to the vehicle driver, comprise " beginning " key, " end " key, " switching " key, " confirmation " key, " menu " key, " warning " key, four direction key and 0 to 9 totally ten digital keys, coordinate Infrared remote controller and chromatic liquid crystal screen, realize the man-machine interaction between vehicle driver and system;
Described operating terminal (1300) is realized communicating by letter with main frame (1200) by industrial standard serial ports RS485 under the control of microcontroller (1303), realize the transmission of data and control signal etc.;
Described function of infrared remote control module (1301) receives infrared remote instruction by the upper I/O mouth with interrupt function of microcontroller (1303), with realization, system state, system time, grid connection, the volume of calling out the stops etc. is arranged and adjusts;
The described functional module (1302) of manually calling out the stops communicates with interrupt function I/O mouth and microcontroller (1303) by microcontroller (1303) is upper, coordinate function button to realize the manual voice broadcast of bus station and public transport service expression, according to the needs of Vehicular behavior, realize the warning of beginning, switching, confirmation, termination and the fortuitous event of vehicle operating task;
Described radio frequency recognition function module (1304) communicates by SPI interface (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) and microcontroller (1303), reads the IC-card information of bus drivers;
Described video playback capability module (1305) receives from VPBE interface (Video Processing Back-End in signal processor (1201) by analog interface, the Video processing back end interface) composite analog video signal of exporting also converts the digital rgb format video signal to, shows by 7 cun chromatic liquid crystal screens that are positioned at operating terminal (1300).
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