CN1510651A - Comprehensive liquid-crystal displaying devices on board - Google Patents
Comprehensive liquid-crystal displaying devices on board Download PDFInfo
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- CN1510651A CN1510651A CNA021455465A CN02145546A CN1510651A CN 1510651 A CN1510651 A CN 1510651A CN A021455465 A CNA021455465 A CN A021455465A CN 02145546 A CN02145546 A CN 02145546A CN 1510651 A CN1510651 A CN 1510651A
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Abstract
The present invention relates to an integrated vehicle-carried liquid crystal displaying system in the technical field of the video communication, the digital signal process and the liquid crystal display, being able to realize the real-time process and display of multi-video-signals, vehicle-carried GPS information and vehicle condition information on the TFT-LCD displaying screen. This system is characterized in that a data collecting unit collects the video image information, the GPS information and the vehicle condition information and sends the information to a signal processing unit; the signal processing unit uses a multi-data information blending technology to make a real-time algorithmic process, and its output of digital signals will control the displaying unit and the warning unit. The integrated vehicle-carried liquid crystal displaying system of the invention can give the surrounding obstacle information and integrate the various vehicle state information. In this system, the displaying unit is activated by digital signals, the multiplex video image and various information such as vehicle-carried GPS information, vehicle state information are displayed by multi-screen-tableaus on a LCD displaying screen, and the warning information on surrounding obstacle can be given at the same time.
Description
Affiliated technical field: the present invention relates to a kind of vehicle-mounted integrated liquid crystal display system, belong to video communication technology, Digital Signal Processing, lcd technology, be real-time processing and the demonstration that on the TFT-LCD display screen, realizes based on multi-channel video signal, vehicle GPS (GLOBAL POSITION SYSTEM) information and the vehicle condition status information (ICSI, In Car Status Information) of DVI (DIGITAL VIDEO INTERFACE) interface standard.
Background technology: along with economic development, the increasing of automobile quantity, it is the problem that common people paid close attention to that congested in traffic and traffic hazard becomes one day by day.A good in-vehicle display system can help the driver to understand the information of the state and the motor vehicle environment of automobile self.This needs are arranged just, and various display techniques all begin to be applied on the automobile.The in-vehicle display system that generally uses on the automobile has following several now:
1) utilize LED display to show that LED display can show information such as simple numerical, literal, vehicle LED display system as domestic-developed can show the vehicle condition of brake, reversing, left-hand rotation, right-hand rotation, emergency automatically, accurately inform back car or pedestrian, guarantee traffic safety.Its defective is display message dullness, display video image information difficulty, and obstacle information and alarm prompt can not be provided automatically.
2) utilize behind the analog monitor display automobile tail of display video image information in real time and the motor vehicle environment image information, this supervisory system also begin to be widely applied to motorbus now and the collision avoidance system of moveing backward in.But the simulation monitoring mode is displays image information merely just, can not carry out profound level processing and other display message that superposes to image information; In addition, generally be that a cover display system can only show one road image, do not possess the function that split screen shows the multi-channel video image.
3) utilize PC system display automobile state and monitoring picture on some high-grade automobiles, adopted monitoring and display system based on the PC platform.This system can show car body video image information on every side in real time, and can carry out profound Flame Image Process, can show multiple information simultaneously.But be based on the system of PC platform, need the support of special video frequency collection card, system's Installation and Debugging and maintenance need higher professional knowledge, and the PC system cost is higher, huge, heavy, do not have portability, real-time is bad, has limited its applying on automobile.
In sum: above-mentioned several display techniques all can not satisfy the needs that present automobile screen shows.LED shows possibility hardly because the display message amount is very limited for vision signal, so just use in some automobiles in early days.Analog monitor can not be comprehensive to GPS and other status information, promptly it does not possess the digital processing function, and road and obstacle information can not be provided, so it can not satisfy the needs of intelligent automobile; Though the PC system can finish the needs that automobile shows basically, system complex, volume is big, power consumption is big, real-time is low, stability is bad, so be a transition method based on the vehicle condition and the monitoring picture of PC technology.
Summary of the invention: for avoiding the defective of prior art, the present invention is as central processing unit and information process unit with DSP, multi-sensor information is carried out comprehensively, adopt DVI display interface standard, real-time display image and status information on LCD, it is characterized in that: data acquisition unit is sent to signal processing unit with video image information, GPS information, the vehicle condition status information of gathering; Signal processing unit utilizes the multidata information fusion technology, carries out real time algorithm and handles, and the output control of its digital signal shows, alarm unit.
For improving real-time calculating and control function, it is core processor that signal processing unit adopts DSP, by extender district and data field, but uses the fast access data-carrier store, the FLASH chip of rewritable, power down protection, the reliably working of assurance system.
Unit of video information is: adopt the CCD electrooptical device to convert analog video data to, analog video number pick through conversion converts digital video signal to by video decoding chip again, digital video signal cushions through FIFO, in the data-carrier store of last collected DSP, consider real-time, we adopt dma mode to carry out background data transfer.
The GPS message unit is: gps signal is behind RS232 and level shifting circuit, and the multi-functional buffered serial port (MCBSP) by DSP deposits in the data-carrier store of DSP.
The vehicle condition status information element is: by the sensor of information such as oil level, water level, temperature, these information via sensors and A/D converter spare deposit in the data-carrier store of DSP by the multi-functional buffered serial port (MCBSP) of DSP.
Consider the character of these information, we utilize dma mode, and wheel changes images acquired information.Utilize the multi-functional buffered serial port (MCBSP) of DSP to gather GPS information, vehicle condition status information.
Display adopts liquid crystal (LCD) display of digital interface, display video information, GPS information and vehicle condition status information in real time, the integrated circuit (IC) chip that display driver chip adopts extensive programmable chip FPGA to design; In addition, our system can carry out algorithm process to video image, identifies the barrier that may constitute a threat to driving that exists around the car body.
Alarm module can employing sound or light or electricity, perhaps three's combination.
Unit of video information can be designed to the multi-channel video image, image is handled carried out detection of obstacles, realizes a plurality of all around direction monitoring around the car.
A kind of software that is used for above-mentioned vehicle-mounted integrated liquid crystal display system, it is characterized in that: during system start-up, at first from the FLASH loading application programs, program then brings into operation, carry out system initialization, comprise DSP clock, serial ports, DMA passage, timer and acquisition module and display controller are carried out initialization, system begins operate as normal.When the video data field interrupts taking place, start the video data interrupt service subroutine, video data is gathered and stored; When serial ports 1 interrupts taking place, start GPS and gather service subprogram, gps data is gathered and stored; When serial ports 2 interrupts taking place, start vehicle condition state acquisition service subprogram, the vehicle condition status data is gathered and stored.We have taked three frame buffer zone methods for video data on software design, and one of them frame buffer zone is used for handling in real time and showing, two frame buffer zones are used for gathering storage in addition, three frame buffer zone samsara circulations between two states.Video data, the pick of GPS number, vehicle condition status data to adopting into adopt special blending algorithm to process processing, send display to show in real time; Adopt the barrier recognizer to carry out algorithm process to video data simultaneously, identify the barrier that may constitute a threat to driving, and start warning device and report to the police.
The vehicle-mounted integrated liquid crystal display system that the present invention proposes can provide the obstacle information of motor vehicle environment, can carry out comprehensively each status information of automobile; Use the digital signal driving display, information such as split screen demonstration multi-channel video image and vehicle GPS information, vehicle condition state provide car body peripheral obstacle warning message simultaneously on a LCD LCDs of automobile.
The present invention is compared with prior art:
Description of drawings:
Fig. 1: theory diagram
Fig. 2: program flow diagram
Fig. 3: embodiment systematic schematic diagram
Fig. 4: embodiment video image deal with data flow process
Embodiment:
Now in conjunction with the accompanying drawings the present invention is further described:
On forming, can be divided into two parts: hardware design and software design.
On the hardware design we to adopt cost performance height, TMS320 series DSP low in energy consumption be core processor, by extender district and data field, but use the FLASH chip of the SRAM of fast access and rewritable, power down protection, guarantee the reliably working of system.For anti-locking system enters deadlock state or program fleet, we have designed the power supply supervisory circuit of system, and fast automatic restarting when making system enter deadlock and program fleet returns to normal operating conditions.Video image converts analog video data to through the CCD electrooptical device, convert digital video signal to through the TVP50 of too high sampling rate series video decoding chip then, digital video signal cushions through FIFO, collect the extending out among the data-carrier store SDRAM of DSP at last, consider real-time, we adopt dma mode to carry out background data transfer; Gps signal is behind RS232 and level shifting circuit, and the multi-functional buffered serial port (MCBSP) by DSP deposits extending out among the data-carrier store SDRAM of DSP in, and GPS information acquisition frequency is 1 time/second; The vehicle condition status information comprises information such as oil level, water level, temperature, these information via sensors and A/D converter spare deposit extending out among the data-carrier store SDRAM of DSP in by the multi-functional buffered serial port (MCBSP) of DSP, consider the character of these information, we adopt wheel to change multi-functional buffered serial port (MCBSP) collection that the mode of gathering is utilized a DSP; Display adopts liquid crystal (LCD) display of digital interface, display video information, GPS information and vehicle condition status information in real time, the integrated circuit (IC) chip that display driver chip adopts extensive programmable chip FPGA to design; In addition, our system can carry out algorithm process to video image, identifies the barrier that may constitute a threat to driving that exists around the car body, and reports to the police by alarm module; Consider that native system is huge, logical relation complexity between each module, we adopt the online programmable chip CPLD of U.S. LATTICE company to design connection logic between each module; Consider the extensibility and the dirigibility of system, we have reserved emulation interface and function expansion interface.In system design, take into full account the decay of high speed circuit board wiring rule and high-frequency signal, and taked relative measures, guaranteed the reliability service of system.
We have taken into full account on-the-spot high-interference environment on the software design, taking hardware measure to eliminate under the prerequisite of disturbing, in software programming, have carried out reliability design.Make calling program at first guarantee high stability, difficult race flies, and flies if secondly run, and system can reset automatically very soon, returns to normal operating conditions.
We have taked three frame buffer zone methods for video data on software design, and one of them frame buffer zone is used for handling in real time and showing, two frame buffer zones are used for gathering storage in addition, three frame buffer zone samsara circulations between two states.To the signal of adopting into, adopt special blending algorithm, various data messages are processed processing, send display to show in real time; Adopt image processing method to carry out algorithm process to video number pick simultaneously, identify the barrier that may constitute a threat to car, and report to the police.
Claims (10)
1, a kind of vehicle-mounted integrated liquid crystal display system is characterized in that: data acquisition unit is sent to signal processing unit with video image information, GPS information, the vehicle condition status information of gathering; Signal processing unit utilizes the multidata information fusion technology, carries out real time algorithm and handles, and the output control of its digital signal shows, alarm unit.
2, vehicle-mounted integrated liquid crystal display system according to claim 1 is characterized in that: it is core processor that signal processing unit adopts DSP.
3, vehicle-mounted integrated liquid crystal display system according to claim 1, it is characterized in that: unit of video information is: adopt the CCD electrooptical device to convert analog video data to, analog video data through conversion converts digital video signal to by the video decoding chip of high sampling rate again, digital video signal cushions through FIFO, in the data-carrier store of last collected DSP.
4, vehicle-mounted integrated liquid crystal display system according to claim 1, it is characterized in that: the GPS message unit is: gps signal is behind RS232 and level shifting circuit, and the multi-functional buffered serial port by DSP deposits in the data-carrier store of DSP.
5, vehicle-mounted integrated liquid crystal display system according to claim 1, it is characterized in that: display adopts liquid crystal (LCD) display of digital interface, display video information, GPS information and vehicle condition status information in real time, display driver chip adopt the integrated circuit (IC) chip of extensive programmable chip FPGA design.
6, vehicle-mounted integrated liquid crystal display system according to claim 1 is characterized in that: alarm module can employing sound or light or electricity, perhaps three's combination.
7, vehicle-mounted integrated liquid crystal display system according to claim 3, it is characterized in that: unit of video information can be designed to the multi-channel video image, image is handled carried out detection of obstacles, realizes a plurality of all around direction monitoring around the car.
8, a kind of Control Software that is used for above-mentioned vehicle-mounted integrated liquid crystal display system is characterized in that: during system start-up, at first from the FLASH loading application programs, program then brings into operation; When the video data field interrupts taking place, start the video data interrupt service subroutine, video data is gathered and stored; When serial ports 1 interrupts taking place, start GPS and gather service subprogram, gps data is gathered and stored; When serial ports 2 interrupts taking place, start vehicle condition state acquisition service subprogram, the vehicle condition status data is gathered and stored; To video data, gps data, the vehicle condition status data of adopting into, adopt special blending algorithm to process processing, send display to show in real time; Adopt the barrier recognizer to carry out algorithm process to video data simultaneously, identify the barrier that may constitute a threat to driving, and start warning device and report to the police.
9, Control Software according to claim 8 is characterized in that: carry out system initialization, comprise DSP clock, serial ports, DMA passage, timer and acquisition module and display controller are carried out initialization.
10, Control Software according to claim 8, it is characterized in that: on software design, taked three frame buffer zone methods for video data, one of them frame buffer zone is used for handling in real time and showing, two frame buffer zones are used for gathering storage in addition, three frame buffer zone samsara circulations between two states.
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| CNA021455465A CN1510651A (en) | 2002-12-23 | 2002-12-23 | Comprehensive liquid-crystal displaying devices on board |
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| CNA021455465A CN1510651A (en) | 2002-12-23 | 2002-12-23 | Comprehensive liquid-crystal displaying devices on board |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887702A (en) * | 2010-06-04 | 2010-11-17 | 广州飞歌汽车音响有限公司 | Vehicle-mounted multimedia double-picture display system and method based on FPGA (Field Programmable Gate Array) |
| CN101603829B (en) * | 2009-06-24 | 2011-05-18 | 北京理工大学 | High-resolution linear array CCD image observation system |
| CN102729902A (en) * | 2012-07-19 | 2012-10-17 | 西北工业大学 | Embedded panoramic display device and method served for automobile safe driving |
| CN103217592A (en) * | 2012-01-20 | 2013-07-24 | 哈尔滨建成集团有限公司 | Electronic recording system |
| CN103236267A (en) * | 2012-11-09 | 2013-08-07 | 邵继华 | Vehicular integrated system with direct-control multimedia host, external power amplifier and equalizer |
| CN104960474A (en) * | 2015-07-10 | 2015-10-07 | 深圳市美好幸福生活安全系统有限公司 | Non-shielding safety early warning system based on automobile original vehicle system and implementation method of non-shielding safety early warning system |
| CN105843089A (en) * | 2011-08-17 | 2016-08-10 | 秦皇岛天业通联重工科技有限公司 | Method of controlling vehicle terminal |
| CN108020290A (en) * | 2018-01-25 | 2018-05-11 | 上海金盾特种车辆装备有限公司 | A kind of CAN bus controls LED liquid level display screens |
| CN109802983A (en) * | 2017-11-17 | 2019-05-24 | 比亚迪股份有限公司 | The display control method and system of train driving indoor display screen |
-
2002
- 2002-12-23 CN CNA021455465A patent/CN1510651A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603829B (en) * | 2009-06-24 | 2011-05-18 | 北京理工大学 | High-resolution linear array CCD image observation system |
| CN101887702A (en) * | 2010-06-04 | 2010-11-17 | 广州飞歌汽车音响有限公司 | Vehicle-mounted multimedia double-picture display system and method based on FPGA (Field Programmable Gate Array) |
| CN101887702B (en) * | 2010-06-04 | 2013-01-16 | 广州飞歌汽车音响有限公司 | Vehicle-mounted multimedia double-picture display method based on FPGA (Field Programmable Gate Array) |
| CN105843089A (en) * | 2011-08-17 | 2016-08-10 | 秦皇岛天业通联重工科技有限公司 | Method of controlling vehicle terminal |
| CN103217592A (en) * | 2012-01-20 | 2013-07-24 | 哈尔滨建成集团有限公司 | Electronic recording system |
| CN102729902A (en) * | 2012-07-19 | 2012-10-17 | 西北工业大学 | Embedded panoramic display device and method served for automobile safe driving |
| CN102729902B (en) * | 2012-07-19 | 2014-10-15 | 西北工业大学 | Embedded panoramic display device and method served for automobile safe driving |
| CN103236267A (en) * | 2012-11-09 | 2013-08-07 | 邵继华 | Vehicular integrated system with direct-control multimedia host, external power amplifier and equalizer |
| CN104960474A (en) * | 2015-07-10 | 2015-10-07 | 深圳市美好幸福生活安全系统有限公司 | Non-shielding safety early warning system based on automobile original vehicle system and implementation method of non-shielding safety early warning system |
| CN109802983A (en) * | 2017-11-17 | 2019-05-24 | 比亚迪股份有限公司 | The display control method and system of train driving indoor display screen |
| CN108020290A (en) * | 2018-01-25 | 2018-05-11 | 上海金盾特种车辆装备有限公司 | A kind of CAN bus controls LED liquid level display screens |
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