CN202014333U - Car backing assist system based on video character superimposing technology - Google Patents
Car backing assist system based on video character superimposing technology Download PDFInfo
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- CN202014333U CN202014333U CN2011200118429U CN201120011842U CN202014333U CN 202014333 U CN202014333 U CN 202014333U CN 2011200118429 U CN2011200118429 U CN 2011200118429U CN 201120011842 U CN201120011842 U CN 201120011842U CN 202014333 U CN202014333 U CN 202014333U
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Abstract
The utility model provides a car backing assist system based on video character superimposing technology, comprising a video character superimposing module, an ultrasonic ranging module, a temperature measuring acquisition module and a single chip microcomputer control processing module. The ultrasonic ranging module and the temperature measuring acquisition module are both connected with the single chip microcomputer control processing module, and the single chip microcomputer control processing module displays acquired data via the video character superimposing module. Based on the video character superimposing module and other hardware technology, the system realizes the functional effect that multiple parameters are displayed on one screen, thus the system is convenient for a driver to timely fully grasp information and to improve car backing safety.
Description
[technical field]
The utility model relates to automobile video monitoring technique field, particularly a kind of reversing aid system based on the video character superimposing technique.
[background technology]
1, the general introduction of relevant video character superimposing technique.
Video and graphic character superimposing technique is one of application of video signal digital treatment technology, and three phases has been experienced in its development:
(1) " diagram shows control " is the GDC stage.
The GDC stage is to utilize the middle and small scale digital integrated circuit to realize the sequential relationship of the desired strictness of each several part, and the character signal that forms and vision signal is fastened in the preset time pass mix and be presented on the screen.In this mode, the generation of character data has two kinds of ways:
The special character chip: it is a kind of with character or digital read-only memory (ROM) chip of preserving in the mode of dot matrix, and after control circuit was chosen certain ROM address, it just can export corresponding data-signal.Common chip has MK36000, MCM6670P, 8678, MN1217A etc.In this manner, in case selected certain device for use, shown character has also just been determined, lacks flexibility, and can not display graphics, claims that usually this is " text mode ".
Programmable chip: can electric programmable memory (EPROM) chip.In this manner, the dot array data that the designer can show is written to EPROM by programmable device.This mode is very flexible, both can show various characters, but also display graphics, so this mode also is " graphics mode ".
(2) the CRT controller stage.
The CRT controller is a kind of monitor special chip, and it makes circuit greatly simplify the circuit integration that the middle and small scale integrated device in the GDC mode constitutes, thereby use is comparatively convenient.Common chip have 8350,8275 and MC6845 etc.In this stage, the data of character (or figure) still are stored among periphery ROM or the RAM with dot matrix way.
(3) monolithic " screen display " is the OSD stage.
Monolithic OSD (On Screen Display, screen display) chip designs for this series products of domestic TV, and it is integrated into the ROM/RAM of CRT controller and storage character (figure) dot matrix in the monolithic integrated circuit, and communication and the control interface of MCU are provided.Common chip has μ PD 6450/60 series of NEC Corporation, the MSM6237 of OKI company and the MB90092 of FUJITSU company etc.This class device periphery circuit is simplified more, and because the digital control circuit of standard is provided, provides bigger flexibility to the designer, and production cost also reduces greatly, thereby has obtained using widely.
Common Chinese Character Overlap Machine for Dynamic Video scheme:
The 1st kind of scheme is general middle small scale integrated circuit implementation.Promptly all adopt general middle and small scale sequential integrated circuit such as gate, counter, shift register to realize the stack of single channel scale character set time.
The 2nd kind of scheme is based on the multichannel implementation of FPGA (field programmable gate array).Promptly under the prerequisite of shared a slice CPU, character generator ROM and real-time clock, utilize independently display random access memory counting scanning circuit of the integrated several of FPGA, realize the character stack of multichannel time.
The 3rd kind of scheme is based on the implementation of AT 90S1200 single-chip microcomputer.Can adopt 8951 single-chip microcomputers to make main control computer, some AT90S1200 single-chip microcomputers utilize the self-defined a kind of serial communication protocol of I/O mouth pin of AT90S1200 as showing the execution machine, realize the stack of multichannel character.
The 4th kind of scheme is based on the implementation of special character stack special chip, as the special character stack family chip (as upd6450, upd6453 etc.) of Japanese NEC Corporation release, the KS5514B-XX family chip that Korea S Samsung releases, the character overlap chip SD01C01 of Shanghai Volkswagen's core Microtronics A/S development and the MB9009X of Fujitsu etc., adopt the 89S5X single-chip microcomputer as host computer, can realize adjusting functions such as character display position, background color setting, size control.
Scheme compares, and wherein the 1st kind of scheme circuit is comparatively complicated, only is applicable to the single channel design, and character display is limited on screen at every turn, and screen had and flashes when character refreshed, and along with the development of special chip and singlechip technology, this scheme can be eliminated gradually.The 2nd kind of scheme principle and the 1st kind are similar, just utilize programmable logic device to make circuit reduction many, owing to adopt FPGA, also are subjected to the restriction of price.The 3rd kind of scheme utilizes software to realize the function of hardware scanning circuit, relatively flexibly, but only is applicable to the occasion that character display is less relatively, if character display is a lot, software is just too complicated, is difficult to guarantee to show continuously, adopts multi-disc processor cost height.The 4th kind of scheme function based on the special character chip superposed is very strong, is applicable to the occasion that character display is more, by suitable circuit design its versatility and real-time is improved.
2, the general introduction of the vehicle-mounted monitoring system of relevant visual range finding radar for backing car.
Safe servicing unit when backing system is automobile parking or reversing, by sound or more intuitively display unit inform the situation of driver's peripheral obstacle, having removed the driver parks, moves backward and visit caused puzzlement when starting vehicle all around, and help the driver to clear away the defective of blind area and blurred vision, improve the fail safe of driving.Usually, radar for backing car is made up of ultrasonic sensor (being commonly called as probe), controller and display parts such as (or buzzers) usually.Radar for backing car generally adopts the ultrasonic ranging principle, under the control of controller, by the sensor emission ultrasonic signal, when running into barrier, produce echo-signal, transducer receives that via controller carries out data processing after the echo-signal, judges the position of barrier, by the display range of a signal and send other alarm signals, in time warned, thereby can be understood the situation of motor vehicle environment when the driver is moveed backward in real time, making reversing become lighter.In the time in several years, along with the variation of technical development and user's request, radar for backing car has passed through the roughly development in six generations.
The first generation: remind by loudspeaker during reversing." reversing please notes "! I believe that many people also remember this sound, the first generation product of Here it is radar for backing car has only the fraction commercial car using now.As long as the driver hangs up reverse gear, it will sound, and the people around reminding notes.In a sense, it does not directly help the driver, is not real radar for backing car.Low price belongs to obsolete product substantially.
The second generation: adopt buzzer alternative sounds prompting driver.This is really beginning of reverse radar system.During reversing, if there is barrier at 1.8 meters-1.5 meters behind the car, buzzer will be started working.Buzzer is anxious more, and the expression vehicle is near more from barrier.But do not have voice suggestion, do not have distance display yet, barrier is arranged, can not determine that how far barrier has from car, helps not quite the driver though the driver knows.
The third generation: digital band shows concrete distance or distance range.In this,, product was more a lot of than second generation progress in generation, can show the distance of car and obstruction from car body.If object begins to show at 1.8 meters; If the people, the distance about 0.9 meter begins to show.This generation product has two kinds of display modes, digital demonstration product range of a signal numeral, and wave band demonstration product is distinguished by three kinds of colors: the green safe distance of representing, yellow are represented warning distance, and the red represents danger distance must stop reversing.Third generation product is in the same place with band combination digital, but practical, but is installed in the car not too attractive in appearance.
In the 4th generation: the liquid crystal fluorescent screen dynamically shows.This generation product has a qualitative leap, particularly screen display to begin to occur dynamic display system.Need not hang reverse gear, as long as start up the car, will occur the distance of automobile pattern and vehicle periphery barrier on the display, color is clear beautiful, and is specious, can directly stick on the panel board, installs easily.Though but the LCD outward appearance is exquisite, sensitivity is higher, and antijamming capability is not strong, so wrong report is also more.
The 5th generation: magic mirror radar for backing car.Combine the advantage of earlier generations product, adopted up-to-date bionical ultrasonic radar technology, be equipped with high-speed electronic calculator control, can round-the-clockly predict 2 meters exactly with interior barrier, and with the auditory tone cues of different brackets and display alarm driver intuitively.The magic mirror radar for backing car can combine multinomial functions such as rearview mirror, radar for backing car, hands-free phone, temperature demonstration and in-vehicle air pollution demonstration, and has designed phonetic function.Because its profile is exactly a side mirror,, be directly installed on the position of room mirror so interior space can not taken.And a color great variety of models, can be according to demands of individuals and upholstery apolegamy.
The 6th generation: integrate audio-video system.It the 5th generation product the basis on increased a lot of functions newly, belong to the 6th generation product, be to produce for high-grade car specially.On outward appearance, this cover system is than the more exquisite elegance of the 5th generation product; On function, it except possess the 5th generation product all functions, also integrated the audio-video system that high-grade car possesses, can on display, watch the DVD image.
The radar for backing car brand is nearly twenties kinds in the market, and price does not wait for thousand yuan from units to one or two up to a hundred, and the consumer mainly considers from aspects such as function, performance, outward appearance, quality, installation, prices when choosing backing system.
But existing reversing aid system product only concentrates on two kinds of radar for backing car and reverse images, not the function of integrated with distance measurement, rearview mirror picture and character stack.When the user moveed backward, operation was still inconvenient like this.
[utility model content]
The technical problems to be solved in the utility model is to provide a kind of reversing aid system based on the video character superimposing technique, has realized the functional effect of " screen shows many ginsengs ", makes things convenient for the timely grasp information comprehensively of driver, improves the reversing fail safe.
The utility model is achieved in that a kind of reversing aid system based on the video character superimposing technique, comprises video character laminating module, ultrasonic distance measuring module, temperature survey acquisition module, Single-chip Controlling processing module; Described ultrasonic distance measuring module all is connected with described Single-chip Controlling processing module with the temperature survey acquisition module; Described Single-chip Controlling processing module is carried out video data with the data of its collection by described video character laminating module and is shown.
Wherein said Single-chip Controlling processing module also is integrated with and is used for the loud speaker that measuring distance is reported to the police.
Wherein said video character laminating module specifically comprises: video input processing unit, video output processing unit, synchronous signal separation unit, the character superpositing unit with MB90092 process chip, Hanzi font library unit; Described video input processing unit is connected with described character superpositing unit through synchronous signal separation unit; Described character superpositing unit obtains required Chinese character by described Hanzi font library unit; Described character superpositing unit also is connected with video output processing unit.
Wherein the Hanzi font library unit is the flash memory that stores Chinese character.
Wherein said video input processing unit all is connected with display screen with described video output processing unit.
Usefulness of the present utility model is: range finding that 1, this reversing aid system is integrated, rearview mirror picture and three functions of character stack are in one, have reached video and various important information and have been superimposed upon effect on the display screen, stability of a system height in real time; 2, this reversing aid system has adopted the multi-point temp acquisition technique based on Single Wire Bus Technology, utilizes temperature-compensating and software filtering algorithm to improve range accuracy on range finder module; 3, this reversing aid system with reversing automobile related data flow digitized processing after, the vision signal that produces with the rearview mirror picture demonstration that superposes in real time, eliminate radar for backing car and do not had the disadvantage that mirror image and reverse image do not have precise figures, eliminated and blindly judged the accident potential that causes, make things convenient for the in time comprehensive grasp information of driver, improve the reversing fail safe; 4, this reversing aid system is practical, and has advantages such as data are reliable, accuracy is high, moderate cost, has very high popularization practical value, the application prospect optimism.
[description of drawings]
Fig. 1 is the utility model system configuration schematic diagram.
Fig. 2 is the utility model video character laminating module structural representation.
[embodiment]
With reference to shown in Figure 1, a kind of reversing aid system based on the video character superimposing technique comprises video character laminating module 1, ultrasonic distance measuring module 2, temperature survey acquisition module 3, Single-chip Controlling processing module 4; Described ultrasonic distance measuring module 2 all is connected with described Single-chip Controlling processing module 4 with temperature survey acquisition module 3; Described Single-chip Controlling processing module 4 is carried out video data with the data of its collection by described video character laminating module 1 and is shown; Described Single-chip Controlling processing module 4 also is integrated with and is used for the loud speaker 5 that measuring distance is reported to the police.
As shown in Figure 2, described video character laminating module 1 specifically comprises: video input processing unit 10, video output processing unit 11, synchronous signal separation unit 12, the character superpositing unit 13 with MB90092 process chip, Hanzi font library unit 14; Described video input processing unit 10 is connected with described character superpositing unit 13 through synchronous signal separation unit 12; Described character superpositing unit 13 obtains required Chinese character by described Hanzi font library unit 14; Described character superpositing unit 13 also is connected with video output processing unit 11; Described Hanzi font library unit 14 is the flash memories that store Chinese character.
Wherein said video input processing unit 10 all is connected with display screen 6 with described video output processing unit 11.
Wherein the video input processing unit 10: be that video input signals is done processing and amplifying, select OPA2354 high-frequency high-speed amplifier for use.
Video output processing unit 11: be the output that is used to do emitter follower, guarantee the output quality of signal.
Synchronous signal separation unit 12: be to isolate line synchronizing signal from the vision signal of video input processing unit 10 inputs, line synchronizing signal is delayed, and broadening is handled the back and is formed field sync signal; This signal has determined the horizontal level of character on indicator screen to the time of delay of horizontal synchronizing pulse, and the field synchronization width determines the overall width of character on screen; This module is mainly used the capable field of the higher LM1881 of integrated level separator.
Character superpositing unit 13: form by a slice vision signal process chip MB90092 and peripheral circuit (not shown), it is serially connected with in the path of video signal source input and output, receive the superposing control order of Single-chip Controlling processing module 4, the character information that show is added in the video information; And character is mainly provided by Hanzi font library unit 14.
Hanzi font library unit 14: be to adopt FLASH memory AM27C040 to be used to store character data.
Ultrasonic distance measuring module 2: form by power supply, ultrasonic resonator frequency modulate circuit, echo receiving processing circuit; Wherein, ultrasonic resonator frequency modulate circuit mainly utilizes CD4049 that the 40kHz frequency signal of single-chip microcomputer output is nursed one's health, and makes ultrasonic sensor produce resonance, launches this signal at transmitting terminal; The echo receiving processing circuit, main detection of echoes signal reads the numerical value in the counter, the treated distance measurement value that obtains a time.
Temperature survey acquisition module 3: be used to improve precision of ultrasonic ranging, adopt DS18B20 directly to be connected, carry out the collection of ambient temperature with single-chip microcomputer.
Single-chip Controlling processing module 4: form by singlechip CPU and peripheral circuit (not shown); It is whole system " command centre ", and each module cooperative work in the control system is to realize the various functions of system; Adopt 16 single-chip microcomputer SPCE061A at this, use the SPCE061A single-chip microcomputer, one is to use conveniently, needn't expand too much peripheral components, has saved a large amount of hardware development debugging work; The 2nd, the reliability of system, the anti-interference ability significantly improves; The 3rd, peripheral components reduces, and cost reduces greatly; The 4th, the supply voltage of single-chip microcomputer can fall very lowly, and electric current can be less, reduces system power dissipation greatly, conveniently uses in automobile.
Loud speaker 5: be used for measuring distance and report to the police.
Operation principle of the present utility model: the wide-angle imaging head (by the reversing lamp supply power) at middle part behind the input termination car of the video input processing unit of native system, the environment behind its camera head monitor car; The acquisition probe of temperature survey acquisition module connects outside the car body; The range finding probe of ultrasonic distance measuring module is connected on four positions of car rear bumper arm.After starting the native system device, the Single-chip Controlling processing module is carried out initialization operation, the temperature signal that the temperature survey acquisition module collects is directly handled through the storage of Single-chip Controlling processing module and by the video character laminating module, on display screen, shown the temperature information outside front truck.When the user hangs into reverse gear shift, the vision signal of camera enters the Single-chip Controlling processing module, the Single-chip Controlling processing module is measured the distance of vehicle body and barrier by ultrasonic distance measuring module simultaneously, and play corresponding alarm sound by loud speaker, and outputed to after this moment, the video character laminating module superposeed ranging data and real time video signals in the LCDs in the car, so that the driver checks.Wherein Ce Ju data refresh once for 2 seconds.
What deserves to be mentioned is: at the car rear bumper four ultrasonic ranging probes and a wide-angle imaging head are installed before the utility model uses, are furnished with a LCDs in the car.Behind the automobile starting, open system.When automobile is in the reversing state and knocks into the back state, can provide various different alarm sounds according to different situations.Automobile also can apply to the broadcast of DVD/VCD video display or the platform program etc. that televiews.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (5)
1. the reversing aid system based on the video character superimposing technique is characterized in that: comprise video character laminating module, ultrasonic distance measuring module, temperature survey acquisition module, Single-chip Controlling processing module; Described ultrasonic distance measuring module all is connected with described Single-chip Controlling processing module with the temperature survey acquisition module; Described Single-chip Controlling processing module is carried out video data with the data of its collection by described video character laminating module and is shown.
2. a kind of reversing aid system based on the video character superimposing technique according to claim 1 is characterized in that: described Single-chip Controlling processing module also is integrated with and is used for the loud speaker that measuring distance is reported to the police.
3. a kind of reversing aid system based on the video character superimposing technique according to claim 1 is characterized in that: described video character laminating module specifically comprises: video input processing unit, video output processing unit, synchronous signal separation unit, the character superpositing unit with MB90092 process chip, Hanzi font library unit; Described video input processing unit is connected with described character superpositing unit through synchronous signal separation unit; Described character superpositing unit obtains required Chinese character by described Hanzi font library unit; Described character superpositing unit also is connected with video output processing unit.
4. a kind of reversing aid system based on the video character superimposing technique according to claim 3 is characterized in that: the Hanzi font library unit is the flash memory that stores Chinese character.
5. a kind of reversing aid system based on the video character superimposing technique according to claim 3 is characterized in that: described video input processing unit all is connected with display screen with described video output processing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200118429U CN202014333U (en) | 2011-01-14 | 2011-01-14 | Car backing assist system based on video character superimposing technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200118429U CN202014333U (en) | 2011-01-14 | 2011-01-14 | Car backing assist system based on video character superimposing technology |
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| CN202014333U true CN202014333U (en) | 2011-10-19 |
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| CN2011200118429U Expired - Fee Related CN202014333U (en) | 2011-01-14 | 2011-01-14 | Car backing assist system based on video character superimposing technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289236A (en) * | 2011-07-21 | 2011-12-21 | 戴明 | temperature and humidity control system based on ZIGBEE and dynamic video generator |
| CN103873821A (en) * | 2012-12-17 | 2014-06-18 | 核动力运行研究所 | Overlapping device of closed-circuit television video check characters and using method thereof |
-
2011
- 2011-01-14 CN CN2011200118429U patent/CN202014333U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102289236A (en) * | 2011-07-21 | 2011-12-21 | 戴明 | temperature and humidity control system based on ZIGBEE and dynamic video generator |
| CN103873821A (en) * | 2012-12-17 | 2014-06-18 | 核动力运行研究所 | Overlapping device of closed-circuit television video check characters and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20140114 |