CN104199035A - Vehicle-mounted visible reversing sensor warning system - Google Patents
Vehicle-mounted visible reversing sensor warning system Download PDFInfo
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- CN104199035A CN104199035A CN201410336516.3A CN201410336516A CN104199035A CN 104199035 A CN104199035 A CN 104199035A CN 201410336516 A CN201410336516 A CN 201410336516A CN 104199035 A CN104199035 A CN 104199035A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/86—Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/806—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for aiding parking
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention discloses a vehicle-mounted visible reversing sensor warning system and belongs to the technical field of ultrasonic ranging. The vehicle-mounted visible reversing sensor warning system aims at solving the problems that the existing automotive reversing obstacle detection product is high in cost, low in intelligence degree, complex in design, solidified in function and the like. The vehicle-mounted visible reversing sensor warning system comprises an ultrasonic ranging module, a control MCU (Microprogrammed Control Unit), a voice warning module, a display module and a rear view camera module; the ultrasonic ranging module is used for detecting the ranging information of a vehicle and an obstacle; a ranging information output end of the ultrasonic ranging module is connected with a ranging information input end of the control MCU; a video information output end of the rear view camera module is connected with a video information input end of the control MCU; a voice broadcast command output end of the control MCU is connected with a voice broadcast command input end of the voice warning module; a video and ranging information compound information output end of the control MCU is connected with a video and ranging information compound information input end of the display module.
Description
Technical field
The present invention relates to reversing automobile device, belong to ultrasonic measuring distance technology field.
Background technology
At present, China Automobile Industry is rapid, and the volume of production and marketing of automobile is growing.But along with the high speed development of automobile industry, especially in recent years, the quantity of automobile increased year by year, caused highway, street, parking lot, garage etc. more and more crowded.Driver is citing security concerns more and more, and one of them typical case is exactly reversing, and the problem producing due to reversing also becomes increasingly conspicuous.
The quantity of automobile increases year by year on the one hand, and highway, street, parking lot and garage are crowded to capacity, and rotating space is fewer and feweri; On the other hand, fresh driver and non-full-time driver are more and more, and more and more because of the dispute that reversing causes, the collision between vehicle, between the barrier such as vehicle and people, vehicle and wall happens occasionally.Move backward oneself become make us the task of having a headache, even veteran driver is also the thing that part is taken great energy in complaint reversing.According to statistics, during dangerous circumstances, if can give the pretreatment time of driver's half second, can reduce respectively 30% of rear-end collision, 50% of the relevant accident in road surface, 60% of the car accident that heads on.The awkward situation that improving moves backward runs into is paid close attention to by increasing people, people have higher requirement to the convenience of automobile operation, wish kind of device and can solve the inconvenience that reversing automobile brings to people, eliminate the unsafe factor in driving, car can be docked to rapidly and accurately to the position of appointment.
The difficulty existing in reversing automobile, the first cannot be understood the particularly environment at rear of automobile surrounding completely because driver is sitting on driver's seat.Driver can only observe rear obstacle by rearview mirror, and rearview mirror is because of the restriction of its position, and the visual field is too little, poor definition, cannot reach the object of backsight in reversing at all.Its two be when reversing driver must to take into account the situation of vehicle front, both sides simultaneously, need twisting to look back at the situation of vehicle back, physical and mental consumption is too many, easily occurs dangerous situation.Its three, reversing is a complicated process, it depends on driver's the experience of driving, the skill of driving and reaction sensitivity, any one link goes wrong, driver cannot complete reversing task rapidly and accurately.
Problem for solving the reversing difficulty of automobile, has two kinds of thinkings at present: the one, place hope on the increasingly mature of automatic driving technology and auxiliary facility thereof, and this technology, still in the development starting stage, still can not be promoted the use of in a short time at present; The secondth, adopt simple reversing automobile early warning system, but the function of traditional reversing automobile early warning system is relatively simple, driver still needs to go to judge the situation after car by rearview mirror, the distance that estimates automobile and car and obstruction completes reversing task.
Automotive electronics is considered to the developing revolution of automotive engineering, by equip various electronic equipments on automobile, can make the performance of automobile further improve.The automotive electronics industry of China is weak, and still there is a big difference with developed country, needs further to strengthen research and drops into.Vehicular visual radar for backing car early warning system, that ultrasonic ranging and TFT_LCD are shielded to the research that video character Overlapping display technology is applied to automotive electronics, there is higher practical significance, can generally be applied in the intelligent degree that improves automobile in domestic automobile, reduce the accident due to the bad generation of vehicle backing backsight.
By the utilization to reversing radar of vehicle early warning system, driver's muscle power, brainwork intensity can greatly be alleviated, reversing difficulty can reduce, a little less than avoiding driver because of sense of direction, the accident that causes of judgement and misoperation, it is to improving vehicle intellectualized level and finally realizing that automobile is unmanned a positive meaning simultaneously.
Summary of the invention
The present invention seeks to, in order to solve the problems such as high, the intelligent degree of existing reversing automobile obstacle detection cost of products is low, design is complicated, function is solidified, provides a kind of Vehicular visual radar for backing car early warning system based on ultrasonic measuring distance technology.
Vehicular visual radar for backing car early warning system of the present invention, it comprises ultrasound measurement module, controls MCU, audio alert module, display module and backsight photographing module;
Ultrasound measurement module is for detection of the ranging information of Ben Che and barrier, and the ranging information output terminal of ultrasound measurement module is connected with the ranging information input end of controlling MCU;
The video information output terminal of backsight photographing module is connected with the video information input end of controlling MCU;
Controlling the voice broadcast instruction output end of MCU and the voice broadcast instruction input end of audio alert module is connected;
Video and the ranging information composite signal output terminal of controlling MCU are connected with video and the ranging information composite signal input end of display module.
Advantage of the present invention: the present invention adopts ultrasonic technology transmitting and receiving data, two MCU process, and intelligent degree is high.Meanwhile, the present invention adopts voice module and video display module, and driver moves backward very convenient.The present invention compares with existing obstacle detection product, has cost low, and intelligent degree is high, simplicity of design, the advantage of functional diversities.
Accompanying drawing explanation
Fig. 1 is the theory diagram of Vehicular visual radar for backing car early warning system of the present invention.
Embodiment
Embodiment one: below in conjunction with Fig. 1, present embodiment is described, Vehicular visual radar for backing car early warning system described in present embodiment, it comprises ultrasound measurement module 1, controls MCU2, audio alert module 3, display module 4 and backsight photographing module 5;
Ultrasound measurement module 1 is for detection of the ranging information of Ben Che and barrier, and the ranging information output terminal of ultrasound measurement module 1 is connected with the ranging information input end of controlling MCU2;
The video information output terminal of backsight photographing module 5 is connected with the video information input end of controlling MCU2;
Controlling the voice broadcast instruction output end of MCU2 and the voice broadcast instruction input end of audio alert module 3 is connected;
Video and the ranging information composite signal output terminal of controlling MCU2 are connected with video and the ranging information composite signal input end of display module 4.
Ultrasonic distance measuring module 1 sends to ranging information to control MCU2, has two MCU, and one is radar host computer, and one is radar slave.By ultrasonic probe 1-1, ultrasonic signal is sent to ultrasonic ranging MCU1-3, through processing, distance signal sends to controls MCU2, control MCU2 and on the one hand data-signal is transferred to LCD controller 4-1, controlling on the one hand voice IC2-1 selects one section of voice to allow loudspeaker 3-3 report distance by power discharging IC 3-2, reversing phonetic warning is stored in voice IC3-1, by controlling MCU2 OPADD, in voice IC3-1, search the corresponding phonetic warning signal that needs output, export to power discharging IC 3-2, carry out voice amplification.
Backsight photographing module 5 is delivered to LCD driver 4-2 by backsight photographed images video data transmitting, control MCU2 ranging information is sent to LCD controller 4-1, LCD controller 4-1 controls LCD driver 4-2 by drive TFT _ LCD screen 4-3 demonstration backsight photographed images and obstacle distance information after backsight video and the stack of range finding character.
Software systems of the present invention are comprised of two parts, find range software and Control System Software.Range finding software is embedded in range finding MCU1-3 the inside, completes ultrasonic ranging function; MCU2 the inside is controlled in Control System Software embedding, completes the function of controlling tail video superimpose demonstration after audio alert and range finding character and car.
Embodiment two: present embodiment is described further embodiment one, ultrasound measurement module 1 comprises one group of ultrasonic probe 1-1, transmitting-receiving control circuit 1-2 and range finding MCU1-3; Each ultrasonic probe 1-1 is all connected with the ultrasound signal transmission end of transmitting-receiving control circuit 1-2, transceiving data information output two-way time of transmitting-receiving control circuit 1-2 is connected with transceiving data information input terminal two-way time of range finding MCU1-3, and the range finding distance measuring signal output terminal of MCU1-3 and the ranging information input end of MCU2 are connected.
Embodiment three: present embodiment is described further embodiment one or two, audio alert module 3 comprises voice IC3-1, power discharging IC 3-2 and loudspeaker 3-3; The voice broadcast instruction input end of voice IC3-1 is connected with the voice broadcast instruction output end of controlling MCU2, and the voice broadcast instruction output end of voice IC3-1 is connected with the input end of power discharging IC 3-2, and the output terminal of power discharging IC 3-2 is connected with the Enable Pin of loudspeaker 3-3.
Embodiment four: present embodiment is described further embodiment one, two or three, display module 4 comprises LCD controller 4-1, LCD driver 4-2 and TFT_LCD screen 4-3; The video of LCD controller 4-1 and ranging information composite signal input end are connected with video and the ranging information composite signal output terminal of controlling MCU2, the output terminal of LCD controller 4-1 is connected with the input end of LCD driver 4-2, and the output terminal of LCD driver 4-2 is connected with the Enable Pin of TFT_LCD screen 4-3.
Embodiment five: present embodiment is described further embodiment one, two, three or four, it is critical piece that backsight photographing module 5 adopts camera.
Embodiment six: present embodiment is described further embodiment one, two, three, four or five, the quantity of ultrasonic probe 1-1 is 4.
Because this system is contained on automobile, use,, there is many interference in work under bad environment, is summed up, and mainly contains that power supply noise, transmission line disturb, signal misfortune is closed, tetra-aspects of electromagnetic interference (EMI) EMI.During wiring, will take measures, get rid of these and disturb, to guarantee that system works is stable, range finding accurately.
The vision signal that camera actual photographed arrives, in TFT_LCD screen display, is superimposed with ranging information in video.The testee of selecting in experiment is car model, at normal temperatures, respectively car model is carried out to actual measurement measurement result as shown in table l from each distance segment of 0.15 meter-3.05 meters of ultrasonic sensors.
Obviously, suppose the aftershock time of considering lms, the shortest obstacle distance that native system can detect is 340 * 0.001/2=0.17 rice, and the work period of each road 14ms, the longest obstacle distance that the system that determined can detect is 340 * 0.014/2=2.4 rice;
After considering the real-time and practicality of native system, we set on software: record distance and be less than 0.4 meter, with 0.4 meter of output, report to the police; Record distance and be greater than 2.4 meters, do that distance is infinitely great to be processed.
Table 1 range finding experimental result
As seen from Table 1, the laboratory of doing is successful, data are more stable, have certain repeatability, because the reversing automobile speed of a motor vehicle is very slow, range accuracy requires not need very high, the degree of accuracy of native system is 0.01 meter, from table test result can find out, design test specification in, the measuring accuracy of each test point meets the demands.
Startup system, system camera starts to take, by tail image after car and range data Overlapping display.
At sector screen, be specifically shown as: the whole tailstock backsight shooting scene that shows of LCD screen, if probe has fault, below, screen the inside shows " L, CL, CR, R ", respectively corresponding four probes.If probe does not have fault, screen the inside top shows in four probes the shortest range finding distance in obstacle distance, four round dots in below show finding range according to color, round dot color is specifically shown as: different regions will have different semi-transparent colors to represent, that 2.59 meters～1.50 meter Wei Yu police regions show is green, 1.49 meters～0.80 meter for slow-drivezone show yellow, 0.79 meter～0.4 meter for security area demonstration redness, be less than 0.4 meter Wei Jiting district, system will point out driver to stop, and be shown as " P ".
At obstacle distance, be greater than in 0.4 meter, just adjust the distance and report, when distance is less than or equal to 0.4 meter, start to send audio alert, " stop! Stop! ", realized the function of phonetic warning module.
Claims (6)
1. Vehicular visual radar for backing car early warning system, is characterized in that, it comprises ultrasound measurement module (1), controls MCU (2), audio alert module (3), display module (4) and backsight photographing module (5);
Ultrasound measurement module (1) is for detection of the ranging information of Ben Che and barrier, and the ranging information output terminal of ultrasound measurement module (1) is connected with the ranging information input end of controlling MCU (2);
The video information output terminal of backsight photographing module (5) is connected with the video information input end of controlling MCU (2);
The voice broadcast instruction output end of controlling MCU (2) is connected with the voice broadcast instruction input end of audio alert module (3);
Video and the ranging information composite signal output terminal of controlling MCU (2) are connected with video and the ranging information composite signal input end of display module (4).
2. Vehicular visual radar for backing car early warning system according to claim 1, is characterized in that, ultrasound measurement module (1) comprises one group of ultrasonic probe (1-1), transmitting-receiving control circuit (1-2) and the MCU (1-3) that finds range; Each ultrasonic probe (1-1) is all connected with the ultrasound signal transmission end of transmitting-receiving control circuit (1-2), transceiving data information output two-way time of transmitting-receiving control circuit (1-2) is connected with transceiving data information input terminal two-way time of range finding MCU (1-3), and the distance measuring signal output terminal of range finding MCU (1-3) is connected with the ranging information input end of MCU2.
3. Vehicular visual radar for backing car early warning system according to claim 1, is characterized in that, audio alert module (3) comprises voice IC (3-1), power discharging IC (3-2) and loudspeaker (3-3); The voice broadcast instruction input end of voice IC (3-1) is connected with the voice broadcast instruction output end of controlling MCU (2), the voice broadcast instruction output end of voice IC (3-1) is connected with the input end of power discharging IC (3-2), and the output terminal of power discharging IC (3-2) is connected with the Enable Pin of loudspeaker (3-3).
4. Vehicular visual radar for backing car early warning system according to claim 1, is characterized in that, display module (4) comprises LCD controller (4-1), LCD driver (4-2) and TFT_LCD screen (4-3); The video of LCD controller (4-1) and ranging information composite signal input end are connected with video and the ranging information composite signal output terminal of controlling MCU (2), the output terminal of LCD controller (4-1) is connected with the input end of LCD driver (4-2), and the output terminal of LCD driver (4-2) is connected with the Enable Pin of TFT_LCD screen (4-3).
5. Vehicular visual radar for backing car early warning system according to claim 1, is characterized in that, it is critical piece that backsight photographing module (5) adopts camera.
6. Vehicular visual radar for backing car early warning system according to claim 1, is characterized in that, the quantity of ultrasonic probe (1-1) is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410336516.3A CN104199035A (en) | 2014-07-15 | 2014-07-15 | Vehicle-mounted visible reversing sensor warning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410336516.3A CN104199035A (en) | 2014-07-15 | 2014-07-15 | Vehicle-mounted visible reversing sensor warning system |
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| CN104199035A true CN104199035A (en) | 2014-12-10 |
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| CN201410336516.3A Pending CN104199035A (en) | 2014-07-15 | 2014-07-15 | Vehicle-mounted visible reversing sensor warning system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017128439A1 (en) * | 2016-01-31 | 2017-08-03 | 冯旋宇 | Method and system for detecting distance of vehicle to object |
| CN107444129A (en) * | 2017-09-13 | 2017-12-08 | 洛阳大河新能源车辆有限公司 | A kind of operating method of electric car reverse anti-collision system |
| CN107469238A (en) * | 2017-07-20 | 2017-12-15 | 山东新华医疗器械股份有限公司 | Medical computerized linear accelerator anticollision system and control method |
| CN108426567A (en) * | 2018-03-22 | 2018-08-21 | 西安闻泰电子科技有限公司 | Subject is apart from display methods, apparatus and system |
| CN108944680A (en) * | 2018-05-21 | 2018-12-07 | 苏州工业园区职业技术学院 | A kind of radar auxiliary driving system based on viewing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216560A (en) * | 2008-01-02 | 2008-07-09 | 凌子龙 | Intelligent reversing parking radar |
| CN201272310Y (en) * | 2008-08-29 | 2009-07-15 | 深圳市翰乾电子科技有限公司 | Visual reverse system apparatus with video play function |
| CN201272308Y (en) * | 2008-08-29 | 2009-07-15 | 深圳市翰乾电子科技有限公司 | Multifunctional visual reverse system apparatus |
-
2014
- 2014-07-15 CN CN201410336516.3A patent/CN104199035A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216560A (en) * | 2008-01-02 | 2008-07-09 | 凌子龙 | Intelligent reversing parking radar |
| CN201272310Y (en) * | 2008-08-29 | 2009-07-15 | 深圳市翰乾电子科技有限公司 | Visual reverse system apparatus with video play function |
| CN201272308Y (en) * | 2008-08-29 | 2009-07-15 | 深圳市翰乾电子科技有限公司 | Multifunctional visual reverse system apparatus |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017128439A1 (en) * | 2016-01-31 | 2017-08-03 | 冯旋宇 | Method and system for detecting distance of vehicle to object |
| CN107469238A (en) * | 2017-07-20 | 2017-12-15 | 山东新华医疗器械股份有限公司 | Medical computerized linear accelerator anticollision system and control method |
| CN107469238B (en) * | 2017-07-20 | 2019-11-22 | 山东新华医疗器械股份有限公司 | Medical computerized linear accelerator anticollision system and control method |
| CN107444129A (en) * | 2017-09-13 | 2017-12-08 | 洛阳大河新能源车辆有限公司 | A kind of operating method of electric car reverse anti-collision system |
| CN108426567A (en) * | 2018-03-22 | 2018-08-21 | 西安闻泰电子科技有限公司 | Subject is apart from display methods, apparatus and system |
| CN108944680A (en) * | 2018-05-21 | 2018-12-07 | 苏州工业园区职业技术学院 | A kind of radar auxiliary driving system based on viewing system |
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Application publication date: 20141210 |