CN110774980A - Rear vehicle distance monitoring system and method during emergency braking of vehicle - Google Patents
Rear vehicle distance monitoring system and method during emergency braking of vehicle Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000010191 image analysis Methods 0.000 claims description 21
- 230000001133 acceleration Effects 0.000 claims description 15
- 238000004458 analytical method Methods 0.000 claims description 12
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- 230000035484 reaction time Effects 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/16—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by evaluating the time-derivative of a measured speed signal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/8066—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for monitoring rearward traffic
Abstract
The invention discloses a rear vehicle distance monitoring system and method during emergency braking of an automobile, relates to the field of vehicle safety, and aims to solve the problem that in the prior art, emergency braking can avoid collision with a front vehicle but can not avoid rear-end accidents. The central control system comprises a vehicle speed detection module, a rear camera image calling module and a central control screen image releasing module. The central control system obtains the real-time speed of the vehicle through the vehicle speed detection module, and when the vehicle brakes suddenly, the central control system calls the real-time image obtained by the camera and puts the image on the central control screen for display. The invention achieves the purposes that the real-time image of the rear vehicle is put on the central control screen during emergency braking, and the alarm sound is given out to prompt the vehicle owner to pay attention to the condition of the rear vehicle so as to take countermeasures.
Description
Technical Field
The invention relates to the technical field of traffic safety, in particular to a rear vehicle distance monitoring system and a rear vehicle distance monitoring method during emergency braking of an automobile.
Background
With the development of the society, families and households have private cars, and more express ways or expressways without traffic lights can appear in the development of cities. When our vehicle is traveling on a road at a relatively high speed, it is inevitable that some emergency situations ahead will be encountered and the vehicle will need to be braked urgently.
The prior art can realize intelligent monitoring of the distance between the vehicle and the front vehicle, and when the warning distance is reached, the vehicle is automatically and suddenly stopped to ensure that the vehicle can be braked and does not collide with the front obstacle. However, we cannot ensure that the rear vehicle can be braked within a short time, and due to the instinctive reaction of people, we can hardly look up the rearview mirror to observe whether the rear vehicle runs rapidly, and if the rear vehicle collides with us, the result is unreasonable.
If can monitor the rear vehicle, to self vehicle say, can hold initiative right in hand, according to actual conditions adjustment vehicle position and angle to greatly reduced traffic accident takes place the probability.
Disclosure of Invention
The invention aims to provide a rear vehicle distance monitoring system and a rear vehicle distance monitoring method during emergency braking of an automobile, which have the effects of monitoring a rear vehicle and reducing the probability of rear-end accidents.
The above object of the present invention is achieved by the following technical solutions:
a rear vehicle distance monitoring system during emergency braking of an automobile comprises a central control system, wherein the central control system is connected with a central control screen and a rear camera for acquiring images behind the automobile and comprises a vehicle speed detection module, a rear camera image calling module and a central control screen image releasing module;
the vehicle speed detection module is used for detecting the current speed of a vehicle in real time, and when the acceleration of the vehicle is greater than or equal to a threshold value within a certain time period and the direction is opposite to the driving direction of the vehicle, automatically triggering the central control system to send an instruction, and calling an image acquired by the rear camera;
the rear camera image calling module sends the real-time image acquired by the rear camera to the central control system under the instruction of the central control system when the vehicle acceleration is greater than or equal to a threshold value;
and the central control screen image releasing module releases the real-time image to the central control screen for display after the central control system acquires the real-time image.
The invention is further configured to: the central control system also comprises an image analysis module and a danger alarm module, wherein the image analysis module is used for carrying out image contrast analysis according to a real-time image acquired by the rear camera, calculating whether a dangerous coming vehicle exists behind and the driving speed of a rear vehicle, and sending a calculation result to the central control system; and the danger alarm module is used for triggering alarm after the central control system judges that a dangerous vehicle comes from the rear according to the calculation result of the image analysis module.
The invention is further configured to: and the danger alarm module is connected with the vehicle-mounted sound box.
The invention is further configured to: the central control screen is connected with an operation module and used for closing a rear camera displayed by the central control screen to obtain a real-time image after a driver manually judges that no danger exists behind the vehicle.
The invention is further configured to: the central control system is further connected with a rear vehicle distance meter and comprises a rear vehicle speed calculating module, when the central control system calls a real-time image acquired by a rear camera, the rear vehicle distance meter transmits data to the central control system, and the rear vehicle speed calculating module calculates the rear vehicle distance and the vehicle speed of the rear vehicle based on the rear vehicle distance meter data.
The invention is further configured to: the rear camera is connected with a storage module.
The second aim of the invention is realized by the following technical scheme:
a rear vehicle distance monitoring method during emergency braking of an automobile is characterized by comprising the following steps:
s1, the central control system acquires the real-time speed of the vehicle through the vehicle speed detection module, and when the acceleration of the vehicle in a certain time period is greater than or equal to a threshold value and the direction of the acceleration is opposite to the driving direction of the vehicle, the central control system calls the real-time image acquired by the camera and projects the image onto a central control screen for display;
s2, the central control camera carries out calculation and analysis on the real-time image acquired by the rear camera through the image analysis module, and information including whether a vehicle comes behind and the speed of the vehicle comes is calculated;
s3, if the central control system calculates that there is no danger behind the vehicle after analysis, the driver judges to control the vehicle by himself, and selects to close the real-time image displayed on the central control screen through the operation module;
s4, if the central control system calculates that there is a danger behind the vehicle after analysis, the vehicle-mounted sound system is made to give an alarm sound by using the danger alarm module;
and S5, the driver takes a corresponding measure according to the real-time image displayed on the central control screen.
The invention is further configured to: when the rear vehicle distance is larger than the preset vehicle distance, the central control system judges that no dangerous vehicle comes; when the rear vehicle distance is smaller than the preset vehicle distance and the rear vehicle speed is smaller than the preset vehicle speed, the vehicle-mounted sound box gives out a first alarm sound, and when the rear vehicle distance is smaller than the preset vehicle distance and the rear vehicle speed is larger than the preset vehicle speed, the vehicle-mounted sound box gives out a second alarm sound.
The invention is further configured to: and when the real-time image acquired by the rear camera is not clear and cannot be subjected to image analysis, the rear vehicle distance and the vehicle speed data calculated by the rear vehicle speed calculating module are called.
In conclusion, the beneficial technical effects of the invention are as follows:
1. through the arrangement of the central control system, the central control screen, the rear camera, the vehicle speed detection module, the rear camera image calling module and the central control screen image releasing module, after the central control system judges that the vehicle is braked emergently through the vehicle speed detection module, the real-time image acquired by the rear camera is called by the rear camera image calling module and is released to the central control screen, so that a driver can know the situation behind the vehicle in time conveniently, the judgment and the operation can be made in time, and the rear-end collision accident can be avoided;
2. through the arrangement of the image analysis module and the danger alarm module, the image analysis is carried out on the image acquired by the rear camera, whether a vehicle exists behind the vehicle or not, the distance between the vehicle and the vehicle speed of the rear vehicle or not is judged, whether safety threat exists or not is judged, and the danger alarm module is triggered based on the judgment to prompt a driver to pay attention to the situation behind the vehicle;
3. through the setting of the vehicle speed calculation module of vehicle behind rear distance meter prediction, the real-time image that shows on well accuse screen is unclear, and when the weather condition was bad, image analysis can't go on smoothly, measures and calculates rear vehicle car distance and speed of a motor vehicle through rear distance meter to the successful acquisition of data has been ensured.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
fig. 2 is an overall flow diagram of an embodiment of the invention.
Detailed Description
Referring to fig. 1, the invention discloses a rear vehicle distance monitoring system during emergency braking of an automobile, which comprises a central control system. The central control system is connected with a central control screen and a rear camera for acquiring images behind the vehicle. The central control screen can display basic information of the vehicle, such as vehicle air conditioner state, sound information, local media, vehicle fuel oil, water temperature and other basic information of the vehicle, and can also control related operations of the vehicle, such as opening or closing of vehicle windows, control of playing of a video-audio system, adjustment of air conditioner temperature and air speed and the like. The central control system comprises a vehicle speed detection module, a rear camera image calling module and a central control screen image releasing module.
The vehicle speed detection module is used for detecting the current speed of the vehicle in real time, and when the acceleration of the vehicle is greater than or equal to a threshold value in a certain time period and the direction of the acceleration is opposite to the driving direction of the vehicle, the vehicle speed detection module automatically triggers the central control system to send an instruction and calls a real-time image acquired by the rear camera. In the present embodiment, the vehicle speed detection module detects the traveling speed of the vehicle every two seconds, and the threshold value is set to 8.33m/s
2I.e. acceleration of the vehicle greater than or equal to 8.33m/s in 2 seconds
2And when the direction of the acceleration is opposite to the driving direction of the vehicle, the vehicle is indicated to be braked emergently, and at the moment, the real-time image acquired by the rear camera is called by the central control system. The rear camera is connected with a storage module. In this embodiment, the storage module is an SD card, and when the vehicle is running normally, the rear camera stores the real-time image in the SD card, but is not called by the central control system.
And the rear camera image calling module sends the real-time image acquired by the rear camera to the central control system under the instruction of the central control system when the vehicle acceleration is greater than or equal to the threshold value.
And the central control screen image releasing module releases the real-time image to the central control screen for display after the central control system acquires the real-time image. The driver makes a judgment through the real-time image, changes the lane or turns to according to the actual road condition, and compared with the automatic scram and automatic steering of the vehicle system in the prior art, the driver has more choices and the field processing is more flexible.
The central control system further comprises an image analysis module and a danger alarm module, wherein the image analysis module is used for carrying out image contrast analysis according to the real-time image acquired by the rear camera, tracking the moving object by adopting an optical flow method, calculating whether a dangerous vehicle comes behind and the driving speed of a rear vehicle, and sending the calculation result to the central control system. And the danger alarm module is used for triggering alarm after the central control system judges that a dangerous vehicle comes from the rear according to the calculation result of the image analysis module. In this embodiment, the hazard warning module is connected with the car audio, and gives an alarm through the car audio. In addition, an external buzzer or an alarm lamp can be connected to the central control system.
The central control screen is connected with an operation module and used for closing a rear camera displayed by the central control screen to obtain a real-time image after a driver manually judges that no danger exists behind the vehicle.
The central control system is further connected with a rear vehicle distance meter and comprises a rear vehicle speed calculating module, when the central control system calls a real-time image acquired by the rear camera, the rear vehicle distance meter transmits data to the central control system, and the rear vehicle speed calculating module calculates the rear vehicle distance and the vehicle speed of the rear vehicle based on the rear vehicle distance meter data. The back car distancer selects to utilize ultrasonic wave or laser or infrared ranging, as preferred, adopts infrared ranging according to the characteristics that infrared ray penetrating power is strong, and the infrared ray is difficult for by suspended particle scattering such as cloud under the not good condition of weather quality to can accurately acquire back car distance and speed of a motor vehicle. As the supplement of the image analysis module, the image analysis module overcomes the defects of low operation speed and large weather influence, and can better acquire visual data, so that the danger alarm module can acquire more accurate data and help a driver to turn or change lanes in time with the help of real-time images and alarms.
As shown in fig. 2, the embodiment further provides a rear inter-vehicle distance monitoring method during emergency braking of an automobile, wherein a rear camera is installed at the rear of the automobile, and is connected to a central control system of the automobile, and the central control system can call a real-time image of the rear camera. The central control screen is combined with the central control system, and after the central control system calls the rear camera image, the central control screen automatically displays the real-time image of the rear camera, and the method comprises the following steps:
s1, the central control system acquires the real-time speed of the vehicle through the vehicle speed detection module, and when the acceleration of the vehicle in a certain time period is greater than or equal to a threshold value and the direction of the acceleration is opposite to the driving direction of the vehicle, the central control system calls the real-time image acquired by the camera and projects the image onto a central control screen for display;
s2, the central control camera carries out calculation and analysis on the real-time image acquired by the rear camera through the image analysis module, and information including whether a vehicle comes behind and the speed of the vehicle comes is calculated;
s3, if the central control system calculates that there is no danger behind the vehicle after analysis, the driver judges to control the vehicle by himself, and selects to close the real-time image displayed on the central control screen through the operation module;
s4, if the central control system calculates that there is a danger behind the vehicle after analysis, the vehicle-mounted sound system is made to give an alarm sound by using the danger alarm module;
and S5, the driver takes a corresponding measure according to the real-time image displayed on the central control screen.
When the rear vehicle distance is larger than the preset vehicle distance, the central control system judges that no dangerous vehicle comes; when the rear vehicle distance is smaller than the preset vehicle distance and the rear vehicle speed is smaller than the preset vehicle speed, the vehicle-mounted sound box gives out a first alarm sound, and when the rear vehicle distance is smaller than the preset vehicle distance and the rear vehicle speed is larger than the preset vehicle speed, the vehicle-mounted sound box gives out a second alarm sound. In the embodiment, the preset vehicle distance is 200 meters, and the preset vehicle speed is 50 km/h. Preferably, the first alarm sound and the second alarm sound can be distinguished through the volume, and the volume of the second alarm sound is larger than that of the first alarm sound, so that a stronger warning effect is achieved for the driver.
And when the real-time image acquired by the rear camera is not clear and cannot be subjected to image analysis, the rear vehicle distance and the vehicle speed data calculated by the rear vehicle speed calculating module are called. In this embodiment, the image analysis module is used to analyze whether a vehicle is behind the vehicle, and then the vehicle speed and the vehicle distance data of the rear vehicle calculated by the rear vehicle speed dispersion module are called, based on the data, the central control system judges whether a dangerous vehicle comes or not, and judges whether the first alarm sound or the second alarm sound is released.
The implementation principle of the above embodiment is as follows: after the central control system judges that the vehicle is emergently braked through the vehicle speed detection module, the real-time image acquired by the rear camera is called by the rear camera image calling module and is put on the central control screen, so that a driver can conveniently know the situation behind the vehicle in time in a very short reaction time, the judgment and the operation are made in time, and the rear-end collision accident is avoided.
The scheme is mainly used for an intelligent automobile braking system and aims to provide images behind a vehicle and give a warning to a driver. The occurrence of rear-end accidents is avoided to the maximum extent. Meanwhile, the scheme can be applied to other vehicles.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. The utility model provides a rear car distance monitored control system when car emergency braking which characterized in that: the system comprises a central control system, wherein the central control system is connected with a central control screen and a rear camera for acquiring a vehicle rear image and comprises a vehicle speed detection module, a rear camera image calling module and a central control screen image releasing module;
the vehicle speed detection module is used for detecting the current speed of a vehicle in real time, and when the acceleration of the vehicle is greater than or equal to a threshold value within a certain time period and the direction is opposite to the driving direction of the vehicle, automatically triggering the central control system to send an instruction, and calling an image acquired by the rear camera;
the rear camera image calling module sends the real-time image acquired by the rear camera to the central control system under the instruction of the central control system when the vehicle acceleration is greater than or equal to a threshold value;
and the central control screen image releasing module releases the real-time image to the central control screen for display after the central control system acquires the real-time image.
2. A rear vehicle distance monitoring system for emergency braking of a vehicle according to claim 1, wherein: the central control system also comprises an image analysis module and a danger alarm module, wherein the image analysis module is used for carrying out image contrast analysis according to a real-time image acquired by the rear camera, calculating whether a dangerous coming vehicle exists behind and the driving speed of a rear vehicle, and sending a calculation result to the central control system; and the danger alarm module is used for triggering alarm after the central control system judges that a dangerous vehicle comes from the rear according to the calculation result of the image analysis module.
3. A rear vehicle distance monitoring system for emergency braking of a vehicle according to claim 2, wherein: and the danger alarm module is connected with the vehicle-mounted sound box.
4. A rear vehicle distance monitoring system for emergency braking of a vehicle according to claim 1, wherein: the central control screen is connected with an operation module and used for closing a rear camera displayed by the central control screen to obtain a real-time image after a driver manually judges that no danger exists behind the vehicle.
5. A rear vehicle distance monitoring system for emergency braking of a vehicle according to claim 1, wherein: the central control system is further connected with a rear vehicle distance meter and comprises a rear vehicle speed calculating module, when the central control system calls a real-time image acquired by a rear camera, the rear vehicle distance meter transmits data to the central control system, and the rear vehicle speed calculating module calculates the rear vehicle distance and the vehicle speed of the rear vehicle based on the rear vehicle distance meter data.
6. A rear vehicle distance monitoring system for emergency braking of a vehicle according to claim 1, wherein: the rear camera is connected with a storage module.
7. A rear vehicle distance monitoring method during emergency braking of an automobile is characterized by comprising the following steps:
s1, the central control system acquires the real-time speed of the vehicle through the vehicle speed detection module, and when the acceleration of the vehicle in a certain time period is greater than or equal to a threshold value and the direction of the acceleration is opposite to the driving direction of the vehicle, the central control system calls the real-time image acquired by the camera and projects the image onto a central control screen for display;
s2, the central control camera carries out calculation and analysis on the real-time image acquired by the rear camera through the image analysis module, and information including whether a vehicle comes behind and the speed of the vehicle comes is calculated;
s3, if the central control system calculates that there is no danger behind the vehicle after analysis, the driver judges to control the vehicle by himself, and selects to close the real-time image displayed on the central control screen through the operation module;
s4, if the central control system calculates that there is a danger behind the vehicle after analysis, the vehicle-mounted sound system is made to give an alarm sound by using the danger alarm module;
and S5, the driver takes a corresponding measure according to the real-time image displayed on the central control screen.
8. The method for monitoring the rear vehicle distance during the emergency braking of the vehicle as claimed in claim 7, wherein: when the rear vehicle distance is larger than the preset vehicle distance, the central control system judges that no dangerous vehicle comes; when the rear vehicle distance is smaller than the preset vehicle distance and the rear vehicle speed is smaller than the preset vehicle speed, the vehicle-mounted sound box gives out a first alarm sound, and when the rear vehicle distance is smaller than the preset vehicle distance and the rear vehicle speed is larger than the preset vehicle speed, the vehicle-mounted sound box gives out a second alarm sound.
9. The method for monitoring the rear vehicle distance during the emergency braking of the vehicle as claimed in claim 8, wherein: and when the real-time image acquired by the rear camera is not clear and cannot be subjected to image analysis, the rear vehicle distance and the vehicle speed data calculated by the rear vehicle speed calculating module are called.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911073916.9A CN110774980A (en) | 2019-11-06 | 2019-11-06 | Rear vehicle distance monitoring system and method during emergency braking of vehicle |
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| CN201911073916.9A CN110774980A (en) | 2019-11-06 | 2019-11-06 | Rear vehicle distance monitoring system and method during emergency braking of vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112339684A (en) * | 2020-10-27 | 2021-02-09 | 广州汽车集团股份有限公司 | Automobile safety mechanism triggering method and device based on probability distribution |
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