CN114312672A - Windshield wiper control method and system and automobile data recorder - Google Patents
Windshield wiper control method and system and automobile data recorder Download PDFInfo
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- CN114312672A CN114312672A CN202210111919.2A CN202210111919A CN114312672A CN 114312672 A CN114312672 A CN 114312672A CN 202210111919 A CN202210111919 A CN 202210111919A CN 114312672 A CN114312672 A CN 114312672A
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Abstract
The invention discloses a windshield wiper control method and system and a vehicle event data recorder. The method comprises the following steps: acquiring a video image of a front windshield of a vehicle through a front camera of a vehicle event data recorder; obtaining the area of a shelter by carrying out image analysis on a video image; acquiring the swing frequency of a windshield wiper required for clearing the shielding object according to the area of the shielding object; and controlling the wiper driving motor to control the wiper to swing at the wiper swinging frequency. The problem of among the prior art, only control the limitation of windshield wiper work according to rainfall sensor response rainfall, with windshield wiper control system integration in current vehicle event data recorder, can cancel the rainfall sensor in the current vehicle, save whole car cost. And, according to shelter from thing area automatic control windshield wiper with the frequency swing that is fit for, can promote the intelligence of windshield wiper control, do not need driver manual selection operating frequency, strengthened driving safety nature, promote user's use and experience.
Description
Technical Field
The invention relates to the field of automobile control, in particular to a windshield wiper control method and system and a vehicle event data recorder.
Background
The windshield wiper is used as a basic part of the automobile, can wipe off water stains and dirt on a windshield, and provides a driver with fresh and bright vision. At present, the opening and closing of the windshield wiper often need to be manually adjusted by a driver, and the driver is easily distracted. In addition, the operating frequency of the windshield wiper is judged by the rainfall sensor and adjusted, and only when dirt and shielding objects cover the windshield in front of the rainfall sensor, the windshield wiper can swing to remove the dirt, so that the shielding objects or rainwater cannot be scraped when the shielding objects or the rainwater do not cover the range of the rainfall sensor, and therefore the front visual field of drivers is influenced, and great potential safety hazards exist.
Disclosure of Invention
The embodiment of the invention provides a windshield wiper control method and system and an automobile data recorder, which are used for intelligently controlling the operation of a vehicle windshield wiper through the automobile data recorder so as to further improve the driving safety.
In a first aspect, an embodiment of the present invention provides a wiper control method, including:
acquiring a video image of a front windshield of a vehicle through a front camera of a vehicle event data recorder;
obtaining the area of a shelter by carrying out image analysis on the video image;
acquiring the windshield wiper swinging frequency required for clearing the shielding object according to the shielding object area; and controlling a wiper driving motor to control the wiper to swing at the wiper swinging frequency.
In a second aspect, an embodiment of the present invention provides a wiper control system, configured to execute the wiper control method provided in any embodiment of the present invention, where the system includes: the device comprises a camera module, an image analysis module and a drive control module;
the camera module is used for collecting video images of the front windshield of the vehicle; the camera module and the image analysis module are used for transmitting the video image to the image analysis module;
the image analysis module is used for acquiring the area of a shelter through the video image;
the driving control module is connected with the image analysis module and used for acquiring the corresponding swing speed of the windshield wiper according to the area of the shelter;
the drive control module is connected with a wiper drive motor so that the wiper drive motor controls the wiper to swing according to the wiper swing rate to clear the shielding object.
In a third aspect, an embodiment of the present invention further provides an automobile data recorder, where the automobile data recorder includes the wiper control system provided in any embodiment of the present invention.
In the invention, a front camera of a vehicle recorder is used for collecting a video image of a front windshield of a vehicle; carrying out image analysis on the video image to obtain the area of the shelter; acquiring the swing frequency of a windshield wiper required for clearing the shielding object according to the area of the shielding object; and controlling the wiper driving motor to control the wiper to swing at the wiper swinging frequency. The problem of among the prior art, thereby only control windshield wiper work's limitation according to rainfall sensor response rainfall, not only can get rid of the rainwater, can also get rid of other shelters such as spot is sheltered from the thing.
In addition, according to sheltering from thing area automatic control windshield wiper with the frequency swing that is fit for, can promote the intelligence of windshield wiper control, do not need driver manual selection operating frequency, strengthened driving safety nature, promote user's use and experience. And moreover, the wiper control system is integrated in the existing automobile data recorder, so that a rainfall sensor in the existing vehicle can be eliminated, and the cost of the whole automobile is saved. And the automobile data recorder can be further multifunctional, and more requirements of users can be met.
Drawings
Fig. 1 is a flowchart of a wiper control method according to an embodiment of the present invention;
fig. 2 is a flowchart of a wiper control method according to a second embodiment of the present invention;
fig. 3 is a flowchart of a wiper control method according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wiper control system according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of a wiper control system according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a wiper control method according to an embodiment of the present invention, which can be used to control a vehicle wiper when rainwater or other obstacles exist in a front windshield of the vehicle, so as to improve the intelligence of the operation of the wiper. The method comprises the following steps:
and S110, acquiring a video image of a front windshield of the vehicle through a front camera of the automobile data recorder.
In the embodiment of the invention, the front camera of the automobile data recorder collects real-time video images of a front windshield of a vehicle besides collecting images of a driving environment in front of the vehicle, and sends the collected images to an image analysis module so as to judge whether a shelter exists on the front windshield of the vehicle.
The shelter can be raindrops, dirt, plastic bags and the like, and the type of the shelter is not limited in the embodiment of the invention. If the shelters exist, the driver can be influenced by the fact that the outside is raining or other shelters such as dirt, plastic bags and the like exist on the front windshield, and the opening of the windshield wiper needs to be controlled to ensure that the driving visual field is clear.
The front camera of the automobile data recorder collects real-time video images of the front windshield of the vehicle to judge whether windshield wipers need to swing or not, and the windshield wipers are not controlled based on the rainfall sensor, so that the triggering condition for controlling the work of the windshield wipers is increased, and the accurate control of the windshield wipers of the vehicle under different conditions can be realized.
And S120, carrying out image analysis on the video image to obtain the area of the shelter.
Specifically, an image analysis module is arranged in the automobile data recorder, and the image analysis module analyzes the real-time video image after receiving the real-time video image of the front windshield sent by the camera.
Optionally, obtaining the area of the blocking object by performing image analysis on the video image may include:
performing picture interception operation on the video image at intervals of the same interval time;
judging whether a blocking object exists in the intercepted picture; if so, acquiring the area of the shielding object; if not, continuing to execute the picture interception operation.
For the acquired video image, the image capture may be performed on the video image of each frame, or the image capture may be performed on the video image at a certain set time length, in the embodiment of the present invention, the image capture operation is preferably performed on the video image at intervals of the same interval time, where the interval time may be set by a driver, which is not limited herein, and the embodiment of the present invention preferably has a shorter interval time, for example, 1 to 5 seconds. The frames of the video images are captured at short intervals, so that the frames of the video images in a certain time period cannot be missed, the memory capacity can be saved, and the working efficiency of the image analysis module is improved.
Further, the image analysis module analyzes the captured image, judges whether a shielding object exists in the image, further judges the area of the shielding object if the shielding object exists, and continues to capture the video image at the next moment and judges whether the shielding object exists if the shielding object does not exist.
Optionally, the method for determining whether the occlusion exists may be: pre-storing an image picture without a shielding object and full lighting on a front windshield of the vehicle in an image analysis module, comparing the captured video picture with the standard image picture by taking the image as a standard, and if new characteristic data exists in the picture, determining that the shielding object exists and further judging the area of the shielding object; or comparing the picture captured at the moment with the picture captured at the last moment, judging whether new characteristic data appears on the picture, and if so, judging that the shelter exists.
Optionally, in rainy weather, the new characteristic data may be raindrops, the image analysis module may determine whether raindrops exist in the captured image, and if so, the total area of the raindrops is obtained. Optionally, in rainy weather, raindrops fall on the glass, which may cause glass blurring and poor lighting, and the new characteristic data may be a picture blurring area, where the larger the picture blurring area is, the larger the area of the shelter is.
In addition, optionally, when the front windshield is not rained but a shielding object exists on the front windshield, the area size of the shielding object in the captured image can be obtained by comparing the captured image with a pre-stored standard image or a captured image at the previous moment. Optionally, the image analysis module may further determine the position of the blocking object according to the captured image.
Optionally, a first area threshold and a second area threshold may be set, and the image analysis module sends different signals to the driving control module after the judged area size of the blocking object is within a certain threshold range.
The method has the advantages that the obtained video image data are subjected to image interception, so that whether shielding objects exist in the image or not is judged, whether rainwater exists on the front windshield or not can be judged, whether other types of shielding objects exist on the front windshield or not can also be judged, and when the shielding objects exist on the windshield, the system automatically opens the windshield wiper to remove the shielding objects, so that the work intelligence of the windshield wiper system is enhanced, and the user experience is improved.
S130, acquiring the swing frequency of the windshield wiper required by clearing the shielding object according to the area of the shielding object; and controlling the wiper driving motor to control the wiper to swing at the wiper swinging frequency.
Specifically, after the image analysis module judges the area of the shielding object, a signal is sent to the driving control module, and after the driving control module receives the signal, the driving control module controls the wiper driving motor to drive the wiper to swing at a certain frequency. In the embodiment of the invention, when the areas of the shelters are different, the windshield wiper is controlled to swing at different frequencies, so that the shelters can be effectively removed in a short time.
Optionally, if the area of the shielding object is smaller than the second area threshold, acquiring a first swing frequency required for clearing the shielding object, and controlling the wiper driving motor to control the wiper to swing at the first swing frequency;
if the area of the shielding object is larger than the second area threshold and smaller than the first area threshold, acquiring a second swing frequency required for clearing the shielding object, and controlling the wiper driving motor to control the wiper to swing at the second swing frequency; the first wobble frequency is smaller than the second wobble frequency.
It will be appreciated that the wiper blade may be controlled to oscillate at a greater frequency if the area of the shield is greater, including greater rain and other larger areas of the shield.
Furthermore, when the image analysis module judges that the area of the shielding object is smaller than the second area threshold value, a first control signal can be sent to the driving control module, the first control signal represents that the area of the shielding object is smaller, and the windshield wiper can be controlled to swing at a relatively small frequency. Optionally, the specific value of the second area threshold may be set according to an actual situation, and the embodiment of the present invention is not limited to this, and for example, may be set to 15% of the total area of the front windshield of the vehicle, and when the area of the blocking object is smaller than 15% of the total area of the front windshield, the drive control module obtains the first oscillating frequency required for clearing the blocking object at this time, and controls the wiper drive motor to control the wiper to oscillate at the first oscillating frequency, and a person skilled in the art may also set the first oscillating frequency according to the actual situation, and the embodiment of the present invention is not limited to this, and for example, may be set to a frequency corresponding to a low gear of the existing wiper drive motor.
Further, when the image analysis module determines that the area of the shielding object is larger than the second area threshold and smaller than the first area threshold, a second control signal can be sent to the driving control module, wherein the second control signal indicates that the area of the shielding object is larger and the windshield wiper needs to be controlled to swing at a relatively large frequency. Optionally, the specific value of the first area threshold may be set according to an actual situation, and the embodiment of the present invention is not limited to this, for example, the specific value may be set to 70% of the total area of the front windshield of the vehicle, and when the area of the blocking object is greater than 15% of the total area of the front windshield and smaller than 70% of the total area of the front windshield, the drive control module obtains a second oscillating frequency required for removing the blocking object at this time, and controls the wiper drive motor to control the wiper to oscillate at the second oscillating frequency. It should be noted that the first wobble frequency should be smaller than the second wobble frequency.
Optionally, when the image analysis module determines that other shielding objects such as stains exist on the front windshield, the drive control module may further control the wiper to spray water close to the nozzle of the shielding object according to the area and the position of the shielding object, and then the wiper swings to remove the stains.
Optionally, the modules may communicate with each other by using a CAN bus or an ethernet.
By setting the first area threshold, the second area threshold, the first swing frequency and the second swing frequency, after the area of the shielding object judged by the image analysis module is within a certain threshold range, a corresponding control signal is sent to the drive control module. The drive control module controls the windshield wiper drive motor to drive the windshield wiper to swing at the corresponding frequency according to the control signal, so that the shielding object on the windshield can be effectively removed, the phenomenon that the windshield wiper swings at the faster frequency to bring discomfort to a driver when the shielding object area is smaller can be avoided, and the intelligence and the friendliness of the windshield wiper control method are further improved.
According to the technical scheme in the first embodiment of the invention, a front camera of a vehicle driving recorder is used for collecting a video image of a front windshield of a vehicle; carrying out image analysis on the video image to obtain the area of the shelter; acquiring the swing frequency of a windshield wiper required for clearing the shielding object according to the area of the shielding object; and controlling the wiper driving motor to control the wiper to swing at the wiper swinging frequency. The problem of among the prior art, only respond to the limitation of rainfall control windshield wiper work according to rainfall sensor, not only can get rid of the rainwater, can also get rid of other shelters such as spot is solved. In addition, according to sheltering from thing area automatic control windshield wiper with the frequency swing that is fit for, can promote the intelligence of windshield wiper control, do not need driver manual selection operating frequency, strengthened driving safety nature, promote user's use and experience.
Example two
Fig. 2 is a flowchart of a wiper control method according to a second embodiment of the present invention, which is further detailed based on the wiper control method according to the second embodiment, and specifically includes the following steps:
s210, collecting a video image of a front windshield of the vehicle through a front camera of the automobile data recorder.
And S220, carrying out image analysis on the video image to obtain the area of the obstruction.
S230, judging whether the area of the shielding object is larger than a first area threshold value, if so, executing S240, and then executing S250; if not, go to S260.
And S240, triggering and executing an emergency event recording operation, wherein the emergency event recording operation is to intercept video images within a first time period before the triggering time of the emergency event recording operation and a second time period after the triggering time.
Specifically, the image analysis module analyzes the captured image, if a shelter is judged to exist in the image and the area of the shelter exceeds a first area threshold, an emergency recording signal is sent to the emergency recording module, and after the emergency recording module receives the emergency recording signal, the emergency recording module triggers an emergency recording operation, namely, video images in a first time period before the moment and a second time period after the triggering moment are captured; if the image analysis module judges that the area of the shielding object is smaller than or equal to the first area threshold value, S260 is executed, and the windshield wiper is controlled to swing at different frequencies according to the area of the shielding object so as to clear the shielding object.
Optionally, a specific numerical value of the first area threshold is not limited, and the embodiment of the present invention is preferably set to 70% of the total area of the front windshield of the vehicle, and if the area of the blocking object exceeds 70% of the total area of the front windshield of the vehicle, it indicates that the driving view of the driver is seriously affected due to an excessive rain or an excessive area of another blocking object, and an accident is easily caused during driving under this condition. In this case, the emergency recording module may automatically intercept the video image in the first time period before the time and in the second time period after the time while the driving control module controls the wiper to still swing at the second frequency. Optionally, specific values of the first time period and the second time period are not limited herein, and for example, video images of 5 seconds before and 5 seconds after the triggering of the emergency recording operation may be intercepted.
Optionally, the emergency recording module may further be connected to a speaker of the vehicle host, and after the emergency recording operation is triggered, the emergency recording module sends an alarm signal, and the alarm signal is sent by the speaker to prompt passengers that the area of the front windshield shelter is large and the front windshield shelter may not be removed by a wiper. Potential risks can be prompted to the driver, driving safety is further improved, and accidents are prevented.
And S250, saving the video image captured by the emergency event recording operation as an event video in a memory and/or a cloud server.
After the emergency recording operation is triggered, the memory records the video image intercepted by the emergency recording module within the period of time, and/or the communication module uploads the video image intercepted by the event recording module to the cloud server. The video can be effectively stored or uploaded, the problem that when the memory of the driving recorder is small, the video can be covered when the accident happens can be effectively avoided, and if the accident happens, a basis can be provided for accident investigation and tracing of a driver.
S260, acquiring the swing frequency of the windshield wiper required by clearing the shielding object according to the area of the shielding object; and controlling the wiper driving motor to control the wiper to swing at the wiper swinging frequency.
Optionally, if the area of the shielding object is smaller than the second area threshold, acquiring a first swing frequency required for clearing the shielding object, and controlling the wiper driving motor to control the wiper to swing at the first swing frequency;
if the area of the shielding object is larger than the second area threshold and smaller than the first area threshold, acquiring a second swing frequency required for clearing the shielding object, and controlling the wiper driving motor to control the wiper to swing at the second swing frequency; the first wobble frequency is smaller than the second wobble frequency.
Optionally, each module may be configured to communicate with another module via a CAN bus or an ethernet. It should be noted that each module is arranged in the vehicle event data recorder.
In the embodiment of the invention, when the image analysis module judges that the area of the shelter is too large and can cause danger to vehicle driving, the emergency recording module can trigger the emergency recording operation, video images of a period of time before and after the moment are captured, and then the video images are stored and/or uploaded to the cloud server, so that the safety of a driver is ensured to the greatest extent from the aspects of driving and driven. In addition, when the memory of the driving recorder is small, the problem that the video is possibly covered when the accident happens can be effectively solved by storing or uploading the video, and if the accident happens, a basis can be provided for the accident investigation and the tracing of a driver.
EXAMPLE III
Fig. 3 is a flowchart of a wiper control method according to a third embodiment of the present invention, which is further detailed based on the wiper control method according to the third embodiment, and specifically includes the following steps:
and S310, acquiring a video image of a front windshield of the vehicle through a front camera of the automobile data recorder.
And S320, carrying out image analysis on the video image to obtain the area of the shelter.
S330, acquiring the swing frequency of the windshield wiper required by clearing the shielding object according to the area of the shielding object; and controlling the wiper driving motor to control the wiper to swing at the wiper swinging frequency.
S340, judging whether the windshield wiper swings to clear the shielding object after the first preset time length; if not, executing S360 after executing S350; if yes, go back to S320 again.
And S350, triggering and executing an emergency event recording operation, wherein the emergency event recording operation is to intercept video images in a first time period before the triggering time of the emergency event recording operation and a second time period after the triggering time.
And S360, storing the video image captured by the emergency event recording operation as an event video into a memory and/or a cloud server.
Specifically, after the image analysis module detects that a shielding object exists and sends a control signal to the drive control module according to the area of the shielding object, and the drive control module also controls the wiper to remove the frequency swing required by the shielding object for a first preset time, if the shielding object still exists in the video picture captured by the image analysis module, an emergency recording signal is sent to the drive control module, and the emergency recording module also triggers and executes an emergency recording operation; if the obstruction does not exist in the video picture intercepted by the image analysis module, the obstruction is considered to be removed, S320 is executed again, and the image analysis is continuously carried out on the video picture.
The specific value of the first preset time period is not limited in the embodiment of the invention, and for example, the specific value may be set to 20 to 40 seconds, if the wiper swings for the first preset time period, the sheltering object still exists, which indicates that the sheltering object may not be removed only by the wiper of the vehicle, there may be a potential safety hazard in driving under the condition, at this time, the emergency recording operation may also be triggered, and the emergency recording module may automatically intercept the video image in the first time period before the time and in the second time period after the time.
Optionally, the emergency recording module may further be connected to a speaker of the vehicle host, and after the emergency recording operation is triggered, the emergency recording module sends an alarm signal, and the alarm signal is sent by the speaker to prompt passengers that the area of the front windshield shelter is large and the front windshield shelter may not be removed by a wiper. Potential risks can be prompted to the driver, driving safety is further improved, and accidents are prevented.
After the emergency recording operation is triggered, the memory records the video image intercepted by the emergency recording module within the period of time, and/or the communication module uploads the video image intercepted by the event recording module to the cloud server.
Optionally, each module may be configured to communicate with a Controller Area Network (CAN) bus or an ethernet network, and it should be noted that each module is disposed in the vehicle event data recorder.
In the embodiment of the invention, when the windshield wiper swings for a certain preset time under the frequency capable of clearing the shelters, the shelters are not removed, the emergency recording module triggers the emergency recording operation, video images of a period of time before and after the moment are captured, and then the video images are stored and/or uploaded to the cloud server, so that the safety of a driver is ensured to the greatest extent in the aspects of driving and driven. In addition, when the memory of the driving recorder is small, the problem that the video is possibly covered when the accident happens can be effectively solved by storing or uploading the video, and if the accident happens, a basis can be provided for the accident investigation and the tracing of a driver.
Example four
Fig. 4 is a schematic structural diagram of a wiper control system according to a fourth embodiment of the present invention, where the wiper control system is configured to execute a wiper control method according to any embodiment of the present invention, and the system includes: a camera module 410, an image analysis module 420, and a drive control module 430;
the camera module 410 is used for collecting video images of a front windshield of the vehicle; the camera module 410 is connected with the image analysis module 420, and is used for transmitting the video image to the image analysis module 420;
the image analysis module 420 is used for acquiring the area of the obstruction through the video image;
the driving control module 430 is connected with the image analysis module 420 and is used for acquiring a corresponding swing rate of the windshield wiper according to the area of the barrier;
the driving control module 430 is connected to the wiper driving motor, so that the wiper driving motor controls the wiper to swing according to the wiper swing rate to clear the obstruction.
Optionally, camera module 410 includes a front camera of a vehicle tachograph.
Optionally, the image analysis module 420 may be specifically configured to: performing picture interception operation on the video image at intervals of the same interval time; judging whether a blocking object exists in the intercepted picture; if so, acquiring the area of the shielding object; if not, continuing to execute the picture interception operation.
The specific analysis method is the same as that in the above embodiments, and is not described herein again.
Optionally, the image analysis module 420 may be further configured to: and judging the position of the shelter according to the captured picture.
Optionally, the image analysis module 420 may be further configured to send a first control signal to the driving control module 430 when determining that the area of the obstacle is smaller than the second area threshold, where the first control signal indicates that the area of the obstacle is smaller, and may control the wiper to swing at a relatively small frequency; when the area of the shielding object is judged to be larger than the second area threshold and smaller than the first area threshold, a second control signal can be sent to the driving control module 430, wherein the second control signal indicates that the area of the shielding object is larger and the windshield wiper needs to be controlled to swing at a relatively large frequency.
Optionally, the driving control module 430 may be specifically configured to: if the area of the shielding object is smaller than the second area threshold value, acquiring a first swing frequency required for clearing the shielding object, and controlling a wiper driving motor to control the wiper to swing at the first swing frequency so as to clear the shielding object; if the area of the shielding object is larger than the second area threshold and smaller than the first area threshold, acquiring a second swing frequency required for clearing the shielding object, and controlling the wiper driving motor to control the wiper to swing at the second swing frequency; the first wobble frequency is less than the second wobble frequency.
Optionally, the driving control module 430 may further be configured to control the wiper to spray water near the nozzle of the blocking object according to the area and the position of the blocking object, and then swing the wiper to remove the dirt.
Optionally, each module may be configured to communicate with another module via a CAN bus or an ethernet. In addition, all modules in the wiper control system are arranged in a vehicle driving recorder.
According to the technical scheme provided by the embodiment of the invention, the camera module, the image analysis module and the drive control module are arranged, so that the system can automatically control the operation of the windshield wiper according to the area of the sheltering object and adjust the working frequency, the limitation that the operation of the windshield wiper is controlled only according to the rainfall sensed by the rainfall sensor in the prior art is solved, and not only can rainwater be removed, but also other sheltering objects such as dirt and the like can be removed.
In addition, according to sheltering from thing area automatic control windshield wiper with the frequency swing that is fit for, can promote the intelligence of windshield wiper control, do not need driver manual selection operating frequency, strengthened driving safety nature, promote user's use and experience. And moreover, the wiper control system is integrated in the existing automobile data recorder, so that a rainfall sensor in the existing vehicle can be eliminated, and the cost of the whole automobile is saved. And the automobile data recorder can be further multifunctional, and more requirements of users can be met.
EXAMPLE five
Fig. 5 is a schematic structural diagram of a wiper control system according to a fifth embodiment of the present invention, which is further detailed on the basis of the wiper control system according to the fifth embodiment, and in addition to the camera module 410, the image analysis module 420 and the driving control module 430, the wiper control system may further include:
an emergency recording module 510; the emergency recording module 510 is connected to the image analysis module 420, and configured to trigger and execute an emergency recording operation when the area of the barrier is larger than a first area threshold and/or the barrier is not cleared by the swing of the wiper after a first preset time period; the emergency recording operation is to intercept video images within a first time period before a trigger time of the emergency recording operation and a second time period after the trigger time.
Optionally, the wiper control system may further include: a memory 520 and a communication module 530; the memory 520 is connected to the image analysis module 420 and is used for storing the video image captured by the emergency recording module 510; the communication module 530 is connected to the image analysis module 420, and is configured to upload the video image captured by the emergency recording module 510 to a cloud server.
Optionally, both the memory 520 and the communication module 530 may be connected to the emergency recording module 510 for obtaining the video image captured by the emergency recording module 510.
Optionally, at this time, the image analysis module 420 may be specifically configured to: and when the area of the barrier is judged to exceed the first area threshold and/or the barrier is not cleared by the swinging of the wiper after the first preset time, sending an emergency recording signal to the emergency recording module 510.
Optionally, the emergency recording module 510 may be specifically configured to: after receiving the emergency recording signal sent by the image analysis module 420, an emergency recording operation is triggered and executed.
Optionally, the emergency recording module 510 may further be connected to a speaker of a host of the vehicle, and after the emergency recording operation is triggered, the emergency recording module 510 sends an alarm signal, and the alarm signal is sent by the speaker to prompt passengers that the area of the front windshield shelter is large and the front windshield shelter may not be removed by a wiper. Potential risks can be prompted to the driver, driving safety is further improved, and accidents are prevented.
Further, after the emergency recording operation is triggered, the memory 520 records the video image captured by the emergency recording module 510 during the period of time, and/or the communication module 530 uploads the video image captured by the event recording module 510 to the cloud server.
Optionally, each module may be configured to communicate with another module via a CAN bus or an ethernet. In addition, each module is arranged in the vehicle driving recorder.
According to the technical scheme provided by the embodiment of the invention, when the windshield wiper swings for a certain preset time under the frequency capable of clearing the shielding object, the shielding object is not removed, the emergency recording module triggers the emergency recording operation, video images of a period of time before and after the moment are captured, the memory stores the video images, and/or the communication module uploads the video images to the cloud server, so that the safety of a driver is ensured to the greatest extent from the aspects of driving and driven. In addition, when the memory of the driving recorder is small, the problem that the video is possibly covered when the accident happens can be effectively solved by storing or uploading the video, and if the accident happens, a basis can be provided for the accident investigation and the tracing of a driver.
EXAMPLE six
In addition, an embodiment of the present invention further provides an automobile data recorder, where the automobile data recorder includes the wiper control system provided in any embodiment of the present invention, and the automobile data recorder has all the technical features and corresponding beneficial effects of the wiper control system provided in any embodiment of the present invention, and details are not described here. By integrating the windshield wiper control system in the existing automobile data recorder, a rainfall sensor in the existing vehicle can be eliminated, and the cost of the whole automobile is saved. And the automobile data recorder can be further multifunctional, and more requirements of users can be met.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A wiper control method, characterized by comprising:
acquiring a video image of a front windshield of a vehicle through a front camera of a vehicle event data recorder;
obtaining the area of a shelter by carrying out image analysis on the video image;
acquiring the windshield wiper swinging frequency required for clearing the shielding object according to the shielding object area; and controlling a wiper driving motor to control the wiper to swing at the wiper swinging frequency.
2. The wiper control method according to claim 1, further comprising, after performing image analysis on the video image to obtain an area of a blocking object:
judging whether the area of the shielding object is larger than a first area threshold value, if so, triggering and executing an emergency recording operation;
the emergency recording operation is to intercept the video image within a first time period before a trigger time of the emergency recording operation and a second time period after the trigger time.
3. The wiper control method according to claim 1, further comprising, after controlling the wiper drive motor to control the wiper swinging at the wiper swinging frequency:
judging whether the windshield wiper swings to clear the shielding object after the first preset time length; if not, triggering and executing an emergency event recording operation;
the emergency recording operation is to intercept the video image within a first time period before a trigger time of the emergency recording operation and a second time period after the trigger time.
4. The wiper control method according to claim 2 or 3, further comprising, after triggering and executing the emergency recording operation:
and storing the video image captured by the emergency recording operation as an event video in a memory and/or a cloud server.
5. The wiper control method according to claim 1, wherein obtaining an area of a blocking object by performing image analysis on the video image includes:
performing picture interception operation on the video image at intervals of the same interval;
judging whether a blocking object exists in the intercepted picture; if so, acquiring the area of the shelter; if not, continuing to execute the picture interception operation.
6. The wiper control method according to claim 1, wherein acquiring a wiper oscillation frequency required for removing the obstruction from the area of the obstruction, and controlling a wiper drive motor to control the wiper oscillation at the wiper oscillation frequency comprises:
if the area of the shielding object is smaller than a second area threshold value, acquiring a first swing frequency required for clearing the shielding object, and controlling a wiper driving motor to control the wiper to swing at the first swing frequency;
if the area of the shielding object is larger than a second area threshold and smaller than a first area threshold, acquiring a second swing frequency required for clearing the shielding object, and controlling a wiper driving motor to control the wiper to swing at the second swing frequency; the first wobble frequency is less than the second wobble frequency.
7. A wiper control system for executing the wiper control method according to any one of claims 1 to 6, comprising: the device comprises a camera module, an image analysis module and a drive control module;
the camera module is used for collecting video images of the front windshield of the vehicle; the camera module is connected with the image analysis module and is used for transmitting the video image to the image analysis module;
the image analysis module is used for acquiring the area of a shelter through the video image;
the driving control module is connected with the image analysis module and used for acquiring the corresponding swing speed of the windshield wiper according to the area of the shelter;
the drive control module is connected with a wiper drive motor so that the wiper drive motor controls the wiper to swing according to the wiper swing rate to clear the shielding object.
8. The wiper control system according to claim 7, further comprising: an emergency recording module;
the emergency recording module is connected with the image analysis module and is used for triggering and executing emergency recording operation when the area of the shelter is larger than a first area threshold value and/or the shelter is not cleared by the swinging of the windshield wiper after a first preset time;
the emergency recording operation is to intercept the video image within a first time period before a trigger time of the emergency recording operation and a second time period after the trigger time.
9. The wiper control system according to claim 8, further comprising: a memory and a communication module;
the memory is connected with the image analysis module and is used for storing the video image intercepted by the emergency event recording module;
the communication module is connected with the image analysis module and used for uploading the video image intercepted by the emergency recording module to a cloud server.
10. A tachograph comprising a wiper control system according to any one of claims 7 to 9.
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