CN111741206B - Camera self-cleaning device, camera system and camera system control method - Google Patents
Camera self-cleaning device, camera system and camera system control method Download PDFInfo
- Publication number
- CN111741206B CN111741206B CN202010764564.8A CN202010764564A CN111741206B CN 111741206 B CN111741206 B CN 111741206B CN 202010764564 A CN202010764564 A CN 202010764564A CN 111741206 B CN111741206 B CN 111741206B
- Authority
- CN
- China
- Prior art keywords
- transparent cover
- cover plate
- camera
- shell
- fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/52—Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Studio Devices (AREA)
- Camera Bodies And Camera Details Or Accessories (AREA)
Abstract
The invention relates to a camera self-cleaning device, a camera system and a camera system control method, and relates to the technical field of cameras. The main technical scheme adopted is as follows: a camera self-cleaning device, comprising: the device comprises a shell, a transparent cover plate and a fan; the first side and the second side of the shell, which are opposite to each other, are respectively provided with an opening and an air hole, and the opening is in a necking form; the transparent cover plate is connected with the inner wall of the shell close to the opening to seal the opening, and a plurality of vent holes are arranged between the periphery of the edge of the transparent cover plate and the inner wall of the shell at intervals; the fan is arranged in the shell and close to the second side and used for blowing air to the first side; wherein, the space between inside fan of casing and the transparent cover is used for setting up the camera module, and can form the wind channel between the inner wall of casing and the camera module, and wind channel intercommunication ventilation hole and gas pocket, the wind that the fan blew off loops through wind channel, ventilation hole and blows off. The technical problems that a camera lens is easily shielded by dust, raindrops are attached and frosted are solved.
Description
Technical Field
The invention relates to the technical field of cameras, in particular to a camera self-cleaning device, a camera system and a camera system control method.
Background
The camera is used as the most important sensor of the automatic driving automobile, the robot and other intelligent devices, and is inevitably influenced by weather and environment in use, such as dust shielding, raindrop adhesion, frost covering and the like, and the imaging quality of the camera lens is greatly influenced by the severe environmental conditions, so that the perception of the surrounding environment is influenced, and the normal and safe operation of the automatic driving automobile, the robot or other intelligent devices is finally influenced.
Therefore, how to obtain a camera capable of solving the problems of dust shielding, raindrop adhesion and frosting, that is, obtaining a camera with a self-cleaning function, needs further research by technicians.
Disclosure of Invention
The present invention is directed to a camera self-cleaning device, a camera system and a camera system control method, which can solve the technical problems of dust shielding, raindrop adhesion and frosting.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. According to the invention, the self-cleaning device of the camera comprises:
the air conditioner comprises a shell, wherein a first side and a second side, opposite to the shell, of the shell are respectively provided with an opening and an air hole, and the opening is in a necking form;
the transparent cover plate is connected with the inner wall, close to the opening, of the shell to cover the opening, and a plurality of vent holes are formed in the periphery of the edge of the transparent cover plate and the inner wall of the shell at intervals;
the fan is arranged in the shell and close to the second side and used for blowing air to the first side;
wherein, the casing is inside the fan with space between the transparent cover is used for setting up the camera module, just the inner wall of casing with can form the wind channel between the camera module, the wind channel intercommunication the ventilation hole with the gas pocket, the wind that the fan blew off loops through the wind channel the ventilation hole blew off.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, in the self-cleaning device for a camera, a first side of the housing is provided with a folded edge bent towards the middle part to form the opening in a form of a throat;
the angle between the folded edge and an axis passing through the first side and the second side of the shell is 30-60 degrees.
Optionally, the camera self-cleaning device further comprises a flap extending from the first side of the housing to the second side of the housing, wherein the flap is angled at 45 degrees with respect to an axis passing through the first side and the second side of the housing.
Optionally, in the self-cleaning device for a camera, the transparent cover plate is connected to the inner wall of the housing through a plurality of brackets, and a plurality of vent holes are formed between the edge of the transparent cover plate and the inner wall of the housing;
or, a circle of the edge of the transparent cover plate is in a shape of a wheel tooth, the inner wall of the shell is provided with an installation bulge, and the edge of the wheel tooth of the transparent cover plate is matched with the installation bulge to form the ventilation hole.
Optionally, the camera self-cleaning device further includes:
an inorganic hydrophilic membrane covering a side of the transparent cover plate facing away from the second side.
Optionally, the camera self-cleaning device further includes:
the heating component is arranged on the transparent cover plate and used for heating the transparent cover plate.
Optionally, in the self-cleaning device for a camera, the heating component is a ring-shaped heating wire, the heating wire is integrated inside the transparent cover plate, the ring-shaped heating wire is arranged near the edge of the transparent cover plate, or the ring-shaped heating wire is arranged around the edge of the transparent cover plate;
or the heating part is a transparent electric heating film, and the transparent electric heating film is covered on one side surface of the transparent cover plate close to the second side.
The object of the present invention and the technical problem to be solved are achieved by the following means. According to the present invention, a camera system is provided, which includes: a camera self-cleaning device;
the self-cleaning device for a camera includes:
the air conditioner comprises a shell, wherein a first side and a second side, opposite to the shell, of the shell are respectively provided with an opening and an air hole, and the opening is in a necking form;
the transparent cover plate is connected with the inner wall, close to the opening, of the shell to cover the opening, and a plurality of vent holes are formed in the periphery of the edge of the transparent cover plate and the inner wall of the shell at intervals;
the fan is arranged in the shell and close to the second side and used for blowing air to the first side;
the space between the fan and the transparent cover plate in the shell is used for arranging a camera module, an air channel can be formed between the inner wall of the shell and the camera module, the air channel is communicated with the vent holes and the air holes, and air blown out by the fan sequentially passes through the air channel and the vent holes;
a camera module;
the camera module is arranged inside a shell of the camera self-cleaning device, and an air duct is formed between the camera module and the inner wall of the shell.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, in the camera system, a lens center line of the camera module, an axis of the housing penetrating through the first side and the second side, and a fan rotation axis of the camera self-cleaning device coincide with each other.
The object of the present invention and the technical problem to be solved are achieved by the following means. The invention provides a camera system control method, which comprises the following steps:
acquiring a first frame image;
performing brightness detection and out-of-focus detection on the first frame image;
judging the state of the first frame image according to the results of the brightness detection and the out-of-focus detection;
and if the first frame image is judged to be in a dust covering state, controlling the fan to start working.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, in the foregoing method, if it is determined that the first frame of image is in a non-dust-covered state, acquiring subsequent continuous multi-frame images, calculating an average image of the acquired multi-frame images, and performing Canny edge detection;
if the closed edge envelope exists, calculating the closed edge envelope area;
if the envelope area exceeds the threshold value, the frosting state is judged, the fan and the heating part are controlled to start working, if the envelope area is in the threshold value range, the frosting state is judged, the fan and the heating part are also controlled to start working, and if the envelope area is smaller than the threshold value range, the fan and the heating part are controlled not to work.
By the technical scheme, the camera self-cleaning device, the camera system and the camera system control method at least have the following advantages:
the camera self-cleaning device provided by the embodiment of the invention can accommodate the camera module in the shell, so that the camera module can shoot scenery through the transparent cover plate on the first side of the shell, and dust, water drops and water vapor are prevented from falling on the camera module, particularly the pollutants are prevented from falling on a lens of the camera module; in addition, an air duct communicating the vent hole on the first side and the air hole on the second side can be formed between the camera module and the inner wall of the shell, the camera self-cleaning device is also provided with a fan at a position close to the second side in the shell, so that wind blown out by the fan can flow through the air duct and be blown out from the vent hole on the first side, the heat of the camera module can be taken away, the overheating of the camera module is avoided, the high-performance operation of the camera module is ensured, the opening on the first side of the shell is further set to be in a necking form, so that part of the wind blown out from the vent hole on the first side can be blown to the surface of the transparent cover plate, dust falling on the surface of the transparent cover plate can be blown away, and because the blown wind has the heat of the camera module, water drops falling on the transparent cover plate can be rapidly blown and evaporated or blown away, frost on, meanwhile, a layer of air film can be formed in front of the transparent cover plate, rainwater, dust and the like are prevented from falling on the transparent cover plate, and the effect of continuously keeping the transparent cover plate clean is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a self-cleaning device for a camera according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a housing and a fan of a self-cleaning device of a camera according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a transparent cover plate and a housing of a self-cleaning device for a camera according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another transparent cover plate and housing of a self-cleaning device for a camera according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a camera module and a housing of a self-cleaning device for a camera according to an embodiment of the present invention;
fig. 6 is a flowchart of a camera system control method according to an embodiment of the present invention;
fig. 7 is a flowchart of another camera system control method according to an embodiment of the present invention.
In the attached drawings 1-5, the reference numbers are respectively:
100-camera self-cleaning device, 200-camera module, 1-shell, 11-opening, 12-air hole, 13-folding edge, 14-installation bulge, 2-transparent cover plate, 3-air hole, 4-fan, 5-air channel, 6-bracket, 7-inorganic hydrophilic membrane, 8-heating component, 9-filter screen and 10-air membrane.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the camera self-cleaning device, the camera system and the camera system control method according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Example one
As shown in fig. 1, a self-cleaning device 100 for a camera according to an embodiment of the present invention includes: the device comprises a shell 1, a transparent cover plate 2 and a fan 4; the first side and the second side of the shell 1 opposite to each other are respectively provided with an opening 11 and an air hole 12, and the opening 11 is in a necking form; the transparent cover plate 2 is connected with the inner wall of the shell 1 close to the opening 11 to cover the opening 11, and a plurality of vent holes 3 are arranged between the inner wall of the shell 1 and the periphery of the edge of the transparent cover plate 2 at intervals; the fan 4 is arranged inside the shell 1 and close to the second side and used for blowing air to the first side; wherein, casing 1 is inside fan 4 with space between the transparent cover 2 is used for setting up camera module 200, just the inner wall of casing 1 with can form wind channel 5 between the camera module 200, wind channel 5 intercommunication ventilation hole 3 with gas pocket 12, the wind that fan 4 blew off loops through wind channel 5 ventilation hole 3 blew off.
Specifically, casing 1 is that the appearance is the structure of circular column, rectangle post or other polygon post structures, and its inside is empty, and its relative first side and second side can be located casing 1's length direction's both ends, and first side is the opening 11 of throat form, and the second side is gas pocket 12, and this gas pocket 12 can be the gas pocket 12 of the mesh form that the array was arranged, and gas pocket 12 department can shelter from dustproof ventilative filter screen 9, avoids the dust to get into inside the casing 1. The housing 1 may be made of a plastic material, or may be made of a metal material, such as an iron alloy, an aluminum alloy, or a magnesium alloy. The thickness of the housing 1 can be determined according to the strength requirement and the selected material, and the size of the housing 1 can be determined according to the size of the camera module 200 to be accommodated.
The transparent cover plate 2 can be made of transparent glass, acrylic plastic and the like, and the transparent cover plate 2 is connected with the inner wall of the first side of the shell 1 and avoids the position of the opening 11 with the reduced deformation. Can be through support 6, glue or direct connection between the inner wall of transparent cover plate 2 and casing 1, but it all need to be noted that between border a week and the inner wall of transparent cover plate 2 all need be guaranteed in any kind of connection, the spaced a plurality of ventilation holes 3 that set up to the wind that makes from the second side to first side blow out through ventilation hole 3.
The fan 4 is a miniature fan 4, so that the miniature fan 4 can be arranged in the shell 1, and the fan 4 is preferably a fan 4 with the rotating speed capable of being controlled by a controller, so that the rotating speed of the fan 4 can be controlled according to the requirement of the air volume. The fan 4 sets up the position that is close to the second side in casing 1, and the axis of rotation of fan 4 needs with the axis coincidence that passes casing 1 first side and second side, guarantees that fan 4 is located the central line of casing 1, and then can inhale the air from gas pocket 12, and even ventilation hole 3 to the first side blows out. The fan 4 may be fixed in a manner as shown in fig. 2, in which the fan 4 may be installed on the center line of the casing 1 by arranging support members in three directions on the inner wall of the casing 1 and then arranging a movable support bolt in a fourth direction, the ring-shaped bracket 6 may also be designed to support and fix the fan 4 in the casing 1, and the fan 4 is located at the center of the casing 1, and the fan 4 may also be installed by using other fixing and installing means commonly used by technicians, which is not particularly limited in the embodiment of the present invention.
The fan 4 may be individually controlled by a controller, or may be directly controlled by a general controller of a device, a vehicle, a robot, or the like, to which the camera system is applied.
The camera self-cleaning device 100 provided by the embodiment of the invention can accommodate the camera module 200 in the housing 1, so that the camera module 200 can shoot scenery through the transparent cover plate 2 on the first side of the housing 1, thereby preventing dust, water drops and water vapor from falling on the camera module 200, and particularly preventing the pollutants from falling on the lens of the camera module 200; in addition, an air duct 5 communicating the vent hole 3 of the first side and the air hole 12 of the second side can be formed between the camera module 200 and the inner wall of the housing 1, the camera self-cleaning device 100 is further provided with a fan 4 at a position close to the second side in the housing 1, so that wind blown out by the fan 4 can flow through the air duct 5 and blow out from the vent hole 3 of the first side, heat of the camera module 200 can be taken away, overheating of the camera module 200 is avoided, high-performance operation of the camera module 200 is ensured, the camera self-cleaning device 100 further sets the opening 11 of the first side of the housing 1 to be in a necking form, so that a part of the wind blown out from the vent hole 3 of the first side can blow on the surface of the transparent cover plate 2, dust falling on the surface of the transparent cover plate 2 can be blown away, and because the blown wind has heat of the camera module 200, water drops falling on the transparent cover, The frosting on the transparent cover plate 2 is blown to achieve a self-cleaning function, and meanwhile, a layer of air film 10 can be formed in front of the transparent cover plate 2 to prevent rainwater, dust and the like from falling on the transparent cover plate 2, so that the effect of continuously keeping the transparent cover plate 2 clean is achieved.
In a specific implementation, as shown in fig. 1, a first side of the housing 1 is provided with a folded edge 13 bent towards the middle to form the opening 11 in the form of a throat; the angle between the fold 13 and the axis running through the first and second sides of the housing 1 is 30-60 degrees.
Specifically, since the first side of the housing 1 is the opening 11, that is, the whole housing is in the structure of a cylinder, the opening 11 in the form of a throat can be formed by arranging the folded edge 13 on the first side, so that it can be ensured that the wind blown from the ventilation hole 3 is blocked by the folded edge 13, a part of the wind blows onto the transparent cover plate 2, and a part of the wind forms the air film 10 in front of the transparent cover plate 2.
In order to make the wind blown out from the vent holes 3 generate the above-mentioned effect by the opening 11, the angle between the folded edge 13 and the axis passing through the first side and the second side of the housing 1 may be set to 30 degrees to 60 degrees, and preferably 45 degrees.
In the specific implementation, there are various connection ways between the transparent cover plate 2 and the housing 1, and the following are preferable two ways:
first, as shown in fig. 3, the transparent cover plate 2 is connected to the inner wall of the housing 1 through a plurality of brackets 6, and a plurality of ventilation holes 3 are formed between the edge of the transparent cover plate 2 and the inner wall of the housing 1.
Specifically, support 6 can be the shape in U-shaped groove, and notch one side can press from both sides in the edge of clear cover plate 2, and tank bottom one side can set up the screw hole, then through wear to establish and revolve wrong bolt and U-shaped groove connection on the lateral wall at casing 1, and then fixes the U-shaped groove at casing 1's inner wall to and a plurality of intervals clamp are fixed clear cover plate 2 at the U-shaped groove of clear cover plate 2 border a week. Like this 2 border of transparent cover plate is the annular gap between a week and the 1 inner wall of casing, and this annular gap is cut apart by the U-shaped groove of a plurality of intervals setting, forms a plurality of ventilation holes 3.
Secondly, as shown in fig. 4, a circumference of the edge of the transparent cover plate 2 is in the shape of a wheel tooth, the inner wall of the housing 1 is provided with an installation protrusion 14, and the edge of the wheel tooth of the transparent cover plate 2 is matched with the installation protrusion 14 to form the ventilation hole 3. Or, a circle of the edge of the transparent cover plate 2 is set to be in a gear tooth shape, the inner wall of the shell 1 is provided with an installation groove, and the gear tooth-shaped edge of the transparent cover plate 2 is matched with the installation groove to form the ventilation hole 3.
Specifically, can set up a week mounting groove with casing 1 inner wall to set up casing 1 into two parts of looks lock, can insert transparent cover 2's the clamp in the mounting groove of inner wall through 1 lock of casing of two parts, the teeth of a cogwheel column structure that transparent cover 2 border a week set up promptly in the mounting groove, and then and form a plurality of spaced ventilation holes 3 through the cooperation of teeth of a cogwheel column structure and mounting groove. Or, the gear tooth-shaped structure at the edge of the transparent cover plate 2 can be provided with a connecting hole, the circumference of the inner wall of the shell 1 is provided with a mounting protrusion 14 corresponding to the gear tooth-shaped structure, the gear tooth-shaped structure of the transparent cover plate 2 is fixedly connected with the mounting protrusion 14 through a screw, and a plurality of spaced vent holes 3 can be formed.
As shown in fig. 1, in a specific implementation, a self-cleaning device 100 for a camera provided in an embodiment of the present invention further includes: an inorganic hydrophilic film 7, said inorganic hydrophilic film 7 covering a side of said transparent cover plate 2 facing away from said second side.
Specifically, the inorganic hydrophilic membrane 7 may be made of any material known to the skilled person, and may be made of, for example, nano titanium dioxide. Through add inorganic hydrophilic membrane 7 on transparent cover 2 surfaces, can destroy the tensile force on water droplet surface, make the water droplet expand on its inorganic hydrophilic membrane 7 surface, form even water film, make the water droplet and inorganic hydrophilic membrane 7's contact angle less than or equal to 10 degrees, compare and directly adhere to the water droplet on transparent cover 2 when not having inorganic hydrophilic membrane 7, the convex mirror effect who sees through transparent cover 2 is showing and is reducing, and can also be with the dust on inorganic hydrophilic membrane 7 surface, the dirt floats, the water film can quick landing under the effect of gravity, and take away the dust, realize self-cleaning ability. In addition, the air flow blown from the vent holes 3 can also accelerate the sliding of the water film.
As shown in fig. 1, in a specific implementation, a self-cleaning device 100 for a camera provided in an embodiment of the present invention further includes: and the heating component 8 is arranged on the transparent cover plate 2, and is used for heating the transparent cover plate 2.
Specifically, the transparent cover plate 2 can be heated by the heating part 8, so that frost on the transparent cover plate 2 can be further quickly melted, and the self-cleaning capability is improved. The heating unit 8 may be controlled to be heated or not by a controller provided separately, or may be controlled by directly using an overall controller of an apparatus, a vehicle, a robot, or the like to which the camera system is applied.
The implementation manner of the heating component 8 may include the following two preferable manners:
one of them, heater block 8 is annular heater strip, the heater strip integration is in inside transparent cover 2, annular heater strip is close to the edge setting of transparent cover 2, or, as shown in fig. 1, annular heater strip encircles and is established 2 border a week of transparent cover.
Specifically, the annular heating wire needs to be set up in the position that is close to 2 edges of transparent cover plate, perhaps 2 border week of transparent cover plate, avoids influencing camera module 200 inside casing 1 and sees through transparent cover plate 2 and gather the image.
Secondly, the heating part 8 is a transparent electric heating film, and the transparent electric heating film is covered on one side surface of the transparent cover plate 2 close to the second side.
Specifically, the transparent electrothermal film may be a metal oxide film, such as an ito film, which can uniformly and rapidly heat the transparent cover plate 2, thereby further improving the anti-frost self-cleaning capability of the camera self-cleaning device 100.
Example two
A camera system according to a second embodiment of the present invention includes: a camera self-cleaning device 100 as shown in fig. 1; the camera self-cleaning device 100 includes: the air conditioner comprises a shell 1, wherein a first side and a second side, opposite to the shell 1, are respectively provided with an opening 11 and an air hole 12, and the opening 11 is in a necking form; the transparent cover plate 2 is connected with the inner wall of the shell 1 close to the opening 11 to cover the opening 11, and a plurality of vent holes 3 are formed in the periphery of the edge of the transparent cover plate 2 and the inner wall of the shell 1 at intervals; a fan 4, wherein the fan 4 is arranged inside the shell 1 and close to the second side, and is used for blowing air to the first side; wherein, casing 1 is inside fan 4 with space between the transparent cover 2 is used for setting up camera module 200, just the inner wall of casing 1 with can form wind channel 5 between the camera module 200, wind channel 5 intercommunication ventilation hole 3 with gas pocket 12, the wind that fan 4 blew off loops through wind channel 5 ventilation hole 3 blew off.
Further comprising: a camera module 200; the camera module 200 is disposed inside the housing 1 of the camera self-cleaning device 100, and an air duct 5 is formed between the camera module 200 and the inner wall of the housing 1.
Specifically, the camera self-cleaning device 100 provided in the first embodiment can be directly used in the camera self-cleaning device 100 described in the second embodiment, and specific implementation structures can refer to relevant contents described in the first embodiment, and are not described herein again. The camera self-cleaning device 100 is used as glass of a vehicle window, so that the vehicle window has a transparent function and a display function.
Further, the central line of the lens of the camera module 200, the axis of the housing 1 passing through the first side and the second side, and the rotation axis of the fan 4 of the camera self-cleaning device 100 coincide with each other.
Specifically, as shown in fig. 5, the connection between the camera module 200 and the inner wall of the housing 1 may refer to the installation and fixation manner of the fan 4, and the support members may be arranged on the inner wall of the housing 1 in three directions, and then the movable support bolt may be arranged in the fourth direction, so that the camera module 200 may be installed on the central line of the housing 1, or the annular bracket 6 may be designed to support and fix the camera module 200 in the housing 1, and the camera module 200 is located on the central line of the housing 1, or other fixed installation means commonly used by technicians may be used to install the fan 4, which is not limited in the embodiment of the present invention.
According to the camera system provided by the embodiment of the invention, the camera module 200 can be accommodated in the shell 1 by additionally arranging the camera self-cleaning device 100, so that the camera module 200 shoots scenery through the transparent cover plate 2 on the first side of the shell 1, dust, water drops and water vapor are prevented from falling on the camera module 200, and particularly, the pollutants are prevented from falling on the lens of the camera module 200; in addition, an air duct 5 communicating the vent hole 3 of the first side and the air hole 12 of the second side can be formed between the camera module 200 and the inner wall of the housing 1, the camera self-cleaning device 100 is further provided with a fan 4 at a position close to the second side in the housing 1, so that wind blown out by the fan 4 can flow through the air duct 5 and blow out from the vent hole 3 of the first side, heat of the camera module 200 can be taken away, overheating of the camera module 200 is avoided, high-performance operation of the camera module 200 is ensured, the camera self-cleaning device 100 further sets the opening 11 of the first side of the housing 1 to be in a necking form, so that a part of the wind blown out from the vent hole 3 of the first side can blow on the surface of the transparent cover plate 2, dust falling on the surface of the transparent cover plate 2 can be blown away, and because the blown wind has heat of the camera module 200, water drops falling on the transparent cover, The frosting on the transparent cover plate 2 is blown to achieve a self-cleaning function, and meanwhile, a layer of air film 10 can be formed in front of the transparent cover plate 2 to prevent rainwater, dust and the like from falling on the transparent cover plate 2, so that the effect of continuously keeping the transparent cover plate 2 clean is achieved.
EXAMPLE III
A camera system control method according to a third embodiment of the present invention is stored in a controller of a camera system or a general controller of an apparatus, a vehicle, or a robot to which the camera system is applied in a program manner, and as shown in fig. 6, the camera system control method includes:
301. a first frame image is acquired.
Specifically, the image is obtained by the camera module through the transparent cover plate, and a specific method for obtaining the image by the camera module is known to a skilled person, and details are not repeated in the embodiments of the present invention.
302. And carrying out brightness detection and out-of-focus detection on the first frame image.
Specifically, because the camera self-cleaning device protects the camera module, dust, water droplet, frost, fog all fall on the camera self-cleaning device, especially fall on transparent cover plate, and then when the camera module sees through transparent cover plate and acquires the image, receive influence such as dust, water droplet, frost, fog on the transparent cover plate easily, detect through luminance and defocus and can carry out the pollutant discernment on the transparent cover plate, and then can be according to the fan work among the self-cleaning device of condition control camera that detects.
Wherein, the brightness detection: the brightness detection depends on the calculation of the mean value and the variance of the image on a gray level image, when the brightness is abnormal, the mean value can deviate from a mean value point (generally set to be 128), and the variance can be smaller; by calculating the mean and variance of the gray scale map, it is possible to evaluate whether the image is over-exposed or under-exposed. Further principles and detection methods of brightness detection are well known to those skilled in the art, and the embodiments of the present invention are not described in detail.
And (3) defocusing detection: after the frost is crystallized or water drops are attached on the transparent cover plate, the most obvious performance from the image is that the image definition is reduced, namely the image gradient is reduced, so that the defocusing detection of the image is carried out by comparing the calculated value related to the image gradient with the set value. Also, further principles and detection methods for defocus detection are well known to the skilled person, and are not described in detail in the embodiments of the present invention.
303. And judging the state of the first frame image according to the brightness detection result and the out-of-focus detection result.
Specifically, the state of the first frame image, that is, the state of the transparent cover plate, including the dust-covered state and the dust-uncovered state can be determined by luminance detection and defocus detection, and when the first frame image is in the dust-uncovered state, the fan does not need to be controlled to operate, and the first frame image is in the energy-saving state.
304. And if the first frame image is judged to be in a dust covering state, controlling the fan to start working.
Specifically, transparent cover plate surface covers has dust this moment, through control fan work, and the wind that blows out passes through the ventilation hole to blow on transparent cover plate surface under the opening effect of throat form, and then blow away dust, make the camera module can see through the clear collection image of transparent cover plate.
Further, the above steps 301-304 can be performed in a loop, and the fan is controlled to start to operate as long as the image is detected to be in the dust covering state, otherwise, the fan is controlled to stop operating when the image is detected to be in the non-dust covering state.
In a further embodiment, as shown in fig. 7, on the basis of the above method, the following further method may be used:
401. a first frame image is acquired.
402. And carrying out brightness detection and out-of-focus detection on the first frame image.
403. And judging the state of the first frame image according to the brightness detection result and the out-of-focus detection result.
404. And if the first frame image is judged to be in a dust covering state, controlling the fan to start working.
Wherein the steps 401 and 404 are the same as the steps 301 and 304.
405. And if the first frame image is judged to be in a non-dust-covering state, acquiring subsequent continuous multi-frame images, calculating an average image of the acquired multi-frame images, and performing Canny edge detection.
Specifically, in a non-dust-covered state, frost or water drops may also be formed on the surface of the transparent cover plate, so that the water drops or frost can be judged when an obvious closed edge is detected by calculating a mean image of a plurality of images and performing Canny edge detection, and further the water drops or frost can be judged by the following steps.
406. And if the closed edge envelope exists, calculating the closed edge envelope area.
407. If the envelope area exceeds the threshold value, the frosting state is judged, the fan and the heating part are controlled to start working, if the envelope area is in the threshold value range, the water drop attachment state is judged, the fan and the heating part are also controlled to start working, and if the envelope area is smaller than the threshold value range, the fan and the heating part are controlled not to work.
Specifically, after the detection and the judgment, it can be determined that water drops exist or frost is formed, and the heating component and the fan can be controlled to work, so that the water drops are evaporated or blown away, and the frost is melted and blown away.
Furthermore, the area where water drops and frost are attached can be judged through the detection, the heating part can be controlled to generate heat more when the attachment area is larger, the fan air supply intensity is controlled to be higher, and the fan air supply intensity is controlled to be smaller otherwise. In the implementation process, the heating amount of the heating part can be controlled by the voltage applied to the heating part, and the applied voltage can be positively correlated with the area size of the attached matter; similarly, the fan rotation speed is positively correlated with the area of the deposit.
By the method, the camera system can be intelligently controlled to carry out self-cleaning work, and the problems that the lens of the camera system is shielded by dust, raindrops are attached and frosted in the prior art are solved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (10)
1. A self-cleaning device of camera, its characterized in that includes:
the air conditioner comprises a shell, wherein a first side and a second side, opposite to the shell, of the shell are respectively provided with an opening and an air hole, and the opening is in a necking form;
the transparent cover plate is connected with the inner wall, close to the opening, of the shell to cover the opening, and a plurality of vent holes are formed in the periphery of the edge of the transparent cover plate and the inner wall of the shell at intervals;
the transparent cover plate is connected with the inner wall of the shell through a plurality of brackets, and a plurality of vent holes are formed between the edge of the transparent cover plate and the inner wall of the shell;
or, a circle of the edge of the transparent cover plate is in a shape of a wheel tooth, the inner wall of the shell is provided with an installation bulge, and the edge of the wheel tooth of the transparent cover plate is matched with the installation bulge to form the vent hole;
the fan is arranged in the shell and close to the second side and used for blowing air to the first side;
wherein, the casing is inside the fan with space between the transparent cover is used for setting up the camera module, just the inner wall of casing with can form the wind channel between the camera module, the wind channel intercommunication the ventilation hole with the gas pocket, the wind that the fan blew off loops through the wind channel the ventilation hole blew off.
2. The camera self-cleaning device according to claim 1,
a folded edge bent towards the middle part is arranged on the first side of the shell to form the opening in a necking form;
the angle between the folded edge and an axis passing through the first side and the second side of the shell is 30-60 degrees.
3. The camera self-cleaning device according to claim 2,
the included angle between the folded edge and the axis penetrating through the first side and the second side of the shell is 45 degrees.
4. The camera self-cleaning device according to claim 1, further comprising:
an inorganic hydrophilic membrane covering a side of the transparent cover plate facing away from the second side.
5. The camera self-cleaning device according to claim 1, further comprising:
the heating component is arranged on the transparent cover plate and used for heating the transparent cover plate.
6. The camera self-cleaning device according to claim 5,
the heating component is an annular heating wire, the heating wire is integrated in the transparent cover plate, the annular heating wire is arranged close to the edge of the transparent cover plate, or the annular heating wire is annularly arranged on the periphery of the edge of the transparent cover plate;
or the heating part is a transparent electric heating film, and the transparent electric heating film is covered on one side surface of the transparent cover plate close to the second side.
7. A camera system, comprising:
a camera self-cleaning device as claimed in any one of claims 1 to 6;
a camera module;
the camera module is arranged inside a shell of the camera self-cleaning device, and an air duct is formed between the camera module and the inner wall of the shell.
8. The camera system according to claim 7,
the center line of the lens of the camera module, the axis of the shell penetrating through the first side and the second side and the rotation axis of the fan of the camera self-cleaning device are overlapped.
9. A camera system control method for use in the camera system of claim 7 or 8, characterized by comprising:
acquiring a first frame image;
performing brightness detection and out-of-focus detection on the first frame image;
judging the state of the first frame image according to the results of the brightness detection and the out-of-focus detection;
and if the first frame image is judged to be in a dust covering state, controlling the fan to start working.
10. The camera system control method according to claim 9,
if the first frame image is judged to be in a non-dust-covered state, acquiring subsequent continuous multi-frame images, calculating an average image of the acquired multi-frame images and performing Canny edge detection;
if the closed edge envelope exists, calculating the closed edge envelope area;
if the envelope area exceeds the threshold value, the frosting state is judged, the fan and the heating part are controlled to start working, if the envelope area is in the threshold value range, the frosting state is judged, the fan and the heating part are also controlled to start working, and if the envelope area is smaller than the threshold value range, the fan and the heating part are controlled not to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764564.8A CN111741206B (en) | 2020-08-03 | 2020-08-03 | Camera self-cleaning device, camera system and camera system control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764564.8A CN111741206B (en) | 2020-08-03 | 2020-08-03 | Camera self-cleaning device, camera system and camera system control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111741206A CN111741206A (en) | 2020-10-02 |
| CN111741206B true CN111741206B (en) | 2021-01-08 |
Family
ID=72656889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010764564.8A Active CN111741206B (en) | 2020-08-03 | 2020-08-03 | Camera self-cleaning device, camera system and camera system control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111741206B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115308977B (en) * | 2022-08-04 | 2023-07-25 | 中冶赛迪信息技术(重庆)有限公司 | Cyclone camera sight purge cylinder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB794945A (en) * | 1955-07-16 | 1958-05-14 | Fernseh Gmbh | Improvements in or relating to television cameras |
| CN204013835U (en) * | 2014-09-04 | 2014-12-10 | 江苏敏佳电子科技股份公司 | A kind of monopod video camera of tool demist airway dysfunction |
| CN104834159A (en) * | 2015-05-28 | 2015-08-12 | 浙江宇视科技有限公司 | Camera and infrared lamp fixing seat used for the same |
| CN108732849A (en) * | 2018-09-05 | 2018-11-02 | 广州南泽电子科技有限公司 | A kind of camera lens demister system of parking lot entrance identification video camera |
| CN208063315U (en) * | 2018-04-09 | 2018-11-06 | 武汉轻购云科技有限公司 | A kind of camera demister of intelligence sales counter |
| CN208862955U (en) * | 2018-10-25 | 2019-05-14 | 图灵通诺（北京）科技有限公司 | A kind of anti-condensation image collecting device |
-
2020
- 2020-08-03 CN CN202010764564.8A patent/CN111741206B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB794945A (en) * | 1955-07-16 | 1958-05-14 | Fernseh Gmbh | Improvements in or relating to television cameras |
| CN204013835U (en) * | 2014-09-04 | 2014-12-10 | 江苏敏佳电子科技股份公司 | A kind of monopod video camera of tool demist airway dysfunction |
| CN104834159A (en) * | 2015-05-28 | 2015-08-12 | 浙江宇视科技有限公司 | Camera and infrared lamp fixing seat used for the same |
| CN208063315U (en) * | 2018-04-09 | 2018-11-06 | 武汉轻购云科技有限公司 | A kind of camera demister of intelligence sales counter |
| CN108732849A (en) * | 2018-09-05 | 2018-11-02 | 广州南泽电子科技有限公司 | A kind of camera lens demister system of parking lot entrance identification video camera |
| CN208862955U (en) * | 2018-10-25 | 2019-05-14 | 图灵通诺（北京）科技有限公司 | A kind of anti-condensation image collecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111741206A (en) | 2020-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6304205B2 (en) | In-vehicle imaging device | |
| US9871971B2 (en) | Vehicle vision system with light baffling system | |
| CN111741206B (en) | Camera self-cleaning device, camera system and camera system control method | |
| CN110435400A (en) | Automotive sunshade panel automatic regulating system based on image recognition | |
| JP4798015B2 (en) | Anti-glare control device | |
| CN109910567B (en) | Intelligent sun shading device for automobile and control method thereof | |
| CN112470060A (en) | Head-up display | |
| JP5152019B2 (en) | Vehicle control device | |
| JP6302610B1 (en) | Awning device | |
| CN111791834A (en) | Automobile and defogging method and device thereof | |
| CN112208469B (en) | Automobile driver sight management system | |
| CN214591617U (en) | Integrated industrial camera | |
| CN109278647B (en) | Automobile rearview mirror with rain-proof defogging function | |
| KR102019257B1 (en) | A frame image display device for providing a blind spot image of an a-pillar frame of a vehicle | |
| CN110709283B (en) | Reflector | |
| JP2004189188A (en) | Displaying device for vehicle | |
| JP2006137209A (en) | Anti-glare device for vehicle | |
| JP3531482B2 (en) | Automatic defroster device | |
| JP2001317996A (en) | Infrared camera housing | |
| CN109987035A (en) | A kind of new-energy automobile supplemental rear vision device | |
| KR20180060271A (en) | Rear image acquisition apparatus for vehicle having functions of anti-droplet and anti-frost | |
| KR200474039Y1 (en) | Housing for watch camera | |
| CN219904250U (en) | Front view camera and front windshield cleaning system applied to vehicle and vehicle | |
| CN108859976A (en) | A kind of rearview mirror camera keeps off the rain Anti-wet system | |
| KR20200084470A (en) | Intelligent side view camera system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |