CN111624834B - Light supplement device - Google Patents
Light supplement device Download PDFInfo
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- CN111624834B CN111624834B CN201910146932.XA CN201910146932A CN111624834B CN 111624834 B CN111624834 B CN 111624834B CN 201910146932 A CN201910146932 A CN 201910146932A CN 111624834 B CN111624834 B CN 111624834B
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- infrared filter
- light
- cup
- reflecting cup
- adjustable
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
Abstract
The embodiment of the invention provides a light supplementing device, wherein when an infrared filter control mechanism receives a first switching signal, the infrared filter control mechanism drives an adjustable infrared filter to partially cover the cup mouth of a reflecting cup; when infrared filter control mechanism received first switching signal, according to the second switching signal of receiving, drive adjustable infrared filter is whole to be covered reflection of light cup rim of a cup, can explode the white light that the flashing light source explodes the flashing light filling with the white light and filter the infrared light for carrying out exploding the flashing light filling, because the infrared light that the white light explodes the flashing light source and obtains after adjustable infrared filter filters is higher than infrared LED's illumination intensity, consequently, under the environment at night, can improve the illumination intensity when the light filling.
Description
Technical Field
The invention relates to a light supplementing device.
Background
At present, in order to make a camera shoot a clearer image, a light supplementing device with a flashing function is equipped for the camera in many application fields. For example: in the traffic monitoring system, because images need to be continuously shot for 24 hours, a light supplementing device is arranged for a monitoring camera in order to shoot clear images.
In the traffic monitoring system, a camera is installed on a traffic support, and a light supplementing device is installed on the same traffic support at a preset distance from the camera through a universal joint on a shell. In the prior art, various light supplement devices are provided for a monitoring camera. The common type is to use a white light flash light source and an infrared LED (light emitting diode) light source for light supplement. For example, as shown in fig. 1, the light supplement device 120 includes: a white light gas discharge lamp tube 121 as a white light flash light source and an infrared LED 122. In a daytime environment, when the monitoring camera 110 needs to shoot an image, a first light supplement trigger signal is sent to the light supplement device 120, and the white light gas discharge lamp tube 121 is turned on to supplement light. In a night environment, when the monitoring camera 110 needs to capture an image, a second supplementary lighting trigger signal is sent to the supplementary lighting device 120, and the infrared LED122 is turned on for supplementary lighting.
For safety reasons, it is generally required that the captured picture clearly shows the condition of the cab and the facial features of the front row of passengers. However, when the infrared LED performs light compensation, the illumination intensity itself is low, and a heat insulation film having a light blocking effect is generally attached to the front windshield of many vehicles, which reduces the illumination intensity. In this case, the image captured in the nighttime environment is not so sharp that the driver's cab and the facial features of the front-row occupants cannot be clearly displayed.
Disclosure of Invention
The embodiment of the invention aims to provide a light supplementing device and a light supplementing method, so as to improve the illumination intensity during light supplementing in a night environment. The specific technical scheme is as follows:
in order to achieve the above object, an embodiment of the present invention provides a light supplement device, including: the device comprises a white light explosion flash light source, a reflecting cup, an adjustable infrared filter and an infrared filter control mechanism;
the white light flashing light source is arranged at the bottom of the inner part of the reflecting cup, faces the cup mouth of the reflecting cup and is used for flashing and light supplementing when receiving a first light supplementing trigger signal;
the adjustable infrared filter is arranged at the cup mouth of the reflecting cup, is connected with the infrared filter control mechanism, and is used for partially covering the cup mouth of the reflecting cup or completely covering the cup mouth of the reflecting cup under the driving of the infrared filter control mechanism;
the infrared filter control mechanism is used for driving the adjustable infrared filter to partially cover the cup mouth of the reflecting cup according to the received first switching signal; or driving the adjustable infrared filter to completely cover the cup mouth of the reflecting cup according to the received second switching signal.
Further, the tunable infrared filter includes: a first infrared filter and a second infrared filter;
the first infrared filter is matched with the cup opening of the reflecting cup in shape, is provided with a plurality of through holes and is fixedly arranged on the cup opening of the reflecting cup;
the shape of the second infrared filter is matched with the through holes, and the position of the second infrared filter can be switched between a first position and a second position under the driving of the infrared filter control mechanism, wherein the first position does not cover all the through holes of the first infrared filter, and the second position covers all the through holes of the first infrared filter;
the infrared filter control mechanism is specifically used for driving a second infrared filter in the adjustable infrared filter to not cover each through hole of the first infrared filter according to the received first switching signal, so that the adjustable infrared filter partially covers the cup mouth of the reflecting cup; or driving a second infrared filter in the adjustable infrared filter to cover each through hole of the first infrared filter according to the received second switching signal, so that the adjustable infrared filter completely covers the cup mouth of the reflecting cup.
Furthermore, each through hole of the first infrared filter is a single fan-shaped annular through hole, and the through holes are uniformly distributed around the center of the first infrared filter; the shape of the second infrared filter is a multi-fan ring shape which is matched with each single fan ring-shaped through hole of the first infrared filter and is connected with a plurality of fan rings;
the infrared filter control mechanism is as follows: controlling the motor;
the control motor is arranged on one side, facing the cup opening, of the first infrared filter, and the central axis of the control motor penetrates through the center of the first infrared filter and is connected to the center of the second infrared filter; the second infrared filter is driven to rotate to the first position when a first switching signal is received; or when a second switching signal is received, the second infrared filter sub-sheet is driven to rotate to the second position.
Further, the apparatus further includes: a photosensitive sensor;
the photosensitive sensor is electrically connected with the control motor and used for sending an opening signal to the control mechanism when the light intensity is higher than a preset threshold value and sending a closing signal to the infrared filter control mechanism when the light intensity is lower than the preset threshold value;
the control motor is started when receiving a starting signal to drive the second infrared filter to rotate to the first position; or when receiving the closing signal, the second infrared filter is driven to rotate to the second position.
Further, the white light flashing light source is connected with a trigger device capable of generating a first supplementary lighting trigger signal, and receives the first supplementary lighting trigger signal sent by the trigger device to perform flashing supplementary lighting; the trigger device includes: a camera or non-camera device;
the infrared filter control mechanism is connected with the camera and used for driving the adjustable infrared filter to partially cover the cup mouth of the reflecting cup according to a first switching signal received from the camera; or the adjustable infrared filter is driven to completely cover the cup mouth of the reflecting cup according to a second switching signal received from the camera.
Further, the apparatus further includes: the white light LED is arranged around the outer side of the cup opening of the reflecting cup;
the white light LED is used for carrying out LED stroboscopic light supplement when receiving a second light supplement trigger signal; or carrying out LED explosion flash light supplement when receiving a third light supplement trigger signal.
Further, the white light LED is connected with the camera and used for carrying out LED stroboscopic light supplementing when receiving a second light supplementing trigger signal sent by the camera; or carrying out LED flashing light supplement when a third light supplement trigger signal sent by the camera is received.
Further, the apparatus further includes: the front shell is used for installing the white light flashing light source, the reflecting cup, the adjustable infrared filter and the infrared filter control mechanism; and a rear housing for mounting a circuit board; the LED lamp comprises an annular LED lamp substrate surrounding the cup opening of the reflecting cup, a lens support corresponding to the annular LED lamp substrate in position, and an annular LED lamp pressing plate with a light through hole;
the front shell is of a funnel-shaped structure, a boss is arranged in a top opening of a funnel of the front shell, a reflecting cup mounting space is formed on the inner side of the boss in the funnel, and the outer side of the boss is used for fixedly mounting the LED lamp substrate;
the rear shell is connected with the bottom of the funnel;
the annular LED lamp substrate is arranged on the surface of the boss of the front shell;
the white light LED is arranged on the annular LED lamp substrate and faces towards the adjustable infrared filter;
the lens support is arranged on the annular LED lamp substrate;
the annular LED lamp pressing plate is arranged on the lens bracket;
the cup mouth of the reflecting cup is positioned on the annular LED lamp pressing plate;
white light transmission through holes are formed in the periphery of the adjustable infrared filter, and the shape and the position of each white light transmission through hole correspond to those of the lens support.
Furthermore, the inner curved surface of the light reflecting cup is obtained by calculation according to the range of the shooting scene and an aspheric equation, and the inner part of the light reflecting cup is a smooth curved surface or a petal stripe type scale.
According to the light supplementing device provided by the embodiment of the invention, when the infrared filter control mechanism receives a first switching signal, the adjustable infrared filter is driven to partially cover the cup mouth of the reflecting cup; when infrared filter control mechanism received first switching signal, according to the second switching signal of receiving, drive adjustable infrared filter is whole to be covered reflection of light cup rim of a cup, can explode the white light that the flash light source explodes the flash light source and explode the white light of light filling and filter the infrared light for exploding the flash light filling, because the white light explodes the flash light source and filters the infrared light that obtains after the infrared LED's of infrared light ratio illumination intensity height, consequently, for prior art, under the condition that needs carry out infrared light filling, for example: under the night environment, the illumination intensity during light supplement can be improved.
Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic circuit diagram of a light supplement device according to the prior art;
fig. 2 is an exploded view of a structure of a light supplement device according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of the light supplement device in the embodiment shown in fig. 2;
FIG. 4 is an enlarged view of an adjustable filter of the light supplement device shown in FIG. 2;
fig. 5 is an exploded view illustrating another structure of a light supplement device according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of the embodiment shown in FIG. 5;
FIG. 7a is a schematic structural view of the reflector cup of the embodiment shown in FIG. 5;
FIG. 7b is a schematic diagram of the optical path of the reflector cup shown in FIG. 7 a;
FIG. 8a is a schematic view of another structure of the reflector cup in the embodiment of FIG. 5;
FIG. 8b is a schematic diagram of the optical path of the reflector cup shown in FIG. 8 a;
fig. 9 is a schematic circuit diagram of the light supplement device of the embodiment shown in fig. 5;
fig. 10 is a schematic circuit diagram of another circuit of the light supplement device in the embodiment shown in fig. 5;
fig. 11 is a schematic circuit diagram of another circuit of the light supplement device in the embodiment shown in fig. 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problems that the definition of a picture shot in a night environment is not high, and the conditions of a cab and facial features of drivers and passengers in front rows cannot be clearly displayed, the embodiment of the invention provides a light supplementing device.
As shown in fig. 2, the light supplement device includes: a white light flash light source 201, a reflective cup 202, an adjustable infrared filter 203 and an infrared filter control mechanism 204,
the white light flashing light source 201 is arranged at the bottom of the inner part of the reflecting cup 202, faces the cup mouth of the reflecting cup and is used for flashing and light supplementing when receiving a first light supplementing trigger signal;
the adjustable infrared filter 203 is arranged at the cup opening of the reflecting cup 202, is connected with the infrared filter control mechanism 204, and is used for partially covering the cup opening of the reflecting cup 202 or completely covering the cup opening of the reflecting cup 202 under the driving of the infrared filter control mechanism 204;
the infrared filter control mechanism 204 is used for driving the adjustable infrared filter 203 to partially cover the cup mouth of the reflecting cup according to the received first switching signal; or the adjustable infrared filter 203 is driven to completely cover the cup mouth of the reflecting cup 202 according to the received second switching signal.
Specifically, when the infrared filter control mechanism 204 receives the first switching signal, the adjustable infrared filter 203 is driven to partially cover the cup opening of the reflective cup 202, and the white light emitted by the white light flashing light source 201 can pass through the cup opening area of the reflective cup which is not covered by the adjustable infrared filter 203, so that white light flashing and light supplementing are performed; when the infrared filter control mechanism 204 receives the second switching signal, the adjustable infrared filter 203 is driven to completely cover the cup mouth of the reflective cup, and the white light emitted by the white light explosion flash light source 201 is filtered by the adjustable infrared filter and then is converted into infrared light, so that infrared explosion flash light supplement is performed. The infrared filter control mechanism 204 in this embodiment may be a control motor.
The white light flashing light source 201 in this embodiment may be a light source with high intensity light, such as a white light gas discharge lamp.
In this embodiment, in order to improve the image quality of an image captured by the monitoring camera and reduce red exposure and color cast, the infrared filter may be made of a high temperature resistant PC material with good infrared wavelength transmittance, and allow infrared light of about 730nm to pass through. Wherein, the red exposure phenomenon refers to: the filter can not completely filter the visible light, so that part of visible red light is received by human eyes.
According to the light supplementing device provided by the embodiment of the invention, when the infrared filter control mechanism 204 receives the first switching signal, the adjustable infrared filter 203 is driven to partially cover the cup mouth of the reflecting cup; when the infrared filter control mechanism 204 receives the first switching signal, the adjustable infrared filter 203 is driven to completely cover the cup mouth of the reflective cup 202 according to the received second switching signal, so that the white light of the white light explosion flash light source 201 can be filtered into the infrared light for explosion flash light supplement, and the infrared light obtained after the white light explosion flash light source 201 is filtered by the adjustable infrared filter is higher than the illumination intensity of the infrared LED, so that the illumination intensity during light supplement can be improved in a night environment. Meanwhile, the white light of the white light flashing light source is filtered into infrared light, so that the problems of instantaneous dazzling and dazzling of drivers caused by sudden strong flashing of the white light flashing light source at night can be avoided, and potential safety hazards are eliminated.
Optionally, referring to fig. 2 and 4, the tunable infrared filter may include: a first infrared filter 2032 and a second infrared filter 2031;
the shape of the first infrared filter 2032 is matched with the cup mouth of the reflecting cup, and the first infrared filter 2032 is provided with a plurality of through holes 20321 and is fixedly arranged at the cup mouth of the reflecting cup;
the second infrared filter 2031 is shaped to fit the through holes and can be switched between a first position and a second position under the drive of the infrared filter control mechanism, wherein the first position does not cover each through hole 20321 of the first infrared filter, and the second position covers all the through holes 20321 of the first infrared filter;
the infrared filter control mechanism is specifically configured to drive the second infrared filter 2031 in the adjustable infrared filter to uncover each through hole 20321 of the first infrared filter 2032 according to the received first switching signal, so that the adjustable infrared filter partially covers the cup mouth of the reflective cup; or according to the received second switching signal, the second infrared filter 2031 in the adjustable infrared filter is driven to cover each through hole 20321 of the first infrared filter 2032, so that the adjustable infrared filter completely covers the cup mouth of the reflective cup.
Optionally, each through hole 20321 of the first infrared filter 2032 is a single fan-shaped annular through hole, and each through hole 20321 is uniformly arranged around the center of the first infrared filter 2032; the second infrared filter 2031 is shaped like a multi-fan ring which is matched with each single-fan ring through hole of the first infrared filter 2032 and is connected with a plurality of fan rings;
as shown in fig. 2, the infrared filter control mechanism 204 may be: controlling the motor;
the control motor is arranged on one side, facing the cup opening, of the first infrared filter, the central axis of the control motor penetrates through the center of the first infrared filter and is connected to the center of the second infrared filter; the second infrared filter is driven to rotate to a first position when the first switching signal is received; or when receiving the second switching signal, the second infrared filter is driven to rotate to the second position.
Referring to fig. 3, in the light supplement device 220 of this embodiment, the white light flashing light source 201 flashes and supplements light when receiving the first light supplement trigger signal, and the infrared filter control mechanism 204 drives the adjustable infrared filter 203 to partially cover/completely cover the cup mouth of the reflective cup by receiving the first switching signal/the second switching signal, so as to flash and supplement light for white light flashing/flash and supplement light for infrared flashing.
Fig. 4 is an enlarged view of the first infrared filter 2032 and the second infrared filter 2031, wherein positioning grooves are formed on two sides of each fan ring of the second infrared filter 2031, positioning holes for installing positioning posts are formed in the corresponding positions of the first infrared filter 2032, and in the light supplement process, the motor controls the second infrared filter 2031 to rotate to the first position/the second position according to the received first switching signal/second switching signal, and the positioning holes are matched with the positioning grooves, so that the problem that the second infrared filter 2031 does not rotate in place can be avoided.
Optionally, the light supplement device may further include: a photosensitive sensor;
the photosensitive sensor can be electrically connected with the control motor and is used for sending an opening signal to the control mechanism when the light intensity is higher than a preset threshold value and sending a closing signal to the infrared filter control mechanism when the light intensity is lower than the preset threshold value;
the control motor is started when receiving the starting signal and drives the second infrared filter to rotate to the first position; or when receiving the closing signal, the second infrared filter is driven to rotate to the second position.
Specifically, in this embodiment, photosensitive sensor can inlay in the light filling device shell, and when light intensity was higher than the predetermined threshold value, photosensitive sensor can send opening signal to control mechanism to make the control motor drive the rotatory first position to of the second infrared filter piece in the adjustable infrared filter, promptly: the positions of the through holes of the first infrared filter are not covered; when light intensity is lower than the preset threshold value, the photosensitive sensor can send a closing signal to the control mechanism, so that the control motor drives the second infrared filter in the adjustable infrared filter to rotate to a second position, namely: covering the positions of the respective through holes of the first infrared filter.
Optionally, the white light flashing light source is connected to a trigger device capable of generating a first supplementary lighting trigger signal, and receives the first supplementary lighting trigger signal sent by the trigger device to perform flashing supplementary lighting; a trigger device, comprising: a camera or non-camera device;
the infrared filter control mechanism is connected with the camera and used for driving the adjustable infrared filter to partially cover the cup mouth of the reflecting cup according to a first switching signal received from the camera; or the adjustable infrared filter is driven to completely cover the cup mouth of the reflecting cup according to a second switching signal received from the camera.
Specifically, the non-camera device in this embodiment may be other trigger devices capable of generating the first fill-in light trigger signal, such as a radar and a laser sensor.
Optionally, referring to fig. 5 and 6, the light supplement device may further include: a white light LED509 installed around the outside of the rim of the reflecting cup 507;
a white light LED509, configured to perform LED stroboscopic light supplement when receiving the second light supplement trigger signal; or carrying out LED explosion flash light supplement when receiving a third light supplement trigger signal.
Can adopt high-power warm white LED lamp pearl light source in this embodiment to under the prerequisite that reduces the amazing degree of people's eye, realize LED stroboscopic light filling or explode and dodge the light filling.
Specifically, the second supplementary lighting trigger signal and the third supplementary lighting trigger signal may include information such as a luminance parameter and supplementary lighting duration of the white LED light source. Under the condition of bright light in the daytime, the white light LED509 may receive a second fill light trigger signal to perform LED stroboscopic fill light, or may receive a third fill light trigger signal to perform LED burst flash fill light; when light was darker night, dazzling and dazzling's problem in the twinkling of an eye for avoiding the navigating mate that the LED explodes and dodges and cause carries out LED stroboscopic light filling when receiving second light filling triggering signal.
When only infrared light is used for light supplement, a shot picture is black and white, but in many application scenes of light supplement devices, a colorful picture needs to be shot, for example, in a traffic monitoring scene, because license plates have multiple colors, when license plate recognition is performed, not only the number of the license plate needs to be recognized, but also the color of the license plate needs to be recognized, and therefore, a black and white mode cannot be used. At this time, a white light LED stroboscopic and white light flashing light source, such as a white light gas discharge lamp tube light source, can be adopted, and infrared light obtained after filtering by the adjustable infrared filter flashes and is supplemented with light, so that a clear color picture is obtained in a night environment.
Optionally, the white light LED509 is connected to the camera, receives control of the camera, and is configured to perform LED stroboscopic light supplement when receiving a second light supplement trigger signal sent by the camera; or carrying out LED flashing light supplement when a third light supplement trigger signal sent by the camera is received.
Specifically, when the camera detects that a person or an object moves within a preset range, a second supplementary lighting trigger signal/a third supplementary lighting trigger signal may be sent to the white light LED506 to control the white light LED506 to supplement lighting; when the preset time is reached, a second supplementary lighting trigger signal/a third supplementary lighting trigger signal is sent to the white light LED506 to control the white light LED506 to supplement lighting; when the camera receives a certain artificial operation signal, a second fill-in light trigger signal/a third fill-in light trigger signal may be sent to the white light LED506 to control the white light LED506 to fill in light, and the trigger condition for sending the second fill-in light trigger signal/the third fill-in light trigger signal by the camera is not limited herein.
Optionally, the light supplement device further includes: the front shell is used for installing a white light flashing light source, a reflecting cup, an adjustable infrared filter and an infrared filter control mechanism; and a rear housing for mounting a circuit board; the LED lamp comprises an annular LED lamp substrate surrounding the cup opening of the reflecting cup, a lens support corresponding to the annular LED lamp substrate in position, and an annular LED lamp pressing plate with a light through hole;
the front shell is of a funnel-shaped structure, a boss is arranged in a top opening of a funnel of the front shell, a reflecting cup mounting space is formed on the inner side of the boss in the funnel, and the outer side of the boss is used for fixedly mounting an LED lamp substrate;
the rear shell is connected with the bottom of the funnel;
the annular LED lamp substrate is arranged on the surface of the boss of the front shell;
the white light LED faces the adjustable infrared filter and is arranged on the annular LED lamp substrate;
the lens support is arranged on the annular LED lamp substrate;
the annular LED lamp pressing plate is arranged on the lens bracket;
the cup mouth of the reflecting cup is positioned on the annular LED lamp pressing plate;
the periphery of the adjustable infrared filter is provided with a white light transmission through hole, and the shape and the position of the white light transmission through hole correspond to the shape and the position of the lens support.
The white light flashing light source and the lens support are placed in the middle of the front shell of the light supplementing device, the white light LED is fixed on the annular LED lamp substrate and surrounds the periphery of the reflecting cup, so that a plurality of devices can be installed in a double-light-source small space, and the heat dissipation problem of the annular LED lamp substrate is solved; the double light sources use the same power supply for power supply, and the light supplement requirement can be met.
The light supplementing device in the embodiment of the invention is adopted for supplementing light, other light supplementing equipment is not needed any more, the cost can be saved, the material waste is reduced, the number of the light supplementing devices is effectively reduced, and the phenomenon that a plurality of light supplementing equipment are needed to be installed on one traffic support because one monitoring camera needs to supplement light, and a sparrow rod is avoided.
In the embodiment of the invention, optionally, the inner curved surface of the light reflecting cup can be obtained by calculation according to the range of the shooting scene and an aspheric equation, and the inner part of the light reflecting cup can be a smooth curved surface or a petal stripe type scale.
Specifically, the material of the reflecting cup can be aluminum, the spinning production mode is adopted, and the inner surface is electroplated and polished.
Specifically, considering the smoothness and uniformity of light, the curved surface of the reflective cup is designed according to an aspheric equation, the symmetric axis of the aspheric surface is set as the Z axis, i.e. the optical axis in imaging optics, and the origin of coordinates is set at the vertex, then the aspheric equation can be written as:
wherein r is2＝x2+y2(ii) a Z (r) is the sag of the aspheric surface; r is the aperture radius of the aspheric surface; c is the reciprocal of the radius of curvature; k is a conic coefficient; a is each order coefficient of r;
when a is 0, the aspheric surface becomes a quadric surface, and the equation can be abbreviated as:
in practical application, parameters in the quadric surface formula can be optimized according to requirements such as a shooting scene, a coverage range of the light supplementing device and the like, and finally the curved surface profile of the light reflecting cup meeting the requirements is obtained.
Under the condition that the curved surface contour of the light reflecting cup is determined, the light supplementing device capable of covering a single lane or multiple lanes can be designed by changing the surface shape of the light reflecting cup according to specific requirements.
In the single lane light supplement device, a reflective cup with a smooth curved surface inside can be adopted, and the specific reflective cup structure is shown in fig. 7 a. A single lane may be covered using the reflector cup of fig. 7a, with the light path shown in fig. 7b, and fig. 7b is a diagram of the light path formed by the reflector cup of fig. 7 a. As shown in fig. 7b, the light emitted from the white light flashing light source is reflected by the reflector cup, so that a single lane with a certain width can be illuminated.
In the multi-lane light supplement device, a light reflecting cup with petal stripe type scale nails inside can be adopted, the specific structure of the light reflecting cup refers to fig. 8a, the petal stripe type scale nails inside the light reflecting cup are treated, the incident angle of the light of the white light explosion flash light source on the light reflecting cup is changed, the propagation path of the light is further changed, and the light of the light source is irradiated to the lane in a relatively divergent mode, so that the purpose of multi-lane light supplement is achieved, as shown in fig. 8b, and fig. 8b is a light path diagram formed by the light reflecting cup shown in fig. 8 a.
The single-lane light supplement device with the smooth curved surface reflective cup can clearly see information in a vehicle window because energy is concentrated in a single lane, and therefore the device can be applied to items with harsh requirements on the information of the vehicle window; the multilane light supplementing device with the petal strip type squama reflecting cup can obtain vehicle window information in a multilane range, and can be adopted in projects that vehicle windows are not very strict or light spots are required to cover 2 to 3 lanes.
Scattered light exists around the light spot of the traditional flash lamp, a specific xenon discharge lamp tube can be selected as a white light explosion flash light source in the embodiment of the invention, and meanwhile, the special optical reflection cup designed by the scheme is matched, so that the shape of the light supplementing light spot can be accurately controlled, the illumination and the uniformity of the light supplementing light spot are further improved, and the light energy utilization rate is increased.
Referring to fig. 9, a circuit principle of the light supplement device of the embodiment shown in fig. 5 and 6 may be: the monitoring camera provides a first supplementary lighting trigger signal for controlling the white light flashing light source to be started and a second supplementary lighting trigger signal/a third supplementary lighting trigger signal for controlling the white light LED light source to carry out stroboscopic supplementary lighting/flashing supplementary lighting; a photosensitive sensor in the light supplementing device provides a first switching signal/a second switching signal for controlling the motor, so that the motor controls the rotation of the adjustable infrared filter.
By the circuit principle shown in fig. 9, multiple modes of light supplement can be realized:
the LED flash lighting device comprises an LED flash lighting mode, an LED stroboscopic mode, a white light flash lighting mode and a mode for simultaneously supplementing light for infrared flash lighting and LED stroboscopic lighting.
Wherein, LED explodes sudden strain of a muscle mode and LED stroboscopic mode: the method can be realized by sending a second supplementary lighting trigger signal or a third supplementary lighting trigger signal to the white light LED light source through the monitoring camera.
White light flashing mode: the method can be realized by sending a first supplementary lighting trigger signal to a white light flashing light source through a monitoring camera;
the mode of infrared sudden strain of a muscle and LED stroboscopic while light filling can be realized through following process: the monitoring camera sends a first supplementary lighting trigger signal to the white light flashing light source to enable the white light flashing light source to carry out flashing supplementary lighting; when the light intensity is lower than the preset threshold value, the photosensitive sensor in the light supplementing device sends a closing signal to the infrared filter control mechanism, so that the photosensitive sensor drives the second infrared filter in the adjustable infrared filter to cover each through hole of the first infrared filter, the adjustable infrared filter covers the cup mouth of the reflecting cup, white light emitted by the white light flashing light source is filtered into infrared light with the wavelength of about 730nm, and the mode of supplementing light simultaneously through infrared flashing and LED stroboscopic is realized.
The mode that the infrared flashing and the LED stroboscopic light supplementing are carried out is adopted for light supplementing, and the novel light supplementing device has the innovative significance of solving the problem of light pollution caused by the flashing of white light gas at night in the traffic monitoring industry and simultaneously realizing the snapshot of color pictures at night.
Referring to fig. 10, another circuit principle of the light supplement device of the embodiment shown in fig. 5 and 6 may be: the monitoring camera provides a first supplementary lighting trigger signal for controlling the white light flashing light source to be started and a second supplementary lighting trigger signal/a third supplementary lighting trigger signal for controlling the white light LED light source to carry out stroboscopic supplementary lighting/flashing supplementary lighting; meanwhile, the monitoring camera also provides a first switching signal/a second switching signal for controlling the motor, so that the motor controls the rotation of the adjustable infrared filter.
Specifically, the surveillance camera machine can detect whether or not there is the activity of people or thing in the control range simultaneously when taking a candid photograph, if detect in the control range that there is the activity of people or thing then provide the first light filling trigger signal that the control white light explodes the flashing light source and opens.
The circuit principle shown in fig. 10 can also realize LED flashing mode light supplement, LED stroboscopic mode light supplement, white light flashing mode light supplement, infrared flashing and LED stroboscopic simultaneous light supplement.
Compared with the circuit shown in fig. 9, the circuit principle shown in fig. 10 is that a photosensitive sensor inside a supplementary lighting center which sends a switching signal to a motor is replaced by a monitoring camera.
Referring to fig. 11, another circuit principle of the light supplement device of the embodiment shown in fig. 5 and 6 may be: non-camera equipment such as a radar and a laser sensor provides a first supplementary lighting trigger signal for controlling the white light flashing light source to be started, and a monitoring camera provides a second supplementary lighting trigger signal/a third supplementary lighting trigger signal for controlling the white light LED light source to carry out stroboscopic supplementary lighting/flashing supplementary lighting; meanwhile, the monitoring camera also provides a first switching signal/a second switching signal for controlling the motor, so that the motor controls the rotation of the adjustable infrared filter.
Compared with the circuit shown in fig. 9, in the principle of the circuit shown in fig. 11, a photosensitive sensor inside a light supplement center which sends a switching signal to a motor is replaced by a monitoring camera; and replacing the monitoring camera which provides the first supplementary lighting trigger signal for the white light flashing light source with other non-camera equipment such as a radar and a laser sensor.
Therefore, by applying the light supplement device provided by the embodiments shown in fig. 9 to 11, not only can the illumination intensity during light supplement be improved under the condition that infrared light supplement is needed, but also the LED flashing mode, the LED stroboscopic mode, the white light flashing mode and the mode that infrared flashing and LED stroboscopic light supplement are performed simultaneously can be realized, and the light supplement of the multiple modes has a wider application range.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (9)
1. A light supplement device, comprising: the device comprises a white light explosion flash light source, a reflecting cup, an adjustable infrared filter and an infrared filter control mechanism;
the white light flashing light source is arranged at the bottom of the inner part of the reflecting cup, faces the cup mouth of the reflecting cup and is used for flashing and light supplementing when receiving a first light supplementing trigger signal;
the adjustable infrared filter is arranged at the cup mouth of the reflecting cup, is connected with the infrared filter control mechanism, and is used for partially covering the cup mouth of the reflecting cup or completely covering the cup mouth of the reflecting cup under the driving of the infrared filter control mechanism;
the infrared filter control mechanism is used for driving the adjustable infrared filter to partially cover the cup mouth of the reflecting cup according to the received first switching signal; or driving the adjustable infrared filter to completely cover the cup mouth of the reflecting cup according to the received second switching signal.
2. The apparatus of claim 1,
the adjustable infrared filter comprises: a first infrared filter and a second infrared filter;
the first infrared filter is matched with the cup opening of the reflecting cup in shape, is provided with a plurality of through holes and is fixedly arranged on the cup opening of the reflecting cup;
the shape of the second infrared filter is matched with the through holes, and the position of the second infrared filter can be switched between a first position and a second position under the driving of the infrared filter control mechanism, wherein the first position does not cover all the through holes of the first infrared filter, and the second position covers all the through holes of the first infrared filter;
the infrared filter control mechanism is specifically used for driving a second infrared filter in the adjustable infrared filter to not cover each through hole of the first infrared filter according to the received first switching signal, so that the adjustable infrared filter partially covers the cup mouth of the reflecting cup; or driving a second infrared filter in the adjustable infrared filter to cover each through hole of the first infrared filter according to the received second switching signal, so that the adjustable infrared filter completely covers the cup mouth of the reflecting cup.
3. The apparatus of claim 2,
each through hole of the first infrared filter is a single fan-shaped annular through hole, and the through holes are uniformly distributed around the center of the first infrared filter; the shape of the second infrared filter is a multi-fan ring shape which is matched with each single fan ring-shaped through hole of the first infrared filter and is connected with a plurality of fan rings;
the infrared filter control mechanism is as follows: controlling the motor;
the control motor is arranged on one side, facing the cup opening, of the first infrared filter, and the central axis of the control motor penetrates through the center of the first infrared filter and is connected to the center of the second infrared filter; the second infrared filter is driven to rotate to the first position when a first switching signal is received; or when a second switching signal is received, the second infrared filter sub-sheet is driven to rotate to the second position.
4. The apparatus of claim 3,
the device, still include: a photosensitive sensor;
the photosensitive sensor is electrically connected with the control motor and used for sending an opening signal to the control mechanism when the light intensity is higher than a preset threshold value and sending a closing signal to the infrared filter control mechanism when the light intensity is lower than the preset threshold value;
the control motor is started when receiving a starting signal to drive the second infrared filter to rotate to the first position; or when receiving the closing signal, the second infrared filter is driven to rotate to the second position.
5. The apparatus of claim 1,
the white light flashing light source is connected with a trigger device capable of generating a first supplementary lighting trigger signal, and receives the first supplementary lighting trigger signal sent by the trigger device to carry out flashing supplementary lighting; the trigger device includes: a camera or non-camera device;
the infrared filter control mechanism is connected with the camera and used for driving the adjustable infrared filter to partially cover the cup mouth of the reflecting cup according to a first switching signal received from the camera; or the adjustable infrared filter is driven to completely cover the cup mouth of the reflecting cup according to a second switching signal received from the camera.
6. The apparatus of claim 1,
the device, still include: the white light LED is arranged around the outer side of the cup opening of the reflecting cup;
the white light LED is used for carrying out LED stroboscopic light supplement when receiving a second light supplement trigger signal; or carrying out LED explosion flash light supplement when receiving a third light supplement trigger signal.
7. The device of claim 6, wherein the white light LED is connected to the camera and configured to perform LED stroboscopic fill-in light upon receiving a second fill-in light trigger signal sent by the camera; or carrying out LED flashing light supplement when a third light supplement trigger signal sent by the camera is received.
8. The apparatus of claim 6,
the device, still include: the front shell is used for installing the white light flashing light source, the reflecting cup, the adjustable infrared filter and the infrared filter control mechanism; and a rear housing for mounting a circuit board; the LED lamp comprises an annular LED lamp substrate surrounding the cup opening of the reflecting cup, a lens support corresponding to the annular LED lamp substrate in position, and an annular LED lamp pressing plate with a light through hole;
the front shell is of a funnel-shaped structure, a boss is arranged in a top opening of a funnel of the front shell, a reflecting cup mounting space is formed on the inner side of the boss in the funnel, and the outer side of the boss is used for fixedly mounting the LED lamp substrate;
the rear shell is connected with the bottom of the funnel;
the annular LED lamp substrate is arranged on the surface of the boss of the front shell;
the white light LED is arranged on the annular LED lamp substrate and faces towards the adjustable infrared filter;
the lens support is arranged on the annular LED lamp substrate;
the annular LED lamp pressing plate is arranged on the lens bracket;
the cup mouth of the reflecting cup is positioned on the annular LED lamp pressing plate;
white light transmission through holes are formed in the periphery of the adjustable infrared filter, and the shape and the position of each white light transmission through hole correspond to those of the lens support.
9. The apparatus of claim 1,
the inner curved surface of the light reflecting cup is obtained by calculation according to the range of a shooting scene and an aspheric equation, and the inner part of the light reflecting cup is a smooth curved surface or is provided with petal stripe type scaleforms.
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| CN201910146932.XA CN111624834B (en) | 2019-02-27 | 2019-02-27 | Light supplement device |
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| CN201910146932.XA CN111624834B (en) | 2019-02-27 | 2019-02-27 | Light supplement device |
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| CN113099091A (en) * | 2021-04-08 | 2021-07-09 | 天津天地伟业智能安全防范科技有限公司 | Bayonet camera shooting device and method, electronic equipment and storage medium |
| CN113485057B (en) * | 2021-06-04 | 2022-06-07 | 浙江大华技术股份有限公司 | Light filling lamp subassembly and light filling equipment |
| CN113612900B (en) * | 2021-06-16 | 2023-11-07 | 南昌交通学院 | High-precision image processing system based on DSP image coding processing |
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