CN112200113A - Self-adaptive light source device - Google Patents
Self-adaptive light source device Download PDFInfo
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- CN112200113A CN112200113A CN202011128956.1A CN202011128956A CN112200113A CN 112200113 A CN112200113 A CN 112200113A CN 202011128956 A CN202011128956 A CN 202011128956A CN 112200113 A CN112200113 A CN 112200113A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a self-adaptive light source device, which comprises a multilayer light source; each layer of light source comprises a plurality of light source modules, a light source substrate and a photoelectric control system; each light source module comprises a lamp bead plate; a lens cover plate is connected right in front of the lamp bead plate; a plurality of lamp bead lenses are arranged on the lens cover plate; an upper inclined connecting piece and a lower inclined connecting piece are respectively fixed at the upper end and the lower end of the lens cover plate; a heat conducting plate is fixed on the rear side surface of the lamp bead plate; the back side of the heat conducting plate is fixed with a plurality of radiating fins and temperature sensors; a radiating fan is arranged at the rear side of the radiating fin; a Z-shaped bracket is fixed on the rear side surface of the upper inclined connecting piece; the rear side surface of the Z-shaped bracket is fixedly connected with a lamp bead board driver; for each layer of light source, a plurality of light source modules are fixed on the side edge of the top of the light source substrate in a preset shape; and fixedly connecting the multilayer light sources. The invention can effectively solve the difficult problem of light supplement of iris imaging in complex scenes and meet the light supplement requirements of long distance, different directions, different heights and multiple targets.
Description
Technical Field
The invention relates to the technical field of self-adaptive light sources, in particular to a self-adaptive light source device.
Background
The iris identification technology is a safer biological feature identification technology, and the marketization application range is wider and wider along with the development of mobile payment and intelligent society. Although the iris has unique advantages compared with other biological characteristics such as human face and gait, the iris characteristics are tiny, so that high-performance hardware and a stable environment need to be matched in order to acquire a good iris.
The Asian iris is different from the European and American iris in nature, so special auxiliary light must be added to highlight the iris characteristics. Near infrared light of 850nm band is mainly used in current iris recognition. The shape, size, power, installation angle, and the like of the auxiliary light source are different according to the iris recognition apparatus and the differences of the iris recognition apparatus.
The contact type or close-distance iris recognition is easy to meet due to the close distance, small light loss, small light source power and uniform light field; and remote iris discernment has had higher requirement to the light source, and in the safe within range of iris discernment, generally be the reinforcing power, the slope installation prevents the reflection of light, but such remote light source can satisfy current discernment environmental requirement, but the light filling region is limited, and is unadjustable, can't adapt to the height, needs people's initiative cooperation, experiences badly.
With the development of the iris recognition technology, higher requirements are put forward on an auxiliary light source, but at present, no light source device which can adapt to complex iris recognition conditions exists, and application and popularization of remote iris (>2m) recognition, advancing iris recognition, multi-target iris recognition technology and the like are limited.
Therefore, there is a need to develop an adaptive light source device that can adapt to various complex conditions, and further promote the development of iris recognition technology.
Disclosure of Invention
The invention aims to provide an adaptive light source device aiming at the technical defects in the prior art.
To this end, the invention provides an adaptive light source device, comprising a multilayer light source;
each layer of light source comprises a plurality of light source modules, a light source substrate and a photoelectric control system;
each light source module comprises a lamp bead plate;
the front side surface of the lamp bead plate is provided with a plurality of near-infrared lamp beads;
a lens cover plate (for example, a stud and a screw are pressed and riveted through blind holes) is fixedly connected in front of the lamp bead plate at intervals;
a plurality of lamp bead lenses are respectively and correspondingly arranged on the lens cover plate at positions right in front of the plurality of near-infrared lamp beads on the lamp bead plate;
the upper end and the lower end of the lens cover plate are respectively and fixedly connected with an upper inclined connecting piece and a lower inclined connecting piece;
the light source modules in each layer of light source are provided with an upper inclined connecting piece and a lower inclined connecting piece, and the inclined angles are the same;
a heat conducting plate is fixedly arranged on the rear side surface of the lamp bead plate;
the back side of the heat conducting plate is fixedly provided with a plurality of radiating fins;
a heat radiation fan is arranged at the rear side of the heat radiation fins;
the rear side surface of the heat conducting plate is also fixedly provided with a temperature sensor;
the rear side surface of the inclined connecting piece is fixedly connected with a Z-shaped bracket;
the main body part of the Z-shaped bracket is positioned at the rear of the heat radiation fan;
the back side surface of the Z-shaped bracket is fixedly connected with a lamp bead board driver;
for each layer of light source, a plurality of light source modules are fixed on the side edge of the top of the same light source substrate in a preset shape;
the light source substrate in the multilayer light source is vertically provided with a plurality of substrate supporting frames in a penetrating way and is fixedly connected together through the substrate supporting frames;
the photoelectric control system is used for acquiring one or more target information in front of the light source module through the scene sensing equipment, and after calculating and analyzing the target information provided by the scene sensing equipment, determining the light source layer to be opened and the light source module in the specific direction to be opened in the light source layer and controlling the starting.
Preferably, the plurality of light source modules are distributed in a semicircular shape, and the bottom of the Z-shaped bracket in each light source module is fixedly connected to the front side edge of the top of the same light source substrate.
Preferably, the lamp bead lens is used for realizing light gathering;
the angles of the lamp bead lenses of each light source module in each layer of light source are the same.
Preferably, when the adaptive light source device comprises three layers of light sources, the angle of each lamp bead lens in the first layer of light source is 20 °, the angle of each lamp bead lens in the second layer of light source is 30 °, and the angle of each lamp bead lens in the third layer of light source is 45 °.
Preferably, when the adaptive light source device includes three layers of light sources, the inclined plane angle of the upper inclined connector and the lower inclined connector in the first layer of light sources is 8 °;
the inclined plane angle of the upper inclined connecting piece and the lower inclined connecting piece in the second layer of light source is 14 degrees;
the inclined plane angle of the upper inclined connecting piece and the lower inclined connecting piece in the third layer of light source is 20 degrees;
the inclination angle of the light source module included in each layer of light source is consistent with the inclination angle of the upper inclined connecting piece and the lower inclined connecting piece included in the layer of light source; the inclination angle of the light source module specifically comprises the inclination angle of the lens cover plate, the inclination angle of the lamp bead plate and the inclination angle of the heat conducting plate.
Preferably, an angle between any two adjacent light source modules on the same light source substrate is 15 °.
Preferably, the target information obtained by the scene awareness device specifically includes: a target D coordinate, a target distance, a target azimuth angle and a target height;
after the photoelectric control system calculates and analyzes the target information, the photoelectric control system determines the light source layer to be opened and the light source module of the specific direction to be opened in the light source layer, and the photoelectric control system specifically comprises the following control operations:
firstly, the photoelectric control system determines a light source layer to be opened according to a target distance in target information and a corresponding relation between a plurality of different pre-stored target distances and numbers of different light source layers;
then, the photoelectric control system determines the light source module of the specific azimuth to be opened in the light source layers to be opened according to the target azimuth in the target information and the corresponding relationship between the different light source module numbers and the different azimuths stored in advance in each light source layer, and then controls to start the light source module.
Preferably, the photoelectric control system is further configured to, after controlling and starting a specific azimuth light source module to be turned on in a light source layer to be turned on, acquire an iris image of a target by an iris camera, evaluate exposure of the iris image, and when overexposure or exposure is insufficient, send a current control signal to a lamp bead plate driver installed on the specific azimuth light source module to be turned on, and correspondingly control the lamp bead plate driver to reduce or increase the magnitude of the output current.
Preferably, the optoelectronic control system evaluates the exposure level of the iris image, and specifically includes the following evaluation steps:
firstly, a brightness aggregation method is used for positioning the face in a target image, and if the face in the target image cannot be positioned, the current target image is corrected to be dark and is underexposed; if the target image can be positioned, calculating the gray value in the preset region of interest in the target image, comparing the average gray value with a set standard value, and if the average gray value is larger than the set standard value, indicating overexposure.
Preferably, the photoelectric control system is further configured to, while controlling and starting a specific azimuth light source module to be opened in a light source layer to be opened, obtain the temperature of the surface of a heat conducting plate on the light source module through a temperature sensor on the light source module, and control and start the cooling fan installed on the heat conducting plate when the temperature of the surface of the heat conducting plate is greater than a preset threshold;
the photoelectric control system is also used for controlling the cooling fan to increase the working current and further increase the cooling power through a motor controller on the cooling fan if the temperature value measured by a temperature sensor on the light source module does not decrease after the cooling fan is controlled to be started;
each temperature sensor is connected with the photoelectric control system and used for detecting the temperature of the surface of the heat conducting plate in the light source module installed on the temperature sensor and then sending the temperature to the photoelectric control system.
Compared with the prior art, the technical scheme provided by the invention has the advantages that the self-adaptive light source device is scientific in design, the problem of light supplement in iris imaging in a complex scene can be effectively solved, the light supplement requirements of long distance, different directions, different heights and multiple targets are met, the light supplement capability of iris imaging, acquisition or identification products or systems is enhanced, and the interaction experience is improved.
Drawings
Fig. 1 is a schematic structural diagram of any light source module in an adaptive light source device provided by the present invention;
FIG. 2a is a schematic diagram of the optical field distribution when the lens angle of the first layer light source is 20 degrees according to the adaptive light source apparatus provided in the present invention;
FIG. 2b is a schematic diagram of the optical field distribution when the lens angle of the second layer of light source is 30 degrees according to the adaptive light source apparatus provided in the present invention;
FIG. 2c is a schematic diagram of the optical field distribution when the lens angle of the third layer of light source is 45 degrees according to the adaptive light source apparatus provided in the present invention;
FIG. 3 is a schematic diagram of an adaptive light source device according to the present invention for accommodating different heights;
FIG. 4 is an overall schematic view of an adaptive light source device provided by the present invention;
FIG. 5 is a schematic control flow chart of an adaptive light source apparatus according to the present invention;
fig. 6 is a schematic diagram of an adaptive light source device according to the present invention, performing omnidirectional expansion and group light supplement;
FIG. 7 is a schematic diagram illustrating an application of an embodiment of an adaptive light source device apparatus according to the present invention;
FIG. 8 is a schematic diagram illustrating target information of an adaptive light source apparatus according to the present invention;
FIG. 9 is a schematic illustration of positive and negative angles of a target azimuth;
in the figure, 1 is a light source module, 2 is a light source substrate, 3 is a photoelectric control system, and 4 is a substrate support frame;
11 is a lamp bead plate, 12 is a lamp bead lens, 13 is a lens cover plate, 14 is an upper inclined connecting piece, and 15 is a lower inclined connecting piece;
161 is a heat conducting plate, 162 is a heat sink, 163 is a heat dissipating fan;
and 17 is a temperature sensor, 18 is a Z-shaped bracket, and 19 is a lamp bead board driver.
Detailed Description
In order to make the technical means for realizing the invention easier to understand, the following detailed description of the present application is made in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In addition, it should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the term "mounted" and the like should be interpreted broadly, and may be, for example, either fixedly mounted or detachably mounted.
The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.
Referring to fig. 1 to 9, the present invention provides an adaptive light source device including a multi-layered light source;
each layer of light source comprises a plurality of light source modules 1, a light source substrate 2 and a photoelectric control system 3;
each light source module 1 comprises a lamp bead plate 11;
a plurality of near-infrared lamp beads are arranged on the front side surface of the lamp bead plate 11;
a lens cover plate 13 (for example, a stud and a screw are pressed and riveted through blind holes) is fixedly connected right in front of the lamp bead plate 11 at intervals;
a plurality of lamp bead lenses 12 are respectively and correspondingly arranged on the lens cover plate 13 at positions right in front of the plurality of near-infrared lamp beads on the lamp bead plate 11;
the upper end and the lower end of the lens cover plate 13 are respectively and fixedly connected with an upper inclined connecting piece 14 and a lower inclined connecting piece 15;
the light source modules 1 in each layer of light source are provided with an upper inclined connector 14 and a lower inclined connector 15, and the inclined angles are the same (namely the included angle between the inclined angles and the horizontal plane);
a heat conducting plate 161 (for example, through heat conducting silica gel) is fixedly arranged on the rear side surface of the lamp bead plate 11;
a plurality of heat radiating fins 162 are fixedly provided on the rear side surface of the heat conducting plate 161;
a heat radiation fan 163 is mounted on the rear side of the plurality of heat radiation fins 162;
a temperature sensor 17 (for example, through a heat conductive silicone) is also fixedly disposed on the rear side surface of the heat conductive plate 161;
the rear side surface of the upper inclined connecting piece 14 is fixedly connected with a Z-shaped bracket 18;
a main body portion of the Z bracket 18 located behind the heat dissipating fan 163;
a lamp bead board driver 19 (for example, through a copper stud) is fixedly connected to the rear side surface of the Z-shaped bracket 18;
for each layer of light source, a plurality of light source modules 1 are fixed on the side edge of the top of the same light source substrate 2 in a preset shape (specifically, a semicircular shape, an arc shape or a circular shape); for example, it may be: the plurality of light source modules 1 are distributed in a semicircular shape, and the bottom of the Z-shaped bracket 18 in each light source module 1 is fixedly connected to the front side edge of the top of the same light source substrate 2.
The light source substrate 2 in the multilayer light source is vertically provided with a plurality of substrate support frames 4 (specifically, three substrate support frames 4) in a penetrating manner, and the substrate support frames 4 are fixedly connected together.
It should be noted that the substrate support frame 4 is a main connecting member between adjacent layers of light sources, each layer is three, the upper and lower ends are provided with positioning threaded holes, and the positioning installation is performed through the support positioning grooves on the light source substrate 2 during connection.
In the present invention, in a specific implementation, the positioning stepped hole for accommodating the lamp bead lens 12 on the lens cover plate 13 is concentric with the lamp bead corresponding to the lamp bead lens 12.
In the invention, the lamp bead plate 11 is an aluminum substrate, the power is 40W, the power is 850nm near infrared, 8 5W lamp beads are provided, and a four-string two-parallel mode is used, so that the driver is prevented from being burnt out due to overhigh current, and the voltage is prevented from being insufficient.
It should be noted that, the device of the invention adopts a modular design, can be freely combined, and the quantity, power and the like of each lamp bead contained in each light source module can be specially designed and independently controlled according to the situation; every layer of light source is independent each other, can be according to the demand to every layer independent design, and multilayer stack cooperation is used.
In the present invention, the heat conducting plate 161 is a copper plate and is fixed on the lamp bead plate 11 through heat conducting silica gel. Because lamp pearl board 11 upper portion does not have fin and initiative radiator fan, along with operating time's extension, the heat can constantly accumulate, finally leads to the lamp pearl to burn out, increases heat-conducting plate 161, can lead to the lower part with upper portion heat rapidly, makes lamp pearl board 11 reach thermal balance basically, guarantees safe work, increase of service life.
In the present invention, in a specific implementation, the temperature sensor 17 is a metal patch type temperature sensor, and is fixed on the heat conducting plate 161 by using a high temperature glue (specifically, a heat conducting silica gel) for monitoring the temperature change of the light source module in real time (specifically, monitoring the temperature change of the heat conducting plate 161 in contact).
In the specific implementation, the temperature sensor 17 may be uploaded to an external data processing platform and an upper computer through a controller analog input port in the photoelectric control system.
In the present invention, in particular, the heat sink 162 and the heat dissipation fan 163 are to further enhance the heat dissipation capability of the light source module 1; the heat sink 162 and the heat dissipation fan 163 are fixed by using heat conductive silicone as heat conductive heat dissipation portions, and the heat dissipation fan 163 is normally closed and is activated accordingly according to the operation of the temperature sensor 17.
In the invention, in particular, the lamp bead lens 12 is mainly used for realizing light gathering; the lamp bead lens 12 has various angles, and the angles of the lamp bead lenses 12 of each light source module 1 in each layer of light source are the same;
when the adaptive light source device comprises three layers of light sources, the angle of each lamp bead lens 12 in the first layer of light source is 20 degrees, the angle of each lamp bead lens 12 in the second layer of light source is 30 degrees, and the angle of each lamp bead lens 12 in the third layer of light source is 45 degrees. The smaller the angle of the lens is, the more the light is condensed, the longer the irradiation distance can be; see in particular fig. 2a to 2 c.
The angle of the lens of the lamp bead refers to the size of the light-emitting range of the lamp bead after being turned on, that is, the beam angle.
In the invention, in concrete implementation, the lens cover plate 13 is used for positioning and fixing the lamp bead lens 12, the lens cover plate 13 is made of aluminum alloy, is connected with the lamp bead plate 11 through blind hole riveting studs and screws and is used for fixing the lamp bead lens 12, and a positioning stepped hole for fixing the lamp bead lens 12 on the lens cover plate 13 is concentric with the lamp bead.
In the present invention, in the concrete implementation, the upper inclined connector 14 and the lower inclined connector 15 are key parts of the device of the present invention, and are adapted to the height through different inclined angles (i.e. included angles with the horizontal plane), and the inclined angles of the upper inclined connector 14 and the lower inclined connector 15 in each layer of light source are the same.
In a specific implementation, when the adaptive light source device of the present invention includes three layers of light sources, the inclined plane angles of the upper inclined connector 14 and the lower inclined connector 15 in the first layer of light sources are 8 °;
the inclined plane angles of the upper inclined connector 14 and the lower inclined connector 15 in the second layer of light sources are 14 degrees;
the inclined plane angle of the upper inclined connector 14 and the lower inclined connector 15 in the third layer of light source is 20 degrees;
the inclination angle of the light source module 1 included in each layer of light source (specifically, the inclination angle of the lens cover plate 13, the inclination angle of the bead plate 11, and the inclination angle of the heat conducting plate 161, which are the same) is the same as the inclination angle of the upper inclined connecting piece 14 and the lower inclined connecting piece 15 included in the layer of light source.
It should be noted that, for each light source module, the upper inclined connector 14 and the lower inclined connector 15 are used in pairs, and the angles are the same; the slope angles of the upper slope connecting piece 14 and the lower slope connecting piece 15 are determined according to the installation height, the angle of the lamp bead lens and the range of the target height, and various angles can be provided when the lamp beads are in a multilayer state.
It should be noted that, for the invention, the power, angle, etc. of the light source module 1 are adjustable, and are distributed in a semicircular shape, and can also be in an arc shape or a circular shape according to the requirement, so that the invention can provide an ideal near-infrared illumination condition of one-way, any large view field or all-around for iris imaging, and meet the illumination requirement of complex iris imaging;
in the invention, in concrete implementation, the light source module 1 is fixed on the light source substrate 2 by the Z-shaped support 18 mainly through screws, and the lamp bead board driver 19 is fixed on the Z-shaped support 18 through a copper stud.
In the invention, in concrete implementation, the lamp bead board driver 19 is a constant current driver, the voltage is 8.5V, and the current is 2.5A, the output end of the lamp bead board driver 19 is connected with the lamp bead board 11, and the input end of the lamp bead board driver 19 is connected with the output end of the photoelectric control system 3.
In the present invention, in a specific implementation, the light source substrate 2 is another key component of the apparatus of the present invention, the light source module 1 included in each layer of light source is fixed on the front side edge of the light source substrate 2 by screws, and the photoelectric control system 3 is fixed on the light source substrate 2.
It should be noted that, for the specific implementation of the present invention, the diameter of the circumscribed circle of the light source substrate 2 is 0.5m, upper interference must be avoided when the light source modules are installed, the control voltage is 24V, the included angle between the two light source modules is 15 °, and the semicircular viewing field area can be covered maximally. When the light source module 1 is installed, the light source module 1 is fixed on the light source substrate 2, and the layers are connected through the substrate support frame 4. If the inclination angle of a certain light source layer needs to be changed, only the inclined connecting piece needs to be replaced.
In the present invention, in a specific implementation, an included angle between any two adjacent light source modules 1 on the same light source substrate 2 is 15 °.
In the present invention, in a specific implementation, the photoelectric control system 3 is configured to acquire one or more pieces of target information located in front of the light source module 1 through a scene sensing device, and after performing calculation and analysis on the target information provided by the scene sensing device, determine a light source layer to be turned on and a light source module in a specific direction to be turned on in the light source layer and control starting (i.e., turning on);
the photoelectric control system 3 is further configured to, after controlling and starting a specific azimuth light source module to be turned on in a light source layer to be turned on, acquire an iris image of a target through an iris camera, evaluate exposure of the iris image, and when overexposure or exposure is insufficient, send a current control signal to the bead plate driver 19, and correspondingly control the bead plate driver 19 mounted on the specific azimuth light source module to be turned on to reduce or increase the magnitude of output current; therefore, the power of the light source module can be automatically adjusted, good image illumination conditions are formed, and the image can reach an ideal state.
It should be noted that, for the technical solution of the present invention, the main point is the light source structure, and the scene sensing device has no explicit requirement, and the existing device is basically adopted, but the scene sensing device of the present invention uses a second generation ZED binocular 3D device produced by stereoslabs company in the test, but is not limited to this, and according to the requirements of the detection distance and the precision, 3D products of companies such as Kinect, Intell, and tuyan may also be used, and may be binocular, or may be structured light or TOF.
In the present invention, the role of the scene awareness apparatus is: and 3D coordinate information of the target is obtained from the point cloud (generally, the central point of a human face is taken as the 3D coordinate of the target), and then the target distance, the target azimuth angle and the target height are calculated, so that the photoelectric control system 3 opens the corresponding light source according to the result calculated by the scene sensing equipment. It should be noted that data obtained by a 3D device (i.e., a scene sensing device) is point cloud data, and many 3D points are point clouds.
For the specific implementation of the present invention, the target information obtained by the scene sensing device specifically includes: target 3D coordinates, target distance, target azimuth, and target height (or height of a person).
And parameters such as the target distance, the target azimuth angle, the target height and the like can be calculated according to the coordinates. Referring to fig. 8, specifically: assuming the 3D coordinates of object M as (x, y, z), the object distance (i.e., the current object-to-device distance)
The target azimuth α is arctan (x/z), and given that the installation height H of the sensing device is known, the target height (i.e. the height of a human body) H is H-y (the y-axis coordinate of the 3D device is generally positive downwards, otherwise y should be added).
Referring to fig. 8, fig. 8 is a schematic diagram illustrating target information of an adaptive light source apparatus according to the present invention; it should be noted that, according to the 3D measurement principle of the scene sensing device, the present invention creates an O-XYZ coordinate system (i.e. a scene sensing device coordinate system), and in the embodiment, specifically uses a binocular ZED as the scene sensing device, for the coordinate system, the coordinate origin O is at the left eye center position of the ZED device, the Z axis is a depth axis, and the direction perpendicular to the front surface of the ZED device is the positive axis direction (due to the existence of a dark area, the measurement distance is >0.3 m); the X axis is an azimuth axis, and the left eye pointing to the right eye is taken as the axial positive direction along the connecting line position of the left eye central point and the right eye central point of the device; the Y axis is a height axis, passes through an origin O, is vertical to the XOZ plane, and takes the vertical direction as the positive axial direction. The coordinate of the target M is a 3D point coordinate corresponding to the face central point, and the target distance S is the length of a connecting line OM between the origin O and the central point of the target M; the equipment installation height h is the distance from the XOZ plane to the horizontal plane; the target azimuth angle alpha is an included angle ZOM 'between a projection point M' of the target M on the XOZ plane and the YOZ plane; and | β is a pitch angle of the target M and is an included angle between a connecting line OM of the origin O and the target M and an XOZ plane, namely ^ MOM'.
In the present invention, in a specific implementation, after calculating and analyzing the target information, the photoelectric control system 3 determines the light source layer to be turned on and the light source module in the specific direction to be turned on in the light source layer, and specifically includes the following control operations:
firstly, the photoelectric control system 3 determines the light source layer to be opened according to the target distance in the target information and the corresponding relationship between a plurality of different pre-stored target distances S and the numbers of different light source layers, namely determines which layer of light source is opened (three layers of light sources correspondingly cover three distances within the range of 0-5 m);
then, the photoelectric control system 3 determines the light source module of a specific azimuth to be turned on in the light source layers to be turned on according to the target azimuth in the target information and the corresponding relationship between the different light source module numbers and the different azimuth angles α stored in advance in each light source layer, and then controls to start the light source module, that is, determines which light source module of the specific azimuth to turn on the layer according to the target azimuth angle (each light source layer includes 12 light source modules, one light source module corresponds to an azimuth angle of 15 degrees, and the right front is 0 degree).
The above specific operation can be realized by a light source control subsystem included in a computer server in the optoelectronic control system 3.
In addition, in a specific implementation, the photoelectric control system 3 may further determine, according to a target height in the target information, whether the target height is within a coverage height of the light source module that needs to be currently turned on (i.e., a light field coverage height of the light source module), and if not, if the target height is beyond a coverage boundary of the light source module, trigger to turn on the light source module in the same direction in the previous light source layer corresponding to the light source layer that needs to be currently turned on. That is to say, the photoelectric control system 3 further determines whether the light field of the light source module that needs to be turned on currently covers a human face (which can be basically satisfied) according to the height, and if the light field exceeds the boundary of the light source, the light source module in the same direction as the previous layer of the current light source layer needs to be turned on. These can be set within the program.
In the invention, the photoelectric control system 3 comprises a relay control circuit board (each layer of light source corresponds to one relay control circuit board), a lamp bead board driver, an RS232 communication line, an iris camera and a computer server;
the relay control circuit board is connected (powered) with the lamp bead board driver through a power line and is connected with the computer server through an RS232 communication line;
the lamp bead board driver is also connected with the computer server through an RS232 communication line;
the computer server sends an instruction through the USB serial port to enable a corresponding relay in the relay control circuit board to be turned on, so that power is supplied to the lamp bead board driver;
it should be noted that the relay control circuit board is a conventional circuit board known in the art, and is not described herein again.
In the specific implementation, the computer server is specifically configured to trigger the iris camera (specifically, the iris camera may be installed directly above the light source layer, as shown in fig. 7) to collect a frame of target image, determine the brightness of the current target image according to the gray value of the target image, and send an instruction to the lamp bead panel driver through the USB serial port if the target image is overexposed or underexposed (the determination criterion is determined according to requirements), so that the output current of the lamp bead panel driver is correspondingly adjusted, that is, the output current is reduced when the target image is overexposed, and the output current is increased when the target image is underexposed.
It should be noted that, with the present invention, an iris camera is used to acquire an iris image of a subject.
In a specific implementation of the present invention, the optoelectronic control system 3 evaluates the exposure level of the iris image, and specifically includes the following evaluation steps:
firstly, a brightness aggregation method (the method is a known method) is used for positioning the human face in the target image, and if the human face in the target image cannot be positioned, the current target image is corrected to be dark and is underexposed; if the target image can be positioned, calculating the gray value in a preset ROI target region (namely the region of interest) in the target image, comparing the gray value average value with a set standard value (which can be set to 125 and can be adjusted according to actual conditions), and if the gray value average value is larger than the set standard value, indicating overexposure.
Note that, roi, (region of interest), region of interest. In machine vision and image processing, a region to be processed is outlined from a processed image in the form of a box, a circle, an ellipse, an irregular polygon, or the like, and is called a region of interest.
In a specific implementation, the photoelectric control system 3 is further configured to, while controlling and starting a specific azimuth light source module to be opened in a light source layer to be opened, obtain, through the temperature sensor 17 on the light source module, a temperature of the surface of the heat conducting plate 161 on the light source module, and when the temperature of the surface of the heat conducting plate 161 is greater than a preset threshold, control and start the cooling fan 163 installed on the heat conducting plate 161; the control operations may be implemented by a heat dissipation control subsystem included in a computer server in the optoelectronic control system, where the heat dissipation control subsystem is connected to the light source control subsystem.
Each temperature sensor 17 is connected to the photoelectric control system 3, detects the temperature of the surface of the heat conducting plate 161 in the light source module 1 mounted thereon, and then sends the detected temperature to the photoelectric control system 3.
Therefore, the heat dissipation intensity and the heat dissipation time of the light source module can be automatically regulated, the heat balance is realized, and the long-time working requirement is met.
It should be noted that, the photoelectric control system 3 includes a computer server (including a light source control subsystem and a heat dissipation control subsystem), and a synchronous thread for temperature detection is provided in software designed on the computer server, and the photoelectric control system 3 can read the temperature value of the corresponding light source module from the temperature sensor 17 in real time through an analog signal acquisition card (the analog input port has been corresponding to the light source module ID); a power line of a motor controller of the cooling fan 163 is connected with a 24V stabilized voltage power supply, and a control end of the cooling fan is connected with a USB port of a computer server through an RS232 communication line; when the temperature value is greater than the threshold value, the upper computer or the program sends an instruction to the motor controller of the cooling fan 163, and the motor controller of the cooling fan 163 supplies power to the fan according to the instruction, that is, the fan is turned on (for realizing energy saving, the wind speed is 1 level when the fan is started, the wind speed is totally 64 levels, and the higher the level is, the larger the wind speed is); when the cooling fan is detected to be opened and the temperature is not continuously increased, the computer server serving as the upper computer sends an instruction to increase the output current of the motor controller of the cooling fan 163, namely, the wind speed, so that self-adaptive cooling is realized; when the temperature is lower than the threshold, the motor controller controlling the heat dissipation fan 163 cuts off the power supply, and the heat dissipation stops.
It should be noted that, for the present invention, the photoelectric control system 3 firstly calculates the target distance, target azimuth and target height information of the provided target through the scene sensing device according to the target information (i.e. sensing result) sensed by the scene sensing device, and then the light source control subsystem in the photoelectric control system 3 can control the action and output current of the lamp bead board driver 19 through the relay control circuit board based on the analysis result; when the heat dissipation control subsystem monitors that the temperature of the light source module is greater than a preset temperature threshold, the heat dissipation fan is controlled to be started and the current is controlled, further the heat dissipation intensity is controlled, active heat dissipation is stopped (namely the heat dissipation fan 163 is controlled to be turned off) until the temperature is less than the preset temperature threshold, and if the temperature is still raised during heat dissipation, the current is continuously increased according to the preset value;
in a specific implementation, the optoelectronic control system 3 (specifically, the heat dissipation control subsystem therein) is further configured to, after the heat dissipation fan 163 is controlled and started, control the heat dissipation fan 163 to increase the working current and further increase the heat dissipation power through a motor controller (e.g., a dc speed regulator) on the heat dissipation fan 163 if the temperature value measured by the temperature sensor 17 on the light source module in the specific direction does not decrease.
In the invention, a relay control circuit board included in a photoelectric control system is a control board with 12-port input and 24-port output, wherein ports COM 1-COM 12 are sequentially connected with an input end of a lamp bead board driver, ports COM 13-COM 24 are sequentially connected with an adjusting end of a direct current speed regulator (namely a motor controller) on a cooling fan, an input end of an analog quantity of I0.0-I1.0 is connected with a temperature sensor, IDs of three relay control circuit boards (each light source layer corresponds to one relay control circuit board) included in the photoelectric control system 3 are ID 0-ID 2, and the three relay control circuit boards are connected with an external data processing platform (such as an industrial personal computer or a server) through RS232 communication lines.
It should be noted that, for the present invention, according to the light field distribution condition of the adaptive device, a certain dark area and a certain bright area may appear during use, the dark area is a lighting area of a single module at a certain distance from a certain position, the superimposed lighting area of two adjacent modules at the same position is a bright area, and the brightness of the area (i.e., the bright area) is enhanced by the superimposition and is obviously higher than that of the dark area. The larger the angle of the lens of the lamp bead is, the larger the reinforcing area is. See in particular fig. 2a to 2 c.
As shown in FIG. 4, the adaptive light source device of the present invention comprises three layers of light sources, wherein each layer of light source can cover a height range of 0.8-2.2 m basically, the first layer of light source mainly corresponds to 0.5-2.0 m, the second layer of light source mainly corresponds to 2.0-3.5 m, and the third layer of light source mainly corresponds to 3.5-5.0 m. Under the condition of meeting the eye safety condition, the control strategy of the light source is changed during actual use. The light source modules are numbered as id 0-0-id 0-11, id 1-0-id 1-11 and id 2-0-id 2-11.
It should be noted that, as shown in fig. 3, the height range of the target covered by each layer of light source is mainly related to the inclination angle of the light source module, the installation height of the light source, and the light emitting angle of the used lamp bead lens. As long as the installation is too high or too low.
Wherein, for the uppermost third layer light source, the inclination is 20 degrees, the installation height is 1.25m, the light-emitting angle is 45 degrees, and the light-emitting surface at 1m is high in the center
Covering1.2～2.0m；
For the second layer light source, the inclination is 14 °, the installation height is 1.05m, the light emitting angle is 30 °, and the center height and radius of the light emitting surface at 3m are as follows:
for the first layer light source, the inclination is 8 degrees, the installation height is 0.95m, the light-emitting angle is 20 degrees, and the center height and the radius of the light-emitting surface at 4m
Covering 0.807-2.217 m;
in the above, only the coverage area of the central light spot of each layer of light source is theoretically provided, the light can be diffused in practice, and the lamp beads on the module are arranged according to a rectangle, which all affect the coverage area of the light source. In the specific implementation, the heights of the three layers of light sources can be determined according to the size and the inclination angle of the light source module; the overall installation height is required to cover the height (1.1-2.0 m) of a normal person.
In order to more clearly understand the technical solution of the present invention, the following describes the working principle of the present invention.
Referring to fig. 5, when the apparatus of the present invention is started, in the first step, a scene sensing device and a control port are initialized, and then a 3D data flow and a heat dissipation control subsystem thread are started. The scene sensing equipment continuously acquires scene information, when a target M is detected to exist in the scene, the scene sensing equipment acquires a face 3D coordinate of the target from the point cloud according to a 2D face central point pixel coordinate, the face 3D coordinate of the target is set to be (x, y, z), and a target distance S is calculated by referring to a target information schematic diagram shown in FIG. 8
A target azimuth angle α (α ═ arc tan (x/z), 0 ° right ahead, positive angle to the left of the front of the scene sensing device, negative angle to the right of the front, see fig. 9), and a target height H (i.e., target height, H ═ H-y, H is the installation height of the scene sensing device);
as described above, for the present invention, the target information obtained by the scene sensing device specifically includes: target 3D coordinates, target distance, target azimuth, and target height (or height of a person).
In the concrete implementation, the human face detection uses a cascade classifier based on Haar features, and the existing optimized human face detection algorithm can be adopted. After the face is positioned, the three-dimensional coordinates of the center point of the face are mainly obtained, and then the distance, the azimuth angle and even the pitch angle are calculated according to the coordinates.
It should be noted that data obtained by a 3D device (i.e., a scene sensing device) is point cloud data, and many 3D points are point clouds.
Secondly, the photoelectric control system determines a light source layer to be opened and a light source module of a specific azimuth to be opened in the light source layer according to the target distance S, the corresponding relationship between a plurality of different pre-stored target distances S and the numbers of different light source layers and the corresponding relationship between the numbers of different light source modules in each light source layer and a plurality of different azimuth angles alpha, and then controls the opening;
in the second step, specifically, according to the target distance S, the opened layer IDx (S ∈ [0.5, 2.0) is determined by looking up the data table, where x is 0; s ∈ [2.0, 3.5), x ═ 1; s ∈ [3.5, 5.0], x ═ 2), and then the light source module idx-y of the layer is determined by α. In the data table, the corresponding relationship between a plurality of different targets S and the numbers of different light source layers is stored in advance, and the corresponding relationship between the numbers of different light source modules in each light source layer and a plurality of different azimuth angles α is stored in advance.
In particular, a left light source module is taken as an example:
when alpha belongs to (-7.5 degrees, 7.5 degrees), the light source module id is idx-5 and idx-6;
when alpha belongs to [7.5 degrees, 22.5 degrees ], the light source module id is idx-4 and idx-5;
when alpha belongs to [22.5 degrees, 37.5 degrees ], the light source module id is idx-3 and idx-4;
when alpha belongs to [37.5 degrees, 52.5 degrees ], the light source module id is idx-2 and idx-3;
when alpha belongs to [52.5 degrees, 67.5 degrees ], the light source module id is idx-1 and idx-2;
when alpha belongs to [67.5 degrees, 82.5 degrees ], the light source module id is idx-0 and idx-1;
when alpha belongs to [82.5 degrees, 90.0 degrees ], the id of the light source module is idx-0;
if α < 0, it can be determined that the corresponding right light source module needs to be turned on (with the straight front boundary as the axis, each layer is divided or becomes a left light source module and a right light source module, 6 modules per side).
In the above operation, two light source modules are turned on simultaneously because adjacent light source modules may form regional intensity enhancement, which helps to improve iris quality. Therefore, no matter the target is at any position in the scene, the light can be well supplemented by controlling the invention. And finally, the corresponding light source module is controlled to be turned on only by the photoelectric control system 3, namely, the upper computer can send the simulation Modbus protocol instruction to the photoelectric control system 3 through the RS232 in advance.
In the second step, the photoelectric control system also judges whether the target is in a preset infrared light field range of the light source module to be turned on (mainly for preventing extreme conditions), if not, the target is out of the light field range, and at this time, the photoelectric control system sends out voice interaction (for example, sends out a section of prompt voice) to guide the target to properly adjust the height (for example, squat for a distance);
and thirdly, after the light source is adjusted, the photoelectric control system starts to acquire an iris image through the iris camera, the exposure degree of the iris image is evaluated while processing, if overexposure or underexposure occurs, the photoelectric control system 3 correspondingly sends a control signal to the lamp bead plate driver 19 on the light source module 1 determined to be turned on in the second step, and the output current of the lamp bead plate driver 19 is reduced or increased, so that the image quality reaches an ideal state.
In addition, for the specific implementation of the invention, when the device of the invention is started, the heat dissipation control routine is synchronously operated, and the heat dissipation of each light source module is independently controlled. The specific operation is as follows:
firstly, acquiring a temperature value of a currently started light source module (namely the temperature value of a heat conducting plate in the light source module) from a temperature sensor through a heat dissipation control subsystem in a photoelectric control system;
then, the heat dissipation control subsystem in the photoelectric control system compares the current temperature value with a preset temperature threshold value, if the current temperature value is greater than the preset temperature threshold value, the heat dissipation fan corresponding to the light source module is started, a new temperature value is obtained from the temperature sensor again after waiting for a preset time (for example, 5s), and the relationship between the new temperature value and the previous temperature point is judged; if the current temperature value is less than (i.e. after 5s), the temperature of the currently started light source module is reduced, the relation between the new temperature value and the threshold value is continuously judged, if the current temperature value is greater than the preset threshold value, heat dissipation is continuously carried out according to the current power, and the operation is repeated after every preset time (for example, 5 s);
if the temperature is smaller than the preset temperature threshold value, the temperature is reduced to a normal safety range, and the heat dissipation control subsystem controls the heat dissipation fan to be turned off. If the temperature value obtained after the preset time (for example, 5s) is not reduced after the cooling fan is started, it indicates that the currently started light source module generates heat seriously, and the cooling control subsystem increases the power of the cooling fan and accelerates cooling by controlling a direct current speed regulator (namely, a motor controller) of the cooling fan.
For the specific implementation of the invention, when a plurality of targets exist in a scene, the plurality of targets can be sequentially subjected to light supplement imaging according to the method, and the light supplement of the corresponding azimuth light source module can be simultaneously turned on, so that the requirements of multi-target iris imaging and light supplement identification are met.
It should be noted that, for the iris recognition in the moving process, the on-off of the light source module (different layers and different directions) can be continuously adjusted according to the real-time information feedback of the scene sensing device, so as to realize tracking adaptation and light supplement, and not only can meet the requirements of light supplement for recognition in different directions in the moving process, but also can meet the requirements of light supplement for iris recognition in the complex moving process.
Currently, the laser safety standard IEC60825-1 specifies the Maximum irradiance (MPE) that an eye region (including the retina) can withstand, and the calculation formula of the MPE according to the standard is as follows:
MPE＝18×t0.75×C4×C6(J/m2)；
light intensity per unit time, i.e. light power EMPEComprises the following steps:
EMPE＝MPE/t＝1.8×t-0.25×C4×C6(mw/cm2)；
in the above formula, t is the irradiation time, C4Is a wavelength correction factor of the optical fiber, C6For the radiation angle correction factor, there is a relationship with the limit subtended angle α (the viewing angle that the apparent light source is to assume for the measurement point), defined as:
in particular, the light source module of the invention uses 850nm near-infrared lamp beads, namely C4＝100.002(λ-700)＝100.002×(850-700)0.2. The iris imaging and recognition time is 3s, and the safe maximum optical power range is 2.7mw/cm2，6.7mw/cm2]The limiting subtended angle is [1.5mrad, 11.2mrad ]]The maximum optical power is linear with the limiting subtended angle. The optical power of the light source module in the device of the invention at 0.5m is about 0.245mw/cm through the test of the optical power meter equipment2The optical power at a long distance is less than 90uw/cm2(0.09mw/cm2) Far within the safe range, the eye will not be damaged.
Based on the technical scheme, the device provided by the invention has the advantages that the whole device adopts a modular design, the reconfigurability is strong, the disassembly, the installation, the maintenance and the expansion are convenient, the manufacturing cost is low, the controllability is strong, the iris imaging and identifying requirements under a complex environment can be met, and the application of the iris identifying technology under a complex scene can be promoted.
It should be noted that, for the invention, the device adopts a modular design, can be freely combined, and the quantity, power and the like of each lamp bead contained in the module can be specially designed and independently controlled according to the situation; each layer is independent, can be according to the demand to each layer independent design, and multilayer stack cooperation is used.
The device can meet the light supplement requirement of iris imaging on the near-infrared device under complex environments (different distances, different directions, different heights and multiple targets), can automatically adjust the direction and the intensity of a light source, can realize simultaneous light supplement of multiple targets, and has the advantages of good heat radiation performance, modular design, strong reconfigurability, convenience in installation and maintenance and low manufacturing cost.
Compared with the prior art, the self-adaptive light source device provided by the invention has the following beneficial effects:
1. the device of the invention has large coverage field of view. The height is fully covered, the azimuth angle can reach +/-90 degrees, and +/-180 degrees of omnidirectional view field light supplement can be realized after the extension and combination.
2. And 3, self-adaptation of the height. The device can automatically adjust the light source to adapt to targets with different heights or targets with relative height change in movement according to the feedback of the scene sensing equipment.
3. The direction is self-adaptive. The device can automatically control the light source of the corresponding direction according to the feedback of the scene sensing equipment.
4. The hardware of the apparatus of the present invention is reconfigurable. The modular design can be freely adjusted according to needs, the reconfigurability is strong, and the installation, the maintenance and the expansion are convenient.
Based on the technical scheme, the iris identification light supplement device can solve the problem of iris identification light supplement in complex environments such as long distance, multiple targets and multiple directions, is automatically adaptive to the height, automatically adjusts the angle and the light intensity, has a compact structure, is reconfigurable in modular design, is convenient to expand and maintain, has strong heat dissipation capacity and long service life, improves the interactive experience, and expands the application scene and range of the iris identification technology.
In summary, compared with the prior art, the self-adaptive light source device provided by the invention has a scientific design, can effectively solve the problem of light supplement in iris imaging in a complex scene, meets the light supplement requirements of long distance, different directions, different heights and multiple targets, enhances the light supplement capability of iris imaging, acquisition or identification products or systems, and improves interactive experience.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. An adaptive light source device, characterized by comprising a multilayer light source;
each layer of light source comprises a plurality of light source modules (1), a light source substrate (2) and a photoelectric control system (3);
each light source module (1) comprises a lamp bead plate (11);
the front side surface of the lamp bead plate (11) is provided with a plurality of near-infrared lamp beads;
a lens cover plate (13) is fixedly connected right in front of the lamp bead plate (11) at intervals;
a plurality of lamp bead lenses (12) are respectively and correspondingly arranged on the lens cover plate (13) at positions right in front of the plurality of near-infrared lamp beads on the lamp bead plate (11);
the upper end and the lower end of the lens cover plate (13) are respectively and fixedly connected with an upper inclined connecting piece (14) and a lower inclined connecting piece (15);
the light source modules (1) in each layer of light source are provided with an upper inclined connector (14) and a lower inclined connector (15), and the inclined angles are the same;
a heat conducting plate (161) is fixedly arranged on the rear side surface of the lamp bead plate (11);
a plurality of radiating fins (162) are fixedly arranged on the rear side surface of the heat conducting plate (161);
a heat radiation fan (163) is installed at the rear side of the plurality of heat radiation fins (162);
a temperature sensor (17) is also fixedly arranged on the rear side surface of the heat conducting plate (161);
the rear side surface of the upper inclined connecting piece (14) is fixedly connected with a Z-shaped bracket (18);
a main body portion of the Z-shaped bracket (18) located behind the heat dissipating fan (163);
a lamp bead plate driver (19) is fixedly connected to the rear side surface of the Z-shaped bracket (18);
for each layer of light source, a plurality of light source modules (1) are fixed on the side edge of the top of the same light source substrate (2) in a preset shape;
the light source substrate (2) in the multilayer light source is vertically provided with a plurality of substrate support frames (4) in a penetrating way and is fixedly connected together through the substrate support frames (4);
and the photoelectric control system (3) is used for acquiring one or more pieces of target information in front of the light source module (1) through the scene perception equipment, determining a light source layer to be turned on and the light source module of a specific direction to be turned on in the light source layer after calculating and analyzing the target information provided by the scene perception equipment, and controlling the turning-on.
2. The adaptive light source device according to claim 1, wherein a plurality of light source modules (1) are distributed in a semicircular shape, and the bottom of the Z-shaped bracket (18) in each light source module (1) is fixedly connected with the front side edge of the top of the same light source substrate (2);
the lamp bead lens (12) is used for realizing light gathering;
the angles of the lamp bead lenses (12) of each light source module (1) in each layer of light source are the same.
3. The adaptive light source device according to claim 2, wherein when the adaptive light source device comprises three layers of light sources, the angle of each bead lens (12) in the first layer of light sources is 20 °, the angle of each bead lens (12) in the second layer of light sources is 30 °, and the angle of each bead lens (12) in the third layer of light sources is 45 °.
4. The adaptive light source device according to claim 1, wherein when the adaptive light source device includes three layers of light sources, the slope angle of the upper sloped connector (14) and the lower sloped connector (15) in the first layer of light sources is 8 °;
the inclined plane angles of the upper inclined connector (14) and the lower inclined connector (15) in the second layer of light source are 14 degrees;
the inclined plane angle of the upper inclined connector (14) and the lower inclined connector (15) in the third layer of light source is 20 degrees;
the inclination angle of the light source module (1) included in each layer of light source is consistent with the inclined plane angle of the upper inclined connecting piece (14) and the lower inclined connecting piece (15) included in the layer of light source; the inclination angle of the light source module (1) specifically comprises the inclination angle of a lens cover plate (13), the inclination angle of a lamp bead plate (11) and the inclination angle of a heat conducting plate (161).
5. The adaptive light source device according to claim 1, wherein an angle between any two adjacent light source modules (1) on the same light source substrate (2) is 15 °.
6. The adaptive light source apparatus according to claim 1, wherein the target information obtained by the scene sensing device specifically includes: a target 3D coordinate, a target distance, a target azimuth and a target height;
after the photoelectric control system (3) performs calculation and analysis on the target information, the light source layer to be turned on and the light source module of the specific direction to be turned on in the light source layer are determined, and the method specifically comprises the following control operations:
firstly, the photoelectric control system (3) determines a light source layer needing to be opened according to a target distance in target information and a corresponding relation between a plurality of different pre-stored target distances and numbers of different light source layers;
then, the photoelectric control system (3) determines the light source module of the specific azimuth to be opened in the light source layer to be opened according to the target azimuth in the target information and the corresponding relation between the different light source module numbers and the different azimuths stored in advance in each light source layer, and then controls and starts the light source module.
7. The adaptive light source device according to claim 6, wherein the photoelectric control system (3) is further configured to, after controlling to activate a specific orientation light source module to be turned on in a light source layer to be turned on, acquire an iris image of a target by the iris camera, evaluate exposure of the iris image, and when overexposure or exposure is insufficient, send a current control signal to a lamp bead board driver (19) installed on the specific orientation light source module to be turned on, and correspondingly control the lamp bead board driver (19) to decrease or increase the magnitude of the output current.
8. The adaptive light source device according to claim 7, wherein the optoelectronic control system (3) evaluates the exposure level of the iris image, and specifically comprises the following evaluation steps:
firstly, a brightness aggregation method is used for positioning the face in a target image, and if the face in the target image cannot be positioned, the current target image is corrected to be dark and is underexposed; if the target image can be positioned, calculating the gray value in the preset region of interest in the target image, comparing the average gray value with a set standard value, and if the average gray value is larger than the set standard value, indicating overexposure.
9. The adaptive light source device according to claim 6, wherein the photoelectric control system (3) is further configured to, while controlling to start a specific orientation light source module to be opened in a light source layer to be opened, obtain the temperature of the surface of the heat conducting plate (161) on the light source module through a temperature sensor (17) on the light source module, and control to start a heat dissipation fan (163) installed on the heat conducting plate (161) when the temperature of the surface of the heat conducting plate (161) is greater than a preset threshold;
the photoelectric control system (3) is also used for controlling the heat radiation fan (163) to increase working current and further increase heat radiation power through a motor controller on the heat radiation fan (163) if the temperature value measured by a temperature sensor (173) on the light source module does not decrease after the heat radiation fan (163) is controlled to be started;
each temperature sensor (17) is connected with the photoelectric control system (3) and is used for detecting the temperature of the surface of a heat conducting plate (161) in the light source module (1) installed on the temperature sensor and then sending the temperature to the photoelectric control system (3).
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| CN201892101U (en) * | 2010-10-30 | 2011-07-06 | 华南理工大学 | Light source for automatic optical detector |
| CN206195905U (en) * | 2016-08-31 | 2017-05-24 | 广东中钰科技股份有限公司 | Light supplementing device of camera |
| CN207037682U (en) * | 2017-07-04 | 2018-02-23 | 北京中科虹霸科技有限公司 | A kind of iris image acquiring device of alternately polishing |
| CN207037685U (en) * | 2017-07-11 | 2018-02-23 | 北京中科虹霸科技有限公司 | One kind illuminates adjustable iris collection device |
| CN207264408U (en) * | 2017-09-08 | 2018-04-20 | 北京眼神科技有限公司 | A kind of iris identification device |
| CN207882924U (en) * | 2018-02-09 | 2018-09-18 | 天津中科虹星科技有限公司 | A kind of facial image acquisition device |
| CN108535265A (en) * | 2018-04-10 | 2018-09-14 | 深圳市纳研科技有限公司 | A kind of multi-angle polisher and acquisition system |
| CN208795989U (en) * | 2018-09-25 | 2019-04-26 | 东莞锐视光电科技有限公司 | A kind of multi-angle annular light source structure |
| CN109394168A (en) * | 2018-10-18 | 2019-03-01 | 天目爱视（北京）科技有限公司 | A kind of iris information measuring system based on light control |
| CN109394170A (en) * | 2018-10-18 | 2019-03-01 | 天目爱视（北京）科技有限公司 | A kind of iris information measuring system of no-reflection |
| CN110231289A (en) * | 2019-02-22 | 2019-09-13 | 广东工业大学 | A kind of automatic polisher of multiple light courcess and its image composition method |
| CN110443160A (en) * | 2019-07-18 | 2019-11-12 | 北京中科虹霸科技有限公司 | Method for collecting iris and device |
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Address after: 300457 unit msd-g1-1001, TEDA, No.57, 2nd Street, Tianjin Economic and Technological Development Zone, Binhai New Area, Tianjin Patentee after: Tianjin Zhongke intelligent identification Co.,Ltd. Address before: 300457 unit msd-g1-1001, TEDA, No.57, 2nd Street, Tianjin Economic and Technological Development Zone, Binhai New Area, Tianjin Patentee before: TIANJIN ZHONGKE INTELLIGENT IDENTIFICATION INDUSTRY TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |