CN216211150U - Palm print and palm vein image acquisition device - Google Patents
Palm print and palm vein image acquisition device Download PDFInfo
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- CN216211150U CN216211150U CN202122754968.1U CN202122754968U CN216211150U CN 216211150 U CN216211150 U CN 216211150U CN 202122754968 U CN202122754968 U CN 202122754968U CN 216211150 U CN216211150 U CN 216211150U
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Abstract
The utility model discloses a palm print and palm vein image acquisition device, which belongs to the technical field of biological feature acquisition, and comprises a PCB (printed circuit board), wherein the PCB is provided with a central processing unit and a palm print and palm vein feature acquisition module connected with the central processing unit, the palm print and palm vein feature acquisition module comprises a visible light lens module, an infrared light lens module, a visible light source and an infrared light source, the visible light lens module is arranged on the PCB and used for acquiring a palm print image, the infrared light lens module is used for acquiring the palm vein image, the visible light source is used for supplementing light for the visible light lens module, the infrared light source is used for supplementing light for the infrared light lens module, and liquid lenses are arranged on lenses of the visible light lens module and the infrared light lens module. The palm print and palm vein image acquisition device is small in size, convenient to carry and suitable for near, medium and long distances.
Description
Technical Field
The utility model relates to the technical field of biological characteristic acquisition, in particular to a palm print and palm vein image acquisition device.
Background
In the current information age, how to accurately identify the identity of a person and protect the information security becomes a key social problem which must be solved. The image acquisition equipment of human palm line and palm vein (promptly palm line palm vein) has advantages such as live body authentication, rate of accuracy height, irreproducible, the degree of safety is high, it is convenient to use, contactless, and it is not influenced by factors such as dry skin, humidity, also not influenced by such as age, and old man and child all can use, and non-contact biological identification mode receives the favor of more trades.
In the current products on the market, the distance for collecting the palm veins is generally 5-8 cm, 8-15 cm and 15-35 cm, and the distance is generally short distance, medium distance or long distance. The product with the collection range of 5-8 cm is not suitable for the position above 8 cm, the product with the collection range of 8-15 cm is not suitable for the position above 15 cm and below 8 cm, the product with the collection range of 15-35 cm is not suitable for the position below 15 cm, the existing product cannot be compatible with the three distance sections, the user experience is poor, the product cannot be collected and identified when the distance is too short, and the product cannot be collected and identified when the distance is too far. In addition, the image acquisition equipment of palm print palm vein adopts handheld mode mostly, consequently needs to possess characteristics such as small, conveniently carry.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a palm print and palm vein image acquisition device which is small in size, convenient to carry and suitable for near, medium and long distances.
In order to solve the technical problems, the utility model provides the following technical scheme:
the utility model provides a palm print palm vein image acquisition device, includes the PCB board, be equipped with central processing unit on the PCB board and with the palm print palm vein characteristic acquisition module that central processing unit connects, palm print palm vein characteristic acquisition module is including setting up be used for gathering the visible light camera lens module of palm print image, be used for gathering the infrared camera lens module of palm vein image, do on the PCB board the visible light source of visible light camera lens module light filling and do the infrared light source of infrared camera lens module light filling, all be equipped with liquid lens on the camera lens of visible light camera lens module and infrared camera lens module.
In some embodiments of the present invention, the visible light lens modules and the infrared light lens modules are both disposed in the middle of the PCB, the even number of visible light sources are located at two sides of the visible light lens modules, and the even number of infrared light sources are located at two sides of the infrared light lens modules.
In some embodiments of the present invention, the edge of the PCB board is provided with several atmosphere lamps connected to the cpu.
In some embodiments of the present invention, the back surface of the PCB board is provided with a heat sink, and/or the PCB board is covered with a lens.
In some embodiments of the present invention, a temperature measuring module connected to the central processing unit is disposed in the middle of the PCB.
In some embodiments of the present invention, the temperature measuring module includes an isolation sleeve and a temperature measuring sensor located in the isolation sleeve, and a height of the isolation sleeve is greater than or equal to a height of the visible light source and a height of the infrared light source.
In some embodiments of the present invention, a distance measuring module connected to the central processing unit is disposed in the middle of the PCB.
In some embodiments of the present invention, the PCB board is provided with a video capture/transmission module connected to the central processing unit;
and/or the PCB is provided with a palm print and palm vein recognition module connected with the central processing unit;
and/or a storage module connected with the central processing unit is arranged on the PCB.
In some embodiments of the present invention, the PCB board is provided with a data encryption module connected to the central processing unit.
In some embodiments of the present invention, the visible light lens module and the infrared light lens module are the same lens module, and the back of the lens module is provided with a visible light filter, an infrared light filter and a filter switching device.
The utility model has the following beneficial effects:
according to the palm print palm vein image acquisition device, the lenses of the visible light lens module and the infrared light lens module on the PCB are respectively provided with the liquid lens, the liquid lens takes liquid as the lens to change the focal length by changing the curvature of the liquid, the shape of liquid drops of the liquid lens can be changed by external voltage, the focal length of the liquid lens is further changed, automatic focusing and zooming are realized, image acquisition in a wider range is realized in a zooming mode, for example, the distance is 5-35 cm or even longer, the experience and convenience of users are improved, and the environment and the scene suitable for products are also increased. The palm print and palm vein image acquisition device is small in size, convenient to carry and suitable for near, medium and long distances.
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 structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the palm print and palm vein image acquisition device of the present invention;
fig. 2 is a schematic structural diagram of lenses of a visible light lens module and an infrared light lens module in the palm print and palm vein image acquisition device of the present invention;
fig. 3 is a schematic circuit diagram of the palm print and palm vein image acquisition device of the present invention.
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.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a palm vein image acquisition device, as shown in fig. 1-3, comprising a Printed Circuit Board (PCB) Board 1, wherein:
the PCB board 1 is provided with a central processing unit 2 and a palm print and palm vein feature acquisition module 3 connected with the central processing unit 2, the central processing unit 2 is responsible for information processing of each module of the palm print and palm vein, extraction of palm print and palm vein features, comparison of the palm print and palm vein features and the like, and the palm print and palm vein feature acquisition module 3 is responsible for acquiring a palm print picture and a palm vein picture and then extracting the palm print and palm vein features;
the palm print palm vein feature acquisition module 3 comprises a visible light lens module 31 arranged on the PCB board 1 and used for acquiring a palm print image, an infrared light lens module 32 used for acquiring the palm print image, a visible light source 33 for supplementing light for the visible light lens module 31, and an infrared light source 34 for supplementing light for the infrared light lens module 32, wherein liquid lenses 4 are arranged on lenses 311 and 321 of the visible light lens module and the infrared light lens module 31, and the liquid lenses 4 can be variable focus light lenses utilizing an electrowetting on dielectric (EWOD) principle.
The inventor finds that in the research process, a zoom lens can be used under the condition that the distance of 5-35 cm needs to be acquired under the conventional condition and the image is clear, and the zoom lens can change the focal length within a certain range, so that camera lenses with different wide and narrow field angles, images with different sizes and different scene ranges can be obtained. The principle of the zoom lens is to divide the lens of the lens into several lens groups, and change the focal length by changing the distance between different lens groups, so the volume of the zoom lens is generally larger, and particularly, the total length of the lens is larger, which causes the volume of the device to be increased, so the volume of the palm vein device manufactured by the zoom lens scheme is difficult to be reduced.
According to the palm print palm vein image acquisition device, the lenses of the visible light lens module and the infrared light lens module on the PCB are respectively provided with the liquid lens, the liquid lens takes liquid as the lens to change the focal length by changing the curvature of the liquid, the shape of liquid drops of the liquid lens can be changed by external voltage, the focal length of the liquid lens is further changed, automatic focusing and zooming are realized, image acquisition in a wider range is realized in a zooming mode, for example, the distance is 5-35 cm or even longer, the experience and convenience of users are improved, and the environment and the scene suitable for products are also increased. The palm print and palm vein image acquisition device is small in size, convenient to carry, capable of being suitable for near, middle and far distances, and small in lens size compared with the mode that clear imaging at a distance of 5-35 cm is achieved by only one zoom lens.
In the present invention, the extraction of the palm print features can adopt the conventional technology in the field, for example, a method using the extraction of the palm print features based on a filter (gabor): palmcode (palmcode), fusion code (fusion code), competitive code (competitive code). And (3) competitive coding: in the feature extraction, filters in 6 different directions are applied to surround a palm print image, then the filters in the dominant direction are coded into bit-wise representation, then feature codes are generated for the phases, and then the matching degree is represented by distance (hamming); competitive coding is a direction-based expression method, each pixel of a palm print image is solved, so that the image is mapped from a gray scale space to a direction information space, and then matching is carried out.
As shown in fig. 1, in order to make the overall structure compact, the visible light lens module 31 and the infrared light lens module 32 may be both disposed in the middle of the PCB board 1, the visible light sources 33 are even and located at two sides of the visible light lens module 31, and the infrared light sources 34 are even and located at two sides of the infrared light lens module 32. In the embodiment shown in the figure, the number of the visible light sources 33 is two and located at two sides of the visible light lens module 31, and the number of the infrared light sources 34 is two and located at two sides of the infrared light lens module 32. The light sources 33 and 34 are used as active light sources for collecting the images of the palm prints and the palm veins, and provide illumination effects for the palm prints and the palm veins, the wavelength of the visible light source 33 is preferably 400-500nm, and the visible light source is used as the active light source for collecting the images of the palm prints; the wavelength of the infrared light source 34 is preferably 800-900nm, and the infrared light source is an active light source for collecting the palm vein image. The visible light source 33 and the infrared light source 34 may each include an LED and an LED cover, which functions to uniformize light.
To improve the use of image acquisition, the edge of the PCB board 1 may be provided with several atmosphere lamps (not shown) connected to the central processor 2. Considering that the dual lens module requires a platform main chip with higher calculation power, i.e. the cpu 2, the temperature of the cpu 2 is relatively high, close to 50 degrees celsius, and therefore a heat sink (not shown) may be disposed on the back of the PCB 1. The PCB 1 may also be covered with a lens (not shown) to protect the internal structure from dust.
As shown in fig. 3, the middle of the PCB board 1 may be provided with a temperature measuring module 13 connected to the central processor 2, so that the palm temperature of the user can be measured while collecting the palm vein image. The temperature measuring module 13 preferably comprises an isolation sleeve and a temperature measuring sensor located in the isolation sleeve, and the height of the isolation sleeve is greater than or equal to the height of the visible light source 33 and the height of the infrared light source 34, so that light rays of the visible light source 33 and the infrared light source 34 can be effectively prevented from entering the isolation sleeve to interfere with the temperature measuring sensor.
The middle part of PCB board 1 can be equipped with the range finding module 14 (specifically can adopt range finding sensor) of being connected with central processing unit 2, can be convenient for measure the distance of palm and camera lens front end, when the distance is very near or very far away, can combine together with the voice prompt of hardware, reminds the user.
In order to display the palm print or palm vein image displayed in real time on a PC or a device terminal, the PCB board 1 may be provided with a video capture/transmission module 15 connected to the central processor 2, and the video capture/transmission module 15 may include an image sensor and a USB interface. In order to compare the extracted palm print with the palm vein features, a palm print and palm vein recognition module 16 connected with the central processing unit 2 can be arranged on the PCB board 1. The palm print palm vein recognition module 16 can be generally divided into an authentication mode and a recognition mode.
In order to store the palm print and palm vein pictures and characteristics, the PCB board 1 may be provided with a storage module 18 connected with the central processor 2. In order to encrypt the palm print and palm vein picture and characteristics and prevent the personal biological information from being stolen and utilized by a third party, the PCB board 1 can be provided with a data encryption module 17 connected with the central processing unit 2. For convenience of power supply, the PCB 1 is provided with a power module 19 connected with the CPU 2.
In summary, the usage of the palm print and palm vein image acquisition device of the present invention can refer to the following:
when the palm print monitoring system is used, the visible light lens module 31 is responsible for collecting palm print images, the palm print part is illuminated through the visible light source 33, then the palm print images are collected through the lens of the visible light lens module 31 and transmitted to the image sensor, and finally the images are transmitted to a PC (personal computer) end or an equipment terminal through the USB (universal serial bus) interface; the infrared lens module 32 is responsible for collecting palm vein images, irradiates vein blood vessels inside the palm through the infrared light source 34, reflects infrared light by hemoglobin in the vein blood vessels, collects the vein images through a lens of the infrared lens module 32 (i.e., a lens module with an infrared narrowband filter), and transmits the images to a PC computer terminal or an equipment terminal through a USB interface.
In order to save cost, in an improved embodiment, the visible light lens module 31 and the infrared light lens module 32 may be the same lens module, and the back of the lens module is provided with a visible light filter, an infrared light filter and a filter switching device. At this time, for light sources with different wavelengths, the filter switching device can be used to switch between the visible light filter and the infrared light filter so as to collect palm print and palm vein images respectively. The optical filter switching device is a conventional device, and the specific structure thereof is not described again, for example, a dual optical filter switch of model 15H77B-1 from shang guan.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. The utility model provides a palm print palm vein image acquisition device, its characterized in that, includes the PCB board, be equipped with central processing unit on the PCB board and with the palm print palm vein characteristic acquisition module that central processing unit connects, palm print palm vein characteristic acquisition module is including setting up be used for gathering the visible light camera lens module of palm print image, be used for gathering the infrared light camera lens module of palm vein image on the PCB board, do the visible light source of visible light camera lens module light filling and do the infrared light source of infrared light camera lens module light filling, all be equipped with liquid lens on the camera lens of visible light camera lens module and infrared light camera lens module.
2. The palm print and palm vein image acquisition device according to claim 1, wherein the visible light lens module and the infrared light lens module are both disposed in the middle of the PCB board, the visible light sources are even and located on both sides of the visible light lens module, and the infrared light sources are even and located on both sides of the infrared light lens module.
3. The palm print and palm vein image acquisition device according to claim 1, wherein a plurality of atmosphere lamps connected with the central processing unit are arranged at the edge of the PCB.
4. The palm print palm vein image acquisition device according to claim 1, wherein a heat sink is arranged on the back surface of the PCB, and/or a lens is arranged on the PCB in a covering manner.
5. The palm print and palm vein image acquisition device according to claim 1, wherein a temperature measurement module connected with the central processing unit is arranged in the middle of the PCB.
6. The palm print palm vein image acquisition device according to claim 5, wherein the temperature measurement module comprises an isolation sleeve and a temperature measurement sensor positioned in the isolation sleeve, and the height of the isolation sleeve is greater than or equal to the height of the visible light source and the height of the infrared light source.
7. The palm print and palm vein image acquisition device according to claim 1, wherein a distance measurement module connected with the central processing unit is arranged in the middle of the PCB.
8. The palm print and palm vein image acquisition device according to claim 1, wherein a video acquisition/transmission module connected with the central processing unit is arranged on the PCB;
and/or the PCB is provided with a palm print and palm vein recognition module connected with the central processing unit;
and/or a storage module connected with the central processing unit is arranged on the PCB.
9. The palm print and palm vein image acquisition device according to claim 1, wherein a data encryption module connected with the central processing unit is arranged on the PCB.
10. The palm print and palm vein image acquisition device according to any one of claims 1 to 9, wherein the visible light lens module and the infrared light lens module are the same lens module, and a visible light filter, an infrared light filter and a filter switching device are arranged on the back of the lens module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122754968.1U CN216211150U (en) | 2021-11-11 | 2021-11-11 | Palm print and palm vein image acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122754968.1U CN216211150U (en) | 2021-11-11 | 2021-11-11 | Palm print and palm vein image acquisition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216211150U true CN216211150U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122754968.1U Active CN216211150U (en) | 2021-11-11 | 2021-11-11 | Palm print and palm vein image acquisition device |
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| CN (1) | CN216211150U (en) |
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- 2021-11-11 CN CN202122754968.1U patent/CN216211150U/en active Active
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