CN112668554A - Vein collection device and vein collection identification method - Google Patents
Vein collection device and vein collection identification method Download PDFInfo
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- CN112668554A CN112668554A CN202110062360.4A CN202110062360A CN112668554A CN 112668554 A CN112668554 A CN 112668554A CN 202110062360 A CN202110062360 A CN 202110062360A CN 112668554 A CN112668554 A CN 112668554A
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- 210000003462 vein Anatomy 0.000 title claims abstract description 166
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Abstract
The application discloses a vein collection device and a vein collection identification method. The vein collection device comprises a base, a finger support, an infrared light source, a first support and a second support. The finger rest can slide along the base. The infrared light source is used for emitting infrared light towards the plane where the finger rest slides. The first end of the first support is hinged with a fixing piece arranged on the base. The first end of the second bracket is hinged with the second end of the first bracket. The second end of the second bracket is hinged with the finger support. When the finger support slides towards the fixing piece, the second support can be driven to fold towards the first support. The camera captures images of veins of a finger placed on the finger rest when the second support is folded towards the first support. The vein collection device and the vein collection and identification method enable the second support to be folded towards the first support to stand up when the finger support slides towards the fixing piece, so that a camera can collect vein images of fingers conveniently, the thickness of the vein collection device can be reduced, and thinning of products is facilitated.
Description
Technical Field
The application relates to the technical field of biological identification, in particular to a vein collection device and a vein collection identification method.
Background
In the related art, the finger vein collection device, the camera and the light source are often arranged in the cavity of the collection device in an opposite side mode, and a finger needs to be accommodated between the camera and the light source to collect veins of the finger, so that the finally formed collection device is often large in thickness and large in occupied space, and cannot be applied to some use scenes requiring thinning.
Disclosure of Invention
An object of the application is to provide a vein collection device and a vein collection identification method to solve the technical problem that exists among the prior art: the thickness and the size of the finger vein collection device are often larger, and the occupied space is larger.
In order to solve the technical problem, the following technical scheme is adopted in the application:
the embodiment of the application provides a vein collection device. The vein collection device includes: a base; the finger rest is arranged on the base and can slide along the base; the infrared light source is arranged on the base and used for emitting infrared light towards the plane where the finger rest slides; the first end of the first bracket is hinged with a fixing piece arranged on the base; the first end of the second bracket is hinged with the second end of the first bracket, the second end of the second bracket is hinged with the finger support, and the finger support can be driven to fold towards the first bracket when sliding towards the fixing piece; a camera disposed on the second support, the camera capturing vein images of fingers placed on the finger rest when the second support is folded toward the first support.
In some embodiments, the first end of the first bracket is coupled to the fixed member by a first pivot. And the first end of the second bracket is connected with the second end of the first bracket through a second rotating shaft. And the second end of the second bracket is connected with the finger support through a third rotating shaft. The first rotating shaft, the second rotating shaft and the third rotating shaft are arranged in parallel in pairs.
In some embodiments, application of an external force to the finger rest to slide the finger rest can switch the vein collection device between a flat state and a standing state. Wherein, when the finger rest is in an initial position, the vein collection device is in the flat state. The flat state is that the first support and the second support are close to the base. When the finger rest is between the initial position and the fixing part, the vein collection device is in the standing state. The standing state is a state in which the second stand is folded toward the first stand so that the first stand and the second stand with respect to the base.
In some embodiments, a first spring is disposed on the first shaft and a second spring is disposed on the second shaft. Under the condition that the vein collection device is in the flat state, the first spring and the second spring are both in a natural state; under the condition that the vein collection device is in the standing state, the first spring and the second spring are both in an energy storage state; when the vein collection device is in the standing state and the first spring and the second spring are in the energy storage state, if the external force disappears, the vein collection device is restored from the standing state to the flat state under the action of the spring force.
In some embodiments, the base is provided with a guide rail. The finger rest is embedded in the guide rail to slide along the guide rail. The guide rail restricts movement of the finger rest in a thickness direction of the base.
In certain embodiments, the venous collection device further comprises a stop device. The limiting device is arranged on the base and used for limiting the stroke of the finger support sliding along the guide rail.
In some embodiments, the stop device is a stop block. The limiting block, the first support and the second support are arranged on the same surface of the base, and the limiting block protrudes out of the surface of the base. Under the condition that the vein collection device is in the flat state, the limiting block is abutted to the first support or the second rotating shaft.
In certain embodiments, the venous collection device further comprises: the touch sensor is arranged on the base and between the limiting device and the infrared light source, and is used for sensing the position of the finger rest; the processor is used for controlling the infrared light source to be turned on and controlling the camera to take one or more pictures to obtain the vein image when the touch sensor senses that the finger rest is located at a preset position.
In some embodiments, the camera is an infrared camera or a visible light camera provided with an infrared filter.
An embodiment of the present application further provides a vein collection and identification method, which is applicable to the vein collection device according to any one of the above embodiments, and the vein collection and identification method includes:
acquiring the state of a touch sensor;
when the state of the touch sensor is a sensing state, turning on the infrared light source, and controlling the camera to shoot one or more vein images, wherein the sensing state is triggered when the touch sensor senses that the finger rest is located at a preset position;
extracting feature data of the vein image to store the feature data in a database or matching the feature data with the feature data in the database and outputting a matching result.
According to the technical scheme, the method has at least the following advantages and positive effects:
the vein collection device and the vein collection and identification method of the embodiment of the application enable the second support to be folded towards the first support when the finger support slides towards the fixing piece of the base on the base through the finger support, enable the second support to be erected when the finger support slides towards the fixing piece of the base, enable the camera arranged on the second support to have a certain height and enable the camera and the infrared light source to be arranged oppositely through the finger support, enable the camera to collect vein images of fingers placed on the finger support, enable the finger support to slide back to an original position after collection of the vein images of the camera, enable the folding heights of the first support and the second support to be relieved, enable the thickness dimension of the vein collection device to be reduced, and enable the vein collection device to be easy to store, the occupied space is small, and the thinning of products and related application scenes is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a vein collection device according to an embodiment of the present disclosure in a flat state;
FIG. 2 is a schematic cross-sectional view of the vein collection device of FIG. 1 taken along line II-II;
FIG. 3 is a schematic view of a vein collection device according to an embodiment of the present disclosure in an erected state;
fig. 4 is a schematic flow chart of a vein collection and identification method according to an embodiment of the present application;
fig. 5 is a schematic diagram illustrating extraction of feature data of a vein image according to an embodiment of the present application.
The reference numerals are explained below:
100. a vein collection device;
10. a base;
101. a fixing member;
102. a guide rail;
103. a limiting device;
20. a finger rest;
201. an initial position;
202. presetting a position;
30. an infrared light source;
40. a first bracket;
401. a first end of a first bracket;
402. a second end of the first bracket;
50. a second bracket;
501. a first end of a second bracket;
502. a second end of the second bracket;
60. a camera;
70. a first rotating shaft;
71. a first spring;
80. a second rotating shaft;
81. a second spring;
90. a third rotating shaft;
91. a third spring;
110. a touch sensor.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "third" are used 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, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "communicate", "mount", "connect", and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The embodiment of the application provides a vein collection device 100. The vein collection apparatus 100 includes: a base 10; a finger rest 20 provided on the base 10, the finger rest 20 being slidable along the base 10; an infrared light source 30 provided on the base 10 for emitting infrared light toward the plane where the finger rest 20 slides; the first end 401 of the first bracket 40 is hinged with the fixing piece 101 arranged on the base 10; the first end 501 of the second bracket 50 is hinged with the second end 402 of the first bracket 40, the second end 502 of the second bracket 50 is hinged with the finger rest 20, and the finger rest 20 can drive the second bracket 50 to fold towards the first bracket 40 when sliding towards the fixing part 101; and a camera 60 disposed on the second support 50, the camera 60 collecting a vein image of a finger placed on the finger rest 20 when the second support 50 is folded toward the first support 40.
The vein collection device 100 and the vein collection and identification method of the embodiment of the application are provided with the finger rest 20, the second support 50 hinged with the finger rest 20 and the first support 40 hinged with the second support 50, so that the second support 50 can be folded towards the first support 40 when the finger rest 20 slides towards the fixing part 101 of the base 10 on the base 10, so that the second support 50 can stand up when the finger rest 20 slides towards the fixing part 101, so that the camera 60 arranged on the second support 50 can have a certain height and the camera 60 and the infrared light source 30 are arranged opposite to each other by the finger rest 20, thereby being convenient for the camera to collect vein images of fingers arranged on the finger rest, and after the collection of the vein images of the camera is finished, the finger rest can slide back to the original position, the folding heights of the first support and the second support can be released, thereby reducing the thickness dimension of the vein collection device, the vein collection device is easy to store, occupies a small space and is beneficial to thinning of products and related application scenes.
The following is further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, the vein collection device 100 includes a base 10, a finger rest 20, an infrared light source 30, a first bracket 40, a second bracket 50, and a camera 60.
The base 10 may be a square plate-like base 10 for supporting and connecting components of the vein collection device 100.
The finger rest 20 is provided on the base 10, and the finger rest 20 can slide along the base 10. In some embodiments, the base 10 is provided with a guide rail 102, and the finger rest 20 can be embedded in the guide rail 102 to slide along the guide rail 102, so that the sliding of the finger rest 20 can be smooth. In a specific example, the direction in which the finger rest slides may be the Y direction as shown in fig. 2 and 3. The guide rail 102 restricts the movement of the finger rest 20 in the thickness direction of the base 10. Specifically, the thickness direction is the X direction shown in fig. 2 and 3. The thickness direction of the base 10 is perpendicular to the Y direction in which the finger rest 20 slides along the guide rail 102. The guide rail 102 limits the movement of the finger rest 20 in the thickness direction of the base 10, so that the finger rest can slide in the direction perpendicular to the thickness direction of the base 10, and further drives the second bracket and the first bracket to stand up and restore to flat adhesion in the thickness direction of the base, so that the thickness of the vein collection device can be kept light and thin when the vein collection device is not used, and when the vein collection device needs to be used, the second bracket and the first bracket stand up in the thickness direction of the base so that the camera can complete collection of vein images, and the light and thin structure of the product is facilitated.
An infrared light source 30 is provided on the base 10 for emitting infrared light toward the plane where the finger rest 20 slides.
The first end 401 of the first bracket 40 is hinged with the fixing member 101 provided on the base 10. Specifically, the first end 401 of the first bracket 40 is connected to the fixed member 101 through the first rotating shaft 70.
The first end 501 of the second bracket 50 is hingedly connected to the second end 402 of the first bracket 40. The second end 502 of the second bracket 50 is hingedly connected to the finger rest 20. Specifically, the first end 501 of the second bracket 50 is connected to the second end 402 of the first bracket 40 via the second rotating shaft 80. The second end 502 of the second bracket 50 is connected to the finger rest 20 via the third pivot 90. The first, second and third rotating shafts 70, 80 and 90 may be disposed in parallel two by two. When the finger rest 20 slides towards the fixing member 101, the second bracket 50 can be folded towards the first bracket 40.
The camera 60 is disposed on the second carriage 50. Specifically, the camera 60 may be embedded in the second holder 50, so that when the finger rest 20 is in the original position, the second holder 50 is configured to lie flat against the base 10 to save space occupied by the vein collection device 100 when not in use. The camera 60 captures a vein image of a finger placed on the finger rest 20 when the second holder 50 is folded toward the first holder 40. The vein image may be a finger vein image. Specifically, as shown in fig. 3, the vein collection area of the finger vein image may be an area between a first joint and a second joint at the finger tip of the finger, which is beneficial to obtaining more abundant vein information, so that the vein collection and identification can be more accurate.
The camera 60 may be an infrared camera 60 or a visible light camera 60 provided with an infrared filter. The infrared camera 60 is advantageous for acquiring clearer vein images. The visible camera 60 provided with the infrared filter can transmit only infrared light through the infrared filter, and thus can effectively avoid interference of ambient light on imaging of the vein image.
Application of an external force to the finger rest 20 to slide the finger rest 20 enables the vein collection device 100 to be switched between the flat-laid state and the standing state. Referring to fig. 2, when the finger rest 20 is in the initial position 201, the vein collection device 100 is in a flat state. The flat state is a state in which the first bracket 40 and the second bracket 50 are close to the base 10. Referring to fig. 3, the vein collection device 100 is in a standing state when the finger rest 20 is between the initial position 201 and the fixing member 101. The standing state is a state in which the second bracket 50 is folded toward the first bracket 40 so that the first bracket 40 and the second bracket 50 stand with respect to the base frame 10. When the vein collection device 100 is in the standing state, the camera provided on the second holder may have a certain height and be disposed opposite to the infrared light source across the finger rest, thereby facilitating the camera to collect vein images of the finger placed on the finger rest.
The first shaft 70 is provided with a first spring 71, and the second shaft 80 is provided with a second spring 81. In some embodiments, the third shaft 90 is provided with a third spring 91.
In the case where the vein collection device 100 is in the flat state, both the first spring 71 and the second spring 81 are in the natural state. When the vein collection device 100 is in the flat state, if an external force pushes the finger rest 20 to slide toward the fixing member 101, the second holder 50 is folded toward the first holder 40 to convert the vein collection device 100 into the standing state.
In some embodiments, with the vein collection device 100 in the standing state, both the first spring 71 and the second spring 81 are in the charged state. In some embodiments, with the vein collection device 100 in the standing state, both the second spring 81 and the third spring 91 are in the charged state. In some embodiments, with the vein collection device 100 in the standing state, the first spring 71, the second spring 81, and the third spring 91 are all in the charged state. In the case where the vein collection device 100 is in the standing state and one or more of the first spring 71, the second spring 81, and the third spring 91 are in the energy storage state, if the external force disappears, the vein collection device 100 is restored from the standing state to the flat state by the spring force. From this, place the finger and promote the finger support slip and accomplish the collection back of vein image on pointing the support, the finger leaves and points the support, external force disappears, vein collection system 100 can restore into the flat state of pasting by the state of standing under the effect of spring force this moment, thereby the folding height of first support and second support can be relieved, and then can make the thickness size of vein collection system restore into the state of light thinization under the flat state of pasting, make vein collection system easily accomodate, occupation space is less, be favorable to the slimming of product and relevant application scene.
The vein collection device 100 also includes a stop device 103. A stop device 103 is provided on the base 10 for limiting the travel of the finger rest 20 sliding along the guide rail 102. The limiting device 103 is a limiting block. The limiting block 103, the first bracket 40 and the second bracket 50 are disposed on the same surface of the base 10, and the limiting block 103 protrudes from the surface of the base 10. Under the condition that the vein collection device 100 is in a flat state, the limiting block 103 may be abutted against the first support 40 or the second rotating shaft 80, so that the first support 40, the second rotating shaft 80 and the second support 50 are not in a state of being completely attached to the base 10, but the first support 40, the second rotating shaft 80 and the second support 50 are in a micro-arch state, and a gap is formed between the first support 40, the second support 80 and the base 10, so that when the finger rest 20 slides towards the fixing member 101, the second support can be smoothly folded towards the first support 40 with a small resistance, and the vein collection device 100 is in a standing state.
The vein collection device 100 may also include a touch sensor 110 and a processor 120.
The touch sensor 110 is disposed on the base 10 and between the position limiting device 103 and the infrared light source 30. Touch sensor 110 is used to sense the position of finger rest 20. The touch sensor 110 may be a photocoupler or a capacitive touch sensor, etc. When the finger rest 20 slides to the preset position 202 above the touch sensor 110, the touch sensor 110 outputs a sensing signal, and the processor 120 receives the sensing signal and controls the infrared light source 30 to turn on and the camera 60 to take one or more pictures to obtain the vein image. The predetermined position 202 may be directly above the touch sensor 110, or just after the finger rest 20 contacts the touch sensor 110. Therefore, when the finger pushes the finger rest 20 and slides the finger rest 20 to the preset position 202, the infrared light source 30 is controlled to be turned on and the camera 60 is controlled to take one or more pictures to obtain the vein image, so that the timing of turning on the light source and collecting the vein image is controlled, and the vein image with a more appropriate visual field is collected.
Further, the preset position 202 may be a position of the finger rest 20 when the finger rest 20 abuts against the stop block 103 and the finger rest 20 is located above the touch sensor 110, which is shown in fig. 3 and is a case where the finger rest 20 is located at the preset position 202. When the finger rest 20 is in the preset position 202, the vein collection device 100 is in a standing state, as shown in fig. 3, the focus area a of the camera view is just the area between the first joint and the second joint at the tip of the finger, the infrared light source 30 is turned on and the camera 60 is controlled to take one or more pictures to obtain the vein image, which is beneficial to accurately collecting the vein characteristics of the area between the first joint and the second joint at the tip of the finger.
Referring to fig. 4, the vein collection and identification method according to the embodiment of the present application is applied to the vein collection device 100 according to any one of the above embodiments. The vein collection and identification method comprises the following steps:
s01: acquiring the state of the touch sensor 110;
s02: when the touch sensor 110 is in a sensing state, turning on the infrared light source to control the camera 60 to shoot one or more vein images, wherein the sensing state is triggered when the touch sensor 110 senses that the finger rest 20 is located at the preset position 202;
s03: extracting feature data of the vein image to store the feature data in a database or matching the feature data with the feature data in the database and outputting a matching result.
Specifically, the state of the touch sensor 110 may include a sensing state and a non-sensing state. The sensing state is triggered when the finger rest 20 is at a predetermined position 202 above the touch sensor 110. When the touch sensor 110 no longer senses that the finger rest 20 is at the predetermined position 202 above the touch sensor 110, the touch sensor is in a non-sensing state.
After the control camera 60 captures one or more vein images, feature data may be extracted from the captured one or more vein images respectively to store the feature data in the database; or processing one or more collected vein images to obtain a processed vein image, extracting characteristic data of the processed vein image, and storing the characteristic data into a database to finish the collection of vein characteristics. Furthermore, the feature data can be encrypted and then stored in the database, so that the security of the feature data in the database can be improved, and the feature data in the database can be prevented from being stolen or tampered.
As shown in fig. 5, the process of extracting feature data from the vein image may be to perform image processing such as binarization on the collected vein image to obtain a binary black-and-white image as the feature data. In some embodiments, the feature data may also be an array or the like extracted from the acquired vein image.
In specific application, the vein collection device and the vein collection and identification method can be applied to an access control system or a safe case or a password cabinet for collection, identification and unlocking. After the vein image is acquired, the matching and comparing process of the feature data corresponding to the vein image can be further included.
The vein collection identification method can control the vein collection device to work in an input mode or a matching mode.
In the case where the vein collection apparatus is in the entry mode, the vein collection identification method may include the steps of:
extracting characteristic data of the vein image;
encrypting the characteristic data to obtain encrypted characteristic data;
storing the encrypted feature data in a database.
In the case where the vein collection apparatus is in the matching mode, the vein collection identification method may include the steps of:
extracting characteristic data of the vein image;
calling the encrypted feature data from the database;
decrypting the encrypted feature data to obtain key feature data;
and matching the characteristic data with the key characteristic data and outputting a matching result according to the matching degree of the characteristic data and the key characteristic data.
In a specific embodiment, after the vein image is acquired and the feature data of the vein image is extracted, the feature data may be matched with the feature data in the database and a matching result may be output, so that the feature data is obtained by acquiring and identifying the current vein, and the feature data is compared and matched with the feature data stored in the database and the matching result is output. Therefore, when the matching degree of the feature data of the current vein and the key feature data stored in the database is higher than the preset matching degree, for example, the matching degree of the feature data of the current vein and the key feature data stored in the database is higher than 70%, 80%, 90% or 95%, the vein collection device judges that the matching result is successful, and outputs the matching result of successful matching. The equipment connected with the vein collection device, such as a door lock, a safe lock, a coded cabinet lock and the like, can open the lock according to the matching result of successful matching, and therefore intelligentization and lightness of door lock control can be achieved. Further, if the feature data is encrypted and then stored in the database after the collection of the finger veins is completed, the feature data of the current vein is matched with the decrypted key feature data after the key feature data is required to be decrypted after the key feature data is called from the database.
In summary, the vein collection device 100 and the vein collection and identification method according to the embodiment of the present invention are configured such that the finger rest 20, the second holder 50 hinged to the finger rest 20, and the first holder 40 hinged to the second holder 50 are provided, so that the second holder 50 can be folded toward the first holder 40 when the finger rest 20 slides on the base 10 toward the fixing member 101 of the base 10, so that the second holder 50 can be erected when the finger rest 20 slides toward the fixing member 101, so that the camera 60 provided on the second holder 50 can have a certain height and the camera 60 and the infrared light source 30 are disposed opposite to each other across the finger rest 20, so that the camera can collect vein images of fingers placed on the finger rest, and after collection of the vein images of the camera is completed, the folded heights of the first holder and the second holder can be released, so that the thickness dimension of the vein collection device can be reduced, the vein collection device is easy to store, occupies a small space and is beneficial to thinning of products and related application scenes.
In the description of embodiments of the present application, any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection having one or more wires (control method), a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the embodiments of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A vein collection device, comprising:
a base;
the finger rest is arranged on the base and can slide along the base;
the infrared light source is arranged on the base and used for emitting infrared light towards the plane where the finger rest slides;
the first end of the first bracket is hinged with a fixing piece arranged on the base;
the first end of the second bracket is hinged with the second end of the first bracket, the second end of the second bracket is hinged with the finger support, and the finger support can be driven to fold towards the first bracket when sliding towards the fixing piece;
a camera disposed on the second support, the camera capturing vein images of fingers placed on the finger rest when the second support is folded toward the first support.
2. The vein collection device according to claim 1, wherein a first end of the first holder is connected to the fixing member by a first pivot, a first end of the second holder is connected to a second end of the first holder by a second pivot, and a second end of the second holder is connected to the finger rest by a third pivot; the first rotating shaft, the second rotating shaft and the third rotating shaft are arranged in parallel in pairs.
3. The vein collection device of claim 2, wherein application of an external force to the finger rest to slide the finger rest switches the vein collection device between a flat position and a raised position, wherein when the finger rest is in an initial position, the vein collection device is in the flat position, and wherein the flat position is a position in which the first and second brackets are proximate to the base; when the finger rest is located between the initial position and the fixing part, the vein collection device is in the standing state, and the standing state is a state that the second support is folded towards the first support so that the first support and the second support stand relative to the base.
4. The vein collection device according to claim 3, wherein the first shaft is provided with a first spring, and the second shaft is provided with a second spring;
under the condition that the vein collection device is in the flat state, the first spring and the second spring are both in a natural state;
under the condition that the vein collection device is in the standing state, the first spring and the second spring are both in an energy storage state;
when the vein collection device is in the standing state and the first spring and the second spring are in the energy storage state, if the external force disappears, the vein collection device is restored from the standing state to the flat state under the action of the spring force.
5. A vein collection device according to any of claim 4 wherein the base is provided with a guide track in which the finger rest is embedded to slide along the guide track, the guide track limiting movement of the finger rest in the thickness direction of the base.
6. The vein collection device according to claim 5, further comprising a stop device disposed on the base for limiting the travel of the finger rest sliding along the guide rail.
7. The vein collection device according to claim 6, wherein the limiting device is a limiting block, the limiting block is arranged on the same surface of the base as the first bracket and the second bracket, and the limiting block is arranged to protrude from the surface of the base; under the condition that the vein collection device is in the flat state, the limiting block is abutted to the first support or the second rotating shaft.
8. The vein collection device of claim 6, further comprising:
the touch sensor is arranged on the base and between the limiting device and the infrared light source, and is used for sensing the position of the finger rest;
the processor is used for controlling the infrared light source to be turned on and controlling the camera to take one or more pictures to obtain the vein image when the touch sensor senses that the finger rest is located at a preset position.
9. A vein collection device according to any of claims 1-8 wherein said camera is an infrared camera or a visible light camera provided with an infrared filter.
10. A vein collection and identification method applied to the vein collection device according to any one of claims 1 to 9, the vein collection and identification method comprising:
acquiring the state of a touch sensor;
when the state of the touch sensor is a sensing state, turning on the infrared light source, and controlling the camera to shoot one or more vein images, wherein the sensing state is triggered when the touch sensor senses that the finger rest is located at a preset position;
extracting feature data of the vein image to store the feature data in a database or matching the feature data with the feature data in the database and outputting a matching result.
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