Finger vein recognizer

Abstract

The utility model provides a finger vein recognizer which comprises a tubular shell arranged at the bottom, and a tube seat is fixed in the tubular shell. A super semiconductor luminous source for emitting near-infrared light, a photosensitive element for receiving reflected near-infrared light and converting an optical signal into an image, and a conversion element for converting the image into an electric signal are arranged on the tube seat; a tube sleeve is arranged at the top of the tubular shell; a transparent cover body used for covering an end opening of the pipe sleeve is arranged at one end, far away from the tubular shell, of the pipe sleeve, fingers are placed on the top of the transparent cover body, and a plurality of through holes for leading wires to penetrate through are formed in the pipe base. According to the finger vein recognizer provided by the utility model, the position of the finger vein is limited, the emitted near-infrared light is in the recognizer and is not influenced by the external environment, and the recognition precision is improved.

Description

Technical Field

[0001] This application belongs to the technical field of security identification, and particularly relates to a finger vein identifier. Background Art

[0002] An accurate and efficient identification system is a key factor to ensure the reliable operation of identity recognition devices. Traditional biometric technologies include fingerprint recognition, face recognition, iris recognition, etc., which mainly rely on external biometric features of the human body. However, these external features are easily affected by environmental factors. For example, fingerprints may be worn or contaminated, and face recognition may be affected by light and expression changes.

[0003] Finger vein recognition is a biometric technology that uses the vein images inside the human finger for identity verification. It irradiates the finger with near-infrared light to obtain the distribution image of finger veins, and then compares it with the pre-stored finger vein template to achieve highly secure identity authentication. When using finger veins for identity authentication, the obtained image features of finger veins are features that only exist when the finger is alive. A non-living finger cannot obtain vein image features and thus cannot be recognized, so it cannot be forged, which makes finger vein recognition a highly secure authentication method. Existing finger vein identifiers are non-contact biometric recognition devices. Only when the user places the finger in a specific area can it be accurately recognized. The non-contact operation process is relatively abstract, and users need time to adapt to how to correctly use non-contact devices, resulting in poor user experience. The near-infrared light emitted by the light source of existing finger vein identifiers directly irradiates the outside world, and the near-infrared light is extremely vulnerable to the environment, reducing the recognition accuracy of the identifier. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides a finger vein identifier, which limits the position of finger veins, and the emitted near-infrared light is inside the identifier and is not affected by the external environment, improving the recognition accuracy.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A finger vein identifier includes a tubular housing provided at the bottom. A tube seat is fixed inside the tubular housing. The tube seat is provided with a super semiconductor light source for emitting near-infrared light, a photosensitive element for receiving the reflected near-infrared light and converting the optical signal into an image, and a conversion element for converting the image into an electrical signal. A tube sleeve is provided at the top of the tubular housing. A transparent cover body for covering the port of the tube sleeve is provided at one end of the tube sleeve away from the tubular housing. A finger is placed on the top of the transparent cover body. A plurality of through holes for the leads to pass through are opened on the tube seat.

[0007] Further, the super semiconductor light source includes a base fixedly connected to the socket and a light-emitting component disposed on the base. The super semiconductor light source is disposed at the center of the socket. The light-emitting component is provided with a dome-shaped semi-circular top surface for uniformly emitting near-infrared light towards the transparent cover body, avoiding uneven light distribution. The parameters of the super semiconductor light source are set such that the super semiconductor light source emits short-waveband near-infrared light towards the transparent cover body. When a finger touches the transparent cover body, most of the near-infrared light is reflected by the finger vein in the finger, and most of the near-infrared light is transmitted through the muscle and bone.

[0008] Further, the tubular housing is detachably connected to the tube sleeve. The inner surface of the tubular housing above the socket is provided with lower connecting threads for connecting with the tube sleeve, and the lower part of the tube sleeve is provided with upper connecting threads matching the lower connecting threads. The detachable connection is achieved through the threaded connection between the tubular housing and the tube sleeve, which facilitates the maintenance and handling inside the finger vein identifier. When the inside of the finger vein identifier needs to be repaired, rotate the tube sleeve to separate the tube sleeve from the tubular housing.

[0009] Further, the socket is a circular plate, and the socket is coaxially connected to the tubular housing. The socket and the tubular housing are preferably integrally formed. The socket is used to place the super semiconductor light source, the photosensitive element, and the conversion element.

[0010] Further, the photosensitive elements are preferably multiple and are evenly distributed around the super semiconductor light source. The photosensitive elements are sensitive to optical signals. The multiple photosensitive elements are used to receive the reflected near-infrared light in all directions. Since the finger vein has a strong reflection effect on the short-waveband near-infrared light, other parts of the finger reflect a small part of the near-infrared light. The photosensitive elements receive optical signals with different intensities and convert them into bright and dark images according to the received intensity signals, that is, finger vein images.

[0011] Further, the conversion element is connected to the photosensitive element. The conversion element receives the image information of the photosensitive element and converts it into an electrical signal. The electrical signal is output through the lead wire to the storage unit for storage.

[0012] Further, the transparent cover body is made of a low-fluidity material, and its state is between a colloidal fluid and an elastic solid. The colloidal fluid can be, for example, silica gel, and the elastic solid can be, for example, rubber. When a finger touches the transparent cover body and then relaxes naturally, the transparent cover body adsorbs and wraps the finger and fills the concave and convex surfaces of the fingerprint. The finger fits tightly with the transparent cover body. When the finger leaves, the transparent cover body returns to its original state. The transparent cover body positions the finger, improving the recognition efficiency.

[0013] Further, the lead wire passes through the tubular housing and extends to the outside of the entire tubular housing. The lead wire includes a power lead wire, a signal lead wire, and a ground lead wire. The super semiconductor light source, the photosensitive element, and the conversion element are all connected to the power lead wire. The output end of the conversion element is connected to the signal lead wire. The ground lead wire is used for the circuit to be safely grounded.

[0014] Further, an annular step for supporting the transparent cover body is provided inside the sleeve, and the step is arranged above the upper connecting thread and is preferably integrally formed with the sleeve.

[0015] Further, the base, the tubular housing and the sleeve are components made of plastic material.

[0016] Advantages of the utility model:

[0017] A finger vein identifier provided by the utility model, by providing a transparent cover body at the port of the sleeve, does not affect the penetration of near-infrared light, and is used to place the finger to limit the position of the finger; by providing a tubular housing, a base is arranged inside the tubular housing, a super semiconductor light source is fixed at the center of the base, a transparent cover body is arranged at the port of the sleeve, and the near-infrared light emitted by the super semiconductor light source directly irradiates the transparent cover body. At the same time, due to the adsorption and wrapping of the finger by the transparent cover body, the influence of environmental factors such as external air or dust on the near-infrared light is reduced, and the recognition accuracy is improved. A finger vein identifier of the utility model accurately captures the reflected image of the finger vein, the transparent cover body adapts to the finger shapes of different users, limits the finger position, and is simple and practical. Description of the drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of a finger vein identifier of the utility model.

[0019] Figure 2 It is a sectional perspective view of a finger vein identifier of the utility model.

[0020] Figure 3 It is an exploded view of a finger vein identifier of the utility model.

[0021] Figure 4 It is a sectional view of the sleeve.

[0022] Reference numerals:

[0023] 1 - tubular housing, 101 - lower connecting thread, 2 - base, 3 - super semiconductor light source, 301 - base, 302 - light emitting component, 4 - photosensitive element, 5 - conversion element, 6 - sleeve, 601 - upper connecting thread, 7 - transparent cover body, 8 - lead wire, 801 - power supply lead wire, 802 - signal lead wire, 803 - ground lead wire, 9 - step. Detailed implementation manners

[0024] It should be noted that, without conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more than two.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0027] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0028] As Figures 1-4 shown, a finger vein identifier includes a tubular housing 1 provided at the bottom. A tube seat 2 is fixed inside the tubular housing 1. The tube seat 2 is provided with a super semiconductor light source 3 for emitting near-infrared light, a photosensitive element 4 for receiving the reflected near-infrared light and converting the optical signal into an image, and a conversion element 5 for converting the image into an electrical signal. A tube sleeve 6 is provided at the top of the tubular housing 1. One end of the tube sleeve 6 away from the tubular housing 1 is provided with a transparent cover body 7 for covering the port of the tube sleeve 6. A finger is placed on the top of the transparent cover body 7. The tube seat 2 is provided with a plurality of through holes 8 for the leads to pass through.

[0029] The super semiconductor light source 3 includes a base 301 fixedly connected to the socket 2 and a light emitting element 302 disposed on the base 301. The super semiconductor light source 3 is disposed at the center of the socket 2. The light emitting element 302 is provided with a dome-shaped semi-circular top surface for uniformly emitting near-infrared light towards the transparent cover 7, avoiding uneven light distribution. The parameters of the super semiconductor light source 3 are set such that the super semiconductor light source 3 emits short-wave near-infrared light towards the transparent cover 7. When a finger touches the transparent cover 7, most of the near-infrared light is reflected by the finger vein in the finger, and most of the near-infrared light is transmitted through the muscle and bone.

[0030] The tubular housing 1 is detachably connected to the tube sleeve 6. The inner surface of the tubular housing 1 above the socket 2 is provided with a lower connecting thread 101 for connecting with the tube sleeve 6. The lower part of the tube sleeve 6 is provided with an upper connecting thread 601 matching the lower connecting thread 101. The detachable connection is achieved through the threaded connection between the tubular housing 1 and the tube sleeve 6, which facilitates the maintenance and processing inside the finger vein identifier. When internal maintenance of the finger vein identifier is required, rotate the tube sleeve 6 to separate the tube sleeve 6 from the tubular housing 1.

[0031] The socket 2 is a circular plate, and the socket 2 is coaxially connected to the tubular housing 1. The socket 2 and the tubular housing 1 are preferably integrally formed. The socket 2 is used to place the super semiconductor light source 3, the photosensitive element 4, and the conversion element 5.

[0032] The photosensitive element 4 is preferably multiple and is evenly distributed around the super semiconductor light source 3. The photosensitive element 4 is sensitive to optical signals. The multiple photosensitive elements 4 are used to receive the reflected near-infrared light in all directions. Since the finger vein has a strong reflection effect on short-wave near-infrared light, other parts of the finger reflect a small part of the near-infrared light. The photosensitive element 4 receives light signals with different intensities and converts them into bright and dark images according to the received intensity signals, that is, finger vein images.

[0033] The conversion element 5 is connected to the photosensitive element 4. The conversion element 5 receives the image information of the photosensitive element 4 and converts it into an electrical signal. The electrical signal is output to the storage unit through the lead 8 for storage.

[0034] The transparent cover 7 is made of a low-fluidity material, and its state is between a gel-like fluid and an elastic solid. The gel-like fluid can be, for example, silica gel, and the elastic solid can be, for example, rubber. When a finger touches the transparent cover 7 and naturally relaxes, the transparent cover 7 adsorbs and wraps the finger and fills the concave and convex surfaces of the fingerprint. The finger is closely attached to the transparent cover 7. When the finger leaves, the transparent cover 7 returns to its original state. The transparent cover 7 positions the finger, improving the recognition efficiency.

[0035] The lead wire 8 passes through the tubular housing 1 and extends to the outside of the entire tubular housing 1. The lead wire 8 includes a power lead wire 801, a signal lead wire 802, and a ground lead wire 803. The super semiconductor light source 3, the photosensitive element 4, and the conversion element 5 are all connected to the power lead wire 801. The output end of the conversion element 5 is connected to the signal lead wire 802, and the ground lead wire 803 is used for the safe grounding of the circuit.

[0036] Inside the ferrule 6, there is an annular step 9 for supporting the transparent cover body 7. The step 9 is arranged above the upper connecting thread 601, and the step 9 is preferably integrally formed with the ferrule 6.

[0037] The socket 2, the tubular housing 1, and the ferrule 6 are components made of plastic material.

[0038] The photosensitive element 4 and the conversion element 5 adopt means well-known to those skilled in the art.

[0039] The finger vein identifier of the present utility model can be applied to special occasions such as intelligent building systems, intelligent residential systems, bank financial access control, and high-end hotels.

[0040] The working principle of the present utility model:

[0041] (1) First, pre-store the finger vein information of the user. The operation process includes: the user touches the transparent cover body 7 of the finger vein identifier and relaxes naturally. The transparent cover body 7 adsorbs and wraps the finger and fills the concave and convex surfaces of the fingerprint. The finger fits tightly with the transparent cover body 7. The super semiconductor light source 3 emits multiple short-wave near-infrared light beams in the direction of the transparent cover body 7. The finger vein has a strong reflection effect on the short-wave near-infrared light, and other parts of the finger reflect a small part of the near-infrared light. The photosensitive element 4 receives the light signals with different intensities and converts them into light and dark images according to the received intensity signals, that is, finger vein images. The conversion element 5 receives the image information of the photosensitive element 4 and converts it into an electrical signal. The electrical signal is output through the lead wire 8 to the storage unit for storage.

[0042] (2) When the user uses the finger vein identifier, the finger touches the transparent cover body 7 again, repeating step (1), and matching the collected image information with the data stored in the storage unit to achieve the identification of personal identity.

[0043] The preferred embodiments of the present utility model have been described above. However, the above description is not for the purpose of limitation. Those of ordinary skill in the art can make many changes or modifications to the present utility model without departing from the gist and scope of the present utility model. The said changes or modifications should be included within the scope of the appended claims.

Claims

1. A finger vein recognition device, characterized in that: The invention comprises a tubular shell (1) arranged at the bottom, a tube base (2) being fixed inside the tubular shell (1), a super semiconductor light source (3) for emitting near-infrared light, a photosensitive element (4) for receiving reflected near-infrared light and converting light signals into images, and a conversion element (5) for converting images into electrical signals, a tube sleeve (6) being arranged at the top of the tubular shell (1), a transparent cover (7) for covering the port of the tube sleeve (6) being arranged at one end of the tube sleeve (6) away from the tubular shell (1), a finger being placed on the top of the transparent cover (7), and a plurality of through holes for lead wires (8) to pass through being opened on the tube base (2).

2. The finger vein identifier according to claim 1, characterized in that: The super-semiconductor light source (3) comprises a base (301) fixedly connected to a tube base (2) and a light-emitting component (302) arranged on the base (301); the super-semiconductor light source (3) is arranged at the center of the tube base (2); and the light-emitting component (302) is provided with a dome-shaped semicircular top surface.

3. The finger vein identifier according to claim 1, characterized in that: The tubular shell (1) is detachably connected to the pipe sleeve (6); the inner surface of the tubular shell (1) above the pipe seat (2) is provided with a lower connecting thread (101) for connecting to the pipe sleeve (6); the lower part of the pipe sleeve (6) is provided with an upper connecting thread (601) matching the lower connecting thread (101); and the detachable connection is achieved through the threaded connection between the tubular shell (1) and the pipe sleeve (6).

4. The finger vein identifier according to claim 1 or 3, characterized in that: The tube base (2) is a circular plate, and is coaxially connected to the tubular shell (1). The tube base (2) is used to place a super semiconductor light source (3), a photosensitive element (4) and a conversion element (5).

5. The finger vein identifier according to claim 1, characterized in that: There are multiple photosensitive elements (4) which are evenly distributed around the super semiconductor light source (3).

6. The finger vein identifier according to claim 5, characterized in that: The conversion element (5) is connected to the photosensitive element (4), and the conversion element (5) receives image information from the photosensitive element (4) and converts it into an electrical signal, and the electrical signal is output to the storage unit via a lead (8) for storage.

7. The finger vein identifier according to claim 1, characterized in that: The transparent cover (7) is made of low-fluidity material.

8. The finger vein identifier according to claim 1, characterized in that: The lead wire (8) passes through the tubular shell (1) and extends to the outside of the entire tubular shell (1). The lead wire (8) includes a power lead wire (801), a signal lead wire (802) and a ground lead wire (803). The super semiconductor light source (3), the photosensitive element (4) and the conversion element (5) are all connected to the power lead wire (801), the output end of the conversion element (5) is connected to the signal lead wire (802), and the ground lead wire (803) is used for circuit safety grounding.

9. The finger vein identifier according to claim 1, characterized in that: An annular step (9) for supporting the transparent cover (7) is provided inside the pipe sleeve (6), and the step (9) is arranged above the upper connecting thread (601).

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