CN109409293A - Finger vein identification device based on NB-IoT - Google Patents
Finger vein identification device based on NB-IoT Download PDFInfo
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- CN109409293A CN109409293A CN201811263426.0A CN201811263426A CN109409293A CN 109409293 A CN109409293 A CN 109409293A CN 201811263426 A CN201811263426 A CN 201811263426A CN 109409293 A CN109409293 A CN 109409293A
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- finger
- microprocessor
- iot
- vein
- module
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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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/143—Sensing or illuminating at different wavelengths
-
- 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
- G06V40/14—Vascular patterns
Abstract
The present invention is based on the finger vein identification devices of NB-IoT, including vein image acquisition device and data transmission module;Vein image acquisition device includes microprocessor, finger groove, contact-making switch, multiple infrared LEDs lamps, voice module, multiple ultraviolet light LED light, camera, NB-IoT chip and power module;Data transmission module, including NB-IoT chip, for the finger vein image that microprocessor in the vein image acquisition device receives to be uploaded to terminal device by NB-IoT technology.The present invention can be separated module by technology of Internet of things, and terminal and image capture module can be with telecommunications, mobility, good portability, while being carried out disinfection sterilization processing using ultraviolet light, and more safety and sanitation are easily received by user.
Description
Technical field
The present invention relates to biometrics identification technology field more particularly to a kind of finger hand vein recognition dresses based on NB-IOT
It sets.
Background technique
Refer to that hand vein recognition is one kind of biometrics identification technology, refers to that vein identification technology can be inhaled according to blood flow
The characteristic of receipts feature wavelength relationship irradiates finger using near infrared light, can take the finger vein image of invasion.Due to referring to
Vein pattern is difficult to be replicated, and everyone finger vein pattern is different from, while increasing with the age and hardly occurring
Variation, therefore refer to that vein identification technology has the characteristics that vivo identification, highly-safe, uniqueness, it is managed in company gate inhibition, hotel
Reason, government organs, prison access control, medical verification etc. have huge application prospect.
Current finger vein identification device does not use NB-IoT technology as communication mode, when NB-IoT supports standby
Between efficient connection long, to network connectivity requirements higher device, there is the characteristics of wide covering, magnanimity connection and low-power consumption, very
Meet vein identification device and needs requirement standby and fast recognition speed for a long time.Meanwhile using NB-IoT technology by image
Acquisition device and terminal device separation, mobility, good portability.
Summary of the invention
The technical problem to be solved in the present invention is that for above-mentioned current finger vein identification device to network environment requirement
Higher deficiency provides the finger vein identification device based on NB-IOT and solves above-mentioned technological deficiency.
Finger vein identification device based on NB-IoT, including vein image acquisition device and data transmission module;
The vein image acquisition device further includes microprocessor 23, finger groove 13, contact-making switch 131, multiple infrared rays
LED light 11, voice module 24, multiple ultraviolet light LED light 12, camera 14, NB-IoT chip 22 and power module 25;
Microprocessor 23 is for controlling multiple infrared LEDs lamps 13, multiple ultraviolet light LED light 12, camera 14 and language
Sound module 24, and receive the finger vein image of the acquisition of camera 14;The multiple infrared LEDs lamp 11 is being arranged in finger groove 13 just
Top, for infrared ray to be vertically projected to finger;Camera 14 is located at the underface of finger groove, refers to vein figure for acquiring
Picture, and it is transmitted to microprocessor 23;The multiple ultraviolet light LED light 12 is arranged in the upper side of finger groove 13, for issuing purple
Outside line carries out disinfection sterilization;There is a rectangular recess below finger groove 13, places the camera 14 among rectangular recess;
A contact-making switch 131 is placed with finger touch part in 13 inside of finger groove, and contact-making switch 131 is connect with microprocessor 23, is used
After perception finger exits finger groove 13, carried out by the multiple ultraviolet light LED light emitting ultraviolet light of microprocessor driven
Sterilizing processing;Power module 25 is used to power to whole device;The voice module 24 is connect with microprocessor 23, is used for
Customized suggestion voice is played by the driving of microprocessor 23;
The data transmission module, including NB-IoT chip 22, for being adopted the vein image by NB-IoT technology
The finger vein image that microprocessor 23 receives in acquisition means is uploaded to terminal device.
Further, data transmission module further includes USB interface 21, for supporting USB Type-C Interface Expanding.
Further, for the terminal device for pre-processing to the finger vein image received, pretreatment includes ROI
It is accurately positioned and ROI is normalized, obtain referring to vein gray level image;The terminal device is extracted from finger vein gray level image to be referred to
Vein network takes multi-template matching method or other matching process in the finger vein network and presetting database handled well
Finger intravenous data matched, and matching result is fed back into microprocessor 23, microprocessor 23 by data transmission module
Driving the voice module 24 to issue corresponding suggestion voice indicates final result.
Further, it includes finger edge detection, the correction of finger tilt degree, removal noise, interception ROI that ROI, which is accurately positioned,
Width and height;ROI normalization includes size normalization and gray scale normalization.
The beneficial effects of the present invention are: the present apparatus uses technology of Internet of things, is guaranteeing image information transmission rate situation
Under, will acquisition equipment separated with terminal and can with used in the longer-distance situation of terminal, improve mobility and just
The property taken;The finger groove of contact can prevent position from correcting on finger, can preferably extract vein image feature, enhancing
Refer to the stability of vein recognition system;Ultraviolet radiator carries out disinfection sterilization processing to device after user exits finger, more dry
Net health.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structure chart of the finger vein identification device the present invention is based on NB-IoT;
Fig. 2 is the cross-sectional view of the structure of the finger vein identification device the present invention is based on NB-IoT;
Fig. 3 is the NB-IoT chip circuit figure of the finger vein identification device the present invention is based on NB-IoT;
Fig. 4 is that the NB-IoT chip of the finger vein identification device the present invention is based on NB-IoT connects microcontroller circuit figure.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
Finger vein identification device based on NB-IoT, as shown in Figure 1 and Figure 2, including vein image acquisition device and data pass
Defeated module;
Vein image acquisition device further includes microprocessor 23, finger groove 13, contact-making switch 131, multiple infrared LEDs lamps
11, voice module 24, multiple ultraviolet light LED light 12, camera 14, NB-IoT chip 22 and power module 25.
Microprocessor 23 is for controlling multiple infrared LEDs lamps 13, multiple ultraviolet light LED light 12, camera 14 and language
Sound module 24;The multiple infrared LEDs lamp 11 is arranged in right above finger groove 13, for infrared ray to be vertically projected to finger
On;Camera 14 is located at the underface of finger groove, refers to vein image for acquiring;The multiple ultraviolet light LED light 12 is arranged in
The upper side of finger groove 13 carries out disinfection sterilization for issuing ultraviolet light;There is a rectangular recess below finger groove 13, it is rectangular
The camera 14 is placed among connected in star;A contact-making switch 131, contact are placed with finger touch part in 13 inside of finger groove
Switch 131 is connect with microprocessor 23, for perceiving after finger exits finger groove 13, passes through the multiple purple of microprocessor driven
Outside line LED light emitting ultraviolet light carries out sterilizing processing;Power module 25 is used to power to whole device;The voice mould
Block 24 is connect with microprocessor 23, for playing customized suggestion voice by the driving of microprocessor 23.
Data transmission module includes NB-IoT chip 22 and USB interface 21, and NB-IoT technology has super low-power consumption, superelevation quick
The characteristics of sensitivity, data transmission module are acquired the finger vein image acquisition device using NB-IoT technology or USB interface
To finger vein image be uploaded to terminal device.
Terminal device is using a kind of finger vein image data that finger vein identification technology sends the data transmission module
Pre-processed, feature extraction and matching, terminal device can be a computer, terminal device include a database to
Treated finger vein image data are stored, which can be used to save the finger vein image of user's registration and know
The finger vein image recorded when calling registration when other.
Terminal device is to the pretreatment operation for referring to vein image and carrying out received, including ROI is accurately positioned and ROI returns
One changes, and it includes finger edge detection, the correction of finger tilt degree, removal noise, interception ROI width and height that ROI, which is accurately positioned,;
ROI normalization includes size normalization and gray scale normalization.Terminal device is extracted from finger vein gray level image refers to rete venosum
Network feature, including patterned feature, textural characteristics, minutiae feature and the feature obtained by machine learning, patterned feature can
To use linearity tracking algorithm to extract;The feature extraction mode of the local binary patterns of weighting can be used in textural characteristics;
Such as Principle components analysis (PCA) method, Fisher face (LDA) is used to obtain by the feature that machine learning obtains.Eventually
End equipment takes multi-template matching method or other matching process in the finger vein network and the database handled well
Refer to that intravenous data is matched, obtain matching result, and matching result is fed back into microprocessor 23 by data transmission module,
Microprocessor 23, which drives the voice module 24 to issue corresponding suggestion voice, indicates final result.
The NB-IoT chip circuit schematic diagram of present example is as shown in Figure 3, Figure 4, and pin 21 is a Universal Die in Fig. 3
Number converter, pin 26 give external circuit supply 3V voltage, the VBAT voltage range of pin 45,46 between 3.1V to 4.2V,
Pin 51,52,53,54 connects an antenna, and BAT1 should be able to supply the electric current of minimum 0.5A;Fig. 4 indicates BC95 chip and Wei Chu
The connection type of device is managed, wherein RI pin can export indication signal when this kind of activity of such as SMS occurs.Remaining circuit portion
Camera such as is divided to use OV7725, LED light can connect 5V voltage by series and parallel compensated resistance or drive using PWM wave;Micro process
Device is integrated with USB peripheral using STM32, and the interface circuit of USB repeats no more, and VS1053 module can be used in voice module, uses
TTP223 is as contact-making switch, and the level of I/O interface sends variation after detecting that finger is put into, and uses this level as entirely quiet
The switching signal of arteries and veins image capturing system.
Design of the invention makes an excuse technology by technology of Internet of things and USB, module can be separated, terminal is adopted with image
Collecting module can be with telecommunication, mobility, good portability, while being carried out disinfection sterilization processing using ultraviolet light, safer
Health is easily received by user.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (4)
1. the finger vein identification device based on NB-IoT, which is characterized in that transmit mould including vein image acquisition device and data
Block;
The vein image acquisition device further includes microprocessor (23), finger groove (13), contact-making switch (131), multiple infrared
Line LED light (11), voice module (24), multiple ultraviolet light LED light (12), camera (14), NB-IoT chip (22) and electricity
Source module (25);
Microprocessor (23) for control multiple infrared LEDs lamps (13), multiple ultraviolet light LED light (12), camera (14) with
And voice module (24), and receive the finger vein image of camera (14) acquisition;The multiple infrared LEDs lamp (11) is arranged in
Right above finger groove (13), for infrared ray to be vertically projected to finger;Camera (14) is located at the underface of finger groove, uses
Refer to vein image in acquisition, and is transmitted to microprocessor (23);The multiple ultraviolet light LED light (12) is arranged in finger groove (13)
Upper side, carry out disinfection sterilization for issuing ultraviolet light;There are a rectangular recess, rectangular recess below finger groove (13)
Place the camera (14) in centre;Finger groove (13) is internal to place a contact-making switch (131), contact with finger touch part
Switch (131) is connect with microprocessor (23), for perceiving after finger exits finger groove (13), by described in microprocessor driven
Multiple ultraviolet light LED light emitting ultraviolet lights carry out sterilizing processing;Power module (25) is used to power to whole device;Institute
It states voice module (24) to connect with microprocessor (23), for playing customized suggestion voice by microprocessor (23) driving;
The data transmission module, including NB-IoT chip (22), for passing through NB-IoT technology for the vein image acquisition
The finger vein image that microprocessor (23) receives in device is uploaded to terminal device.
2. the finger vein identification device according to claim 1 based on NB-IoT, which is characterized in that data transmission module is also
Including USB interface (21), for supporting USB Type-C Interface Expanding.
3. the finger vein identification device according to claim 1 based on NB-IoT, which is characterized in that the terminal device is used
It is pre-processed in the finger vein image received, pretreatment includes ROI accurate positioning and ROI normalization, obtains referring to quiet
Arteries and veins gray level image;The terminal device from refer to vein gray level image in extract refers to vein network, take multi-template matching method or
Other matching process of person match the finger vein network handled well with the finger intravenous data in presetting database, and will matching
As a result it is fed back to microprocessor (23) by data transmission module, microprocessor (23) drives the voice module (24) to issue phase
Corresponding suggestion voice indicates final result.
4. the finger vein identification device according to claim 3 based on NB-IoT, which is characterized in that ROI is accurately positioned packet
Include finger edge detection, the correction of finger tilt degree, removal noise, interception ROI width and height;ROI normalization is returned including size
One change and gray scale normalization.
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Cited By (2)
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CN111723696A (en) * | 2020-06-05 | 2020-09-29 | 华北电力大学扬中智能电气研究中心 | Finger vein recognition device |
JP7470616B2 (en) | 2020-10-30 | 2024-04-18 | 株式会社日立製作所 | Personal authentication device |
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