CN102004903B - Anti-counterfeiting fingerprint identification device and fingerprint identification method - Google Patents
Anti-counterfeiting fingerprint identification device and fingerprint identification method Download PDFInfo
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- CN102004903B CN102004903B CN 201010548200 CN201010548200A CN102004903B CN 102004903 B CN102004903 B CN 102004903B CN 201010548200 CN201010548200 CN 201010548200 CN 201010548200 A CN201010548200 A CN 201010548200A CN 102004903 B CN102004903 B CN 102004903B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
Abstract
The invention discloses an anti-counterfeiting fingerprint identification device and an anti-counterfeiting fingerprint identification method. The device is provided with a sense control unit which comprises a CapSenseSigma-Delta (CSD) chip, wherein the CSD sense chip is connected with a conductive film. Fingerprints of living organisms are judged by recording an increment in the CSD sense chip and summating numeric codes converted by a modulator. The fingerprint identification method comprises the following steps in turn: 1) initializing; 2) circuit self-checking; 3) performing a corresponding program according to information input by a user; 4) judging whether to communicate; 5) acquiring image data; and 6) comparing registered users. The device of the invention has low cost, can output a signal by touching lightly, does not need to adopt any distortion correction optical element, and can reduce manufacturing cost and realize miniaturization; the linear distortion relationship obtained by comparing an acquired fingerprint image with an actual fingerprint image can be corrected by software; and therefore, the device has the advantages of high quality of acquired optical imaging image, high fingerprint identification reliability, low error identification rate, good effect on anti-counterfeiting fingerprints, simple structure and low power consumption.
Description
Technical field
The present invention relates to device or method that the applying electronic circuit carries out fingerprint recognition, particularly relate to a kind of false proof fingerprint identification device and fingerprint identification method thereof.
Background technology
In the existing recognition technology with physiological characteristic, fingerprint identification technology is at present the most ripe a kind of.Yet, existing fingerprint identification technology and product also exist the following shortcoming incompatible with demand: fingerprint identification device can recognize that by using the plasticity marking duplicate of finger can compare success, therefore can not get rid of reading of false fingerprint, and the fingerprint capturer structure is complicated, volume is bigger, and production cost is higher, in addition, fingerprint image distortion and trimming process are handled and are owed perfect, cause the second-rate of image imaging.
Summary of the invention
A technical matters to be solved by this invention is the defective that remedies above-mentioned prior art, and a kind of false proof fingerprint identification device is provided.
Another technical matters to be solved by this invention is the defective that remedies above-mentioned prior art, and a kind of false proof fingerprint identification method is provided.
False proof fingerprint identification device technical matters of the present invention is solved by the following technical programs.
This false proof fingerprint identification device, comprise fingerprint capturer, fingerprint capturer comprises housing, image acquisition units, the finger sensing unit, the induction control module, back light unit, and data communication interface, described finger sensing unit comprises conductive film, described conductive film is connected with described induction control module, described back light unit comprises light emitting diode (light emitting diode, initialism is LED) light source, Dove prism, the lens combination on same horizontal line with described Dove prism and described image acquisition units is independently finished the user fingerprints registration respectively, user fingerprints is gathered.
The characteristics of this false proof fingerprint identification device are:
Described induction control module comprises capacitive sensing (the CapSense Sigma-Delta that adopts delta-sigma modulator, initialism is CSD) chip, the voltage conversion unit that is connected with described CSD induction chip respectively, storage unit and data communication interface, described voltage conversion unit also respectively with described image acquisition units, storage unit connects, described storage unit also is connected with described image acquisition units respectively with described data communication interface, it is an I/O port that connects the CSD induction chip of described induction control module by lead that described conductive film is connected with described induction control module, and described induction electro-conductive glass sheet is formed the touch sensible capacitor C with the described conductive film that is connected to described CSD induction chip I/O mouth
Sensor
Described CSD induction chip provides the capacitance sensing function that adopts switched capacitor technique, will be corresponding digital code by its current conversion by wherein delta-sigma modulator.Delta-sigma modulator in the CSD induction chip is by 1 comparer, 1 comparer latch of CSD induction chip inside and be connected to the modulating capacitor C of two I/O interfaces of CSD induction chip
ModWith discharge resistance R
bConstitute.Delta-sigma modulator makes modulating capacitor C by replacing the on/off discharge switch
ModWith discharge resistance R
bBetween form the charged circulation, with modulating capacitor voltage V
CmodRemain on reference voltage V
RefNear, described reference voltage V
RefNumerical value determines fingerprint capturer to gather the sensitivity of face.In addition, touch sensible capacitor C
SensorVoltage with modulating capacitor voltage V
CmodAs reference voltage.Whether carrying out fingerprint of biological living body greater than default digital code threshold value by the digital code of recording increment sigma modulator conversion judges:
The digital code of delta-sigma modulator conversion is the initial code of presetting, and is judged as not point to restrain fingerprint capturer, the appearance value C of corresponding touch sensible electric capacity
SensorThe basic maintenance, change small appearance value, and the magnitude of voltage of touch sensible electric capacity remains on modulating capacitor voltage V
CmodNear;
The digital code of delta-sigma modulator conversion is judged as pseudo-finger and restrains fingerprint capturer, corresponding touch sensible capacitor C less than default digital code threshold value
SensorThe appearance value increase modulating capacitor voltage V
CmodAlso increase modulating capacitor voltage V
CmodWith reference voltage V
RefCompare its difference V
ModLess than preset threshold value, described CSD induction chip sends to described control module by the I/O port and does not gather the instruction of fingerprint signal, or passes through I
2The C communication interface is not gathered the fingerprint signal instruction to the register transmission of the color cmos chip of image acquisition units;
The digital code of delta-sigma modulator conversion is judged as true finger and restrains fingerprint capturer, corresponding touch sensible capacitor C greater than default digital code threshold value
SensorThe appearance value increase modulating capacitor voltage V
CmodAlso increase modulating capacitor voltage V
CmodWith reference voltage V
RefCompare its difference V
ModGreater than preset threshold value, described CSD induction chip sends the instruction of gathering fingerprint signal by the I/O port to described control module, or passes through I
2The C communication interface sends the instruction of collection fingerprint signal to the register of the color cmos chip of image acquisition units, and fingerprint signal enters the color cmos chip of image acquisition units through light path, and passes through I
2C interface arranges the register of color cmos chip, comprises the setting to information such as acquisition window size, acquisition window starting point, time shutter, gains.The control image acquisition units is worked immediately.
False proof fingerprint identification device technical matters of the present invention is solved by following further technical scheme.
Described Dove prism is that the base, longitudinal section is greater than high six prisms symmetrically, include be parallel to each other over against large end face, small end face, downside and its excess-three side, described large end face is the image acquisition face, described small end face is that light source is injected face, described downside is the imaging surface relative with image-forming objective lens, and the surface of its excess-three side is coated with the pitch-dark layer for shading.
Described lens combination comprises upper strata lens and lower floor's lens, distance between upper strata lens and the lower floor's lens is adjustable, the color cmos chip of image acquisition units is arranged on the image planes of lens combination, image in the light of collection information in fingerprint is presented on the colored CMO chip photosensitive array, and convert electric signal to, carry out communication by data Communication Interface and external control unit.
Described conductive film is the rectangular parallelepiped of rule, and the one side of described conductive film adopts plating indium technology to be attached at the end on the upper side that described Dove prism surface-coated is useful on pitch-dark layer upper side of shading, forms touch sensible electric capacity with described Dove prism.Can improve induction efficiency, save manufacturing cost.
Described finger sensing unit also comprises induction electro-conductive glass sheet, described induction electro-conductive glass sheet is connected with described Dove prism, employing is at ultraviolet light (Ultraviolet Rays, initialism is UV) irradiation is solidified down or the UV glue of sclerosis is fitted the image acquisition face of described induction electro-conductive glass sheet and described Dove prism, and an end on the long limit of the transparency electrode conductive layer of described induction electro-conductive glass sheet and the conductive film of regular rectangular parallelepiped connects to form touch sensible electric capacity.
Described back light unit also comprises diffusion sheet, and described diffusion sheet is attached at the led light source of described Dove prism and injects face, i.e. the small end face of described Dove prism.The light of led light source disperses by diffusion sheet and is radiated at equably on the image acquisition face of Dove prism, to the finger illumination of being gathered, neither dazzling, can avoid information in fingerprint fully not identified conversion by imageing sensor again, thereby improve degree of accuracy and the sharpness of fingerprint collecting, significantly improve acquisition quality and recognition efficiency.
Described induction electro-conductive glass sheet comprises at least one transparent insulating layer and at least one transparency electrode conductive layer, and transparent insulating layer is arranged on the transparency electrode conductive layer, and the transparency electrode conductive layer is made up of at least one electrode.When having only a transparency electrode conductive layer, only be provided with a transparent insulating layer, and the transparency electrode conductive layer is arranged on the plane of described transparent insulating layer.
Described transparent insulating layer is made by the optical clear insulating material, and preferably, described transparent insulating layer is glass substrate.Transparent insulating layer is restrained the workplace of gathering image as finger, is used for surveying the capacitance variations that the live body finger touches.
Described transparency electrode conductive layer is made by transparent conductive material, and preferably, described transparency electrode conductive layer is tin indium oxide (Indium tin oxide, initialism are ITO).Transparency conducting layer is used for surveying the capacitance variations of live body finger touch and corresponding electric signal is transferred to external circuit as the workplace of capacitance touch induction.
Described image acquisition units, described induction control module, described storage unit and described data communication interface are arranged on the fingerprint capturer mainboard, and described image acquisition units and described induction control module pass through I separately
2The C PORT COM connects the I of inner separately EEROM
2The C PORT COM is carried out the parameter setting to the EEROM register of described image acquisition units and described induction control module self, comprises acquisition window size and starting point, time shutter are set, and gain, be used for the distortion of correction software correcting image.
Described image acquisition units comprises the color cmos chip, and the crystal oscillator and the reset circuit that are connected with described color cmos chip respectively.
Described led light source is arranged on the top of described Dove prism small end face, and described led light source plate is connected with described fingerprint capturer mainboard by lead, to LED power supply and altogether.
False proof fingerprint identification device technical matters of the present invention is solved by following further technical scheme again.
Described diffusion sheet is tygon (Polyethylene, initialism are PE) film, and adopting model is MB-433P bottom diffusion barrier, has the effect of disperse light, even soft light.
Fingerprint of biological living body recognition device of the present invention also comprises control module, external communication interface, human-computer interaction interface, pilot lamp, real time clock circuit, lock control and warning device, and output control circuit, described real time clock circuit is connected with control module, and described lock control is connected with described output control circuit with warning device.
Described control module adopts the master-slave mode based on dual-CPU architecture, comprises main control unit and connected from the control unit.When main control unit breaks down cisco unity malfunction, still can control fingerprint verifying apparatus from the control unit and carry out necessary work, to improve system reliability.
Described main control unit is the CPU of 32 Embedded RISC chip cores of ARM company design, is connected with fingerprint capturer, external communication interface respectively.Main control unit is by reading user's keyboard operation data, real-time clock data and transmitting the information that will show from the control unit.
Described is 8 CMOS microcontrollers with 8KB Flash sheet internal program storer from the control unit, is connected with the human-computer interaction interface that comprises keyboard, display, real time clock circuit and output control circuit respectively.Can improve the reliability of system as the subcontrol of system from the control unit.
Described external communication interface is at least a in RS232 interface, RS485 interface, GPRS interface, WIFI interface and the Ethernet interface.
Described human-computer interaction interface is the human-computer interaction interface that comprises keyboard, display screen.
Keyboard in the described human-computer interaction interface is 4 * 4 keyboards.
The output signal of described output control circuit comprises locking control signal, alerting signal, based on the data-signal of Wiegand26 agreement.The Wiegand26 agreement is by the U.S. industrial safety council
The standard agreement about access control that is subordinate to the formulation of the sub-council of organization access control criterion of (Security Industry Association is abbreviated as SIA).
Described lock control and warning device adopt electric lock and the hummer of 5A.
Described real time clock circuit adopts built-in crystal oscillator and has standard I
2The real-time timepiece chip of C interface.
False proof fingerprint identification method technical matters of the present invention is solved by the following technical programs.
This false proof fingerprint identification method adopts false proof fingerprint identification device, and following steps are arranged successively:
1) initialization;
2) circuit self check
If fault is arranged, show the content of fault, if non-fault enters next step;
3) the information and executing corresponding program of importing according to the user
Button is scanned at display routine master interface simultaneously, if the user pushes button, according to the information and executing corresponding program of user's input;
4) judge whether to carry out communication
If carry out communication, entry communication program then; If do not carry out communication, enter next step;
5) gather fingerprint image
The user selects newly-built custom menu, select user type, the input user related information, by registration fingerprint menu, the user restrains a finger on the collection face of false proof fingerprint capturer, CSD induction chip in the induction control module provides the capacitance sensing function that adopts switched capacitor technique, to be corresponding digital code by its current conversion by wherein delta-sigma modulator, and whether carry out fingerprint of biological living body greater than default digital code threshold value by the digital code of recording increment sigma modulator conversion and judge;
The digital code of delta-sigma modulator conversion is the initial code of presetting, and is judged as not point to restrain fingerprint capturer;
The digital code of delta-sigma modulator conversion is judged as pseudo-finger and restrains fingerprint capturer less than default digital code threshold value;
The digital code of delta-sigma modulator conversion is greater than default digital code threshold value, be judged as true finger and restrain fingerprint capturer, carry out image acquisition by image acquisition units, the user connects by carrying out image acquisition, when the fingerprint collecting sign all shows green, gather successfully; Press the OK key if the user need continue to register fingerprint, otherwise withdraw from preservation by esc key, continue the registered user with circulation aforesaid operations process;
6) registered user compares
The user restrains fingerprint capturer with registered finger, the electro-conductive glass sheet has been sensed true finger and has been restrained, image acquisition units is carried out image acquisition, if the verification passes, the user compares success, the fingerprint image of user related information and collection will be realized the target of user's operation synchronously in the position display of LCD correspondence.
False proof fingerprint identification method technical matters of the present invention is solved by following further technical scheme.
Preferably, described user restrains a finger at false proof fingerprint capturer and connects by carrying out image acquisition, is that the forefinger with the people connects by carrying out image acquisition at fingerprint capturer.
Preferably, described user connects a finger by carrying out image acquisition at false proof fingerprint capturer, is to connect to carry out image acquisition by three times.
The beneficial effect that the present invention is compared with the prior art is:
The present invention adopts the capacitance touch induction technology to survey living body finger print, cost is low, need not special sensor, touch and get final product output signal, also needn't adopt any distortion correction optical element, can reduce manufacturing cost, realize miniaturization, and the distortion relation that the fingerprint image of gathering and actual fingerprint image are compared and belonged to linear, can be correcting distorted by corresponding fingerprint image process software, have gather that optical imagery picture quality is good, fingerprint recognition reliability height, low, the anti-advantage that false fingerprint is effective, simple in structure and power consumption is lower of misclassification rate.
Description of drawings
Fig. 1 is the composition block scheme of the specific embodiment of the invention one;
Fig. 2 is that the circuit of the false proof fingerprint capturer among Fig. 1 is formed block scheme;
Fig. 3 is that the structure of the false proof fingerprint capturer among Fig. 1 is formed block scheme;
Fig. 4 is the Dove prism of the false proof fingerprint capturer among Fig. 1 and the structural representation of induction electro-conductive glass sheet, conductive film;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the front view of Fig. 4;
Fig. 7 is the cut-open view of the induction electro-conductive glass sheet among Fig. 4;
Fig. 8 is that induction control module among Fig. 1 is based on the electrical connection graph of the capacitance touch induction technology of CSD;
Fig. 9 is the induction control module working state schematic representation among Fig. 8;
Figure 10 is that increment summation comparer is sensed inside and outside circuit composition diagram based on CSD;
Figure 11 is the partial circuit composition diagram of touch sensible electric capacity and feedback element.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention will be described.
Embodiment one
A kind of as shown in the figure 1～9 shown in false proof fingerprint identification device, comprise fingerprint capturer, fingerprint capturer comprises housing 23, image acquisition units 10, finger sensing unit 9, induction control module 11, back light unit 8, and data communication interface 18.Finger sensing unit 9 comprises conductive film 16 and the induction electro-conductive glass sheet 15 of regular rectangular parallelepiped, conductive film 16 is connected with induction control module 11, induction electro-conductive glass sheet 15 is connected with Dove prism 21, adopt UV glue will respond to electro-conductive glass sheet 15 and fit with the image acquisition face of Dove prism 21, the transparency electrode conductive layer of induction electro-conductive glass sheet 15 and an end on conductive film 16 long limits connect to form the touch sensible capacitor C
Sensor
Back light unit 8 comprises for to by the led light source 22 of the finger gathered illumination, Dove prism 21, the lens combination 20 on same horizontal line with Dove prism 21 and image acquisition units 10 respectively, finishes independently that user fingerprints is registered, the user fingerprints collection.
The digital code of delta-sigma modulator conversion is the initial code of presetting 0, is judged as not point to restrain fingerprint capturer, the appearance value C of corresponding touch sensible electric capacity
SensorThe basic maintenance, change small appearance value, and the magnitude of voltage of touch sensible electric capacity remains on modulating capacitor voltage V
CmodNear;
The digital code of delta-sigma modulator conversion is judged as pseudo-finger and restrains fingerprint capturer, corresponding touch sensible capacitor C less than default digital code threshold value 72
SensorThe appearance value increase modulating capacitor voltage V
CmodAlso increase modulating capacitor voltage V
CmodWith reference voltage V
RefCompare its difference V
ModLess than preset threshold value, described CSD induction chip sends to described control module by the I/O port and does not gather the instruction of fingerprint signal, or passes through I
2The C communication interface is not gathered the fingerprint signal instruction to the register transmission of the color cmos chip of image acquisition units;
The digital code of delta-sigma modulator conversion is judged as true finger and restrains fingerprint capturer, corresponding touch sensible capacitor C greater than default digital code threshold value 72
SensorThe appearance value increase modulating capacitor voltage V
CmodAlso increase modulating capacitor voltage V
CmodWith reference voltage V
RefCompare its difference V
ModGreater than preset threshold value, described CSD induction chip sends the instruction of gathering fingerprint signal by the I/O port to described control module, or passes through I
2The C communication interface sends the instruction of collection fingerprint signal to the register of the color cmos chip of image acquisition units, and fingerprint signal enters the color cmos chip of image acquisition units through light path, and passes through I
2C interface arranges the register of color cmos chip, comprises the setting to information such as acquisition window size, acquisition window starting point, time shutter, gains.The control image acquisition units is worked immediately.
Lens combination 20 comprises upper strata lens and lower floor's lens, distance between upper strata lens and the lower floor's lens is adjustable, the color cmos chip 32 of image acquisition units 10 is arranged on the image planes of lens combination 20, image in the light of collection information in fingerprint is presented on color cmos chip 32 photosensitive arrays, and convert electric signal to, carry out communication by data Communication Interface 18 and external control unit 2.
Back light unit 8 also comprises diffusion sheet 14, and diffusion sheet 14 is attached at the small end face 25 of Dove prism 21, and small end face 25 is the faces of injecting of led light source 22.The light of led light source disperses by diffusion sheet and is radiated at equably on the image acquisition face of Dove prism, to the finger illumination of being gathered, neither dazzling, can avoid information in fingerprint fully not identified conversion by imageing sensor again, thereby improve degree of accuracy and the sharpness of fingerprint collecting, significantly improve acquisition quality and recognition efficiency.
Induction electro-conductive glass sheet 15 is connected with trapezoidal 21 prisms, adopts UV glue will respond to electro-conductive glass sheet 15 and fits with the image acquisition face of Dove prism 21.UV glue does not contain volatile solvent, and no stink is non-stimulated, and good leveling property is not gambled net, and water tolerance is strong, and anti-solvent scouring.
Induction electro-conductive glass sheet 15 comprises at least one transparent insulating layer and at least one transparency electrode conductive layer, and transparent insulating layer is arranged on the transparency electrode conductive layer, and the transparency electrode conductive layer is made up of at least one electrode.When having only a transparency electrode conductive layer, only be provided with a transparent insulating layer, and the transparency electrode conductive layer is arranged on the plane of described transparent insulating layer.
Transparent insulating layer is glass substrate 23, restrains the workplace of gathering image as finger, is used for surveying the capacitance variations that true finger touches.
The transparency electrode conductive layer is ITO 24, as the workplace of capacitance touch induction, is used for surveying the capacitance variations of true finger touch and corresponding electric signal is transferred to external circuit.
Led light source 22 is arranged on 25 tops of Dove prism 21 small end faces, and the led light source plate is connected with the fingerprint capturer mainboard by lead, to LED power supply and altogether.Led light source 22 is the light emitting diode of two greens, is waiting for that green LED is controlled under low-power consumption under the acquisition state, to prolong the serviceable life of collector.
Diffusion sheet 14 is PE films, and adopting model is MB-433P bottom diffusion barrier, has the effect of disperse light, even soft light.
This embodiment also comprises control module 2, external communication interface 3, human-computer interaction interface 4, pilot lamp, real time clock circuit 7, lock control and warning device 6 and output control circuit 5, real time clock circuit 7 is connected with control module 2, and lock control is connected with output control circuit 5 with warning device 6.
Control module 2 adopts the master-slave mode based on dual-CPU architecture, comprises main control unit 12 and connected from control unit 13.When main control unit 12 breaks down cisco unity malfunction, still can control fingerprint verifying apparatus from control unit 13 and carry out necessary work, to improve system reliability.
Main control unit 12 is CPU of 32 Embedded RISC chip cores of ARM company design, and predominant frequency 624MHz, main control unit 12 are connected with fingerprint capturer 1, external communication interface 3 respectively.Main control unit 12 is by reading user's keyboard operation data, real-time clock data and transmitting the information that will show from control unit 13.
From the control unit 13 are 8 CMOS microcontroller AT89S52 with 8KB Flash sheet internal program storer, be connected with the human-computer interaction interface 4 that comprises keyboard, display, real time clock circuit 7 and output control circuit 8 respectively from control unit 13, output control circuit 8 is connected with warning device 6 with lock control.Can improve the reliability of system as the subcontrol of system from control unit 13.
External communication interface 3 is at least a in RS232 interface, RS485 interface, GPRS interface, WIFI interface and the Ethernet interface.
Human-computer interaction interface 4 comprises keyboard, display, and keyboard is 4 * 4 keyboards.
The output signal of output control circuit 5 comprises locking control signal, alerting signal, based on the data-signal of Wiegand26 agreement.The Wiegand26 agreement is the standard agreement about access control that the sub-council of organization access control criterion formulates that is subordinate to by the U.S. industrial safety council (Security Industry Association is abbreviated as SIA).
Lock control and warning device 6 adopt electric lock and the hummer of 5A.
The real-time timepiece chip ZT-C08803A that real time clock circuit 7 adopts Shenzhen Xing Weifan Electron Technology Co., Ltd to produce, its built-in crystal oscillator has standard I
2C interface.
The false proof fingerprint identification method of this embodiment adopts false proof fingerprint identification device, and following steps are arranged successively:
1) initialization;
2) circuit self check
If fault is arranged, show the content of fault, if non-fault enters next step;
3) the information and executing corresponding program of importing according to the user
Button is scanned at display routine master interface simultaneously, if the user pushes button, according to the information and executing corresponding program of user's input;
4) judge whether to carry out communication
If carry out communication, entry communication program then; If do not carry out communication, enter next step;
5) gather fingerprint image
The user selects newly-built custom menu, select user type, the input user related information, by registration fingerprint menu, the user restrains a finger on the collection face of false proof fingerprint capturer, CSD induction chip in the induction control module provides the capacitance sensing function that adopts switched capacitor technique, to be corresponding digital code by its current conversion by wherein delta-sigma modulator, and whether carry out fingerprint of biological living body greater than default digital code threshold value by the digital code of recording increment sigma modulator conversion and judge;
The digital code of delta-sigma modulator conversion is the initial code of presetting 0, is judged as not point to restrain fingerprint capturer;
The digital code of delta-sigma modulator conversion is judged as pseudo-finger and restrains fingerprint capturer less than default digital code threshold value 72;
The digital code of delta-sigma modulator conversion is greater than default digital code threshold value 72, be judged as true finger and restrain fingerprint capturer, carry out image acquisition by image acquisition units, the user connects by carrying out image acquisition, when the fingerprint collecting sign all shows green, gather successfully; Press the OK key if the user need continue to register fingerprint, otherwise withdraw from preservation by esc key, continue the registered user with circulation aforesaid operations process;
6) registered user compares
The user restrains fingerprint capturer with registered finger, the electro-conductive glass sheet has been sensed true finger and has been restrained, image acquisition units is carried out image acquisition, if the verification passes, the user compares success, the fingerprint image of user related information and collection will come out in the position display of LCD correspondence synchronously, realizes the target of user's operation.
Embodiment two
Another kind of false proof fingerprint identification device, composition is basic identical with embodiment one, and difference is: finger sensing unit 9 does not comprise induction electro-conductive glass sheet 15.The one side of conductive film 16 adopts plating indium technology to be attached at the end on the upper side that Dove prism 21 surface-coated are useful on pitch-dark layer upper side of shading, forms the touch sensible capacitor C with Dove prism 21
SensorDo not adopt induction electro-conductive glass sheet, can improve induction efficiency, save manufacturing cost.
The false proof fingerprint identification method of embodiment two is identical with embodiment one.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention does, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; make without departing from the inventive concept of the premise as dried fruit and be equal to alternative or obvious modification; and performance or purposes are identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of submitting to.
Claims (10)
1. false proof fingerprint identification device, comprise fingerprint capturer, fingerprint capturer comprises housing, image acquisition units, finger sensing unit, induction control module, back light unit, described finger sensing unit comprises conductive film, described conductive film is connected with described induction control module, described back light unit comprises LED light source, Dove prism, the lens combination on same horizontal line with described Dove prism and described image acquisition units respectively, be used for independently finishing user fingerprints registration, user fingerprints collection, it is characterized in that:
Described induction control module comprises the CSD induction chip that adopts delta-sigma modulator, voltage conversion unit, storage unit and the data communication interface that is connected with described CSD induction chip respectively, described voltage conversion unit also is connected with described image acquisition units, storage unit respectively, described storage unit also is connected with described image acquisition units respectively with described data communication interface, and it is an I/O port that connects the CSD induction chip of described induction control module by lead that described conductive film is connected with described induction control module;
Described CSD induction chip provides the capacitance sensing function that adopts switched capacitor technique, to be corresponding digital code by its current conversion by wherein delta-sigma modulator, and whether carry out fingerprint of biological living body greater than default digital code threshold value by the digital code of recording increment sigma modulator conversion and judge:
The digital code of delta-sigma modulator conversion is the initial code of presetting, and is judged as not point to restrain fingerprint capturer;
The digital code of delta-sigma modulator conversion is judged as pseudo-finger and restrains fingerprint capturer less than default digital code threshold value;
The digital code of delta-sigma modulator conversion is judged as true finger and restrains fingerprint capturer greater than default digital code threshold value.
2. false proof fingerprint identification device as claimed in claim 1 is characterized in that:
Described Dove prism is that the base, longitudinal section is greater than high six prisms symmetrically, include be parallel to each other over against large end face, small end face, downside and its excess-three side, described large end face is the image acquisition face, described small end face is that light source is injected face, described downside is the imaging surface relative with image-forming objective lens, and the surface of its excess-three side is coated with the pitch-dark layer for shading;
Described lens combination comprises upper strata lens and lower floor's lens, distance between upper strata lens and the lower floor's lens is adjustable, the photoelectric sensor of described image acquisition units is arranged on the image planes of lens combination, image in the light of collection information in fingerprint is presented on the image acquisition units photosensitive array, and convert electric signal to, carry out communication by internal communication interface and control module.
3. false proof fingerprint identification device as claimed in claim 2 is characterized in that:
Described conductive film is the rectangular parallelepiped of rule, and the one side of described conductive film adopts plating indium technology to be attached at the end on the upper side that described Dove prism surface-coated is useful on pitch-dark layer upper side of shading, forms touch sensible electric capacity with described Dove prism.
4. false proof fingerprint identification device as claimed in claim 3 is characterized in that:
Described finger sensing unit also comprises induction electro-conductive glass sheet, described induction electro-conductive glass sheet is connected with described Dove prism, employing is solidified under ultraviolet light UV irradiation or the UV glue of sclerosis is fitted the image acquisition face of described induction electro-conductive glass sheet and described Dove prism, and an end on the long limit of the transparency electrode conductive layer of described induction electro-conductive glass sheet and the conductive film of regular rectangular parallelepiped connects to form touch sensible electric capacity.
5. false proof fingerprint identification device as claimed in claim 4 is characterized in that:
Described induction electro-conductive glass sheet comprises at least one transparent insulating layer and at least one transparency electrode conductive layer, and transparent insulating layer is arranged on the transparency electrode conductive layer, and the transparency electrode conductive layer is made up of at least one electrode.
6. as claim 4 or 5 described false proof fingerprint identification devices, it is characterized in that:
Described back light unit also comprises diffusion sheet, described diffusion sheet is attached at the led light source of described Dove prism and injects face, be the small end face of described Dove prism, the light of led light source disperses by diffusion sheet and is radiated at equably on the image acquisition face of Dove prism, to the finger illumination of being gathered.
7. false proof fingerprint identification device as claimed in claim 5 is characterized in that:
Described transparent insulating layer is glass substrate;
Described transparency electrode conductive layer is tin indium oxide ITO.
8. false proof fingerprint identification device as claimed in claim 7 is characterized in that:
The described storage unit of described image acquisition units, described induction control module and described data communication interface are arranged on the fingerprint capturer mainboard, and described image acquisition units and described induction control module pass through I separately
2The C PORT COM connects the I of inner separately EEROM
2The C PORT COM is carried out the parameter setting to the EEROM register of described image acquisition units and described induction control module self;
Described image acquisition units comprises the color cmos chip, and the crystal oscillator and the reset circuit that are connected with described color cmos chip respectively.
9. false proof fingerprint identification device as claimed in claim 6 is characterized in that:
Also comprise control module, external communication interface, human-computer interaction interface, pilot lamp, real time clock circuit, lock control and warning device, and output control circuit, described real time clock circuit is connected with control module, and described lock control is connected with described output control circuit with warning device;
Described control module adopts the master-slave mode based on dual-CPU architecture, comprises main control unit and connected from the control unit;
Described main control unit is the CPU of 32 Embedded RISC chip cores of ARM company design, is connected with fingerprint capturer, external communication interface respectively;
Described is 8 CMOS microcontrollers with 8KB Flash sheet internal program storer from the control unit, is connected with the human-computer interaction interface that comprises keyboard, display, real time clock circuit and output control circuit respectively.
10. false proof fingerprint identification method is characterized in that:
Adopt false proof fingerprint identification device, following steps arranged successively:
1) initialization;
2) circuit self check
If fault is arranged, show the content of fault, if non-fault enters next step;
3) the information and executing corresponding program of importing according to the user
Button is scanned at display routine master interface simultaneously, if the user pushes button, according to the information and executing corresponding program of user's input;
4) judge whether to carry out communication
If carry out communication, entry communication program then; If do not carry out communication, enter next step;
5) gather fingerprint image
The user selects newly-built custom menu, select user type, the input user related information, by registration fingerprint menu, the user restrains a finger on the collection face of false proof fingerprint capturer, CSD induction chip in the induction control module provides the capacitance sensing function that adopts switched capacitor technique, to be corresponding digital code by its current conversion by wherein delta-sigma modulator, and whether carry out fingerprint of biological living body greater than default digital code threshold value by the digital code of recording increment sigma modulator conversion and judge;
The digital code of delta-sigma modulator conversion is the initial code of presetting, and is judged as not point to restrain fingerprint capturer;
The digital code of delta-sigma modulator conversion is judged as pseudo-finger and restrains fingerprint capturer less than default digital code threshold value;
The digital code of delta-sigma modulator conversion is greater than default digital code threshold value, be judged as true finger and restrain fingerprint capturer, carry out image acquisition by image acquisition units, the user connects by carrying out image acquisition, when the fingerprint collecting sign all shows green, gather successfully; Press the OK key if the user need continue to register fingerprint, otherwise withdraw from preservation by esc key, continue the registered user with circulation aforesaid operations process;
6) registered user compares
The user restrains fingerprint capturer with registered finger, the electro-conductive glass sheet has been sensed true finger and has been restrained, image acquisition units is carried out image acquisition, if the verification passes, the user compares success, the fingerprint image of user related information and collection will be realized the target of user's operation synchronously in the position display of LCD correspondence.
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Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496014B (en) * | 2011-12-06 | 2014-04-02 | 长春方圆光电技术有限责任公司 | Optical fingerprint acquisition system for living body finger identification |
| CN103577800A (en) * | 2012-07-23 | 2014-02-12 | 中国航天员科研训练中心 | Method for measuring human hand morphological parameters based on color images |
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| CN104657715A (en) * | 2015-02-10 | 2015-05-27 | 柳州市金旭节能科技有限公司 | Fingerprint detector |
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| CN104700074A (en) * | 2015-02-10 | 2015-06-10 | 广东光阵光电科技有限公司 | Method and device for quickly recognizing fingerprint module |
| CN104700073A (en) * | 2015-02-10 | 2015-06-10 | 广东光阵光电科技有限公司 | Method and device for identifying planar fingerprints |
| CN105046192A (en) * | 2015-05-21 | 2015-11-11 | 广东光阵光电科技有限公司 | Recognition control method and device for fingerprint recognition module |
| CN104933404A (en) * | 2015-05-21 | 2015-09-23 | 广东光阵光电科技有限公司 | High-precision fingerprint identification recognition method and device thereof |
| CN105303177B (en) * | 2015-10-21 | 2019-02-01 | Oppo广东移动通信有限公司 | A kind of camera with fingerprint identification function and corresponding terminal |
| CN107251046B (en) * | 2015-10-23 | 2021-02-12 | 深圳市汇顶科技股份有限公司 | Optical fingerprint sensor and package |
| CN105469030B (en) * | 2015-11-11 | 2020-06-19 | 西安易朴通讯技术有限公司 | Electronic equipment with fingerprint identification function |
| CN106022270B (en) * | 2016-03-31 | 2019-08-20 | 深圳市奔凯安全技术股份有限公司 | A kind of fingerprint detection circuit and device |
| CN106650582A (en) * | 2016-09-27 | 2017-05-10 | 宇龙计算机通信科技(深圳)有限公司 | Fingerprint identification method, camera with fingerprint identification function and terminal |
| DE102016119846A1 (en) * | 2016-10-18 | 2018-04-19 | Preh Gmbh | Man-machine interface comprising a steering wheel and a fingerprint sensor attached thereto |
| CN107958174A (en) * | 2016-11-01 | 2018-04-24 | 深圳信炜科技有限公司 | Bio-identification module and mobile terminal |
| WO2018098779A1 (en) | 2016-12-01 | 2018-06-07 | 深圳市汇顶科技股份有限公司 | Capacitive sensing system and related voltage correction method therefor |
| WO2018137167A1 (en) | 2017-01-24 | 2018-08-02 | 深圳市汇顶科技股份有限公司 | Fingerprint recognition system and electronic device |
| CN109145682B (en) * | 2017-06-16 | 2022-02-22 | 固安翌光科技有限公司 | Optical fingerprint identification device and preparation method thereof |
| CN109196525B (en) * | 2017-07-18 | 2020-12-22 | 深圳市汇顶科技股份有限公司 | Anti-spoof sensing to reject false fingerprint patterns in an off-screen optical sensor module for on-screen fingerprint sensing |
| CN108256415A (en) * | 2017-11-30 | 2018-07-06 | 北京集创北方科技股份有限公司 | Fingerprint identification method, device and system, electronic equipment |
| TWI666590B (en) * | 2018-04-10 | 2019-07-21 | 友達光電股份有限公司 | Fingerprint sensing panel and fingerprint sensor thereof |
| CN108496184B (en) * | 2018-04-17 | 2022-06-21 | 深圳市汇顶科技股份有限公司 | Image processing method and device and electronic equipment |
| CN109901754B (en) * | 2019-02-20 | 2021-04-13 | Oppo广东移动通信有限公司 | Data self-calibration method and related device |
| CN111357010B (en) * | 2019-06-28 | 2023-09-22 | 深圳市汇顶科技股份有限公司 | Enhancement film for an off-screen optical fingerprint sensor |
| US20200409191A1 (en) * | 2019-06-28 | 2020-12-31 | Shenzhen GOODIX Technology Co., Ltd. | Enhancement film for under-screen optical fingerprint sensor |
| CN110795718A (en) * | 2019-10-30 | 2020-02-14 | 维沃移动通信有限公司 | Fingerprint response method and electronic equipment |
| TWI767285B (en) * | 2019-11-29 | 2022-06-11 | 神盾股份有限公司 | Fingerprint identification device, electronic device for identificating fingerprint image and fingerprint identification method |
| KR20210080718A (en) | 2019-12-20 | 2021-07-01 | 삼성전자주식회사 | Semiconductor aarckage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070099426A (en) * | 2006-04-04 | 2007-10-09 | 신요식 | Apparatus and method for discriminating and recognizing living-body fingerprint and apparatus for discriminating living-body fingerprint thereof |
| CN101482921A (en) * | 2008-11-20 | 2009-07-15 | 陈家辉 | Fingerprint identification method |
| CN201438309U (en) * | 2009-06-23 | 2010-04-14 | 深圳市中控生物识别技术有限公司 | Fingerprint verification equipment with sensing and fingerprint-acquiring functions |
| CN201465142U (en) * | 2009-06-11 | 2010-05-12 | 成都方程式电子有限公司 | Induction type optical fingerprint collecting device |
-
2010
- 2010-11-17 CN CN 201010548200 patent/CN102004903B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070099426A (en) * | 2006-04-04 | 2007-10-09 | 신요식 | Apparatus and method for discriminating and recognizing living-body fingerprint and apparatus for discriminating living-body fingerprint thereof |
| CN101482921A (en) * | 2008-11-20 | 2009-07-15 | 陈家辉 | Fingerprint identification method |
| CN201465142U (en) * | 2009-06-11 | 2010-05-12 | 成都方程式电子有限公司 | Induction type optical fingerprint collecting device |
| CN201438309U (en) * | 2009-06-23 | 2010-04-14 | 深圳市中控生物识别技术有限公司 | Fingerprint verification equipment with sensing and fingerprint-acquiring functions |
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|---|---|
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