WO2021038615A1 - 血流認証装置 - Google Patents

血流認証装置 Download PDF

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Publication number
WO2021038615A1
WO2021038615A1 PCT/JP2019/032950 JP2019032950W WO2021038615A1 WO 2021038615 A1 WO2021038615 A1 WO 2021038615A1 JP 2019032950 W JP2019032950 W JP 2019032950W WO 2021038615 A1 WO2021038615 A1 WO 2021038615A1
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WO
WIPO (PCT)
Prior art keywords
finger
blood flow
light
authentication device
movable
Prior art date
Application number
PCT/JP2019/032950
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English (en)
French (fr)
Japanese (ja)
Inventor
幸三 須下
英夫 竹村
Original Assignee
バイオニクス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by バイオニクス株式会社 filed Critical バイオニクス株式会社
Priority to JP2021541753A priority Critical patent/JPWO2021038615A1/ja
Priority to PCT/JP2019/032950 priority patent/WO2021038615A1/ja
Publication of WO2021038615A1 publication Critical patent/WO2021038615A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing

Definitions

  • the present invention relates to a blood flow authentication device that performs personal authentication using the blood vessel patterns of veins and arteries obtained by imaging the light transmitted through the finger of the person to be authenticated.
  • blood flow authentication devices Conventionally, various blood flow authentication device technologies are known as blood flow authentication devices, but among them, blood vessels of hands and fingers are present inside the body, so that they are more difficult to forge or tamper with than fingerprint authentication, and are expensive. It is known as a security technology that can authenticate with accuracy.
  • a finger is inserted into an insertion hole provided in a housing, and the light emitted from the lighting device is emitted in the lateral direction of the finger and in a direction orthogonal to the optical axis of the imaging means. It is a device that irradiates from the body, images the blood vessel pattern inside the finger with an imaging device, and authenticates an individual using an authentication unit.
  • an object of the present invention is to provide a blood flow authentication device capable of reducing the reflection on the side surface of the finger and the scattering of light inside the finger and reducing the influence of light from the outside.
  • the blood flow authentication device disclosed in the present application includes a movable part, a support part, a light source, a pressure sensor, an imaging part, and the like.
  • the movable portion comes into contact with the inserted finger of the person to be authenticated and rotates by the movement of the finger.
  • the movable portion is axially attached to the support portion by a rotating shaft.
  • the support portion can be moved by the urging force of the urging means fixed to the other surface on the opposite side to the one surface located on the finger side.
  • the light source is installed inside the movable portion and irradiates the back side of the finger with light.
  • the pressure sensor is fixed to the side opposite to the support portion in the urging means.
  • the imaging unit captures the light emitted from the light source that has passed through the finger.
  • the movable portion has a light emitting portion and a contact portion.
  • the light emitting unit internally provides the light source.
  • the contact portion has one surface that comes into contact with the finger. The light emitting portion and the contact portion are connected to each other at a predetermined angle via the rotation shaft.
  • the blood flow authentication device disclosed in the present application is provided with a stopper.
  • the stopper is adjacent to the movable portion in the support portion and limits the rotation range of the movable portion.
  • the finger width information obtained from the pressure sensor is calculated from the average value of the values obtained from the left and right pressure sensors.
  • the blood flow authentication device disclosed in the present application includes a housing and a filter.
  • the imaging unit is installed internally, and the support unit is placed on the housing.
  • the filter is provided at a position facing the imaging unit in the housing.
  • the blood flow authentication device disclosed in the present application includes a storage unit and a control unit.
  • the blood flow shape information of the registrant is stored in the storage unit in correspondence with the finger width information obtained from the pressure sensor via the movable portion and the support.
  • the control unit collates the finger width information obtained from the pressure sensor and the blood flow image transmitted from the imaging unit with the finger width information and blood flow shape information of the registrant's finger stored in the storage unit. To do.
  • the reflection on the side surface of the finger and the scattering of light inside the finger can be reduced, and the influence of the light from the outside can be reduced, so that the contrast of the blood vessel image is improved and the person to be authenticated It is possible to improve the accuracy of the authentication of the blood flow image of the finger.
  • FIG. 5 is a plan view of the blood flow authentication device according to the present embodiment of the present invention in a state where a finger is not inserted into a movable portion.
  • FIG. 5 is a plan view of the blood flow authentication device according to the present embodiment of the present invention in a state where a finger is inserted into a movable portion.
  • FIG. 5 is a front view of the blood flow authentication device according to the present embodiment of the present invention in a state where a finger is not inserted into a movable portion. It is a front view of the state in which a finger is inserted into a movable part in the blood flow authentication device in this embodiment of the present invention.
  • It is a flowchart which shows the authentication procedure in the blood flow authentication apparatus in this embodiment of this invention. It is a conceptual diagram of the database stored in the storage part in the blood flow authentication apparatus in this embodiment of this invention.
  • the vertical direction in FIGS. 3 and 4 is that the upper side of the paper surface is the upward direction and the lower side of the paper surface is the downward direction.
  • the left side of the paper surface is the left direction and the right side of the paper surface is the right direction in FIGS. 3 and 4.
  • the front side of the paper surface is the front direction and the back side of the paper surface is the rear direction in FIGS. 3 and 4.
  • the blood flow authentication device of the present embodiment mainly includes a movable portion 1, a support portion 2, a light source 3, a pressure sensor 4, a stopper 5, an imaging unit 6, a housing 7, and a filter 8. , A storage unit 9, a control unit 10, and the like.
  • the movable portion 1 is a member that comes into contact with the inserted finger F of the person to be authenticated and rotates with the movement of the finger as the finger F is inserted or removed.
  • the movable portion 1 has an elongated shape along the front-rear direction, which is the longitudinal direction of the finger F to be inserted, and has a substantially V-shaped cross section in the vertical direction.
  • the movable portion 1 has a contact portion 11 having one surface that contacts the finger F and a light emitting portion 12 in which the light source 3 is provided. One end of the contact portion 11 and one end of the light emitting portion 12 are continuously provided at a predetermined angle via the rotation shaft 13.
  • the movable portion 1 has a substantially V-shaped cross section in the present embodiment, but in other embodiments, the movable portion 1 may have a curved shape such as a bow shape or an arc shape as well as a bent shape. Of course, a plurality of bends or a combination of the bend shape and the curve may be used.
  • the abutting portion 11 is connected to the inner side surface 111, which is one surface to which the inserted finger F abuts, the outer surface 112 located on the opposite side of the inner side surface 111, and the inner side surface 111, and the inserted finger F is inserted. It has an inclined surface 113 that is inclined from the outer surface 112 side to the inner surface 111 side in the finger pad direction.
  • the contact portion 11 has a flat plate shape elongated in the front-rear direction.
  • the light emitting unit 12 internally provides a light source 3 that irradiates the inserted finger F with light on the inner side surface 121 side.
  • the light emitting portion 12 has a flat plate shape elongated in the front-rear direction. When the finger F is inserted in the vertical direction, the contact portions 11 and 11 are pushed downward by the finger F, and the light emitting portions 12 and 12 are rotated toward the finger side so as to cover the finger F from above around the rotation axis 13. It moves and irradiates the finger F with light from diagonally above.
  • halation is less likely to occur as compared with the case where light is irradiated from both side surfaces of the finger F, so that the scattering of light inside the finger is alleviated and the contrast of the blood vessel image can be improved.
  • the influence of reflection on the side surface of the finger is alleviated, the blood flow image of the finger F of the person to be authenticated can be correctly taken, and the accuracy of authentication can be improved.
  • the rotating shaft 13 is a member that pivotally attaches the movable portion 1 to the support portion 2.
  • the rotating shaft 13 penetrates the movable portion 1 in the front-rear direction in the vicinity where one end of the contact portion 11 and one end of the light emitting portion 12 are connected to each other, and extends to both ends of the movable portion 1 in the longitudinal direction.
  • the support portion 2 to be axially attached is loosely fitted, and the movable portion 1 is axially attached to the support portion 2.
  • a winding spring 14 is engaged with the peripheral edge of the rotating shaft 13 that is axially attached to the support portion 2.
  • the winding spring 14 is provided so as to urge the contact portion 11 upward and the light emitting portion 12 in the left-right direction.
  • the light emitting portion 12 of the movable portion 1 rotates so as to cover the finger F.
  • the movable portion 1 is in a state before the finger F is inserted by the urging force of the winding spring 14 (a state in which the light emitting portion 12 is erected upward from the rotating shaft 13). ) To return.
  • the movable portion 1 is pivotally attached to the vicinity of the upper end portion of the support portion 2 composed of a pair of support housings via a rotating shaft 13 and is sandwiched by the support portions 2. Then, the movable portion 1 axially attached to the support portion 2 is predetermined with the finger F of the authenticated person to be inserted as the center (so as to sandwich the finger F of the authenticated person to be inserted from both side surfaces of the finger). They are arranged in pairs on the left and right at intervals of. Specifically, as shown in FIGS. 3 and 4, the movable portions 1 and 1 are arranged so as to face each other in the parallel direction along the inserted finger F.
  • the light emitting parts 12 and 12 are positioned above the rotation axis 13 (the light emitting parts 12 and 12 are in the vertical direction). It is provided so that it is located parallel to each other).
  • the contact portion 11 is formed obliquely downward toward the finger F inserted from the rotation shaft 13 so that the ventral side of the finger F abuts on the contact portions 11 and 11. Then, when the finger F is inserted, the finger F comes into contact with the inner side surfaces 111 and 111 of the contact portions 11 and 11.
  • the finger F first abuts on the contact portions 11 and 11, and when the finger F is pushed down, the contact portion 11 and 11 are pushed down together with the finger F, and the light emitting portions 12 and 12 are pushed down from above the finger F. It rotates toward the finger so as to cover the finger F, and the inclined surfaces 113 and 113 of the contact portions 11 and 11 come into contact with the housing 7.
  • the inclined surfaces 113 and 113 of the contact portions 11 and 11 are formed so as to be in close contact with the upper end surface 71 of the housing 7 when the contact portions 11 and 11 are pushed down.
  • the movable portion 1 has an opening above the pair of movable portions 1.1, it is easy to visually guide the place where the person to be authenticated inserts the finger F.
  • the tilt angle of the contact portion 11 with respect to the light emitting portion 12 can be set to an arbitrary angle as long as the finger F of the person to be authenticated can be easily applied and the movable portion 1 rotates smoothly. As a result, the position of the finger F can be prevented from shifting, and the blood flow image of the finger F of the person to be authenticated can be correctly captured to improve the accuracy of authentication.
  • the light emitting parts 12 and 12 of the movable parts 1.1 rotate toward the finger side so as to cover the finger F, and the light sources 3 and 3 approach the back side of the finger F. Therefore, the light can be irradiated from diagonally above the finger F. Therefore, the internal scattering of light inside the finger is alleviated and the contrast of the blood vessel image is improved. Further, since the upper part of the finger F is partially covered by the light emitting portions 12 and 12, the influence of the near infrared light from the outside can be reduced. Further, since the light is emitted from diagonally above the finger F, the influence of the reflection on the side surface of the finger is alleviated and the authentication accuracy is improved.
  • the light emitting unit 12 of the movable unit 1 includes a light source 3 and a substrate 31.
  • the light source 3 is internally installed on the inner side surface 121 side, which is the finger side of the light emitting unit 12, and is a member that irradiates light from diagonally above toward the finger F sandwiched between the opposing movable portions 1.1.
  • the inner side surface 121 has a translucent property in which the light emitted from the light source 3 passes through the finger F.
  • the light source 3 has an element such as a chip-type LED that irradiates near infrared rays or infrared rays having a wavelength of about 700 nm or more.
  • one light source 3 is arranged inside the movable portion 1, but in other embodiments, several light sources 3 may be arranged, such as two each.
  • the substrate 31 is a member that is connected to the light source 3 and supplies electric power to the light source 3.
  • the substrate 31 is internally provided in the light emitting unit 12 like the light source 3. Further, the substrate 31 can receive electric power from an external power source (not shown) by wiring and supply the electric power to the light source 3, or can supply electric power to the light source 3 by a built-in battery.
  • the support portion 2 is composed of a pair of substantially rectangular support housings.
  • the movable portion 1 is axially attached to the support portion 2 by the rotating shaft 13 and supported by the urging force of the urging means S fixed to the outer surface 22 which is the surface opposite to the inner surface 21 which abuts the finger F.
  • Part 2 is movable. That is, the support portion 2 is a member that obtains finger width information in conjunction with the movement of the movable portion 1.
  • the movable portion 1.1 rotates toward the finger side and is supported according to the finger width of the inserted finger F with the movement of the movable portion 1.
  • the portions 2 and 2 move in a direction away from the finger F, and both side surfaces of the finger F are supported by the inner side surfaces 21 and 21 of the support portions 2.2.
  • the load applied to the pressure sensor 4 via the urging means S changes depending on the distance at which the support portions 2 and 2 are separated according to the finger width of the inserted finger F. Therefore, the finger of the finger F changes according to the load. Width information can be obtained.
  • the support portions 2 and 2 approach each other by the urging force of the urging means S, and the state before the finger F is inserted (the pair of light emitting portions 12 and 12 are in a state of each other). (Position state facing in parallel), returns to.
  • the support portion 2 is provided with a rotatable portion 24 on the lower end surface 23. Since the rotating portion 24 has a spherical shape and rotates according to the urging force of the urging means S, the supporting portions 2 and 2 can be easily moved. Therefore, by the smooth movement of the support portion 2 inside the housing 7, the blood flow image of the finger F of the person to be authenticated can be correctly taken, and the accuracy of personal authentication can be improved.
  • the movable portion 1 and the support portion 2 to which the movable portion 1 is axially attached are exposed in FIGS. 1 to 4 for easy understanding, but in an actual product, they are shown by virtual lines covering the whole. It may be protected by a cover member.
  • the pressure sensor 4 has the urging means S fixedly provided on the support portion 2 on the side opposite to the side into which the finger F is inserted.
  • the pressure sensors 4 are also installed facing each other in pairs on the left and right, as well as the movable portions 1 and the supporting portions 2 which are installed facing each other at predetermined intervals so as to sandwich the finger F of the person to be authenticated to be inserted.
  • the pressure sensor 4 measures the pressure applied by the contained pressure-sensitive element, converts it into an electric signal, and outputs it. In the present embodiment, information on the thickness of the finger F of the person to be authenticated is obtained according to the electric signal output by the pressure sensor 4.
  • the information regarding the thickness of the finger F of the person to be authenticated corresponds to the average value of the electric signals of the left and right pressure sensors in order to reduce the error at the time of inserting the finger F.
  • the pressure sensor 4 is provided at the end of the urging means S, and when the finger F is inserted between the movable portions 1.1 facing the person to be authenticated, the contact portions 11 and 11 are brought into contact with each other. By being pushed down by the finger F, the movable parts 1.1 rotate so as to cover the finger F. Then, the support portions 2 and 2 move in the direction away from each other, the urging means S / S are compressed, and the load increases.
  • the support portion 2 does not move much, so that the load on the pressure sensor 4 does not increase so much.
  • the finger F of the person to be authenticated is thick, it is related to the pressure sensor 4.
  • the load increases significantly. Therefore, the condition of the load related to the pressure sensor 4 changes according to the thickness of the finger F of the person to be authenticated, and the strength of the electric signal converted accordingly also changes.
  • the amount of light emitted from the light source 3 can be adjusted by using the electric signals output at different values according to the thickness of the finger F of the person to be authenticated. Information on the thickness of the finger F can be used for personal authentication.
  • the urging means S is composed of a member that expands and contracts in a ring shape such as a coil spring. Since the urging means S is arranged in a direction orthogonal to the direction in which the finger F is inserted, for example, when the finger F is inserted, the support portions 2 and 2 interlocked with the movable portions 1 and 1 are separated from each other. A force that urges the direction works.
  • the spirally wound coil spring is used as the urging means S, but in other embodiments, the leaf spring is as long as the urging force acts on the support portion 2 from the pressure sensor 4 side. , Takenoko springs, air springs that utilize the elastic force of compressed air, and other elastic members can be used.
  • the stopper 5 is a member having a cubic or rectangular parallelepiped shape, adjacent to the movable portion 1, and limiting the rotation range of the movable portion 1. As shown in FIGS. 3 and 4, the stopper 5 is fixed adjacent to the movable portion 1 at the upper end portion of the support portion 2 that sandwiches the movable portion 1. Specifically, one surface of the stopper 5 is provided on the lower portion (near the rotation shaft 13) of the outer surface 122 of the light emitting portion 12. Therefore, when the finger F is taken out from the movable portion 1, the movable portion 1 rotates in the direction opposite to the direction pushed down by the finger F due to the urging force of the winding spring 14, but the stopper 5 is the movable portion 1.
  • the stopper 5 is fixed to both support housings of the support portion 2, but in other embodiments, the stopper 5 may be fixed to only one support housing of the support portion 2. Further, the stopper 5 may have another shape such as a sphere as long as the rotation range of the movable portion 1 can be limited.
  • the imaging unit 6 is a member that captures a blood flow image obtained by passing through the finger F and the filter 8 among the light emitted from the light source 3.
  • a photoelectric conversion element such as a CCD or CMOS is used in the imaging unit 6, and the captured blood flow image of the finger F is transmitted to the control unit 10 or the like as an electric signal.
  • the imaging unit 6 is installed inside the housing 7 and directly below the filter 8.
  • the filter 8 is provided above the image pickup unit 6 in the housing 7.
  • the width of the filter 8 in the left-right direction is narrower than the width of the finger F.
  • the filter 8 shields visible light and transmits the light emitted from the light source 3. That is, when the finger F is inserted, the inclined surface 113 of the contact portion 11 abuts on the upper end surface 71 of the housing 7, and more specifically, the finger side of the inclined surface 113 is on the side of the filter 8. Contact. Therefore, there is no gap between the finger F and the contact portion 11, the blood flow image of the finger F is not reflected on the housing 7, and all of the blood flow image passes through the filter 8. Therefore, the blood flow image of the finger F of the person to be authenticated can be clearly taken, and the accuracy of authentication can be improved.
  • the filter 8 has a flat shape located above the imaging unit 6, but in other embodiments, the filter 8 has a shape curved toward the inside of the housing 7 along the shape of the finger F. You can also do it. Further, when near-infrared light having a wavelength longer than that of visible light is used as the light source 3, the filter 8 may transmit the near-infrared light or the like, and therefore does not necessarily have to be visually transparent.
  • the storage unit 9 is a storage device that stores registrant blood flow pattern information, blood flow shape information such as blood flow images, control programs, and the like.
  • the stored information includes the finger width information divided into a plurality of classes according to the finger width, and the blood of the finger F imaged by the imaging unit 6 by irradiating light from the light source 3 in advance.
  • the blood flow pattern information created by extracting the characteristic portion from the captured blood flow image of the finger F is used as the blood flow shape information, but the captured blood flow image of the finger F itself.
  • the storage unit 9 examples include main storage devices such as RAM, ROM, HDD, and SSD, and auxiliary storage devices. Further, the storage unit 9 may be provided inside the support unit 2, the housing 7, or the like, or may be provided inside another member adjacent to or away from the housing 7.
  • the control unit 10 stores the image of the finger F of the authenticated person captured by the image pickup unit 6 and the blood vessel pattern information in the storage unit 9. It is a control device that performs various processes such as personal authentication by collating with the blood vessel pattern information of.
  • the control unit 10 is composed of various processing devices such as a CPU. Further, the control unit 10 can be provided inside the support unit 2, the housing 7, or the like, or can be provided inside another member adjacent to or away from the housing 7.
  • the movable portion 1 and the urging means S are used by inserting the finger F of the person to be authenticated.
  • the pressure sensor 4 fixed to the movable support portion 2 senses the light
  • the light source 3 built in the movable portion 1 irradiates the light
  • the imaging unit 6 photographs the light transmitted through the finger F. Therefore, the blood flow authentication device can correctly take a blood flow image of the finger F of the person to be authenticated and improve the accuracy of authentication.
  • the amount of light emitted from the light source 3 can be adjusted by using the electric signal output by the pressure sensor 4 with a different value according to the thickness of the finger F of the person to be authenticated, or the finger F of the person to be authenticated. Information about the thickness of the can be used for personal authentication.
  • "adjusting the amount of light emitted from the light source 3" means, specifically, for each predetermined threshold value based on the average value of the electric signal values output from the left and right pressure sensors 4. It is classified into a plurality of classes, and the amount of light corresponding to the class is set.
  • Light is emitted from the light source 3 according to the amount of light corresponding to the corresponding class from the left and right average values of the output electric signals with a load applied to the light source. For example, first, based on the electric signal output from the pressure sensor 4, three classes are prepared, which are separated by a predetermined threshold value so as to correspond to a person with a narrow finger width, a normal person, and a thick person. Next, the amount of light corresponding to the class of people with narrow finger width is less than the standard amount of light, the amount of light corresponding to the class of people with normal finger width is set to the standard amount of light, and the amount of light corresponding to the class of people with wide finger width is corresponding to the class of people with wide finger width.
  • the amount of light is set in advance to be larger than the standard amount of light.
  • the information on the thickness of the finger F of the person to be authenticated is used for personal authentication
  • the movable part 1 rotates when the authenticated person's finger F is inserted by inputting the class into the database associated with the registrant name, registration ID, registrant's blood flow pattern information, etc.
  • the support unit 2 moves, a load is applied to the pressure sensor 4, and authentication is started with priority given to the corresponding class in the above database from the left and right average values of the output electric signals.
  • the registrant's blood flow pattern information and finger width information A obtained by imaging together with the registrant name, registrant ID, and the like, It is associated and stored as B and C.
  • the finger width information A, B, and C are three classes divided by a predetermined threshold value based on the value of the electric signal output from the pressure sensor 4.
  • a person with a narrow finger width is an A class, and an ordinary person. Is compatible with B class, and thick people are compatible with C class.
  • the blood flow authentication device of the present invention is configured, and as shown in FIG. 5, personal authentication is performed according to the following processing procedure.
  • step 100 the person to be authenticated inserts the finger F from above along the pair of movable portions 1.1 and brings the finger F into contact with the inner side surfaces 21 and 21 of the support portions 2.2. ..
  • step 110 the movable portion 1 and 1 rotate in response to the insertion of the finger F, and the urging means S fixed to the support portion 2 and 2 interlocked with the movable portion 1 and 1.
  • the pressure sensors 4 and 4 acquire the finger width information via S.
  • step 120 from the average value of the detected values of the electric signals output from the left and right pressure sensors 4 and 4, which class among the plurality of classes classified for each predetermined bar value corresponds to. Acquires finger width information.
  • step 130 the LED that is the light source 3 is made to emit light with the amount of light corresponding to the finger width information in step 120, and the light is irradiated from diagonally above the back side of the finger F of the person to be authenticated.
  • the control unit 10 notifies the substrate 31 of the finger width information of the person to be authenticated, and irradiates light from the light source 3 with a light amount corresponding to the finger width information.
  • step 140 the control unit 10 operates the image pickup unit 6 to take an image of the finger F.
  • the captured image is transmitted to the control unit 10.
  • a plurality of images are imaged by increasing or decreasing the amount of light based on the amount of light corresponding to the finger width information, and then a predetermined area is cut out and joined or superposed to form an image of one finger F. It may be the one that captures only one image with the amount of light corresponding to the finger width information.
  • the image processing is not limited to this, and processing can be combined as appropriate.
  • step 150 the control unit 10 determines whether or not the captured image matches the blood flow pattern information, which is a type of blood flow shape information registered by the person to be authenticated. Then, at this time, as shown in FIG. 5 described above, the information is registered in a plurality of classes classified by a predetermined group value based on the average value of the electric signal values output from the left and right pressure sensors 4 and 4.
  • the movable part 1.1 is inserted when the person to be authenticated's finger F is inserted.
  • the vein shape is pattern-extracted, image-processed, and feature point extraction and feature point collation are used as in the conventional case.
  • Other collation processing such as storing the blood flow image itself of the certifier in place of the blood flow pattern information in FIG. 6 as a database and collating it can also be adopted.
  • the control unit 10 determines that the person to be authenticated is a conforming person. For example, by interlocking with the door unlocking device installed outdoors, it is possible to transmit a signal of being a conforming person to the door locking device and perform the unlocking operation in the locking device. Further, by interlocking with the equipment and the like installed in the factory, it is possible to transmit a signal of being a conforming person to the equipment and to accept the operation in the equipment.
  • the person to be authenticated needs to have a certain authority even if he / she is a registrant, he / she further determines whether he / she has the authority to use the database and has the authority to use it.
  • the equipment can be made to accept operations only when it is present.
  • the finger F is inserted into the movable portion 1, the support portion 2 moves against the urging force of the urging means S, and the finger F is inserted.
  • the pressure sensor 4 detects the resulting load, and based on the finger width information obtained by the pressure sensor 4, the finger F is irradiated with light from the light source 3 with an adjusted amount of light to capture a blood flow image of the finger F and register it. It authenticates the blood flow shape information of a person. This alleviates the scattering of light in the finger F, is not affected by the reflection on the side surface of the finger F, reduces the influence of the light from the outside, and makes the contrast of the blood vessel image clear, and is certified. The blood flow image of the person's finger F can be correctly taken, and the accuracy of authentication can be improved.

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PCT/JP2019/032950 2019-08-23 2019-08-23 血流認証装置 WO2021038615A1 (ja)

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JP2021541753A JPWO2021038615A1 (enrdf_load_stackoverflow) 2019-08-23 2019-08-23
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004265269A (ja) * 2003-03-04 2004-09-24 Hitachi Ltd 個人認証装置
JP2010256971A (ja) * 2009-04-21 2010-11-11 Hitachi Omron Terminal Solutions Corp 生体認証装置

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JP2004265269A (ja) * 2003-03-04 2004-09-24 Hitachi Ltd 個人認証装置
JP2010256971A (ja) * 2009-04-21 2010-11-11 Hitachi Omron Terminal Solutions Corp 生体認証装置

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