JP7458643B2 - Terminal device for blood flow authentication device and entrance/exit control device using the same - Google Patents

Description

The present invention relates to a terminal device for a blood flow authentication device and a blood flow authentication device that performs personal authentication using blood vessel patterns obtained by imaging light that has passed through a human finger.

Fingerprint authentication is conventionally known as a personal authentication technique for personal authentication, but blood flow authentication based on blood vessel patterns has been developed due to the problem that fingerprints of other people can be forged.

In this blood flow authentication, the blood vessel patterns are each independent, and no two blood vessels have the same shape. In addition, since blood vessels are difficult to determine from their appearance, they are difficult to forge, and authentication can be performed with high accuracy.

For example, Patent Document 1 discloses a base on which a finger is placed, and a base that is located at one end of the base and installed in front of the fingertip of the finger placed on the base, and is arranged from the front of the fingertip toward the back of the finger. There is a light source that irradiates light to the base of the finger, and a light source that is placed on the base corresponding to the belly side of the finger and just below the finger, and the irradiation light emitted from the light source passes through the finger. A terminal device for a blood flow authentication device is disclosed, which includes an imaging device that captures a blood vessel image.

JP2014-99149

In the blood flow authentication device terminal device disclosed in Patent Document 1, the blood flow pattern may become unclear in cold weather or in situations where the blood vessels are narrow, such as in women, and the accuracy of personal authentication decreases. There was a risk. Furthermore, in the terminal device for the blood flow authentication device disclosed in Patent Document 1, the blood flow pattern can be clearly visualized by various adjustments such as adjusting the light intensity using the control device and superimposing the obtained blood flow patterns. Although this would improve the accuracy of personal authentication, it was not possible to measure the health status of individuals.

The present invention is intended to solve these problems, and improves the accuracy of personal authentication by clearly imaging blood flow patterns even in situations where blood vessels are thin, such as in women. An object of the present invention is to provide a terminal device for a blood flow authentication device that can also acquire information.

[1] The present invention relates to a housing (20) having an insertion hole (21) for inserting a finger (F); a near-infrared light source (30) for irradiating near-infrared light into the inside of the housing (20) toward the back (F1) side of the finger (F) that is inserted by contacting the back (F1) side of the finger (F) with the inner wall surface of the insertion hole (21) without contacting the pad (F2) side of the finger (F) with the inner wall surface of the insertion hole ( 21 ); a red light source (31) arranged in parallel with the near-infrared light source (30); a first imaging unit (40) for imaging the near-infrared light and red light that are irradiated from the near-infrared light source (30) and the red light source (31) and transmitted through the finger (F) at a position facing the near-infrared light source (30) and the red light source (31); and a second imaging unit (41) disposed on the tip side of a second imaging device holding unit (412) facing a red light source (31), rotatable about a rotation axis (411) , and biased by a biasing member (S) to approach the inserted finger (F) and come into contact with the finger (F).

[2] The terminal device (10) for the blood flow authentication device described in [1] is characterized in that it is provided with a fingertip detection sensor (50) that is installed at a position corresponding to the fingertip (F3) of the finger (F) that contacts the inner wall surface, positions the fingertip (F3) by the contact of the fingertip (F3), and detects the contact of the fingertip (F3), and a finger base detection sensor (60) that is installed at a position corresponding to the base (F5) of the finger that contacts the inner wall surface and detects the contact of the base.

[3] The terminal device (10) for a blood flow authentication device according to the above [1] or [2], characterized by comprising magnets (70) arranged on both sides of the inserted finger. It is.

[4] The blood flow authentication device terminal device (10) according to any one of [1] to [3] above, and the control of the blood flow authentication device terminal device (10) and the blood flow authentication device terminal device (10) according to any one of [1] to [3] above. A blood flow authentication device comprising an authentication control device that performs personal authentication regarding a finger (F) inserted into a terminal device (10) for a flow authentication device, and a door or a wall adjacent to the door that operates in conjunction with the blood flow authentication device. This room entry/exit control device is characterized in that it includes a lock device that is attached to the door and has a locking means that locks with the corresponding door or a wall adjacent to the door.

The terminal device for the blood flow authentication device of the present invention can clearly capture blood flow patterns even in situations where the blood vessels are thin, such as in women, improving the accuracy of personal authentication, and can also be used as a blood flow authentication device that can obtain the user's health information when performing personal authentication.

FIG. 2 is a longitudinal cross-sectional view of the terminal device for a blood flow authentication device in use in the first embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view of the terminal device for a blood flow authentication device according to the first embodiment of the present invention when it is not in use. 2 is a cross-sectional view taken along line AA when the terminal device for the blood flow authentication device in the first embodiment of the present invention is in use. FIG. FIG. 2 is a sectional view taken along line BB when the terminal device for a blood flow authentication device according to the first embodiment of the present invention is in use. 10 is a flowchart showing a blood flow authentication process in a blood flow authentication device using a terminal device for the blood flow authentication device in the first embodiment of the present invention. FIG. 7 is a cross-sectional view corresponding to FIG. 3 when the terminal device for the blood flow authentication device in the second embodiment of the present invention is in use. FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a terminal device for a blood flow authentication device according to an embodiment of the present invention will be described based on the drawings. The blood authentication device using the terminal device for the blood flow authentication device is inserted into the insertion hole of the housing with the back side of the finger of the person to be authenticated placed on the upper side and the palm side placed on the lower side. The blood vessel pattern is imaged and authenticated with the back of the finger in contact with the upper side of the inner wall surface of the insertion hole.

A terminal device 10 for a blood flow authentication device according to the present invention is used to authenticate a blood vessel pattern of a person to be authenticated. The blood flow is connected to an authentication control device (not shown) that controls the second imaging device 41, etc., and performs personal authentication by storing registered or imaged blood vessel patterns, storing oxygen saturation (SpO2), and performing matching processing. Configure the authentication device. As shown in FIGS. 1 to 4 or 6, the blood flow authentication device terminal device mainly includes a housing 20 into which the finger F of the person to be authenticated is inserted to image the blood pattern, an infrared light source 30, and a red color. It includes a light source 31, a first imaging device 40, a second imaging device 41, a fingertip detection sensor 50, a fingertip detection sensor 60, a magnet 70, and the like.

The housing 20 is provided with an insertion hole 21 into which the finger F of the person to be authenticated whose blood pattern is to be imaged is inserted. In the housing 20, LEDs serving as a near-infrared light source 30 and a red light source 31 are arranged in parallel above the insertion hole 21, and a plurality of LEDs are arranged and enclosed along the axial direction of the insertion hole 21. On the other hand, in the housing 20, a first imaging device 40 is disposed on the bottom F2 side of the finger F, which is the lower side of the insertion hole 21, at a position facing the near-infrared light source 30 and the red light source 31. A second imaging device 41 is arranged on the fingertip F3 side at a position facing the near-infrared light source 30 and the red light source 31.

Furthermore, on the inner wall surface located above the insertion hole 21, a transparent plate 22 made of synthetic resin such as acrylic through which the near-infrared light source 30 and the red light source 31 can pass is interposed. This prevents the fingers F from coming into direct contact with the near-infrared light source 30 and the red light source 31.

Furthermore, as shown in FIG. 3, on the inner wall surface located on the upper side of the housing 20, a pair of left and right light sources are provided, centering on a near-infrared light source 30 and a red light source 31, which are arranged along the axial direction of the insertion hole 21. A supporting portion 23 is provided to protrude downward.

The support part 23 supports both sides of the finger F of the person to be authenticated who performs blood flow authentication. Specifically, the finger F of the person to be authenticated is located directly below the near-infrared light source 30 and the red light source 31, and the inner wall surface of the insertion hole 21 in the housing 20 contacts the instep F1 side of the finger F of the person to be authenticated. In this state, both sides of the finger F are supported.

The support portion 23 is composed of a pair of left and right supports, which are installed so as to protrude from above to below along the inner wall surface of the insertion hole 21 with a predetermined gap between them. That is, depending on the shape of the insertion hole 21, it may be linear or curved with respect to the axial direction. Further, the support portion 23 is formed with a length corresponding to approximately the entire length in the longitudinal direction of the finger F, and may be formed approximately in the shape of a “C” as shown in FIG. As shown in FIG. 6, the portion that contacts F may be formed into a bent shape like a dogleg or a substantially circular arc shape, as shown in FIG. The support portion 23 formed in this way is made of a material that blocks visible light and near-infrared light. Thereby, it is possible to reduce the wraparound of light from the near-infrared light source 30 and the red light source 31 to the first imaging device 40 and the second imaging device 41, and it is possible to suppress the occurrence of halation during imaging.

Although the support section 23 supports one finger F to be authenticated, similar support sections can also be provided on one or both sides of the support section 23. In this way, by providing multiple support sections, it is possible to support adjacent fingers other than the finger F to be authenticated. This makes it possible to prevent so-called rolling, in which the finger F supported by the support section rotates along the axis of the finger F. By preventing rolling, it is possible to stabilize the captured image and capture a clearer vascular pattern.

Furthermore, as shown in FIGS. 3, 4, and 6, magnets 70 are disposed on each of the left and right support portions 23 so as to sandwich the inserted finger F therebetween. In the present embodiment, the magnet 70 is disposed on the finger F side of the support section 23, but the magnet 70 is disposed on the opposite side of the support section 23 from the finger F side. You can leave it there. Furthermore, in the present embodiment, two magnets 70 are disposed on the support portion 23 along the axial direction of the insertion hole 21 in the housing 20, that is, along the longitudinal direction of the inserted finger F; Of course, the present invention is not limited to this, and one or a plurality of three or more may be provided.

A fingertip detection sensor 50 is provided at a position corresponding to the fingertip F3 of the finger F inserted into the insertion hole 21, and a fingertip detection sensor 60 is provided at a position corresponding to the fingertip of the finger F. Furthermore, in the housing 20, a filter 80 that does not transmit light other than near-infrared light and red light is provided above the first imaging device 40.

The near-infrared light source 30 is a member that emits near-infrared light, such as an LED having a condensing lens at its tip. It is preferable that the wavelength of the near-infrared light emitted from the near-infrared light source 30 is 700 nm or more and less than 2500 nm. This near-infrared light passes through the finger F of the person to be authenticated and highlights the blood vessel pattern in the finger F of the person to be authenticated. More specifically, in the artery of finger F, hemoglobin combines with oxygen to become oxyhemoglobin (HbO2) and flows, and the oxyhemoglobin (HbO2) absorbs near-infrared light with a wavelength of 940 nm. , a difference occurs in the translucency of the finger F, and the blood flow pattern can be imaged. In this embodiment, the near-infrared light source 30 and the red light source 31, which will be described later, are packaged as one component, but in other embodiments, the near-infrared light source 30 and the red light source 31 may be packaged as separate components. It can also be used as an independent light source. Further, in this embodiment, the near-infrared light source 30 and the red light source 31 are packaged and arranged as five LED lights along the longitudinal direction of the finger F, but the number is not limited to these. . Furthermore, the near-infrared light source 30 and the red light source 31 can each be formed as elongated light-emitting elements. The amount of light emitted from the near-infrared light source 30 and the irradiation time can be controlled by a light amount adjusting means.

The red light source 31 is a member that emits red light, such as an LED equipped with a focusing lens at the tip. The wavelength of the red light irradiated from the red light source 31 is preferably 620 nm or more and less than 750 nm, and more preferably 620 nm or more and less than 700 nm. This red light penetrates the finger F of the person to be authenticated and makes the blood vessel pattern of the finger F of the person to be authenticated stand out. More specifically, in the veins of the finger F, hemoglobin is released from oxygen and flows as reduced hemoglobin (Hb), and this reduced hemoglobin (Hb) absorbs red light with a wavelength of 660 nm well, which creates a difference in the translucency of the finger F and allows the blood flow pattern to be imaged. The amount of light irradiated from the red light source 31 and the irradiation time can be controlled by a light amount adjustment means.

In this way, by using light sources with different wavelengths, the near-infrared light source 30 and the red light source 31, it is possible to image arteries and veins, so even in situations where blood vessels are thin, such as in women, blood flow patterns can be clearly seen. It is possible to improve the accuracy of personal authentication by capturing images. Furthermore, the oxygen saturation level (SpO2) of arterial blood can be measured by calculating the ratio of oxyhemoglobin (HbO2) in the artery to deoxyhemoglobin (Hb) in the vein. Health management can be performed through the measurement of oxygen saturation (SpO2). The normal value of oxygen saturation (SpO2) is 97 to 100%, so when it is lower than a predetermined threshold divided into one or several stages, there are various possible causes such as viral pneumonia such as COVID-19. It can be seen that it is better to seek medical attention immediately. For example, when a blood flow authentication device terminal device is used for the purpose of unlocking the door of a residential building or office where users enter and exit, the daily oxygen saturation (SpO2) of each individual is authenticated. It can be measured and managed at the same time, allowing more accurate changes in health status to be determined based on the individual differences of each individual. In addition, by connecting the blood flow authentication device terminal device to a remote medical system etc. via wireless or wire, it becomes possible for each individual's health information to be managed at medical institutions as well, allowing for rapid rescue of individuals who are not feeling well. It is also possible to do so.

The first imaging device 40 images a blood vessel pattern obtained by transmitting the finger F and the filter 80 out of the light emitted from the near-infrared light source 30 and the red light source 31. The first imaging device 40 is equipped with an imaging element, an optical system including a lens, and an imaging driving circuit, and the finger F of the person to be authenticated is placed below the insertion hole 21, that is, further below the filter 80. It is installed at a lower position on the side of the pad F2 of the finger F, which faces the near-infrared light source 30 across it. Specifically, the optical axis of the first imaging device 40 is installed at a position below approximately the center in the longitudinal direction where the near-infrared light source 30 is installed. Further, the first imaging device 40 focuses slightly on the inside of the finger from the epidermis on the palm side of the person to be authenticated in order to prevent fingerprints and the like from being recognized. Further, the oxygen saturation level (SpO2) of the arterial blood is determined by the arithmetic processing means from the absorbance due to oxyhemoglobin (HbO2) in the artery and the absorbance due to deoxyhemoglobin (Hb) in the vein, which are photographed by the first imaging device 40. can be measured.

The second imaging device 41 is an imaging device installed at a position corresponding to the fingertip F3 of the finger F, facing the near-infrared light source 30 and the red light source 31 on the fingertip F3 side of the finger F inserted into the insertion hole 21. It is. The blood vessel pattern obtained from the light transmitted through the fingertip F3 among the light emitted from the near-infrared light source 30 and the red light source 31 is imaged, and the absorbance due to oxyhemoglobin (HbO2) in the artery and deoxyhemoglobin (Hb) in the vein are imaged. The oxygen saturation level (SpO2) of arterial blood is measured by arithmetic processing means from the absorption level. When measuring oxygen saturation (SpO2), it is easier to measure the absorption of oxyhemoglobin (HbO2) and deoxyhemoglobin (Hb) in the artery and vein at the fingertip F3 than in the middle of the finger. ), the second imaging device 41 is installed at a position corresponding to the fingertip F3 of the finger F and below the fingertip detection sensor 50. In the first embodiment, the second imaging device 41 is rotatable around a rotation shaft 411 disposed below the light-transmitting plate 22, as shown in FIGS. 1 and 2, and is rotated by a spring. It is disposed on the distal end side of the second imaging device holding section 412 which is urged by a certain urging member S to approach the inserted finger F. As a result, when the finger F is inserted, the second imaging device 41 comes into approximate contact with the finger F, making it less susceptible to light coming from the surroundings and benefiting from near-infrared light and red light transmitted through the fingertip F3. blood vessel patterns can be imaged more clearly. In this way, the second imaging device 41 is intentionally provided as a separate member from the first imaging device 40, specifically for measuring oxygen saturation (SpO2). The second imaging device 41, like the first imaging device 40, includes an imaging element, an optical system including a lens, and an imaging drive circuit. The second imaging device 41 also focuses on the inside of the finger F of the person to be authenticated from the epidermis on the pad F2 side.

The fingertip detection sensor 50 detects the fingertip F3 of the person to be authenticated, which is inserted into the insertion hole 21 of the housing 20. The fingertip detection sensor 50 is installed at a position corresponding to the fingertip F3 of the finger F of the fingertip detection sensor holding part 51 disposed below the transparent plate 22, and is formed of, for example, a metal member. When the fingertip F3 of the person to be authenticated contacts the fingertip detection sensor 50, the fingertip F3 is positioned in the axial direction in the insertion hole 21, and the contact is electrically detected. Specifically, the surface of the fingertip detection sensor 50 is made of a conductive material such as aluminum, and contact is detected by a change in capacitance.

Further, the fingertip detection sensor 50 is installed at a height such that the fingertip F3 of the person to be authenticated comes into contact with it and the nail F4 of the finger F of the person to be authenticated does not come into contact with it. For example, it may be installed at the tip of the approximately L-shaped fingertip detection sensor holding portion 51 that protrudes downward from above the inner wall surface of the insertion hole 21 in the housing 20 as in the first embodiment, or It may be installed at the tip of a member that is directed downward from the top of the inner wall surface of 21 and has a hole through which the nail F4 of the person to be authenticated can be inserted.

The finger detection sensor 60 detects the finger F5 of the person to be authenticated, which is inserted into the insertion hole 21 of the housing 20. The finger base detection sensor 60 is installed at a position corresponding to the finger base F5 of the finger F supported by the support portion 23, and is formed from, for example, a rectangular metal plate. When the finger base F5 of the person to be authenticated contacts the finger base detection sensor 60, the contact is electrically detected. Specifically, the surface of the finger detection sensor 60 is made of a conductive material such as aluminum, and contact is detected by a change in capacitance.

Further, the finger base detection sensor 60 is configured such that the finger F of the person to be authenticated is located directly under the near-infrared light source 30, and the inner wall surface of the insertion hole 21 in the housing 20 and the instep F1 side of the finger F of the person to be authenticated are It is installed so as to touch the instep F1 side of the finger base F5 in a state of contact. The lower end surface of the finger base detection sensor 60 that the finger base F5 comes into contact with is desirably formed into a substantially arc shape to match the shape of the finger base F5. Thereby, the finger base F5 of the person to be authenticated can be supported reliably, and the finger F can be reliably detected.

Then, by both the fingertip detection sensor 50 and the fingertip detection sensor 60 detecting the finger F of the person to be authenticated, it can be determined that the finger is not a pseudo finger but a living body. In this way, it is preferable to perform control so that the detected blood flow authentication operation is started after both the fingertip detection sensor 50 and the fingertip detection sensor 60 have confirmed that it is the finger F of the person to be authenticated.

Further, in the fingertip detection sensor 50 and the finger base detection sensor 60, the fingertip detection sensor 50 has a high potential and the finger base detection sensor 60 has a low potential, or the fingertip detection sensor 50 has a low potential and the finger base detection sensor 60 has a high potential. As such, a predetermined potential difference is provided to the extent that it does not affect the health of the person to be authenticated. Due to the potential difference between the fingertip detection sensor 50 and the fingertip detection sensor 60, positive and negative ions in the artery and inside become easier to flow, and the blood flow reaches the fingertip F3, so that the oxygen saturation (SpO2) measured at the fingertip F3 is ) accuracy can be improved.

The magnets 70 are disposed on both sides of the inserted finger F, that is, on both the left and right sides of the finger F, as shown in FIGS. 3, 4, and 6. More specifically, the magnets 70 are disposed on support portions 23 that protrude along the inner wall surface of the insertion hole 21 at a predetermined distance from each other on the left and right sides. The magnets 70 arranged in this manner cause positive and negative ions in the arteries and veins to move in a direction perpendicular to the extending direction of the blood vessels due to the Lorentz force, thereby generating an electromotive force. Furthermore, this electromotive force increases ions in the blood, which affects the autonomic nervous system and improves blood circulation. In this way, even in situations where the blood vessels are thin, such as in women, blood can be sufficiently sent to the fingertip F3, and the blood flow pattern can be photographed more clearly, making it possible to stabilize authentication accuracy. , the accuracy of oxygen saturation (SpO2) measured with the fingertip F3 can be improved. Preferably, the magnet 70 is a permanent magnet such as a ferrite magnet, a samarium cobalt magnet, or a neodymium magnet, or an electromagnet.

The blood flow authentication device terminal device 10 is configured in this way, and the blood flow authentication device configured by connecting an authentication control device (not shown) thereto will be described with reference to FIG. 5. The authentication control device authenticates the blood vessel pattern of the person to be authenticated, turns on the near-infrared light source 30 and the red light source 31, controls the fingertip detection sensor 50, the fingertip detection sensor 60, the first imaging device 40, the second imaging device 41, etc. It performs personal authentication through control, storage of registered or imaged blood vessel patterns, matching processing, and the like.

As shown in FIG. 5, a process related to blood flow authentication will be described below. When the blood flow authentication device is powered on and in a standby state, first, in step S11, it is determined whether the finger F is detected by both the fingertip detection sensor 50 and the fingertip detection sensor 60 due to the operation of the person to be authenticated. Determine whether or not. This determination is performed by the authentication control device connected to the blood flow authentication device terminal device 10. If the determination result is positive, the inserted object is assumed to be a biological finger F and the process proceeds to step S12 to start the authentication operation; if negative, it is assumed that the inserted object is not a biological body and the authentication operation is not started and a voice is issued to that effect. The blood flow authentication process is terminated by notifying that it is inappropriate by outputting an output or sounding a buzzer.

In step S12, the near-infrared light source 30 is caused to emit light by the authentication control device, and light is emitted from the instep F1 side of the finger F of the person to be authenticated. Then, for example, when the illuminance of the IR-LED is stabilized by a predetermined setting in the light amount adjusting means, the process proceeds to step S13.

In step S13, the authentication control device operates the first imaging device 40 and the second imaging device 41 to mainly image the blood vessel pattern of the artery of the finger F. The captured image is supplied to the authentication control device. In imaging with the first imaging device 40, a plurality of images may be taken for each appropriate illuminance, and then a predetermined area may be cut out and stitched together to form a single image of the finger F, or a predetermined It may also be possible to capture only one image from an illuminance of . Image processing is not limited to this, and may be performed in combination as appropriate. In the second imaging device 41, it is preferable to capture an image with the same illuminance as that of the red light source 31.

In step S14, the near-infrared light source 30 is turned off by the authentication control device. This is because the near-infrared light source 30 is not lit at the same time when the red light source 31 is lit next time. After turning off the near-infrared light source 30, the process advances to step S15.

In step S15, the authentication control device causes the red light source 31 to emit light, and irradiates light from the instep F1 side of the finger F of the person to be authenticated. Then, for example, when the illuminance of the IR-LED is stabilized by a predetermined setting in the light amount adjusting means, the process proceeds to step S16.

In step S16, the authentication control device operates the first imaging device 40 and the second imaging device 41 to mainly image the blood vessel pattern of the veins of the finger F. The captured image is supplied to the authentication control device. In imaging with the first imaging device 40, a plurality of images may be taken for each appropriate illuminance, and then a predetermined area may be cut out and stitched together to form a single image of the finger F, or a predetermined It may also be possible to capture only one image from an illuminance of . Image processing is not limited to this, and may be performed in combination as appropriate. In the second imaging device 41, it is preferable that the illuminance is matched with that of the near-infrared light source 30 for imaging.

In step S17, the authentication control device turns off the red light source 31. After turning off the near-infrared light source 30, the process proceeds to step S18. Note that in this embodiment, the near-infrared light source 30 is turned on first to image the artery, and then the red light source 31 is turned on to image the vein. However, in other embodiments, it is of course possible to turn on the red light source 31 first to image the vein, and then turn on the near-infrared light source 30 to image the artery.

In step S18, the authentication control device determines whether the image captured by the first imaging device 40 in steps S13 and S16 matches the registered image of the person to be authenticated. At this time, in this embodiment, blood flow authentication is performed by extracting a pattern from the shape of the blood flow, performing image processing, and using feature point extraction and feature point matching in the same manner as in the past. Processing may also be employed.

As a result of blood flow authentication, if the captured image and the registered image match or have a predetermined matching rate or higher, the authentication control device determines that the person to be authenticated is a suitable person, and proceeds to step S19. On the other hand, if it is determined that the person to be authenticated is not a conforming person, the blood flow authentication process is terminated by notifying the person that the person is not a conforming person by outputting a voice or sounding a buzzer to that effect.

In step S19, information such as brightness is handled as the difference in absorbance between arteries and veins from the images taken by the second imaging device 41 in steps S13 and S16, and the arithmetic processing means built in the authentication control device The oxygen saturation level (SpO2) of the blood is calculated and stored in a storage means built into the authentication control device in association with identification information such as the name of the person to be authenticated. Then, a compatible person signal is sent, and the blood flow authentication process ends.

Then, using the suitable person signal in step S19 as a trigger, it is possible to perform at least one of unlocking and locking of a locking device operated by electricity or the like. Specifically, it is attached to a door or a wall adjacent to the door in a residential building or office where a user enters and exits, and connects the blood flow authentication device with the blood flow authentication device terminal device 10 by wire or wirelessly. In the interlocking locking device, when receiving a compatible person signal notified from the blood flow authentication device, for example, as part of the unlocking process, the locking device engages a door such as a deadbolt provided in the locking device or a wall adjacent to the door. A locking means for locking the door is housed in a locking device so that the door can be opened. Similarly, in the locking process, when a compatible person signal notified from the blood flow authentication device is received, the locking means is made to protrude from the locking device to the door or the wall adjacent to the door, and The door is locked to a wall adjacent to the door to prevent the door from being opened. This means that if the door is provided with a locking device, the locking means will lock with the wall adjacent to the door, or if the locking device is provided in the wall adjacent to the door, This means that the locking means locks with the door. In addition, if necessary, it is possible to view the history of oxygen saturation (SpO2) saved in the past, and when it is lower than a predetermined threshold, a caution or warning is issued to the person being authenticated. You can also do that. In addition, at this time, the blood flow authentication device terminal device 10 may be provided on the door, or may be provided on the wall adjacent to the door. In this way, a blood flow authentication device including the blood flow authentication device terminal device 10 and an authentication control device, and a room entry/exit control device including a lock device can be obtained.

According to the blood flow authentication device terminal device 10 and the blood flow authentication device according to the present invention described above, the pad F2 side of the finger F is brought into contact with the lower side of the inner wall surface of the insertion hole 21 provided in the housing 20. The instep F1 side of the finger F is inserted in contact with the upper side of the inner wall surface without touching the inner wall surface, and the light from the near-infrared light source 30 and the red light source 31 is applied to the instep F1 side of the finger F from above inside the housing 20. This is used to image a blood vessel pattern by irradiating it. As a result, even if the person to be authenticated is not proficient in using the blood flow authentication device, the blood vessels distributed on the F2 side of the finger F will not be compressed, and even if the person is a woman with thin blood vessels. Blood flow patterns can be clearly imaged. Therefore, it is possible to prevent a reduction in the recognition rate due to a reduction in the imaging effect, and to obtain a clearer image than in the past.

Furthermore, according to the described terminal device 10 for a blood flow authentication device and the blood flow authentication device according to the present invention, the blood flow can be distributed even to the fingertip F3, so that oxygen saturation (Sp02) can be measured with high accuracy. can do. Therefore, as described above, by providing a locking device that works with the blood flow authentication device including the blood flow authentication device terminal device 10 on the door or on the wall adjacent to the door, high security can be achieved through highly accurate personal authentication. At the same time, health checks can be performed by measuring oxygen saturation (Sp02) in daily life. Since the individual person to be authenticated can be identified, by linking the blood flow authentication device with a remote diagnosis system, etc., it becomes possible to manage the oxygen saturation level (Sp02) of each person to be authenticated at a remote medical institution. After checking by a doctor or artificial intelligence, it will be possible to give advice on the individual's communication means such as a smartphone or to conduct a test at a medical institution. In addition, since the individual person to be certified can be identified, the average value of the oxygen saturation (Sp02) of the person to be certified over a certain period in the past can be calculated, and abnormal values can be remotely determined based on the volatility of the average value. You will be able to do it with In this way, in these days when the average lifespan is increasing, everyday actions such as opening and closing the door can contribute to preventive medicine and greatly contribute to extending healthy life expectancy.

In the above embodiment, the finger F of the person to be authenticated is inserted into the insertion hole 21 of the housing 20 with the instep F1 side placed on the upper side and the belly F2 side placed on the lower side. Although the blood vessel pattern is imaged and authenticated with the instep F1 side of the finger F in contact with the upper side of the inner wall surface in 21, the present invention is not limited to this. On the other hand, it is sufficient to irradiate the inside of the casing 20 with light from the near-infrared light source 30 and the red light source 31 to image the blood vessel pattern.

For example, it may be configured such that the finger F of the person to be authenticated can be inserted into the insertion hole 21 of the housing 20 with the instep F1 side placed on the lower side and the finger F2 side placed on the upper side. It can also be configured such that it can be inserted into the insertion hole 21 with the F1 side placed on the right or left side and the belly F2 side placed on the left or right side. Furthermore, it may be configured such that the instep F1 side can be inserted into the insertion hole 21 with the instep F1 side inclined in a direction other than the vertical and horizontal directions.

Further, the shape of the insertion hole 21 of the housing 20, the shape, dimensions, etc. of the fingertip detection sensor 50 and the fingertip detection sensor 60 can be changed as appropriate. Moreover, it is of course possible to omit some of the configurations, or to use a configuration in which some of the configurations are extracted.

10 Blood flow authentication device terminal device 20 Housing 21 Insertion hole 22 Transparent plate 23 Support part 30 Near-infrared light source 31 Red light source 40 First imaging device 41 Second imaging device 411 Rotation shaft 412 Second imaging device holding section 50 Fingertip detection sensor 51 Fingertip detection sensor holding section 60 Fingertip detection sensor 70 Magnet 80 Filter F Finger S Biasing member

Claims (4)

A housing having an insertion hole for inserting a finger;
a near-infrared light source that irradiates near-infrared light into the inside of the housing toward the back of the finger that is inserted with the back of the finger in contact with the inner wall surface of the insertion hole without the pad of the finger in contact with the inner wall surface of the insertion hole;
A red light source disposed in parallel with the near-infrared light source;
a first imaging unit configured to capture an image of the near-infrared light and the red light irradiated from the near-infrared light source and the red light source and transmitted through the finger at a position facing the near-infrared light source and the red light source;
a second imaging unit disposed on a tip side of a second imaging device holding unit , the second imaging unit being rotatable about a rotation axis and biased by a biasing member to approach the inserted finger and come into contact with the finger, the second imaging unit being disposed on a tip side of the second imaging device holding unit, the second imaging unit being rotatable about a rotation axis and coming into contact with the inserted finger, the second imaging unit being biased by a biasing member to approach the inserted finger and come into contact with the finger;
A terminal device for a blood flow authentication device comprising: a fingertip detection sensor that is installed at a position corresponding to the fingertip of the finger that contacts the inner wall surface, and that positions the fingertip by contact with the fingertip and detects contact of the fingertip;
The blood flow authentication device according to claim 1, further comprising a finger base detection sensor that is installed at a position corresponding to the base of the finger that contacts the inner wall surface and detects contact with the base of the finger. Terminal equipment. The terminal device for a blood flow authentication device according to claim 1 or 2, further comprising magnets arranged on both sides of the inserted finger. The terminal device for a blood flow authentication device according to any one of claims 1 to 3, and the control of the terminal device for the blood flow authentication device and the information regarding the finger inserted into the terminal device for the blood flow authentication device. A blood flow authentication device including an authentication control device that performs human authentication;
It is characterized by comprising a locking device that is interlocked with the blood flow authentication device, is attached to a door or a wall adjacent to the door, and has a locking means for locking with the corresponding door or the wall adjacent to the door. Entry/exit control device.

Images