JP7180659B2 - Judgment system, judgment method, and judgment program - Google Patents

Description

The present invention relates to a device and the like for identifying a living body based on information on the living body.

Information about the pulse wave of a living body is used in the techniques described in Patent Documents 1 to 3, for example.

Patent Literature 1 discloses a verification device that determines an operator based on the operator's fingerprint and the operator's pulse wave. The verification device determines whether or not the operator is the person himself/herself based on the fingerprint. When it is determined that the operator is the person himself/herself, the verification device determines whether or not the operator is alive based on the pulse wave, and if it is determined that the operator is alive, the operator is authenticated. It is determined that

Patent Literature 2 discloses an estimation device for estimating the state of blood vessels. The estimating device detects a pulse wave using an optical sensor, performs differentiation processing on the detected pulse wave, and calculates feature points related to the pulse wave based on the calculated result. The estimation device estimates the state of the blood vessel based on the difference in timing at which the feature points appear.

Patent Document 3 discloses an identification device that identifies a living body based on pulse wave information. The identification device creates an acceleration pulse wave representing acceleration when the pulse wave measured in the living body fluctuates, and identifies the living body based on the amplitude of the created acceleration pulse wave.

Further, Patent Document 4 discloses an identification device for personal identification based on waveform data of Korotkoff sounds. Patent Document 5 discloses a sphygmomanometer that determines whether the device itself is being used properly. The sphygmomanometer captures an image of the face of the measurement target and a cuff attached to the measurement target when an operation for starting blood pressure measurement of the measurement target is performed, and based on the captured image, the cuff is Calculate the position, the position of the face, the orientation of the cuff, and the orientation with respect to the face. The sphygmomanometer begins measuring blood pressure when the face is above the cuff and the face and the cuff are oriented in the same direction.

JP 2004-089675 A JP 2011-072674 A Japanese Patent Application Laid-Open No. 2006-218033 Japanese Patent Application Laid-Open No. 2010-110380 JP 2009-247733 A

A pulse wave measured in a living body is different for each living body. However, even if any of the devices disclosed in Patent Document 1 and Patent Document 2 are used, living bodies cannot be identified. This is because none of these devices has a function of identifying a living body based on pulse waves measured in the living body. Moreover, even if the identification device disclosed in Patent Document 3 is used, it is not always possible to correctly identify a living body. The reason for this is that the accelerated pulse wave used in the identification device is susceptible to noise contained in the pulse wave. Moreover, even if the identification device disclosed in Patent Document 4 is used, it is not always possible to correctly identify a living body.

SUMMARY OF THE INVENTION Accordingly, one of the objects of the present invention is to provide a specific device or the like capable of correctly identifying an identification target.

A determination system according to one aspect of the present invention includes a pulse wave acquiring unit that acquires a first pulse wave of a living body, a fingerprint acquiring unit that acquires fingerprint information of the living body during the period of acquiring the first pulse wave, A generation unit that generates the first information based on the acquired first pulse wave, the generated first information, and the second information based on the second pulse wave of the living body, the similarity indicating the degree of similarity a determination unit that determines whether or not a predetermined criterion is satisfied; an authentication unit that performs biometric authentication using the acquired fingerprint information; and a biometric identification result based on the determination result of the determination unit and the authentication result of the authentication unit. and an output unit that outputs the

Further, in another determination method of the present invention, the determination system acquires the first pulse wave of the living body, acquires the fingerprint information of the living body during the period of acquiring the first pulse wave, and obtains the acquired first pulse wave. First information based on one pulse wave is generated, and whether the degree of similarity indicating the degree of similarity between the generated first information and the second information based on the second pulse wave of the living body satisfies a predetermined criterion Then, biometric authentication is performed using the acquired fingerprint information, and a biometric identification result is output based on the determination result of the determination and the authentication result of the biometric authentication.

Further, as another aspect of the present invention, a determination program includes: a process of acquiring a first pulse wave of a living body; a process of acquiring fingerprint information of a living body during a period of acquiring the first pulse wave; The similarity indicating the degree of similarity between the process of generating the first information based on the first pulse wave obtained and the generated first information and the second information based on the second pulse wave of the living body is a predetermined A process of determining whether or not a criterion is satisfied, a process of performing biometric authentication using the acquired fingerprint information, and a process of outputting a biometric identification result based on the determination result and the authentication result of authentication. Realize it on a computer.

Furthermore, the same object is also achieved by a computer-readable recording medium recording such a program.

According to the identification device and the like according to the present invention, it is possible to correctly identify an identification target.

It is a block diagram showing the configuration of the specific device according to the first embodiment of the present invention. 4 is a flow chart showing the flow of processing in the specific device according to the first embodiment; FIG. 2 is a diagram conceptually showing an example of pulse wave information; 4 is a diagram conceptually showing an example of list information stored in a list information storage unit; FIG. FIG. 4 is a diagram conceptually showing an example of a spring mass damper model; It is a figure which represents notionally an example of factor information. It is a block diagram which shows the structure which the specific apparatus which concerns on the 2nd Embodiment of this invention has. 9 is a flow chart showing the flow of processing in a specific device according to the second embodiment; It is a figure which represents notionally an example of biometric information. FIG. 10 is a block diagram showing the configuration of a specific device according to the third embodiment of the invention. FIG. 13 is a flow chart showing the flow of processing in a specific device according to the third embodiment; FIG. 1 is a schematic diagram conceptually showing a blood vessel, a heart, and the like in a living body; FIG. FIG. 2 is a diagram conceptually showing an example of a pulse wave of a living body (or an identification target); It is a block diagram which shows the structure which the specific apparatus which concerns on the 4th Embodiment of this invention has. FIG. 14 is a flow chart showing the operation of a specific device according to the fourth embodiment; FIG. 1 is a block diagram schematically showing a hardware configuration example of a computing device capable of realizing a specific device according to each embodiment of the present invention; FIG.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
The configuration of the identification device 101 according to the first embodiment of the present invention will be described in detail with reference to FIG. FIG. 1 is a block diagram showing the configuration of the identification device 101 according to the first embodiment of the present invention.

The identification device 101 according to the first embodiment has a creation unit 102 and an information identification unit 103 .

It is assumed that the specific device 101 is communicably connected to the list information storage unit 150 . The specific device 101 may have a list information storage unit 150 .

In the list information storage unit 150 (illustrated in FIG. 4), the factor information (factor information 151, factor information 152, factor information 153, etc.) created by the creating unit 102 for the living body, and the living body can be uniquely identified. List information associated with identification information representing a unique identifier is stored. FIG. 4 is a diagram conceptually showing an example of list information stored in the list information storage unit 150. As shown in FIG. A method of creating factor information will be described later with reference to Equations 1 to 3 and the like.

In the list information illustrated in FIG. 4, for example, identification information "A" and factor information 151 are associated. This indicates that the factor information 151 is the factor information calculated based on the pulse wave information measured in the living body represented by the identification information “A”. The list information may further include different information and is not limited to the examples given above. Here, factor information calculated by the creation unit 102 will be described.

The factor information represents information created according to the processing described later with reference to FIG. 2 based on the pulse wave information representing the pulse wave of the living body. The factor information is, for example, information representing a change in the state of blood vessels in the living body, a change in the state of blood in the blood vessel, a change in the amount of blood flow, or a change in the state of blood flow. The factor information may be estimation information obtained by estimating these changes. Further, in the list information illustrated in FIG. 4, the factor information is expressed as information that changes continuously, but may be information that is expressed discretely. When the factor information is information that is discretely represented, the factor information is a value representing a state (or state change, etc.) at least one timing.

The factor information is, for example, vascular resistance that indicates the degree of obstruction of blood flow in blood vessels. Vascular resistance occurs, for example, in capillaries, peripheral blood vessels, and the like. Factor information is, for example, the amount of blood flowing through a blood vessel. Blood flow is caused by, for example, pumping blood from the heart. The factor information is, for example, blood viscosity (hereinafter referred to as “blood viscosity”). Blood viscosity varies depending on the amount of red blood cells contained in blood, the shape of blood cells, the viscosity of plasma, and the like. The factor information may be, for example, information representing the elasticity of blood vessels, or may be cardiac output representing the volume of blood pumped from the heart. The factor information is not limited to the above examples as long as it is information representing changes related to blood vessels or blood.

Next, pulse wave information will be described.

The pulse wave information is information representing the pulse wave of an identification target (or living body). The pulse wave information may be, for example, information representing a pulse wave measured during a period in which pressure is applied to a part of the identification target such as the arm or wrist (illustrated in FIG. 3(A)). , information representing a pulse wave measured during a period in which external pressure is not applied to the identification target (illustrated in FIG. 3B). Alternatively, the pulse wave information includes both a pulse wave measured during a period in which pressure is applied to a part of the living body and a pulse wave measured in a period in which no pressure is applied to the living body. good too.

FIG. 3A is a diagram conceptually showing an example of pulse wave information measured during a period in which pressure is applied to a part of the living body. And FIG. 3B is a diagram conceptually showing an example of pulse wave information measured during a period in which the external pressure is not applied. The horizontal axes of FIGS. 3A and 3B represent time, and the right side represents the passage of time. The vertical axes in FIGS. 3A and 3B represent the magnitude of the pulse wave, and represent that the pulse wave increases with increasing distance from the origin. Timings 31 to 37 shown in FIG. 3A and timings 41 to 43 shown in FIG. 3B will be described later in a fourth embodiment.

The pressure (external pressure) applied to the identification target (or living body) does not necessarily have to be constant, and may increase or decrease as time elapses, for example. Alternatively, the pressure may increase during the period up until the systolic pressure is measured and decrease after the systolic pressure is measured, as is found in many sphygmomanometers. The pressure may be controlled according to a predetermined pressure control procedure, and is not limited to the example described above.

Next, with reference to FIG. 2, processing in the identifying device 101 according to the first embodiment of the present invention will be described in detail. FIG. 2 is a flow chart showing the flow of processing in the identification device 101 according to the first embodiment.

The creation unit 102 receives pulse wave information (illustrated in FIG. 3) representing a pulse wave to be identified. The pulse wave information is, for example, information representing the pulse wave of the identification object in a certain period. The generating unit 102 generates the pulse according to biological model information (which will be described later with reference to formulas 1 and 2) in which the relationship between states of an identification target (or living body) is expressed using parameters at a plurality of timings. Factor information representing parameters that match the wave information is created (step S101).

The information specifying unit 103 determines whether the factor information in the list information and the factor information created by the creation unit 102, among the list information (illustrated in FIG. 4) stored in the list information storage unit 150, are determined according to a predetermined criterion (described later). to identify the list information that satisfies (step S102). The information specifying unit 103 specifies identification information representing an identifier included in the specified list information (illustrated in FIG. 4) (step S103).

The biological model information will be described with reference to Formula 1, Formula 2, and the like. Biological model information is a model that represents relationships between states of a biological body (or an identification target) at multiple timings. The biological model information is, for example, information representing the relationship between the state of the biological body at the first timing and the state of the biological body at the second timing. The state is, for example, intravascular pressure, which represents the magnitude of the intravascular pressure in a living body. The first timing and the second timing may be different. Hereinafter, for convenience of explanation, it is assumed that the state represents intravascular pressure. However, the state is not limited to the intravascular pressure, and may be, for example, information representing the magnitude of the pulse wave.

The biological model information is, for example, model information as exemplified by Equations 1 and 2.

X _t =(x _t , θ _t )=g(x _t−1 , θ _t )+v _t (Formula 1),
y _t =h(x _t )+w _t (Formula 2).

However, t represents timing. _xt represents the state of the living body (for example, intravascular pressure) at timing t. _yt represents measurement information (for example, pulse wave magnitude) measured on a living body. The measurement information may be pulse pressure. The measurement information is measured using, for example, a pressure sensor, a photoelectric sensor, an optical sensor, an ultrasonic sensor, a sonic sensor, an electric field sensor, a magnetic field sensor, an imaging device, or a vibration sensor. The parameter θ represents a parameter value used in the process of calculating the state at timing t from the state at timing (t−1). v _t represents the error for treatment g. _wt represents the error with respect to h.

The process g exemplified in Equation 1 conceptually represents, for example, the process of solving the differential equation exemplified in Equation 3 with respect to the variable x.

However, m represents the blood flow rate. k represents vascular resistance. c represents blood viscosity. F represents the force exerted on the vessel. Force F represents, for example, the force generated by the beating of the heart. Blood is pumped out of the heart as it beats, and a force F factor is produced by the pumped blood in a pulse wave. Assuming that the force with which the heart beats is an impulse input, it can be considered that the pulse wave represents an impulse response corresponding to the impulse input. x represents the intravascular pressure and corresponds to state x in Equation 1 (eg, x _t , x _t−1 , etc.).

The differential equation illustrated in Equation 3 can also be thought of as representing the motion of object m in the spring mass damper model illustrated in FIG. FIG. 5 is a diagram conceptually showing an example of a spring mass damper model.

The spring-mass damper model includes a damper portion c that represents the resisting force on the object m, a spring portion k that creates an oscillating motion of the object m, and an external force portion that represents the force F applied to the object m from the outside. I'm in. For example, an object m represented by a spring mass damper model moves upward in response to an upward external force F applied to the object m. When the object m moves upward, the length of the spring portion k becomes shorter than its natural length. As a result, a downward force acts on the object m by the spring portion k. In addition, a resistance force in the direction opposite to the direction in which the object m moves is generated on the object m by the damper portion c. The object m eventually starts moving downward due to the downward force applied by the spring portion k. As the object m moves downward, the length of the spring portion k becomes longer than its natural length. In this case, the spring part k applies an upward force to the object m. The object m eventually starts moving upward due to the upward force. If the external force F is not continuously applied to the object m, the object m vibrates in the longitudinal direction due to the spring portion k. However, a resistance force is applied to the object m by the damper portion c in the direction opposite to the direction in which the object m moves. Therefore, the object m vibrates in the vertical direction while reducing the width of the vibration in the vertical direction.

By discretizing the differential equation illustrated in Equation 3 with respect to time, information (illustrated in Equation 1) representing the relationship of intravascular pressure (an example of state) at multiple timings is obtained. Discretization is performed, for example, by dividing time into constant time intervals. The process g exemplified in Equation 1 represents a process of obtaining the intravascular pressure (an example of the state) at the second timing from the intravascular pressure (an example of the state) at the first timing according to the relationship. , is information conceptually representing the process of solving the differential equation exemplified in Equation 3 according to a processing procedure such as an implicit method. In this case, the parameter θ in Equation 1 is the blood flow m, blood resistance k, and blood viscosity c in Equation 3.

Further, the processing h exemplified in Equation 2 is information representing the relationship between the solution of the differential equation (Equation 3) (eg, intravascular pressure at timing t) and measurement information (eg, pulse wave magnitude). be.

In step S101 shown in FIG. 2, the creating unit 102 reduces the error between the information (y _t ) calculated according to the processing shown in, for example, Equations 1 and 2 and the actually measured measurement information. In order to do so, the value of the parameter θ is calculated according to the model estimation process obtained for each timing according to a technique such as data assimilation. The factor information is, for example, at least one of the parameters calculated according to the model estimation process. Alternatively, the creation unit 102 may estimate the value of the parameter θ according to a technique such as the method of least squares. Therefore, the process of estimating the value of the parameter θ by the generating unit 102 can also be said to be the process of generating factor information related to the pulse wave represented by the pulse wave information. The factor information in the list information illustrated in FIG. 4 is created, for example, by continuously connecting the values calculated at each timing with respect to one of the parameters θ.

According to the processing as described above, the creation unit 102 creates, for example, the factor information illustrated in FIG. FIG. 6 is a diagram conceptually showing an example of factor information. The horizontal axis of FIG. 6 represents time, and the more to the right, the more time elapses. The vertical axis in FIG. 6 represents the value represented by the factor information, and the higher the position, the larger the value of the factor information.

FIG. 6 illustrates, as factor information, blood flow information (curve 162) representing blood flow, vascular resistance information (curve 160) representing vascular resistance, and blood viscosity information (curve 161) representing blood viscosity. there is The blood flow information, blood vessel resistance information, and blood viscosity information are information representing the magnitude of the parameter θ calculated according to the processing shown in Equations 1 and 2 based on the pulse wave information. When the pulse wave represented by the pulse wave information (illustrated in FIG. 3) changes over time, the value of the factor information (illustrated in FIG. 6) also changes.

Also, the model information representing the intravascular pressure is not limited to the differential equation described in Equation 3. For example, in the pulse wave information (illustrated in FIG. 3), when a plurality of reflected waves corresponding to the ejected wave are measured, the model information is the spring mass damper model illustrated in FIG. 5 connected in series. It may be a differential equation representing a model

Next, the predetermined judgment criteria will be explained. The predetermined criterion may be a criterion regarding factor information (illustrated in FIG. 6) calculated with respect to at least one or more timings. The predetermined criterion is information representing a criterion for determining whether or not two pieces of information are similar (or match). The threshold is a positive value). The degree of similarity is assumed to be greater as the degree of similarity between two pieces of information is greater. Also, the degree of similarity approaches 0 as the degree of similarity between the two pieces of information decreases. Since various methods are known for calculating similarity between pieces of information, description of the method for calculating similarity is omitted.

A predetermined criterion may be, for example, a criterion based on the distance between two pieces of information. The distance approaches 0 as the degree of similarity between the two pieces of information increases. The smaller the similarity between the two pieces of information, the larger the distance. In this case, the predetermined criterion is, for example, that the distance for the two pieces of environment information is smaller than a threshold. The predetermined criteria are not limited to the examples described above.

The biological model information (exemplified in Equations 1 and 2) is not limited to the examples described above, and may be, for example, a predetermined function such as a polynomial, an exponential function, or a logarithmic function.

Next, effects of the identification device 101 according to the first embodiment of the present invention will be described.

The identification device 101 according to the first embodiment can correctly identify an identification target. The reason for this is that the identifying device 101 analyzes the cause of the pulse wave based on the biological model information.

Further, as will be described later in the fourth embodiment, by using a pulse wave measured during a period in which pressure controlled according to a predetermined pressure control procedure is applied, the identification target can be further correctly identified. can do. The reason for this is that the elasticity of blood vessels and the diameter of blood vessels differ from one living body to another, and by using the pulse wave of an identification target (living body) during a period in which pressure is applied, the elasticity or diameter of blood vessels can be improved. This is because the pulse wave containing the effect is measured. Moreover, according to the identification device 101 according to the first embodiment, since the living body is identified based on more information regarding the living body, a more robust authentication system can be constructed. In the case of pressure controlled according to a predetermined pressure control procedure, pulse wave information itself may be used as factor information, as will be described later in the fourth embodiment.

<Second embodiment>
Next, a second embodiment of the present invention based on the first embodiment described above will be described.

The configuration of the identification device 201 according to the second embodiment of the present invention will be described in detail with reference to FIG. FIG. 7 is a block diagram showing the configuration of the identification device 201 according to the second embodiment of the invention.

An identification device 201 according to the second embodiment has a creation unit 102 , an information identification unit 203 and a filter processing unit 202 .

The specific device 201 may be connected to the display unit 213 . The specific device 201 is communicably connected to the pulse wave measurement unit 211, the environment information acquisition unit 212, the list information storage unit 150, and the biological information storage unit 214. FIG. Alternatively, the identification device 201 may have a pulse wave measurement unit 211 , an environment information acquisition unit 212 , a list information storage unit 150 and a biological information storage unit 214 .

The pulse wave measurement unit 211 measures the pulse wave of the living body (or the object to be identified) and creates pulse wave information representing the measured pulse wave. Pulse wave measurement unit 211 is implemented using, for example, an acceleration sensor, a pressure sensor, a photoelectric sensor, an optical sensor, or an RGB (Red, Green, Blue) camera.

The list information storage unit 150 stores list information as described above with reference to FIG.

For example, the biometric information illustrated in FIG. 9 is stored in the biometric information storage unit 214 . FIG. 9 is a diagram conceptually showing an example of biometric information.

The biometric information represents information about the pulse wave of the biometric body. The biological information illustrated in FIG. 9 includes identification information representing an identifier, measurement date and time, water content information, pressurization information representing presence/absence of pressurization, heart rate, systolic blood pressure, diastolic blood pressure, medication information and the like. The identification information is information representing an identifier that can identify the living body. The date and time of measurement is the date and time when the pulse wave of the living body was measured. The water information is information representing the amount of water ingested by the living body before the measurement timing of measuring the pulse wave information and within a predetermined time from the measurement timing. The pressurization information is information indicating whether or not pressure was applied to the living body according to a predetermined pressure control procedure while the pulse wave of the living body was being measured. The heart rate is the heart rate of the living body near the measurement timing. The systolic blood pressure is the systolic blood pressure of the living body near the measurement timing. The lowest blood pressure is the lowest blood pressure of the living body near the measurement timing. The medication information is information indicating the type of medication taken by the living body before the measurement timing at which the pulse wave information was measured and within a predetermined time from the measurement timing. Therefore, biological information is information that includes information representing factors that affect the pulse wave of the biological body.

The biometric information illustrated in FIG. 9 includes biometric information associated with information shown in information 1 to information 8 below.

(Information 1) identification information "B",
(Information 2) Measurement date and time “2017/3/3 10:12”,
(Information 3) Moisture information “100”,
(Information 4) pressurization information “none”;
(Information 5) heart rate "63",
(Information 6) systolic blood pressure "120",
(Information 7) diastolic blood pressure "70",
(Information 8) Medication information “MB”.

The biological information indicates that the pulse wave was measured on the date and time "2017/3/3 10:12" for the living body represented by the identification information "B" during a period in which no pressure was applied to the living body. . The biological information also indicates that the biological body ingested the amount of water indicated by "100" and took the medicine indicated by "MB" when the pulse wave was measured. Further, the biological information includes that the heart rate of the living body is "63", the maximum blood pressure of the living body is "120", and the minimum blood pressure of the living body is "70" when the pulse wave is measured. represents that

The biometric information may include information different from the information 1 to information 8 described above (for example, height, weight, medical history, or genes). The biological information may include, for example, medical record information describing a doctor's diagnosis of the living body, or medical history information representing the history of diseases suffered by the living body. Also, the biometric information does not necessarily include all of the information exemplified by information 1 to information 8. FIG. Biometric information is not limited to the examples described above.

The pulse wave measurement unit 211 measures the pulse wave of an identification target (or living body) and creates pulse wave information representing the measured pulse wave. Pulse wave measurement unit 211 inputs the created pulse wave information to filter processing unit 202 .

Further, the environment information acquisition unit 212 measures the state of the identification target or the environment around the identification target while the pulse wave measuring unit 211 is measuring the pulse wave of the identification target. The environment information acquisition unit 212 is, for example, an acceleration sensor attached to the identification target, a sound collector installed around the identification target (or the identification target), an imaging device capturing an image of the living body, or It can be realized by an air pressure sensor (or a thermometer) or the like installed around the identification object. The environment information acquisition unit 212 may be a gyro sensor attached to the identification target. The environment information acquisition unit 212, for example, when implemented using a sound collector, collects sounds, sounds, and the like around the identification object whose pulse wave is being measured. The environment information acquisition unit 212 measures the acceleration generated in the identification target according to the movement of the identification target, for example, when implemented using an acceleration sensor. The environment information acquisition unit 212 measures the air pressure around the identification object, for example, when implemented using an air pressure sensor.

Environmental information is information that may affect the pulse wave of an identification target (or living body). For example, the pulse wave measured while the identification object is moving and the pulse wave measured while the identification object is stationary do not necessarily have the same waveform. Also, the pulse wave measured while the identification target is with a specific person (for example, a doctor) has the same waveform as the pulse wave measured while the identification target is alone. Not necessarily.

The environment information acquisition unit 212 creates environment information representing the acquired information, and inputs the created environment information to the information identification unit 203 . Alternatively, the environment information acquisition unit 212 may perform processing for removing the influence of the environment information from the pulse wave information created by the pulse wave measurement unit 211 .

Processing in the identification device 201 according to the second embodiment of the present invention will be described in detail with reference to FIG. FIG. 8 is a flow chart showing the flow of processing in the identification device 201 according to the second embodiment.

The filtering unit 202 receives pulse wave information representing a pulse wave to be identified. Filter processing unit 202 determines whether or not the pulse wave information includes information representing noise (for example, arrhythmia of the living body) (step S201). When filter processing unit 202 determines that the pulse wave information does not contain noise (NO in step S201), the process shown in step S202 is not executed. In this case, filtering section 202 inputs the pulse wave information to creating section 102 . When the filter processing unit 202 determines that the pulse wave information contains noise (YES in step S201), the filter processing unit 202 removes noise from the pulse wave information (step S202). The filtering unit 202 may further store in the biometric information storage unit 214 information in which the information representing the noise is associated with the identification information representing the identifier of the identification target in which the noise is detected. Alternatively, the filtering unit 202 may display information indicating that noise has been detected on the display unit 213 .

The creation unit 102 receives the pulse wave information and creates factor information (illustrated in FIG. 6) related to the pulse wave information by executing processing similar to the processing described with reference to FIG. 2 (step S101). ).

The information specifying unit 203 receives the factor information (illustrated in FIG. 6) created by the creating unit 102 . The information specifying unit 203 acquires at least one of the environment information created by the environment information acquisition unit 212 and the biometric information stored in the biometric information storage unit 214 .

The processing executed by the identification device 201 according to this embodiment will be described with reference to an example in which the information identification unit 203 acquires the environment information. In the list information storage unit 150, identification information related to an identifier representing a living body, factor information calculated based on pulse wave information related to the living body, and environmental information when the pulse wave information was measured are associated. and In the list information storage unit 150, the identification information may be further associated with biological information regarding the living body.

The information specifying unit 203 specifies, among the list information stored in the list information storage unit 150, list information that satisfies predetermined criteria for the received factor information and the received environment information (step S203).

In the processing shown in step S203, the information specifying unit 203 specifies, for example, the received environment information and the list information containing the environment information in which the environment information in the list information satisfies a predetermined criterion. The information specifying unit 203 further specifies list information (hereinafter referred to as “specific list information”) in which the received factor information and the factor information in the specified list information satisfy a predetermined criterion (step S203). The information specifying unit 203 specifies identification information representing an identifier included in the specific list information (step S204).

The information identifying unit 203 executes the same processing as the processing described above regarding the environmental information even when identifying the specific list information based on the biological information or the biological information and the environmental information. For example, the information specifying unit 203 specifies list information including biometric information in which the received biometric information and the biometric information in the list information satisfy a predetermined criterion, and further specifies in the specified list information Identify list information.

Next, effects of the identification device 201 according to the second embodiment of the present invention will be described.

The identification device 201 according to the second embodiment can correctly identify a living body. The reason for this is the same as the reason explained in the first embodiment.

Furthermore, according to the identification device 201 according to the second embodiment, individuals can be identified more accurately. The reason for this is that even in a situation where the pulse wave of the living body fluctuates according to the condition of the living body and the environment around the living body, the living body can be identified based on the data according to the situation or the environment. is.

In the example described above, the information identifying unit 203 identifies individuals based on the environmental information created by the environmental information acquiring unit 212 . When the extent to which the pulse wave changes according to environmental information (such as the extent to which the blood flow increases (or the extent to which the pulse wave changes) when the user is exercising) is known in advance, Information identifying section 203 may adjust the pulse wave measured by pulse wave measuring section 211 based on the environmental information. Similarly, when the extent to which the blood flow increases according to the measurement information (for example, the extent to which the blood flow increases (or the extent to which the pulse wave changes) when the air pressure changes) is known in advance Alternatively, the information identifying unit 203 may adjust the pulse wave measured by the pulse wave measuring unit 211 based on the environmental information.

<Third Embodiment>
Next, a third embodiment of the invention will be described.

The configuration of the identification device 301 according to the third embodiment of the present invention will be described in detail with reference to FIG. 10 . FIG. 10 is a block diagram showing the configuration of the identification device 301 according to the third embodiment of the invention.

An identification device 301 according to the third embodiment has a wave identification section 302 , a time difference calculation section 303 and an information identification section 304 .

The specific device 301 is communicably connected to the list information storage unit 305 . The specific device 301 may have a list information storage unit 305 .

The list information storage unit 305 stores list information in which identification information related to an identifier representing a living body and time difference information representing a time difference between a plurality of waves included in pulse waves measured in the living body are associated with each other. stored. Waves included in the pulse wave are, for example, an ejection wave and a reflected wave corresponding to the ejection wave. The ejected wave and reflected wave will be described with reference to FIG. FIG. 12 is a schematic diagram conceptually showing blood vessels, a heart, and the like in a living body.

A heart 351 is beating in a living body. The blood in the heart 351 is pumped out to the arteries connected to the heart 351 according to the pulsation of the heart 351 . Arteries are connected to each organ in the living body while repeating branches (branch 352, branch 353, branch 354, etc.). The blood pumped from the heart 351 eventually reaches each organ while passing through arteries. Disturbances in the flow of blood occur when blood collides with a blood vessel wall when passing through a bifurcation in an artery (hereinafter, referred to as "blood vessel bifurcation"). The intravascular pressure is changing as blood is pumped out of the heart 351 or as it hits the walls (or branches) of the blood vessels.

Blood vessel walls are usually soft. Thus, the walls of blood vessels (in this case, arteries) deform in response to changes in intravascular pressure. The pulse wave information (illustrated in FIG. 3) is created, for example, by measuring skin surface vibrations caused by deformation of blood vessel walls in a living body. A pulse wave will be described with reference to FIG. FIG. 13 is a diagram conceptually showing an example of a pulse wave of a living body (or an identification target). The horizontal axis in FIG. 13 represents time, and the more to the right, the more time elapses. The vertical axis in FIG. 13 represents the magnitude of the pulse wave, and the greater the distance from the origin, the greater the magnitude. A curve 361 conceptually represents a pulse wave measured by the heart 351 pumping blood once.

The waves in the period from timing 362 to timing 364 are waves in which vibrations formed by blood pumped from the heart 351 are measured. The wave in the period from time 362 to time 364 is called the "ejection wave." The waves in the period from timing 364 to timing 366 are, for example, waves in which changes in intravascular pressure caused by turbulent blood flow at vascular bifurcations are measured. The wave in the period from time 364 to time 366 is called the "reflected wave."

Blood vessel bifurcations exist, for example, in the abdominal aorta, the common iliac artery, and the like. A change in intravascular pressure that occurs at a blood vessel bifurcation reaches the measurement site as a wave through the blood, and the wave that arrives is measured as a reflected wave. Therefore, the timing at which the ejection wave is generated (or the timing 363 at which the amplitude of the ejection wave is maximized) and the timing at which the reflected wave generated in response to the ejection wave is generated (or the timing at which the amplitude of the reflected wave is maximized) is different from the timing 365 etc.). In addition, in the pulse wave, the number of reflected waves generated according to the ejection wave is not limited to one, but may be plural. Therefore, the time difference between the ejected wave and the reflected wave is determined according to, for example, the stiffness of the blood vessels in the living body, the distance from the heart 351 to the blood vessel branches, the distance between multiple blood vessel branches, and the like. The stiffness of blood vessels and their distances are generally different between different organisms. Therefore, the measured pulse wave is also different for each living body.

Next, with reference to FIG. 11, processing in the identifying device 301 according to the third embodiment of the present invention will be described in detail. FIG. 11 is a flow chart showing the flow of processing in the identification device 301 according to the third embodiment.

The wave identification unit 302 receives pulse wave information (illustrated in FIG. 13) representing a pulse wave to be identified. For convenience of explanation, the pulse wave information is assumed to be a pulse wave measured when the heart 351 pumps blood once. That is, pulse wave information includes one ejection wave and one or more reflected waves. When the pulse wave information represents a pulse wave measured when the heart 351 pumps blood multiple times, the wave identification unit 302 performs steps S301 to S301 on the pulse wave measured for each heartbeat. Processing described later is executed with reference to S304.

Pulse wave information may be represented, for example, using a predetermined function (eg, Fourier series), or may be represented by temporal changes in pulse wave magnitude. In addition, the pulse wave information may represent a feature amount representing the feature of the pulse wave. The feature quantity is, for example, the timing at which an inflection point occurs, the magnitude of the pulse wave at that timing, the timing at which the change in the pulse wave is minimal (or maximal), and the like. Pulse wave information is not limited to the examples described above.

The wave identifying unit 302 identifies an ejected wave and a reflected wave in the pulse wave represented by the received pulse wave information (illustrated in FIG. 13) (step S301). The wave identification unit 302 identifies, for example, a plurality of timings at which the pulse wave indicated by the pulse wave information begins to decrease (that is, the pulse wave reaches its maximum). The wave identification unit 302 identifies the magnitude of the amplitude at each timing, and identifies the wave at the timing 363 where the identified magnitude is the largest and appears first as the ejection wave. The wave identification unit 302 identifies, as a reflected wave, a wave at a timing 365 different from the timing 363 identified as the ejection wave among the identified timings.

The wave identification unit 302 may identify the plurality of timings by obtaining, for example, the timings (timings 362, 364, etc.) at which the pulse wave indicated by the pulse wave information (illustrated in FIG. 13) begins to increase. Alternatively, the wave identification unit 302 may identify the plurality of timings by obtaining the inflection point of the pulse wave. The process of specifying multiple timings is not limited to the above example.

Hereinafter, for convenience of explanation, it is assumed that the wave identifying unit 302 identifies an ejected wave and one reflected wave in the pulse wave represented by the pulse wave information.

The time difference calculator 303 calculates the time difference between the specified ejected wave and the reflected wave (step S302), and creates time difference information representing the calculated time difference. The time difference calculator 303 calculates the time difference by, for example, calculating the difference between the timings identified by the wave identifying unit 302 (for example, the timings 363 and 365 in FIG. 13). Alternatively, the time difference calculator 303 may calculate the difference based on a feature amount representing the characteristics of waves. The feature quantity is, for example, the timing at which the wave reaches its maximum, the timing at which the wave begins to increase, or the timing at the inflection point of the wave. The feature amount is not limited to the examples described above.

The information identifying unit 304 identifies a time difference between the time difference in the list information (illustrated in FIG. 10) and the time difference calculated by the time difference calculating unit 303 that satisfies a predetermined criterion (step S303). The information specifying unit 304 specifies identification information representing an identifier in the list information including the specified time difference (step S304). A predetermined criterion is, for example, the condition that the difference between the two time differences is less than a predetermined threshold. The predetermined criterion may be, for example, the condition that the ratio between the two time differences is within a predetermined range (eg, between 0.95 and 1.05). The condition is not limited to the above example, and may be any condition that indicates that the two time differences are the same (or similar).

For example, when the time difference calculated by the time difference calculation unit 303 is "1.52", the information specifying unit 304 compares the time difference in the list information (illustrated in FIG. 10) with the calculated time difference "1.52". specifies the time difference "1.52" (the first line of the list information in FIG. 10) for which satisfies a predetermined criterion. The information identifying unit 304 identifies identification information “A” associated with the identified time difference “1.52”.

Next, effects of the identification device 301 according to the third embodiment of the present invention will be described.

The identification device 301 according to the third embodiment can correctly identify a living body. The reason for this is that the time difference between the ejection wave and the reflected wave corresponding to the ejection wave is determined according to the length from the heart 351 to the blood vessel bifurcation, etc., and the specific device 301 determines the time difference. This is because the object to be identified is identified based on this. The length from the heart 351 to the branching of blood vessels is generally different for each living body and is information that is difficult to disguise. Since the identification device 301 identifies a living body based on information that is difficult to disguise, it is possible to provide information that is the basis for constructing an authentication system that is highly resistant to impersonation.

In the above example, the identification device 301 identifies the identification target based on the time difference between the ejected wave and the reflected wave, but may identify the identification target based on the time difference between a plurality of reflected waves. For example, when a pulse wave includes a plurality of reflected waves, the identification device 301 may identify the reflected waves according to the order of magnitude of amplitude. For example, when the pulse wave represented by the pulse wave information includes the first reflected wave to the fifth reflected wave, the identifying device 301 determines, for example, the time difference between the second reflected wave and the third reflected wave. Based on this, the identification target is identified by executing the same processing as the processing described with reference to FIG. As described above with respect to the relationship between ejected waves and reflected waves, the time difference between multiple reflected waves is determined by, for example, the distance between multiple vessel branches. Since these distances are information that is difficult to disguise, the specific device 301 can provide information that is the basis for constructing an authentication system that is highly resistant to impersonation.

Further, the identification device 301 identifies the living body based on a plurality of time differences (for example, the time difference between the ejected wave and the reflected wave, the time difference between the first reflected wave and the second reflected wave, etc.), further , can provide information that is the basis for constructing an authentication system that is highly resistant to impersonation.

<Fourth Embodiment>
Next, a fourth embodiment of the present invention based on each of the above-described embodiments will be described.

The configuration of the identification device 401 according to the fourth embodiment of the present invention will be described in detail with reference to FIG. 14 . FIG. 14 is a block diagram showing the configuration of the identification device 401 according to the fourth embodiment of the invention.

An identification device 401 according to the fourth embodiment has a pulse wave measurement section 410 , a cuff 411 and an information identification section 403 . The specific device 401 may have a creation unit 402 .

The specific device 401 is communicably connected to the list information storage unit 412 . The specific device 401 may have a list information storage unit 412 .

Control unit 404 controls pulse wave measurement unit 410 and pump 405 .

The cuff 411 can store gas such as air or liquid such as water inside. Cuff 411 is connected to pump 405 . The cuff 411 is attached to at least a part of the living body. Pump 405 injects gas (or liquid) into cuff 411 or expels gas (or liquid) stored in cuff 411 from cuff 411 . The controller 404 controls the operation of the pump 405 according to a predetermined pressure control procedure.

The predetermined pressure control procedure, for example, controls the pump 405 to inject gas (or liquid) into the cuff 411 until the internal pressure of the cuff 411 reaches a predetermined pressure, and when the internal pressure reaches or exceeds the predetermined pressure, The second step is to control the pump 405 to gradually discharge the gas (or liquid) stored in the cuff 411 . The predetermined pressure control procedure may be, for example, a control procedure that controls the internal pressure of the cuff 411 within a pressure range that allows detection of a pulse wave (that is, a pressure that is equal to or lower than the systolic blood pressure of the living body). The predetermined pressure control procedure may be, for example, a procedure of controlling pump 405 to change the internal pressure of cuff 411 periodically (or aperiodically) within the pressure range. The predetermined pressure control procedure may be, for example, a procedure for controlling pump 405 to change the internal pressure of cuff 411 periodically (or aperiodically) within a predetermined pressure range. Also, the predetermined pressure range may include a pressure equal to or higher than the systolic blood pressure of the living body, or may include a pressure within a range in which no pressure is applied to the living body. A predetermined pressure control procedure may be a procedure for controlling pump 405 to apply a constant pressure. That is, the predetermined pressure control procedure is not limited to the example described above.

In addition, the pulse wave measured while the cuff 411 is applying pressure to the part of the living body changes according to the magnitude of the pressure. For example, the pulse wave measured during the period when the pressure is applied (illustrated in FIG. 3(A)) is the pulse wave measured during the period when the pressure is not applied (illustrated in FIG. 3(B)) is different from

The pulse wave illustrated in FIG. 3A is a pulse measured by pulse wave measurement unit 410 during a period in which pump 405 is controlled so that the internal pressure of cuff 411 gradually increases in a predetermined pressure control procedure. is a wave. Referring to the pulse wave, the amplitude of the pulse wave increases as time passes. This indicates that as the pressure applied to the site by the cuff 411 increases, an external pressure is applied to the blood vessel, and the intravascular pressure increases in response to the external pressure applied. Referring to the pulse wave illustrated in FIG. 3B, it can be seen that the amplitude of the pulse wave is constant (or substantially constant). This indicates that no external pressure is applied to the blood vessel.

Further, referring to the pulse wave illustrated in FIG. 3A, it can be seen that the waveform of the pulse wave changes as external pressure is applied to the blood vessel (that is, as time elapses). Comparing the first pulse wave (from timing 31 to timing 33) and the second wave (from timing 33 to timing 37) in the pulse wave, it can be seen that in the first wave, the pulse wave is larger during the period from timing 32 to timing 33. On the other hand, in the second wave, there is a period from timing 34 to timing 37 during which the pulse wave magnitude increases (period from timing 35 to timing 36). Both of these periods represent the period from when the heart pumps blood into the blood vessel to when it next pumps blood. Therefore, it is considered that the difference in waveform between the first wave and the second wave is caused by, for example, the hardness of blood vessels.

On the other hand, referring to the pulse wave illustrated in FIG. 43), there is almost no change. This means that the pulse wave is measured with a constant (or substantially constant) waveform during a period in which no external pressure is applied to the blood vessel.

The list information storage unit 412 also stores list information in which identification information representing an identifier for identifying an individual (or an object of identification) is associated with information on the pulse wave measured for the individual. The information on the pulse wave is information on the pulse wave measured by the pulse wave measurement unit 410 while the internal pressure of the cuff 411 is being controlled according to a predetermined pressure control procedure. For convenience of explanation, it is assumed that the pulse wave information in the list information is information related to the pulse wave measured in advance before the processing described later with reference to FIG. 15 . However, if the individual is not specified based on the information on the pulse wave, list information in which the identification information representing the identifier of the individual and the information on the pulse wave are associated with each other is stored in the list information storage unit 412. good. Further, the information about the pulse wave may be the factor information as described in the first embodiment, or the time difference between the ejected wave and the reflected wave as described in the third embodiment. or information including environmental information, biological information, or the like. List information is not limited to the examples described above.

Further, the identification device 401 may have a blood pressure measurement unit (not shown) that measures the user's blood pressure (systolic blood pressure and diastolic blood pressure). In this case, the identifying device 401 can measure the user's blood pressure and identify the user in a single process.

The generating unit 402 includes the generating unit 102 according to the first embodiment (FIG. 1), the generating unit 102 according to the second embodiment (FIG. 7), or the wave specifying unit 302 according to the third embodiment, and , can be realized by a function similar to that of the time difference calculation unit 303 (FIG. 10). The information specifying unit 403 is the information specifying unit 103 according to the first embodiment (FIG. 1), the information specifying unit 203 according to the second embodiment (FIG. 7), or the information specifying unit according to the third embodiment. 304 (FIG. 10) can be implemented by the same function.

When the information about the pulse wave is the factor information, the creating unit 402 performs the first embodiment (or the second embodiment) between step S402 (described later with reference to FIG. 15) and step S403. form), the factor information is created by executing the same processing as the processing described above. In step S404, the information specifying unit 403 specifies identification information by executing the same processing as described above in the first embodiment (or the second embodiment). When the pulse wave information is time difference information representing a time difference, the identification information is specified based on the pulse wave information according to the processing (FIG. 11) described above in the third embodiment.

Hereinafter, for convenience of explanation, the pulse wave information is assumed to be pulse wave information.

Next, with reference to FIG. 15, the operation of the identifying device 401 according to the fourth embodiment of the present invention will be described in detail. FIG. 15 is a flow chart showing the operation of the identification device 401 according to the fourth embodiment.

The control unit 404 starts measuring the pulse wave of the living body and controlling the pressure according to a predetermined pressure control procedure (step S401). The control unit 404 controls the pulse wave measurement unit 410 to measure the pulse wave of the living body (or the object of identification), and further controls the pump 405 to control the internal pressure of the cuff 411 according to a predetermined pressure control procedure. That is, the control unit 404 controls the pulse wave measurement unit 410 to measure the pulse wave of the living body (or identification target) while the pump 405 is being controlled according to a predetermined pressure control procedure.

After that, the control unit 404 ends the measurement of the pulse wave of the living body and the pressure control according to the predetermined pressure control procedure (step S402).

Next, the information specifying unit 403 stores, in the list information storage unit 412, pulse wave information in which the pulse wave information in the list information and the pulse wave information representing the measured pulse wave satisfy predetermined criteria. specified from the list information provided (step S403). The information specifying unit 403 specifies identification information representing an identifier included in the list information related to the specified pulse wave information (step S404).

The specific device 401 may be a wearable device worn on the wrist. Further, the identification device 401 may be combined with a facial image-based authentication system or a fingerprint-based authentication system. Alternatively, the specific device 401 may be combined with an authentication system based on passwords registered in advance by the user. Password-based authentication systems represent systems that, for example, ask a user a question for which the user knows the answer and authenticate the user based on whether the answer is correct or not. The password may be one word or multiple words. An example of processing when the specific device 401 is used in combination with an authentication system based on passwords will be specifically described.

The user registers in the authentication system in advance, for example, information representing questions for which the user himself/herself knows the answer. When the user is authenticated by the authentication system, the user attaches the pulse wave measurement unit 410 of the specific device 401 to a predetermined site in advance and starts using the authentication system. Pulse wave measurement unit 410 starts measuring pulse waves according to the process described with reference to FIG. While the specific device 401 is measuring the pulse wave of the user, the authentication system displays the questions registered in the system to the user. The user enters the answer to the question into the authentication system. After the authentication system receives the answer, the pulse wave measurement unit 410 ends the operation of measuring the pulse wave. In the identification device 401, the information identification unit 403 identifies the identification information representing the identifier representing the user according to the processing shown in FIG. 15 etc. based on the pulse wave information representing the pulse wave measured by the pulse wave measurement unit 410 do. The authentication system determines whether the answers received are correct. The authentication system determines that the user is a true user when the answer is correct and the identifying device 401 identifies the identification information. The authentication system determines that the user is a fake user if the answer is incorrect or if the authentication system fails to identify the identity.

A system that combines the password-based authentication system and the specific device 401 can perform more robust authentication. The reason for this will be explained. Users can keep their composure if they know the password. In this case, the user's blood vessels do not contract in response to questions from the authentication system. Therefore, when the specific device 401 measures the user's pulse wave, it measures a pulse wave having a waveform similar to the pulse wave registered in the system. Determined to be the user. In contrast, users often cannot keep their composure when they do not know the password. In this case, the user's blood vessels constrict in response to questions posed by the authentication system. Therefore, when the identifying device 401 measures the user's pulse wave, it is unlikely that a pulse wave having a waveform similar to that registered in the system will be measured. As described in each of the above-described embodiments, the pulse wave measured by the user is different from the pulse wave measured by the true user, and furthermore, the user (in this case, Fake user) It is different from your own pulse wave. In this case, the identification device 401 neither identifies the identification information representing the identifier of the true user nor identifies the identification information representing the identifier of the false user. Since the identification device 401 does not identify the true user's identification information, the authentication system determines that the user is a fake user.

Alternatively, a system in which the lie detector and the identification device 401 are combined may be used. In this case, the identification device 401 measures the pulse wave for each question performed by the lie detector. The system determines that the answer to the question is false if the identification device 401 does not identify the identification information. Also, the system determines that the answer to the question is correct when the identifying device 401 identifies the identification information.

Next, effects of the identification device 401 according to the fourth embodiment of the present invention will be described.

According to the identification device 401 according to the fourth embodiment, it is possible to correctly identify a living body. The reason for this is the same as the reason explained in the first embodiment or the reason explained in the third embodiment.

Furthermore, according to the identifying device 401 according to the fourth embodiment, it is possible to provide information that is the basis for constructing a stronger authentication system. The reason for this is that the pulse wave measured while the external pressure is applied to the user's blood vessel and the pulse wave measured while the external pressure is not applied to the blood vessel have different waveforms. This is because the device 401 identifies the living body based on the two pulse waves.

Also, by controlling the pressure according to a predetermined pressure control procedure, it is possible to provide information that is the basis for constructing a more robust authentication system. This is because the waveform of the pulse wave measured by the user changes as the strength of the external pressure applied to the blood vessel changes according to the predetermined pressure control procedure. For example, when the pressure applied to the blood vessel is controlled according to the predetermined pressure control procedure, the information representing the hardness of the blood vessel appears more prominently in the pulse wave. It can provide information that is the basis for building a strong authentication system.

(Hardware configuration example)
A configuration example of hardware resources for realizing the specific device according to each of the embodiments of the present invention described above using one calculation processing device (information processing device, computer) will be described. However, such a specific device may be physically or functionally implemented using at least two computing devices. Also, such a specific device may be implemented as a dedicated device.

FIG. 16 is a block diagram schematically showing a hardware configuration example of a computing device capable of implementing the specific device according to each embodiment of the present invention. Calculation processing unit 20 includes central processing unit (Central_Processing_Unit, hereinafter referred to as “CPU”) 21 , memory 22 , disk 23 , nonvolatile recording medium 24 , and communication interface (hereinafter referred to as “communication IF”) 27 . have. The computing device 20 may be connectable to an input device 25 and an output device 26 . The calculation processing device 20 can transmit and receive information to and from other calculation processing devices and communication devices via the communication IF 27 .

The non-volatile recording medium 24 is a computer-readable compact disc (Compact_Disc) or a digital versatile disc (Digital_Versatile_Disc), for example. Also, the non-volatile recording medium 24 may be a universal serial bus memory (USB memory), a solid state drive (Solid_State_Drive), or the like. The non-volatile recording medium 24 retains such programs without supplying power, making it portable. The nonvolatile recording medium 24 is not limited to the media described above. Also, instead of the non-volatile recording medium 24, the program may be carried via the communication IF 27 and a communication network.

That is, the CPU 21 copies a software program (computer program: hereinafter simply referred to as "program") stored in the disk 23 to the memory 22 when executing it, and executes arithmetic processing. The CPU 21 reads data necessary for program execution from the memory 22 . When display is required, the CPU 21 displays the output result on the output device 26 . When inputting a program from the outside, the CPU 21 reads the program from the input device 25 . The CPU 21 corresponds to the functions represented by the units shown in FIGS. 1, 7, and 10 described above, or the functions (processes) represented by the creation unit 402, the information specifying unit 403, and the control unit 404 shown in FIG. interprets and executes a specific program (FIG. 2, FIG. 8, FIG. 11, or FIG. 15) in memory 22 of FIG. The CPU 21 sequentially executes the processing described in each embodiment of the present invention described above.

That is, in such a case, it can be considered that each embodiment of the present invention can also be realized by such a specific program. Further, each embodiment of the present invention can also be realized by a computer-readable non-volatile recording medium in which such a specific program is recorded.

The present invention has been described above using the above-described embodiments as exemplary examples. However, the invention is not limited to the embodiments described above. That is, within the scope of the present invention, various aspects that can be understood by those skilled in the art can be applied to the present invention.

101 identification device 102 creation unit 103 information identification unit 150 list information storage unit 31 timing 32 timing 33 timing 34 timing 35 timing 36 timing 37 timing 41 timing 42 timing 43 timing 151 factor information 152 factor information 153 factor information 160 curve 161 curve 162 curve 201 identification device 202 filter processing unit 203 information identification unit 211 pulse wave measurement unit 212 environmental information acquisition unit 213 display unit 214 biological information storage unit 301 identification device 302 wave identification unit 303 time difference calculation unit 304 information identification unit 305 list information storage unit 351 Heart 352 Branch 353 Branch 354 Branch 361 Curve 362 Timing 363 Timing 364 Timing 365 Timing 366 Timing 401 Identification device 402 Creation unit 403 Information identification unit 404 Control unit 405 Pump 410 Pulse wave measurement unit 411 Cuff 412 List information storage unit 20 Calculation processing unit 21 CPUs
22 memory 23 disk 24 nonvolatile recording medium 25 input device 26 output device 27 communication IF

Claims (8)

a pulse wave acquiring means for acquiring a first pulse wave of a living body to be authenticated ;
fingerprint acquisition means for acquiring fingerprint information of the living body during the period of acquiring the first pulse wave;
generating means for generating first information about blood flow in the living body during the acquisition period of the fingerprint information based on the acquired first pulse wave ;
The degree of similarity between the generated first information and the second information about the blood flow of the living body generated in advance based on the second pulse wave previously measured for the living body, Determination means for determining whether or not a predetermined threshold is exceeded;
authentication means for performing biometric authentication using the acquired fingerprint information;
output means for outputting the identification result of the living body based on the determination result of the determination means and the authentication result of the authentication means;
judgment system. 2. The determination system according to claim 1, further comprising specifying means for specifying the identification information whose degree of similarity satisfies a predetermined criterion by using list information including the second information and the identification information for identifying the living body. 3. The determination system according to claim 1, wherein said first information and said second information are information including at least one of blood flow rate, blood vessel resistance and blood viscosity of said living body. At least one of the first pulse wave and the second pulse wave is obtained during a period in which pressure is applied to the measuring point of the first pulse wave and the second pulse wave in the living body, The determination system according to any one of claims 1 to 3. 2. Filter means for determining whether or not noise is included in said first pulse wave and said second pulse wave, and removing said noise if it is determined that said noise is included. The determination system according to any one of claims 4 to 4. The first pulse wave and the second pulse wave contain information about the time difference between the waves measured at different positions of the living body,
6. The determination system according to any one of claims 1 to 5, wherein said determination means determines whether said degree of similarity satisfies a predetermined criterion using information about said time difference. the judgment system
Acquiring a first pulse wave of a living body to be authenticated ,
Acquiring fingerprint information of the living body during the period of acquiring the first pulse wave,
generating first information about the blood flow of the living body during the fingerprint information acquisition period based on the acquired first pulse wave ;
The degree of similarity between the generated first information and the second information about the blood flow of the living body generated in advance based on the second pulse wave previously measured for the living body, Determining whether or not a predetermined threshold is exceeded,
Performing biometric authentication using the acquired fingerprint information,
A determination method for outputting a biometric identification result based on a determination result of the determination and an authentication result of the biometric authentication. A process of acquiring a first pulse wave of a living body to be authenticated ;
A process of acquiring fingerprint information of the living body during the period of acquiring the first pulse wave;
a process of generating first information about the blood flow of the living body during the acquisition period of the fingerprint information based on the acquired first pulse wave ;
The degree of similarity between the generated first information and the second information about the blood flow of the living body generated in advance based on the second pulse wave previously measured for the living body, A process of determining whether or not a predetermined threshold is exceeded;
a process of performing biometric authentication using the acquired fingerprint information;
A process of outputting the identification result of the biometric based on the determination result of the determination and the authentication result of the biometric authentication;
Judgment program that realizes on a computer.

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