# US 2019/0167173 A1 · Fatigue degree determination device, and fatigue degree determination method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167173 A1 - Document ID: US20190167173A1 - Status: Published application - Kind: A1 - Application number: 16/270,794 - Filed: 2019-02-08 - Published: 2019-06-06 - Earliest claimed: 2016-08-12 - Assignees: Omron Healthcare Co., Ltd.; Osaka City University - Applicants: OMRON HEALTHCARE Co., Ltd.; Osaka City University - Inventors: Kenji FUJII; Shingo YAMASHITA; Yasuyoshi WATANABE; Kei MIZUNO - Web page: https://patentgrep.com/patent/US20190167173A1 ## CPC - A61B 5/165: {Evaluating the state of mind, e.g. depression, anxiety} - A61B 5/024: Measuring pulse rate or heart rate - A61B 5/02405: {Determining heart rate variability} - A61B 5/0245: by using sensing means generating electric signals, {i.e. ECG signals} - A61B 5/16: Devices for psychotechnics (using teaching or educational appliances G09B1/00 - G09B7/00); Testing reaction times {; Devices for evaluating the psychological state} - A61B 5/18: for vehicle drivers {or machine operators} - A61B 5/4806: {Sleep evaluation (A61B5/4821 takes precedence; devices for inducing sleep A61M21/02)} - A61B 5/4809: {Sleep detection, i.e. determining whether a subject is asleep or not} - A61B 5/4812: {Detecting sleep stages or cycles} - A61B 5/681: {Wristwatch-type devices} - A61B 5/7278: {Artificial waveform generation or derivation, e.g. synthesizing signals from measured signals} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A fatigue degree determination device includes a fatigue degree determination unit. A first biological heart rate is acquired while a user is awake and at rest, based on a biological heart rate measured from the user. A second biological heart rate is acquired while the user is sleeping, based on the biological heart rate measured from the user. The fatigue degree determination unit determines a fatigue degree of the user, based on information read out from a storage medium, the first biological heart rate and the second biological heart rate. The storage medium stores the information in which a degree of change of one biological heart rate relative to the other biological heart rate of a biological heart rate while a person is awake and at rest and a biological heart rate while the person is sleeping and a fatigue degree are associated with each other. ## Claims ### Claim 1 A fatigue degree determination device comprising: a first biological heart rate acquisition unit configured to acquire a first biological heart rate while a user is awake and at rest, based on a biological heart rate measured from the user; a second biological heart rate acquisition unit configured to acquire a second biological heart rate while the user is sleeping, based on the biological heart rate measured from the user, and a fatigue degree determination unit configured to determine a fatigue degree of the user, based on information read out from a storage medium, the first biological heart rate and the second biological heart rate, the storage medium storing the information in which a degree of change of one biological heart rate relative to the other biological heart rate of a biological heart rate while a person is awake and at rest and a biological heart rate while the person is sleeping and a fatigue degree are associated with each other. ### Claim 2 (depends on 1) The fatigue degree determination device according to claim 1, wherein the fatigue degree determination unit is configured to calculate a degree of change of one relative to the other of the first biological heart rate and the second biological heart rate and to determine a fatigue degree, which corresponds to the degree of change in the information, as the fatigue degree of the user. ### Claim 3 (depends on 1) The fatigue degree determination device according to claim 1, wherein the fatigue degree included in the information is an oxidative stress degree. ### Claim 4 (depends on 1) The fatigue degree determination device according to claim 1, wherein the first biological heart rate acquisition unit is configured to acquire the first biological heart rate on the basis of a biological heart rate measured from the user for a determination time period from a timing, at which the fatigue degree determination unit determines the fatigue degree of the user, to time before predetermined time, and wherein the second biological heart rate acquisition unit is configured to acquire the second biological heart rate on the basis of the biological heart rate measured from the user for the determination time period. ### Claim 5 (depends on 4) The fatigue degree determination device according to claim 4, wherein the predetermined time is 24 hours. ### Claim 6 (depends on 1) The fatigue degree determination device according to claim 1, further comprising an output unit configured to output information of the fatigue degree of the user determined by the fatigue degree determination unit to a display unit or a speaker, wherein the fatigue degree determination unit is configured to determine the fatigue degree of the user at predetermined timing. ### Claim 7 (depends on 1) The fatigue degree determination device according to claim 1, wherein the degree of change is a difference value obtained by subtracting the one biological heart rate from the other biological heart rate, and wherein the fatigue degree determination unit is configured to subtract one of the first biological heart rate and the second biological heart rate from the other and to determine a fatigue degree, which corresponds to a value obtained as a result of the subtraction in the information, as the fatigue degree of the user. ### Claim 8 (depends on 1) The fatigue degree determination device according to claim 1, wherein the degree of change is a value obtained by dividing a difference value, which is obtained by subtracting the one biological heart rate from the other biological heart rate, by the one biological heart rate or a value obtained by multiplying the value obtained as a result of the division by 100, and wherein the fatigue degree determination unit is configured to calculate a ratio of change of the biological heart rate of the user by dividing a difference value, which is obtained by subtracting one of the first biological heart rate and the second biological heart rate from the other, by the one or by dividing a difference value, which is obtained by subtracting one of the first biological heart rate and the second biological heart rate from the other, by the one and multiplying the value obtained as a result of the division by 100, and to determine a fatigue degree, which corresponds to the ratio of change in the information, as the fatigue degree of the user. ### Claim 9 (depends on 1) A biological information measurement device comprising: the fatigue degree determination device according to claim 1, and a measurement unit configured to measure a biological heart rate from the user, wherein the first biological heart rate acquisition unit is configured to acquire the first biological heart rate by generating the first biological heart rate from the biological heart rate measured by the measurement unit, and wherein the second biological heart rate acquisition unit is configured to acquire the second biological heart rate by generating the second biological heart rate from the biological heart rate measured by the measurement unit. ### Claim 10 A fatigue degree determination method comprising: a first biological heart rate acquisition step of acquiring a first biological heart rate while a user is awake and at rest, based on a biological heart rate measured from the user; a second biological heart rate acquisition step of acquiring a second biological heart rate while the user is sleeping, based on the biological heart rate measured from the user, and a fatigue degree determination step of determining a fatigue degree of the user, based on information read out from a storage medium, the first biological heart rate and the second biological heart rate, the storage medium storing the information in which a degree of change of one biological heart rate relative to the other biological heart rate of a biological heart rate while a person is awake and at rest and a biological heart rate while the person is sleeping and a fatigue degree are associated with each other. ### Claim 11 A non-transitory computer-readable storage medium, which stores a fatigue degree determination program configured to enable a computer to execute: a first biological heart rate acquisition step of acquiring a first biological heart rate while a user is awake and at rest, based on a biological heart rate measured from the user; a second biological heart rate acquisition step of acquiring a second biological heart rate while the user is sleeping, based on the biological heart rate measured from the user, and a fatigue degree determination step of determining a fatigue degree of the user, based on information read out from a storage medium, the first biological heart rate and the second biological heart rate, the storage medium storing the information in which a degree of change of one biological heart rate relative to the other biological heart rate of a biological heart rate while a person is awake and at rest and a biological heart rate while the person is sleeping and a fatigue degree are associated with each other.