WO2017109914A1 - Dispositif électronique et programme de détermination de fixation/séparation - Google Patents

Dispositif électronique et programme de détermination de fixation/séparation Download PDF

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Publication number
WO2017109914A1
WO2017109914A1 PCT/JP2015/086119 JP2015086119W WO2017109914A1 WO 2017109914 A1 WO2017109914 A1 WO 2017109914A1 JP 2015086119 W JP2015086119 W JP 2015086119W WO 2017109914 A1 WO2017109914 A1 WO 2017109914A1
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Prior art keywords
attachment
user
reflected light
value
detachment
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PCT/JP2015/086119
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English (en)
Japanese (ja)
Inventor
笠間　晃一朗
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富士通株式会社
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Priority to PCT/JP2015/086119 priority Critical patent/WO2017109914A1/fr
Publication of WO2017109914A1 publication Critical patent/WO2017109914A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/0245—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals

Definitions

  • Embodiments of the present invention relate to an electronic device and a detachment determination program.
  • an electronic device for measuring a pulse is attached to a subject (user) and the pulse rate of the user is measured.
  • This electronic device is used by being worn on a user's body, for example, like a wristwatch.
  • the electronic device performs a removal detection process based on the change value of the DC component of the sensor signal.
  • light is emitted with respect to a biological body (skin etc.), and a user's pulse rate is measured based on the change transition of the reflected light quantity of light.
  • JP 2015-16215 A Japanese Patent Laid-Open No. 2015-16216
  • the attachment / detachment of the electronic device from the body may be erroneously detected by external light from a light source such as a fluorescent lamp having a periodic wavelength different from that of the human body.
  • a light source such as a fluorescent lamp having a periodic wavelength different from that of the human body.
  • the electronic device even when the electronic device is removed from the body, it may be detected as a wearing state when light such as a fluorescent lamp that periodically flickers is detected in the same manner as the human body.
  • an object is to provide an electronic device and an attachment / detachment determination program that can accurately determine attachment / detachment in an electronic device that measures a pulse.
  • the electronic device includes a light emitting unit, a light receiving unit, a pulse calculating unit, and an attachment / detachment determining unit.
  • the pulse calculating unit calculates the user's pulse based on the change transition of the reflected light amount obtained by the light receiving unit receiving the reflected light of the light emitted from the light emitting unit.
  • the attachment / detachment determination unit determines attachment / detachment from the user based on a comparison result between the wave number or the extreme value included in the change transition of the reflected light amount within a predetermined time and a predetermined threshold.
  • attachment / detachment in an electronic device that measures a pulse can be accurately determined.
  • FIG. 1 is a block diagram illustrating a configuration example of an electronic device according to the embodiment.
  • FIG. 2 is an explanatory diagram for explaining the light emission condition table.
  • FIG. 3 is an explanatory diagram for explaining the attachment / detachment determination matrix.
  • FIG. 4 is an explanatory diagram illustrating the functional configuration of the control unit.
  • FIG. 5 is an explanatory diagram for explaining a detection case.
  • FIG. 6A is a graph for explaining the first detection case.
  • FIG. 6B is a graph for explaining the second detection case.
  • FIG. 6C is a graph for explaining the third detection case.
  • FIG. 6D is a graph for explaining the fourth detection case.
  • FIG. 6-5 is a graph for explaining the fifth detection case.
  • FIG. 6-6 is a graph for explaining the sixth detection case.
  • FIG. 6-7 is a graph for explaining the seventh detection case.
  • FIG. 7 is a flowchart illustrating an operation example of the electronic apparatus according to the embodiment.
  • FIG. 1 is a block diagram illustrating a configuration example of an electronic device 1 according to the embodiment.
  • An electronic device 1 illustrated in FIG. 1 is, for example, a computer worn by a user who measures a pulse in daily life.
  • the electronic device 1 is, for example, a wristwatch-type, batch-type, or tag-type terminal, and acquires data related to a user.
  • a user is a test subject who is a pulse measurement target, for example, an on-site worker, a patient undergoing rehabilitation, a training gym user, or the like.
  • the electronic device 1 transmits the acquired data to the external device 2. For example, the electronic device 1 transmits data related to the pulse measured when the user is worn to the external device 2. Further, the electronic device 1 determines whether the electronic device 1 is attached or detached from the user based on the measurement value obtained by the optical sensor 30, and transmits the determination result to the external device 2. Specifically, the electronic device 1 is in a mounted state when the user wears the electronic device 1, and a detached state when the user removes the electronic device 1, and is in either a worn state or a detached state. The attachment / detachment determination is performed. Then, the electronic device 1 transmits the determined attachment state or detachment state to the external device 2 as an attachment / detachment event.
  • the external device 2 can be a smartphone, personal computer, server device, or the like.
  • the external device 2 is a terminal device connected to the electronic device 1 through a BLE (Bluetooth (registered trademark) Low Energy) so as to be able to communicate with each other.
  • BLE Bluetooth (registered trademark) Low Energy
  • the output destination of the data acquired by the electronic device 1 is not limited to the external device 2.
  • it may be a display output to a display device (not shown) such as an LCD (Liquid Crystal Display) provided in the electronic apparatus 1.
  • the electronic device 1 includes a control unit 10, an LED 20 (Light Emitting Diode), an optical sensor 30, an acceleration sensor 40, a timer unit 50, a communication unit 60, and a storage unit 70.
  • a control unit 10 an LED 20 (Light Emitting Diode), an optical sensor 30, an acceleration sensor 40, a timer unit 50, a communication unit 60, and a storage unit 70.
  • Control unit 10 controls the operation of electronic device 1.
  • the control unit 10 is a hardware device such as a CPU (Central Processing Unit) or an MPU (Micro-Processing Unit), and the program 75 stored in the storage unit 70 is a work area of a RAM (Random Access Memory). And execute sequentially.
  • the control unit 10 may be realized by an integrated circuit such as ASIC (Application Specific Integrated Circuit) or FPGA (Field Programmable Gate Array).
  • the LED 20 is a light emitting unit that emits light to a living body such as a user's skin under the control of the control unit 10.
  • the optical sensor 30 is a light receiving unit that receives reflected light reflected by the user from the LED 20. A detection value indicating the amount of reflected light received by the optical sensor 30 is output to the control unit 10.
  • the amount of reflected light from the user obtained by receiving light by the optical sensor 30 changes in response to a change in blood flow caused by the pulsation of the user's blood, that is, a pulse wave indicating the user's pulse.
  • the control unit 10 can calculate the pulse rate of the user, for example, by analyzing the change transition of the reflected light amount that changes corresponding to the pulse wave.
  • the acceleration sensor 40 is a device that detects acceleration.
  • the acceleration sensor 40 is a three-axis acceleration sensor that detects accelerations in the three-axis directions of the X-axis direction, the Y-axis direction, and the Z-axis direction that are orthogonal to each other.
  • the acceleration sensor 40 outputs the detected acceleration data to the control unit 10.
  • any method such as a semiconductor method, a mechanical method, or an optical method can be adopted.
  • the acceleration sensor 40 is a triaxial acceleration sensor that measures acceleration in the triaxial direction, but may be a G (gravation) sensor that detects acceleration in the gravitational direction.
  • the timekeeping unit 50 is an RTC (Real Time Clock) or the like and measures time.
  • the time measuring unit 50 outputs time data indicating the time measured to the control unit 10.
  • the communication unit 60 is a communication device that performs wireless communication under a communication standard such as BLE or wireless LAN (Local Area Network) under the control of the control unit 10. For example, the communication unit 60 communicates with the external device 2 via BLE under the control of the control unit 10.
  • a communication standard such as BLE or wireless LAN (Local Area Network)
  • BLE Wireless Local Area Network
  • the storage unit 70 is realized by, for example, a semiconductor memory element such as a RAM or a flash memory, or a storage device such as an HDD (Hard Disk Drive).
  • the storage unit 70 stores various information such as data acquired from the optical sensor 30 and the acceleration sensor 40, time data measured by the time measuring unit 50, programs used for processing in the control unit 10, and setting data.
  • the storage unit 70 stores a light emission condition table 71, an attachment / detachment determination matrix 72, acquired data 73, a counter 74, and a program 75.
  • the light emission condition table 71 is a table showing the light emission conditions of the LED 20 at the time of pulse measurement. This light emission condition corresponds to the light emission amount of the LED 20 per unit time (for example, one light emission), and a combination of the current value of the LED 20 and the light emission time length per unit time (for example, one light emission). It is.
  • the current value of the LED 20 corresponds to the emission intensity. Accordingly, the product of the current value of the LED 20 and the light emission time length corresponds to the light emission amount of the LED 20 per time.
  • FIG. 2 is an explanatory diagram for explaining the light emission condition table 71.
  • the light emission condition table 71 indicates the current value and light emission time length of the LED 20 per measurement for each light emission condition that can be set by the LED 20 in the light emission condition numbers 1 to 24.
  • the current value has 4 steps in 5 mA increments in the range of 5 mA to 20 mA.
  • the light emission time length is in six stages in increments of 50 ⁇ sec in the range of 50 ⁇ sec to 300 ⁇ sec.
  • the light emission condition table 71 light emission condition numbers 1 to 24 in descending order of the amount of reflected light detected by the optical sensor 30 for the 24 light emission conditions in the combination of the four current values illustrated and the six light emission time lengths. Is attached and managed.
  • the attachment / detachment determination matrix 72 is data indicating the content of processing when determining attachment / detachment of the electronic device 1 from the user.
  • the attachment / detachment determination matrix 72 shows a determination result (attached state / detached state) when a predetermined case occurs in the amount of reflected light obtained by receiving light by the optical sensor 30.
  • FIG. 3 is an explanatory diagram for explaining the attachment / detachment determination matrix 72.
  • the attachment / detachment determination matrix 72 shows an occurrence state where a predetermined case has occurred and a determination result corresponding to each occurrence state.
  • the determination result is set to the mounted state
  • 50 bpm Beats Per Minute
  • first condition there is a case where 50 bpm or more continuously occurs for 3 seconds after a sudden change of a predetermined value or more occurs in 3 counts (3 seconds) (second condition).
  • the determination result is set to the disengaged state
  • 50 bpm or more does not continuously occur for 3 seconds
  • 50 bpm or more does not continuously occur for 3 seconds after the sudden change of a predetermined value or more occurs in 3 counts (3 seconds) (second condition).
  • the contents of the attachment / detachment determination matrix 72 illustrated in FIG. 3 is an example, and is not particularly limited to this example. For example, values such as bpm and duration may be set arbitrarily.
  • the acquired data 73 is data acquired by the control unit 10 from the optical sensor 30 and the acceleration sensor 40.
  • the control unit 10 stores the data acquired from the optical sensor 30 and the acceleration sensor 40 in the storage unit 70 as the acquired data 73 in chronological order.
  • control unit 10 causes the LED 20 to emit light, and the data (sensor value) about the reflected light amount obtained by receiving the reflected light reflected from the user by the optical sensor 30 is sequentially stored in the storage unit 70 as the acquired data 73. . Further, the control unit 10 sequentially stores acceleration data acquired from the acceleration sensor 40 in the storage unit 70 as acquired data 73.
  • the control unit 10 calculates, for example, the pulse rate of the user based on the acquired data 73 regarding the amount of reflected light stored in chronological order. Further, the control unit 10 acquires the user's exercise state such as the user's exercise intensity, the number of steps per unit time, and the amount of change in the number of steps based on the acquired data 73 regarding the acceleration stored in time series.
  • the counter 74 is a counter that holds various accumulated values.
  • the counter 74 holds a value such as a flag used in the processing.
  • the counter 74 may hold a cumulative value for the driving time required for the light emission of the LED 20.
  • the counter 74 may hold a cumulative number of steps obtained by counting the number of steps of the user.
  • the program 75 is program data executed by the control unit 10.
  • the control unit 10 implements various functions by developing the program 75 in the RAM work area and sequentially executing the program 75.
  • FIG. 4 is an explanatory diagram illustrating the functional configuration of the control unit 10. As illustrated in FIG. 4, the control unit 10 sequentially executes a program 75, whereby a pulse wave detection unit 101, a motion detection unit 102, an algorithm control unit 103, a sensor control unit 104, an attachment / detachment detection unit 105, and an application unit 106. Also, a function as the notification unit 107 is provided.
  • the pulse wave detection unit 101 performs various processes on the data acquired by the optical sensor 30. Specifically, the pulse wave detection unit 101 performs a process of storing data (sensor value indicating the amount of reflected light) acquired from the optical sensor 30 in the storage unit 70 as the counter 74 in time series.
  • the pulse wave detection unit 101 calculates (detects) the pulse rate of the user by analyzing the change of the reflected light amount based on the counter 74 for the reflected light amount stored in chronological order. For example, the algorithm control unit 103 calculates the pulse rate by converting the peak time interval into a unit time, for example, a value per minute, from the change in the amount of reflected light. The pulse wave detection unit 101 notifies the sensor control unit 104 of the calculated pulse rate.
  • the pulse wave detection unit 101 compares the wave number or extreme value included in the change transition of the reflected light amount within a predetermined time (for example, about 3 seconds) with a predetermined threshold value, and is in a state where the reflected light amount is generated ( Case) is detected.
  • the pulse wave detection unit 101 notifies the sensor control unit 104 of the detected case (hereinafter referred to as detection case).
  • FIG. 5 is an explanatory diagram for explaining a detection case.
  • the first detection case is a case where the sensor value of the optical sensor 30 is within a certain value range for a certain period of time.
  • the second detection case is a case where the sensor value of the optical sensor 30 is greater than or equal to a certain value.
  • the third detection case is a case where the sensor value of the optical sensor 30 is less than a certain value.
  • the fourth detection case is a case where there is a steep increase in sensor value for a certain time or more.
  • the fifth detection case is a case where there is a steep decrease in the sensor value over a certain time.
  • the sixth detection case is a case where the amplitude value of the sensor value that changes at a predetermined frequency (a predetermined wave number at a predetermined time) is equal to or greater than a predetermined value.
  • the seventh detection case is a case where the amplitude value of the sensor value that changes at a predetermined frequency is less than a certain value.
  • Fig. 6-1 is a graph for explaining the first detection case.
  • the pulse wave detector 101 presets a constant value range H1 as an upper limit value PS2 and a lower limit value PS1.
  • the pulse wave detection unit 101 obtains the maximum value and the minimum value of the sensor value PS in the time frame T having a certain time (for example, about 3 seconds) as a frame.
  • the pulse wave detection unit 101 determines that the condition of the first detection case has been achieved when the obtained maximum value and minimum value are between the upper limit value PS2 and the lower limit value PS1.
  • FIG. 6-2 is a graph for explaining the second detection case.
  • the pulse wave detecting unit 101 sets a lower limit threshold TH1 in advance.
  • the pulse wave detection unit 101 obtains the minimum value of the sensor value PS in the time frame T having a certain time frame.
  • the pulse wave detection unit 101 determines that the condition of the second detection case is achieved when the minimum value is equal to or greater than the threshold value TH1.
  • FIG. 6-3 is a graph for explaining the third detection case.
  • the pulse wave detection unit 101 sets an upper limit threshold TH2 in advance.
  • the pulse wave detection unit 101 obtains the maximum value of the sensor value PS in the time frame T with a certain time frame. Next, when the maximum value is less than the threshold value TH2, the pulse wave detection unit 101 determines that the condition of the third detection case has been achieved.
  • FIG. 6-4 is a graph for explaining the fourth detection case.
  • the pulse wave detection unit 101 has a threshold value for the difference between the maximum value and the minimum value (corresponding to the range H2), and a threshold value for the difference between the occurrence times of the maximum value and the minimum value (corresponding to the time frame T). ) Is set in advance.
  • the pulse wave detection unit 101 obtains the maximum value and the minimum value of the sensor value PS and the respective times in the time frame T having a certain time frame.
  • the pulse wave detection unit 101 performs the fourth operation when the time difference is less than the threshold value and the difference between the minimum value and the maximum value is greater than or equal to the threshold value. It is determined that the condition of the detection case is achieved.
  • FIG. 6-5 is a graph for explaining the fifth detection case.
  • the pulse wave detection unit 101 has a threshold value for the difference between the maximum value and the minimum value (corresponding to the range H2), and a threshold value for the difference between the occurrence time of the maximum value and the minimum value (corresponding to the time frame T). ) Is set in advance.
  • the pulse wave detection unit 101 obtains the maximum value and the minimum value of the sensor value PS and the respective times in the time frame T having a certain time frame. Next, if there is a minimum time after the maximum time, the pulse wave detection unit 101 determines that the fifth difference is less than the threshold and the difference between the maximum and minimum values is equal to or greater than the threshold. It is determined that the condition of the detection case is achieved.
  • Fig. 6-6 is a graph for explaining the sixth detection case.
  • the pulse wave detection unit 101 presets a threshold value (corresponding to the range H3) of the difference between the maximum value (K10 to K13) and the minimum value (K20 to K23).
  • the pulse wave detection unit 101 sets in advance a range (upper limit, lower limit) of the difference in generation time between the maximum value and the minimum value adjacent to each other.
  • the local maximum value and the local minimum value adjacent to each other within the range of the occurrence time difference are the local maximum value and the local minimum value counted as the wave number of the pulse wave. Therefore, by setting the range (upper limit, lower limit) of the occurrence time difference, the frequency and wave number of the pulse wave are set to a predetermined range.
  • the pulse wave detection unit 101 obtains all of the maximum value (K10 to K13) and the minimum value (K20 to K23) of the sensor value PS and the respective times in the time frame T having a fixed time frame. Next, the pulse wave detection unit 101 deletes the local maximum value and the local minimum value in which each time difference between the local minimum value and the local maximum value is outside the range (upper limit, lower limit) of the occurrence time difference. In the example of FIG. 6-6, the pulse wave detection unit 101 deletes the minimum value K20 and the maximum value K11, and the minimum value K21 and the maximum value K12.
  • the pulse wave detection unit 101 has all the local maximum values (for example, K10, K13) and local minimum values (for example, K22, K23) after deletion, and the difference between the local maximum value and the local minimum value that are adjacent to each other is equal to or greater than the threshold value. In this case, it is determined that the condition of the sixth detection case has been achieved.
  • FIG. 6-7 is a graph for explaining the seventh detection case.
  • the pulse wave detection unit 101 presets a threshold value (corresponding to the range H3) between the minimum value (K10 to K13) and the maximum value (K20 to K23). Moreover, the pulse wave detection unit 101 sets in advance a range (upper limit, lower limit) of the difference in generation time between the maximum value and the minimum value adjacent to each other.
  • the pulse wave detection unit 101 obtains all of the maximum value (K10 to K13) and the minimum value (K20 to K23) of the sensor value PS and the respective times in the time frame T having a fixed time frame. Next, the pulse wave detection unit 101 deletes the local maximum value and the local minimum value in which each time difference between the local minimum value and the local maximum value is outside the range (upper limit, lower limit) of the occurrence time difference. In the example of FIG. 6-7, the pulse wave detection unit 101 deletes the minimum value K20 and the maximum value K11, and the minimum value K21 and the maximum value K12.
  • the pulse wave detection unit 101 has all the local maximum values after deletion (for example, K10, K13) and local minimum values (for example, K22, K23), and each difference between the local maximum value and the local minimum value is equal to or less than the threshold value, It is determined that the condition of the seventh detection case has been achieved.
  • each difference between the maximum value and the minimum value in the sensor value PS is a relatively small value. It becomes. Therefore, when the electronic device 1 is in the detached state, it is determined as the seventh detection case.
  • the optical sensor 30 detects a change in the amount of reflected light according to the blood flow, each difference between the maximum value and the minimum value in the sensor value PS is sufficiently large. Value. Therefore, when the electronic device 1 is in the mounted state, it is determined as the sixth detection case.
  • the motion detection unit 102 performs various processes on the acceleration data acquired by the acceleration sensor 40. Specifically, the motion detection unit 102 performs a process of storing the acceleration data acquired by the acceleration sensor 40 in the storage unit 70 as a counter 74 in time series order. In addition, the motion detection unit 102 detects whether or not an acceleration equal to or greater than a certain threshold has recently occurred based on the counter 74 for acceleration stored in chronological order. This detection result is input to the algorithm control unit 103. The algorithm control unit 103 notifies the sensor control unit 104 of a detection result regarding whether or not an acceleration of a certain threshold value or more has recently occurred, which is received from the motion detection unit 102.
  • the sensor control unit 104 performs a process of driving the LED 20 when measuring the pulse of the user. Specifically, the sensor control unit 104 causes the LED 20 to emit light with a predetermined light amount based on the counter 74 for the reflected light amount.
  • the sensor control unit 104 receives the measurement result (pulse rate) and the detection case measured by the pulse wave detection unit 101 by the light emission of the LED 20 from the pulse wave detection unit 101.
  • the sensor control unit 104 outputs the measurement result (pulse rate) received from the pulse wave detection unit 101 to the application unit 106.
  • the sensor control unit 104 inputs the detection case received from the pulse wave detection unit 101 and the acceleration detection result received from the algorithm control unit 103 to the attachment / detachment detection unit 105.
  • the sensor control unit 104 includes an attachment / detachment detection unit 105 that determines attachment / detachment of the electronic device 1 from the user, and outputs a determination result (attachment / detachment event) determined by the attachment / detachment detection unit 105 to the application unit 106.
  • the application unit 106 notifies the notification unit 107 of the attachment / detachment event received from the sensor control unit 104 and the measurement result (pulse rate).
  • the notification unit 107 performs processing related to notification (output) of attachment / detachment events and pulse rate. Specifically, the notification unit 107 transmits the attachment / detachment event and the measurement result (pulse rate) received from the application unit 106 to the external device 2 via the communication unit 60.
  • the attachment / detachment detection unit 105 determines attachment / detachment of the electronic device 1 from the user with reference to the attachment / detachment determination matrix 72 based on the detection case detected by the pulse wave detection unit 101. In addition, the attachment / detachment detection unit 105 executes the process related to the attachment / detachment determination of the electronic device 1 described above based on the acceleration detection result detected by the motion detection unit 102.
  • FIG. 7 is a flowchart illustrating an operation example of the electronic apparatus according to the embodiment.
  • the sensor control unit 104 drives the LED 20.
  • the pulse wave detection unit 101 stores the data (sensor value PS) acquired from the optical sensor 30 in the storage unit 70 as a counter 74 in time series order. Thereby, the sensor value PS for a certain period is always held as the counter 74 (S1).
  • the attachment / detachment detection unit 105 sets the flag in the counter 74 to “0” (initial value) (S2).
  • the sensor control unit 104 sequentially tries light emission conditions that can be set by the LED 20 and obtains the amount of reflected light detected by the optical sensor 30.
  • the sensor control unit 104 rearranges the light emission conditions by assigning the light emission condition numbers 1 to 24 in descending order of the amount of reflected light based on the amount of reflected light for each light emission condition.
  • a table 71 is generated (S3).
  • the attachment / detachment detection unit 105 determines whether the difference between the maximum value and the minimum value of the sensor value PS is less than a certain value based on the detection case detected by the pulse wave detection unit 101 (S4). . Specifically, the attachment / detachment detection unit 105 determines whether or not it is the first detection case.
  • the attachment / detachment detection unit 105 sets the flag in the counter 74 to “1” (S5), and advances the process to S6. . If the difference between the maximum value and the minimum value of the sensor value PS is not less than a certain value (S4: NO), the attachment / detachment detection unit 105 skips S5 and proceeds to S6.
  • the attachment / detachment detection unit 105 determines whether or not removal and attachment / detachment have been determined even once, that is, whether or not this is the first process in which a determination result of the separation state or attachment / detachment state has not been obtained.
  • Detachment / detachment is determined even once (S6: NO), the attachment / detachment detection unit 105 advances the process to S10.
  • the attachment / detachment detection unit 105 causes a change corresponding to the pulse to occur in the change in the amount of reflected light based on the detection case of the pulse wave detection unit 101. It is determined whether or not (S7). Specifically, the attachment / detachment detection unit 105 determines whether or not the change in the amount of reflected light corresponds to the first condition in the attachment / detachment determination matrix 72 and is the sixth detection case.
  • the attachment / detachment detection unit 105 determines the attachment state (S8), and the process proceeds to S10. Proceed. If the change is a change other than the sixth detection case and the change corresponding to the pulse does not occur in the change in the amount of reflected light (S7: NO), the attachment / detachment detection unit 105 determines that it is in the detached state (S9). , The process proceeds to S10.
  • the attachment / detachment detection unit 105 determines whether or not it is in the detached state. When it is in the detached state (S10: YES), the attachment / detachment detection unit 105 determines whether or not an acceleration greater than a certain threshold has occurred based on the detection result of the acceleration detected by the motion detection unit 102 (S11). ). Thereby, in the detached state, the electronic device 1 detects a movement when the user wears the electronic device 1 based on whether or not acceleration is generated.
  • the attachment / detachment detection unit 105 determines whether or not there is a stop request such as ending pulse measurement (S12), and when there is no stop request (S12: NO). ), The process returns to S11. As a result, in the disengaged state, when an acceleration equal to or greater than a certain threshold is not generated and there is no stop request, the processing is waited.
  • the attachment / detachment detection unit 105 determines whether or not there is a stop request such as ending the pulse measurement (S13). .
  • a stop request such as ending the pulse measurement (S13).
  • the attachment / detachment detection unit 105 ends the attachment / detachment determination process.
  • the attachment / detachment detection unit 105 determines whether or not the flag held in the counter 74 is “1” (S14).
  • the sensor control unit 104 performs a process similar to S3. An attempt is made to recreate the light emission condition table 71. Specifically, the sensor control unit 104 sequentially tries the light emission conditions that can be set by the LED 20 to obtain the reflected light amount detected by the optical sensor 30. Next, the sensor control unit 104 rearranges the light emission conditions by assigning the light emission condition numbers 1 to 24 in descending order of the amount of reflected light based on the amount of reflected light for each light emission condition. A table 71 is generated (S15).
  • the attachment / detachment detection unit 105 determines whether or not there is a sudden change in the change in the amount of reflected light based on the detection case of the pulse wave detection unit 101. (S16). Specifically, the attachment / detachment detection unit 105 determines whether it is the fourth detection case or the fifth detection case.
  • the attachment / detachment detection unit 105 returns the process to S6 with the attachment state. Thereby, in the electronic device 1, when the amount of change per unit time in the magnitude of the amplitude included in the change transition of the reflected light amount is small, the wearing state is continued. Therefore, in the electronic device 1, since the wearing state is continued when the pulse gradually decreases, it is possible to prevent erroneous detection that causes the separation state.
  • the attachment / detachment detection unit 105 is based on the detection case of the pulse wave detection unit 101, and the change corresponding to the pulse is a change transition of the reflected light amount. It is determined whether or not it has occurred (S17). Specifically, it corresponds to the second condition in the attachment / detachment determination matrix 72, and the attachment / detachment detection unit 105 determines whether or not it is the sixth detection case.
  • the attachment / detachment detection unit 105 determines the attachment state (S18), and the process proceeds to S6. return. Further, if the change is a change other than the sixth detection case and the change corresponding to the pulse does not occur in the change in the amount of reflected light (S17: NO), the attachment / detachment detection unit 105 determines that it is in the detached state (S19). , The process returns to S6.
  • the electronic device 1 includes the LED 20, the optical sensor 30, the pulse wave detection unit 101, and the attachment / detachment detection unit 105.
  • the pulse wave detection unit 101 calculates the pulse of the user based on the change transition of the reflected light amount obtained by the optical sensor 30 receiving the reflected light of the light emitted from the LED 20 to the user.
  • the attachment / detachment detection unit 105 determines the user based on a comparison result (first to seventh cases) between the wave number or the extreme value included in the change transition of the reflected light amount within a predetermined time (time frame T) and a predetermined threshold. The attachment / detachment of the electronic device 1 is determined.
  • the electronic device 1 sets in advance a threshold value (for example, the sixth case) corresponding to the change transition of the reflected light amount according to the pulse for the wave number or the extreme value included in the change transition of the reflected light amount, Detachment can be accurately determined.
  • a threshold value for excluding external light such as a fluorescent lamp that flickers periodically, in which each difference between the maximum value and the minimum value in the change transition of the reflected light amount becomes a relatively small value, is set.
  • a threshold value for excluding external light such as a fluorescent lamp that flickers periodically, in which each difference between the maximum value and the minimum value in the change transition of the reflected light amount becomes a relatively small value.
  • the attachment / detachment detection unit 105 determines that the wearing state is present when the change amount per unit time of the amplitude included in the change transition of the reflected light amount is smaller than a predetermined value. Therefore, the electronic device 1 can perform the determination with high accuracy in the wearing state even when the pulse gradually decreases.
  • each component of the illustrated electronic device 1 does not necessarily need to be physically configured as illustrated.
  • the specific form of distribution / integration of each device is not limited to that shown in the figure, and all or a part thereof may be functionally or physically distributed or arbitrarily distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured.
  • control unit 10 may be executed entirely or arbitrarily on a CPU (or a microcomputer such as an MPU or MCU (Micro Controller Unit)).
  • various processing functions may be executed in whole or in any part on a program that is analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or hardware based on wired logic. Needless to say, it is good.
  • the program 75 may not be stored in the storage unit 70.
  • the program 75 stored in a storage medium readable by the control unit 10 may be read and executed.
  • the storage medium readable by the control unit 10 corresponds to, for example, a portable recording medium such as a CD-ROM or DVD disk, a USB (Universal Serial Bus) memory, a semiconductor memory such as a flash memory, a hard disk drive, or the like.
  • the program 75 may be stored in a device connected to a public line, the Internet, a LAN, or the like, and the control unit 10 may read and execute the program 75 therefrom.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Cardiology (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Physiology (AREA)
  • Biophysics (AREA)
  • Signal Processing (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

La présente invention concerne un dispositif électronique comportant une unité d'émission de lumière, une unité de réception de lumière, une unité de calcul de fréquence de pouls, et une unité de détermination de fixation/séparation. L'unité de calcul de fréquence de pouls calcule la fréquence du pouls d'un utilisateur, sur la base d'une variation des quantités de lumière réfléchie obtenue lorsque l'unité de réception de lumière reçoit la lumière réfléchie de la lumière émise par l'unité d'émission de lumière sur l'utilisateur. L'unité de détermination de fixation/séparation détermine la fixation et la séparation de l'utilisateur, sur la base des résultats d'une comparaison entre une valeur de seuil prédéfinie et un nombre d'ondes ou une valeur extrême incluse dans la variation de quantités de lumière réfléchie dans un temps prédéfini.
PCT/JP2015/086119 2015-12-24 2015-12-24 Dispositif électronique et programme de détermination de fixation/séparation WO2017109914A1 (fr)

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PCT/JP2015/086119 WO2017109914A1 (fr) 2015-12-24 2015-12-24 Dispositif électronique et programme de détermination de fixation/séparation

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003070757A (ja) * 2001-09-06 2003-03-11 Seiko Instruments Inc 脈拍計
JP2012170702A (ja) * 2011-02-23 2012-09-10 Seiko Epson Corp 拍動検出装置
WO2015004914A1 (fr) * 2013-07-12 2015-01-15 セイコーエプソン株式会社 Dispositif de détection d'informations biométriques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003070757A (ja) * 2001-09-06 2003-03-11 Seiko Instruments Inc 脈拍計
JP2012170702A (ja) * 2011-02-23 2012-09-10 Seiko Epson Corp 拍動検出装置
WO2015004914A1 (fr) * 2013-07-12 2015-01-15 セイコーエプソン株式会社 Dispositif de détection d'informations biométriques

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