WO2018078871A1 - Electronic device and wearing/removal detection program - Google Patents

Electronic device and wearing/removal detection program Download PDF

Info

Publication number
WO2018078871A1
WO2018078871A1 PCT/JP2016/082314 JP2016082314W WO2018078871A1 WO 2018078871 A1 WO2018078871 A1 WO 2018078871A1 JP 2016082314 W JP2016082314 W JP 2016082314W WO 2018078871 A1 WO2018078871 A1 WO 2018078871A1
Authority
WO
WIPO (PCT)
Prior art keywords
electronic device
attachment
user
temperature
detachment
Prior art date
Application number
PCT/JP2016/082314
Other languages
French (fr)
Japanese (ja)
Inventor
笠間晃一朗
Original Assignee
富士通株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/JP2016/082314 priority Critical patent/WO2018078871A1/en
Publication of WO2018078871A1 publication Critical patent/WO2018078871A1/en

Links

Images

Classifications

    • 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

  • the present invention relates to an electronic device and a detachment detection program.
  • Such an electronic device is worn on a user's body as a wearable device, and can acquire a user's pulse, body temperature, blood pressure, position, and the like by various sensors.
  • the acquired information is used, for example, for various services such as a watching service and confirmation of worker safety.
  • Such an electronic device may be referred to as a vital sensing band, for example.
  • Examples of technologies related to such electronic devices include the following. In other words, when the measured temperature measured by the temperature sensor is equal to or higher than the temperature threshold, it is determined that the wristwatch is worn on the human body, and the operation of the ultraviolet sensor and the illuminance sensor is permitted. Otherwise, the operation of these sensors is prohibited. There are portable electronic devices.
  • LED LightLEDEmitting Diode
  • a technique for detecting whether or not a wristwatch is worn on a human body using a temperature sensor performs detection using the measured temperature measured by the temperature sensor as it is.
  • the measurement temperature may not be accurate due to a measurement error or the like. Therefore, in such a technique, even if the measured temperature is compared with the temperature threshold, if the measured temperature is not accurate, it may not be possible to accurately detect whether the wristwatch is attached to or detached from the human body.
  • an illuminance sensor may be used to determine whether or not the electronic device is worn on the user's body. Even in this case, it may be impossible to accurately detect the presence or absence of mounting. For example, in the case where an illuminance sensor is provided on the mounting surface side to be worn on the arm in the electronic device, if the user removes the electronic device from the arm, the illuminance sensor does not detect reflected light from the human body. Therefore, for example, when the amount of reflected light detected by the illuminance sensor is less than the threshold value, the electronic device can detect that the device has been removed from the arm. However, there are cases where the user removes the electronic device from his / her arm, turns the electronic device over, and directs the wearing surface toward sunlight. In this case, since the illuminance sensor directly captures sunlight, the amount of light detected by the illuminance sensor does not fall below the threshold value. Therefore, in this case, the electronic device erroneously detects that the device is attached.
  • one disclosure is to provide an electronic device and an attachment / detachment detection program that can accurately detect attachment / detachment to / from a user's body.
  • an electronic device detachable from a user's body, based on a temperature sensor that measures an external temperature, and a change amount per predetermined time of a measurement value measured by the temperature sensor,
  • An attachment / detachment determination processing unit for detecting occurrence of attachment / detachment of the electronic device.
  • an electronic device and an attachment / detachment detection program that can accurately detect attachment / detachment to / from the user's body.
  • FIG. 1 is a front view of an electronic device.
  • FIG. 2 is a front perspective view of the electronic apparatus.
  • FIG. 3 is a rear perspective view of the electronic device.
  • FIG. 4 is a cross-sectional view of the electronic device.
  • FIG. 5A to FIG. 5F are diagrams illustrating examples of temperature changes.
  • FIG. 6 is a graph showing an example of temperature change.
  • FIG. 7A is a graph showing an example of the change amount of the temperature change
  • FIG. 7B is a table showing an example of the attachment / detachment determination condition.
  • FIG. 8 is a graph showing an example of temperature change.
  • FIG. 9A is a graph showing an example of the change amount of the temperature change
  • FIG. 9B is a table showing an example of the attachment / detachment determination condition.
  • FIG. 10A is a graph showing an example of the change amount of the temperature change
  • FIG. 9B is a table showing an example of the attachment / detachment determination condition.
  • FIG. 11 is a diagram illustrating a configuration example of an electronic device.
  • FIG. 12 is a flowchart showing an operation example.
  • FIG. 13 is a flowchart showing an operation example.
  • FIG. 14 is a flowchart showing an operation example.
  • FIG. 15 is a diagram illustrating a hardware configuration example of an electronic device.
  • FIG. 16 is a diagram illustrating a configuration example of an electronic device.
  • FIG. 17 is a flowchart showing an operation example.
  • FIG. 18 is a diagram illustrating a hardware configuration example of an electronic device.
  • FIG. 19 is a diagram illustrating a configuration example of an electronic device.
  • FIG. 1 is a front view
  • FIG. 2 is a front perspective view
  • FIG. 3 is a rear perspective view.
  • the electronic device 100 is detachable from the user's body.
  • the electronic device 100 can be worn on the user's arm to acquire the user's biological information (or vital information).
  • the biological information includes, for example, information such as heart rate, respiratory rate, blood pressure, and body temperature.
  • the electronic device 100 may acquire information such as the position of the user and the moving speed.
  • the electronic device 100 may be referred to as a vital sensing band, for example.
  • the electronic device 100 may be referred to as a vital sensing unit (hereinafter also referred to as “sensing unit”) 100-A and a band attachment (hereinafter referred to as “band”). ) 100-B.
  • sensing unit a vital sensing unit
  • band attachment hereinafter referred to as “band”.
  • the sensing unit 100-A has various sensors inside. Biological information and the like can be acquired by various sensors.
  • FIG. 3 an example in which the temperature sensor 110 is provided is illustrated.
  • the temperature sensor 110 is provided on the surface (hereinafter, also referred to as “back surface”) of the sensing unit 100-A that contacts the user's body.
  • the band 100-B includes a protrusion 100-B1 and a plurality of holes 100-B2.
  • the user can fix the electronic device 100 to the arm by inserting the protrusion 100-B1 into the desired hole 100-B2.
  • FIG. 4 shows a cross-sectional view when the electronic device 100 is worn on the arm.
  • the temperature sensor 110 is provided on the back side of the electronic device 100, so that when the electronic device 100 comes into contact with the arm, the body temperature of the user can be detected.
  • the temperature sensor 110 may be provided not at the inside of the sensing unit 100-A but at a position in direct contact with the user's arm.
  • the position of the temperature sensor 110 may not be on the back side of the electronic device 100.
  • the electronic device 100 is made of a metal having a thermal conductivity of a predetermined value or more, or when such a metal is part of the back surface and is connected to the temperature sensor 110, the temperature sensor 110 is It may be arranged on the surface side opposite to the surface.
  • ⁇ Temperature change example before and after removal> 5A to 5F illustrate examples of temperature changes before and after attachment / detachment of the electronic device 100 to / from the arm.
  • the air temperature is Ta
  • the arm temperature or the arm surface temperature, or the user's body temperature; hereinafter referred to as “arm temperature”).
  • arm temperature Represents a temperature change example when Ta ⁇ Tb.
  • FIGS. 5D to 5F show examples of temperature changes when Ta> Tb.
  • thermodynamics When the electronic device 100 is attached to or detached from the arm, a temperature change occurs due to the heat balance between the electronic device 100 and the arm 200 and between the electronic device 100 and the air. At that time, heat is transferred from a low temperature to a high temperature according to the second law of thermodynamics.
  • the electronic device 100 is almost the same temperature as the air temperature Ta before mounting, but after mounting, heat from the arm 200 is transmitted to the electronic device 100 side, and the electronic device 100 The temperature changes from Ta to Tb (FIGS. 5A to 5B). After that, when the electronic device 100 is removed from the arm, heat is radiated to the outside, and the temperature of the electronic device 100 approaches Ta (FIG. 5C).
  • the temperature before and after the mounting of the electronic device 100 changes from a low temperature to a high temperature, or from a high temperature to a low temperature.
  • FIG. 6 is a graph showing an example of changes in measured values by the temperature sensor 110 before and after mounting.
  • the vertical axis represents the measured value T
  • the horizontal axis represents time t.
  • FIG. 6 shows an example in the case of Ta ⁇ Tb.
  • the measured value T of the temperature sensor 110 increases, and then the rate of increase becomes moderate and approaches the arm temperature Tb.
  • a state where the electronic device 100 is worn on the user's body may be referred to as a “wearing state”.
  • the measured value T measured by the temperature sensor 110 decreases, and then the rate of decrease decreases and approaches the air temperature Ta.
  • a state in which electronic device 100 is removed (or detached) from the user's body may be referred to as a “detached state”.
  • the terms “removal” and “removal” may be used interchangeably.
  • FIG. 7A is a graph showing the amount of change per predetermined time (or unit time) with respect to the measured value T in FIG.
  • the vertical axis represents the amount of change ( ⁇ T / ⁇ t) of the measured value T per predetermined time ⁇ t
  • the horizontal axis represents time t.
  • the change amount ( ⁇ T / ⁇ t) of the measured value T changes rapidly in the positive direction. This indicates that the amount of change in the measured value T at the moment when the electronic device 100 is worn on the arm is much larger than in other cases. Thereafter, the amount of change ( ⁇ T / ⁇ t) changes substantially constant. This indicates that the measured value T changes in the vicinity of the arm temperature Tb in the “wearing state”.
  • the direction changes in the negative direction.
  • T the measured value
  • the electronic device 100 touches air having a temperature lower than that of the arm.
  • the same transition is repeated, and the amount of change ( ⁇ T / ⁇ t) changes in the positive direction at the moment when it becomes “wearing state”, and changes in the negative direction at the moment when it becomes “detached state”.
  • Ta ⁇ Tb for example, when the change amount ( ⁇ T / ⁇ t) of the measurement value T per predetermined time ⁇ t is + A (or the first threshold value) or more, the electronic device 100 It can be determined that the electronic device 100 is attached to the user's body.
  • Ta ⁇ Tb for example, when the change amount ( ⁇ T / ⁇ t) of the measured value T per predetermined time ⁇ t is less than ⁇ B (or the second threshold value
  • FIG. 7B summarizes examples of such determination conditions in a table.
  • FIG. 8 is a graph showing an example of changes in measured values by the temperature sensor 110 before and after mounting.
  • the vertical axis represents the measured value T
  • the horizontal axis represents time t.
  • FIG. 8 is measured under the same conditions as in FIG. 6 except that Ta> Tb.
  • the measured value T decreases, and then the rate of decrease becomes gentle and approaches the arm temperature Tb.
  • the measured value T increases, and then the rate of increase becomes moderate and approaches the air temperature Ta.
  • FIG. 9A is a graph showing the amount of change ( ⁇ T / ⁇ t) per predetermined time ⁇ t with respect to the measured value T shown in FIG.
  • the graph shown in FIG. 9 (A) is opposite to that in FIG. 7 (A). That is, at the moment when the electronic device 100 is worn on the arm, the change amount ( ⁇ T / ⁇ t) of the measurement value T changes rapidly in the negative direction, and thereafter, the change amount ( ⁇ T / ⁇ t) changes substantially constant. On the other hand, at the moment when the electronic device 100 is removed from the arm, the change amount ( ⁇ T / ⁇ t) of the measurement value T changes in the positive direction, and thereafter changes substantially constant.
  • Ta> Tb for example, when the amount of change ( ⁇ T / ⁇ t) of the measured value T per predetermined time ⁇ t is less than ⁇ A (or the third threshold), The device 100 can determine that the electronic device 100 is attached to the user's body.
  • Ta> Tb for example, when the amount of change ( ⁇ T / ⁇ t) of the measured value T per predetermined time ⁇ t is + B (or the fourth threshold) or more, the electronic device 100 is the user. It can be determined that it has been removed from the body.
  • FIG. 9B summarizes examples of such determination conditions in a table.
  • FIG. 10 (A) shows a graph (for example, FIG. 7 (A) partially enlarged) of the change amount ( ⁇ T / ⁇ t) of the measured value T when Ta ⁇ Tb.
  • of the amount of change ( ⁇ T / ⁇ t) per predetermined time ⁇ t of the measured value T As described above, when Ta> Tb, the change amount ( ⁇ T / ⁇ t) greatly changes in the positive direction at the moment when the electronic device 100 is mounted. On the other hand, the amount of change ( ⁇ T / ⁇ t) greatly changes in the negative direction at the moment when the electronic device 100 is removed.
  • the absolute values are compared, as shown in FIG.
  • the absolute value of the change amount at the moment of attachment (for example,
  • of the amount of change is compared, the absolute value of the amount of change at the moment of mounting (for example,
  • the electronic device 100 can make the attachment / detachment determination based on the absolute value
  • the electronic device 100 can perform the attachment / detachment determination based on the change amount of the measurement value T.
  • the electronic device 100 can perform the attachment / detachment determination based on the change amount of the measurement value T.
  • a configuration example and an operation example of the electronic device 100 will be described.
  • FIG. 11 illustrates a configuration example of the electronic device 100.
  • FIG. 11 illustrates a configuration example in the sensing unit 100-A, for example.
  • the electronic device 100 includes a temperature sensor 110, a temperature sensor control unit 111, an attachment / detachment determination processing unit 120, a pulse sensor 130, and a wireless processing unit 140.
  • the temperature sensor 110 measures the temperature outside the electronic device 100 according to an instruction from the temperature sensor control unit 111, for example.
  • the temperature sensor 110 outputs the measured value T measured to the temperature sensor control unit 111.
  • the temperature sensor control unit 111 controls the temperature sensor 110. For example, the temperature sensor control unit 111 instructs the temperature sensor 110 to measure temperature, receives the measurement value T from the temperature sensor 110, and outputs the received measurement value to the attachment / detachment determination processing unit 120.
  • the attachment / detachment determination processing unit 120 receives the measurement value T from the temperature sensor control unit 111, and calculates a change amount ( ⁇ T / ⁇ t) per predetermined time ⁇ t from the received measurement value T.
  • the attachment / detachment determination processing unit 120 determines whether the electronic device 100 is attached to the user's body or whether the electronic device 100 is removed from the user's body based on the calculated change amount ( ⁇ T / ⁇ t). Determine. Details will be described in an operation example.
  • the pulse sensor 130 includes, for example, a light emitting element and a light receiving element.
  • the pulse can be measured by irradiating the arm with light emitted from the light emitting element and measuring the amount of reflected light with the light receiving element.
  • the light receiving element detects reflected light based on the characteristic of moglobin in blood that absorbs light.
  • the pulse sensor 130 receives the light emission current value of the light emitting element from the attachment / detachment determination processing unit 120 and causes the light emitting element to emit light based on the light emission current value.
  • the pulse sensor 130 outputs the measured pulse value to the attachment / detachment determination processing unit 120.
  • the light emitting element may be an LED
  • the light receiving element may be a PD (Photodiode).
  • the wireless processing unit 140 converts, for example, all or part of the attachment / detachment determination result, the measured value T of the temperature sensor 110, and the measured value of the pulse sensor 130 into a wireless signal, and transmits the converted wireless signal.
  • a transmission destination for example, there are a smartphone owned by a user, a personal computer that aggregates vital information and the like and provides various services.
  • FIG. 12 is a flowchart illustrating an operation example of attachment / detachment determination processing of the electronic device 100.
  • the example of FIG. 12 represents an example of attachment / detachment determination processing when Ta ⁇ Tb. It is mainly executed in the attachment / detachment determination processing unit 120.
  • the electronic device 100 When the electronic device 100 starts processing (S10), it determines whether or not there is a stop request (S11). For example, the electronic device 100 includes a stop button that stops execution of the attachment / detachment determination process, and the attachment / detachment determination processing unit 120 determines the presence / absence of a stop request based on a signal indicating the presence / absence of an operation output from the stop button. May be.
  • the electronic device 100 ends the attachment / detachment determination process (S12).
  • the electronic device 100 calculates the amount of change in the measured value of the temperature sensor 110 (“differential value” in FIG. 12) ( ⁇ T / ⁇ t) (S13).
  • the attachment / detachment determination processing unit 120 acquires a measurement value in a certain period measured by the temperature sensor 110 from the temperature sensor 110 via the temperature sensor control unit 111, and the change amount ( ⁇ T / ⁇ t from the acquired measurement value. ) Is calculated.
  • the electronic device 100 determines whether or not the amount of change ( ⁇ T / ⁇ t) is greater than or equal to + A (S14).
  • the electronic device 100 When the amount of change ( ⁇ T / ⁇ t) is greater than or equal to + A (Yes in S14), the electronic device 100 is worn on the user's body (hereinafter, worn (or worn)) (S15). And the electronic device 100 sets the light emission current with respect to LED for pulse detection to 22 mA (S16).
  • the attachment / detachment determination processing unit 120 compares the calculated change amount ( ⁇ T / ⁇ t) with the threshold value + A read from the internal memory, and when the change amount ( ⁇ T / ⁇ t) is greater than or equal to + A, judge. And the attachment / detachment determination processing unit 120 sets the light emission current of the LED in the pulse sensor 130 to 22 mA. In this case, the attachment / detachment determination processing unit 120 outputs the set light emission current value to the pulse sensor 130 and irradiates light from the LED with the current value. That is, the attachment / detachment determination processing unit 120 operates the pulse sensor 130 when it determines that it is “wearing”.
  • the numerical value of the light emission current value of 22 mA is an example, and any numerical value may be used as long as light can be emitted from the LED and can be detected by the PD.
  • electronic device 100 determines whether or not the amount of change ( ⁇ T / ⁇ t) is less than ⁇ B when the amount of change ( ⁇ T / ⁇ t) is not greater than + A (No in S14) or after the processing of S16 is completed. (S17).
  • the attachment / detachment determination processing unit 120 compares the calculated change amount ( ⁇ T / ⁇ t) with the threshold value ⁇ B read from the internal memory, and when the change amount ( ⁇ T / ⁇ t) is less than ⁇ B, Is determined. Then, the attachment / detachment determination processing unit 120 sets the light emission current for the LED in the pulse sensor 130 to 0 mA. The attachment / detachment determination processing unit 120 outputs a light emission current value indicating 0 mA to the pulse sensor 130 so that the pulse sensor 130 does not emit light from the LED. As a result, for example, the electronic device 100 can reduce power consumption.
  • the electronic device 100 shifts the process to S11 and repeats the above-described process.
  • FIG. 13 shows an operation example of the attachment / detachment determination process when Ta> Tb.
  • the determination process (S14, S17) is common except for Ta ⁇ Tb (for example, FIG. 12).
  • the electronic device 100 determines “arrived” (S15).
  • the electronic device 100 performs the process of S22.
  • electronic device 100 determines whether or not the calculated change amount ( ⁇ T / ⁇ t) is greater than or equal to + B.
  • the electronic device 100 determines “depart” (S18).
  • the electronic device 100 proceeds to S11 and repeats the above-described processing.
  • Such a determination is performed by, for example, the attachment / detachment determination processing unit 120.
  • FIG. 14 is a flowchart showing an operation example of the attachment / detachment determination process that can be detected in both cases of Ta> Tb and Ta ⁇ Tb.
  • This case is also common except that the determination process is different from the process in the case of Ta> Tb (for example, FIG. 12).
  • the electronic device 100 determines whether or not the absolute value
  • of the calculated change amount ( ⁇ T / ⁇ t) is equal to or greater than B and less than A (Yes in S24).
  • the electronic device 100 can determine attachment / detachment even when the user's body temperature and air temperature are higher.
  • FIG. 15 illustrates a hardware configuration example of the electronic device 100.
  • the electronic device 100 includes a temperature sensor 110, a pulse sensor 130, a ROM (Read Only Memory) 150, and a RAM (Random Access Memory) 151.
  • the electronic device 100 also includes a NAND flash memory (hereinafter also referred to as “NAND memory”) 152, a BLE (Bluetooth Low Energy) 153, and a processor 155.
  • NAND memory NAND flash memory
  • BLE Bluetooth Low Energy
  • the processor 155 reads out a program stored in the ROM 150, loads it into the RAM 151, and executes the loaded program, thereby executing the processes and functions of the temperature sensor control unit 111 and the attachment / detachment determination processing unit 120 described above. To do.
  • a program may be, for example, an attachment / detachment detection program.
  • the processor 155 corresponds to, for example, the temperature sensor control unit 111 and the attachment / detachment determination processing unit 120.
  • the NAND memory 152 is, for example, a non-volatile memory, and stores parameters used when various processes are executed in the processor 155 or the like.
  • the NAND memory 152 may hold threshold values (+ A, ⁇ B, ⁇ A, + B, etc.) used in the attachment / detachment determination process.
  • BLE153 is one of short-range wireless communication methods, for example, and performs wireless communication using a method specified as Bluetooth (registered trademark) 4.0 or the like.
  • the BLE 153 corresponds to the wireless processing unit 140, for example.
  • electronic device 100 detects the occurrence of attachment / detachment based on the amount of change ( ⁇ T / ⁇ t) per predetermined time ⁇ t of measurement value T measured by temperature sensor 110. ing. Therefore, the electronic device 100 absorbs the error by other measurement values even when an error occurs in the measurement value as compared with the case where the occurrence of attachment / detachment is detected by the single measurement value in the temperature sensor 110. This makes it possible to accurately determine whether the user is attached to or detached from the body.
  • the electronic device 100 detects the temperature change amount ( ⁇ T / ⁇ t), so that even when the user removes the electronic device 100 from the arm and turns it over, the attachment / detachment can be accurately detected. .
  • electronic device 100 is an example in which the number of steps of the user is further detected, and the attachment / detachment determination is not performed when the number of steps is detected. This is because, for example, when the user is walking, there is a possibility that the operation of attaching the electronic device 100 to the arm or removing the electronic device 100 attached to the arm is not performed.
  • FIG. 16 is a diagram illustrating a configuration example of the electronic device 100 according to the second embodiment.
  • the electronic device 100 further includes an acceleration sensor 160, an acceleration sensor control unit 161, and a pedometer processing unit 162.
  • the acceleration sensor 160 detects acceleration according to an instruction from the acceleration sensor control unit 161, for example.
  • the acceleration sensor 160 may detect acceleration using, for example, an optical method or a semiconductor method.
  • the acceleration sensor 160 outputs the detected measurement value to the acceleration sensor control unit 161.
  • the acceleration sensor control unit 161 instructs the acceleration sensor 160 to detect, and outputs the measurement value received from the acceleration sensor 160 to the pedometer processing unit 162.
  • the pedometer processing unit 162 counts the number of steps based on the measurement value received from the acceleration sensor control unit 161. For example, the pedometer processing unit 162 may count the number of steps by counting the number of times the measured value is equal to or greater than a threshold value. The pedometer processing unit 162 outputs the counted number of steps to the attachment / detachment determination processing unit 120.
  • the attachment / detachment determination processing unit 120 does not perform attachment / detachment determination based on the count value of the number of steps from the pedometer processing unit 162. The specific operation will be described below.
  • FIG. 17 is a flowchart showing an operation example of the attachment / detachment determination processing in the second embodiment.
  • FIG. 17 shows an operation example when Ta ⁇ Tb.
  • the electronic device 100 determines whether or not there is a step count when the change amount ( ⁇ T / ⁇ t) of the measured value is equal to or greater than the threshold value + A (Yes in S14) (S31). For example, when the amount of change ( ⁇ T / ⁇ t) is greater than or equal to + A, the attachment / detachment determination processing unit 120 determines whether or not a step count of “1” or more has been received from the pedometer processing unit 162.
  • the electronic device 100 does not perform the attachment / detachment determination when there is a step count (Yes in S31) (S32).
  • the attachment / detachment determination processing unit 120 does not perform attachment / detachment determination when receiving a step count of “1” or more from the pedometer processing unit 162.
  • the electronic device 100 determines “arrived” (S15). For example, if the attachment / detachment determination processing unit 120 does not receive the number of steps from the pedometer processing unit 162 or receives the number of steps of “0”, the attachment / detachment determination is performed to determine “arrived”.
  • the electronic device 100 determines whether or not there is a step count (S33). If there is a step count (Yes in S33), the electronic device 100 does not perform attachment / detachment determination (S34), and if there is no step count (No in S33), the electronic device 100 determines “arrived”.
  • the attachment / detachment determination processing unit 120 when the attachment / detachment determination processing unit 120 receives a step count of “1” or more from the pedometer processing unit 162, the attachment / detachment determination unit 120 does not perform the attachment / detachment determination and does not receive the step count, or “0” Is received, the attachment / detachment determination is performed and it is determined as “detachment”.
  • the electronic device 100 does not perform the attachment / detachment determination if there is a step count (Yes in S31 of FIG. 17, Yes in S33). (S32, S34). In addition, when there is no number of steps (No in S31, No in S33), the electronic device 100 performs attachment / detachment determination (S15 and S18 in FIG. 13). Such a determination process is the same as in FIG.
  • the attachment / detachment determination process (for example, FIG. 14) that can be detected even when Ta> Tb or Ta ⁇ Tb
  • the attachment / detachment determination is not performed ( S32, S34).
  • the electronic device 100 performs attachment / detachment determination (S15 and S18 in FIG. 14). Such a determination process is the same as in FIG.
  • FIG. 18 illustrates a hardware configuration example of the electronic device 100 according to the second embodiment.
  • the electronic device 100 further includes an acceleration sensor 160.
  • the processor 155 can read out a program stored in the ROM 150, load the program into the RAM 151, and execute the loaded program, thereby executing the above-described attachment / detachment determination process or the like.
  • the processor 155 corresponds to, for example, the temperature sensor control unit 111, the attachment / detachment determination processing unit 120, the acceleration sensor control unit 161, and the pedometer processing unit 162.
  • the electronic device 100 when the number of steps of the user who uses the electronic device 100 is detected by the acceleration sensor 160, the electronic device 100 does not detect the occurrence of attachment / detachment. Therefore, the operations of the temperature sensor 110 and the temperature sensor control unit 111 are stopped, and the attachment / detachment determination (for example, S15 and S18 in FIG. 17) in the attachment / detachment determination processing unit 120 may not be performed. Therefore, in the second embodiment, the power consumption of the electronic device 100 can be reduced as compared with the case where the attachment / detachment determination is performed regardless of the number of steps.
  • FIG. 19 is a diagram illustrating a configuration example of the electronic device 100 according to the third embodiment.
  • the electronic device 100 is detachable from the user's body.
  • the electronic device 100 includes a temperature sensor 110 and an attachment / detachment determination processing unit 120.
  • the temperature sensor 110 measures an external temperature.
  • the attachment / detachment determination processing unit 120 detects the occurrence of attachment / detachment based on the amount of change per predetermined time of the measurement value measured by the temperature sensor 110.
  • the electronic device 100 does not use the measurement value of the temperature sensor 110 as it is, but detects the occurrence of attachment / detachment based on the change amount of the measurement value per predetermined time. ing.
  • the amount of change is calculated together with other measurement values, so the error is absorbed in the amount of change and compared with the case where one measurement value is used as it is.
  • the occurrence of attachment / detachment can be accurately detected.
  • the attachment / detachment determination may be performed using the illuminance sensor.
  • the illuminance sensor directly receives sunlight, so that the attachment / detachment may be erroneously detected.
  • the electronic device 100 detects the occurrence of attachment / detachment based on the amount of change in the value measured by the temperature sensor 110. Therefore, for example, as shown in FIG. 6 and FIG. 7A, after the user removes the electronic device 100, when the mounting surface side is directed to sunlight, the same as when the mounting surface is not directed to sunlight. The measurement result was obtained. Therefore, for example, even when the user removes the electronic device 100 and then turns the mounting surface side of the electronic device 100 toward sunlight, it is possible to accurately detect the occurrence of attachment / detachment. .
  • thresholds having no relationship between + and ⁇ may be used, such as threshold values used in the case of Ta ⁇ Tb, such as + A and ⁇ B, and threshold values used in Ta> Tb of + C and ⁇ D.
  • the threshold values used when Ta ⁇ Tb and Ta> Tb are also + E (or the fifth threshold value) and + F (or the sixth threshold value), respectively, instead of + A and + B. Good.
  • such a threshold value may be held in a memory in the electronic device 100, for example, a NAND memory 152.
  • a processor or controller such as a CPU (Central Processing Unit), an MPU (Micro-Processing Unit), a DSP (Digital Signal Processor), or an FPGA (Field Programmable Gate Array) may be used. Good.
  • a CPU Central Processing Unit
  • MPU Micro-Processing Unit
  • DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • the electronic device 100 described above may include various sensors such as a speed sensor, a magnetic sensor, and a proximity sensor.
  • the electronic device 100 can be used for various services by transmitting the result of attachment / detachment determination in the attachment / detachment determination processing unit 120 and the measurement results of these sensors to the personal computer via the wireless processing unit 140. Is possible.
  • the electronic device 100 may be, for example, a wearable device that can be used with other functions such as a dedicated sensing band, transmission / reception of an e-mail, or a call, and can be worn on the user's body, or a wristwatch. .
  • SYMBOLS 100 Electronic device 100-A: Vital sensing unit 100-B: Band attachment 110: Temperature sensor 111: Temperature sensor control part 120: Detachment determination processing part 130: Pulse sensor 155: Processor 160: Acceleration sensor 162: Pedometer processing part

Abstract

This electronic device can be worn on and removed from the body of a user and is provided with a temperature sensor for measuring the external temperature and a wearing/removal determination processing unit for detecting if the electronic device is being worn or has been removed on the basis of the amount of change in the value measured by the temperature sensor per predetermined amount of time.

Description

電子機器、及び着脱検知プログラムElectronic device and attachment / detachment detection program
　本発明は、電子機器、及び着脱検知プログラムに関する。 The present invention relates to an electronic device and a detachment detection program.
　現在、利用者のバイタル情報（又は生体情報）を取得する電子機器が普及し始めている。例えば、このような電子機器は、ウェアラブル機器として、利用者の体に装着されて、種々のセンサにより、利用者の脈拍、体温、血圧、位置などを取得することが可能である。取得された情報は、例えば、見守りサービスや作業員の安否確認などの様々なサービスに利用される。このような電子機器は、例えば、バイタルセンシングバンドと称される場合もある。 Currently, electronic devices that acquire user vital information (or biological information) are beginning to spread. For example, such an electronic device is worn on a user's body as a wearable device, and can acquire a user's pulse, body temperature, blood pressure, position, and the like by various sensors. The acquired information is used, for example, for various services such as a watching service and confirmation of worker safety. Such an electronic device may be referred to as a vital sensing band, for example.
　このような電子機器に関する技術として、例えば、以下がある。すなわち、温度センサで測定された測定温度が温度閾値以上のとき腕時計が人体に装着されていると判断して紫外線センサと照度センサの動作を許可し、そうでないときはこれらのセンサの動作を禁止する携帯用電子機器がある。 Examples of technologies related to such electronic devices include the following. In other words, when the measured temperature measured by the temperature sensor is equal to or higher than the temperature threshold, it is determined that the wristwatch is worn on the human body, and the operation of the ultraviolet sensor and the illuminance sensor is permitted. Otherwise, the operation of these sensors is prohibited. There are portable electronic devices.
　この技術によれば、位置情報信号受信装置の無駄な動作を回避し、電力の浪費を抑制することができる携帯用電子機器を提供することができる、とされる。 According to this technique, it is possible to provide a portable electronic device that can avoid wasteful operation of the position information signal receiving device and suppress waste of power.
　また、血液中のヘモグロビンが光を吸収するという性質を利用し、腕の血管にＬＥＤ（Light Emitting Diode）光を照射して受光素子においてその反射光を検出することで、照度センサにより利用者の脈拍数を検出するようにした電子機器もある。 In addition, by utilizing the property that hemoglobin in blood absorbs light, LED (LightＬＥＤEmitting Diode) light is irradiated to the blood vessels of the arm, and the reflected light is detected by the light receiving element. Some electronic devices are designed to detect the pulse rate.
特開２００６－１９４６９７号公報JP 2006-194697 A
　しかし、温度センサを利用して腕時計が人体に装着されているか否かを検出する技術は、温度センサで測定された測定温度をそのまま用いて検出を行っている。この場合、例えば、測定誤差などにより測定温度が正確ではない場合もある。従って、かかる技術では、測定温度と温度閾値とを比較しても、測定温度が正確ではない場合、腕時計の人体に対する着脱を正確に検出することができない場合がある。 However, a technique for detecting whether or not a wristwatch is worn on a human body using a temperature sensor performs detection using the measured temperature measured by the temperature sensor as it is. In this case, for example, the measurement temperature may not be accurate due to a measurement error or the like. Therefore, in such a technique, even if the measured temperature is compared with the temperature threshold, if the measured temperature is not accurate, it may not be possible to accurately detect whether the wristwatch is attached to or detached from the human body.
　また、例えば、照度センサを利用して、電子機器の利用者の体への装着の有無を判断する場合がある。この場合においても正確に装着の有無を検出できない場合がある。例えば、電子機器において腕に装着する装着面側に照度センサが備えられている場合、利用者が電子機器を腕から取り外すと、照度センサは人体からの反射光を検出しなくなる。従って、例えば、照度センサで検出された反射光の光量が閾値より少なくなることで、電子機器は当該機器が腕から取り外されたことを検出できる。しかし、利用者が、電子機器を腕から取り外し、電子機器をひっくり返して、装着面側を太陽光に向ける場合がある。この場合、照度センサは太陽光を直接取り込むため、照度センサで検出される光量が閾値以下とならない。従って、この場合、電子機器では当該機器が装着された状態であると誤検出してしまう。 Also, for example, an illuminance sensor may be used to determine whether or not the electronic device is worn on the user's body. Even in this case, it may be impossible to accurately detect the presence or absence of mounting. For example, in the case where an illuminance sensor is provided on the mounting surface side to be worn on the arm in the electronic device, if the user removes the electronic device from the arm, the illuminance sensor does not detect reflected light from the human body. Therefore, for example, when the amount of reflected light detected by the illuminance sensor is less than the threshold value, the electronic device can detect that the device has been removed from the arm. However, there are cases where the user removes the electronic device from his / her arm, turns the electronic device over, and directs the wearing surface toward sunlight. In this case, since the illuminance sensor directly captures sunlight, the amount of light detected by the illuminance sensor does not fall below the threshold value. Therefore, in this case, the electronic device erroneously detects that the device is attached.
　そこで、一開示は、利用者の体に対する着脱を正確に検出できるようにした電子機器、及び着脱検知プログラムを提供することにある。 Therefore, one disclosure is to provide an electronic device and an attachment / detachment detection program that can accurately detect attachment / detachment to / from a user's body.
　一態様によれば、利用者の体に着脱可能な電子機器であって、外部の温度を測定する温度センサと、前記温度センサで測定された測定値の所定時間あたりの変化量に基づいて、前記電子機器の着脱の発生を検出する着脱判定処理部とを備える。 According to one aspect, an electronic device detachable from a user's body, based on a temperature sensor that measures an external temperature, and a change amount per predetermined time of a measurement value measured by the temperature sensor, An attachment / detachment determination processing unit for detecting occurrence of attachment / detachment of the electronic device.
　一開示によれば、利用者の体に対する着脱を正確に検出できるようにした電子機器、及び着脱検知プログラムを提供することができる。 According to one disclosure, it is possible to provide an electronic device and an attachment / detachment detection program that can accurately detect attachment / detachment to / from the user's body.
図１は電子機器の正面図である。FIG. 1 is a front view of an electronic device. 図２は電子機器の正面側斜視図である。FIG. 2 is a front perspective view of the electronic apparatus. 図３は電子機器の裏面側斜視図である。FIG. 3 is a rear perspective view of the electronic device. 図４は電子機器の断面図である。FIG. 4 is a cross-sectional view of the electronic device. 図５（Ａ）から図５（Ｆ）は温度変化の例を表す図である。FIG. 5A to FIG. 5F are diagrams illustrating examples of temperature changes. 図６は温度変化の例を表すグラフである。FIG. 6 is a graph showing an example of temperature change. 図７（Ａ）は温度変化の変化量の例を表すグラフ、図７（Ｂ）は着脱判定条件の例を表す表である。FIG. 7A is a graph showing an example of the change amount of the temperature change, and FIG. 7B is a table showing an example of the attachment / detachment determination condition. 図８は温度変化の例を表すグラフである。FIG. 8 is a graph showing an example of temperature change. 図９（Ａ）は温度変化の変化量の例を表すグラフ、図９（Ｂ）は着脱判定条件の例を表す表である。FIG. 9A is a graph showing an example of the change amount of the temperature change, and FIG. 9B is a table showing an example of the attachment / detachment determination condition. 図１０（Ａ）は温度変化の変化量の例を表すグラフ、図９（Ｂ）は着脱判定条件の例を表す表である。FIG. 10A is a graph showing an example of the change amount of the temperature change, and FIG. 9B is a table showing an example of the attachment / detachment determination condition. 図１１は電子機器の構成例を表す図である。FIG. 11 is a diagram illustrating a configuration example of an electronic device. 図１２は動作例を表すフローチャートである。FIG. 12 is a flowchart showing an operation example. 図１３は動作例を表すフローチャートである。FIG. 13 is a flowchart showing an operation example. 図１４は動作例を表すフローチャートである。FIG. 14 is a flowchart showing an operation example. 図１５は電子機器のハードウェア構成例を表す図である。FIG. 15 is a diagram illustrating a hardware configuration example of an electronic device. 図１６は電子機器の構成例を表す図である。FIG. 16 is a diagram illustrating a configuration example of an electronic device. 図１７は動作例を表すフローチャートである。FIG. 17 is a flowchart showing an operation example. 図１８は電子機器のハードウェア構成例を表す図である。FIG. 18 is a diagram illustrating a hardware configuration example of an electronic device. 図１９は電子機器の構成例を表す図である。FIG. 19 is a diagram illustrating a configuration example of an electronic device.
　以下、本実施の形態について図面を参照して詳細に説明する。本明細書における課題及び実施例は一例であり、本願の権利範囲を限定するものではない。特に、記載の表現が異なっていたとしても技術的に同等であれば、異なる表現であっても本願の技術を適用可能であり、権利範囲を限定するものではない。そして、各実施の形態は、処理内容を矛盾させない範囲で適宜組み合わせることが可能である。 Hereinafter, the present embodiment will be described in detail with reference to the drawings. Problems and examples in the present specification are merely examples, and do not limit the scope of rights of the present application. In particular, even if the described expressions are different, as long as they are technically equivalent, the techniques of the present application can be applied even if the expressions are different, and the scope of rights is not limited. Each embodiment can be combined as appropriate within a range that does not contradict processing contents.
　［第１の実施の形態］
　第１の実施の形態について説明する。最初に電子機器の外観例について説明する。 [First Embodiment]
A first embodiment will be described. First, an appearance example of an electronic device will be described.
　＜電子機器の外観＞
　図１から図３は電子機器１００の外観例を表している。このうち、図１は正面図、図２は正面側斜視図、図３は裏面側斜視図をそれぞれ表している。 <Appearance of electronic equipment>
1 to 3 show an example of the appearance of the electronic device 100. FIG. 1 is a front view, FIG. 2 is a front perspective view, and FIG. 3 is a rear perspective view.
　電子機器１００は利用者の体に着脱可能となっている。電子機器１００は、例えば、利用者の腕に装着されて、利用者の生体情報（又はバイタル情報）などを取得することが可能である。生体情報としては、例えば、心拍数や呼吸数、血圧、体温などの情報がある。それ以外にも、例えば、電子機器１００は、利用者の位置や移動速度などの情報を取得してもよい。電子機器１００は、例えば、バイタルセンシングバンドと称される場合がある。 The electronic device 100 is detachable from the user's body. For example, the electronic device 100 can be worn on the user's arm to acquire the user's biological information (or vital information). The biological information includes, for example, information such as heart rate, respiratory rate, blood pressure, and body temperature. In addition, for example, the electronic device 100 may acquire information such as the position of the user and the moving speed. The electronic device 100 may be referred to as a vital sensing band, for example.
　図１から図３に示すように、電子機器１００は、バイタルセンシングユニット（以下、「センシングユニット」と称する場合がある。）１００－Ａとバンドアタッチメント（以下、「バンド」と称する場合がある。）１００－Ｂを備える。 As shown in FIGS. 1 to 3, the electronic device 100 may be referred to as a vital sensing unit (hereinafter also referred to as “sensing unit”) 100-A and a band attachment (hereinafter referred to as “band”). ) 100-B.
　センシングユニット１００－Ａには、内部に様々なセンサを備えている。種々のセンサにより、生体情報などを取得することが可能となる。図３に示す例では、温度センサ１１０が備えられている例を示している。図３に示すように、温度センサ１１０は、センシングユニット１００－Ａの利用者の体と接触する面（以下、「裏面」と称する場合がある。）側に備えられている。 The sensing unit 100-A has various sensors inside. Biological information and the like can be acquired by various sensors. In the example illustrated in FIG. 3, an example in which the temperature sensor 110 is provided is illustrated. As shown in FIG. 3, the temperature sensor 110 is provided on the surface (hereinafter, also referred to as “back surface”) of the sensing unit 100-A that contacts the user's body.
　また、図１から図２などに示すように、バンド１００－Ｂは、突起１００－Ｂ１と複数の穴１００－Ｂ２を備える。利用者は、腕に電子機器１００を装着すると、突起１００－Ｂ１を所望の穴１００－Ｂ２に挿入することで、電子機器１００を腕に固定することが可能となる。 Further, as shown in FIGS. 1 to 2, etc., the band 100-B includes a protrusion 100-B1 and a plurality of holes 100-B2. When the user attaches the electronic device 100 to the arm, the user can fix the electronic device 100 to the arm by inserting the protrusion 100-B1 into the desired hole 100-B2.
　図４は、電子機器１００が腕に装着されたときの断面図を表している。温度センサ１１０は電子機器１００の裏面側に設けられることで、電子機器１００が腕と接触すると、利用者の体温を検出することが可能となる。温度センサ１１０は、センシングユニット１００－Ａの内部ではなく、利用者の腕と直接接触する位置に設けられてもよい。 FIG. 4 shows a cross-sectional view when the electronic device 100 is worn on the arm. The temperature sensor 110 is provided on the back side of the electronic device 100, so that when the electronic device 100 comes into contact with the arm, the body temperature of the user can be detected. The temperature sensor 110 may be provided not at the inside of the sensing unit 100-A but at a position in direct contact with the user's arm.
　なお、温度センサ１１０の位置は、電子機器１００の裏面側になくてもよい。例えば、熱伝導率が所定値以上の金属などで電子機器１００が作成されていたり、このような金属が裏面の一部にあって温度センサ１１０と接続されたりする場合、温度センサ１１０は、裏面と反対面の表面側に配置されてもよい。 Note that the position of the temperature sensor 110 may not be on the back side of the electronic device 100. For example, when the electronic device 100 is made of a metal having a thermal conductivity of a predetermined value or more, or when such a metal is part of the back surface and is connected to the temperature sensor 110, the temperature sensor 110 is It may be arranged on the surface side opposite to the surface.
　＜着脱前後の温度変化例＞
　図５（Ａ）から図５（Ｆ）は電子機器１００の腕への着脱前後における温度変化の例を表している。このうち、図５（Ａ）から図５（Ｃ）は、空気の温度をＴａ、腕の温度（又は腕の表面温度、或いは利用者の体温。以下、「腕の温度」と称する場合がある。）をＴｂとしたとき、Ｔａ＜Ｔｂの場合の温度変化の例を表している。また、図５（Ｄ）から図５（Ｆ）は、Ｔａ＞Ｔｂの場合の温度変化の例をそれぞれ表している。 <Temperature change example before and after removal>
5A to 5F illustrate examples of temperature changes before and after attachment / detachment of the electronic device 100 to / from the arm. 5A to 5C, the air temperature is Ta, the arm temperature (or the arm surface temperature, or the user's body temperature; hereinafter referred to as “arm temperature”). .) Represents a temperature change example when Ta <Tb. FIGS. 5D to 5F show examples of temperature changes when Ta> Tb.
　電子機器１００は、腕への着脱の際に、電子機器１００と腕２００、電子機器１００と空気との間の熱収支により、温度変化が発生する。その際に、熱力学第２法則によって、熱は低温から高温へと伝わる。 When the electronic device 100 is attached to or detached from the arm, a temperature change occurs due to the heat balance between the electronic device 100 and the arm 200 and between the electronic device 100 and the air. At that time, heat is transferred from a low temperature to a high temperature according to the second law of thermodynamics.
　Ｔａ＜Ｔｂの場合、電子機器１００は、装着前は空気の温度Ｔａとほぼ同じ温度となっているが、装着後は、腕２００からの熱が電子機器１００側へと伝わり、電子機器１００の温度はＴａからＴｂへ変化する（図５（Ａ）から図５（Ｂ））。その後、電子機器１００は、腕から外されると、熱が外部へと放熱されて、電子機器１００の温度はＴａに近づく（図５（Ｃ））。 In the case of Ta <Tb, the electronic device 100 is almost the same temperature as the air temperature Ta before mounting, but after mounting, heat from the arm 200 is transmitted to the electronic device 100 side, and the electronic device 100 The temperature changes from Ta to Tb (FIGS. 5A to 5B). After that, when the electronic device 100 is removed from the arm, heat is radiated to the outside, and the temperature of the electronic device 100 approaches Ta (FIG. 5C).
　また、Ｔａ＞Ｔｂの場合、電子機器１００は、装着後、熱が電子機器１００から腕２００へと伝わり、電子機器１００の温度はＴａからＴｂへ変化する（図５（Ｄ）から図５（Ｅ））。その後、電子機器１００は、空気からの熱を受けて、その温度がＴａに近づく（図５（Ｆ））。 In the case of Ta> Tb, after the electronic device 100 is mounted, heat is transferred from the electronic device 100 to the arm 200, and the temperature of the electronic device 100 changes from Ta to Tb (FIG. 5D to FIG. E)). After that, the electronic device 100 receives heat from the air, and the temperature approaches Ta (FIG. 5F).
　このように空気の温度Ｔａと腕の温度Ｔｂの温度差によって、電子機器１００の装着前後の温度が、低い温度から高い温度になったり、高い温度から低い温度になったりする。 Thus, depending on the temperature difference between the air temperature Ta and the arm temperature Tb, the temperature before and after the mounting of the electronic device 100 changes from a low temperature to a high temperature, or from a high temperature to a low temperature.
　以下において、温度センサ１１０における測定値（又は測定温度。以下、「測定値」と称する場合がある。）の実験結果について説明する。最初に、Ｔａ＜Ｔｂの場合（図５（Ａ）から図５（Ｃ））、次に、Ｔａ＞Ｔｂの場合（図５（Ｄ）から図５（Ｄ））の場合について説明し、最後に、いずれの場合でもあっても着脱判定可能なことについて説明する。 In the following, the experimental results of the measured value (or measured temperature, sometimes referred to as “measured value”) in the temperature sensor 110 will be described. First, the case of Ta <Tb (FIGS. 5A to 5C), and the case of Ta> Tb (FIGS. 5D to 5D) will be described. Next, the fact that the attachment / detachment determination is possible in any case will be described.
　＜Ｔａ＜Ｔｂの場合の実験結果＞
　図６は、装着前後における温度センサ１１０による測定値の変化の例を表すグラフである。図６において、縦軸は測定値Ｔ、横軸は時間ｔをそれぞれ表している。図６はＴａ＜Ｔｂの場合の例である。 <Experimental results for Ta <Tb>
FIG. 6 is a graph showing an example of changes in measured values by the temperature sensor 110 before and after mounting. In FIG. 6, the vertical axis represents the measured value T, and the horizontal axis represents time t. FIG. 6 shows an example in the case of Ta <Tb.
　図６に示すように、電子機器１００が腕に装着されると、温度センサ１１０の測定値Ｔは上昇し、その後、上昇率は緩やかになり、腕の温度Ｔｂに近づく。なお、電子機器１００が利用者の体に装着されている状態を「装着状態」と称する場合がある。 As shown in FIG. 6, when the electronic device 100 is worn on the arm, the measured value T of the temperature sensor 110 increases, and then the rate of increase becomes moderate and approaches the arm temperature Tb. Note that a state where the electronic device 100 is worn on the user's body may be referred to as a “wearing state”.
　その後、利用者が電子機器１００を腕から取り外すと、温度センサ１１０による測定値Ｔは下降し、その後、下降率は緩やかになり、空気の温度Ｔａに近づく。なお、電子機器１００が利用者の体から取り外された（又は脱着された）状態を「脱着状態」と称する場合がある。また、以下において、「取り外し」と「脱着」と同じ意味に用いる場合がある。 Thereafter, when the user removes the electronic device 100 from the arm, the measured value T measured by the temperature sensor 110 decreases, and then the rate of decrease decreases and approaches the air temperature Ta. Note that a state in which electronic device 100 is removed (or detached) from the user's body may be referred to as a “detached state”. In the following description, the terms “removal” and “removal” may be used interchangeably.
　利用者が電子機器１００の着脱を繰り返すと、このような測定値Ｔの変化の推移が繰り返される。なお、図６においては、「脱着状態」において、電子機器１００を横置きしたり、仰向けにしたり、うつ伏せにしたりして種々の態様で実験したものとなっている。「脱着状態」がどのような態様であっても、「装着状態」で測定値Ｔが上昇し、「脱着状態」で測定値Ｔが下降するパターンは同じであった。 When the user repeatedly attaches and detaches the electronic device 100, such a change in the measured value T is repeated. In FIG. 6, in the “detached state”, the electronic device 100 was placed horizontally, turned on its back, or laid face down, and various experiments were performed. The pattern in which the measured value T increases in the “wearing state” and the measured value T decreases in the “detached state” is the same regardless of the “detached state”.
　図７（Ａ）は、図６の測定値Ｔに対して、所定時間（又は単位時間）あたりの変化量を表すグラフである。図７（Ａ）において、縦軸は、測定値Ｔの所定時間Δｔあたりの変化量（ΔＴ／Δｔ）、横軸は時間ｔをそれぞれ表している。 FIG. 7A is a graph showing the amount of change per predetermined time (or unit time) with respect to the measured value T in FIG. In FIG. 7A, the vertical axis represents the amount of change (ΔT / Δt) of the measured value T per predetermined time Δt, and the horizontal axis represents time t.
　図７（Ａ）に示すように、電子機器１００が腕に装着されると、測定値Ｔの変化量（ΔＴ／Δｔ）は正方向へ急激に変化する。これは電子機器１００が腕に装着された瞬間の測定値Ｔの変化量は、他の場合よりも非常に大きいことを表している。その後、変化量（ΔＴ／Δｔ）はほぼ一定で推移する。これは「装着状態」において測定値Ｔが腕の温度Ｔｂ近傍で推移していることを表している。 As shown in FIG. 7A, when the electronic device 100 is worn on the arm, the change amount (ΔT / Δt) of the measured value T changes rapidly in the positive direction. This indicates that the amount of change in the measured value T at the moment when the electronic device 100 is worn on the arm is much larger than in other cases. Thereafter, the amount of change (ΔT / Δt) changes substantially constant. This indicates that the measured value T changes in the vicinity of the arm temperature Tb in the “wearing state”.
　一方、電子機器１００が腕から取り外された瞬間、負方向へ変化している。これは、電子機器１００が腕から取り外され、電子機器１００が腕よりも温度が低い空気に触れることで、測定値Ｔが低くなるためである。以降においても、同様の推移を繰り返しており、「装着状態」になった瞬間に変化量（ΔＴ／Δｔ）は正方向へ変化し、「脱着状態」になった瞬間に負方向へ変化している。 On the other hand, the moment the electronic device 100 is removed from the arm, the direction changes in the negative direction. This is because the measured value T is lowered when the electronic device 100 is detached from the arm and the electronic device 100 touches air having a temperature lower than that of the arm. After that, the same transition is repeated, and the amount of change (ΔT / Δt) changes in the positive direction at the moment when it becomes “wearing state”, and changes in the negative direction at the moment when it becomes “detached state”. Yes.
　以上のような実験結果に基づいて、Ｔａ＜Ｔｂの場合、例えば、測定値Ｔの所定時間Δｔあたりの変化量（ΔＴ／Δｔ）が＋Ａ（又は第１の閾値）以上のとき、電子機器１００は、電子機器１００が利用者の体に装着された、と判定することが可能である。また、Ｔａ＜Ｔｂの場合、例えば、測定値Ｔの所定時間Δｔあたりの変化量（ΔＴ／Δｔ）が－Ｂ（又は第２の閾値。｜Ａ｜＞｜Ｂ｜）未満のとき、電子機器１００は、電子機器１００が利用者の体から取り外された、と判定することが可能である。図７（Ｂ）はそのような判定条件の例を表にまとめたものである。 Based on the experimental results as described above, when Ta <Tb, for example, when the change amount (ΔT / Δt) of the measurement value T per predetermined time Δt is + A (or the first threshold value) or more, the electronic device 100 It can be determined that the electronic device 100 is attached to the user's body. In the case of Ta <Tb, for example, when the change amount (ΔT / Δt) of the measured value T per predetermined time Δt is less than −B (or the second threshold value | A |> | B |), the electronic device 100 can determine that the electronic device 100 has been removed from the user's body. FIG. 7B summarizes examples of such determination conditions in a table.
　＜Ｔａ＞Ｔｂの場合の実験結果＞
　図８は、装着前後における温度センサ１１０による測定値の変化の例を表すグラフである。図８において、縦軸は測定値Ｔ、横軸は時間ｔをそれぞれ表している。図８は、Ｔａ＞Ｔｂとなっている以外は、図６の場合と同一の条件で測定されたものである。 <Experimental results for Ta>Tb>
FIG. 8 is a graph showing an example of changes in measured values by the temperature sensor 110 before and after mounting. In FIG. 8, the vertical axis represents the measured value T, and the horizontal axis represents time t. FIG. 8 is measured under the same conditions as in FIG. 6 except that Ta> Tb.
　図８に示すように、電子機器１００が腕に装着されると、測定値Ｔは下降して、その後、下降率は緩やかになり、腕の温度Ｔｂに近づく。一方、電子機器１００が腕から取り外されると、測定値Ｔは上昇し、その後、上昇率は緩やかになり、空気の温度Ｔａに近づく。利用者が電子機器１００の着脱を繰り返すと、このような測定値Ｔの変化の推移が繰り返される。 As shown in FIG. 8, when the electronic device 100 is worn on the arm, the measured value T decreases, and then the rate of decrease becomes gentle and approaches the arm temperature Tb. On the other hand, when the electronic device 100 is removed from the arm, the measured value T increases, and then the rate of increase becomes moderate and approaches the air temperature Ta. When the user repeatedly attaches and detaches the electronic device 100, such a change in the measured value T is repeated.
　図９（Ａ）は、図８に示す測定値Ｔに対して、所定時間Δｔあたりの変化量（ΔＴ／Δｔ）を表すグラフである。 FIG. 9A is a graph showing the amount of change (ΔT / Δt) per predetermined time Δt with respect to the measured value T shown in FIG.
　図９（Ａ）に示すグラフは、図７（Ａ）とは逆の変化となっている。すなわち、電子機器１００が腕に装着された瞬間、測定値Ｔの変化量（ΔＴ／Δｔ）は負方向へ急激に変化し、その後、変化量（ΔＴ／Δｔ）はほぼ一定で推移する。一方、電子機器１００が腕から取り外された瞬間、測定値Ｔの変化量（ΔＴ／Δｔ）は正方向へ変化し、その後、ほぼ一定で推移する。 The graph shown in FIG. 9 (A) is opposite to that in FIG. 7 (A). That is, at the moment when the electronic device 100 is worn on the arm, the change amount (ΔT / Δt) of the measurement value T changes rapidly in the negative direction, and thereafter, the change amount (ΔT / Δt) changes substantially constant. On the other hand, at the moment when the electronic device 100 is removed from the arm, the change amount (ΔT / Δt) of the measurement value T changes in the positive direction, and thereafter changes substantially constant.
　以上の実験結果に基づいて、Ｔａ＞Ｔｂの場合、例えば、測定値Ｔの所定時間Δｔあたりの測定値の変化量（ΔＴ／Δｔ）が－Ａ（又は第３の閾値）未満のとき、電子機器１００は、電子機器１００が利用者の体に装着された、と判定することが可能である。また、Ｔａ＞Ｔｂの場合、例えば、測定値Ｔの所定時間Δｔあたりの変化量（ΔＴ／Δｔ）が＋Ｂ（又は第４の閾値）以上のとき、電子機器１００は、電子機器１００が利用者の体から取り外された、と判定することが可能である。図９（Ｂ）はそのような判定条件の例を表にまとめたものである。 Based on the above experimental results, when Ta> Tb, for example, when the amount of change (ΔT / Δt) of the measured value T per predetermined time Δt is less than −A (or the third threshold), The device 100 can determine that the electronic device 100 is attached to the user's body. In the case of Ta> Tb, for example, when the amount of change (ΔT / Δt) of the measured value T per predetermined time Δt is + B (or the fourth threshold) or more, the electronic device 100 is the user. It can be determined that it has been removed from the body. FIG. 9B summarizes examples of such determination conditions in a table.
　＜Ｔａ＜Ｔｂの場合も、Ｔａ＞Ｔｂの場合も着脱判定可能なことについて＞
　次に、Ｔａ＜Ｔｂの場合でも、Ｔａ＞Ｔｂの場合でも、電子機器１００において着脱判定が可能であることについて述べる。 <Attachment / detachment determination is possible in both cases of Ta <Tb and Ta>Tb>
Next, it will be described that the attachment / detachment determination is possible in the electronic device 100 regardless of whether Ta <Tb or Ta> Tb.
　図１０（Ａ）は、Ｔａ＜Ｔｂの場合の測定値Ｔの変化量（ΔＴ／Δｔ）のグラフ（例えば図７（Ａ）を一部拡大したグラフを表している。 FIG. 10 (A) shows a graph (for example, FIG. 7 (A) partially enlarged) of the change amount (ΔT / Δt) of the measured value T when Ta <Tb.
　本第１の実施の形態では、測定値Ｔの所定時間Δｔあたりの変化量（ΔＴ／Δｔ）の絶対値｜ΔＴ／Δｔ｜に着目する。上述したように、Ｔａ＞Ｔｂの場合、電子機器１００が装着された瞬間に変化量（ΔＴ／Δｔ）が正方向へ大きく変化する。一方、電子機器１００が取り外された瞬間に変化量（ΔＴ／Δｔ）が負方向へ大きく変化する。そして、その絶対値を比較すると、図１０（Ａ）に示すように、装着された瞬間の変化量の絶対値（例えば｜ΔＴ１／Δｔ１｜）は、取り外された瞬間の変化量の絶対値（例えば｜ΔＴ２／Δｔ２｜）よりも、大きくなっている。 In the first embodiment, attention is focused on the absolute value | ΔT / Δt | of the amount of change (ΔT / Δt) per predetermined time Δt of the measured value T. As described above, when Ta> Tb, the change amount (ΔT / Δt) greatly changes in the positive direction at the moment when the electronic device 100 is mounted. On the other hand, the amount of change (ΔT / Δt) greatly changes in the negative direction at the moment when the electronic device 100 is removed. When the absolute values are compared, as shown in FIG. 10A, the absolute value of the change amount at the moment of attachment (for example, | ΔT1 / Δt1 |) is the absolute value of the change amount at the moment of removal (for example, | ΔT1 / Δt1 |). For example, it is larger than | ΔT2 / Δt2 |).
　Ｔａ＜Ｔｂの場合も同様であり、例えば図９（Ａ）から明らかなように、変化量の絶対値｜ΔＴ／Δｔ｜を比較すると、装着された瞬間の変化量の絶対値（例えば｜ΔＴ３／Δｔ３｜）は、取り外された瞬間の変化量の絶対値（例えば｜ΔＴ４／Δｔ４｜）よりも大きい。 The same applies to the case of Ta <Tb. For example, as is clear from FIG. 9A, when the absolute value | ΔT / Δt | of the amount of change is compared, the absolute value of the amount of change at the moment of mounting (for example, | ΔT3 / Δt3 |) is larger than the absolute value (for example, | ΔT4 / Δt4 |) of the amount of change at the moment of removal.
　以上から、Ｔａ＜Ｔｂの場合でも、Ｔａ＞Ｔｂの場合でも、電子機器１００は、測定値Ｔの変化量の絶対値｜ΔＴ／Δｔ｜に基づいて、着脱判定を行うことが可能である。すなわち、例えば、電子機器１００は、その絶対値が＋Ａ（又は第１の閾値）以上のときは、電子機器１００が利用者の体に装着された、と判定することが可能である。また、例えば、電子機器１００は、その絶対値が＋Ｂ（又は第４の閾値）以上、かつ、＋Ａ未満のとき、電子機器１００が利用者の体から取り外された、と判定することが可能である。 From the above, whether Ta <Tb or Ta> Tb, the electronic device 100 can make the attachment / detachment determination based on the absolute value | ΔT / Δt | of the change amount of the measured value T. That is, for example, when the absolute value of the electronic device 100 is + A (or the first threshold value) or more, it can be determined that the electronic device 100 is attached to the user's body. For example, when the absolute value of the electronic device 100 is + B (or the fourth threshold) or more and less than + A, it can be determined that the electronic device 100 has been removed from the user's body. is there.
　このように、本第１の実施の形態における電子機器１００は測定値Ｔの変化量に基づいて着脱判定を行うことが可能である。以降では、電子機器１００の構成例と動作例について説明する。 As described above, the electronic device 100 according to the first embodiment can perform the attachment / detachment determination based on the change amount of the measurement value T. Hereinafter, a configuration example and an operation example of the electronic device 100 will be described.
　＜電子機器の構成例＞
　図１１は電子機器１００の構成例を表している。図１１は、例えば、センシングユニット１００－Ａ内の構成例を表している。 <Configuration example of electronic equipment>
FIG. 11 illustrates a configuration example of the electronic device 100. FIG. 11 illustrates a configuration example in the sensing unit 100-A, for example.
　電子機器１００は、温度センサ１１０、温度センサ制御部１１１、着脱判定処理部１２０、脈拍センサ１３０、及び無線処理部１４０を備える。 The electronic device 100 includes a temperature sensor 110, a temperature sensor control unit 111, an attachment / detachment determination processing unit 120, a pulse sensor 130, and a wireless processing unit 140.
　温度センサ１１０は、例えば、温度センサ制御部１１１からの指示に従って、電子機器１００の外部の温度を測定する。温度センサ１１０は、測定した測定値Ｔを温度センサ制御部１１１へ出力する。 The temperature sensor 110 measures the temperature outside the electronic device 100 according to an instruction from the temperature sensor control unit 111, for example. The temperature sensor 110 outputs the measured value T measured to the temperature sensor control unit 111.
　温度センサ制御部１１１は、温度センサ１１０に対する制御を行う。温度センサ制御部１１１は、例えば、温度センサ１１０に対して温度の測定を指示し、温度センサ１１０から測定値Ｔを受け取り、受け取った測定値を着脱判定処理部１２０へ出力する。 The temperature sensor control unit 111 controls the temperature sensor 110. For example, the temperature sensor control unit 111 instructs the temperature sensor 110 to measure temperature, receives the measurement value T from the temperature sensor 110, and outputs the received measurement value to the attachment / detachment determination processing unit 120.
　着脱判定処理部１２０は、温度センサ制御部１１１から測定値Ｔを受け取り、受け取った測定値Ｔから所定時間Δｔあたりの変化量（ΔＴ／Δｔ）を算出する。そして、着脱判定処理部１２０は、算出した変化量（ΔＴ／Δｔ）に基づいて、電子機器１００が利用者の体に装着されたか、又は、電子機器１００が利用者からの体から取り外されたかを判定する。詳細については動作例で説明する。 The attachment / detachment determination processing unit 120 receives the measurement value T from the temperature sensor control unit 111, and calculates a change amount (ΔT / Δt) per predetermined time Δt from the received measurement value T. The attachment / detachment determination processing unit 120 determines whether the electronic device 100 is attached to the user's body or whether the electronic device 100 is removed from the user's body based on the calculated change amount (ΔT / Δt). Determine. Details will be described in an operation example.
　脈拍センサ１３０は、例えば、発光素子と受光素子を備える。例えば、発光素子から発光された光が腕に照射され、反射光の光量などを受光素子で測定することで、脈拍の測定が可能である。上述したように、受光素子は、光を吸収するという血液中のモグロビンの特性に基づいて反射光を検出する。また、脈拍センサ１３０は、例えば、着脱判定処理部１２０からの発光素子の発光電流値を受け取り、その発光電流値に基づいて発光素子を発光させる。脈拍センサ１３０は、例えば、測定した脈拍値を着脱判定処理部１２０へ出力する。なお、発光素子はＬＥＤ、受光素子はＰＤ（Photodiode）でもよい。 The pulse sensor 130 includes, for example, a light emitting element and a light receiving element. For example, the pulse can be measured by irradiating the arm with light emitted from the light emitting element and measuring the amount of reflected light with the light receiving element. As described above, the light receiving element detects reflected light based on the characteristic of moglobin in blood that absorbs light. For example, the pulse sensor 130 receives the light emission current value of the light emitting element from the attachment / detachment determination processing unit 120 and causes the light emitting element to emit light based on the light emission current value. For example, the pulse sensor 130 outputs the measured pulse value to the attachment / detachment determination processing unit 120. The light emitting element may be an LED, and the light receiving element may be a PD (Photodiode).
　無線処理部１４０は、例えば、着脱の判定結果、温度センサ１１０の測定値Ｔ、及び脈拍センサ１３０の測定値の全部又は一部を、無線信号へ変換し、変換した無線信号を送信する。送信先としては、例えば、利用者が所有するスマートフォンや、バイタル情報などを集計して種々のサービスを提供するパーソナルコンピュータなどがある。 The wireless processing unit 140 converts, for example, all or part of the attachment / detachment determination result, the measured value T of the temperature sensor 110, and the measured value of the pulse sensor 130 into a wireless signal, and transmits the converted wireless signal. As a transmission destination, for example, there are a smartphone owned by a user, a personal computer that aggregates vital information and the like and provides various services.
　＜電子機器の動作例＞
　図１２は電子機器１００の着脱判定処理の動作例を表すフローチャートである。図１２の例は、Ｔａ＜Ｔｂの場合の着脱判定処理の例を表している。主に、着脱判定処理部１２０において実行される。 <Operation example of electronic equipment>
FIG. 12 is a flowchart illustrating an operation example of attachment / detachment determination processing of the electronic device 100. The example of FIG. 12 represents an example of attachment / detachment determination processing when Ta <Tb. It is mainly executed in the attachment / detachment determination processing unit 120.
　電子機器１００は、処理を開始すると（Ｓ１０）、停止要求の有無を判定する（Ｓ１１）。例えば、電子機器１００には着脱判定処理の実行を停止する停止ボタンなどがあり、着脱判定処理部１２０は、停止ボタンから出力された操作の有無を示す信号に基づいて、停止要求の有無を判定してもよい。 When the electronic device 100 starts processing (S10), it determines whether or not there is a stop request (S11). For example, the electronic device 100 includes a stop button that stops execution of the attachment / detachment determination process, and the attachment / detachment determination processing unit 120 determines the presence / absence of a stop request based on a signal indicating the presence / absence of an operation output from the stop button. May be.
　電子機器１００は、停止要求があるとき（Ｓ１１でＹｅｓ）、着脱判定処理を終了する（Ｓ１２）。 When there is a stop request (Yes in S11), the electronic device 100 ends the attachment / detachment determination process (S12).
　一方、電子機器１００は、停止要求がないとき（Ｓ１１でＮｏ）、温度センサ１１０の測定値の変化量（図１２では「微分値」）（ΔＴ／Δｔ）を算出する（Ｓ１３）。例えば、着脱判定処理部１２０は、温度センサ１１０で測定されたある期間における測定値を、温度センサ制御部１１１を介して温度センサ１１０から取得し、取得した測定値からその変化量（ΔＴ／Δｔ）を算出する。 On the other hand, when there is no stop request (No in S11), the electronic device 100 calculates the amount of change in the measured value of the temperature sensor 110 (“differential value” in FIG. 12) (ΔT / Δt) (S13). For example, the attachment / detachment determination processing unit 120 acquires a measurement value in a certain period measured by the temperature sensor 110 from the temperature sensor 110 via the temperature sensor control unit 111, and the change amount (ΔT / Δt from the acquired measurement value. ) Is calculated.
　次に、電子機器１００は、変化量（ΔＴ／Δｔ）が＋Ａ以上か否かを判定する（Ｓ１４）。 Next, the electronic device 100 determines whether or not the amount of change (ΔT / Δt) is greater than or equal to + A (S14).
　電子機器１００は、変化量（ΔＴ／Δｔ）が＋Ａ以上のとき（Ｓ１４でＹｅｓ）、電子機器１００が利用者の体に装着された（以下では、装着された（又は装着が発生した）ことを「着」と称する場合がある。）、と判定する（Ｓ１５）。そして、電子機器１００は、脈拍検知用のＬＥＤに対する発光電流を２２ｍＡに設定する（Ｓ１６）。 When the amount of change (ΔT / Δt) is greater than or equal to + A (Yes in S14), the electronic device 100 is worn on the user's body (hereinafter, worn (or worn)) (S15). And the electronic device 100 sets the light emission current with respect to LED for pulse detection to 22 mA (S16).
　例えば、以下の処理が行われる。すなわち、着脱判定処理部１２０は、算出した変化量（ΔＴ／Δｔ）と、内部メモリから読み出した閾値＋Ａとを比較して、変化量（ΔＴ／Δｔ）が＋Ａ以上のとき、「着」と判定する。そして、着脱判定処理部１２０は、脈拍センサ１３０におけるＬＥＤの発光電流を２２ｍＡに設定する。この場合、着脱判定処理部１２０は設定した発光電流値を脈拍センサ１３０へ出力し、当該電流値によりＬＥＤから光を照射する。すなわち、着脱判定処理部１２０は、「着」と判定したときは、脈拍センサ１３０を動作させるようにしている。 For example, the following processing is performed. That is, the attachment / detachment determination processing unit 120 compares the calculated change amount (ΔT / Δt) with the threshold value + A read from the internal memory, and when the change amount (ΔT / Δt) is greater than or equal to + A, judge. And the attachment / detachment determination processing unit 120 sets the light emission current of the LED in the pulse sensor 130 to 22 mA. In this case, the attachment / detachment determination processing unit 120 outputs the set light emission current value to the pulse sensor 130 and irradiates light from the LED with the current value. That is, the attachment / detachment determination processing unit 120 operates the pulse sensor 130 when it determines that it is “wearing”.
　なお、発光電流値の数値である２２ｍＡは一例であって、ＬＥＤから光が照射可能で、ＰＤにより検出可能であれば、どのような数値であってもよい。 The numerical value of the light emission current value of 22 mA is an example, and any numerical value may be used as long as light can be emitted from the LED and can be detected by the PD.
　一方、電子機器１００は、変化量（ΔＴ／Δｔ）が＋Ａ以上でないとき（Ｓ１４でＮｏ）、又は、Ｓ１６の処理終了後、変化量（ΔＴ／Δｔ）が－Ｂ未満か否かを判定する（Ｓ１７）。 On the other hand, electronic device 100 determines whether or not the amount of change (ΔT / Δt) is less than −B when the amount of change (ΔT / Δt) is not greater than + A (No in S14) or after the processing of S16 is completed. (S17).
　電子機器１００は、変化量（ΔＴ／Δｔ）が－Ｂ未満のとき（Ｓ１７でＹｅｓ）、電子機器１００が利用者の体から取り外された（以下では、取り外された（又は取り外しが発生した）ことを「脱」と称する場合がある。）、と判定する（Ｓ１８）。そして、電子機器１００は、脈拍検知用のＬＥＤに対する発光電流を０ｍＡに設定する。すなわち、着脱判定処理部１２０は、「脱」と判定したときは、脈拍センサ１３０の動作を停止させるようにしている。 When the amount of change (ΔT / Δt) is less than −B (Yes in S17), electronic device 100 is removed from the user's body (hereinafter, removed (or has been removed). This may be referred to as “deletion”) (S18). Then, the electronic device 100 sets the light emission current for the pulse detection LED to 0 mA. That is, the attachment / detachment determination processing unit 120 is configured to stop the operation of the pulse sensor 130 when determining “detachment”.
　例えば、以下の処理が行われる。すなわち、着脱判定処理部１２０は、算出した変化量（ΔＴ／Δｔ）と、内部メモリから読み出した閾値－Ｂとを比較して、変化量（ΔＴ／Δｔ）が－Ｂ未満のとき、「脱」と判定する。そして、着脱判定処理部１２０は、脈拍センサ１３０におけるＬＥＤに対する発光電流を０ｍＡに設定する。着脱判定処理部１２０は、０ｍＡを示す発光電流値を脈拍センサ１３０へ出力し、脈拍センサ１３０ではＬＥＤから光を照射しないようにする。これにより、例えば、電子機器１００では消費電力の削減を図ることが可能となる。 For example, the following processing is performed. That is, the attachment / detachment determination processing unit 120 compares the calculated change amount (ΔT / Δt) with the threshold value −B read from the internal memory, and when the change amount (ΔT / Δt) is less than −B, Is determined. Then, the attachment / detachment determination processing unit 120 sets the light emission current for the LED in the pulse sensor 130 to 0 mA. The attachment / detachment determination processing unit 120 outputs a light emission current value indicating 0 mA to the pulse sensor 130 so that the pulse sensor 130 does not emit light from the LED. As a result, for example, the electronic device 100 can reduce power consumption.
　一方、電子機器１００は、変化量（ΔＴ／Δｔ）が－Ｂ未満ではないとき（Ｓ１７でＮｏ）、又は、Ｓ１９の処理終了後、Ｓ１１へ処理を移行させて、上述した処理を繰り返す。 On the other hand, when the amount of change (ΔT / Δt) is not less than −B (No in S17) or after the process of S19 ends, the electronic device 100 shifts the process to S11 and repeats the above-described process.
　図１３は、Ｔａ＞Ｔｂの場合の着脱判定処理の動作例を表す。この場合、Ｔａ＜Ｔｂの場合（例えば図１２）と比較して、判定処理（Ｓ１４，Ｓ１７）が異なる以外は共通である。 FIG. 13 shows an operation example of the attachment / detachment determination process when Ta> Tb. In this case, the determination process (S14, S17) is common except for Ta <Tb (for example, FIG. 12).
　すなわち、電子機器１００は、算出した変化量（ΔＴ／Δｔ）が－Ａ未満のとき（Ｓ２１でＹｅｓ）、「着」と判定する（Ｓ１５）。 That is, when the calculated change amount (ΔT / Δt) is less than −A (Yes in S21), the electronic device 100 determines “arrived” (S15).
　一方、電子機器１００は、算出した変化量（ΔＴ／Δｔ）が－Ａ未満ではないとき（Ｓ２１でＮｏ）、Ｓ２２の処理を行う。Ｓ２２において、電子機器１００は、算出した変化量（ΔＴ／Δｔ）が＋Ｂ以上か否かを判定する。そして、電子機器１００は、算出した変化量（ΔＴ／Δｔ）が＋Ｂ以上のとき（Ｓ２２でＹｅｓ）、「脱」と判定する（Ｓ１８）。 On the other hand, when the calculated change amount (ΔT / Δt) is not less than −A (No in S21), the electronic device 100 performs the process of S22. In S22, electronic device 100 determines whether or not the calculated change amount (ΔT / Δt) is greater than or equal to + B. When the calculated change amount (ΔT / Δt) is equal to or greater than + B (Yes in S22), the electronic device 100 determines “depart” (S18).
　一方、電子機器１００は、算出した変化量（ΔＴ／Δｔ）が＋Ｂ以上でないとき（Ｓ２２でＮｏ）、Ｓ１１へ移行して上述した処理を繰り返す。このような判定は、例えば、着脱判定処理部１２０で行われる。 On the other hand, when the calculated change amount (ΔT / Δt) is not greater than + B (No in S22), the electronic device 100 proceeds to S11 and repeats the above-described processing. Such a determination is performed by, for example, the attachment / detachment determination processing unit 120.
　図１４は、Ｔａ＞Ｔｂの場合でもＴａ＜Ｔｂの場合でもいずれの場合でも検出可能な着脱判定処理の動作例を示すフローチャートである。 FIG. 14 is a flowchart showing an operation example of the attachment / detachment determination process that can be detected in both cases of Ta> Tb and Ta <Tb.
　この場合も、Ｔａ＞Ｔｂの場合の処理（例えば図１２）と比較して、判定処理が異なる以外は共通である。 This case is also common except that the determination process is different from the process in the case of Ta> Tb (for example, FIG. 12).
　すなわち、電子機器１００は、算出した変化量（ΔＴ／Δｔ）の絶対値｜ΔＴ／Δｔ｜がＡ以上のとき（Ｓ２３でＹｅｓ）、「着」と判定する（Ｓ１５）。 That is, when the absolute value | ΔT / Δt | of the calculated change amount (ΔT / Δt) is equal to or greater than A (Yes in S23), the electronic device 100 determines “arrived” (S15).
　一方、電子機器１００は、算出した変化量（ΔＴ／Δｔ）の絶対値｜ΔＴ／Δｔ｜がＡ以上ではないとき（Ｓ２３でＮｏ）、Ｓ２４の処理を行う。Ｓ２４において、電子機器１００は、算出した変化量（ΔＴ／Δｔ）の絶対値｜ΔＴ／Δｔ｜が＋Ｂ以上、かつ、＋Ａ未満か否かを判定する。そして、電子機器１００は、算出した変化量（ΔＴ／Δｔ）の絶対値｜ΔＴ／Δｔ｜がＢ以上、かつ、Ａ未満のとき（Ｓ２４でＹｅｓ）、「脱」と判定する。 On the other hand, when the absolute value | ΔT / Δt | of the calculated change amount (ΔT / Δt) is not equal to or greater than A (No in S23), the electronic device 100 performs the process of S24. In S24, the electronic device 100 determines whether or not the absolute value | ΔT / Δt | of the calculated change amount (ΔT / Δt) is greater than or equal to + B and less than + A. When the absolute value | ΔT / Δt | of the calculated change amount (ΔT / Δt) is equal to or greater than B and less than A (Yes in S24), electronic device 100 determines “departure”.
　一方、電子機器１００は、算出した変化量（ΔＴ／Δｔ）の絶対値｜ΔＴ／Δｔ｜がＢ以上、かつ、Ａ未満ではないとき（Ｓ２４でＮｏ）、Ｓ１１へ移行して上述した処理を繰り返す。 On the other hand, when the absolute value | ΔT / Δt | of the calculated change amount (ΔT / Δt) is not less than B and less than A (No in S24), the electronic device 100 proceeds to S11 and performs the above-described processing. repeat.
　この場合、利用者の体温と空気の温度についていずれか高い場合であっても、電子機器１００は着脱を判定することができる利点がある。 In this case, there is an advantage that the electronic device 100 can determine attachment / detachment even when the user's body temperature and air temperature are higher.
　図１５は、電子機器１００のハードウェア構成例を表している。電子機器１００は、温度センサ１１０、脈拍センサ１３０、ＲＯＭ（Read Only Memory）１５０、ＲＡＭ（Random Access Memory）１５１を備える。また、電子機器１００は、ＮＡＮＤ型フラッシュメモリ（以下、「ＮＡＮＤメモリ」と称する場合がある。）１５２、ＢＬＥ（Bluetooth Low Energy）１５３、及びプロセッサ１５５を備える。 FIG. 15 illustrates a hardware configuration example of the electronic device 100. The electronic device 100 includes a temperature sensor 110, a pulse sensor 130, a ROM (Read Only Memory) 150, and a RAM (Random Access Memory) 151. The electronic device 100 also includes a NAND flash memory (hereinafter also referred to as “NAND memory”) 152, a BLE (Bluetooth Low Energy) 153, and a processor 155.
　プロセッサ１５５は、例えば、ＲＯＭ１５０に記憶されたプログラムを読み出して、ＲＡＭ１５１にロードし、ロードしたプログラムを実行することで、温度センサ制御部１１１や、上述した着脱判定処理部１２０の処理や機能を実行する。このようなプログラムは、例えば、着脱検知プログラムであってもよい。プロセッサ１５５は、例えば、温度センサ制御部１１１と着脱判定処理部１２０に対応する。 For example, the processor 155 reads out a program stored in the ROM 150, loads it into the RAM 151, and executes the loaded program, thereby executing the processes and functions of the temperature sensor control unit 111 and the attachment / detachment determination processing unit 120 described above. To do. Such a program may be, for example, an attachment / detachment detection program. The processor 155 corresponds to, for example, the temperature sensor control unit 111 and the attachment / detachment determination processing unit 120.
　ＮＡＮＤメモリ１５２は、例えば、不揮発性のメモリであって、プロセッサ１５５などにおいて各種処理を実行する際に使用されパラメータを保持する。ＮＡＮＤメモリ１５２は、着脱判定処理で使用される閾値（＋Ａ，－Ｂ，－Ａ，＋Ｂなど）を保持してもよい。 The NAND memory 152 is, for example, a non-volatile memory, and stores parameters used when various processes are executed in the processor 155 or the like. The NAND memory 152 may hold threshold values (+ A, −B, −A, + B, etc.) used in the attachment / detachment determination process.
　ＢＬＥ１５３は、例えば、近距離無線通信方式の１つであって、Ｂｌｕｅｔｏｏｔｈ（登録商標）４．０などとして仕様化された方式を用いて無線通信を行う。ＢＬＥ１５３は、例えば、無線処理部１４０に対応する。 BLE153 is one of short-range wireless communication methods, for example, and performs wireless communication using a method specified as Bluetooth (registered trademark) 4.0 or the like. The BLE 153 corresponds to the wireless processing unit 140, for example.
　このように本第１の実施の形態においては、電子機器１００は、温度センサ１１０で測定された測定値Ｔの所定時間Δｔあたりの変化量（ΔＴ／Δｔ）に基づいて着脱の発生を検出している。従って、電子機器１００は、温度センサ１１０における単一の測定値で着脱の発生を検出する場合と比較して、その測定値に誤差が生じる場合であっても、他の測定値によって誤差を吸収することが可能となり、利用者の体に対する着脱を正確に判定することが可能となる。 As described above, in the first embodiment, electronic device 100 detects the occurrence of attachment / detachment based on the amount of change (ΔT / Δt) per predetermined time Δt of measurement value T measured by temperature sensor 110. ing. Therefore, the electronic device 100 absorbs the error by other measurement values even when an error occurs in the measurement value as compared with the case where the occurrence of attachment / detachment is detected by the single measurement value in the temperature sensor 110. This makes it possible to accurately determine whether the user is attached to or detached from the body.
　また、利用者が電子機器１００を腕から取り外して、電子機器１００の裏面側を太陽光にあてるようにしてひっくり返した場合であっても、例えば、図６に示す実験結果が示すように、そうでない場合と同様の温度変化が生じている。その測定値の変化量（ΔＴ／Δｔ）は、例えば、図７（Ａ）や図９（Ａ）に示すように、ひっくり返した場合でも、そうでない場合でも、大きく相違することはない。よって、電子機器１００は、その温度変化量（ΔＴ／Δｔ）を検出することで、利用者が電子機器１００を腕から取り外してひっくり返した場合でも、着脱を正確に検出することが可能となる。 Moreover, even when the user removes the electronic device 100 from the arm and turns the electronic device 100 so that the back side of the electronic device 100 is exposed to sunlight, for example, as shown in the experimental results shown in FIG. The temperature change similar to the case where it is not so has arisen. The amount of change (ΔT / Δt) in the measured value does not differ greatly whether it is turned over or not as shown in FIGS. 7A and 9A, for example. Therefore, the electronic device 100 detects the temperature change amount (ΔT / Δt), so that even when the user removes the electronic device 100 from the arm and turns it over, the attachment / detachment can be accurately detected. .
　［第２の実施の形態］
　次に、第２の実施の形態について説明する。第２の実施の形態においては、電子機器１００は、更に、利用者の歩数を検知し、歩数を検知すると着脱判定を行わないようにする例である。これは、例えば、利用者が歩いていたりする場合、電子機器１００を腕に装着したり、腕に装着した電子機器１００を取り外したりする動作が行われない可能性を考慮したものである。 [Second Embodiment]
Next, a second embodiment will be described. In the second embodiment, electronic device 100 is an example in which the number of steps of the user is further detected, and the attachment / detachment determination is not performed when the number of steps is detected. This is because, for example, when the user is walking, there is a possibility that the operation of attaching the electronic device 100 to the arm or removing the electronic device 100 attached to the arm is not performed.
　図１６は、第２の実施の形態における電子機器１００の構成例を表す図である。電子機器１００は、更に、加速度センサ１６０、加速度センサ制御部１６１、歩数計処理部１６２を備える。 FIG. 16 is a diagram illustrating a configuration example of the electronic device 100 according to the second embodiment. The electronic device 100 further includes an acceleration sensor 160, an acceleration sensor control unit 161, and a pedometer processing unit 162.
　加速度センサ１６０は、例えば、加速度センサ制御部１６１からの指示に従って加速度を検出する。加速度センサ１６０は、例えば、光学的方式や半導体方式などを利用して加速度を検出してもよい。加速度センサ１６０は、検出した測定値を加速度センサ制御部１６１へ出力する。 The acceleration sensor 160 detects acceleration according to an instruction from the acceleration sensor control unit 161, for example. The acceleration sensor 160 may detect acceleration using, for example, an optical method or a semiconductor method. The acceleration sensor 160 outputs the detected measurement value to the acceleration sensor control unit 161.
　加速度センサ制御部１６１は、例えば、加速度センサ１６０に対して検出を指示し、加速度センサ１６０から受け取った測定値を歩数計処理部１６２へ出力する。　 The acceleration sensor control unit 161, for example, instructs the acceleration sensor 160 to detect, and outputs the measurement value received from the acceleration sensor 160 to the pedometer processing unit 162. *
　歩数計処理部１６２は、加速度センサ制御部１６１から受け取った測定値に基づいて歩数をカウントする。例えば、歩数計処理部１６２は、測定値が閾値以上となる回数をカウントすることで、歩数をカウントしてもよい。歩数計処理部１６２は、カウントした歩数を着脱判定処理部１２０へ出力する。 The pedometer processing unit 162 counts the number of steps based on the measurement value received from the acceleration sensor control unit 161. For example, the pedometer processing unit 162 may count the number of steps by counting the number of times the measured value is equal to or greater than a threshold value. The pedometer processing unit 162 outputs the counted number of steps to the attachment / detachment determination processing unit 120.
　着脱判定処理部１２０では、歩数計処理部１６２から歩数のカウント値に基づいて、着脱判定を行わないようにする。その具体的な動作について以下説明する。 The attachment / detachment determination processing unit 120 does not perform attachment / detachment determination based on the count value of the number of steps from the pedometer processing unit 162. The specific operation will be described below.
　図１７は、本第２の実施の形態における着脱判定処理の動作例を表すフローチャートである。図１７は、Ｔａ＜Ｔｂの場合の動作例となっている。 FIG. 17 is a flowchart showing an operation example of the attachment / detachment determination processing in the second embodiment. FIG. 17 shows an operation example when Ta <Tb.
　電子機器１００は、測定値の変化量（ΔＴ／Δｔ）が閾値＋Ａ以上のとき（Ｓ１４でＹｅｓ）、歩数の有無を判定する（Ｓ３１）。例えば、着脱判定処理部１２０は、変化量（ΔＴ／Δｔ）が＋Ａ以上のとき、歩数計処理部１６２から「１」以上の歩数を受け取ったか否かを判定する。 The electronic device 100 determines whether or not there is a step count when the change amount (ΔT / Δt) of the measured value is equal to or greater than the threshold value + A (Yes in S14) (S31). For example, when the amount of change (ΔT / Δt) is greater than or equal to + A, the attachment / detachment determination processing unit 120 determines whether or not a step count of “1” or more has been received from the pedometer processing unit 162.
　電子機器１００は、歩数があるとき（Ｓ３１でＹｅｓ）、着脱判定を行わないようにする（Ｓ３２）。例えば、着脱判定処理部１２０は、歩数計処理部１６２から「１」以上の歩数を受け取ると、着脱判定を行わないようにする。 The electronic device 100 does not perform the attachment / detachment determination when there is a step count (Yes in S31) (S32). For example, the attachment / detachment determination processing unit 120 does not perform attachment / detachment determination when receiving a step count of “1” or more from the pedometer processing unit 162.
　一方、電子機器１００は、歩数がないとき（Ｓ３１でＮｏ）、「着」と判定する（Ｓ１５）。例えば、着脱判定処理部１２０は、歩数計処理部１６２から歩数を受け取らない、或いは、「０」の歩数を受け取ると、着脱判定を行って、「着」と判定する。 On the other hand, when there is no number of steps (No in S31), the electronic device 100 determines “arrived” (S15). For example, if the attachment / detachment determination processing unit 120 does not receive the number of steps from the pedometer processing unit 162 or receives the number of steps of “0”, the attachment / detachment determination is performed to determine “arrived”.
　また、電子機器１００は、測定値の変化量（ΔＴ／Δｔ）が－Ｂ未満のとき（Ｓ１７でＹｅｓ）、歩数の有無を判定する（Ｓ３３）。電子機器１００は、歩数が有れば（Ｓ３３でＹｅｓ）、着脱判定を行わず（Ｓ３４）、歩数がないとき（Ｓ３３でＮｏ）、「着」と判定する。例えば、着脱判定処理部１２０は、Ｓ３１と同様に、歩数計処理部１６２から「１」以上の歩数を受け取ると、着脱判定を行わないようにし、歩数を受け取らない、或いは、「０」の歩数を受け取ると、着脱判定を行って、「脱」と判定する。 In addition, when the change amount (ΔT / Δt) of the measured value is less than −B (Yes in S17), the electronic device 100 determines whether or not there is a step count (S33). If there is a step count (Yes in S33), the electronic device 100 does not perform attachment / detachment determination (S34), and if there is no step count (No in S33), the electronic device 100 determines “arrived”. For example, in the same manner as in S31, when the attachment / detachment determination processing unit 120 receives a step count of “1” or more from the pedometer processing unit 162, the attachment / detachment determination unit 120 does not perform the attachment / detachment determination and does not receive the step count, or “0” Is received, the attachment / detachment determination is performed and it is determined as “detachment”.
　なお、Ｔａ＞Ｔｂの場合の着脱判定処理（例えば図１３）においても、電子機器１００は、歩数が有れば（図１７のＳ３１でＹｅｓ，Ｓ３３でＹｅｓ）、着脱判定を行わないようにする（Ｓ３２，Ｓ３４）。また、電子機器１００は、歩数がないとき（Ｓ３１でＮｏ，Ｓ３３でＮｏ）、着脱判定を行う（図１３のＳ１５，Ｓ１８）。このような判定処理は図１７の場合と同一である。 Even in the attachment / detachment determination process in the case of Ta> Tb (for example, FIG. 13), the electronic device 100 does not perform the attachment / detachment determination if there is a step count (Yes in S31 of FIG. 17, Yes in S33). (S32, S34). In addition, when there is no number of steps (No in S31, No in S33), the electronic device 100 performs attachment / detachment determination (S15 and S18 in FIG. 13). Such a determination process is the same as in FIG.
　また、Ｔａ＞ＴｂでもＴａ＜Ｔｂでも検出可能な着脱判定処理（例えば図１４）においても、歩数があるとき（図１７のＳ３１でＹｅｓ，Ｓ３３でＹｅｓ）、着脱判定を行わないようにする（Ｓ３２，Ｓ３４）。また、電子機器１００は、歩数がないとき（Ｓ３１でＮｏ，Ｓ３３でＮｏ）、着脱判定を行う（図１４のＳ１５，Ｓ１８）。このような判定処理は図１７の場合と同一である。 Also, in the attachment / detachment determination process (for example, FIG. 14) that can be detected even when Ta> Tb or Ta <Tb, when there is a step count (Yes in S31 of FIG. 17, Yes in S33), the attachment / detachment determination is not performed ( S32, S34). In addition, when there is no number of steps (No in S31, No in S33), the electronic device 100 performs attachment / detachment determination (S15 and S18 in FIG. 14). Such a determination process is the same as in FIG.
　図１８は第２の実施の形態における電子機器１００のハードウェア構成例を表している。電子機器１００は、更に、加速度センサ１６０を備える。 FIG. 18 illustrates a hardware configuration example of the electronic device 100 according to the second embodiment. The electronic device 100 further includes an acceleration sensor 160.
　プロセッサ１５５は、例えば、ＲＯＭ１５０に記憶されたプログラムを読み出して、ＲＡＭ１５１にロードし、ロードしたプログラムを実行することで、上述した着脱判定処理などを実行することが可能である。プロセッサ１５５は、例えば、温度センサ制御部１１１、着脱判定処理部１２０、加速度センサ制御部１６１、歩数計処理部１６２に対応する。 For example, the processor 155 can read out a program stored in the ROM 150, load the program into the RAM 151, and execute the loaded program, thereby executing the above-described attachment / detachment determination process or the like. The processor 155 corresponds to, for example, the temperature sensor control unit 111, the attachment / detachment determination processing unit 120, the acceleration sensor control unit 161, and the pedometer processing unit 162.
　本第２の実施の形態では、電子機器１００は、更に、加速度センサ１６０により電子機器１００を利用する利用者の歩数が検出されたとき、着脱の発生を検出しないようにしている。そのため、温度センサ１１０や温度センサ制御部１１１の動作が停止され、着脱判定処理部１２０における着脱判定（例えば図１７のＳ１５，Ｓ１８）を行わない場合がある。よって、本第２の実施の形態においては、歩数の有無にかかわらず着脱判定を行う場合と比較して、電子機器１００の消費電力の削減を図ることが可能となる。 In the second embodiment, when the number of steps of the user who uses the electronic device 100 is detected by the acceleration sensor 160, the electronic device 100 does not detect the occurrence of attachment / detachment. Therefore, the operations of the temperature sensor 110 and the temperature sensor control unit 111 are stopped, and the attachment / detachment determination (for example, S15 and S18 in FIG. 17) in the attachment / detachment determination processing unit 120 may not be performed. Therefore, in the second embodiment, the power consumption of the electronic device 100 can be reduced as compared with the case where the attachment / detachment determination is performed regardless of the number of steps.
　［第３の実施の形態］
　次に、第３の実施の形態について説明する。図１９は、第３の実施の形態における電子機器１００の構成例を表す図である。電子機器１００は利用者の体に着脱可能となっている。電子機器１００は、温度センサ１１０と着脱判定処理部１２０を備える。 [Third Embodiment]
Next, a third embodiment will be described. FIG. 19 is a diagram illustrating a configuration example of the electronic device 100 according to the third embodiment. The electronic device 100 is detachable from the user's body. The electronic device 100 includes a temperature sensor 110 and an attachment / detachment determination processing unit 120.
　温度センサ１１０は、外部の温度を測定する。着脱判定処理部１２０は、温度センサ１１０で測定された測定値の所定時間あたりの変化量に基づいて、着脱の発生を検出する。 The temperature sensor 110 measures an external temperature. The attachment / detachment determination processing unit 120 detects the occurrence of attachment / detachment based on the amount of change per predetermined time of the measurement value measured by the temperature sensor 110.
　このように本第３の実施の形態においては、電子機器１００は、温度センサ１１０における測定値をそのまま利用するのではなく、測定値の所定時間あたりの変化量に基づいて着脱の発生を検出している。 As described above, in the third embodiment, the electronic device 100 does not use the measurement value of the temperature sensor 110 as it is, but detects the occurrence of attachment / detachment based on the change amount of the measurement value per predetermined time. ing.
　従って、例えば、１つの測定値に誤差があったとしても、他の測定値とともにその変化量が算出されるため、その誤差は変化量に吸収され、１つの測定値をそのまま利用する場合と比較して、着脱の発生を正確に検出することが可能となる。 Therefore, for example, even if there is an error in one measurement value, the amount of change is calculated together with other measurement values, so the error is absorbed in the amount of change and compared with the case where one measurement value is used as it is. Thus, the occurrence of attachment / detachment can be accurately detected.
　また、例えば、照度センサが電子機器１００の利用者の体に装着する装着面側に備えられている場合において、照度センサを利用して着脱判定を行う場合がある。この場合、上述したように、電子機器１００の装着面側を太陽光に向けると、照度センサが太陽光を直接受光するため、着脱の発生を誤検出する場合がある。 Also, for example, when the illuminance sensor is provided on the mounting surface side to be worn on the user's body of the electronic device 100, the attachment / detachment determination may be performed using the illuminance sensor. In this case, as described above, when the mounting surface side of the electronic device 100 is directed to sunlight, the illuminance sensor directly receives sunlight, so that the attachment / detachment may be erroneously detected.
　本第３の実施の形態における電子機器１００は、温度センサ１１０による測定値の変化量に基づいて着脱の発生を検出する。そのため、例えば、図６や図７（Ａ）に示すように、利用者が電子機器１００を取り外した後、装着面側を太陽光に向けた場合、装着面を太陽光に向けない場合と同様の測定結果を得た。従って、例えば、利用者が電子機器１００を取り外した後、電子機器１００の装着面側を太陽光に向けてひっくり返すような場合であっても、着脱の発生を正確に検出することが可能となる。 The electronic device 100 according to the third embodiment detects the occurrence of attachment / detachment based on the amount of change in the value measured by the temperature sensor 110. Therefore, for example, as shown in FIG. 6 and FIG. 7A, after the user removes the electronic device 100, when the mounting surface side is directed to sunlight, the same as when the mounting surface is not directed to sunlight. The measurement result was obtained. Therefore, for example, even when the user removes the electronic device 100 and then turns the mounting surface side of the electronic device 100 toward sunlight, it is possible to accurately detect the occurrence of attachment / detachment. .
　［その他の実施の形態］
　次にその他の実施の形態について説明する。 [Other embodiments]
Next, other embodiments will be described.
　着脱判定で使用される閾値については、±Ａ，±Ｂの４つを用いる例について説明した。例えば、Ｔａ＜Ｔｂの場合で使用される閾値を＋Ａ，－Ｂと、Ｔａ＞Ｔｂで用いる閾値を＋Ｃ，－Ｄなど、＋と－の関係性がない閾値であってもよい。この場合、Ｔａ＜Ｔｂ、かつ、Ｔａ＞Ｔｂの場合に使用される閾値も、＋Ａと＋Ｂに代えて、それぞれ＋Ｅ（又は第５の閾値）と＋Ｆ（又は第６の閾値）であってもよい。 As for the threshold value used in the attachment / detachment determination, an example using four of ± A and ± B has been described. For example, thresholds having no relationship between + and − may be used, such as threshold values used in the case of Ta <Tb, such as + A and −B, and threshold values used in Ta> Tb of + C and −D. In this case, the threshold values used when Ta <Tb and Ta> Tb are also + E (or the fifth threshold value) and + F (or the sixth threshold value), respectively, instead of + A and + B. Good.
　また、このような閾値は、電子機器１００内のメモリに保持されてもよく、例えば、ＮＡＮＤメモリ１５２であってもよい。 Further, such a threshold value may be held in a memory in the electronic device 100, for example, a NAND memory 152.
　さらに、プロセッサ１５５の例としては、例えば、ＣＰＵ（Central Processing Unit）、ＭＰＵ（Micro-Processing Unit）、ＤＳＰ（Digital Signal Processor）、ＦＰＧＡ（Field Programmable Gate Array）などのプロセッサやコントローラが用いられてもよい。 Furthermore, as an example of the processor 155, for example, a processor or controller such as a CPU (Central Processing Unit), an MPU (Micro-Processing Unit), a DSP (Digital Signal Processor), or an FPGA (Field Programmable Gate Array) may be used. Good.
　また、上述した電子機器１００は、例えば、速度センサ、磁気センサ、近接センサなど、種々のセンサを備えてもよい。例えば、電子機器１００では、着脱判定処理部１２０における着脱判定の結果と、これらのセンサの測定結果を、無線処理部１４０を介してパーソナルコンピュータへ送信することで、様々なサービスに利用されることが可能となる。 Further, the electronic device 100 described above may include various sensors such as a speed sensor, a magnetic sensor, and a proximity sensor. For example, the electronic device 100 can be used for various services by transmitting the result of attachment / detachment determination in the attachment / detachment determination processing unit 120 and the measurement results of these sensors to the personal computer via the wireless processing unit 140. Is possible.
　さらに、電子機器１００は、例えば、専用に用いられるセンシングバンド、電子メールの送受信や通話など他の機能とともに利用可能であって利用者の体に装着可能なウェアラブル機器、或いは腕時計であってもよい。 Furthermore, the electronic device 100 may be, for example, a wearable device that can be used with other functions such as a dedicated sensing band, transmission / reception of an e-mail, or a call, and can be worn on the user's body, or a wristwatch. .
１００：電子機器　　　　　　　　　　　１００－Ａ：バイタルセンシングユニット
１００－Ｂ：バンドアタッチメント　　　１１０：温度センサ
１１１：温度センサ制御部　　　　　　　１２０：着脱判定処理部
１３０：脈拍センサ　　　　　　　　　　１５５：プロセッサ
１６０：加速度センサ　　　　　　　　　１６２：歩数計処理部 DESCRIPTION OF SYMBOLS 100: Electronic device 100-A: Vital sensing unit 100-B: Band attachment 110: Temperature sensor 111: Temperature sensor control part 120: Detachment determination processing part 130: Pulse sensor 155: Processor 160: Acceleration sensor 162: Pedometer processing part

Claims (7)

  1. 　利用者の体に着脱可能な電子機器であって、
    　外部の温度を測定する温度センサと、
    　前記温度センサで測定された測定値の所定時間あたりの変化量に基づいて、前記電子機器の着脱の発生を検出する着脱判定処理部と
    　を備えることを特徴とする電子機器。     An electronic device that can be attached to and detached from a user's body,
    A temperature sensor that measures the external temperature;
    An electronic device comprising: an attachment / detachment determination processing unit configured to detect occurrence of attachment / detachment of the electronic device based on a change amount per predetermined time of a measurement value measured by the temperature sensor.
  2. 　更に、前記電子機器の加速度を測定する加速度センサを備え、
    　前記着脱判定処理部は、前記加速度センサによって、前記電子機器を利用する利用者の歩数が検出されたとき、前記電子機器の着脱の発生を検出しないことを特徴とする請求項１記載の電子機器。     Furthermore, an acceleration sensor for measuring the acceleration of the electronic device is provided,
    The electronic device according to claim 1, wherein the attachment / detachment determination processing unit does not detect occurrence of attachment / detachment of the electronic device when the acceleration sensor detects the number of steps of a user who uses the electronic device. .
  3. 　前記着脱判定処理部は、利用者の体温が空気の温度よりも高いときにおいて、前記変化量が第１の閾値以上のとき、前記電子機器が利用者の体に装着されたと判定し、前記変化量が第２の閾値（＜第１の閾値）未満のとき、前記電子機器が利用者の体から取り外されたと判定することを特徴とする請求項１記載の電子機器。 The attachment / detachment determination processing unit determines that the electronic device is attached to the user's body when the body temperature of the user is higher than the temperature of the air and the amount of change is equal to or greater than a first threshold. The electronic device according to claim 1, wherein when the amount is less than a second threshold (<first threshold), it is determined that the electronic device has been removed from the user's body.
  4. 　前記着脱判定処理部は、空気の温度が利用者の体温よりも高いときにおいて、前記変化量が第３の閾値未満のとき、前記電子機器が利用者の体に装着されたと判定し、前記変化量が第４の閾値（＞第３の閾値）以上のとき、前記電子機器が利用者の体から取り外されたと判定することを特徴とする請求項１記載の電子機器。 The attachment / detachment determination processing unit determines that the electronic device is attached to the user's body when the amount of change is less than a third threshold when the temperature of the air is higher than the body temperature of the user. 2. The electronic device according to claim 1, wherein when the amount is equal to or greater than a fourth threshold (> third threshold), it is determined that the electronic device has been removed from the user's body.
  5. 　前記着脱判定処理部は、前記変化量の絶対値が第１の閾値以上のとき、前記電子機器が利用者の体に装着されたと判定し、前記変化量の絶対値が第４の閾値（＜第１の閾値）以上で、かつ、前記第１の閾値未満のとき、前記電子機器が利用者の体から取り外されたと判定することを特徴とする請求項１記載の電子機器。 When the absolute value of the change amount is equal to or greater than a first threshold value, the attachment / detachment determination processing unit determines that the electronic device is attached to the user's body, and the absolute value of the change amount is a fourth threshold value (< 2. The electronic device according to claim 1, wherein the electronic device is determined to have been removed from the user's body when the first threshold value is equal to or greater than the first threshold value and less than the first threshold value.
  6. 　更に、利用者の脈拍を検出する脈拍センサを備え、
    　前記着脱判定処理部は、前記電子機器が利用者の体に装着されたと判定したとき、前記脈拍センサを動作させ、前記電子機器が利用者の体から取り外されたと判定したとき、前記脈拍センサを動作させないようにすることを特徴とする請求項３記載の電子機器。     Furthermore, a pulse sensor for detecting the user's pulse is provided,
    The attachment / detachment determination processing unit operates the pulse sensor when it is determined that the electronic device is attached to the user's body, and when the electronic device is determined to be removed from the user's body, the pulse sensor is 4. The electronic apparatus according to claim 3, wherein the electronic apparatus is not operated.
  7. 　温度センサを有し、利用者の体に着脱可能な電子機器におけるコンピュータにおいて実行可能な着脱検知プログラムであって、
    　前記温度センサに外部の温度を測定させ、
    　前記温度センサで測定された測定値の所定時間あたりの変化量に基づいて、前記電子機器の着脱の発生を検出する
    　処理を前記コンピュータに実行させることを特徴とする着脱検知プログラム。     An attachment / detachment detection program that can be executed by a computer in an electronic device that has a temperature sensor and can be attached to and detached from a user's body
    Let the temperature sensor measure the external temperature,
    An attachment / detachment detection program for causing the computer to execute processing for detecting occurrence of attachment / detachment of the electronic device based on a change amount per predetermined time of a measurement value measured by the temperature sensor.
PCT/JP2016/082314 2016-10-31 2016-10-31 Electronic device and wearing/removal detection program WO2018078871A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/082314 WO2018078871A1 (en) 2016-10-31 2016-10-31 Electronic device and wearing/removal detection program

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/082314 WO2018078871A1 (en) 2016-10-31 2016-10-31 Electronic device and wearing/removal detection program

Publications (1)

Publication Number Publication Date
WO2018078871A1 true WO2018078871A1 (en) 2018-05-03

Family

ID=62024624

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/082314 WO2018078871A1 (en) 2016-10-31 2016-10-31 Electronic device and wearing/removal detection program

Country Status (1)

Country Link
WO (1) WO2018078871A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014136140A (en) * 2013-01-18 2014-07-28 Nara Medical Univ Light exposure quantity measuring device, circadian rhythm measuring device and utilization thereof
JP2015179340A (en) * 2014-03-18 2015-10-08 株式会社東芝 Electronic apparatus and control method for the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014136140A (en) * 2013-01-18 2014-07-28 Nara Medical Univ Light exposure quantity measuring device, circadian rhythm measuring device and utilization thereof
JP2015179340A (en) * 2014-03-18 2015-10-08 株式会社東芝 Electronic apparatus and control method for the same

Similar Documents

Publication Publication Date Title
KR102319707B1 (en) A mask having a light generating unit reacting with fine dust concentration
US10258267B2 (en) Pulse oximeter with an accelerometer
US10527491B2 (en) Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure
JP5414173B2 (en) Pulse wave measuring device
TWI651891B (en) Power adjustment module and wearable device having same
JP2020503750A (en) Determining the proximity of the transmission antenna to the human body to limit the transmitted output power
JP3157604U (en) Portable environmental information notification device
JP2016533011A5 (en)
US20180224326A1 (en) Methods, systems, and apparatuses for accurate measurement and real-time feedback of solar ultraviolet exposure
WO2015139980A1 (en) Heart rate monitor device
JP2018509197A5 (en)
JP2018108372A (en) Worn-type body temperature monitoring device and method
NL2017538B1 (en) Wireless vital sign monitoring
KR20180137515A (en) Integrated thermal physiological stress alert device
ITPD20100087A1 (en) INFRARED THERMOMETER PARTICULARLY FOR CLINICAL USE
WO2018078871A1 (en) Electronic device and wearing/removal detection program
US20170077560A1 (en) Wireless monitor for detecting and indicating a condition of a battery
WO2016047136A1 (en) Measurement device and measurement method
EP3248538A1 (en) Control device, detection device, and control method
JP2011251007A (en) Bio-pulse wave sensor and bio-pulse wave measuring device
US20180116624A1 (en) Operation device, control method, and x-ray imaging unit
JP2009063171A5 (en)
WO2021022951A1 (en) An earpiece capable of interacting with the tragus and a method of providing continuous physiological detection
WO2017130570A1 (en) Pulse measuring device
CN205334070U (en) Radiation is surveyed and radiation warning wrist -watch

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16920190

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16920190

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP