WO2012008207A9 - 運動検出装置、および、運動検出装置の制御方法 - Google Patents
運動検出装置、および、運動検出装置の制御方法 Download PDFInfo
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- WO2012008207A9 WO2012008207A9 PCT/JP2011/060579 JP2011060579W WO2012008207A9 WO 2012008207 A9 WO2012008207 A9 WO 2012008207A9 JP 2011060579 W JP2011060579 W JP 2011060579W WO 2012008207 A9 WO2012008207 A9 WO 2012008207A9
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/40—Data acquisition and logging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
- A61B5/1118—Determining activity level
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/22—Ergometry; Measuring muscular strength or the force of a muscular blow
- A61B5/221—Ergometry, e.g. by using bicycle type apparatus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6823—Trunk, e.g., chest, back, abdomen, hip
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/683—Means for maintaining contact with the body
- A61B5/6831—Straps, bands or harnesses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C22/00—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers
- G01C22/006—Pedometers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
- A61B2560/0247—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value
- A61B2560/0257—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value using atmospheric pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0219—Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
-
- 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
- A61B5/02042—Determining blood loss or bleeding, e.g. during a surgical procedure
Definitions
- the present invention relates to a motion detection device and a control method for the motion detection device, and more particularly to a motion detection device suitable for calculating a motion state related to walking or running and a control method for the motion detection device.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2005-2005
- Patent Document 1 Japanese Patent Application Laid-Open No. 2005-2005
- Patent Document 1 Japanese Patent Application Laid-Open No. 2005-2005
- the present invention has been made to solve the above-described problems, and one of its purposes is a motion detection device capable of reducing erroneous discrimination of a user's motion state, and control of the motion detection device. Is to provide a method.
- a motion detection device includes a main body, a control unit, a storage unit, and a detection unit.
- the control unit includes: a first determination unit that determines body movement from the data detected by the detection unit; and a second determination unit that determines a movement state for each body movement from the data detected by the detection unit.
- the second determination unit includes a correction unit that corrects the movement state based on a predetermined rule, and the control unit further includes determination results of the first determination unit and the second determination unit, respectively.
- the calculation unit for calculating the exercise state of the user and the storage unit for storing the exercise state calculated by the calculation unit in the storage unit.
- the predetermined rule is a rule that corrects an abnormal transition different from that which can occur in a transition of a motion state between a body motion to be discriminated and a body motion before and after that to a non-abnormal transition. is there.
- the abnormal transition is the motion state of the first and last body motion.
- the non-abnormal transition is the first and last movement This is a transition in which the motion state of the body motion is the same and the motion state of the body motion included in the range is the same.
- the exercise state is a combination of a walking state and an ascending / descending state.
- the detection unit detects an acceleration value in at least one axial direction, and the calculation unit calculates a walking state among the user's motion states based on the acceleration value detected by the detection unit.
- the detection unit detects a value of the absolute pressure
- the calculation unit discriminates the lifting / lowering state of the user's movement state based on the absolute pressure value detected by the detection unit.
- control unit is further specified by an exercise intensity specifying unit that specifies exercise intensity based on the exercise state stored in the storage unit, and a duration and exercise intensity specifying unit of each of the exercise states stored in the storage unit
- a momentum calculating unit that calculates the amount of exercise using the exercise intensity.
- the control method of the motion detection device is a control method including a main body unit, a control unit, a storage unit, and a detection unit.
- the control method of the motion detection device includes a step in which the control unit determines body movement from the data detected by the detection unit, a step of determining a movement state for each body movement from the data detected by the detection unit, The method includes a step of correcting the movement state based on a predetermined rule, a step of calculating the user's exercise state from the determined result, and a step of storing the calculated exercise state in the storage unit.
- the motion detection device and the control method of the motion detection device determine the body movement and the movement state for each body movement from the detected data, and correct the movement state based on a predetermined rule.
- the user's exercise state is calculated from the determined result, and the calculated exercise state is stored.
- the motion detection device not only measures the number of steps, but also measures the amount of activity (also referred to as the amount of exercise) in exercise and daily activities (for example, vacuuming, carrying light luggage, cooking, etc.).
- the embodiment will be described as a possible activity meter.
- FIG. 1 is an external view of an activity meter 100 according to the embodiment of the present invention.
- the activity meter 100 is mainly composed of a main body portion 191 and a clip portion 192.
- the clip unit 192 is used to fix the activity meter 100 to a user's clothes or the like.
- the main body 191 includes a display change / decision switch 131, a left operation / memory switch 132, a right operation switch 133, and a part of a display unit 140, which will be described later.
- a display 141 is provided.
- display 141 is configured by a liquid crystal display (LCD), but is not limited thereto, and may be another type of display such as an EL (ElectroLuminescence) display. Good.
- LCD liquid crystal display
- EL ElectroLuminescence
- FIG. 2 is a diagram showing a usage state of the activity meter 100 in this embodiment.
- activity meter 100 is attached to a belt on a user's waist using clip portion 192, for example.
- the activity meter 100 is not limited to this, and the activity meter 100 may be designed to be used by being worn on other parts of the user's body, or may be used by the user in a bag or the like. May be designed.
- FIG. 3 is a block diagram showing an outline of the configuration of the activity meter 100 in this embodiment.
- activity meter 100 includes a control unit 110, a memory 120, an operation unit 130, a display unit 140, an acceleration sensor 170, an atmospheric pressure sensor 180, and a power source 190. Further, the activity meter 100 may include a sound report unit for outputting sound and an interface for communicating with an external computer.
- the control unit 110, the memory 120, the operation unit 130, the display unit 140, the acceleration sensor 170, the atmospheric pressure sensor 180, and the power source 190 are built in the main body unit 191 described with reference to FIG.
- the operation unit 130 includes the display change / decision switch 131, the left operation / memory switch 132, and the right operation switch 133 described with reference to FIG. 1, and an operation signal indicating that these switches have been operated is sent to the control unit 110. Send.
- the acceleration sensor 170 is a semiconductor type of MEMS (Micro Electro Mechanical Systems) technology, but is not limited to this, and may be of another type such as a mechanical type or an optical type. In the present embodiment, acceleration sensor 170 outputs a detection signal indicating the acceleration in each of the three axial directions to control unit 110. However, the acceleration sensor 170 is not limited to the three-axis type, and may be one-axis or two-axis type.
- MEMS Micro Electro Mechanical Systems
- the atmospheric pressure sensor 180 is of a MEMS technology, but is not limited to this and may be of another type.
- the atmospheric pressure sensor 180 outputs a detection signal indicating the ambient atmospheric pressure value (absolute pressure in the present embodiment) to the control unit 110.
- the memory 120 includes non-volatile memory such as ROM (Read Only Memory) (for example, flash memory) and volatile memory such as RAM (Random Access Memory) (for example, SDRAM (synchronous Dynamic Random Access Memory)).
- ROM Read Only Memory
- RAM Random Access Memory
- SDRAM synchronous Dynamic Random Access Memory
- the memory 120 includes program data for controlling the activity meter 100, data used for controlling the activity meter 100, setting data for setting various functions of the activity meter 100, and the number of steps and activities. Measurement result data such as quantity is stored every predetermined time (for example, every day). The memory 120 is used as a work memory when the program is executed.
- the control unit 110 includes a CPU (Central Processing Unit), and according to an operation signal from the operation unit 130 according to a program for controlling the activity meter 100 stored in the memory 120, the acceleration sensor 170 and the atmospheric pressure sensor 180.
- the memory 120 and the display unit 140 are controlled on the basis of the detection signal from.
- the display unit 140 includes the display 141 described with reference to FIG. 1 and controls the display 141 to display predetermined information according to a control signal from the control unit 110.
- the power source 190 includes a replaceable battery, and supplies power from the battery to each unit that requires power to operate, such as the control unit 110 of the activity meter 100.
- FIG. 4 is a functional block diagram showing an outline of the functions of the activity meter 100 in this embodiment.
- control unit 110 of activity meter 100 includes walking detection unit 111, atmospheric pressure smoothing unit 112, atmospheric pressure change amount evaluation unit 113, behavior evaluation unit 114, and identification behavior correction unit. 115, an exercise intensity evaluation unit 116, and an exercise amount evaluation unit 117.
- these units included in the control unit 110 are executed by the control unit 110 by executing software for executing processing to be described later with reference to FIGS. 5 to 9. 110.
- control unit 110 may be configured inside the control unit 110 as a hardware circuit.
- the walking detection unit 111 is a walking of a user who wears or carries the activity meter 100 based on the values of the accelerations in the three axes from the acceleration sensor 170, that is, the values of the X-axis acceleration, the Y-axis acceleration, and the Z-axis acceleration. Is detected. Then, the walking detection unit 111 outputs the detected walking timing to the atmospheric pressure smoothing unit 112 and the behavior evaluation unit 114.
- the walking detection unit 111 When no walking is detected, the walking detection unit 111 outputs a message to that effect to the atmospheric pressure smoothing unit 112 and the behavior evaluation unit 114 every predetermined time T (for example, 1) seconds.
- the atmospheric pressure smoothing unit 112 Based on the atmospheric pressure value P from the atmospheric pressure sensor 180 and the walking timing from the walking detection unit 111, the atmospheric pressure smoothing unit 112 performs five steps from two steps before and two steps after the determination target timing.
- the average value of the atmospheric pressure values in the range is calculated as the smoothed atmospheric pressure Pma for each discrimination target timing.
- the timing of the discrimination target is every step of the walking timing.
- the atmospheric pressure smoothing unit 112 When the atmospheric pressure smoothing unit 112 receives from the walking detection unit 111 that walking is not detected, the atmospheric pressure smoothing unit 112 averages the atmospheric pressure values in the range of 4 T seconds from 2 T seconds before to 2 T seconds after the determination target timing. Is calculated as the smoothed atmospheric pressure P ma at every timing of the discrimination target every T seconds.
- the average value of the atmospheric pressure in the range of 5 steps (4T seconds) is calculated.
- the present invention is not limited to this, and the range for calculating the average value is M frame (steps) (M frame is (Natural number) range.
- the smoothed atmospheric pressure is calculated for each step (T seconds), but the present invention is not limited to this, and the smoothed atmospheric pressure is calculated for each N frame (steps) (N frame is a natural number). It may be.
- FIG. 5 is a graph showing an example of processing performed by the atmospheric pressure smoothing unit 112 and the atmospheric pressure change amount evaluating unit 113 of the control unit 110 of the activity meter 100 in this embodiment.
- the horizontal axes of the four graphs indicate time t (s).
- the vertical axis of the first graph indicates the change in the atmospheric pressure value P (hPa) input from the atmospheric pressure sensor 180 to the control unit 110.
- the vertical axis of the second graph shows the change in the smoothed atmospheric pressure P ma (hPa).
- the atmospheric pressure change amount evaluation unit 113 determines the timing of the determination target from the smoothed atmospheric pressure one step before the determination target timing based on the smoothed atmospheric pressure from the atmospheric pressure smoothing unit 112. A change amount P diff (hPa) to the smoothed atmospheric pressure is calculated.
- the atmospheric pressure change amount evaluating unit 113 discriminates from the smoothed atmospheric pressure a predetermined time T seconds before the discrimination target timing based on the smoothed atmospheric pressure from the atmospheric pressure smoothing unit 112.
- a change amount P diff (hPa) of the target timing to the smoothed atmospheric pressure is calculated.
- the vertical axis of the third graph shows the change in the change amount P diff .
- the threshold values Th up and Th down are threshold values for the smoothed atmospheric pressure change amount P diff , which are walking or stopping on a flat ground and rising or falling, for each step.
- the atmospheric pressure change amount evaluation unit 113 sets the value of the atmospheric pressure change identification result Act diff to 1 when the change amount P diff of the timing to be discriminated is less than the threshold Th up , that is, the discrimination It is assumed that the operation state at the target timing is an operation state where there is a high possibility that the operation state will be increased.
- the atmospheric pressure change amount evaluation unit 113 sets the value of the atmospheric pressure change identification result Act diff to 0 when the change amount P diff of the timing to be discriminated is not less than the threshold Th up and not more than the threshold Th down .
- the operation state at the timing of the discrimination target is an operation state that is highly likely to be a flat ground walking or a stop.
- the atmospheric pressure change amount evaluation unit 113 sets the value of the atmospheric pressure change identification result Act diff to ⁇ 1, that is, the discrimination target timing. It is assumed that the operation state is an operation state that is highly likely to be lowered.
- the vertical axis of the fourth graph indicates the change in the atmospheric pressure change identification result Act diff .
- the first to fifth, seventh, eleventh, and thirteenth to fifteenth plots are in the range from the threshold Th up to the threshold Th down.
- the value of the pressure change identification result Act diff corresponding to is set to 0.
- the sixth, eighth to tenth plots are in a range larger than the threshold value Th down , so in the fourth graph, the value of the pressure change identification result Act diff corresponding to these plots is ⁇ It is set to 1.
- the twelfth plot is in a range less than the threshold value Th up , and therefore, in the fourth graph, the value of the pressure change identification result Act diff corresponding to this plot is set to 1.
- the atmospheric pressure change amount evaluation unit 113 determines the average value of the range of five steps from two steps before and two steps after the determination target timing based on the atmospheric pressure change identification result Act diff as the identification result.
- the moving average Act ma is calculated for each step of the discrimination target timing, that is, the walking timing.
- the atmospheric pressure change amount evaluation unit 113 uses the average value in the 4T second range from 2T seconds before to 2T seconds after the timing of the discrimination target as the identification result moving average Act ma for T seconds. It is calculated for each timing of each discrimination target.
- FIG. 6 is a graph showing a continuation of an example of processing performed in the atmospheric pressure change amount evaluation unit 113 of the activity meter control unit 110 in this embodiment.
- the horizontal axis of the three graphs indicates time t (s).
- the first graph is the same as the fourth graph in FIG.
- the vertical axis of the graph in the second stage shows the change of the identification results moving average Act ma.
- the atmospheric pressure change amount evaluation unit 113 calculates the average value of the range of five steps in the first-stage graph as the identification result moving average Act ma indicated by the plot of the second-stage graph.
- the atmospheric pressure change amount evaluation unit 113 sets the value of the lift state identification result Act adj to 1 when the discrimination result moving average Act ma of the discrimination target timing is larger than the threshold value 0.5, that is, the discrimination Assume that the ascending / descending state before the correction of the target timing is ascending.
- the threshold value of the identification result moving average Act ma is not limited to 0.5, and may be another value.
- the atmospheric pressure change amount evaluation unit 113 sets the value of the lifting / lowering state identification result Act adj to 0 when the identification result moving average Act ma of the discrimination target timing is equal to or less than the threshold value 0.5 and the threshold value ⁇ 0.5 or more. In other words, it is assumed that the ascending / descending state before correction of the timing to be discriminated is not ascending / descending.
- the atmospheric pressure change amount evaluation unit 113 sets the value of the lifting / lowering state identification result Act adj to ⁇ 1 when the identification result moving average Act ma of the determination target timing is less than the threshold ⁇ 0.5, that is, the determination target It is assumed that the ascending / descending state before the timing correction is descent.
- the vertical axis of the third graph shows the change in the lift state identification result Act adj .
- the 1st to 6th, 11th to 13th and 15th plots have a threshold value of 0.5 or less and the threshold value of ⁇ 0.5 or more, and therefore correspond to these plots in the third graph.
- the value of the lift state identification result Act adj is set to 0.
- the seventh to tenth plots are in the range less than the threshold value ⁇ 0.5. Therefore, in the third graph, the value of the lift state identification result Act adj corresponding to these plots is ⁇ 1. Is done.
- the 14th plot is in a range larger than the threshold value 0.5, and therefore, in the third graph, the value of the lift state identification result Act adj corresponding to this plot is set to 1.
- the behavior evaluation unit 114 is based on the fact that the walking timing or the walking from the walking detection unit 111 is not detected and the lift state identification result Act adj from the atmospheric pressure change evaluation unit 113. , To identify the operating state (also referred to as “behavior type”).
- FIG. 7 is a diagram showing a condition for identifying an action type by the action evaluation unit 114 of the control unit 110 of the activity meter 100 according to this embodiment.
- the atmospheric pressure change amount evaluation unit 113 identifies that the ascending / descending state is ascending, when there is gait detection, the operating state is ascending stairs. Identified.
- the amount of change S of the atmospheric pressure from the predetermined time before the determination target timing is large, that is, if it is equal to or greater than the threshold value S th , the elevator rises and the amount of change S is small. If it is less than the threshold value S th , it is identified that the escalator is rising.
- the atmospheric pressure change amount evaluation unit 113 identifies the moving state at the determination target timing as being lowered, if the walking is detected, the moving state is identified as stairs descending.
- the amount of change S of the atmospheric pressure from a predetermined time before the determination target timing is large, that is, if it is equal to or greater than the threshold S th , the elevator descent, the amount of change S is small, if it is less than the threshold value S th, it is identified as the descent of the escalator.
- the atmospheric pressure change amount evaluating unit 113 identifies the movement state at the determination target timing as non-lifting, if the walking is detected, the movement state is identified as walking on a flat ground. Moreover, when there is no walking detection, it is identified as a stop.
- the walking state is set to 1 when there is walking detection.
- the walking state is 1, if it is identified that the stairs are rising, the rising / lowering state is 1, and if it is identified that the stairs are descending, the lifting state is -1 and is identified as walking on a flat ground. In this case, the raising / lowering state is set to zero.
- the walking state is 0.
- the lift state is 2
- the lift state is 1, and it is stopped.
- the lift state is set to 0
- the lift state is set to -1
- the lift state is set to -2.
- the identification behavior correction unit 115 corrects the behavior type based on the behavior type (operation state) at each discrimination target timing from the behavior evaluation unit 114.
- FIG. 8 is a first diagram for explaining the basic concept of correction by the identification behavior correction unit 115 of the control unit 110 of the activity meter 100 in this embodiment.
- FIG. 9 is a second diagram for explaining the basic concept of correction by the identification behavior correction unit 115 of the control unit 110 of the activity meter 100 in this embodiment.
- the next operation state is the same operation state (“walking on a flat ground”), “stationary (stop, elevator lift, escalator lift)” , “Step up” or “step down”.
- step up When the operation state is “step up”, the next operation state can be changed to the same operation state (“step up”), “stationary (stop)”, “flat walk”, or “step down”. .
- next operation state may transition to the same operation state (“step down”), “still (stop)”, “flat walk”, or “step up” .
- the next operating state is the same operating state (“still (stopped, lifted elevator, lowered elevator)”), “flat ground walking”, “stairs up”, or Transition to “Stairs Down”.
- the next operation state can be changed to the same operation state (“stationary (stop, elevator up))” or “flat ground walking”.
- the next operation state can be changed to the same operation state (“stationary (stop, elevator descent)”) or “flat ground walking”.
- the next operation state can be changed to the same operation state (“stationary (escalator rising))” or “flat ground walking”.
- the next operation state can be changed to the same operation state (“stationary (escalator down)”) or “flat ground walking”.
- the operation states of the first and last unit walks are the same, and the unit walks of the operation states different from the operation states of the first and last unit walks are performed. It is assumed that the transition of the operation state when less than half of the unit walks included in the range is an abnormal transition.
- This abnormal transition is a non-abnormality in which the operation state of the first and last unit walks is the same in a certain number of unit walk ranges, and the operation states of the unit walks included in the range are the same. Establish rules to correct for transitions.
- the unit walk is one step and the predetermined number is five steps, it is as follows.
- the operation states of the first step and the fifth step flat ground walking, stair climbing, or stair descent
- the transition of the operation state when less than 2.5 steps (1 step or more) are included is assumed to be an abnormal transition.
- a rule in which this abnormal transition is corrected to a non-abnormal transition that is a transition in which the operation states of the first step and the fifth step are the same and the operation states included in the range are the same in the range of five steps. Determine.
- FIG. 10A is a first diagram illustrating an example in which the operation state is corrected by the identification behavior correction unit 115 of the control unit 110 of the activity meter 100 in this embodiment.
- FIG. 10B is a second diagram illustrating an example in which the operation state is corrected by the identification behavior correction unit 115 of the control unit 110 of the activity meter 100 according to this embodiment.
- the operation state of the first step and the fifth step is the same, and the operation state different from the operation state of the first step and the fifth step is one step (3 Step) and less than 2.5 steps (1 step or more), and thus abnormal transition.
- this abnormal transition is corrected to a non-abnormal transition in which the operation states of the first step and the fifth step are the same and the operation states included in the range are the same. That is, the operation state at the third step is corrected to the same operation state as the first, second, fourth, and fifth steps.
- the transition of the operation state is the same in the operation state of the first step and the fifth step, and the operation state different from the operation state of the first step and the fifth step is two steps. (2nd step and 3rd step) and less than 2.5 steps (1 step or more) are included, and therefore abnormal transition.
- this abnormal transition is corrected to a non-abnormal transition in which the operation states of the first step and the fifth step are the same and the operation states included in the range are the same. That is, the operation state of the second step and the third step is corrected to the same operation state as the first, fourth, and fifth steps.
- FIG. 11A is a first diagram illustrating an example of a case where the operation state is not corrected by the identification behavior correction unit 115 of the control unit 110 of the activity meter 100 in this embodiment.
- FIG. 11B is a second diagram illustrating an example in which the operation state is not corrected by the identification behavior correction unit 115 of the control unit 110 of the activity meter 100 according to this embodiment.
- the transition of the operation state is not an abnormal transition because the operation states of the first step and the fifth step are not the same. For this reason, no correction is made.
- this operation state transition has the same operation state at the first step and the fifth step, but the operation state different from the operation state at the first step and the fifth step is three steps ( 2nd to 4th steps), and 2.5 steps or more are included, so no abnormal transition is made. For this reason, no correction is made.
- FIG. 12 is a graph showing an example of processing performed by the identification behavior correction unit 115 of the control unit 110 of the activity meter 100 in this embodiment.
- the horizontal axes of the two graphs indicate time t (s).
- the first graph is the same as the third graph in FIG.
- the vertical axis of the second graph shows the change in the operation state identification correction result Act.
- the operating states of the first step and the fifth step are the same, but the operations different from the operating states of the first step and the fifth step Since the state is not included, it is not an abnormal transition. For this reason, no correction is made. Therefore, the value of the lift state identification result Actadj is directly used as the value of the operation state identification correction result Act.
- the 3rd to 7th, 4th to 8th, 5th to 9th, 6th to 10th, 7th to 11th, 8th to 12th, 9th to 13th and 10th to 14th plots Since the operating states of the first step and the fifth step are different, no abnormal transition is made. For this reason, no correction is made. Therefore, the value of the lift state identification result Actadj is directly used as the value of the operation state identification correction result Act.
- the 11th to 15th plots have the same operation state at the first step and the fifth step, and one operation state different from the operation state at the first step and the fifth step.
- This is an abnormal transition because it is a step (fourth step) and includes less than 2.5 steps (one step or more).
- this abnormal transition is corrected to a non-abnormal transition in which the operation states of the first step and the fifth step are the same and the operation states included in the range are the same. That is, the operation state of the fourth step (14th plot) is changed to “0”, which is the same operation state as the first to third and fifth steps (11th to 13, 15th plots), that is, “flat ground walking”. to correct. Accordingly, the value of the lift state identification result Actadj is corrected to be the value of the operation state identification correction result Act.
- the exercise intensity evaluation unit 116 specifies the exercise intensity according to the operation state at the timing of each discrimination target specified by the discrimination behavior correction unit 115. Specifically, for example, based on the description in the reference document (Exercise Review Committee for Exercise Requirements / Exercise Guidelines, “Exercise Guidelines 2006 for Health Promotion”, July 2006), stair climbing, walking on flat ground, In addition, it is assumed that the exercise intensities for descending the stairs are 8.0 mets, 3.0 mets, and 3.0 mets. In addition, stop (standing) and raising / lowering by an automatic machine are assumed to be 1.2 mets.
- FIGS. 13 to 17 are first to fifth flowcharts showing the flow of action identification processing executed by the control unit 110 of the activity meter 100 in this embodiment, respectively.
- control unit 110 of activity meter 100 sets initial values of variables i, n, k, and j to 0, 0, K, and J, respectively.
- variable i indicates the number of steps.
- variable n indicates the number of atmospheric pressure recording data Pl (n) described later.
- the variable k indicates the number of the temporary storage variable D diff (k) of the atmospheric pressure change identification result.
- the constant K indicates the memory size of D diff (k).
- the variable j indicates the number of the temporary storage variable D adj (j) of the lift state identification result.
- the constant J indicates the memory size of D adj (j).
- step S102 the control unit 110 executes a walking detection process.
- the walking detection process the following process is performed. Based on the acceleration value from acceleration sensor 170, control unit 110 detects the walking of the user who wears or carries activity meter 100. If no walking is detected, detection of walking is repeated. When one step of walking is detected, the walking detection process is terminated.
- step S111 the control unit 110 adds 1 to the value of the variable i.
- step S113 the control unit 110 substitutes the value of the atmospheric pressure data P (m) for the atmospheric pressure recording data Pl (n).
- step S114 the control unit 110 substitutes the value of variable n to walking flag acquisition time number N i.
- the value n of the variable n is sequentially added to the atmospheric pressure recording data Pl (n) to the memory size of the atmospheric pressure recording data Pl (n).
- the average value of the atmospheric pressure values in the range of 5 steps from the 2nd step before the 2nd step of the discrimination target timing is defined as the smoothed atmospheric pressure Pma .
- the action identification process shown in this flowchart is a real-time process in which the timing at which a corrected motion state is obtained for a walk at a certain timing is before the next walk timing.
- the average value of the atmospheric pressure values in the range of 5 steps from 5 steps before the timing to 1 step before is defined as the smoothed atmospheric pressure P ma (i).
- step S122 the control unit 110 stores the value of the smoothed atmospheric pressure P ma (i) in the temporarily stored variable D ma2 of the smoothed atmospheric pressure. .
- step S124 the control unit 110 shifts the temporary storage value of the variable D ma2 smoothing atmospheric pressure in the temporary storage variable D ma1 smoothing atmospheric pressure.
- step S134 the value of the atmospheric pressure change identification result Act diff (i) is stored in the temporary storage variable D diff (k) of the atmospheric pressure change identification result.
- the temporarily stored variable D diff (k) of the atmospheric pressure change identification result is incremented by 1 every time the value of the atmospheric pressure change identification result Act diff (i) is substituted, and the atmospheric pressure change
- control unit 110 raises / lowers the value of temporarily stored variable D diff (k-4) of the atmospheric pressure change identification result. Substituted in the state identification result Act adj (i-2). Further, the value of the temporarily stored variable D diff (k-3) of the atmospheric pressure change identification result is substituted into the lift state identification result Act adj (i-1).
- the average value of the 5 steps in the range from two steps before the timing of the discrimination object until after two steps were the identification result moving average Act ma.
- the action identification process shown in this flowchart is a real-time process in which the timing at which a corrected motion state is obtained for a walk at a certain timing is before the next walk timing.
- the average value of the atmospheric pressure change identification results in the range of 5 steps from 4 steps before the timing to the timing is defined as the identification result moving average Act ma (i).
- step S155 the control unit 110 sets the value of the lift state identification result Act adj (i) as the temporary storage variable D adj (j ).
- the temporarily stored variable D adj (j) of the lifting / lowering state identification result is incremented by 1 every time the value of the lifting / lowering state identification result Act adj (i) is substituted,
- step S163 the control unit 110 determines that D adj (j-3) and D adj The value of (j-2) is made equal to the value of D adj (j). Thereafter, the control unit 110 advances the process to be executed to the process of step S171.
- step S165 the control unit 110 determines that D adj (j-3) and D adj The value of (j-1) is made equal to the value of D adj (j). Thereafter, the control unit 110 advances the process to be executed to the process of step S171.
- step S167 the controller 110 determines that D adj (j-2) and D adj The value of (j-1) is made equal to the value of D adj (j). Thereafter, the control unit 110 advances the process to be executed to the process of step S171.
- a threshold value for discriminating the operating state In order to determine and verify a threshold value for discriminating the operating state, data of change in the identification rate of the operating state is acquired while changing the threshold value.
- the number of data of the amount of change P diff of the smoothed atmospheric pressure that was present is calculated.
- the smoothed atmospheric pressure change amount P diff that is identified as stair rise by the threshold value is data that satisfies P diff > Th n when the threshold value is Th n .
- the identification rate of staircase rise increases monotonically as the threshold value Th n is increased from ⁇ 0.1, and reaches 100% around 0 slightly.
- the smoothed atmospheric pressure change amount P diff that is identified as a flat ground walking by the threshold value is data that satisfies ⁇
- the discrimination rate of flat ground walking increases monotonously as the threshold value
- a threshold value Th up that optimizes each identification rate can be determined.
- Th up > 0
- the identification rate of stair climbing increases as the threshold Th up increases, but on the contrary, the identification rate of flat ground walking decreases.
- Th up may be simply determined from the intersection. Th down can be similarly determined.
- FIG. 18 is a graph showing the identification rate of the operation state when the determined threshold value is used when determining and verifying the threshold value for determining the operation state.
- the identification rate of the operation state obtained by performing the correction is dramatically improved. In all cases, the identification rate is 90% or more. It became.
- the activity meter 100 includes the main body unit 191, the control unit 110, the memory 120, the acceleration sensor 170 that detects a value indicating the displacement of the main body unit 191, and the atmospheric pressure. Sensor 180. According to the activity meter 100, it is detected in the determination process of determining the operating state of the user wearing or holding the main body 191 based on the value at a certain determination target timing detected by the acceleration sensor 170 and the atmospheric pressure sensor 180. The timing values before and after the determination target timing are used, and the correction based on the predetermined rule described in FIG. 10 and FIG. 11 is applied to the data of the determination process to determine and determine the operation state. The operating state is stored in the memory 120. Thereby, the misjudgment of a user's operation state can be reduced.
- the predetermined rule is an abnormal transition different from a possible transition in the transition of the operation state between the determination target timing and the timing before and after the determination target timing. Is a rule for correcting non-abnormal transition. As a result, the abnormal operating state transition can be corrected to a non-abnormal operating state transition.
- the abnormal transition has the same operation state at the first step and the fifth step in the operation state for each step in the range, and The transition when the operation state different from the operation state of the first step and the fifth step is less than 2.5 steps, the non-abnormal transition is the same operation state of the first step and the fifth step, and It is a transition in which the operating state in the range is the same.
- the operation state is a combination of a walking state with or without walking, and a rising / lowering state of ascending, descending or non-elevating.
- the acceleration sensor 170 detects acceleration values in the three-axis directions, and in the determination process, the walking state is determined from the user's operation state based on the acceleration value detected by the acceleration sensor 170.
- the absolute pressure value is detected by the atmospheric pressure sensor 180, and in the determination process, the elevation state of the user's operating state is determined based on the absolute pressure value detected by the atmospheric pressure sensor 180.
- the discrimination target timing and the timing before and after it are the timing of each step that is a unit walk. As a result, the operation state can be corrected for each step.
- the discrimination target timing and the timings before and after it are timings every predetermined time T (for example, 1) seconds when no walking is detected. Thereby, even when walking is not detected, the operating state can be corrected.
- the exercise intensity E s (Mets) is specified based on the operation state stored in the memory 120, and the duration E T (time) of each operation state stored in the memory 120 is specified.
- the operation state is corrected according to the rules described with reference to FIGS.
- the present invention is not limited to this and may be as follows.
- the escalator after several steps from the timing determined as the operating state of the escalator rising, or several times the predetermined time T seconds, after the timing determined as the operating state of stop, stair climbing or elevator lifting, the escalator again When it is determined that the operating state is ascending, the operating state during that time may be corrected to the operating state where the escalator is ascending.
- the first and last operating states of the timings included in a range are the same, and the operating states of the timing between them include operating states that do not transition from the first and last operating states, the first and last operating states
- the operating state may be corrected by a rule such as correcting to the above.
- the operation state at the timing of each discrimination target specified by the discrimination behavior correction unit 115 may be displayed on the display unit 140.
- the invention of the device for the activity meter 100 has been described.
- the present invention is not limited to this, and can be understood as an invention of a control method for controlling the activity meter 100.
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Abstract
Description
好ましくは、検出部は、少なくとも1軸方向の加速度の値を検出し、算出部は、検出部によって検出された加速度の値に基づいてユーザの運動状態のうち歩行状態を算出する。
ステップS116およびステップS117の後、ステップS118で、制御部110は、変数iの値が6以上(i>=6)であるか否かを判断する。i<6(ステップS118でNO)であれば、制御部110は、実行する処理をステップS102の処理に戻す。一方、i>=6(ステップS118でYES)であれば、ステップS119で、制御部110は、平滑化大気圧Pma(i)=mean(Pl(Ni-5):Pl(Ni-1))を算出する。
図14を参照して、ステップS118の後、ステップS121で、制御部110は、変数iの値が7以上(i>=7)であるか否かを判断する。i<7(ステップS121でNO)であれば、ステップS126で、制御部110は、平滑化大気圧Pma(i)の値を平滑化大気圧の一時格納変数Dma1に格納して、実行する処理を図13のステップS102の処理に戻す。
一方、i>=7(ステップS121でYES)であれば、ステップS122で、制御部110は、平滑化大気圧Pma(i)の値を平滑化大気圧の一時格納変数Dma2に格納する。そして、ステップS123で、制御部110は、判別対象のタイミングの1歩前の平滑化大気圧から判別対象のタイミングの平滑化大気圧への変化量Pdiff(i)=Dma2-Dma1を算出する。
次に、ステップS141で、制御部110は、変数iの値が11より大きい(i<11)か否かを判断する。i<=11(ステップS141でNO)であれば、ステップS142で、制御部110は、iが11(i==11)であるか否かを判断する。変数iの値が11でなければ(ステップS142でNOであれば)、制御部110は、実行する処理を図13のステップS102に戻す。
Dadj(j)の値が、Dadj(j-1)の値に等しくない(ステップS162でNO)と判断した場合、ステップS164で、制御部110は、Dadj(j)の値が、Dadj(j-2)の値に等しい(Dadj(j)==Dadj(j-2))か否かを判断する。
Dadj(j)の値が、Dadj(j-2)の値に等しくない(ステップS164でNO)と判断した場合、ステップS166で、制御部110は、Dadj(j)の値が、Dadj(j-3)の値に等しい(Dadj(j)==Dadj(j-3))か否かを判断する。
次に、前述した閾値Thup,Thdownの決定方法について説明する。まず、前述の活動量計100の気圧センサ180を装着した男女複数名について、平地歩行、階段上昇、階段下降を、様々な歩調で行なった場合の、大気圧の値の変化のデータを測定して記録する。また、それぞれの歩行のタイミングにおける動作状態(平地歩行、階段上昇または階段下降)も併せて観測して記録する。この記録された値に基づいて、様々な歩調の場合の1歩ごとの平滑化大気圧の変化量Pdiffを計算する。
閾値ごとの平地歩行の識別率は、平地歩行の識別率(%)=(その閾値によって平地歩行と識別される平滑化大気圧の変化量Pdiffのデータの数)/(実際に平地歩行であった平滑化大気圧の変化量Pdiffのデータの数)の式で算出される。なお、その閾値によって平地歩行と識別される平滑化大気圧の変化量Pdiffのデータとは、閾値の値をThnとすると、-|Thn|≦Pdiff≦|Thn|を満たすデータである。平地歩行の識別率は、閾値|Thn|を0.01から増加させていくと、単調増加し、0.1になったときには、100%近くに達する。
(1) 以上説明したように、本実施の形態における活動量計100は、本体部191と、制御部110と、メモリ120と、本体部191の変位を示す値を検出する加速度センサ170および気圧センサ180とを備える。活動量計100によれば、加速度センサ170および気圧センサ180によって検出された或る判別対象タイミングにおける値に基づいて本体部191を装着または所持するユーザの動作状態を判別する判別過程において、検出された判別対象タイミングの前後のタイミングの値が用いられて、図10および図11で説明した予め定められたルールに基づいた補正が判別過程のデータに施されて、動作状態が判別され、判別された動作状態がメモリ120に記憶される。これにより、ユーザの動作状態の誤判別を減少させることができる。
(1) 前述した実施の形態においては、図10および図11で説明したルールで動作状態を補正するようにした。しかし、これに限定されず、次のようにしてもよい。
Claims (8)
- 本体部(191)と、制御部(110)と、記憶部(120)と、検出部(170,180)とを備える運動検出装置(100)であって、
前記制御部は、
前記検出部によって検出されたデータから、体動を判別する第1の判別手段(111)と、
前記検出部によって検出されたデータから、前記体動ごとの移動状態を判別する第2の判別手段(112,113)とを含み、
前記第2の判別手段は、予め定められたルールに基づいて、前記移動状態の補正を行なう補正手段(114,115)を含み、
前記制御部は、さらに、
前記第1の判別手段および前記第2の判別手段それぞれの判別結果から、ユーザの運動状態を算出する算出手段(114,115)と、
前記算出手段によって算出された前記運動状態を前記記憶部に記憶させる記憶手段(115)とを含む、運動検出装置。 - 前記予め定められたルールは、前記判別対象の前記体動とその前後の前記体動との間の前記運動状態の遷移において、起こり得るものとは異なる異常遷移を、非異常遷移に補正するルールである、請求項1に記載の体動検出装置。
- 前記判別対象の体動の前後それぞれ所定数の体動の範囲において、前記算出手段によって算出された前記範囲の前記体動ごとの前記運動状態について、
前記異常遷移は、最初および最後の前記体動の前記運動状態が同一であり、かつ、最初および最後の前記体動の前記運動状態と異なる前記運動状態の前記体動が前記範囲に含まれる前記体動の半数未満含まれる場合の前記遷移であり、
前記非異常遷移は、最初および最後の前記体動の前記運動状態が同一であり、かつ、前記範囲に含まれる前記体動の前記運動状態が同一である前記遷移である、請求項2に記載の運動検出装置。 - 前記運動状態は、歩行状態および昇降状態の組合せである、請求項1に記載の運動検出装置。
- 前記検出部は、少なくとも1軸方向の加速度の値を検出し、
前記算出手段は、前記検出部によって検出された前記加速度の値に基づいて前記ユーザの前記運動状態のうち歩行状態を算出する、請求項1に記載の運動検出装置。 - 前記検出部は、絶対圧の値を検出し、
前記算出手段は、前記検出部によって検出された前記絶対圧の値に基づいて前記ユーザの前記運動状態のうち昇降状態を判別する、請求項1に記載の運動検出装置。 - 前記制御部は、さらに、
前記記憶部に記憶された前記運動状態に基づいて運動強度を特定する運動強度特定手段(116)と、
前記記憶部に記憶された前記運動状態それぞれの継続時間および前記運動強度特定手段によって特定された前記運動強度を用いて運動量を算出する運動量算出手段(117)とを含む、請求項1に記載の運動検出装置。 - 本体部(191)と、制御部(110)と、記憶部(120)と、検出部(170,180)とを備える運動検出装置(100)の制御方法であって、
前記制御部が、
前記検出部によって検出されたデータから、体動を判別するステップ(111)と、
前記検出部によって検出されたデータから、前記体動ごとの移動状態を判別するステップ(112,113)と、
予め定められたルールに基づいて、前記移動状態の補正を行なうステップ(114,115)と、
判別された結果から、ユーザの運動状態を算出するステップ(114,115)と、
算出された前記運動状態を前記記憶部に記憶させるステップ(115)とを含む、運動検出装置の制御方法。
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JP2005230340A (ja) | 2004-02-20 | 2005-09-02 | Intelligent Cosmos Research Institute | エネルギー消費量推定装置、エネルギー消費量推定システムおよびデータベース |
JP2007093433A (ja) * | 2005-09-29 | 2007-04-12 | Hitachi Ltd | 歩行者の動態検知装置 |
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2010
- 2010-07-16 JP JP2010161901A patent/JP5713595B2/ja active Active
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2011
- 2011-05-06 DE DE112011102379T patent/DE112011102379T5/de active Pending
- 2011-05-06 CN CN201180034999.6A patent/CN103025239B/zh active Active
- 2011-05-06 WO PCT/JP2011/060579 patent/WO2012008207A1/ja active Application Filing
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DE112011102379T5 (de) | 2013-08-22 |
US9330202B2 (en) | 2016-05-03 |
JP2012020057A (ja) | 2012-02-02 |
CN103025239A (zh) | 2013-04-03 |
US20130123959A1 (en) | 2013-05-16 |
WO2012008207A1 (ja) | 2012-01-19 |
JP5713595B2 (ja) | 2015-05-07 |
CN103025239B (zh) | 2015-09-23 |
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