JP2007236917A - Exercise measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exercise measuring instrument being miniaturized, being easily mounted for a long time without feeling of incongruity, and continuously measuring an exercise state and a heart rate with high precision. <P>SOLUTION: The exercise measuring instrument 1 is equipped with a tri-axial acceleration sensor 20 for detecting acceleration having vectors in tri-axial directions, an electrocardiac potential detecting means 11 having a first electrode provided to the undersurface of a main body and to come into contact with the surface of the living body and a second electrode which is provided to the main body and with which a finger can be brought into contact and detecting an electrocardiac potential, an arithmetic means 22 for converting the acceleration in the respective directions detected by the tri-axial acceleration sensor to scalar quantity and not only to operate exercise strength based on the scalar quantity but also to operate a heart rate on the basis of the detected electrocardiac potential, a memory 23 for storing the operation result by the arithmetic means, and the displaying part 4 provided on the surface of the main body and displaying the operation result by the arithmetic means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a motion measuring apparatus capable of simultaneously measuring the amount of exercise and the heart rate while being worn on the wrist regardless of the state of exercise.

  Many devices have been known for monitoring physical condition by detecting exercise status, heart rate, energy consumption, etc. by wearing it on the user's body for use in health management, rehabilitation or research. .

  For example, as one of them, the acceleration of the wrist in the vertical direction and the rotational angular velocity about the left and right axis are detected by the motion sensor, and based on the output and the periodicity thereof, the intensity of the exercise and the type of action (for example, sitting now) 2. Description of the Related Art A wristwatch-type motion measuring device that can identify a behavior type such as being or walking and calculate energy consumption according to the behavior type is known (see, for example, Patent Document 1).

  In addition, as another device, an acceleration sensor, an angular velocity sensor, and a photoelectric pulse wave sensor are provided, and body information combining exercise information and biological information is monitored by data of each sensor. A monitoring device that can be used is provided (see, for example, Patent Document 2).

Furthermore, as another device, a heart rate that is strong against body motion noise is directly measured in the vicinity of the heart (cardiac potential) by a transmitter (configured with electrodes, detection circuit, power supply, transmission circuit, etc.) attached to the chest. And a device capable of displaying the measurement result on a terminal attached to the wrist is known.
JP 2002-263086 A Japanese Patent Laid-Open No. 2003-24287

However, the above-described conventional apparatus still has the following problems.
That is, the devices described in Patent Documents 1 and 2 require a sensor for detecting acceleration and angular velocity, so that there are many types of sensors and the size of the sensor has been large. For this reason, the size of the entire apparatus is easily increased. Therefore, even if it is made into a wristwatch type, the size becomes large, it is difficult to wear it, and it feels uncomfortable. Moreover, the measurement over a long time was not able to be performed in the state worn continuously throughout the day. As a result, it was not possible to seamlessly monitor the energy consumed by the behavior and exercise of the day.
In addition, since the motion state is determined based on the acceleration and the angular velocity, the data processing is likely to be complicated.

  In particular, since the device described in Patent Document 2 measures the pulse rate using a photoelectric volume pulse wave or pressure pulse wave, an accurate pulse rate can be obtained during intense exercise. It was not possible to calculate. That is, during intense exercise, the speed of blood flow increases, so the amount of light transmission changes and body motion noise increases. Since this body motion noise exceeds the pulse signal, the pulse rate could not be calculated with high accuracy as described above. As a result, physical condition could not be monitored during exercise.

  In addition, the device that attaches the transmitter to the chest can measure the heart rate continuously even during intense exercise, but because the device is attached directly to the chest, it can be worn tightly for one day. Have difficulty. In particular, in the case of women, the feeling of pressure or discomfort was noticeable.

In particular, the user's exercise load level varies from user to user due to age differences, physical strength differences, and the like. In other words, even if the same exercise load is given, the heart rate varies depending on the difference in individual cardiopulmonary function and the physical condition of the day, etc. If the exercise load is determined simply by the heart rate, the exercise load will be excessive or insufficient. . Therefore, in order to eliminate such problems, at least exercise intensity and heart rate information are required.
In this regard, the above-mentioned device that merely measures the heart rate can prevent a large load from being applied to the heart or the like, but it cannot directly evaluate the amount of exercise, and eventually the user's feeling I had to rely on it.

  The present invention has been made in view of such circumstances, and its purpose is to be able to be downsized and to wear it easily for a long time without a sense of incongruity, and to continuously and accurately measure the exercise situation. It is possible to provide an exercise measuring apparatus that can perform arbitrary heart rate measurement with high accuracy regardless of the exercise status.

The present invention provides the following means in order to solve the above problems.
The motion measuring device of the present invention includes a main body, a fixing means for mounting the main body on an arm in a state where the lower surface of the main body faces the living body surface side, and three axes for detecting acceleration having vectors in three axis directions. An electrocardiogram that detects an electrocardiogram, comprising: an acceleration sensor; a first electrode that is provided on the lower surface of the main body and contacts the surface of the living body; and a second electrode that is provided on the main body and is capable of contacting a finger. The acceleration in each direction detected by the detection means and the three-axis acceleration sensor is converted into a scalar quantity, the exercise intensity is calculated based on the scalar quantity, and the heart rate is calculated based on the detected cardiac potential. And a storage means for storing a calculation result by the calculation means, and a display unit provided on the surface of the main body for displaying the calculation result by the calculation means.

In the motion measuring apparatus according to the present invention, first, the main body is attached to the arm (wrist) by the fixing means with the lower surface of the main body facing the living body surface, that is, the skin side. At this time, the first electrode provided on the lower surface of the main body is in contact with the skin.
When the arm is moved in this state, the triaxial acceleration sensor detects an acceleration having a vector in each of the triaxial directions (XYZ directions) and sends it to the computing means. The calculation means converts the transmitted acceleration in each direction into a scalar quantity, and calculates the exercise intensity from the converted scalar quantity. The exercise intensity is stored in the storage unit and displayed on the display unit.

  Thereby, the user can confirm the present exercise intensity easily. In particular, since a three-axis acceleration sensor is used, movement in any direction can be detected by a single sensor. Therefore, unlike the conventional method of obtaining exercise intensity using a plurality of sensors, the space occupied by the sensors can be minimized. Therefore, it can be reduced in size and can be worn as a wristwatch type without a sense of incongruity. As a result, even if it is worn for a long time (for example, all day), continuous measurement can be performed without feeling uncomfortable or restrained.

  In addition, since the triaxial acceleration sensor detects acceleration in any direction, it can be mounted regardless of the directionality. For example, it can be mounted so that the main body is positioned outside the wrist, or can be mounted so that the main body is positioned inside the wrist. Therefore, it is excellent in wearability. In addition, since it is worn on an arm having a high degree of freedom of movement, acceleration can be detected with high accuracy. Therefore, it is not necessary to specify how to swing the arm, and the user can spend a daily life in a natural state. Furthermore, since the acceleration detected by the three-axis acceleration sensor is simply converted into a scalar quantity and the exercise intensity is obtained from the scalar quantity, data processing is easy, contributing to cost reduction of hardware and software. be able to.

  Moreover, when measuring a heart rate, a user makes a finger contact the 2nd electrode provided in the main body. As a result, a closed circuit with the heart in between is formed, and the electrocardiogram detection means can detect the electrocardiogram at that time. Then, the calculation means calculates the heart rate from this electrocardiogram. In addition, the heart rate is stored in the storage unit and displayed on the display unit in the same manner as the exercise intensity.

  Thus, since the main body is a wristwatch type, the user can check the heart rate by simply touching the second electrode with the finger when necessary. In particular, since the heart rate is measured based on the electrocardiographic potential of both electrodes, unlike the conventional method of detecting photoelectric pulse waves, the heart rate is not affected by body movement noise and is highly accurate even during exercise. The number can be measured. Therefore, the user can accurately grasp his / her heart rate even during exercise. Further, since the heart rate is measured only when the user touches the second electrode, power consumption can be suppressed as much as possible.

  Moreover, since the exercise intensity described above is displayed together with the heart rate on the display unit, the user can determine whether or not the current exercise amount (exercise load) is appropriate. For example, it is possible to objectively determine that the exercise is the same as that of another person, but because the heart rate is high, the exercise amount is high and the load is high for me. In this way, the physical condition can be monitored while relating exercise intensity and heart rate. In addition, since the calculated exercise intensity and heart rate are stored in the storage means, it is possible to check the past physical condition.

  As described above, according to the motion measurement device of the present invention, it is possible to reduce the size, easily wear it for a long time without a sense of incongruity, and continuously and accurately measure the motion status, and optionally The heart rate can be measured with high accuracy regardless of the exercise status. As a result, the body condition can be accurately monitored.

  Moreover, in the motion measuring device of the present invention, in the motion measuring device of the present invention, the display unit displays data in which the exercise intensity and the heart rate are correlated in a graph for each measurement time. To do.

  In the exercise measuring apparatus according to the present invention, the display unit displays the data correlating the exercise intensity and the heart rate in a graph for each measurement time, so that the user can confirm the transition of the cardiopulmonary function at a glance from the graph. Can do. For example, it can be confirmed that the heart rate gradually decreases or increases even though the exercise intensity is the same.

  Further, the motion measurement device of the present invention is the motion measurement device of the present invention described above, wherein the computing means compares the exercise intensity with a predetermined threshold value to determine the type of exercise and walks or runs. When it is determined that the number of steps is determined, the step count measurement is started from the degree of change in exercise intensity.

In the motion measuring apparatus according to the present invention, the calculation means determines and classifies the type of exercise by comparing the calculated exercise intensity with a threshold value. For example, when the exercise intensity is lower than the threshold, it is determined that the user is in a stationary state such as sitting, and when the exercise intensity is higher than the threshold, it is determined that the user is walking or running.
Then, when the calculation means determines that the user is walking or running, the calculation means starts measuring the number of steps from the degree of change in exercise intensity. This makes it possible to accurately measure the number of steps when actually walking or running.

  The motion measurement device of the present invention is characterized in that, in the motion measurement device of the present invention, the calculation means calculates energy consumption from the type of motion, the measured number of steps, and the measurement time. is there.

  In the motion measuring apparatus according to the present invention, the calculation means calculates the energy consumption from the type of exercise, the number of steps, and the measurement time. In particular, instead of simply calculating the energy consumption from the number of steps, the calculation is performed in consideration of the type of exercise (walking or running) that changes every moment over a long period of time, so the user knows the exact energy consumption. be able to.

  In addition, the motion measuring device of the present invention includes a notifying unit for notifying when the signal is received in the motion measuring device of the present invention, wherein the calculating unit sets the calculated heart rate in advance. It is determined whether the signal is within the range, and a signal is output to the notification unit so as to notify the fact when it is determined that the value is out of the range.

  In the motion measuring apparatus according to the present invention, after the calculating means calculates the heart rate, it is determined whether or not the heart rate is within a preset range. And if a calculating means judges that it is outside a range, in order to notify that, it will output a signal to an alerting | reporting means. Upon receiving this signal, the notification means notifies the user (for example, sounds, vibrates, emits light, etc.) to notify that the heart rate is out of range. As a result, the user can objectively and quickly know the current amount of exercise.

  Further, the motion measurement device of the present invention outputs the signal only when the calculation means in the motion measurement device of the present invention determines that it is walking or running as a result of determining the type of motion. It is characterized by.

  In the motion measuring apparatus according to the present invention, the calculating means outputs a signal to the notifying means only when it is determined that the action type is walking or running even if the heart rate is outside the preset range. Output. That is, notification is made only when actually walking or performing some kind of exercise. In other words, when you actually work while sitting down, if your heart rate has increased for some reason, or if your heart rate has increased during a meal, no signal is output to the notification means. . In this way, notification can be performed while associating with the type of exercise, so it is easy for the user to use.

  The motion measurement device of the present invention is characterized in that in any of the motion measurement devices of the present invention, an input means capable of inputting calculation conditions and determination conditions is provided.

  In the motion measuring apparatus according to the present invention, the user can appropriately input various calculation condition and determination condition parameters (for example, personal data such as age, sex, weight, etc.) using the input means. It is possible to monitor the physical condition more accurately.

  The motion measurement device of the present invention is characterized in that, in the motion measurement device of any of the above-mentioned present inventions, the main body has a watertight structure that prevents liquid from entering the interior.

  In the motion measurement device according to the present invention, since the main body has a watertight structure, measurement can be performed even if the user is in the water. For example, measurement can be performed even during swimming or bathing. Thus, the range of use can be expanded, and the usability is improved.

  According to the motion measuring apparatus of the present invention, it is possible to reduce the size, easily wear it for a long time without a sense of incongruity, and continuously and accurately measure the motion status, and optionally measure the heart rate. Can be performed with high accuracy regardless of the exercise situation. As a result, the body condition can be accurately monitored.

Hereinafter, an embodiment of a motion measuring apparatus according to the present invention will be described with reference to FIGS.
The exercise measuring device 1 of the present embodiment is a wristwatch type device, and measures exercise intensity and heart rate while being worn on a wrist (arm). As shown in FIGS. 1 to 4, the motion measuring apparatus 1 includes a housing (main body) 2 containing various electronic components, and a housing 2 in a state where the lower surface of the housing 2 faces the living body surface side, that is, the skin side. And fixing means 3 for attaching 2 to the wrist.

The housing 2 is made of a metal material such as plastic or aluminum, and has a predetermined thickness, for example, a substantially rectangular shape when viewed from above. At this time, the housing 2 is prevented from entering the liquid by an O-ring or a seal (not shown) as appropriate. That is, it has a watertight structure.
Further, on the surface of the housing 2, a display unit 4 for displaying various types of information including calculation results obtained by the calculation means 22 described later, and a plurality of data for allowing a user to input various data such as calculation conditions and judgment conditions. Are provided with an input means 7 composed of buttons 5 and 6 and a touch electrode (second electrode) 8 for measuring an electrocardiogram that allows the user to touch the finger.

  A light button 9 for turning on / off a light 4a incorporated in the display unit 4 is provided on a side surface of the housing 2, and an electrocardiographic measurement that is always in contact with the skin is provided on the lower surface of the housing 2. A lower electrode (first electrode) 10 is provided. The lower surface electrode 10 and the touch electrode 8 constitute a cardiac potential detection means 11 that detects a cardiac potential.

The fixing means 3 has a first band 15 and a second band 16 which are attached to the wrist with a proximal end attached to the housing 2. The first band 15 and the second band 16 are provided in the longitudinal direction of the housing 2 so as to face each other with the housing 2 interposed therebetween. Moreover, both the bands 15 and 16 are formed with the elastic material which can be expanded-contracted.
A buckle 15a and a tongue 15b are attached to the tip of the first band 15. The second band 16 has a plurality of insertion holes 16 a into which the tongues 15 b are inserted along the longitudinal direction of the second band 16. Thereby, the length of the 1st band 15 and the 2nd band 16 can be adjusted now according to the thickness of a user's wrist. Thereby, while mounting the housing 2, the lower surface electrode 10 can be reliably brought into contact with the skin.

  Further, in the housing 2, as shown in FIG. 4, a triaxial acceleration sensor 20 for detecting an acceleration having a vector in the triaxial direction, and the acceleration in each direction detected by the triaxial acceleration sensor 20 are scalar. And calculating the exercise intensity based on the scalar quantity, calculating the heart rate based on the electrocardiogram detected by the electrocardiogram detecting means 11, and the calculation result by the calculator 22 And a sound output unit (notification unit) 24 such as an alarm for outputting a sound when a signal output from the calculation unit 22 is received.

In addition, in the housing 2, a control circuit 27 including a time measuring means 25 for measuring time and a measurement data storing means 26 is incorporated in addition to the calculating means 22 and the memory 23. Connected to the control circuit 27 are an input means 7 comprising a plurality of buttons 5, 6, a display unit 4, a light 4 a that is turned ON / OFF by a light button 9, and an audio output unit 24.
The acceleration data detected by the three-axis acceleration sensor 20 is input to the control circuit 27 via the amplification means 30 and the A / D conversion means 31, and the heart detected by the cardiac potential detection means 11 is input. The potential data is inputted through the filter means 32, the amplifying means 33, and the A / D conversion means 31.
Note that the amplification factor of the amplification unit 33 is appropriately adjusted by the amplification factor setting unit 34.

  The triaxial acceleration sensor 20 detects acceleration in three dimensions, that is, in the triaxial (X, Y, Z) directions, and is, for example, a piezoresistive triaxial acceleration sensor. In particular, the type that detects using the piezoresistive effect has recently been marketed as a small and thin module in one package, including signal amplification circuits, A / D conversion circuits, and temperature compensation circuits, using micromachining technology. Has been provided to. The detection principle is, for example, that the weight is supported by a thin silicon beam (beam) having a piezoresistive element on the upper surface, and the acceleration is detected based on the resistance change of the piezoresistive element when the weight is moved by acceleration. That's it.

  The motion measuring apparatus 1 of the present embodiment uses only the three-axis acceleration sensor 20 as a motion sensor, and does not use any other sensor such as an angular velocity sensor. The electrocardiogram detection means 11 measures the minute electromotive force generated with the activity of the heart with the touch electrode 8 and the lower electrode 10 at the RR interval (interval where the ventricle contracts). The potential is detected.

In addition, the motion measurement apparatus 1 of the present embodiment performs calculations so that the calculation means 22 can display a graph in a state where the exercise intensity and the heart rate are correlated, and the display unit 4 displays the correlated data for the measurement time. A graph is displayed every time.
Further, the calculation means 22 compares the calculated exercise intensity with a preset threshold value, for example, the type of exercise, for example, sitting and quiet (stationary state), walking (walking state), or running. When determining (running state) or the like and determining that the user is walking or running, the measurement of the number of steps is started based on the change in exercise intensity.
Further, the calculation means 22 calculates energy consumption from the type of exercise, the measured number of steps, and the measurement time.

Further, the calculation means 22 determines whether or not the calculated heart rate is within a preset range, and when determining that the calculated heart rate is out of the range, outputs a sound so as to notify the user of that fact. A signal is output to the unit 24. At this time, the calculation means 22 outputs a signal only when it is determined that the type of exercise is walking or running.
The data processing of these computing means 22 will be described in detail later.

Next, a case where the exercise intensity and heart rate are measured while being worn on the user's wrist by the exercise measuring device 1 configured as described above will be described with reference to the flowcharts shown in FIGS. 5 and 6. .
First, the bands 15 and 16 are wound so as to wind the user's wrist, and the tongue 15b of the first band 15 is inserted into the insertion hole 16a of the second band 16 according to the thickness of the wrist. The housing 2 is attached to the wrist. Thereby, the lower surface electrode 10 can be made to contact skin reliably.

  When the arm is moved in this state, the triaxial acceleration sensor 20 detects the acceleration in each direction (XYZ direction) and sends it to the amplification means 30. The amplifying unit 30 amplifies the acceleration in each direction to a size that can be easily processed, and then outputs the amplified acceleration to the A / D converting unit 31. The A / D conversion means 31 converts the amplified acceleration in each direction into a digital signal, and generates a vector signal in each direction, that is, three-dimensional (X, Y, Z) data (S1). Further, the A / D conversion means 31 sends the generated three-dimensional data to the calculation means 22.

The calculation means 22 converts the transmitted three-dimensional data into a scalar quantity based on a predetermined formula (3D = √ (X ² + Y ² + Z ² ) (S2), and further converts the converted scalar quantity into an LPF ( The motion intensity is calculated by performing a low pass filter (S3) This LPF process is a process for removing only the low frequency components necessary for motion determination by removing the high frequency components from the scalar quantity. In this case, sampling of the 3-axis acceleration sensor 20 is performed every 87 mS, and a filtering process of 0.5 Hz is performed by moving and averaging 11 pieces of data. The coefficient α may be multiplied.

The exercise intensity calculated by the calculation means 22 is stored in the memory 23 (S4) and displayed on the display unit 4.
Thereby, the user can confirm the present exercise intensity easily. In particular, since the three-axis acceleration sensor 20 is used, movements in all directions can be detected by one sensor. Therefore, unlike the conventional method of obtaining exercise intensity using a plurality of sensors, the space occupied by the sensors can be minimized. Therefore, it can be reduced in size and can be worn as a wristwatch type without a sense of incongruity. As a result, continuous measurement can be performed without feeling uncomfortable or restrained even when worn for a long time (for example, all day).

Moreover, since the triaxial acceleration sensor 20 detects the acceleration of all directions, it can be mounted | worn without choosing directionality. For example, it is possible to mount the housing 2 so that the housing 2 is positioned inside the wrist, or to mount the housing 2 so that the housing 2 is positioned outside the wrist. Therefore, it is excellent in wearability. Moreover, since it is mounted on a wrist having a high degree of freedom of movement, acceleration can be detected with high accuracy. Therefore, it is not necessary to specify how to swing the arm, and the user can spend a daily life in a natural state.
In addition, since the acceleration detected by the three-axis acceleration sensor 20 is converted into a scalar quantity to obtain the exercise intensity, data processing is easy, and it can contribute to cost reduction of hardware and software.

On the other hand, when measuring the heart rate, the user brings the fingertip into contact with the touch electrode 8 of the housing 2. As a result, a closed circuit with the heart in between is formed, and the electrocardiogram detection means 11 can detect the electrocardiogram at this time. Then, the cardiac potential detection unit 11 outputs the detected cardiac potential to the filter unit 32. The filter means 32 filters the detected electrocardiogram to remove excess signals, and then outputs them to the amplifying means 33. The amplifying unit 33 amplifies the cardiac potential to a size that can be easily processed, and then outputs it to the A / D converting unit 31. The A / D conversion means 31 converts the amplified cardiac potential into a digital signal, generates cardiac potential data (S5), and then outputs it to the computing means 22.
The computing means 22 measures the sent electrocardiographic data at RR intervals (S6) and converts it into a one-minute heart rate (S7). The converted heart rate is stored in the memory 23 together with the exercise intensity (S4) and displayed on the display unit 4 (S8).

  Thereby, the user can check the heart rate. In particular, since the housing 2 is a wristwatch type, the user can check the heart rate by simply touching the touch electrode 8 with a finger when necessary. In addition, since the heart rate is measured based on the electrocardiogram by the bottom electrode 10 and the touch electrode 8, unlike the conventional method of detecting the photoelectric pulse wave, it is not affected by body motion noise and is in motion. Can measure heart rate with high accuracy. Therefore, the user can accurately grasp his / her heart rate even during exercise. In addition, since the heart rate is measured only when the user touches the touch electrode 8, power consumption can be suppressed as much as possible.

  Moreover, since the exercise intensity mentioned above is displayed on the display part 4 with the heart rate, the user can judge whether the present exercise amount (exercise load) is appropriate. For example, it is possible to objectively determine that the exercise is the same as that of another person, but because the heart rate is high, the exercise amount is high and the load is high for me. As described above, the physical state can be monitored while relating the exercise intensity and the heart rate, and it is possible to easily evaluate whether or not the exercise load is suitable for an individual. In addition, since the calculated exercise intensity and heart rate are stored in the memory 23, it is possible to check the past physical condition.

  Further, the calculation means 22 performs a calculation for displaying the graph with the calculated exercise intensity and heart rate correlated with each other (S9), and sends the calculation result to the display unit 4. In response to this, the display unit 4 displays the data correlating the exercise intensity and the heart rate as a graph for each measurement time (S10). Thereby, the user can confirm the transition of the cardiopulmonary function at a glance from the graph. For example, it can be confirmed that the heart rate gradually decreases or increases even though the exercise intensity is the same.

  Further, the calculation means 22 converts the exercise intensity into zero-cross data as a process for counting the number of steps from the calculated exercise intensity (S11). This is a process of subtracting data obtained by performing LPF processing at 0.5 Hz from scalar quantity data, and sliding the average of the scalar quantity to zero level. Then, after performing this process, the calculation means 22 performs zero-cross counting that counts the number of times the scalar amount change curve crosses the zero line (S12). In other words, when the exercise intensity has periodicity, the frequency of the exercise is obtained.

  Next, the computing means 22 compares the exercise intensity with a preset threshold value to determine and classify the type of exercise (S13). For example, when the luck intensity is lower than a threshold value, it is determined that the user is in a stationary state such as sitting, and when it is higher than the threshold value, it is determined that the user is walking or running. If the calculation means 22 determines that it is walking or running as a result of the determination, it reads the change in exercise intensity from the zero-cross data, starts counting the number of steps (S14), and displays the number of steps on the display unit 4. It is displayed (S15). Thus, the user can accurately know the number of steps when actually walking or running.

The zero-cross data that is the basis of the number of steps is stored in the memory 23 together with the measurement time data (time stamp) (S4). And the calculating means 22 calculates consumption energy from the kind of exercise | movement judged by comparing with a threshold value, the number of steps, and measurement time (S16), and displays the calculated consumption energy on the display part 4 (S17).
In particular, the energy consumption is not simply calculated from the number of steps, but is calculated in consideration of the type of exercise that changes every moment over a long period of time, so that the user can know the exact energy consumption.

  At this time, the user calculates in advance more accurate energy consumption by inputting various calculation conditions and determination condition parameters, for example, personal data such as age, gender, weight, etc., by the input means 7 in advance. Can do.

  Further, the calculation means 22 determines whether or not the calculated heart rate is within a preset range, and when it is determined that the calculated heart rate is out of the range, a notification determination that informs the user of the fact by voice ( S18) is performed. At this time, the calculation means 22 performs notification (S19) only when it is determined that the user is walking or running as a result of determining the type of exercise. This notification determination will be described in detail below.

  First, as shown in FIG. 6, the user inputs the heart rate notification conditions, that is, the upper limit value and the lower limit value of the heart rate in advance by the input means 7, and sets the appropriate range of the heart rate (S20). . Under this condition, the calculation means 22 determines whether or not the calculated heart rate is within an appropriate range (S21). As a result, when it is determined that it is within the range, no notification is performed (S22). On the other hand, if it is determined that the heart rate is out of the range, it is determined whether or not the exercise intensity is equal to or greater than a threshold value (S23).

As a result of the determination, if it is determined that the exercise intensity is equal to or less than the threshold value, the notification is not performed (S22). That is, it is determined that the heart rate has increased for reasons other than exercise, and no notification is given. For example, notification is not performed if the heart rate has increased for some reason while working while sitting, or if the heart rate has increased during a meal.
On the other hand, if it is determined that the exercise intensity is greater than or equal to the threshold value, it is determined that the exercise is actually performed, and a signal is output to the audio output unit 24. The sound output unit 24 receives this signal and sounds an alarm or the like to notify and notify that effect (S19).
As a result, the user can objectively and quickly know whether the current exercise is excessive or insufficient. In particular, since the notification is made in association with the type of exercise, it is easy for the user to use.

As described above, according to the motion measurement device 1 of the present embodiment, it is possible to reduce the size, wear it easily for a long time without a sense of incongruity, and continuously and accurately measure the exercise situation, Arbitrary heart rate measurement can be performed with high accuracy regardless of the exercise situation. As a result, the body condition can be accurately monitored.
In addition, it is possible to accurately know the number of steps and energy consumption. Thereby, for example, the daily calorie consumption can be continuously calculated. Therefore, it is possible to easily measure the amount of exercise as a whole even with a short movement time or intermittent exercise such as commuting to school or shopping.
Moreover, since the housing 2 has a watertight structure, measurement can be performed even when the user is swimming or bathing. Therefore, the range of use can be expanded, and usability and ease are improved.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, the heart rate is measured arbitrarily, but a warning sound may be emitted from the sound output unit at an appropriate interval during exercise, for example, so as to prompt the operation. In this way, power consumption can be reduced.
Moreover, although the audio | voice output part was provided as an alerting | reporting means and alert | reported to the user with the audio | voice, it is not restricted to an audio | voice. For example, the notification means may be configured to notify the user by vibrating the housing, or to notify the user by emitting light.

  Further, it may be programmed to hold heart rate data during exercise for a long period of time and automatically learn the relationship between the heart rate and the exercise load for each user. In this way, a more accurate result can be displayed.

(Example)
Next, the above embodiment will be described more specifically based on data obtained through actual experiments.
FIG. 7 is a graph showing the results of measuring the exercise intensity (momentum) and the pulse rate (heart rate) with the passage of time in the three exercise states of the stationary state, the walking state, and the running state. is there. As shown in FIG. 7, it is possible to accurately confirm that the exercise intensity and the pulse rate increase as the state transitions from a stationary state to a walking state and from a walking state to a running state where the body is loaded. It was. Further, it was confirmed that the pulse rate increased with time in each of the walking state and the running state excluding the stationary state.
Since the graph shown in FIG. 7 is displayed on the display unit 4, the user can check the transition of the cardiopulmonary function at a glance, and can accurately monitor the physical condition.

Here, FIG. 8 is a graph showing the result of the calculation means 22 calculating the exercise intensity and the zero-cross signal when actually shifting from the stationary state to the walking state with the passage of time. In FIG. 8, the upper graph shows exercise intensity, and the lower graph shows a zero cross signal. In addition, the threshold value of the calculation means 22 is set in advance so that an exercise intensity of less than 10 is determined to be a stationary state and an exercise intensity of 10 or more is determined to be a walking state.
As a result of walking after actually standing still for 3 seconds from the start of measurement, it was confirmed that the fact was able to be accurately measured as data as shown in FIG. That is, it was confirmed that the exercise intensity was less than the threshold value of 10 until 3 seconds, and after 3 seconds passed, the exercise intensity was changed to exceed the threshold value.

  Further, the zero cross signal shown in FIG. 8 is obtained by data conversion from the exercise intensity by the calculation means 22. Based on this zero cross signal, the number of steps when actually walking can be measured. That is, according to the exercise intensity shown in FIG. 8, the walking state lasts for 3 to 35 seconds. During this time, the zero cross point at which the zero cross signal crosses “0” is 118 points. Therefore, it can be easily confirmed that the number of steps = 118/2 = 59 steps from the conversion formula of the number of steps (step number = cross point / 2). That is, it was confirmed that the user walked with 59 steps for 32 seconds.

  Next, in the walking state shown in FIG. 7, the results of heart rate measurement at the time when about 310 seconds have elapsed from the start of walking are shown in FIGS. 9 is a diagram showing an electrocardiogram waveform between the wrist and the finger during walking, and FIG. 10 is a diagram showing an electrocardiogram waveform after the BPF process on the electrocardiogram waveform shown in FIG. In addition, the user measured the electrocardiographic waveform by bringing the fingertip into contact with the touch electrode 8 for 10 seconds. However, the time is not limited to 10 seconds. If the time required for heart rate measurement, that is, the time during which the fingertip contacts the touch electrode 8 is determined in advance, this time may be set freely.

As shown in FIG. 9, in this electrocardiographic waveform, signal fluctuations are superimposed due to the influence of motion. Therefore, in order to accurately measure the _R n -R ₁ interval required for measurement of heart rate, unnecessary noise BPF (band pass filter): When suppressed by 10 Hz-15 Hz is cardiac potential waveform shown in FIG. 10 is obtained .
As shown in this FIG. 10, since the signal peak of R _n -R ₁ are aligned is obtained, it is possible to perform counting without changing the threshold. Here, the threshold value for counting was half of the maximum peak value (Rmax) of the R wave of the cardiac potential. Counting measures the time of the rising edge of the edge and converts it to a heart rate per minute. This conversion formula is shown below.

HR is a heart rate for 1 minute. Further, Δt is an R _n -R ₁ interval (during measurement time). N is the number of Rs.
Here, when the heart rate is calculated from the electrocardiographic waveform shown in FIG. 10 based on the above formula, HR = 60 / (9.52−0.26) × (16−1) = 97.1 (beats / min) And rounded to 97 (beats / minute). Thus, it was confirmed that the heart rate was accurately measured even during exercise.

1 is an overall external view showing an embodiment of a motion measuring apparatus according to the present invention. It is the external view which looked at the housing periphery of the motion measuring device shown in FIG. 1 from diagonally upward. It is the external view which looked at the housing periphery of the motion measuring device shown in FIG. 1 from diagonally downward. It is a block diagram which shows schematic structure in the housing shown in FIG. It is a flowchart which shows the processing content mainly having the calculating means shown in FIG. It is a flowchart which shows the content of the notification determination in the flowchart shown in FIG. It is a figure for demonstrating the Example which actually experimented, Comprising: It is the graph which measured exercise intensity and the heart rate with progress of time. It is a figure for demonstrating the Example which actually experimented, Comprising: It is the graph which measured the exercise intensity and zero cross signal at the time of shifting to a walking state from a stationary state with progress of time. It is a figure for demonstrating the Example which actually experimented, Comprising: It is a graph which shows the electrocardiogram waveform between a wrist and a finger | toe during a walk. It is a figure for demonstrating the Example which actually experimented, Comprising: It is a graph which shows the cardiac potential waveform after carrying out the BPF process of the cardiac potential waveform shown in FIG.

Explanation of symbols

1 motion measuring device 2 housing (main body)
3 Fixing means 7 Input means 8 Touch electrode (second electrode)
10 Bottom electrode (first electrode)
DESCRIPTION OF SYMBOLS 11 Electrocardiogram detection means 20 3-axis acceleration sensor 22 Calculation means 23 Memory (recording means)
24 Audio output unit (notification means)

Claims (8)

The body,
A fixing means for attaching the main body to the arm in a state where the lower surface of the main body faces the surface of the living body;
A triaxial acceleration sensor that detects acceleration with vectors in three axial directions;
A cardiac potential detection means for detecting a cardiac potential, comprising: a first electrode that is provided on a lower surface of the main body and contacts the surface of the living body; and a second electrode that is provided on the main body and is capable of contacting a finger;
Calculating means for converting acceleration in each direction detected by the three-axis acceleration sensor into a scalar quantity, calculating exercise intensity based on the scalar quantity, and calculating a heart rate based on the detected cardiac potential; ,
Storage means for storing a calculation result by the calculation means;
A motion measurement apparatus comprising: a display unit provided on the surface of the main body and displaying a calculation result by the calculation unit. The motion measurement apparatus according to claim 1,
The said display part displays the data which correlated the said exercise intensity and the said heart rate as a graph for every measurement time, The exercise | movement measurement apparatus characterized by the above-mentioned. In the movement measuring device according to claim 1 or 2,
The calculation means compares the exercise intensity with a predetermined threshold value to determine the type of exercise, and when determining that the user is walking or running, starts calculating the number of steps from the change in exercise intensity. A motion measuring device characterized by that. The motion measurement device according to claim 3,
The said calculating means calculates an energy consumption from the kind of said exercise | movement, the measured number of steps, and measurement time, The exercise | movement measuring device characterized by the above-mentioned. In the movement measuring device according to claim 3 or 4,
When a signal is received, a notification means for notifying that is provided,
The calculation means determines whether or not the calculated heart rate is within a preset range, and outputs a signal to the notification means so as to notify the fact when it is determined that it is out of the range. A motion measuring device characterized by that. The motion measurement device according to claim 5,
The said calculating means outputs the said signal only when it is judged that it is walking or running as a result of judging the kind of said exercise | movement, The exercise | movement measuring device characterized by the above-mentioned. In the movement measuring device according to any one of claims 1 to 6,
An exercise measuring apparatus comprising an input means capable of inputting calculation conditions and judgment conditions. In the movement measuring device according to any one of claims 1 to 7,
The motion measuring apparatus according to claim 1, wherein the main body has a watertight structure for preventing liquid from entering the inside.

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