JP5571904B2 - Energy consumption notification device - Google Patents

Description

  The present invention relates to an energy consumption notification device that, like a pedometer, is worn on the body and notifies the energy consumption during underwater exercise.

  As a conventional energy consumption notification device during underwater exercise, a pressure sensor is attached to the body, the water pressure caused by body movement during underwater exercise is measured, and this water pressure is integrated over time and converted into energy consumption for display. Is known (for example, see Patent Document 1).

  It is also known to measure the body's vertical, longitudinal, and lateral acceleration with an accelerometer and to estimate the amount of physical activity during walking underwater by integrating the absolute value (magnitude) of the acceleration over time ( For example, refer nonpatent literature 1.).

JP 2003-339682 A

Jun Shimizu et al., “Estimation of exercise intensity during underwater walking using an accelerometer and its evaluation” Proceedings of the 17th Annual Meeting of the Biomechanics Society of Japan, September 13, 2002, 216E

  However, none of the conventional energy consumption notification devices can accurately report the energy consumption, and there is a problem in reliability.

  In view of the above problems, an object of the present invention is to provide an energy consumption notification device that is excellent in reliability despite a simple configuration.

  The energy consumption notification device of the present invention calculates (A) the first receiving means for receiving information on the position where the child device is present from the child device by radio waves, and calculates the speed of the child device from the history of the child device position, Furthermore, an energy consumption calculation means for calculating the user's energy consumption from the slave device speed, and a first transmission means for transmitting the energy consumption from a plurality of known positions around the pool to the slave device by radio waves. And (B) second receiving means for receiving the energy consumption as radio signals from a plurality of known positions of the parent machine, notification means for notifying the user of the energy consumption, and reception by the receiving means Position measuring means for calculating and measuring the position of the slave unit in the pool from the intensity of each of the plurality of radio waves, and second transmission means for transmitting information related to the slave unit position to the master unit by radio wave Characterized in that it comprises a handset that is worn by the user has.

  In addition, the energy consumption notification device of the present invention includes (A) first receiving means for receiving, from a slave unit, information relating to the location of the slave unit and information relating to the acceleration of the slave unit by radio waves, and history of the slave unit position. Energy consumption calculating means for calculating the speed of the slave unit from the slave unit and further calculating the user's energy consumption from the slave unit speed and the slave unit acceleration, and the energy consumption from the plurality of known positions around the pool A base unit having a first transmission means for transmitting to the base station by radio waves, (B) second receiving means for receiving the energy consumption as radio signals from a plurality of known positions of the base unit, and using the energy consumption Notification means for informing the user, position measurement means for calculating and measuring the position of the slave unit in the pool from the intensity of each of the plurality of radio waves received by the reception unit, and measuring the acceleration of the slave unit. And a slave unit that is attached to a user and includes a second transmission unit that transmits information on the slave unit position and information on the slave unit acceleration to the master unit by radio waves. .

  Further, the master unit can further notify an accident such as a user having fallen by further having an alarm means for detecting and alarming that the radio wave from the slave unit has been interrupted.

  According to the present invention, in order to measure the position of the slave unit from the intensity of a radio wave that transmits energy consumption and the like, it is possible to provide an energy consumption notification device that is excellent in reliability despite a simple configuration. it can.

It is a figure explaining the structure of the energy consumption alerting | reporting apparatus by Example 1 of this invention. It is a figure explaining the structure of the energy consumption alerting | reporting apparatus by Example 2 of this invention. It is a scatter diagram which shows the relationship between the estimated value by an estimation formula, and the actual value which measured oxygen consumption. It is a figure which shows the relationship between the estimated value by an estimation formula, and the measured value of oxygen consumption in each male trial. It is a figure which shows the relationship between the estimated value by an estimation formula, and the measured value of oxygen consumption in each female trial. It is a figure explaining the operation | movement of a present Example.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram illustrating a configuration of an energy consumption notification device according to a first embodiment of the present invention. The energy consumption notification device according to the present embodiment includes a parent device 100 and a child device 200. The base unit 100 includes a transceiver 11, an antenna 12, a calculator 13, an exercise history DB 14, a display 15, and an alarm 16. The subunit | mobile_unit 200 consists of the antenna 17, the transmitter / receiver 18, the position measuring device 19, the acceleration sensor 20, and the alerting | reporting device 21. FIG. The transmitter / receiver 11 of the parent device 100 and the transmitter / receiver 18 of the child device 200 communicate with each other by radio waves via the antenna 12 and the antenna 17 connected to each other. The transmitter / receiver 11 of the master unit 100 receives different radio waves for each antenna 12 from the slave unit 200 attached to the user in the pool via a plurality of antennas 12 arranged at appropriate known positions around the pool. Is used to transmit the energy consumption of the user, which will be described later, to the slave unit 200. The radio waves can be made different by changing the frequency or performing various modulations. The transmitter / receiver 18 of the child device 200 receives energy consumption from the parent device 100 by radio waves, and the position measuring device 19 calculates the distances to the respective antennas 12 from the intensity of the radio waves and calculates the distance in the pool of the child device 200. The position on the two-dimensional plane is calculated and measured. The principle is that the triangle is determined by the length of the three sides of the triangle. The acceleration sensor 20 includes three acceleration sensors in the xyz triaxial directions, and obtains the absolute value (magnitude) of the user's motion acceleration from the accelerations in the triaxial directions. The transceiver 18 transmits the position of the slave unit 200 measured by the position measuring unit 19 and the absolute value of the acceleration of the movement of the user obtained by the acceleration sensor 20 to the transceiver 11 of the base unit 100. The calculator 13 of the parent device 100 records the position of the child device 200 and the absolute value of the acceleration of the movement of the user received by the transmitter / receiver 11 in the movement history DB 14, and from the history of the position of the child device 200, The speed is calculated, and the user's energy consumption is calculated from the absolute value of the acceleration of the user's movement. The principle is based on simulation. That is, several subjects wear the handset 200 of this embodiment, walk underwater, measure and record the speed and acceleration, measure the subject's oxygen consumption at that time, Take correlation. At that time, energy consumption of the subjects was (1) .sex, (2) .age, (3) .height, (4) .weight, (5) .pool depth, (6) .pool floor surface Considering that it is a function with slip as a variable, it can be simulated more accurately.

Specifically, the multiple regression coefficients α1, α2, α3, and α4 of the following multiple regression equation (1) are obtained by the method of least squares.
Y = α1X1 + α2X2 + α3X3 + α4 (1)
However,
Y: Total oxygen consumption X1: Resting oxygen consumption (depending on the person, but no change over time)
X2: Head acceleration (estimated oxygen consumption due to body movement independent of movement)
X3: Speed ** 3 (because the oxygen consumption by moving in water is proportional to the cube of the moving speed)
α1, α2, α3, α4: Multiple regression coefficients

  The subject's (1) .sex, (2) .age, (3) .height, (4) .weight is reflected in X1. For example, since the Ministry of Health, Labor and Welfare has published the Japanese basic sex and age-based basal metabolic rate and sex, age-specific standard height and standard weight, the resting oxygen consumption X1 can be estimated with reference to this. .

  As values corresponding to oxygen consumption used to move one's body independently of movement, the absolute values of the vertical axis acceleration and the longitudinal axis acceleration of the child device 200 attached to the head are squared and added together, Accumulate for 5 seconds and let the average value be X2.

About oxygen consumption for moving oneself, first, from the characteristic of resistance specific to water, drag D is
D = (1/2) * Cd * S * ro * v ** 2
However,
Cd: Drag coefficient S: Front projected area of human ro: Water density = 1.0
v: Calculated as the moving speed of a person. The front projection area S is calculated based on the knowledge of Japanese body surface area calculation, half of this total area is considered to be the front, and only the proportion of height and depth is submerged in the water. Asking. Since Cd cannot be known, the coefficient including this is obtained. Furthermore, the power (energy per unit time) is obtained by multiplying the drag D by the speed v. That is, a value corresponding to (1/2) * S * ro * v ** 3 is X3. The coefficient α3 combined with Cd is obtained by the method of least squares.

  FIG. 3 is a scatter diagram showing the relationship between the estimated value based on the estimation formula and the actually measured value obtained by actually measuring the oxygen consumption. Fig. 3 (a) shows 29 men (27 to 73 years old) and Fig. 3 (b) shows 21 women (33 to 71 years old) indoor pool (17.2m x 1.8m, depth 1. The actual measurement value and the estimated value when walking underwater at a speed from 25 m / min to 40 m / min at 1 m and a water temperature of 30 degrees) are shown. The estimation accuracy in the obtained estimation equation is the partial correlation coefficient r = 0.89 (male) and r = 0.88 (female), and estimation with high accuracy is possible.

  4 and 5 are diagrams showing the relationship between the estimated value based on the estimation formula and the actually measured value of oxygen consumption in each trial technique. FIG. 4 shows 40 trials in the case of men, and FIG. 5 shows 40 trials in the case of women. From these, it can be seen that the oxygen consumption can be estimated with high accuracy by the acceleration integral value and the speed. That is, it is supported by the present invention that a reliable energy consumption is required.

  Returning to FIG. 1, the exercise history DB 14 records the energy consumption amount of the user when walking underwater in the past, and the display 15 displays the past energy consumption amount as needed. The alarm device 16 determines that the handset 200 is submerged when the handset 200 exists in the pool and the reception of the radio wave by the antenna 12 is suddenly stopped, that is, the user has fallen in the pool, Sound an alarm by sound or light. Furthermore, the transceiver 11 transmits the energy consumption at that time to the subunit | mobile_unit 200 during a walk. The subunit | mobile_unit 200 notifies a user of the energy consumption received from the main | base station 100 with the transmitter / receiver 18 by the alerting | reporting device 21. FIG. This is suitable if the bone conduction is informed by voice because only a specific user can be notified during walking. Thereby, the user can know the energy consumption at that time while wearing the subunit | mobile_unit 200 and walking underwater. Particularly in the present embodiment, since the slave unit 200 detects the intensity of the radio wave that transmits the energy consumption amount from the master unit 100 to the slave unit 200 and measures the position of the slave unit 200, an accurate energy consumption amount can be obtained with a simple configuration. Can be notified to the user.

  The handset 200 can take the form of goggles. A commercially available product such as a ZigBee (registered trademark) terminal can be used for communication.

  FIG. 6 is a diagram for explaining the operation of this embodiment. The measurement is started (step S1). First, a point that has entered the pool in the movement locus is searched for (x0, y0) (step S2), and the time when the user was at the point (x0, y0) is determined. The exercise start time is set (step S3). Then, the trajectory data up to the current position is acquired (step S4), the speed vector is calculated considering only the pool longitudinal direction (step S5), and the speed vector is converted into the speed (absolute value) (step S6). The speed (m / min) is set as one of the movement state variables of the person (step S7). In addition, an acceleration in a certain time width τ (sec) is acquired (step S8), and after filtering to remove an extreme value, this acceleration is full-wave rectified to an absolute value (step S9), and T (sec) ( The waveform within T> τ) is integrated to obtain an integrated value of acceleration (step S10). Then, these speed and acceleration integral values are set as movement time variables (step S11), and the movement time variables and personal variables ((1). Gender, (2). Age, (3). Height, (4). Weight etc. is applied to the estimation formula to calculate the energy consumption (step S12).

  FIG. 2 is a diagram illustrating the configuration of the energy consumption notification device according to the second embodiment of the present invention. The energy consumption notification device according to the present embodiment includes a parent device 100 and a child device 200. The base unit 100 includes a transceiver 11, an antenna 12, a calculator 13, an exercise history DB 14, a display 15, and an alarm 16. The subunit | mobile_unit 200 consists of the antenna 17, the transmitter / receiver 18, the acceleration sensor 20, and the alerting | reporting device 21. FIG. In this embodiment, the position of the slave unit 200 is not measured, but the transmitter / receiver 11 of the master unit 100 receives the acceleration of the slave unit 200 from the slave unit 200 by radio waves, and the calculator 13 determines the intensity of the radio waves. The point which calculates and measures the position of the subunit | mobile_unit 200 differs from Example 1. FIG.

  In addition, this invention is not limited to the said Example. Even if the acceleration is not necessarily taken into account, the energy consumption can be obtained sufficiently accurately only by the speed. In this case, the acceleration sensor 20 is not necessary. The alarm 16 is not always necessary.

11 Transmitter / Receiver 12 Antenna 13 Calculator 14 Exercise History DB
DESCRIPTION OF SYMBOLS 15 Display device 16 Alarm device 17 Antenna 18 Transmitter / receiver 19 Position measuring device 20 Acceleration sensor 21 Alarm device 100 Master device 200 Child device

Claims (3)

(A)
First receiving means for receiving information about a position where the slave is present from the slave by radio waves;
Energy consumption calculating means for calculating the speed of the slave unit from the history of the slave unit position, and further calculating the energy consumption of the user from the slave unit speed;
A master unit having first transmission means for transmitting the energy consumption amount from a plurality of known positions around the pool to the slave unit by radio waves;
(B)
Second receiving means for receiving the energy consumption as radio signals from a plurality of known positions of the master unit;
An informing means for informing the user of the energy consumption;
Position measuring means for calculating and measuring the position of the child device in the pool from the intensity of each of the plurality of radio waves received by the receiving means;
An energy consumption notification device, comprising: a slave unit that has second transmission means for transmitting information related to the location of the slave unit to the master unit by radio waves, and is attached to a user. (A)
First receiving means for receiving, from a slave unit, information relating to a position where the slave unit is present and information relating to acceleration of the slave unit by radio waves;
Energy consumption calculating means for calculating the speed of the slave unit from the history of the slave unit position and further calculating the energy consumption of the user from the slave unit speed and the slave unit acceleration;
A master unit having first transmission means for transmitting the energy consumption amount from a plurality of known positions around the pool to the slave unit by radio waves;
(B)
Second receiving means for receiving the energy consumption as radio signals from a plurality of known positions of the master unit;
An informing means for informing the user of the energy consumption;
Position measuring means for calculating and measuring the position of the child device in the pool from the intensity of each of the plurality of radio waves received by the receiving means;
An acceleration sensor for measuring the acceleration of the slave unit;
An energy consumption notification device comprising: a slave unit that has second transmission means for transmitting information on the slave unit position and information on the slave unit acceleration to the master unit by radio waves, and is mounted on a user. . The energy consumption notification device according to claim 1 or 2 , wherein the parent device further includes warning means for detecting and alarming that the radio wave from the child device has been interrupted.

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