JP3978700B2 - Calorie consumption calculation device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a consumed calorie calculation device configured to accurately calculate calories consumed by a person being exercised.
[0002]
[Prior art]
A so-called calorimeter is known as a portable consumption calorie calculation device that measures and displays the calorie consumed by the person being measured. This type of device is composed of, for example, a step counting device using a mechanical contact or an acceleration sensor, and has a compact configuration that is portable so that it can be attached to the waist of the measurement subject. The step counting device is driven by a built-in battery, detects the impact between the footpad of the person being measured and the ground when walking with a mechanical contact or acceleration sensor, and converts the signal into a digital signal. Convert and measure the number of steps.
[0003]
In the calorie consumption calculation device that performs the step count measurement as described above, the coefficient value of the calorie consumption corresponding to the biological condition such as the body weight, height, age, and sex of the person to be measured is set to the number of steps measured by the step count measurement device. By multiplying, the consumption of calories with respect to the amount of exercise of the subject is predicted.
[0004]
[Problems to be solved by the invention]
However, in the conventional calorie consumption calculation device, when comparing the calorie consumption when the person to be measured walks on a normal flat ground and the calorie consumption at the time of climbing the stairs, the calorie consumption differs greatly depending on the way of exercise. For example, when going down the stairs, it is said to be about 0.8 times that when walking on flat ground (80 m / min), and when going up the stairs, about 3 times more calories are consumed. However, in the conventional device, calorie consumption is calculated only from the number of steps, and calorie consumption is calculated with the same coefficient value as walking on flat ground even when going up and down stairs or walking on hills. There is a problem that it is very different from consumption.
[0005]
In addition, if the calorie consumption calculated is significantly different from the calorie consumed in the actual exercise, the exercise performed for health management becomes a load on the person being measured, and the actual exercise amount relative to the target exercise amount May become excessive.
Here, in order to increase the accuracy of calorie consumption to be calculated, it is necessary to determine the walking state and change the coefficient of calorie consumption according to the walking state, but the mechanical contact point of the calorie consumption device mounted on the waist In addition, it is difficult to determine whether the stairs are going up and down or walking on a hill using only the signals from the acceleration sensor, and it is necessary to perform advanced calculations in order to increase the determination rate. Along with this, the power consumption of the calorie calculation circuit also increases, making it difficult to secure the operation time as a portable device. When the battery capacity is increased, the external shape and weight will not play a role as a portable device. is there.
[0006]
Accordingly, an object of the present invention is to provide a calorie consumption calculation device that solves the above-described problems.
[0007]
[Means for Solving the Problems]
The present invention has the following features to solve the above problems.
The present invention includes a step sensor for detecting the number of steps of the person being measured,
A calorie consumption calculating unit for calculating calorie consumption from the biological condition of the measurement subject and the number of steps detected by the step sensor;
Storage means for storing a calculation result calculated by the consumption calorie calculation unit;
In a calorie consumption calculation device having
An atmospheric pressure sensor for detecting a change in atmospheric pressure according to the up and down movement;
A first low-pass filter and the cutoff frequency is 10 Hz to reduce noise contained in the detection signal output from the pressure sensor,
A differentiating circuit for differentiating the signal output from the first low-pass filter to generate a time differential signal of atmospheric pressure, and extracting a signal waveform corresponding to the ascending / descending operation of the measured person;
A second low-pass filter with 0.3 Hz cut-off frequency to remove the differential noise contained in the time derivative signal,
Determining means for determining an up / down motion based on an atmospheric pressure signal output from the second low-pass filter, and further determining an exercise state of the person to be measured based on a signal from the step sensor and the atmospheric pressure signal;
It is characterized by comprising.
[0008]
Therefore, according to the present invention, the first low-pass filter having a cut-off frequency of 10 Hz for reducing noise included in the detection signal output from the atmospheric pressure sensor, and the cut for removing differential noise included in the time differential signal. Since the second low-pass filter having an off frequency of 0.3 Hz is provided, it becomes possible to more accurately detect a change in atmospheric pressure when the subject moves up and down the stairs, and from the second low-pass filter. In order to determine the ascending / descending operation based on the output atmospheric pressure signal, and further to determine the movement state of the person to be measured based on the signal from the step sensor and the atmospheric pressure signal, for example, elevating operation such as ascending / descending stairs or climbing up / down hill Even when performing, the calorie consumption according to the actual exercise state can be accurately obtained. In addition, it is possible to extend the battery life by reducing the power consumption associated with the calculation, and the measurement time can be extended.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram for explaining an embodiment of a calorie consumption calculating apparatus according to the present invention. FIG. 2 is a diagram showing a wearing state of the calorie consumption calculation device.
As shown in FIG. 1, the calorie consumption calculation device 11 includes an acceleration sensor 12, an atmospheric pressure sensor 13, a sensor interface circuit 14, a calculation circuit 15, a setting switch 16, a display unit 17, a memory 18, A power supply 19, a decoder circuit 20, an external terminal 21, and an external memory 22 are included.
[0010]
The calorie consumption calculation device 11 has a configuration in which each of the above devices is housed in a compact case 23 and is portable. Therefore, as shown in FIG. 2, the calorie consumption calculation device 11 is used in a state of being fixed to the measurement subject's waist by a belt or the like. At this time, the calorie consumption calculation device 11 is in close contact with the measurement subject, and is mounted so as to be able to detect an impact due to walking, a vertical movement due to up and down stairs, etc. following the movement of the measurement subject.
[0011]
The acceleration sensor 12 is a step number sensor that outputs a detection value for determining whether the subject is walking or running due to an impact between the foot of the measurement subject and the ground. The atmospheric pressure sensor 13 is a sensor for detecting a change in atmospheric pressure according to the up-and-down movement and determining the raising / lowering operation of the measurement subject.
Detection signals detected by the acceleration sensor 12 and the atmospheric pressure sensor 13 are amplified by the sensor interface circuit 14 and subjected to waveform shaping. The arithmetic circuit 15 determines the walking state based on detection signals from the acceleration sensor 12 and the atmospheric pressure sensor 13 input via the sensor interface circuit 14.
[0012]
The setting switch 16 is operated when performing various settings. The display unit 17 includes a liquid crystal display (LCD) and displays various data such as calorie consumption according to the measured exercise state and exercise amount.
The memory 18 is storage means for storing various data such as calorie consumption and various input values calculated according to the amount of exercise. Various data are read and written via the decoder circuit 20.
[0013]
The external terminal 21 is an output terminal for performing communication with an external device. The external memory 22 is a removable storage medium for sharing data with a personal computer or the like.
Next, the measurement of calorie consumption and the calculation operation of the calorie consumption calculation device 11 configured as described above will be described.
[0014]
First, the person to be measured fixes the calorie consumption calculation device 11 to a waist position using a fixing tool such as a belt. At this time, the calorie consumption calculation device 11 is further advanced in the vertical direction and the front-rear direction when the measurement subject is in the upright state so that the detection direction (sensitivity direction) of the acceleration sensor 12 can detect the movement of the measurement subject. It is fixed so that the right and left direction perpendicular to the direction can be detected.
[0015]
The measured person operates the setting switch 16 in accordance with the guidance displayed on the display unit 17 of the consumption calorie calculation device 11 to set biological conditions such as various parameters (weight, height, age, sex) necessary for the consumption calorie calculation. input. Various setting values input by the setting switch 16 are stored in the memory 18 via the arithmetic circuit 15.
[0016]
When the person to be measured starts exercising with the calorie consumption calculation device 11 mounted in this way, an acceleration signal in each sensitivity direction corresponding to the action of the person to be measured is input from the acceleration sensor 12 to the sensor interface circuit 14. At the same time, a detection signal (absolute pressure signal) corresponding to a change in atmospheric pressure is input from the atmospheric pressure sensor 13 to the sensor interface circuit 14. Each sensor signal input in this way is input to the arithmetic circuit 15 as a signal having a high S / N by the amplification / shaping circuit in the sensor interface circuit 14.
[0017]
The arithmetic circuit 15 extracts features of each signal after A / D converting the input signal, and predicts whether the subject is in a walking state or a running state. At that time, the atmospheric pressure information obtained from the atmospheric pressure sensor 13 is differentiated and amplified, so as to move up and down the stairs or go up and down the hill without exceeding the input range of the A / D converter for a wide range of height differences. It is possible to determine the moving state in the up-down direction due to the lifting / lowering operation.
[0018]
Further, after predicting the altitude at which the person to be measured stands by the atmospheric pressure detection signal (absolute pressure signal) from the atmospheric pressure sensor 13 and predicting the walking state of the person to be measured from the change in atmospheric pressure during walking, the setting switch The calorie consumption is calculated from the coefficient value and the number of steps determined based on each set value input in 16. Accordingly, the calorie consumption calculation device 11 can calculate the calorie consumption according to the actual motion state based on the detection signals from the acceleration sensor 12 and the atmospheric pressure sensor 13, so that only the signal of the acceleration sensor as in the conventional case can be calculated. Thus, it is not necessary to perform advanced calculations as in the case of determining whether the stairs are going up and down or walking on a hill, and the power consumption of the arithmetic circuit can be reduced, so that the battery life can be ensured without increasing the battery capacity.
[0019]
The calorie consumption calculated in this way is displayed on the display unit 17 by operating the setting switch 16. The measured sensor signals and calorie consumption are stored in the memory 18 and the external memory 22 via the arithmetic circuit 15 and can be read from the memory 18 and the external memory 22.
Here, a method for estimating the movement state of the person to be measured from the detection signals from the acceleration sensor 12 and the atmospheric pressure sensor 13 will be described.
[0020]
The transfer function V ₀₁ of the atmospheric pressure sensor 13 can be expressed as the following equation (1).
V ₀₁ = V _S (0.009P−0.095) ± (pressure error × 0.009 V _S C _T ) (1)
In the above equation (1), the rated voltage V _S = 5.0 [V], and P is the input pressure [KPa]. C _T is a temperature error multiplier. The temperature error multiplier C _T is 0 ° C. to 85 ° C. and C _T = 1.
[0021]
In general, assuming that the atmospheric pressure change per [m] is about 1.067 × 10 ⁻² [KPa], the sensor output changes about 630 [μV] per 1 [m] from the equation (1). . This value can also be obtained by experimentally moving the atmospheric pressure sensor 13 up and down by 1 [m]. For this reason, it is necessary to amplify the detection signal output from the atmospheric pressure sensor 13.
[0022]
Further, in order to directly measure absolute pressure information by the atmospheric pressure sensor 13, it is necessary to pay attention not to change the offset depending on the magnitude of the atmospheric pressure at the place where the measurement is performed or to exceed the dynamic range of the atmospheric pressure sensor 13. is there. However, the information required for the calorie consumption calculation device 11 is not atmospheric pressure itself but information on whether or not the measurement subject is moving in the vertical direction. Therefore, in this embodiment, the problem of offset and dynamic range is solved by measuring only the time differential signal of atmospheric pressure.
[0023]
FIG. 3 is a block diagram showing a waveform processing circuit of a detection signal output from the atmospheric pressure sensor 13.
As shown in FIG. 3, the detection signal V ₀₁ output from the atmospheric pressure sensor 13 is reduced in sensor noise by the first low-pass filter 25 and amplified by the first amplifier 26. Further, the signal amplified by the amplifier 26 is differentiated by the differentiating circuit 27, the differential noise is reduced by the second low-pass filter 28, and amplified by the second amplifier 29 to the detection signal V ₀₂ .
[0024]
The first low-pass filter 25 is for suppressing noise at the output stage of the atmospheric pressure sensor 13, and has a cutoff frequency of 10 [Hz]. The second low-pass filter 28 reduces noise generated in the differentiation circuit 27, and has a cutoff frequency of 0.3 [Hz].
The transfer function G (S) of the atmospheric pressure signal processing system is expressed by the following equation (2).
V ₀₂ / V ₀₁ = -τA ₁ A ₂ C ₀ S / (S ⁴ + C ₃ S ³ + C ₂ S ² + C ₁ S + C ₀ )… (2)
C ₀ = (ω ₁ ω ₂ ) ²
C ₁ = (ω ₁ ω ₂ ² + ω ₁ ² ω ₂ ) / Q
C ₂ = ω ₁ ² + ω ₃ ² + (ω ₁ ω ₂ / Q ² )
C ₃ = (ω ₁ + ω ₂ ) / Q
It is.
[0025]
Here, the amplification factor A ₁ of the first amplifier 26 is A ₁ = 10. The amplification factor A ₂ of the second amplifier 29 is A ₂ = 10. The time constant τ of the differentiating circuit 27 is τ = 10. The cut-off angular frequency ω ₁ of the first low-pass filter 25 is ω ₁ = 2π · 10. The cutoff angular frequency ω ₂ of the second low-pass filter 28 is ω ₂ = 2π · 0.3. The parameter Q of the filter characteristic is Q = 0.707 for both the first low-pass filter 25 and the second low-pass filter 28.
[0026]
FIG. 4 is a waveform diagram of signals output from the acceleration sensor 12 during walking.
As shown in FIG. 4, the conditions due to the landing of the foot are as follows: (1) Peak value ≧ 0.25G, (2) This peak becomes maximum in 0.3 seconds before and after.
Assuming that the walking cycle of the person being measured is approximately 0.5 seconds per step, there is a peak that satisfies the above conditions (1) and (2) when walking or moving at a faster pace (jogging, running, etc.). There are 3 or more in 1.5 seconds. At this time, the data from the first peak to the third peak corresponds to two steps of movement. Hereinafter, a waveform corresponding to the two steps is referred to as a “two-step waveform”.
[0027]
Thus, when the waveform of the signal output from the acceleration sensor 12 is a two-step waveform, it can be determined that the measurement subject is in a dynamic state (running state). When the waveform of the signal output from the acceleration sensor 12 does not satisfy the above conditions (1) and (2), it can be determined that the person to be measured is in a static state (stop state).
Furthermore, when it is determined that the vehicle is in a dynamic state (jogging or running state), it is necessary to determine the movement intensity.
[0028]
The moving intensity mentioned here is synonymous with the intensity of movement, specifically, the difference between whether the person being measured is walking, jogging, or running. .
For the determination of the movement intensity, the variance of the two-step waveform of acceleration in the front-rear direction and the vertical direction is used.
[0029]
FIG. 5 is a graph showing the relationship between the vertical acceleration and the variance of the two-step waveform. FIG. 6 is a graph showing the relationship between the longitudinal acceleration and the variance of the two-step waveform.
As shown in FIG. 5 and FIG. 6, when the walking is compared with the jogging state or the traveling state, the degree of dispersion of the acceleration in the jogging state and the traveling state increases. Further, the difference between the jogging state and the running state appears in a distributed manner in the longitudinal acceleration from the waveform diagram of FIG.
[0030]
From the difference in these characteristics, in the case of (S _x ² > 0.5) ∩ (S _x ² > 0.3) → flat ground running state (S _x ² > 0.5) ∩ (S _x ² ≤0.3) ) → jogging state S _x ² ≦ 0.5, → each walking state can be determined as walking state.
[0031]
FIG. 7 is a graph showing the relationship between the acceleration obtained by the preliminary experiment and the change in atmospheric pressure.
When the jogging state or the walking state is determined, or when it is determined that the state is a static state, the ascending / descending operation is determined from the relationship between the acceleration and the atmospheric pressure change.
The output V ₀₂ of the atmospheric pressure processing system of the above-described equation (2) is a signal representing a temporal change in atmospheric pressure, and is information on the moving speed in the vertical direction. Accordingly, here, the average value V ₀₂ of the output V ₀₂ in each processing unit section calculates, performs determination by using the value V _02.
[0032]
As shown in FIG. 7, the vertical movement is discriminated by providing boundary values (threshold values) P _up and P _down for the average value V ₀₂ of the output V ₀₂ . Furthermore, the final movement form is discriminated by combining the vertical movement information with the static state, walking state, and jogging state information.
[In static state]
If V ₀₂ > P _up → Ascending by elevator P _down ≤ V ₀₂ ≤ P _up → Stopping
If V ₀₂ <P _down → descending by elevator (when walking)
If V ₀₂ > P _up → During stair climbing P _down ≤ V ₀₂ ≤ P _up → Walking on flat ground
If V ₀₂ <P _down → While _{moving down} the stairs (when jogging)
If V ₀₂ > P _up → go _up the stairs by jogging P _down ≤ V ₀₂ ≤ P _up → walking on flat ground
In the case of V ₀₂ <P _down → During the downward movement of the stairs, it is possible to accurately determine the operation state of the measurement subject from the relationship between the acceleration and the change in atmospheric pressure.
[0033]
FIG. 8 is a graph showing an example of the operation pattern of the measurement subject.
As shown in FIG. 8, the movement form can be estimated from the change in the movement state of the measurement subject determined as described above. Note that the movement pattern of the person being measured is different from one person to another and changes with time. Therefore, the movement pattern of the person being measured is represented as such a graph, although it is not always the pattern shown in FIG. Can do.
[0034]
FIG. 9 is a flowchart for explaining the determination process of the movement form executed by the arithmetic circuit 15 and the calorie consumption calculation process according to the movement form.
As shown in FIG. 9, when the power is turned on, various parameters (weight, height, age, sex) required for the calorie consumption calculation of the measurement subject in step S11 (hereinafter, “step” is omitted). Check biological conditions such as In the next S12, when various conditions of the measurement subject are input, an instruction to start calculation is waited for.
[0035]
When the calculation start instruction is input, the process proceeds to S13, and the acceleration signal detected by the acceleration sensor 12 is read. Subsequently, in S14, an atmospheric pressure detection signal (absolute pressure signal) from the atmospheric pressure sensor 13 is read.
In the next S15, the acceleration signal from the acceleration sensor 12 is analyzed to predict the motion state of the measurement subject. That is, as described above, it is determined based on the acceleration signal from the acceleration sensor 12 whether the measurement subject is walking, running, or jogging (see FIGS. 5 to 8). At the same time, it is determined from the change in the acceleration signal detected by the acceleration sensor 12 whether the subject's movement state is the acceleration region or the deceleration region.
[0036]
In addition, since the triaxial acceleration sensor 12 is used in the present embodiment, the traveling direction of the measured person can be determined by calculating the acceleration in each direction by detecting and calculating the longitudinal, vertical and horizontal accelerations of the measured person. It can be predicted from the relative relationship, and the walking path of the person being measured can be estimated.
Further, in S16, by analyzing the atmospheric pressure detection signal (absolute pressure signal) from the atmospheric pressure sensor 13, the change in the vertical direction when the subject moves can be obtained, and the presence / absence of the lifting operation is determined from the atmospheric pressure change. To do. That is, it is possible to determine whether the measurement subject is moving up and down a staircase or a hill, or a state where the person is moving up and down by an elevating means such as an elevator or an escalator, based on a change in atmospheric pressure detected by the atmospheric pressure sensor 13.
[0037]
In the next step S17, the analysis result of the acceleration signal from the acceleration sensor 12 and the analysis result of the atmospheric pressure detection signal (absolute pressure signal) from the atmospheric pressure sensor 13 are analyzed together to analyze the movement state (walking) of the subject. State, traveling state, deceleration / acceleration state, and elevation state).
Subsequently, the process proceeds to S18, in which the consumed calorie coefficient value corresponding to the exercise state of the measurement subject obtained in S17 is selected to determine the consumed calorie coefficient value of the current calculation. In S19, the calorie consumption coefficient value set in S18 is multiplied by the number of steps to calculate the total calorie consumption corresponding to the exercise amount of the person being measured.
[0038]
Thereafter, the total calorie consumption calculated as described above in S20 is stored in the memory 18 and the external memory 22, and the total calorie consumption is displayed on the display unit 17. In the next S21, it is confirmed whether or not there is an instruction to stop the calculation. When the power is turned off and there is an instruction to stop the calculation, a series of calculation processing is ended. However, if there is no instruction to stop the calculation in S21, the process returns to S13, and the processes after S13 are executed.
[0039]
Therefore, when the calculation stop command is not input in S21, the detection signals from the acceleration sensor 12 and the atmospheric pressure sensor 13 are continuously read by repeating the processes in and after S13, and the exercise state of the person to be measured is based on each detection signal. (A combination of walking state, running state, deceleration / acceleration state, and raising / lowering state) is determined, and calorie consumption is calculated according to the exercise state of the person being measured. Then, the total calorie consumption is obtained by adding the calorie consumption corresponding to the exercise state of the measurement subject.
[0040]
Moreover, since the calorie consumption calculation apparatus 11 has the acceleration sensor 12 and the atmospheric pressure sensor 13, it can obtain | require the amount of calories consumed of a to-be-measured person, and can estimate the movement path | route within use time. Therefore, for example, it is possible to grasp an action pattern in a narrow range such as a hospital or a specific facility by collation with map information.
[0041]
Further, the calorie consumption calculation device 11 can estimate a movement route in a wide range by using it together with a gyroscope or a geomagnetic sensor. And by calculating | requiring the relationship between a movement path | route and consumption calories using the consumption calorie calculating apparatus 11, when taking a walk, for example, the walk course suitable for oneself can be set.
Furthermore, since the movement of the elevator or the like in an upright state can be estimated from the detection value from the atmospheric pressure sensor 13, the walking path of the person to be measured can be grasped in a three-dimensional manner, and can be applied to grasping the behavior of an elderly person, for example. .
[0042]
Further, since calorie consumption according to the exercise state of the measurement subject can be accurately predicted, it can be applied to, for example, the medical field or the esthetic field. Furthermore, by setting the target consumption calorie, it becomes possible to give an instruction of the amount of exercise to the measurement subject within a safe range.
In the above-described embodiment, the configuration in which the acceleration sensor 12 and the atmospheric pressure sensor 13 are accommodated in the same case 23 as the arithmetic circuit 15 has been described as an example. It is also possible to configure the arithmetic circuit 15 separately. For example, the acceleration sensor 12 and the atmospheric pressure sensor 13 may be fixed at the waist position of the measurement subject, and the arithmetic circuit 15 other than the sensor may be stored in another place such as a pocket.
[0043]
The acceleration sensor 12 uses a sensor with a measurable sensitivity direction of three axes. However, in order to determine the walking state, two axes in the vertical direction and the front-rear direction or a single axis sensor may be used. Needless to say, it doesn't matter.
[0044]
【The invention's effect】
As described above, according to the present invention, the first low-pass filter having a cut-off frequency of 10 Hz for reducing the noise included in the detection signal output from the atmospheric pressure sensor and the differential noise included in the time differential signal are removed. And a second low-pass filter with a cutoff frequency of 0.3 Hz , it becomes possible to more accurately detect a change in atmospheric pressure when the subject moves up and down the stairs, and the second low-pass filter. In order to determine the up / down movement based on the barometric pressure signal output from the filter, and further to determine the movement state of the person to be measured based on the signal from the step sensor and the barometric pressure signal, for example, ascending / descending the stairs or going up / down the hill Even when the lifting / lowering operation is performed, the calorie consumption corresponding to the actual exercise state can be accurately obtained. In addition, it is possible to extend the battery life by reducing the power consumption associated with the calculation, and the measurement time can be extended.
[0045]
In addition, each motion state (flat-ground walking / running, stair climbing, hill walking / running, etc.) can be determined more accurately, and a value close to calorie consumption according to the actual motion state can be estimated.
[Brief description of the drawings]
FIG. 1 is a block diagram for explaining one embodiment of a calorie consumption calculating apparatus according to the present invention.
FIG. 2 is a diagram showing a wearing state of the consumption calorie calculation device.
FIG. 3 is a block diagram illustrating a waveform processing circuit of a detection signal output from an atmospheric pressure sensor 13;
FIG. 4 is a waveform diagram of signals output from the acceleration sensor 12 during walking.
FIG. 5 is a graph showing the relationship between vertical acceleration and variance of two-step waveform.
FIG. 6 is a graph showing the relationship between the longitudinal acceleration and the variance of the two-step waveform.
FIG. 7 is a graph showing the relationship between acceleration and atmospheric pressure change obtained by a preliminary experiment.
FIG. 8 is a graph showing an example of an operation pattern of a measurement subject.
FIG. 9 is a flowchart for explaining a movement form determination process and a consumption calorie calculation process corresponding to the movement form executed by the arithmetic circuit 15;
[Explanation of symbols]
11 Calorie consumption calculation device 12 Acceleration sensor 13 Barometric pressure sensor 14 Sensor interface circuit 15 Calculation circuit 16 Setting switch 17 Display unit 18 Memory 20 Decoder circuit 21 External terminal 22 External memory

Claims (1)

A step sensor for detecting the number of steps of the person being measured;
A calorie consumption calculating unit for calculating calorie consumption from the biological condition of the measurement subject and the number of steps detected by the step sensor;
Storage means for storing a calculation result calculated by the consumption calorie calculation unit;
In a calorie consumption calculation device having
An atmospheric pressure sensor for detecting a change in atmospheric pressure according to the up and down movement;
A first low-pass filter and the cutoff frequency is 10 Hz to reduce noise contained in the detection signal output from the pressure sensor,
A differentiating circuit for differentiating the signal output from the first low-pass filter to generate a time differential signal of atmospheric pressure, and extracting a signal waveform corresponding to the ascending / descending operation of the measured person;
A second low-pass filter with 0.3 Hz cut-off frequency to remove the differential noise contained in the time derivative signal,
Determining means for determining an up / down motion based on an atmospheric pressure signal output from the second low-pass filter, and further determining an exercise state of the person to be measured based on a signal from the step sensor and the atmospheric pressure signal;
A calorie consumption calculation device characterized by comprising:

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