JP2010240158A - Energy consumption calculator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy consumption calculator suitable for a mountain climbing application. <P>SOLUTION: The energy consumption calculator includes a storage section 34 storing strides and weights and a control section 20. The control section calculates a distance walked on the basis of the strides and the number of steps based on data from vibration sensor sections (32 and 33d), measures elapsed time from a user input point to be a starting point, calculates the altitude on the basis of data from atmospheric pressure sensor sections (29 and 33a), distinguishes an ascent condition from a descent condition on the basis of the difference from the immediately preceeding calculated altitude, makes the sampling period of the atmospheric pressure sensor sections longer than the period of the vibration sensor sections in accordance with instructions of a user, calculates the accumulated ascent altitude difference in which the altitude difference from the starting point at every altitude calculation opportunity is accumulated when it is interpreted as one for an ascent and one accumulated descent altitude difference in which the altitude difference from the starting point at every altitude calculation opportunity is accumulated when it is interpreted as one for a descent, and calculates the energy consumption by substituting the weight, the elapsed time from the starting point, the accumulated ascent altitude difference, the accumulated descent altitude difference, the distance walked in a prescribed calculation formula, and displays the result of the calculation in a display device 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an energy consumption calculator, and more particularly to an energy consumption calculator suitable for use in calculating energy consumption during mountain climbing.

  The pedometer detects vibrations associated with walking using a vibration sensor and counts the number of steps based on the vibrations. Some pedometers calculate the walking distance by multiplying the number of steps by the step length. And the following patent document 1 describes an apparatus for further calculating energy consumption based on the number of steps. The device disclosed in Patent Document 1 uses an atmospheric pressure sensor to determine whether the walking state is going up or down. Non-Patent Document 1 below describes a research paper on energy consumption during mountain climbing.

Japanese Patent Laid-Open No. 11-347021

Nakahara Yuona, Sugawara Masahiro, Yamamoto Masayoshi, “Creating Formulas for Climbing Energy Consumption”, Climbing Medicine Japanese Journal of Mountain Medicine Vol.26: 115-121,2006,

  The pedometer described in Patent Document 1 is assumed to be attached to the waist or the like, and the energy consumption is basically calculated by multiplying the number of steps by a coefficient corresponding to the walking state. The coefficient is set according to the walking speed and elevation, and the walking speed is determined using an acceleration sensor, and the elevation is measured based on the increase / decrease of the atmospheric pressure measured at each sampling period. . That is, the atmospheric pressure sensor is used only to determine whether to move up or down. Note that the atmospheric pressure includes noise corresponding to the vertical movement associated with walking, and a complicated filtering process is required to remove this noise component.

  Non-Patent Document 1 describes a calculation formula for estimating energy consumption during mountain climbing. This calculation formula allows multiple subjects to wear a portable respiratory metabolism measurement device and actually climb a mountain, and actually measure the energy consumption based on the relationship between the oxygen intake and the respiratory exchange ratio. As a result, the relationship between the measured value and various parameters in the mountain climbing process was examined in detail. That is, the energy consumption value at the time of mountain climbing can be accurately obtained by using this calculation formula.

In addition, the extremely accurate energy consumption calculation formula (estimation formula) based on this actual measurement value is the energy consumption Q (kcal) for climbing, walking time T (h), walking distance D (km), and cumulative altitude The difference ΔHu (km), the descending cumulative height difference ΔHd (km), the weight Wb (kg), and the equipment weight We (kg) of the rucksack containing the contents are expressed by the following formula (1).
Q = (1.8 x T) + (0.3 x D + 10.0 x Hu + 0.6 x Δd) x (Wb + We) (1)
As described above, Patent Document 1 and Non-Patent Document 1 have the same basic idea of calculation while aiming to calculate energy consumption accompanying walking. This is because it is assumed that the pedometer described in Patent Document 1 calculates the amount of energy consumed in walking in daily life, in other words, in the city (town). Therefore, even if the energy consumption at the time of mountain climbing is calculated using the pedometer of Patent Document 1, the value is greatly different from the actual value. In particular, energy consumption during mountain climbing is important information for estimating fatigue and determining the timing of breaks, food and hydration, so that accurate values can be presented to users. desired.

  Accordingly, an object of the present invention is to provide an energy consumption calculator that can accurately calculate the energy consumption associated with mountain climbing. Other purposes will be clarified in the following description.

The main invention for achieving the above object is an energy consumption calculator,
Watch and
An indicator,
An operation input unit that accepts user input;
A vibration sensor unit that outputs vibration data associated with walking for each sampling period;
An atmospheric pressure sensor that outputs atmospheric pressure data for each sampling period;
A storage unit for storing weight and stride input by the user;
A control unit that executes a distance measurement process, a walking time measurement process, an altitude calculation process, an elevation determination process, a mode switching process, a cumulative altitude difference calculation process, an energy consumption calculation process, and a consumption curry display process; ,
With
The distance measurement process calculates the walking distance by multiplying the number of steps counted based on the vibration data by the step length,
The walking time measurement process starts from the point in time when a predetermined operation input is received, and measures the elapsed time from the starting point.
The altitude calculation process calculates the altitude by inputting barometric pressure data,
Ascending / descending determination processing determines the rising state or falling state based on the difference from the altitude calculated immediately before every altitude calculation opportunity,
The mode switching process switches to a mountain climbing mode in which the sampling period of the atmospheric pressure sensor unit is longer than the sampling period of the vibration sensor unit, according to the mode switching operation by user input,
Cumulative altitude difference calculation processing is performed in the climbing mode, when the altitude calculation opportunity from the starting point by the ascending / descending determination processing is determined to be the cumulative ascending altitude difference obtained by accumulating the altitude difference when it is determined as rising, and descent Calculate the cumulative descent altitude difference by accumulating the altitude difference of
The energy consumption calculation process calculates the energy consumption by substituting the weight, the elapsed time from the starting point, the accumulated ascent difference, the accumulated descending altitude difference, and the walking distance into predetermined formulas, respectively. ,
The energy consumption display process is an energy consumption calculator that displays the calculation result of the energy consumption calculation process on the display.

It is a figure which shows the change of the altitude calculated based on the atmospheric | air pressure measured when the test subject went uphill with the pressure sensor attached to the arm. It is a figure which shows the list computer which is one Embodiment of the energy consumption calculator of this invention. It is a figure which shows the pattern arrange | positioned at the liquid crystal display of the said list computer. It is a figure which shows the functional block structure of the said list computer. It is a figure which shows the change of the altitude calculated by the said list computer when it mounts | wears with the said wrist computer and climbs. It is a flowchart of the energy consumption calculation process in the said list computer. It is a figure which shows a state when energy consumption is displayed on LCD of the said list computer.

=== Purpose and spirit of the present invention ===
The energy consumption calculator of the present invention is characterized by the function of calculating energy consumption during mountain climbing. About the energy consumption by mountain climbing, it can obtain | require correctly, for example using said estimation formula (1). Therefore, the present inventor considered that an accurate energy consumption amount can be presented to the user if the energy consumption computer is configured to calculate the energy consumption amount based on the above estimation formula (1) when climbing. However, it has been found that there are various problems in realizing an energy consumption calculator for mountain climbing.

  First, climbing equipment is required to be the minimum necessary. For this reason, carrying an energy consumption calculator separately becomes an extra equipment even for a small device. In addition, the basic configuration of a conventional energy consumption calculator is a pedometer, which is generally premised on being attached to the waist substantially coincident with the center of gravity of the body. The same applies to the pedometer described in the above-mentioned Patent Document 1, and it should be possible to obtain an effect of minimizing a change in atmospheric pressure accompanying vertical movement by being attached to the waist.

  However, it is not always good to attach to the waist when climbing. For example, since a waist bag, a waist belt of a rucksack, or the like is attached to the waist, these climbing tools buffer the energy consumption calculator. There is also a possibility that the arm swinging during walking will hit the waist energy consumption calculator. Climbing clothes are also a problem. Layered clothing is basically used when climbing, and the number of clothing is increased or decreased depending on the temperature. Therefore, wearing a device on the waist is a hindrance when changing clothes. Above all, there is a high possibility that the device will be hidden by clothing, and if the device is hidden, operating the device on the waist or checking the information such as the energy consumption displayed is itself. It becomes a troublesome work.

  Focusing on the above energy consumption estimation formula (1), in the conventional energy consumption calculator such as Patent Document 1, although different coefficients are assigned according to ascending / descending, walking speed, etc., basically, Calculates energy consumption based on the number of steps, whereas energy consumption is calculated based on completely different parameters such as walking time and cumulative altitude difference.

  Here, regarding the conventional energy consumption calculator and the energy consumption calculator of the present invention, the problems related to the wearing part and the difference in parameters used for energy consumption calculation were examined. Currently, various sensors are installed. We focused on the fact that there are watches (outdoor watches) that can measure temperature, pressure, altitude based on air pressure, and direction. This watch is a wristwatch type or is equipped with a carabiner or the like and attached to the shoulder harness of a rucksack.

  If it is a timepiece, of course, it has a timekeeping function and can measure walking time, which is a parameter peculiar to energy consumption calculation when climbing. If it is a watch, it is always an equipment to carry with you for mountain climbing, and it does not get in the way. In addition, since it is necessary to wear it in a place where the time can be checked at any time, it is easy to check and operate the display. Furthermore, since the outdoor watch has an altitude measuring function, it can discriminate between an ascending state and a descending state based on a change in altitude over time. If it is integrated with the watch, it is not necessary to carry an energy consumption calculator separately, so that it is possible for a climber to reduce the cost of equipment. In addition, since the hardware configuration of the outdoor watch hardly needs to be changed, the cost increase of the single product can be substantially minimized. In view of these advantages, it was concluded that the energy consumption calculator for mountain climbing should preferably adopt the form of a watch equipped with an atmospheric pressure sensor such as an outdoor watch.

  Next, further studies were made on the assumption that the clock and the energy consumption calculator were integrated. As a result, the following problems that could not be assumed by conventional energy consumption calculators have occurred. First of all, the watch is always in an operating state, and if the watch is simply equipped with the function of an energy consumption calculator, in addition to the power necessary for its continuous operation, the complex for calorie calculation during the long climbing process. Power for information processing, in particular, an output from an atmospheric pressure sensor is constantly monitored and advanced calculation processing based on the output data is required. That is, it is difficult to reduce power consumption. Watches are indispensable for mountaineering, so running out of battery during mountaineering can be a serious problem for climbers.

  Further, the wearing part of the watch is ideal for checking and operating the display, but there is a problem as an energy consumption calculator. Specifically, the above formula for calculating energy consumption during mountain climbing includes a term for multiplying the difference in elevation between the uphill and downhill by individual coefficients. It is a cumulative elevation difference. When the watch is mounted on a part away from the center of gravity of the body, the watch is greatly shaken with walking. Especially in wristwatches, the swing becomes larger. Therefore, the atmospheric pressure changes greatly in a short time. That is, a large difference in altitude due to a change in atmospheric pressure occurs in a short time. For example, even if walking is actually only climbing, it is detected as descending walking, and unnecessary descending altitude differences are cumulatively added.

  FIG. 1A is a graph obtained by converting a barometric pressure measurement value output from a barometric sensor to a high altitude when the barometric sensor is attached to a subject's arm and climbed up. The altitude change curve 10 based on the measured atmospheric pressure generally rises while vibrating according to the swing of the arm with respect to the actual altitude change 11. As described above, the energy consumption estimation formula (1) for mountain climbing includes the accumulated elevation difference as a parameter, and the accumulated elevation difference means that all the amplitudes of this vibration are accumulated. FIG. 1B shows an enlarged part 100 of the graph. The elevation difference in elevation at a certain time Δt is actually ΔH. However, during this Δt, the descending altitude difference ΔHd accompanying the vibration is cumulatively added. Also, an altitude difference ΔHu that is much larger than the actual altitude difference is cumulatively added as an elevation altitude difference. Therefore, even if the energy consumption in actual mountaineering can be accurately obtained by the estimation formula (1), if the machine calculates the energy consumption based on the estimation formula (1), the calculation result is actually This is far from the energy consumption.

  The present invention has been made in view of such various problems. And it aims at solving these problems. In addition to the main invention described above, the present invention also includes an energy consumption calculator having the following features.

The control unit performs a walking state determination process for determining whether or not the walking state is based on vibration data from the vibration sensor unit, and determines that the walking state is not determined by the walking state determination process. Stopping the walking time measurement by the walking time measurement process and the cumulative addition of the height difference by the cumulative altitude difference calculation process for a certain period.
Having a wristband for wearing on a person's arm.

=== Basic configuration of energy consumption calculator ===
FIG. 2 is an external view of the energy consumption calculator in the embodiment of the present invention. The energy consumption calculator 1 is a wristwatch type equipped with a band 2 for wearing on an arm, and the basic structure and configuration are provided with a liquid crystal display (LCD) 4 on the front surface of a case 3 as a dial. It is the same as a digital wristwatch. A plurality of buttons 5 for operating the energy consumption calculator (hereinafter referred to as a list computer) 1 are disposed on the side of the case 3.

  FIG. 3 shows a display pattern of the LCD 4. Icon pattern 41 for displaying specific characters and figures exclusively, 7-segment pattern 42 for displaying numbers, and two dot matrix patterns with different display areas for bitmap display of text and figures (Main dot pattern 43a, sub dot pattern 43b) are provided.

  FIG. 4 shows a functional block configuration of the list computer 1. The hardware configuration of the list computer 1 is the same as that of an outdoor watch equipped with various sensors (29 to 32) and displaying information such as temperature, atmospheric pressure, altitude, and direction. A computer main body including the MPU 20, the RAM 21, and the ROM 22 is used as a controller, and various programs executed by the MPU 20 are stored in the ROM 22. In addition, a flash memory 34 is incorporated as an external storage.

  The oscillation circuit 23 and the frequency dividing circuit 24 are circuits that generate clocks having various frequencies, and generate a reference clock for operating the MPU 20 and a clock related to a time measuring function such as a time display and a stopwatch. The display control unit 25 displays various types of information on the LCD 4 in accordance with instructions from the MPU 20, and the operation control unit 26 inputs operation signals from the operation buttons 5 to the MPU 20. The sound control unit 28 drives the speaker 27 in accordance with an instruction from the MPU 20 and outputs sound such as an alarm sound.

  Furthermore, in addition to the atmospheric pressure sensor 29, the temperature sensor 30, and the azimuth sensor 31, in addition to the atmospheric pressure sensor 29, the temperature sensor 30, and the direction sensor 31, vibrations associated with walking are provided in order to realize a function (outdoor function) for providing users with various information intended for outdoor use. A sensor 32 for detection is provided. In this embodiment, the acceleration sensor 32 is employed. And the signal which each sensor (29-32) outputs is digital data (atmospheric pressure data, temperature data, azimuth | direction data) in the A / D conversion circuit (33a-33d) corresponding to each sensor (29-32). , Vibration data) and input to the MPU 20.

  The MPU 20 executes a predetermined program stored in the ROM 22 in response to an operation signal from the operation control unit 26, writes the execution result of the program into the RAM 21, and reads out the written data from the RAM 21. To do. The MPU 20 also stores various data from the A / D conversion circuits (33a to 33d) connected to the sensors (29 to 32) in the RAM 21 so that they can be read out while being updated at every sampling opportunity.

  Further, necessary information is generated at any time based on the stored various data and stored in the RAM 21. For example, the altitude is calculated based on the atmospheric pressure data from the atmospheric pressure sensor 29 and the relationship between the atmospheric pressure and the altitude stored in advance, and the calculation result is stored.

  The list computer 1 also has a pedometer function, stores the step length input by the user in the flash memory 34, and the MPU 20 analyzes vibration data from the acceleration sensor 32 to extract vibrations associated with walking. The number of steps is counted based on the vibration, or the walking distance is calculated by multiplying the number of steps by the step length. Then, the walking distance starting from the time when the user performs a predetermined operation input is calculated, and the calculation result is updated and stored in the RAM 21.

  The list computer 1 having the above configuration displays information related to the outdoor function and the clock function, the execution result of information processing, and the like on the LCD 4 and outputs an alarm sound from the speaker 27 under the control of the MPU 20.

  Furthermore, the list computer 1 has an energy consumption calculation function linked with a pedometer function. Moreover, when calculating the energy consumption during mountain climbing, the energy consumption is continuously calculated even during a long process with low power consumption, and is included in the energy consumption estimation formula (1) during mountain climbing. As for the accumulated altitude difference, it is possible to prevent erroneous detection of ascending / descending due to arm swinging, etc., and to accurately calculate the accumulated altitude difference for each of ascending and descending.

=== Operation mode ===
As described above, the energy consumption calculation formula in the city is different from the energy consumption estimation formula when climbing. When the list computer 1 accepts a predetermined user input, the list computer 1 changes a program for calculating the energy consumption, thereby changing the program for calculating the energy consumption by assuming a behavior in the city; It operates in two modes of climbing mode, which calculates the energy consumption at the time.

  Note that the energy consumption calculation processing in the town mode is the same as that of the energy consumption calculator described in Patent Document 1 and the like, and basically the number of steps is converted into energy consumption. The MPU 20 inputs the atmospheric pressure data from the atmospheric pressure sensor at the same short sampling cycle as the vibration data, determines the ascending / descending state based on the altitude change based on the atmospheric pressure data, and measures the walking speed based on the vibration data from the acceleration sensor. To do. In this embodiment, the sampling frequency of vibration data and atmospheric pressure data is 8 Hz.

  In this way, sampling the atmospheric pressure data at a high frequency in the city mode may cause the up and down to switch in a short time, such as up and down stairs, or the up and down state lasts for a short time in the city. This is because it is necessary to constantly monitor the atmospheric pressure data in order to be in a walking state. Note that in city mode, it is not necessary to calculate the cumulative elevation difference, so even if there is an altitude change due to arm swing, it is only necessary to determine whether it is up or down, so the vibration of the atmospheric pressure data by shortening the sampling period Is not a big problem.

  In addition, regarding the increase in power consumption by shortening the sampling period, there is an opportunity to replace the battery in the city. When the wrist computer 1 operates with a secondary battery, there are many charging opportunities unlike when climbing. Of course, there is almost no danger in the city due to the lack of time.

  And, the energy consumption amount is calculated by multiplying the number of steps by a predetermined coefficient according to various walking states, such as a walking state on a flat road and a walking state with raising and lowering, normal walking and jogging with different steps, etc. The calculation result is displayed on the LCD 4.

  The outline of the energy consumption calculation function in the city mode has been described above. Below, the function which calculates energy consumption by mountain climbing mode is demonstrated.

=== Climbing mode ===
The ROM 22 stores a program for switching the operation mode of the mountain climbing mode upon receiving a predetermined user input and calculating the energy consumption based on the above-described energy consumption estimation formula (1) during mountain climbing. When the MPU 20 is switched to the mountain climbing mode, the sampling period of the atmospheric pressure data is made slower than the sampling period of the vibration data. In this embodiment, in the city mode, the sampling frequency of the atmospheric pressure data and the vibration data is both 8 Hz, which is a high frequency. This is because, as described above, in the city mode, the daily behavior of the user changes frequently, such as going up and down stairs or walking on a flat road, and it is necessary to constantly monitor the atmospheric pressure data. is there. That is, in the city mode, the sampling period of the atmospheric pressure data cannot be delayed. In addition, in the city, there are movements that do not involve walking, such as elevators and escalators, as well as movements that involve walking such as stairs and hills. Whether or not you are in a walking state can be determined by monitoring the output of vibration data, so the pressure data is the same as the vibration data in order to determine vertical movement with walking and vertical movement without walking. It is necessary to sample at a short cycle.

  On the other hand, the up-and-down movement during mountain climbing is always accompanied by walking, and ascending and descending continues for a long time. Therefore, the sampling period of atmospheric pressure data can be lengthened. In this embodiment, the sampling period of atmospheric pressure data is set to 0.1 Hz. That is, the atmospheric pressure data is sampled only once every 10 seconds. In climbing, the ascending and descending states do not frequently change in about 10 seconds. And by increasing the sampling period of atmospheric pressure data by 80 times compared to 8 Hz in the city mode, the process of acquiring atmospheric pressure data, the process of calculating altitude based on atmospheric pressure data, and ascending / descending based on the altitude difference for each sampling circumference And the process of accumulating elevation differences according to elevation are performed at a frequency of 1/80, and power saving can be achieved.

  FIG. 5 shows a graph when the barometric pressure sensor is attached to the arm of the subject and the hill is moved up, the barometric pressure data sampling period is set to 0.1 Hz, and the barometric pressure data is converted to high altitude. Compared with the graph shown in FIG. 1 earlier, since the sampling period is longer, the altitude change calculated for each sampling is sufficiently larger than the altitude change due to arm swing, and the calculated altitude change curve 11 b It becomes a locus along the altitude change curve 11. Therefore, even if a slight altitude error occurs depending on the position of the arm at each sampling opportunity, there is no amplitude fluctuation that accumulates in the downhill altitude difference, and down (up) The altitude difference is not added, and the energy consumption during mountain climbing can be calculated accurately. This also means that altitude changes associated with arm swing can be ignored without complicated smoothing processing. If complicated processing is unnecessary, it is not necessary to install the MPU 20 having a high processing capability, and it can be expected that the list computer 1 is provided at a lower cost.

=== Calculation of energy consumption ===
FIG. 6 shows the flow of energy consumption calculation processing in the mountain climbing mode. According to the user input, the mode is switched to the mountain climbing mode, and the atmospheric pressure data sampling cycle is set to 0.1 Hz (s1 → s2). Further, the user inputs the weight Wb and the equipment weight We included in the energy consumption estimation formula (1) prior to mountain climbing, and the MPU 20 stores these numerical values in the flash memory 34 (s3). It is assumed that the stride has already been stored in the flash memory 34 before that.

  When the MPU 20 receives a user input indicating the start of mountain climbing, the MPU 20 measures the time from this input time point, counts the number of steps based on the vibration data, and calculates the walking distance by multiplying the coefficient by the step length. (S4 → s5, s6). Further, every time the vibration data is sampled 40 times, the altitude based on the atmospheric pressure data is calculated at a rate of 1 degree, and the altitude is acquired by storing it in the RAM 21 (s7 → s8). Then, either the rising or falling state is determined according to the difference from the previous acquired altitude, and added to the previous accumulated altitude difference as the rising or falling altitude difference. Are stored in the RAM 21 or the like (s9, s10 → s11, or s9, s10 → s12 → s13). In addition, in a present Example, the calculation of walking time, walking distance, and an altitude difference can be temporarily suspended by assuming the break in the middle of mountain climbing and a user performing predetermined | prescribed operation. . This prevents unnecessary energy consumption from being added.

  When the user performs an operation to confirm the energy consumption or completes the mountain climbing process and inputs an operation to the end of the measurement, the walking time from the starting point, the walking distance, and the cumulative increase The energy consumption is calculated by substituting the altitude difference, the cumulative descending altitude difference, and the previously input body weight and equipment weight into the estimation formula (1), and the calculation result is displayed and output on the LCD 4 (s14 → s15, s16). Or s14 → s17 → s18, s19).

  FIG. 7 shows a state where the energy consumption is displayed on the LCD 4. An icon 41a indicating that it is operating in the mountain-climbing mode is displayed, a numerical value of energy consumption is displayed on the 7-segment pattern 42a for time display, and the unit “kcal” is displayed on the sub-dot pattern 43b. It is displayed. Further, the main dot pattern 43a indicates that the displayed information is energy consumption.

=== Other Embodiments ===
When taking a break in the middle of climbing, in the above embodiment, the measurement of walking time is paused in response to user input. Not only in this example, but if it is not possible to detect a state that is not in the walking state based on the vibration data, if the walking state is detected by temporarily suspending the measurement of the walking time from the starting point and the cumulative addition of the altitude difference For example, these measurements and processes may be resumed.

  In order to detect the walking state, when the vibration data from the vibration sensor is below a predetermined threshold or when the state below the threshold continues for a predetermined number of sampling opportunities, etc. Just judge.

1 list computer, 4 liquid crystal display, 5 operation buttons, 20 MPU,
21 RAM, 22 ROM, 25 display control unit, 26 operation control unit,
27 Speaker, 28 Voice control unit, 29 Barometric pressure sensor, 32 Vibration sensor,
34 Nonvolatile memory, 42, 42a 7 segment pattern 43a Main dot pattern area, 43b Sub dot pattern area

Claims (3)

Watch and
An indicator,
An operation input unit that accepts user input;
A vibration sensor unit that outputs vibration data associated with walking for each sampling period;
An atmospheric pressure sensor that outputs atmospheric pressure data for each sampling period;
A storage unit for storing weight and stride input by the user;
A control unit that executes a distance measurement process, a walking time measurement process, an altitude calculation process, an elevation determination process, a mode switching process, a cumulative altitude difference calculation process, an energy consumption calculation process, and a consumption curry display process; ,
With
The distance measurement process calculates the walking distance by multiplying the number of steps counted based on the vibration data by the step length,
The walking time measurement process starts from the point in time when a predetermined operation input is received, and measures the elapsed time from the starting point.
The altitude calculation process calculates the altitude by inputting barometric pressure data,
Ascending / descending determination process determines the rising state or falling state based on the difference from the altitude calculated immediately before every altitude calculation opportunity,
The mode switching process switches to a mountain climbing mode in which the sampling period of the atmospheric pressure sensor unit is longer than the sampling period of the vibration sensor unit, according to the mode switching operation by user input,
Cumulative altitude difference calculation processing is performed in the climbing mode, when the altitude calculation opportunity from the starting point by the ascending / descending determination processing is determined to be the cumulative ascending altitude difference obtained by accumulating the altitude difference when it is determined as rising, and descent Calculate the cumulative descending altitude difference by accumulating the altitude difference of
The energy consumption calculation process calculates the energy consumption by substituting the weight, the elapsed time from the starting point, the accumulated ascent difference, the accumulated descending altitude difference, and the walking distance into predetermined formulas, respectively. ,
In the energy consumption display process, the calculation result of the energy consumption calculation process is displayed on the display. An energy consumption calculator.   In Claim 1, the said control part performs the walking state discrimination | determination process which discriminate | determines whether it is a walking state based on the vibration data from the said vibration sensor part, and is set into a walking state by the said walking state discrimination | determination process. An energy consumption calculator characterized by stopping the walking time measurement by the walking time measurement process and the cumulative addition of the height difference by the cumulative altitude difference calculation process during a period when it is determined that there is no.   3. The energy consumption calculator according to claim 1, further comprising a wristband for wearing on a person's arm.

Images