WO1997015028A1 - Appareil de mesure de cadence, dispositif electronique et procede de mesure de cadence - Google Patents
Appareil de mesure de cadence, dispositif electronique et procede de mesure de cadence Download PDFInfo
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- WO1997015028A1 WO1997015028A1 PCT/JP1996/003032 JP9603032W WO9715028A1 WO 1997015028 A1 WO1997015028 A1 WO 1997015028A1 JP 9603032 W JP9603032 W JP 9603032W WO 9715028 A1 WO9715028 A1 WO 9715028A1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C22/00—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers
- G01C22/006—Pedometers
Definitions
- the present invention relates to a pitch measuring device for measuring a pitch indicating the frequency of movement of a body such as a foot during walking or running, an electronic device having a pitch measuring function, and a pitch measuring method. More specifically, the present invention relates to a technique for obtaining a pitch from a body motion signal detected during running or walking.
- a pitch meter that acquires a body motion signal by means of detecting a body motion (body motion) such as an acceleration sensor and obtains a pitch from the body motion signal.
- the conventional pitch meter employs, for example, a method of amplifying a body motion signal and then counting the pulses obtained by pulse conversion.
- the pulse waveform obtained by this method has an irregular pulse interval depending on the running state, and the power is set by setting a predetermined threshold value.
- the pulses are generated in units of two shots using a mask signal for which a predetermined insensitive time can be set.
- the pitch that indicates the frequency of movement of the left and right feet and hands during running is usually 150 to 200 times per minute, which is converted into a pulse cycle of 0.3 seconds. ⁇ 0.4 seconds. Therefore, by adopting a mask signal with a mask time of 0.5 seconds, which is the insensitive time, the pulse signal obtained by converting the body motion signal can be counted in units of two shots. Can be counted as a pulse of 0.6 seconds to 0.8 seconds. Therefore, the pitch can be measured with high accuracy.
- the mask signal in order to measure the pitch during traveling and walking with a conventional pitch meter, the mask signal must be switched between running and walking before starting the pitch measurement. External operation to replace is required. If the switching operation is not performed before the measurement, the pitch cannot be measured with high accuracy, and only meaningless data may be obtained. Furthermore, in an electronic device equipped with a plurality of functions in addition to the function of measuring pitch, the user needs to remember an operation method for switching a mask signal. Easy to use.
- an object of the present invention is to provide a pitch measuring device that does not require switching by an external operation between running and walking. It is another object of the present invention to provide a pitch measuring device that can easily measure a pitch with good accuracy in both running and walking situations. The objective is to provide a user-friendly electronic device that can easily perform pitch measurement even for electronic devices equipped with multiple functions in addition to the pitch measurement function. ing. Therefore, in the present invention, traveling It is also an object of the present invention to provide a pitch measurement method that can automatically determine whether a motion signal is a motion signal during walking or a motion signal during walking, and derive a pitch at each time. Further, the present invention provides a pitch measuring device and a pitch measuring method capable of accurately discriminating running and walking even when there is noise measured together with a body motion signal. It is intended for this purpose. Disclosure of the invention
- the inventors of the present application performed frequency analysis of the results of detection of body movement (body movement) during running and walking using a body movement sensor such as an acceleration sensor.
- a body movement sensor such as an acceleration sensor.
- harmonics such as the second harmonic, which is a wave of twice the fundamental frequency of the body, and the third harmonic, which is a wave of three times the frequency, are obtained. It has been found that the intensity distribution of these harmonics has remarkable characteristics. In other words, while traveling, the second harmonic having an intensity (level) of several times (about 3 to 10 times) the intensity of the fundamental wave having the frequency of body motion is obtained.
- the level of the second harmonic was equal to or lower than the level of the fundamental wave of body motion, and that a higher level of the third harmonic could be obtained.
- body movement is measured with an acceleration sensor, etc., attached to the body such as an arm, a signal that captures changes in acceleration caused by vertical movement of the body, arm swing, etc. is obtained as a body movement signal . Therefore, when the vehicle is running, when the right foot is stepped and when the left foot is stepped, strong vertical movement occurs almost equally, resulting in an intensity corresponding to the second harmonic of body movement. It is considered that a high (high level) body motion signal can be obtained.
- the level of the second harmonic is small, and is about the same as or smaller than the fundamental wave of body motion.
- the level of the fundamental wave which is the same as the period of body motion, is considered to be higher than that of the second harmonic.
- high-level third harmonics corresponding to these harmonic vibrations can be obtained.
- the pitch measuring device of the present invention includes a body movement sensor for detecting body movement, a frequency analysis unit for frequency-analyzing the detection result of the body movement sensor, and an analysis of the frequency analysis unit. And a pitch deriving means for obtaining a pitch at the time of running or walking based on the result.
- the pitch deriving means has a power in a region equal to or higher than the first set frequency in the analysis result. Set a signal above a predetermined level as a reference wave to be referred to determine the pitch, and this reference wave is the second or third harmonic for body motion Judgment is made to ask for pitch.
- the pitch during running and walking often indicates twice the frequency of the body motion, that is, the frequency of the second harmonic. Therefore, in the pitch guiding means, when the reference wave is determined to be the second harmonic, the frequency of the reference wave is output as the pitch, and the reference wave is the third harmonic. When it is determined that the frequency is 2/3 of the reference wave frequency, it is desirable to output it as a pitch.
- the traveling time is determined only by determining whether the signal is the second harmonic or the third harmonic without using a mask signal or the like. It is also possible to derive the pitch when walking and walking, and to set whether or not to run or walk, or to make a judgment for the user or the pitch.
- High-precision pitch at any time without the need to perform on the measuring device side Can be output. That is, according to the pitch measuring apparatus of the present invention, the setting can be accurately performed without switching the setting by an external operation or an internal operation during traveling or walking. Can be measured. Therefore, in addition to the pitch measurement function having a control device capable of processing a signal from a body motion sensor and a display device capable of displaying an output from the control device, an electronic device capable of mounting other functions. When the pitch is measured by using, the user does not need to make settings such as running or walking, and the pitch can be measured easily and reliably.
- the pitch during walking is generally 100 to 150 times per minute
- the pitch during running is generally 150 to 200 times per minute. Therefore, it can be expected that a frequency of 150-200 times / minute is obtained as the second harmonic and a frequency of 150-225 times / minute is obtained as the third harmonic. Signals at frequencies lower than the frequency are likely to be noise. Therefore, in the present invention, the first set frequency is, for example, about 100 times sufficiently lower than the frequency expected as the second harmonic and the third harmonic. By setting the value of, and evaluating signals of higher frequencies, it is possible to prevent erroneous pitch measurement due to the influence of noise.
- the first set frequency is not limited to the above value, but can be changed or adjusted depending on the person to be measured or the measurement environment.
- the determination of the second harmonic and the third harmonic includes, in the analysis result, at least one-third or two-thirds of the frequency of the reference wave.
- Harmonic checking means for determining whether there is a high-level signal near the frequency, and at least one-third or two-thirds of the frequency of the reference wave near at least one of the frequencies
- a signal discriminating means for judging that the reference wave is the second harmonic when it is judged that there is no high-level signal can be provided.
- analysis results The first wave check means for determining whether or not there is a high-level signal near the frequency of 1/3 of the frequency of the reference wave is adopted in the signal discriminating means.
- the reference wave When it is determined that there is no high-level signal near 1/3 times the frequency, the reference wave can be determined to be the second harmonic.
- a second wave confirmation means for determining whether there is a high-level signal near a frequency two-thirds of the frequency of the reference wave in the analysis result is adopted as the harmonic confirmation means.
- the reference wave When it is determined that there is no signal to perform, the reference wave can be determined to be the second harmonic.
- the harmonic checking means determines whether there is a high-level signal near both 1/3 and 2/3 times the frequency of the reference wave, and determines whether there is a high-level signal at the frequency of the reference wave. When there is no high-level signal near the frequency of 3/3 times, and when it is determined that there is no high-level signal near the frequency of 2/3 times the frequency of the reference wave, It is also possible to determine that it is the second harmonic.
- the pitch deriving means sets the frequency of the reference wave to the second. It is also possible to employ signal discriminating means for judging the reference wave to be the second harmonic when it is judged that the frequency is lower than the frequency.
- the expected frequency of the third harmonic obtained as a reference wave during walking is 150 to 225 times / minute, so that 150 times / minute is set as the second set frequency. If the frequency is lower than this frequency, it can be determined that it is the second harmonic. As a result, even if there is a high-level signal near a frequency that is 1/3 or 2/3 times the frequency of the reference wave, the frequency of the reference wave does not exceed the second set frequency. Can determine that a high-level signal near the frequency of 1/3 or 2/3 is noise, and can determine that the reference wave is the second harmonic.
- a signal whose power is equal to or higher than a predetermined level in a region equal to or higher than the first set frequency in the analysis result is regarded as a reference wave.
- the pitch derivation step as in the above measuring device, when the reference wave is determined to be the second harmonic, the frequency of the reference wave is output as a pitch, and the reference wave is output as the second harmonic. If it is determined that the harmonic is a third harmonic, it is desirable to output 2/3 of the frequency of the reference wave as a pitch.
- the analysis result in order to determine whether the signal is the second harmonic or the third harmonic, includes 1/3 times or 2/3 of the frequency of the reference wave.
- a harmonics check process to determine if there is a high level signal near at least one of the frequencies, and at least one-third or two-thirds of the frequency of the reference wave It is possible to employ a process having the above-described functions, such as a signal discriminating process for judging that the reference wave is the second harmonic when it is judged that there is no high-level signal near the frequency. it can.
- Such a pitch measurement method of the present invention can be provided as software having the above-described steps, and can be used for a computer such as a magnetic recording medium or a ROM. Alternatively, it can be provided by recording it on a medium that can be read by a microprocessor or the like.
- FIG. 1 is an explanatory diagram showing the appearance and use state of a portable electronic device equipped with a pitch measurement function of the present invention.
- FIG. 2 is a block diagram showing a schematic configuration of the portable electronic device shown in FIG.
- FIG. 3 is a block diagram showing a schematic configuration of the pitch measuring device mounted on the electronic device shown in FIG.
- FIG. 4 is a diagram showing an example of a spectrum obtained by performing a frequency analysis of a body motion signal, and FIG. 4 (a) shows an example of a spectrum obtained during traveling. 4 (b) shows an example of the spectrum obtained during walking.
- FIG. 5 is a flowchart showing a process in the pitch measuring device shown in FIG.
- FIG. 6 is a plan view of the main body of the portable electronic device shown in FIG. FIG.
- FIG. 7 is an explanatory diagram when the main body of the portable electronic device shown in FIG. 1 is viewed from the 3 o'clock direction of the wristwatch.
- FIG. 8 is a cross-sectional view of a pulse wave detection sensor unit used in the portable electronic device shown in FIG.
- FIG. 9 is a schematic diagram of the pulse wave detection device mounted on the electronic device shown in FIG.
- FIG. 10 is an explanatory diagram showing each mode of the portable electronic device shown in FIG.
- FIG. 11 (a) is an explanatory diagram showing a guide display when the clock mode is selected
- FIG. 11 (b) is an explanatory diagram showing a state in which the guide display has disappeared.
- FIG. 12 is an explanatory diagram for explaining functions of the portable electronic device shown in FIG.
- FIG. 13 (a) is an explanatory diagram showing the contents of the display indicating that the mode has been switched to the running mode as a pitch meter and pulse meter, and Fig. 13 (b) shows the measurement in this mode.
- FIG. 9 is an explanatory diagram showing display contents before starting.
- Fig. 14 (a) shows the display mode after the pulse rate measurement is started and before the pulse rate reaches a predetermined range in the running mode as a pitch meter and a pulse meter.
- Fig. 14 (b) is an explanatory diagram showing the display form after the pulse rate has reached a predetermined range, and Fig. 14 (c) shows the temporal change of pitch.
- FIG. 15 (a) shows the case where the pulse rate is within the predetermined range after the operation to stop the pulse rate measurement has been performed on the portable electronic device shown in Fig. 1.
- Fig. 15 (b) shows the display form.
- FIG. 8 is an explanatory diagram showing a display form when the user deviates from the range.
- Fig. 16 (a) is a waveform diagram of a conventional pitch meter after pulse conversion of the body motion signal during running
- Fig. 16 (b) is a conventional pitch meter when walking.
- FIG. 4 is a waveform diagram after pulse conversion of a body motion signal.
- FIG. 1 shows an arm-mounted portable electronic device having a pitch measurement function according to the present invention.
- This portable electronic device 1 has a timekeeping function that can be used as a wristwatch, a pulse measurement function that can measure and display pulse waves, and an arm or foot during running and walking. It has a pitch measurement function that can measure the pitch that indicates the frequency of body movement.
- the portable electronic device 1 of the present invention includes an apparatus main body 10 having a wristwatch structure, and inside the main body 10, a user's body movement (body movement) is provided.
- a body motion sensor 90 such as an acceleration sensor for detecting an acceleration and a control unit 5 for realizing each of the above-described functions are housed.
- the surface of the main body 10 is provided with a liquid crystal display 13 that displays various data such as time, pulse, pitch, etc., and also functions as a user interface.
- a liquid crystal display 13 that displays various data such as time, pulse, pitch, etc., and also functions as a user interface.
- a pulse wave detection sensor 30 is attached to the main body 10 via a cable 20 so that a pulse wave can be detected from a fingertip.
- Such a main body 10 has a clockwise direction of 12:00 o'clock (hereafter, all directions related to the main body 10 are in the time direction.
- FIG. 2 is a block diagram showing a schematic configuration of the electronic device 1 of the present example.
- the electronic device 1 of the present example mainly includes a control unit 5 configured by a microprocessor or the like, and programs and data for processing by the control unit 5 are included.
- ROM 3 that stores data in advance
- RAM 4 that is used to store a primary storage area for processing, measured data, and the like
- an operation unit 2 that operates a control unit 5.
- the operation unit 2 is provided with various switches 11 1 to 11 provided on the surface or the periphery of the main body 10 as described above.
- the electronic device 1 of the present example is provided with the liquid crystal panel 13 for user interface as described above, and the liquid crystal panel 13 has a time, measured data, and further processed data. Information such as the mode is displayed.
- the electronic device 1 of the present example further includes a real-time clock (RTC) unit 6 having an oscillation function for measuring time, measuring time and date, and the like.
- RTC real-time clock
- a timekeeping processing unit 54 is configured to perform various timekeeping processes that will be described later together with the operation of the electronic device by utilizing the function of the unit 6.
- the electronic device 1 of this example has a pitch measurement unit 5 6 that can perform pitch measurement by processing a signal from the body movement sensor 90 housed in the main body 10 by the control unit 5.
- a pulse measuring unit 55 capable of measuring a pulse by processing a signal from a pulse wave sensor 30 connected to the main body 10 by a cable 20 by the control unit 5.
- FIG. 3 shows the configuration of the pitch measuring section 56 in this example in further detail.
- the body movement is detected by the body movement sensor 90 and the signal is input to the body movement signal conversion section 561 of the control section 5.
- the body motion signal converter 561 amplifies the signal obtained by the body motion sensor 90, converts the signal into digital data that can be easily processed, and outputs the digital data to the body motion signal storage unit 562 of the RAM 4. To temporarily accumulate. Of course, it is also possible to continuously accumulate this data, supply it to a processing device such as a computer later, and use it as data for analyzing a pixel. .
- the data stored in the body motion signal storage unit 562 is acquired at predetermined intervals by the frequency analysis unit 569 of the control unit 5 and subjected to frequency analysis.
- the frequency analysis unit 569 reads out the signal stored in the body motion signal storage unit 562 and performs a fast Fourier transform (FFT process) as a frequency analysis on the signal. It is provided with a calculation unit 563 and a body motion component extraction unit 564 that can extract the frequency and signal strength (level) as the body motion component from the result of the frequency analysis.
- the body motion component extracted by the body motion component extraction unit 564 is supplied to a pitch derivation unit 560 configured in the control unit 5, and the pitch derivation unit 560 extracts the motion component.
- a pitch during running or walking is derived, and the result can be output to the liquid crystal display device 13.
- the pitch deriving unit 560 is a reference wave that refers to a signal whose signal strength is equal to or higher than a predetermined level in an area equal to or higher than a predetermined frequency (first set frequency) to obtain a pitch.
- a first wave checker 5 that determines whether there is a high-level signal near a frequency that is one third of the frequency of the specified reference wave.
- a second wave checker 5 6 7 that determines whether there is a high level signal near the frequency 2/3 times the frequency of the reference wave, and a first wave checker 5 6 6 determines that there is no high-level signal near 1/3 the frequency of the reference wave, and the second wave checker 5 6 7 determines that there is a signal near the frequency 2/3 the frequency of the reference wave.
- High level signal When it is determined that there is no signal, a signal discriminating unit 568 for judging that the specified reference wave is the second harmonic of the fundamental wave having the fundamental frequency of the body motion is provided.
- the signal discriminating unit 568 based on the confirmation results of the first wave confirming unit 566 and the second wave confirming unit 567, outputs a high-level signal near one-third the frequency of the reference wave. Or a high-level signal near a frequency that is two-thirds the frequency of the reference wave, the specified reference wave is converted into the third harmonic of the fundamental wave of body motion.
- the reference wave is determined to be the third harmonic, and when the reference wave is determined to be at or above the predetermined frequency (second set frequency), it is determined that the reference wave is the third harmonic. When it is determined that the reference wave is lower than or equal to the second set frequency, the reference wave is determined to be the second harmonic.
- FIG. 4 shows an example of a signal (spectrum) obtained by the body motion signal calculation unit 566 and the body motion component extraction unit 564.
- FIG. 4 (a) shows an example of a spectrum obtained during running
- FIG. 4 (b) shows an example of a spectrum obtained during walking.
- the pitch measurement unit 56 of this example automatically detects such a difference in the spectrum. It is possible to measure the pitch automatically and accurately while driving or walking by grasping the object.
- the swing of the arm is equivalent to the swing motion of the swing of the arm as one cycle, and the fundamental wave of body motion is obtained.
- the level of the fundamental wave due to the swing of the arm is weakened.
- acceleration is applied at each moment of arm swinging and pulling back. Therefore, the body motion sensor detects the second harmonic of the fundamental wave of the arm swing with high intensity. Due to these causes, the second harmonic at a level much higher than the level of the fundamental wave of body motion can be obtained during running.
- the line spectrum SB1 corresponding to the fundamental wave of the body motion and the second harmonic of the fundamental wave of the body motion A line spectrum SB 2 corresponding to the wave component and a line spectrum SB 3 corresponding to the third harmonic component of the fundamental wave of the body motion appear.
- the body motion does not move up and down as much as when running, and the fundamental wave component of the body motion caused by the hand shake appears strongly.
- a strong line spectrum SB 1 appears.
- the ratio of each line spectrum SB 1 and SB 2 is not constant, the line wave of the fundamental wave with respect to the line wave SB 2 of the second harmonic wave is compared with that during traveling.
- the ratio of SB 1 increases during walking.
- a line spectrum SB 3 indicating the third harmonic appears, and a line spectrum SB 1 corresponding to the fundamental wave of the body motion and a line spectrum corresponding to the third harmonic component.
- the level of SB3 is higher than that of SB2, which corresponds to the second harmonic component.
- the pitch during driving (usually refers to the frequency of the second harmonic) Is often 150 to 200 times / minute, and the pitch during walking is 100 to 150 times / minute, so the second harmonic during running is high.
- the third harmonic during walking appear in almost the same frequency band. Therefore, by identifying a high-level signal that is equal to or higher than a predetermined frequency (the first set frequency), it is possible to determine whether the signal is the second harmonic or the third harmonic. Thus, it is possible to automatically determine whether the motion is due to the body motion during running or the walking motion. Then, the frequency is output as a pitch if it is the second harmonic, and 2/3 of the frequency is output as a pitch if it is the third harmonic. High-precision pitch can be displayed or output regardless of the situation.
- 100 times / minute which is lower than the frequency band where the second or third harmonic is expected to appear, is used as the first frequency.
- the line spectrum SA2 corresponding to the second harmonic during traveling the line spectrum SB2 corresponding to the second harmonic during walking, and the third harmonic during walking.
- the line spectrum SB3 corresponding to the wave is a target that can be identified as the reference wave.
- the third harmonic appears as a high-level signal in the frequency region of 100 times / minute or more, so if this signal can be determined to be the third harmonic, this signal
- the pitch during walking can be determined from the value obtained by multiplying the frequency of the pedestrian by 2/3 times.
- the second harmonic of the fundamental wave appears as a high-level signal in the frequency region of 100 times / min or more, so this signal can be determined to be the second harmonic. If The pitch during running can be obtained from the frequency of this signal.
- the pitch deriving unit 560 of the pitch measuring unit in this example utilizes the difference between the running and walking spectra to make a pitch. The process for obtaining the switch will be described.
- step ST1 a signal (line spectrum) having the highest level is specified from the spectrum extracted after the frequency analysis using the signal specifying unit 565. This signal is specified as the reference wave that is referred to when determining the pitch.
- step ST2 it is determined whether or not the frequency (Fb) of this reference wave is equal to or more than 100 times / minute which is the first set frequency. If the frequency of the reference wave is less than 100 times / minute, in step ST3, the signal having the highest level is searched for from among the signals excluding the preceding signal. In Step ST3, if a corresponding signal is not found, the processing described below is bypassed and the process proceeds to the signal discriminating unit 568.In Step ST10, the previously derived pi The process is terminated with the pitch as the current pitch.
- step ST3 if a signal of the next level is detected in step ST3, the process proceeds to step 4 and a signal having the highest level is selected from among the signals excluding the previous signal. Specify the reference wave. Then, returning to step ST2, it is determined whether the frequency is equal to or higher than the first set frequency.
- step ST5 the signal is identified using the first wave confirmation unit 566. Is a signal near the frequency 1/3 times the frequency Fb of the reference wave that has a strength (amplitude or level) that is at least 1/2 times the strength (amplitude or level) of the reference wave? Determine whether or not. If the reference wave is the third harmonic, it is 1/3 of the frequency Fb of the reference wave A high-level signal indicating the fundamental wave of body motion should appear in the vicinity. By detecting this, it is possible to determine whether the signal is the second harmonic or the third harmonic.
- the above-described line spectrum is used. If there is a high-level signal in the range of +/- 1 resolution of the frequency resolution at which the vector can be obtained, it is desirable to judge that there is a high-level signal at 1/3 of the frequency of the reference wave. In the case where a higher resolution is provided, it is desirable to select a frequency band corresponding to the resolution as a judgment target.
- step ST5 when it is determined that there is no signal having a level equal to or more than 1/2 times the level of the reference wave near a frequency 1/3 times the frequency Fb of the reference wave, step ST6 Move to In step ST6, a signal having a level equal to or more than 1/2 times the level of the reference wave is present in the vicinity of a frequency 2/3 times the frequency of the reference wave using the second wave check section 567. Determine whether or not. If the reference wave is the third harmonic, a high-level signal indicating the second harmonic should appear near / times the frequency F b of the reference wave, and this should be detected. Thus, it is possible to determine whether the signal is the second harmonic or the third harmonic. In this step as well, it is desirable to select a frequency band corresponding to the resolution at the time of frequency analysis as a judgment target, in the same manner as the above step.
- step ST5 and ST6 that is, the second harmonic or the second harmonic using one of the first wave confirmation section 566 and the second wave confirmation section 567 is used. It is of course possible to determine whether the signal is the third harmonic. Also, as in this example, step ST5 And step ST6, that is, both the first wave checker 566 and the second wave checker 567 determine whether the signal is the second harmonic or the third harmonic.
- the level of the fundamental wave or the second harmonic is very small, and even if the user performs a slightly different pattern of body movement than usual.
- the pitch can be accurately derived.
- whether or not the signal is a high level signal is determined based on whether or not the signal has a level equal to or more than 1/2 of the reference wave level. For example, if the signal from the body motion sensor is amplified and converted, and the frequency analysis is performed, the level of noise can be distinguished from the noise included in the signal. Needless to say.
- step ST5 and ST6 if there is no high-level signal near 1/3 and 2/3 times the frequency Fb of the reference wave, the S quasi-wave is equivalent to the second harmonic. It can be determined that the signal is Accordingly, the process proceeds to step 8, and the signal discriminating unit 568 derives the frequency Fb of the reference wave as a pitch as it is. Of course, when the frequency of body motion is derived as a pitch, it is also possible to derive 1/2 of the frequency Fb of the reference wave.
- step ST5 when there is a high-level signal near a frequency that is 1/3 of the frequency Fb of the reference wave, or in step ST6, the frequency Fb of the reference wave If there is a high-level signal in the vicinity of 2/3 times the frequency, the process proceeds to step ST7 and the frequency Fb of the reference wave is set to the second set frequency of 150 times / min. Judge whether it is above or not.
- the value of the second set frequency of 150 times / minute is a value 1.5 times the value of the first set frequency, which is 1.5 times / minute.
- the pitch during walking is 100 times / minute to 150 times / minute, which is the third harmonic. It is expected that a reference wave of 150 to 220 times / minute will be obtained.
- the pitch during running is 150 times / minute to 200 times / minute, which is almost the same as 150 times / minute to 200 times / minute as the second harmonic. It is expected that a reference wave in the same frequency band will be obtained. However, it is considered that the pitch of the walking pitch is more stable than the pitch of the running pitch, and a signal with a frequency of 150 times / minute or less can be obtained as the third harmonic. Sex is very small. Therefore, only when it is determined in step ST7 that the frequency Fb of the reference wave is equal to or more than 150 times / minute, the specified reference wave is determined to be the third harmonic.
- the frequency Fb of the reference wave is less than 150 times / minute, the high-level signal detected by step ST5 or ST6 is noisy, and The reference wave is determined to be the second harmonic.
- the value of the second set frequency of 150 times / minute is, of course, an example, and can be changed or adjusted according to the user or measurement conditions. Of course, there are good things to do.
- step ST7 by determining whether or not the signal is the second harmonic using the second set frequency, the frequency is 1/3 times the frequency of the reference wave or 2 times. Even if there is a high level of noise near the frequency of / 3 times, it is possible to prevent from being erroneously determined to be the third harmonic. Therefore, in the pitch measuring device of the present invention, it is possible to automatically derive an extremely accurate pitch according to a change in the situation during running or walking.
- step ST7 If it is determined in step ST7 that the reference wave is the second harmonic, the process proceeds to step ST8, and the frequency Fb of the reference wave is derived as the pitch as described above. . If it is determined that the reference wave is the third harmonic 10,000, the process proceeds to step ST9, where the frequency Fb of the reference wave is multiplied by 2/3, and the pitch is derived. The fundamental frequency of body movement is taken as the pitch Of course, it is only necessary to derive 1/3 of the frequency F of the reference wave.
- the pitch measuring section 56 having the functions described above can be realized as one of the functions of the multi-function electronic device 1 as in this example, and the pitch can be measured. Of course, it can be provided as a pitch meter with a single function to measure.
- the processing for obtaining the pitch described with reference to FIG. 5 is used as software when analyzing data obtained from a body movement sensor by a personal computer or the like. Of course, it is possible.
- software that uses the pitch measurement method of the present invention it is possible to automatically determine whether the user is in a running state or a walking state without having to specify whether the user is running or walking. It is possible, and it is possible to derive a pitch according to the state with extremely high accuracy, and it can be applied to various analysis programs.
- Such software can be used for magnetic recording media such as floppy disks and hard disks, other computers such as CDs and ROMs, or micro-processors. It can be provided in a readable medium. Overall configuration of portable electronic devices ⁇
- a pulse wave detection sensor unit 30 for measuring a pulse wave is connected to a device main body 10 having a wristwatch structure of the portable electronic device 1 of this example by a cable 20.
- a connector piece 80 is formed at the distal end of the cable 20, and the connector piece 80 is connected to a connector section 70 that is configured in the 6 o'clock direction of the main body 10. It is designed to be removably mountable.
- the pulse wave sensor unit 30 is a sensor It is attached between the base of the index finger and the knuckle while being shielded from light by the fixing pad 40, and the cable 20 is attached by being attached to the base of the finger. Is short and out of the way during the run.
- FIG. 6 shows the device main body 10 of the portable electronic device of the present example with the list band, cables, etc. removed
- FIG. 7 shows the portable electronic device 1. Is seen from the 3 o'clock direction of the main body.
- the device main body 10 of this example is provided with a watch case 11 (body case) made of resin, and the front side of the watch case 11 has a current time and date.
- a liquid crystal display device 13 (display device) with an EL backlight is configured to display a pitch during running or walking and pulse wave information such as a pulse rate. ing .
- the liquid crystal display device 13 has a first segment display area 13 1 located on the upper left side of the display surface, a second segment display area 13 2 located on the upper right side, and a lower right position.
- a third segment display area 13 3 and a dot display area 13 4 located at the lower left are provided, and the dot display area 13 4 displays various information in a graph. Dick display is possible.
- the watch case 11 has a built-in body movement sensor 90 for obtaining a pitch, and the body movement sensor 90 includes an acceleration sensor. Sensors can be used.
- a pitch is obtained based on the detection result (body motion signal) by the body motion sensor 90, and the pitch is obtained by the liquid crystal display device 13.
- a change in pulse rate and the like are obtained based on the detection result (pulse wave signal) by the pulse wave detection sensor unit 30 and the result is displayed on the liquid crystal display device 13.
- a control unit 5 that performs various controls and data processing is configured. Since the control unit 5 also includes a timekeeping circuit, normal time, wrap time, split time, and the like can be displayed on the liquid crystal display device 13.
- buttons 11-11 to 115 for external operations such as time adjustment and display mode switching are configured.
- large poten- tial switches 1 16 and 1 17 are formed on the surface of the watch case.
- a small button-shaped battery 59 for powering the portable electronic device 1 is housed, and the battery 59 is connected to the battery 59 via a cable 20. Power can also be supplied to the pulse wave detection sensor unit 30.
- the cable 20 is also used to input the detection result of the pulse wave detection sensor unit 30 to the control unit 5 of the watch case 11.
- the portable electronic device .1 of the present example is a multifunctional device, and it is necessary to increase the size of the device main body 10 as the number of functions increases.
- the main unit 10 has a restriction of being worn on the arm, it is difficult to expand the device main body 10 toward 6:00 or 12 o'clock in a wristwatch. Therefore, in this example, the main unit 10 has a horizontally long watch case 11 whose length in the directions of 3 o'clock and 9 o'clock is longer than those in the directions of 6 o'clock and 12 o'clock.
- a control unit or other functional unit for realizing many functions can be stored.
- a flat pressure element 58 for the buzzer is arranged at 9 o'clock of the battery 59, and the battery 59 that is heavier than the piezoelectric element 58 is 3
- the center of gravity of the device S main body 10 is biased in the direction of 3 o'clock in the position deviated in the hour direction. Since the list band 12 is connected near the position of the center of gravity, the apparatus main body 10 can be mounted on the arm in a stable state.
- the battery main body 10 is thinned by arranging the battery 59 and the piezoelectric element 58 on a flat surface, and furthermore, as shown in FIG. By providing the lid 118, the user can easily replace the battery 59.
- the watch shaft 11 is used to hold the stop shaft 12 1 attached to the end of the end 12.
- the connecting portion 105 is formed.
- the rest band 12 wrapped around the arm is folded back at an intermediate position in the longitudinal direction, and is used to hold this intermediate position.
- a receiving portion 106 to which the fasteners 122 are attached is formed.
- the part from the rear part 1 19 to the receiving part 106 is molded integrally with the watch case 11 and is about 115 ° with respect to the rear part 119.
- the rotation stop part 108 forms an angle of. That is, when the main body 10 is mounted on the right wrist L (arm) on the upper surface L1 (the back of the hand) by the re- splay band 12, the watch case 1 The back surface 1 19 of 1 is in close contact with the upper surface L 1 of the wrist L, while the rotation stopping portion 108 is in contact with the side surface L 2 having the radius R. In this state, The back part 1 19 of the main body 10 is like straddling the radius R and the ulna U.
- the bend part 109 between the rotation stop part 108 and the back part 1 19 to the rotation stop part 10 By 8 the user feels abutting the radius R.
- the rotation stopping portion 108 and the back surface portion 119 form an anatomically ideal angle of about 115 °, the main body 10 of the device is pointed at the arrow A.
- the device main body 10 does not unnecessarily move around the arm L even if the user tries to turn in the direction of the arrow B.
- FIG. 8 shows, using a cross section, the configuration of a pulse wave detection sensor unit 30 mounted on the electronic device 1 of the present example.
- the sensor unit 30 for pulse wave detection of the present example has a back cover 302 on the side of the sensor frame 36 as a case body, and a component storage space 3 on the inside. 0 0 is configured.
- a circuit board 35 is arranged inside the component storage space 300, and the circuit board 35 is mounted with an LED 31, a phototransistor 32, and other electronic components. ing.
- the end of the cable 20 is fixed to the pulse wave detection sensor unit 30 by a bush 393, and each wiring of the cable 20 is soldered on the pattern of each circuit board 35. As shown in Fig.
- the pulse wave detection sensor unit 30 is configured such that the cable 20 is pulled out from the base of the finger to the device body 10 side. Attach to finger. Therefore, the LED 31 and the phototransistor 32 are arranged along the length direction of the finger. The ED 31 is located at the tip of the finger, and the phototransistor 32 is located at the base of the finger. By arranging in this way, it is possible to provide an effect that external light does not easily reach the phototransistor 32.
- a light transmitting window is formed by a light transmitting plate 34 made of a glass plate on the upper surface portion (effective pulse wave signal detecting section) of the sensor frame 36,
- the LED 31 and the phototransistor 32 are arranged with the light-emitting surface and the light-receiving surface facing the light-transmitting plate 34, respectively.
- the phototransistor 32 can receive the light reflected from the finger side of the light emitted from the LED 31.
- the outer surface 34 1 of the light-transmitting plate 34 protrudes from its surrounding portion 36 1 so that the outer surface 34 1 of the light-transmitting plate 34 can be more closely adhered to the finger surface. It has become.
- an LED 31 is an InGaN (indium-gallium-nitrogen) blue LED, and its emission spectrum is 4
- 5 O nm has an emission peak, and the emission wavelength range is from 350 nm
- a GaAsP-based (gallium-arsenic-phosphorus-based) photodiode is used as the phototransistor 32.
- a transistor is used, and the light-receiving wavelength region of the element itself has a main sensitivity range from 300 nm to 600 nm, and a sensitivity range below 300 nm.
- the pulse wave detection sensor unit 30 of this example is attached to the base of the finger by the sensor fixing band 40, and in this state, light is emitted from the LED 31 toward the finger.
- the phototransistor 32 When this light reaches the blood vessels, a part of the light is absorbed by hemoglobin in the blood and a part of the light is reflected. Reflected from fingers (blood vessels) The received light is received by the phototransistor 32, and a change in the amount of received light corresponds to a change in blood volume (pulse wave of blood). That is, when the blood volume is large, the reflected light becomes weak, and conversely, when the blood volume becomes small, the reflected light becomes strong. Therefore, the pulse rate can be measured by detecting the change in the reflected light intensity.
- the LED 31 has an emission wavelength range from 350 nm to 600 nm, and the photodetection wavelength range is from 300 nm to 600 nm.
- the transistor 32 is used in the wavelength region from about 300 nm to about 600 nm, which is the overlapping area, that is, in the wavelength area of about 700 nm or less.
- the biological information is displayed based on the detection result. If such a pulse wave sensor unit 30 is used, even if the external light hits the exposed part of the finger, the light having a wavelength range of 70 O nm or less out of the light included in the external light can be obtained. However, the finger does not reach the phototransistor 32 (light receiving section) as a light guide.
- the reason is that light having a wavelength range of 70 O nm or less contained in external light tends to be hard to transmit through the finger, so the external light is covered with the sensor fixing band 40. This is because even if a part of the finger is not irradiated, it does not reach the phototransistor 32 through the finger.
- the light-receiving wavelength range is 350 nm. Ranges from nm to 120 O nm. In this case, the pulse wave can be detected based on the detection result of light having a wavelength of ⁇ that can easily reach the light receiving section with a finger as a light guide. As a result, erroneous detection due to fluctuations in external light is likely to occur.
- the S / N ratio of a pulse wave signal based on a change in blood volume is high.
- hemoglobin in blood has a wavelength of 30 O nm to 70 O nm.
- the absorption coefficient for light up to ⁇ ⁇ is several times to about 100 times or more larger than the absorption coefficient for wavelength of 880 nm, which is the conventional detection light, so it changes sensitively to changes in blood volume. This is probably because the pulse wave detection rate (S / N ratio) based on the change in blood volume is high.
- FIG. 9 shows a schematic configuration of a pulse wave measuring unit 55 that measures a pulse rate and the like based on an input result from the pulse wave detection sensor unit 30.
- the pulse wave measurement unit 55 amplifies the signal input from the pulse wave detection sensor unit 30 via the cable 20 by the pulse wave signal conversion unit 5 51 of the control unit 5. Then, the digital signal is converted into a digital signal and output to the pulse wave signal storage unit 552 of the RAM 4.
- the pulse wave data temporarily stored in the pulse wave signal storage unit 552 is read out by the pulse wave signal calculation unit 553 of the control unit 5 and subjected to fast Fourier transform (FFT processing) as frequency analysis. Done.
- FFT processing fast Fourier transform
- the result is input to the pulse wave component extraction unit 554, and the pulse wave component extraction unit 554 extracts the pulse wave component from the input signal from the pulse wave signal calculation unit 553.
- the pulse rate is output to the pulse rate calculator 555, and the pulse rate calculator 555 calculates the pulse rate based on the frequency component of the input pulse wave and displays the result on the LCD. Output can be made to device 13.
- the portable electronic device 1 of this example has a time measurement function, a pulse wave measurement function, and a pitch measurement function, and is used in combination with the clock mode, the stopwatch mode, and the time measurement.
- the mode can be switched to a pulse meter mode that measures pulse wave information, and a mode that measures pitch.
- each mode of the portable electronic device 1 of the present example will be described.
- Figure 10 shows the modes performed in the portable electronic device 1 and the corresponding modes.
- the display contents of the liquid crystal display device 13 are schematically shown.
- Step ST11 indicates the clock mode
- the first segment display area 1331 indicates that it is Monday on 1 February 6, 1994.
- the second segment display area 1 32 displays that the current time is 10: 08: 59: 59 pm.
- TIME is displayed as the current mode is the clock mode.
- TIME is displayed only for a few seconds immediately after this clock mode is selected.
- Nothing is displayed in the third segment display area 133.
- the portable electronic device 1 of this example generates an alarm sound when, for example, one hour elapses when the push switch 1 11 in the 2 o'clock direction is pressed in the clock mode.
- the alarm occurrence time can be set arbitrarily.
- the push switch 13 at 1 o'clock is pressed, the EL light of the liquid crystal display 13 turns on for 3 seconds, and then turns off automatically. It has become so.
- step ST 12 Pressing the button switch 1 1 2 in the 4 o'clock direction from this mode switches to the running mode (step ST 12).
- This mode is used when the portable electronic device 1 is used as a stopwatch.
- the running mode the current time is displayed in the first segment display area 13 1 before the measurement starts (standby state), and the second segment display area 13 In FIG. 2, "0: 0 00 ': 00": 00 is displayed.
- the dot display area 1 34 the graphic is switched after displaying "RUN" for only 2 seconds as a guide display indicating that the mode is the running mode.
- step ST 13 Pressing the potency switch 1 12 at 4 o'clock from this mode switches to the wrap time recall mode (step ST 13).
- This mode is for reading out wrapper split times measured in the past using the portable electronic device 1.
- the recall mode of the wrap time the date is displayed in the first segment display area 131, and the current time is displayed in the second segment display area 1332.
- "LAP / RECALL" is displayed for only 2 seconds as a guide display indicating that the mode is the recall mode, and then the pulse rate for each of the latest laps is displayed. The transition of the number is displayed.
- Step ST 14 Pressing the button switch 1 12 in the 4 o'clock direction from this mode switches to the recall mode (step ST 14) of the pulse wave measurement result.
- this mode the time change of the pulse rate measured and stored using the portable electronic device 1 at the time of a marathon, etc. performed in the past, and the portable electronic device 1 can be used.
- This is a mode to read out the temporal change of pitch measured in the past by using.
- the recall mode the date is displayed in the first segment display area 131, and the current time is displayed in the second segment display area 1332.
- ": RESULT / RECALL" is displayed for only 2 seconds, and then a graph showing the temporal change of the average pulse rate is displayed.
- step ST 11 pressing the power switch 1 12 at 4 o'clock again returns to the clock mode (step ST 11) as shown by the arrow P 1. .
- step ST12 to ST14 if there is no input for 10 minutes, the clock mode (step ST11) is selected as indicated by arrow P2. ) Automatically return to.
- the date is displayed in the first segment display area 131, and the current time is displayed in the second segment display area 1332. You.
- the dot display area 1334 returns to the clock mode as shown in an enlarged view in FIG. 11 (a).
- “TIME” is displayed, but this guidance display automatically disappears after 2 seconds as shown in Fig. 11 (b), and the normal state (step ST 15).
- the normal state of the clock mode nothing is displayed in the dot display area 134.
- a dot display is displayed for the minimum time required to guide the user to the mode, and a mode display indicating that the display is in the normal state of the clock mode when the dot disappears. In this way, power savings are achieved.
- the mode is automatically switched to the running mode (step ST12).
- the running mode not only operates as a stopwatch, but also can measure the pitch and pulse rate during the running. .
- Fig. 12 when the mode is switched to the running mode that functions as a pitch meter and a pulse meter (step ST31), as shown in Fig. 13 (a).
- the current time is displayed in the first segment display area 13 1 of the liquid crystal display device, and “0: 0 0 ′:” is displayed in the second segment display area 13 2.
- 0 0 ": 0 0” is displayed, and "RUN” is displayed in the dot display area 134.
- the heart symbol flashes in the third segment display area 1 3 3 and the mode switches to the running mode that can function as a pitch meter and pulse meter. Display this.
- step ST32 the display of “STOP / 5” (step ST32) and the display of “MOTI ⁇ N / 4” are displayed in the dot display area 1334.
- ST 3 3) is performed alternately at 2 Hz, and is displayed as immobile for 5 seconds. The number displayed at this time is a countdown for 5 seconds, and will be switched.
- the apparatus is in a standby state until the button switch 11 located on the upper surface of the apparatus main body 10 is pressed (step ST 3). Four ) .
- the original waveform of the pulse wave signal is graphically displayed in the dot display area 1334, as shown in FIG. 13 (b).
- the original waveform displayed here is the latest data. Therefore, before starting the time measurement (marathon), if the waveform and level of the original waveform of the pulse wave signal are checked, the LED 31 Pass / fail can be determined in detail.
- Position 2 can be set to the optimal position.
- it can be checked in advance whether or not the environment is such that the ambient temperature and humidity can be measured. Further, such a function can be used for the inspection of the portable electronic device 1 at the time of manufacturing.
- the original waveform is displayed graphically, it is possible to check whether the time axis fluctuates due to battery exhaustion or the like.
- the initial pulse rate “75” obtained from the pulse conversion is displayed in the third segment display area 1332.
- Step ST35 As shown in Fig. 14 (a), these measurement results first show the elapsed time in the second segment display area 132, and the dot display area 1 34 Shows a graphical display of the pulse rate over time.
- the graphic display to be performed at this time is a bar graph extending from the lower side to the upper side with the pulse rate 65 at a substantially middle position of the vertical axis.
- the third segment display area 133 shows the scale of the vertical axis of the graph displayed in the dot display area 134 and the pulse rate at that time. Is displayed.
- the pulse rate when the pulse rate falls within the range (within the specified range of pulse rate from 120 to 1668), the pulse rate becomes as shown in Fig. 14 (b).
- the number is graphically displayed as a difference from a preset reference pulse rate (step ST36).
- the graphic display to be performed at this time is as follows. For example, a pulse rate of 150 is set at a substantially middle position of the vertical axis, and a portion corresponding to a difference from this value is changed up and down (positive- This is a bar graph extending in the negative direction).
- a mark indicating the specified range of the pulse rate is displayed at the right end of the dot display area 134.
- the time change of the pitch is displayed graphically in the dot display area 1 34.
- the graphic display at this time is, as shown in FIG. 14 (c), a polygonal line graph in which the approximate middle position of the vertical axis is, for example, pitch 170 (times / minute). is there.
- the third segment display area] 33 shows the scale of the vertical axis of the graph displayed in the dot display area 1 34 (the approximate middle position of the vertical axis is Is displayed), and the pitch at that time is displayed.
- the time change of the pitch is different from the display of the pulse rate such as a line graph. Runners can see what information the current display shows just by looking at the display format Can be easily determined.
- the electronic device 1 of the present example does not have a switch for setting whether the vehicle is running or walking, and the electronic device 1 is in any state.
- press the button switch 1 14 at 8 o'clock again to display the dot display area.
- the display returns to the state where the time change of the pulse rate is displayed in step 4 (step ST36).
- step ST 38 pressing the button switch 116 located below the front surface of the device main body 10 will cause the wrapper at that time to be the first wrapper.
- the segment is displayed in the segment display area 13 1 (step ST 38). Then, after 10 seconds, the flow automatically returns to step ST36.
- Step ST 39 the time display of the pulse rate after the goal is graphically displayed as a pulse recovery characteristic in the dot display area 1 34 ( Step ST 4
- the graphic display of this pulse recovery characteristic first remains on the scale where the pulse rate is 150 at the approximate center of the vertical axis. Switch to bar graph display extending from bottom to top. Then, as shown in Fig. 15 (b), the recovery characteristics for 2 minutes are measured. During this time, the third segment display area 133 shows the scale of the vertical axis of the graph displayed in the dot display area 134 and the pulse rate at that time. Is done.
- Step ST 4 1 the dot display area 13
- the temporal change of the pulse rate in each marathon is displayed (step ST42). If you press the button switch 114 at 8 o'clock, “PITCH / RESULT” is displayed in the dot display area 134 for 1.5 seconds (step ST 43), the dot display area 134 displays the time change of the pitch in the current marathon (step ST44).
- step ST45 a state in which the temporal change of the pulse rate after the goal is displayed in the dot display area 13 4 is graphically displayed as a pulse recovery characteristic (step ST4). Return to 4 0).
- pressing the button switch 1 16 located below the surface of the main unit 10 stores the result in the dot display area 1 34.
- "PROTECT / MEMO? Y” is displayed (step ST46), and press the button switch 1 17 located on the upper surface of the main unit 10. If the answer is "YES”, "MEMORY” is displayed in the dot display area 134 as the result is being stored (step ST47), and after 2 seconds Returns to the initial state (step ST31).
- pressing the potentiometer 1 12 at 4 o'clock causes the ratchet as shown in Fig. 10.
- the mode switches to the recall mode (step ST13). From this mode, press the button switch 1 1 2 at 4 o'clock to switch to the pulse wave measurement result recall mode (step ST 14). . Even in this mode, the dot display area 1334 can graphically display the temporal change in pitch and pulse rate. From this state, pressing the position switch 1 1 2 in the 4 o'clock direction will change the clock mode (step mode). Return to ST 1 1).
- the date is displayed in the first segment display area 133 and the current time is displayed in the second segment display area 132. Also, in the dot display area 134, it is assumed that the watch mode has been returned.
- the portable electronic device of the present example is a device having various display and measurement functions, and performs various displays such as a lap, a pulse, and a pitch while performing a marathon or the like. And so on.
- pitch measurement can be performed with a single button operation, and there is no need to set any conditions such as running or walking. It is. Therefore, the user can display the pitch as soon as he / she desires, and immediately obtain a high-precision pitch because there is no need to set the conditions such as running or walking.
- the operation for measuring or displaying the pitch is easy, the operation of measuring the pitch is not bothersome, and the pitch can be displayed at any time and the body, running, or walking can be easily performed. It can be grasped at any time.
- the pitch measuring device, the electronic device, and the pitch measuring method according to the present invention when the body motion signal is subjected to frequency analysis, the first time is obtained during walking and running. As a high-level signal that appears in the frequency range of a set frequency, for example, 100 times / minute or more, the third harmonic appears when walking, and the second harmonic appears when running. Find and use this difference to automatically and accurately pick pitch in any state It can be derived. Therefore, according to the present invention, the pitch can be obtained accurately and quickly both in running and walking, and when running and walking. This eliminates the need for an external operation to switch modes and changes in the analysis mode, making it possible to easily obtain a high-precision pitch.
- whether the reference wave for which the pitch is to be obtained is the second harmonic or the third harmonic is determined by, for example, the frequency of 1 Z 3 Alternatively, it can be determined by whether or not there is a high-level signal near 2/3. In addition, even when there is a high level of noise near a frequency that is 1/3 or 2/3 times the frequency of the reference wave, the frequency of the reference wave is maintained at a predetermined frequency level. It is possible to configure so that the reference wave is determined to be the third harmonic only when it is determined to be equal to or higher than the (second set frequency). By adopting such a double-checkable measuring device and measuring method, it is possible to judge whether it is the second harmonic or the third harmonic.
- the pitch measuring device or the pitch measuring method of the present invention it is possible to prevent erroneous judgments caused by noise, etc., beforehand, and to derive the pitch with higher accuracy ⁇
- the pitch measuring device or the pitch measuring method of the present invention the pitch during running and walking can be easily obtained. It is suitable for mounting a pitch measurement function on a multifunctional electronic device such as the one shown in the example. You can get a hitch.
- the present invention relates to a pitch measuring device and a pitch measuring method for measuring pitch during running or walking, and distinguishes between running and walking according to the present invention. It is possible to derive the pitch without any problem. Therefore, in a multi-function electronic device including the pitch measurement function, it is possible to obtain the pitch with a simple operation and with high accuracy, and to prevent erroneous measurement etc. be able to.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96935371A EP0805414B1 (en) | 1995-10-18 | 1996-10-18 | Pace measuring apparatus, electronic appliance and pace measuring method |
DE69621594T DE69621594T2 (de) | 1995-10-18 | 1996-10-18 | Schrittmessvorrichtung, elektronisches gerät und schrittmessverfahren |
US08/849,872 US5908396A (en) | 1995-10-18 | 1996-10-18 | Pitch measurement device, electronic instrument, and pitch measurement method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7/270394 | 1995-10-18 | ||
JP7270394A JPH09114955A (ja) | 1995-10-18 | 1995-10-18 | ピッチ計 |
Publications (1)
Publication Number | Publication Date |
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WO1997015028A1 true WO1997015028A1 (fr) | 1997-04-24 |
Family
ID=17485655
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP1996/003032 WO1997015028A1 (fr) | 1995-10-18 | 1996-10-18 | Appareil de mesure de cadence, dispositif electronique et procede de mesure de cadence |
Country Status (5)
Country | Link |
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US (1) | US5908396A (ja) |
EP (1) | EP0805414B1 (ja) |
JP (1) | JPH09114955A (ja) |
DE (1) | DE69621594T2 (ja) |
WO (1) | WO1997015028A1 (ja) |
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EP0947160B1 (en) | 1997-08-26 | 2006-03-01 | Seiko Epson Corporation | Pulse wave diagnosing device |
JP3689914B2 (ja) * | 1997-09-05 | 2005-08-31 | セイコーエプソン株式会社 | 生体情報計測装置 |
US6527711B1 (en) * | 1999-10-18 | 2003-03-04 | Bodymedia, Inc. | Wearable human physiological data sensors and reporting system therefor |
US20060122474A1 (en) | 2000-06-16 | 2006-06-08 | Bodymedia, Inc. | Apparatus for monitoring health, wellness and fitness |
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US7689437B1 (en) | 2000-06-16 | 2010-03-30 | Bodymedia, Inc. | System for monitoring health, wellness and fitness |
WO2005029242A2 (en) | 2000-06-16 | 2005-03-31 | Bodymedia, Inc. | System for monitoring and managing body weight and other physiological conditions including iterative and personalized planning, intervention and reporting capability |
MXPA02012643A (es) | 2000-06-23 | 2004-09-10 | Bodymedia Inc | Sistema para monitorear la salud, el estado general y la condicion fisica. |
US6826477B2 (en) | 2001-04-23 | 2004-11-30 | Ecole Polytechnique Federale De Lausanne (Epfl) | Pedestrian navigation method and apparatus operative in a dead reckoning mode |
TWI264524B (en) * | 2002-02-25 | 2006-10-21 | Seiko Instr Inc | Pace measuring device |
JP2003315085A (ja) * | 2002-02-25 | 2003-11-06 | Seiko Instruments Inc | ペース計測装置 |
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- 1996-10-18 EP EP96935371A patent/EP0805414B1/en not_active Expired - Lifetime
- 1996-10-18 US US08/849,872 patent/US5908396A/en not_active Expired - Lifetime
- 1996-10-18 DE DE69621594T patent/DE69621594T2/de not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
DE69621594D1 (de) | 2002-07-11 |
DE69621594T2 (de) | 2002-09-19 |
EP0805414A4 (en) | 1999-06-02 |
EP0805414A1 (en) | 1997-11-05 |
JPH09114955A (ja) | 1997-05-02 |
EP0805414B1 (en) | 2002-06-05 |
US5908396A (en) | 1999-06-01 |
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