JP4361231B2 - Electronic measuring equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device that measures various data in repetitive motion.
[0002]
[Prior art]
In order to maintain or improve health, swimming has attracted attention as well as walking or jogging. Conventionally, swimming skill has been evaluated only at the lap time in the 25 m pool or 50 m pool. In swimming, section records every 10 meters are measured by many people, but are only measured in large tournaments once a year. Recently, as a method of providing data to athletes, there has been a demand for a method of providing data immediately after a competition in which the player still has a feeling of being in competition. Athletes are beginning to feel that there is an advantage that they can grasp the weak points of the players that have not been understood so far by comparing their own senses with objective data. For this reason, there is an increasing demand to perform measurement every time in daily training. In addition, swimming is widely used in elementary schools, junior high schools, high schools, universities, and the general public, and there is a great demand for devices that can scientifically present swimming skills.
[0003]
As an apparatus for quantitatively measuring the movement in water, for example, a device using a pedometer is described in Japanese Utility Model Publication No. 6-70041 (Reference 1). In the underwater motion counter described in Document 1, it is detected that a repetitive motion in a repetitive motion in water has been performed, and the number of repetitive motions is measured. Further, the distance that the person under test swims is calculated from the number of repeated actions and the repeated action distance input in advance.
[0004]
In the swimmer goggles for electronic time measurement described in Japanese Patent Laid-Open No. 8-285967 (reference 2), the latest output value and the previous one of the output values of the accelerometer by the repeated operation of the swimmer Are compared with each other by the comparator, and the swimming state and the turn are identified, and the lap time and the total time which are the section records from one end of the pool to the other end are measured. Further, in the motion index measuring device described in Japanese Patent Laid-Open No. 10-290854 (Document 3), a change in acceleration with the lapse of time of repeated motion in repeated motion is detected by an acceleration sensor, and a signal from the acceleration sensor is detected. The number of repetitive operations per unit time (hereinafter referred to as pitch) is obtained by performing the FFT process. And speed is calculated | required using a pitch and repetition operation | movement distance. In the present specification, the “repetitive operation distance” means a distance traveled by a single repetitive operation.
[0005]
[Problems to be solved by the invention]
However, the apparatus described in each of the above-described documents has a problem that data such as a required time, a moving distance, or a speed cannot be measured in a unit for each repetitive motion in a repetitive motion. First, in the underwater motion counter described in Document 1, it is detected that a repetitive motion in a repetitive motion in water has been performed, and the number of repetitive motions is measured. However, only measurement of the number of times is performed, and time measurement cannot be performed. In addition, the distance that the subject swam is calculated from the number of repeated movements and the repetitive movement distances entered in advance, but the repeated movement distances used here are average values, and for each of the repeated movements Since it is not calculated | required, the distance which the to-be-measured person swam cannot be calculated correctly.
[0006]
In the swimmer goggles for electronic time measurement described in Document 2, the latest output value and the previous one output value among the accelerometer outputs by the swimmer's repetitive motion are compared by the comparator, so that the swimming state And a turn are identified, and a lap time and a total time, which are section records from one end of the pool to the other end, are measured. However, the time cannot be measured in units of repeated operations only by measuring the time in a predetermined section. Further, in the motion index measuring device described in Document 3, a change in acceleration with the lapse of time of repetitive motion in repetitive motion is detected by an acceleration sensor, and a pitch is obtained by performing FFT processing on a signal from the acceleration sensor. Yes. However, the pitch obtained here is an average value in a predetermined section, and it is not possible to obtain a repetitive operation time in units of repetitive operations. In addition, the speed is calculated using the pitch and the repetitive operation distance, but the repetitive operation distance used here is an average value and is not calculated for each of the repetitive operations. I can't ask for it. In the present specification, “repetitive operation time” means the time required for one repetitive operation.
[0007]
The present invention has been made to solve the above problems, and is an electronic measurement capable of measuring data such as required time, moving distance, or speed in units of repetitive motions in repetitive motion. The purpose is to provide equipment.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, an electronic measuring device according to the present invention is an electronic measuring device for measuring a swimming movement of a measurement person over a predetermined distance in a pool, and the repetitive movement of the measurement person's swimming repeated operation and detects that it has been made, and repeat the operation detecting sensor for outputting a detection signal the detected repetitive operation notifies each time it was made, based on the detection signal outputted from the repeated motion detection sensor in Each of the repetitive operations includes a repetitive operation time calculating means for calculating a repetitive operation time using a time required for one repetitive operation as a repetitive operation time.
[0009]
According to the electronic measuring device having the above configuration, by repeating the operation detection sensor, along with it is detected that the repetitive operation in the repetitive motion of the swimming of the subject is performed, each time the detected repetitive operation is performed A detection signal for notifying is output. Then, the repetitive operation time calculation means calculates the time required for one repetitive operation for each repetitive operation time based on the detection signal output from the repetitive operation detection sensor.
[0010]
Furthermore, the electronic measuring device according to the present invention is based on the data of the repetitive operation time calculated by the repetitive operation time calculation unit, and for each repetitive operation, a data calculation unit that calculates the distance traveled for each repetitive operation, It further comprises display means for displaying the distance traveled for each repetitive motion calculated by the data calculating means. The data calculation unit, assuming the velocity of each single repetitive operation of swimming of the subject is constant, that to calculate the distance traveled for each single repetitive operation of swimming of the subject.
[0011]
The inventor of the present application has found that there is a certain relationship between the repetitive operation time and the repetitive operation distance in the repetitive motion in the repetitive motion. If this relationship is used, the repeated operation distance is calculated for each of the repeated operations based on the repeated operation time calculated by the repeated operation time calculation unit by the data calculation unit, so that the repeated operation distance is accurately calculated. Then, the speed is accurately calculated by calculating an accurate repeated operation distance. Further, the display means displays information on the distance or speed that the repetitive operation proceeds once.
[0012]
Furthermore, the electronic measuring instrument according to the present invention is a time required for jumping or turning a repetitive operation time exceeding a predetermined threshold based on the repetitive operation time data calculated by the repetitive operation time calculating unit by the data calculating unit. The predetermined threshold value is determined based on the time required for the dive or the turn by using the relationship between the distance traveled by the dive or the turn measured in advance and the time required for the dive or the turn. The distance traveled in the repeated repetitive operation time is obtained as the distance traveled by diving or turning, and the obtained distance is subtracted from the total moving distance (that is, the predetermined distance), and each repetitive motion is repeated once for each repetitive motion. The traveling distance is calculated.
[0013]
In the calculation of the repetitive operation distance or speed, the data calculation unit normally removes the repetitive operation time data exceeding a predetermined threshold based on the repetitive operation time data calculated by the repetitive operation time calculation unit. Only the repetitive operation related to the repetitive operation is selected. In addition, the distance traveled in the repetitive operation time exceeding the predetermined threshold is subtracted from the total travel distance, so that only the travel distance related to the normal repetitive motion is obtained. As described above, the threshold is used for the repetitive operation time, so that the normal repetitive operation and the special repetitive operation are distinguished, and only the repetitive operation time related to the normal repetitive operation is selected. For each of these, the repeated operation distance or speed is calculated with high accuracy.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of an electronic measuring instrument according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.
[0015]
FIG. 1 is a block diagram showing a configuration of an embodiment of an electronic measuring instrument according to the present invention. The electronic measuring device 1 according to the present embodiment detects a time at which a repetitive motion is performed in a repetitive motion and outputs a detection signal for notifying the detection of the repetitive motion, and a repetitive motion time. A repetition operation time calculation unit 12 for calculating, a data calculation unit 13 for calculating either the repetition operation distance or the speed, and a display unit 14 for displaying either the repetition operation distance or the speed are provided.
[0016]
The repetitive motion detection sensor 11 detects each time when the repetitive motion in the repetitive motion is performed, and outputs a detection signal notifying the detection of the repetitive motion. The repetitive operation time calculation unit 12 calculates the time required for one repetitive operation for each repetitive operation based on the detection signal output from the repetitive operation detection sensor 11. The data calculation unit 13 removes the data of the repetitive operation time exceeding the predetermined threshold based on the data of the repetitive operation time calculated by the repetitive operation time calculation unit 12, and proceeds in the repetitive operation time exceeding the predetermined threshold. The distance is subtracted from the total moving distance, and for each of the repetitive actions, either the distance or the speed that travels in one repetitive action is calculated. The display unit 14 displays either the distance or speed that the repetitive operation calculated by the data calculation unit 13 proceeds in one time.
[0017]
Here, as the repeated motion detection sensor 11, for example, an acceleration sensor is preferably used. Further, an acceleration sensor may be attached to the headband of the swimming cap or goggles so that the time when the repeated operation is performed from the vertical movement of the head may be detected. Moreover, it is good also as detecting the time when repeated operation | movement was performed using the sensor which can detect landing as the repeated operation | movement detection sensor 11. FIG. It is also possible to take a picture of a swimmer with a video, etc., and to detect the time when the swimmer's head rose from the taken image as the time when the action was repeated, and to perform image processing etc. on the taken image The time when the repetitive operation is performed may be automatically detected.
[0018]
In the electronic measuring device 1, each time when the repetitive motion is performed in the repetitive motion is detected by the repetitive motion detection sensor 11, and a detection signal notifying the detection of the repetitive motion is output. Based on the detection signal output from the repetitive motion detection sensor 11, the repetitive motion time calculation unit 12 calculates the time required for one repetitive motion for each repetitive motion. Then, the data calculating unit 13 removes the data of the repetitive operation time exceeding the predetermined threshold based on the data of the repetitive operation time calculated by the repetitive operation time calculating unit 12, and the repetitive operation time exceeding the predetermined threshold. The distance traveled at is subtracted from the total travel distance, and for each repetitive motion, either the distance traveled by the repetitive motion or the speed is calculated. Any one of the distance and speed calculated by the data calculation unit 13 in a single repetitive operation is displayed on the display unit 14.
[0019]
The effect of the electronic measuring device according to the present embodiment will be described. In the electronic measuring instrument 1 described above, each time when the repetitive motion is performed is detected by the repetitive motion detection sensor 11, and a detection signal for notifying the detection of the repetitive motion is output. The repetitive operation time calculation unit 12 can calculate the time required for one repetitive operation for each repetitive operation time based on the detection signal output from the repetitive operation detection sensor 11.
[0020]
If the relationship between the repetitive operation time and the repetitive operation distance is used, the data calculation unit 13 obtains the repetitive operation distance for each repetitive operation based on the repetitive operation time calculated by the repetitive operation time calculation unit 12. Therefore, the repeated operation distance is accurately calculated. Then, the speed is accurately calculated by calculating an accurate repeated operation distance. In addition, the display unit 14 displays information on the distance or speed that the repetitive operation proceeds once.
[0021]
In addition, the data calculation unit 13 removes the data of the repetitive operation time exceeding a predetermined threshold based on the data of the repetitive operation time calculated by the repetitive operation time calculation unit 12, thereby relating to the normal repetitive operation. Only repetitive actions are selected. In addition, the distance traveled in the repetitive operation time exceeding the predetermined threshold is subtracted from the total travel distance, so that only the travel distance related to the normal repetitive motion is obtained. As described above, the threshold is used for the repetitive operation time, so that the normal repetitive operation and the special repetitive operation are distinguished, and only the repetitive operation time related to the normal repetitive operation is selected. For each of these, the repeated operation distance or speed is calculated with high accuracy.
[0022]
Here, the calculation method of the repetitive operation time using the above-described electronic measuring device 1 will be specifically described taking swimming as an example. First, in order to detect a repetitive action in swimming, the time at which the repetitive action is performed is detected using the repetitive action detection sensor 11. Specifically, an acceleration sensor is used as the repetitive motion detection sensor 11, and the acceleration sensor is attached to the wrist so that the time when the repetitive motion is performed is detected from the movement of the arm in the vertical direction or the front-back direction. . Here, the time when the arm extends forward is detected from the acceleration waveform.
[0023]
FIG. 2 is a flowchart showing a flow of detecting the time when the repeated motion detection sensor 11 performs the repeated motion. First, an acceleration waveform corresponding to the repeated motion is output from the repeated motion detection sensor 11 (step S1). Examples of acceleration waveforms output from the repetitive motion detection sensor 11 are shown in FIGS. FIG. 3 is a graph showing an acceleration waveform when swimming in crawl, with the vertical axis representing acceleration and the horizontal axis representing time. FIG. 4 is a graph showing an acceleration waveform when swimming in breast (breaststroke), with the vertical axis representing acceleration and the horizontal axis representing time. Next, the acceleration waveform output from the repetitive motion detection sensor 11 is subjected to a high frequency removal filter process that removes a high frequency component and extracts a fundamental frequency component (step S2). Then, a minimum value or a maximum value in each cycle of the acceleration waveform is detected (step S3). Since the time when the minimum value or the maximum value detected in S3 corresponds to the time when the repetitive operation is performed, the time when the minimum value or the maximum value detected in S3 is detected is detected as the time when the repetitive operation is performed. (Step S4). Finally, a detection signal for notifying the detection of the repetitive operation is output (step S5). Based on the detection signal output from the repetitive motion detection sensor 11 in this manner, the repetitive motion time calculation unit 12 calculates a repetitive motion time for each repetitive motion.
[0024]
FIG. 5 is a graph showing a part of the result of detecting a repetitive motion when a 400 m individual medley competition is performed in a 50 m pool, where the vertical axis represents the repetitive motion time and the horizontal axis represents the number of repetitive motions. Further, the period T1 is a period in which the butterfly swims, the period T2 is the period in which it swims in the back (backstroke), the period T3 is in the period in which it swims in the breast, and the period T4 is the period in which it swims in the crawl. In the repetitive exercise in swimming, the repetitive operation time from when the turn is performed until the normal repetitive operation is detected is longer than the repetitive operation time by the normal repetitive operation. That is, in FIG. 5, the portion where the repetitive operation time becomes longer is due to the operation after the turn until the normal repetitive operation starts. The distance swam between the portion where the repetition operation time is long and the portion where the repetition operation time is long next is 50 m of the length of the pool.
[0025]
Further, it can be seen from FIG. 5 that the repetitive operation time varies depending on the event. Specifically, during the period T1 when swimming in the butterfly and the period T3 when swimming in the breast, both hands tend to move at the same time, so the operation time tends to be long. Since the arm is moved alternately left and right, the operation time tends to be shortened.
[0026]
Further, the calculation method of the repeated operation distance and speed will be specifically described. The data of the repetitive operation time calculated by the repetitive operation time calculation unit 12 is divided by the data calculation unit 13 into the data of the repetitive operation time for every 50 m of the pool length after the period of jump or turn is determined from the repetitive operation time. Is done. Here, for the determination of the dive or turn period, a determination method using a preset threshold is used. For example, in the case of swimming, depending on the event or the skill of the player, the repetitive operation time is about 2 to 2.5 seconds, and the time required for diving or turning is 3 to 4 seconds or more. From this fact, it is considered that at least the repetitive operation time is 3 seconds or more when jumping or turning. Therefore, as a specific threshold, it is preferable to set the threshold to 3 seconds. Alternatively, the threshold value may be set to a numerical value other than the above in consideration of other conditions. Thus, the repetitive operating distance is calculated from the data of the repetitive time divided for each pool length.
[0027]
The data calculation unit 13 can calculate the repetitive operation distance by using the relationship that the repetitive operation distance is substantially proportional to the repetitive operation time. That is, assuming that the pool length is D and the repeated operation time data string is st1, st2,..., Stn, the repeated operation distance can be calculated by internally dividing the pool length D using stn. . Specifically, if the integrated value of the time sequence is IS = Σ (stn), the repetitive operating distances d1, d2,..., Dn can be calculated by dn = D × (stn) / IS. However, the distance traveled by diving or turning must be subtracted from the pool length D. For the distance to jump or turn, measure the relationship between the distance to jump or turn and the time required for jump or turn, and then use this relationship to Based on the time until the repetitive motion starts, the distance traveled by jumping or turning can be obtained.
[0028]
FIG. 6 is a table showing the relationship between the time required for diving or turning and the distance traveled by diving or turning, and is obtained by averaging several trials. The time required for the dive or turn means the time required for the swimmer to start the normal repetitive motion after performing the dive or turn. The distance traveled by diving or turning means the distance traveled by the swimmer after starting the diving or turning until the start of the normal repetitive motion. In Brest, it is possible to perform one stroke or one underwater, but this is different from the normal repetitive motion, so it is included in the turn period. Further, in the back and butterfly, it is possible to move in the water with a bassaro (a technique of using a dolphin kick while diving after a start or turn), and the number of repeated operations and the moving distance during that time are considerably different. Therefore, the number of repeated movements and movement distances while moving underwater in Basaro are separately measured, and the accuracy of calculating the repeated movement distances is corrected by using this to correct the repeated movement distance while moving underwater in Basaro. Can be raised. Furthermore, in order to improve the accuracy of calculating the repetitive movement distance, the movement distance corresponding to the repetitive movement is obtained by performing image processing on the image captured by the video, and the movement distance thus obtained is used. May be.
[0029]
FIG. 7 is a graph showing the result of calculating the repetitive movement distance when reciprocating 50 m with a breast in a 400 m individual medley competition, where the vertical axis represents the repetitive movement distance and the horizontal axis represents the number of repetitive movements. In addition, A1 indicates the repetitive operating distance on the forward path, and A2 indicates the repetitive operating distance on the return path. It can be seen from FIG. 7 that the repeated operation distance can be calculated for each repeated operation.
[0030]
The technique used in the present invention is based on the time required for one repetitive motion in a repetitive exercise, and can be applied not only to swimming but also to other sports. Moreover, the electronic measuring instrument according to the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the electronic measurement device according to the present invention may be configured to be separated into a repetitive motion detection device and a data calculation device. Here, the repetitive motion detection device has a function of detecting a time at which a repetitive motion is performed, a function of recording a time at which the detected repetitive motion is performed, and a function of outputting recorded data. . In addition, the data calculation device has a function of calculating the repeated operation time based on the data output from the repeated motion detection device, a function of calculating the repeated operation distance or speed, and a function of displaying the repeated operation distance or speed. Shall have.
[0031]
Furthermore, it is also possible to calculate energy consumption from data such as repeated operation time or repeated operation distance calculated by the electronic measuring instrument according to the present invention. By calculating energy consumption, as an objective information of lifestyle habits, not only for health management such as dieting, but also to grasp the amount of exercise for diabetics, or to grasp the amount of exercise for athletes Application is possible.
[0032]
【The invention's effect】
As described above in detail, according to the electronic measuring instrument of the present invention, each time when the repetitive motion is performed in the repetitive motion is detected by the repetitive motion detection sensor, and the detection of the repetitive motion is notified. A detection signal is output. Then, the repetitive operation time calculating means can calculate the time required for one repetitive operation for each repetitive operation time based on the detection signal output from the repetitive operation detection sensor.
[0033]
If the relationship between the repetitive operation time and the repetitive operation distance is used, the repetitive operation distance is obtained for each of the repetitive operations based on the repetitive operation time calculated by the repetitive operation time calculation unit by the data calculation unit. The repeated operating distance is accurately calculated. Then, the speed is accurately calculated by calculating an accurate repeated operation distance. In addition, the display means displays information on the distance or speed that the repetitive operation proceeds once.
[0034]
In the calculation of the repetitive operation distance or speed, the data calculation unit removes the repetitive operation time data exceeding a predetermined threshold based on the repetitive operation time data calculated by the repetitive operation time calculation unit. Only the repetitive operation related to the normal repetitive operation is selected. In addition, the distance traveled in the repetitive operation time exceeding the predetermined threshold is subtracted from the total travel distance, so that only the travel distance related to the normal repetitive motion is obtained. As described above, the threshold is used for the repetitive operation time, so that the normal repetitive operation and the special repetitive operation are distinguished, and only the repetitive operation time related to the normal repetitive operation is selected. For each of these, the repeated operation distance or speed is calculated with high accuracy.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of an electronic measuring instrument according to the present invention.
FIG. 2 is a flowchart showing a flow of detecting a time when a repetitive operation is performed.
FIG. 3 is a graph showing an acceleration waveform when swimming in a crawl.
FIG. 4 is a graph showing an acceleration waveform when swimming in a breast.
FIG. 5 is a graph showing a part of a result of detecting a repetitive motion when a 400 m individual medley is played in a 50 m pool.
FIG. 6 is a table showing the relationship between the time required for a dive or turn and the distance traveled by the dive or turn.
FIG. 7 is a graph showing the result of calculating the repetitive operating distance when reciprocating 50 m with a breast in a competition of 400 m individual medley.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Electronic measuring device, 11 ... Repeating motion detection sensor, 12 ... Repeating operation time calculation part, 13 ... Data calculation part, 14 ... Display part.

Claims (2)

An electronic measuring device that measures the swimming movement of a person to be measured over a predetermined distance in a pool,
A repetitive motion detection sensor for detecting that a repetitive motion in the repetitive motion of the measurement subject has been performed, and outputting a detection signal for notifying each time when the detected repetitive motion is performed,
Based on the detection signal output from the repetitive motion detection sensor, for each of the repetitive motions, a repetitive motion time calculation means for calculating the repetitive motion time, with a time required for one repetitive motion as a repetitive motion time,
Based on the data of the repetitive operation time calculated by the repetitive operation time calculation means, data calculation means for calculating the distance traveled for each repetitive operation for each of the repetitive operations;
Display means for displaying a distance traveled for each of the repeated operations calculated by the data calculating means;
With
The data calculation means includes
Based on the data of the repetitive operation time calculated by the repetitive operation time calculating means, the repetitive operation time exceeding a predetermined threshold is taken as the time required for jumping or turning, and the data on the operation time is excluded.
Based on the time required for the dive or the turn , the distance traveled in the repetitive operation time exceeding the predetermined threshold is calculated based on the time required for the dive or the turn by using the relationship between the distance traveled by the diving or the turn measured in advance . Calculate as the distance to dive or turn, subtract the determined distance from the predetermined distance,
For each of the repetitive actions, calculate the distance traveled for each repetitive action,
An electronic measuring instrument characterized by that.   The data calculation means calculates the distance traveled by each repetition of the measurement subject's swimming, assuming that the speed of each repetition of the measurement subject's swimming is constant. The electronic measuring instrument according to claim 1.

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