WO2002077653A1 - Dispositif de mesure mobile - Google Patents

Dispositif de mesure mobile Download PDF

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Publication number
WO2002077653A1
WO2002077653A1 PCT/JP2002/001971 JP0201971W WO02077653A1 WO 2002077653 A1 WO2002077653 A1 WO 2002077653A1 JP 0201971 W JP0201971 W JP 0201971W WO 02077653 A1 WO02077653 A1 WO 02077653A1
Authority
WO
WIPO (PCT)
Prior art keywords
swimmer
movement
measuring device
photographing
moving speed
Prior art date
Application number
PCT/JP2002/001971
Other languages
English (en)
Japanese (ja)
Inventor
Takehiro Kurono
Yuuichi Kimura
Takahiro Murakoshi
Original Assignee
Hamamatsu Photonics K.K.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hamamatsu Photonics K.K. filed Critical Hamamatsu Photonics K.K.
Publication of WO2002077653A1 publication Critical patent/WO2002077653A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
    • A63B24/0003—Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • G01P3/38—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light using photographic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/20—Analysis of motion
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2220/00—Measuring of physical parameters relating to sporting activity
    • A63B2220/80—Special sensors, transducers or devices therefor
    • A63B2220/807—Photo cameras
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/12—Arrangements in swimming pools for teaching swimming or for training

Definitions

  • This effort relates to a movement measurement device that measures the movement of swimmers swimming in a pool.
  • a training pool comprising: swimming state detecting means for detecting the movement of a swimmer based on a video signal of the means; display means for displaying a movement of the swimmer on a screen; and instruction transmitting means for giving a training instruction to a swimming swimmer. It has been known.
  • the present invention has been made in order to solve such a problem, and an object of the present invention is to provide a movement measuring device capable of accurately measuring a moving speed of a swimmer. You.
  • the movement measuring device is configured to include: a photographing means for photographing a pool in which a swimmer swims from directly above; and a computing means for computing a moving speed of the swimmer based on a photographed image of the photographing means.
  • directly above means including almost directly above.
  • the movement measuring device is characterized in that the pool photographed by the photographing means is a pool without running water.
  • the “pool without running water” means a normal pool that is not a training pool for flowing water in a certain direction.
  • the arithmetic means captures a photographed image constituting a photographed image of the photographing means at regular time intervals, and calculates a moving speed based on a moving amount of a specific part of the swimmer on the photographed image. The operation is performed.
  • the moving speed of the swimmer can be calculated based on the photographed image of the swimmer, the moving speed data can be immediately provided to the swimmer. For this reason, the swimmer can know the measurement result during or after swimming and while the kinesthetic feeling remains, and can perform effective swimming practice. '
  • a plurality of the above-mentioned photographing means are installed along a swimmer's swimming direction, and a picture selecting means which selects a photographed picture in which the swimmer is photographed and sets the photographed picture as a calculation target picture of the calculating means. It is characterized by having. Further, the movement measuring device according to the present invention is characterized in that the photographing range is set such that the photographing means has an area partially overlapping with the photographing range of the adjacent photographing means.
  • the swimmer by installing a plurality of photographing means along the swimmer's swimming direction, the swimmer can sequentially photograph the swimmer by the plurality of photographing means even if the swimmer advances. Therefore, it is possible to continuously measure the moving speed of the swimmer following the movement of the swimmer. In addition, the moving speed of the swimmer can be continuously measured without moving the photographing means, and the device can be manufactured at low cost.
  • the movement measuring device is characterized in that the calculating means calculates the moving speed of the swimmer based on the movement of a plurality of specific parts of the swimmer photographed by the photographing means.
  • the above-mentioned computing means selects a specific part that is clearly displayed in the captured image from the plurality of specific parts, and determines the moving speed of the swimmer based on the movement of the selected specific part. The operation is performed.
  • the movement of the swimmer based on another specific part can be performed.
  • the speed can be calculated in an interpolation manner. For this reason, the moving speed of the swimmer can be continuously calculated without interruption. .
  • the movement measuring device is characterized in that the calculation means detects a unique stroke pattern of the swimmer and estimates the movement of the specific part of the swimmer. According to the present invention, continuous measurement data can be obtained even when a specific part is not clearly displayed for a predetermined time in a captured video.
  • the movement measuring device includes a marker attached to a specific part of a swimmer. Further, the movement measuring device according to the present invention includes a band attached to a specific part of a swimmer.
  • FIG. 1 is a configuration diagram of the movement measuring device according to the first embodiment of the present invention.
  • FIG. 2 is an explanatory diagram of the movement measuring device of FIG.
  • FIG. 3 is an explanatory diagram of the movement measuring device of FIG.
  • FIG. 4 is an explanatory diagram of a swimming cap in the movement measuring device of FIG.
  • FIG. 5 is an explanatory diagram of a measurement target in the mobile measurement device of FIG.
  • FIG. 6 is an explanatory diagram of a measurement target in the mobile measurement device of FIG.
  • FIG. 7 is a diagram showing movement measurement data obtained by the movement measurement device of FIG.
  • 8A and 8B are explanatory diagrams of the movement measurement error.
  • FIG. 9 is a diagram showing stroke data in the movement measuring device of FIG.
  • FIG. 10 is a diagram showing stroke data in the movement measuring device of FIG.
  • FIG. 11 is an explanatory diagram of a moving speed estimation in the movement measuring device of FIG.
  • FIG. 12 is an explanatory diagram of stroke time estimation in the movement measuring device of FIG.
  • FIG. 13 is an explanatory diagram of time prediction in the movement measuring device of FIG.
  • FIG. 14 is a configuration diagram of the movement measurement device according to the second embodiment.
  • FIG. 15 is an explanatory view of the movement measuring device according to the third embodiment.
  • FIG. 1 shows a configuration diagram of the movement measuring device according to the present embodiment
  • FIGS. 2 and 3 show layout diagrams of cameras used in the moving measuring device according to the present embodiment.
  • a movement measuring device 1 is a device that measures a moving speed of a swimmer who swims in a pool, and includes a plurality of cameras 2.
  • the camera 2 is a photographing means for photographing a bull in which a swimmer swims. For example, a CCD camera or the like is used.
  • a video switch 3 is connected to the output side of each camera 2.
  • the video switch 3 functions as a video selecting means for appropriately selecting the output signals of the plurality of cameras 2 and calculating a moving speed or the like.
  • the video switch 3 and each camera 2 are connected to a camera control unit 4.
  • the camera control unit 4 controls operations of the camera 2 and the video switch 3, and is mainly configured by a computer including, for example, a CPU, a ROM, and a RAM.
  • Various control routines including a camera operation routine and a video switch operation routine are stored in the ROM.
  • each camera 2 operates according to the operation control signal of the camera control unit 4 to perform photographing.
  • the video signal output from the camera 2 is input to the video switch 3, and is appropriately switched according to the switching control signal of the camera control unit 4 and output from the video switch 3. For example, when eight cameras 2 are installed as shown in Fig. 1, the video signals of two cameras 2 are selected and output.
  • the position detectors 5 and 5 are connected to the output side of the video switch 3.
  • the position detector 5 detects the position of the swimmer based on the captured image output from the video switch 3.
  • two position detection units 5 are installed and perform position detection on two courses of the pool.
  • the display unit 7 is a display means for displaying a result such as a moving speed of a swimmer, and for example, a CRT or a liquid crystal monitor is used.
  • the integrated control unit 8 calculates continuous moving distance data based on the position data output from the position detecting unit 5, calculates the moving distance of the swimmer, stroke data, and the like, and functions as a calculating means.
  • the integrated control unit 8 includes, for example, a CPU, a R ⁇ M, It is composed mainly of computers including RAM.
  • the ROM stores various control routines including an arithmetic routine.
  • the data calculated by the integrated control unit 8 is output to the display unit 7 and displayed on the display unit 7.
  • the camera 2 is installed above the pool 10 where the swimsuit 9 swims, and can shoot the pool 10 from directly above.
  • directly above means including almost directly above.
  • the shooting direction of camera 2 is directed downward and the swimmer is included in the shooting range, or when the shooting direction is tilted several degrees to several 10 degrees from the vertical, the swimmer is shot here. This corresponds to "photographing from directly above”.
  • Pool 2 is a swimming pool without running water.
  • the “pool without running water” means a normal pool that is not a training pool for flowing water in a certain direction.
  • Camera 2 is arranged along the direction in which swimmer 9 swims in pool 10.
  • the shooting range of the camera 2 is set so as to have an area that partially overlaps the shooting range of the adjacent camera 2. For example, if the length L of the pool 10 is 50 m and the shooting range width W of the camera 2 is about 8 m, the installation interval D of the camera 2 is 7 m, and the camera 2 They are arranged sequentially along the direction. In this case, the overlapping shooting area S of the adjacent cameras 2 is about 0.5 m.
  • FIG. 3 is a plan view when the pool 10 is viewed from above.
  • the camera 2 is installed above the position between the courses 11 and 11 of the pool 10.
  • the shooting range of the camera 2 is set so that both of the two courses 11 can be shot simultaneously.
  • the shooting range can be increased every two courses.
  • a marker or the like as a measurement target is attached to a specific part of the swimmer 9.
  • a marker 13 is attached to a swimming cap 12 worn by a swimmer 9.
  • Markers 1 3 are swimmer 9 swimming Sometimes attached to the front or back of the swimming cap 12 for easy viewing from above.
  • the position of the specific part can be easily grasped when the swimmer 9 is photographed, and the calculation of the moving speed of the swimmer 9 becomes easy. Also, if the marker 13 is formed small, the accuracy of measuring the moving speed can be improved.
  • annular band 14 may be formed at the edge of the swimming cap 12. It is desirable that the band 14 be a color different from the main body of the swimming cap 12, a color complementary to the color of water, or a black color having a large contrast difference.
  • the edge portion 14a of the band 14 is used as a measurement target.
  • a belt for a measurement target may be attached to a portion other than the swimming cap 12.
  • a belt 15 is attached to a swimmer's 9 arm.
  • a belt 16 is attached to the chest of swimmer 9.
  • These belts 15 and 16 may be formed as an annular body and worn directly on the swimmer 9, or may be sewn or colored on the surface of the swimmer 9 of the swimmer 9. Further, it is desirable that these belts 15 and 16 be a color having a complementary color relationship with the color of water or a black color having a large contrast difference so as to be easily detected in the movement measurement.
  • markers 17 and 17 may be attached to the rear part of the swimmer's 9 shoulder as a measurement target.
  • the peripheral portion 18 of the marker 17 black or a color complementary to the marker 17 so that the marker 17 can be easily detected.
  • the measurement targets for the movement of swimmer 9 are: head 19, marker 13, node edge 14a, cap edge 12a, head rear 20, belt edge 16a, pants edge 2 1 or marker 17 can be used. This measurement target is appropriately selected and used for each swimming method.
  • breaststroke breaststroke
  • a butterfly 1 to 5 of the top of the head 19, the belt edge 16a, the pants edge 20 and the marker 17 are selected as measurement targets for a specific part.
  • each measurement target it is desirable to set the positional relationship of each measurement target as data in advance. In this case, it is desirable to set for each swimmer 9. For example, if the positional relationship or distance between the upper part 19, the rear part 20, the belt edge 16a, and the pants edge 21 is input to the position detector 5 and set in advance, Even if one of the measurement targets cannot be directly detected, it can be calculated from the position of another measurement target.
  • the edge target such as the band edge 14a, the 'cap edge 12a, the belt edge 16a or the pants edge 21' as the measurement target, the entire node 14, the entire swimming cap 12, Accurate position detection is possible as compared to the case where the entire benolet 16 or the entire pants 21a is used as the measurement target.
  • the position of the swimming cap 12 is generally detected by binarizing each pixel data constituting the swimming cap 12 by color and brightness to obtain the center of gravity.
  • the swimmer 9 rotates his head, twists, and moves up and down, and the splash shape of the swimming cap 12 is lost. Therefore, the accuracy of detecting the center of gravity of the swimming cap 12 is significantly reduced.
  • the edge portion when measuring the edge portion, if the edge portion is displayed, the position can be accurately detected even when the entire swimming cap 12 cannot be seen due to water splashes or the like.
  • the swimmer 9 swims is set in the position detection unit 5, and the marker 17 and the belt 16 are set. Enter the position data of which measurement target.
  • the swimmer 9 is made to swim in the pool 10, and the swim of the swimmer 9 is photographed with the force camera 2. At this time, camera 2 shoots swimmer 9 from directly above,
  • the position of the swimmer 9 for each unit time can be accurately grasped based on the captured video, and the moving speed of the swimmer 9 can be continuously measured.
  • the captured image of each camera 2 is input to the video switch 3.
  • the video switch 3 receives the control signal of the force camera control unit 4, selects two of the video images captured by each camera 2, and outputs the selected video to the position detection units 5 and 5.
  • the photographed image in which the swimmer 9 exists within the photographing range and the photographed image of the camera 2 adjacent thereto are selected as the photographed images.
  • the video switch 3 receives a control signal from the camera control unit 4 and performs selection switching as a photographed image to be output to the position detection units 5 and 5 by photographing the swimmer 9.
  • the shooting range of the camera 2 is set to have an area S partially overlapping the shooting range of the adjacent camera 2, even if the swimmer 9 swims, the plurality of cameras 2 sequentially shoot the swimmer 9 it can. For this reason, it is possible to follow the movement of the swimmer 9 and continuously measure the movement speed of the swimmer 9.
  • the switching of the captured video in the video switch 3 is performed using a blanking period of a video signal (video signal).
  • the position detection unit 5 detects the position of the swimmer 9 based on the captured video output from the video switch 3.
  • This position detection of the swimmer 9 composes the shot image. This is performed by detecting the position of the measurement target of the swimmer 9 displayed in the captured image to be formed. Specifically, coordinate data of a measurement target in a captured image may be detected and output as position data.
  • the swimming style is butterfly, as shown in Fig. 6, two measurement targets are set: the upper part 19 and the pants edge 21.
  • a detection area 31 including the upper part 19 and a detection area 32 including the pants edge 21 are set, and the positions of the upper head 19 and the pants edge 21 are detected in the detection areas 31 and 32, respectively.
  • the position data of the swimmer 9 is determined based on each position data. It is desirable that the determination of the position data of the swimmer 9 be performed on the captured image of each frame constituting the captured video. In this case, since the position data for each short time can be obtained, the measurement accuracy of the moving speed of the swimmer 9 can be improved.
  • the determination of the position data may be performed, for example, on captured images every several frames in consideration of the image processing capability of the position detection unit 5. Also, in position detection using a plurality of measurement targets, if either the position of the head 19 or the position of the pants edge 21 cannot be detected, the position of the swimmer 9 is determined using the other position data. I do. In the case of Batafurai, the upper body is submerged in the water for half of the stroke, and the lower body is submerged in the other half of the stroke.
  • the position data of the swimmer 9 is determined based on the position of the pants edge 21 during the period in which the upper body dives underwater, and the position data of the swimmer is determined based on the position of the upper head 19 during the period in which the lower body dives. I do.
  • the position data of the swimmer 9 is interpolated based on the position data of the other part.
  • the position of the swimmer 9 can be reliably detected. And shown in Figure 7 As described above, the moving speed of the swimmer 9 can be continuously detected without interruption based on the interpolated position data.
  • a cap wedge 12a (see Fig. 5) is set as the measurement target. It is also desirable to set markers 17 and 17 on both shoulders as measurement targets.
  • the left and right markers 17 and 17 alternately rise above the surface of the water as the arm rotates, so the position data of swimmer 9 is interpolated based on the position of the rising marker 17 This makes it possible to reliably detect the position of the swimmer 9 even if the cap wedges 12a are not clearly displayed due to water splashes and the like, thereby improving the detection accuracy.
  • the top of the head 19 is set as the measurement target and set the pan edge 21 or the belt edge 16a.
  • the position of swimmer 9 is determined based on the position data of the upper head 19 during the period in which the lower body dives in the stroke during one stroke, and the pan- The position of the swimmer 9 is determined based on the position data of 1 or the belt edge 16a. In this way, by interpolating with the position data of a plurality of measurement targets, the position of the swim 9 can be reliably detected, and the detection accuracy can be improved.
  • the cap edge 12a As the measurement target, it is desirable to set the cap edge 12a as the measurement target, and to set the hair of the swimmer 9 and the wedge of the forehead.
  • the position of the swimmer 9 is determined based on the position data of the cap wedges 12a, and interception is performed using the position data of the hair and the edge of the forehead. As a result, the position of the swimmer 9 can be reliably detected, and the detection accuracy can be improved.
  • the photographing direction is different, which may cause an error in the position detection of the swimmer 9. There is. Therefore, according to the position of the swimmer 9 captured by the camera 2, By correcting the position data and correcting the position data, accurate position detection of the swimmer 9 becomes possible.
  • the swimmer 9 In the position detection of the swimmer 9 by the position detection unit 5, when the swimmer 9 swims in a breast, the swimmer 9 raises his body for breathing, which may cause an error in the position of the measurement target.
  • the swimmer 9 is detected when the position data is switched. An error occurs in the position, and the moving speed becomes inaccurate.
  • the movement error of the individual swimmer 9 due to the swimming motion be patterned in advance and the error correction be performed using the movement error data.
  • error correction By such error correction, measurement accuracy of the position and the moving speed of the swimmer 9 can be improved. Note that such an error is effective not only in the case of delay but also in the case of ball fly.
  • data relating to the position of the swimmer 9 is output from the position detection unit 5, and is input to the camera control unit 4, the display unit 7, and the integrated control unit 8 via the switch hap 6.
  • the position data of the swimmer 9 is input every unit time, for example, every 1/30 second.
  • the integrated control unit 8 converts the sequentially input position data into continuous position movement data and calculates the moving speed of the swimmer 9. Then, the moving speed per unit time is calculated, and a graph of the time change of the moving speed is created as shown in FIG. In this graph, the moving speed changes periodically. This one cycle represents the change in moving speed for one stroke. This graph is displayed on the display unit 7.
  • the integrated control unit 8 calculates a stroke time and a stroke distance for each stroke, and creates a graph representing a change in the stroke time and the stroke distance with respect to the number of strokes.
  • the stroke time is the time required for one stroke.
  • the stroke distance is the distance traveled in one stroke. This graph is also displayed on the display unit 7 as appropriate.
  • the moving speed of the swimmer 9 is calculated based on the captured image of the swimmer 9, and the moving speed data can be provided to the swimmer 9 immediately. Therefore, the swimmer 9 can know the measurement result during or after swimming and while the kinesthetic feeling remains, and can perform effective swimming practice.
  • the integrated control unit 8 can simultaneously display both the target stroke pattern and the stroke pattern of the swimmer 9 who is currently swimming. Further, the difference patterns of the two can be displayed simultaneously. By creating a target stroke pattern for the swimmer 9 to achieve the target time, it is possible to practice closer to this, and effective practice is possible.
  • an instruction means such as a speaker for transmitting a voice or a signal sound into the water of the pool 10 and giving a practice instruction to the swimmer 9 during swimming.
  • the instruction means emits different underwater sounds when the target value has been reached and when the target value has not been reached, and informs the swimmer 9 of the current stroke state.
  • the swimmer 9 can know in real time whether or not his or her swimming is good or bad, and can learn the best swimming state by trial and error. This realizes a biofeedback function for swimming, and is an effective swim training that links the senses and data of swimmer 9 as a swimmer.
  • the stroke time (stroke cycle) of swimmer 9 is The measurement is easy because the movement speed changes greatly periodically. In the case of crawling / crawling, it is difficult to measure the stroke time because the left and right arms are rotated alternately. Therefore, an area for detecting whether or not the arm of the swimmer 9 has reached a specific position, for example, a position next to the head, is set, and it is determined that the arm has passed that area, and the stroke time is determined. Can be. Specifically, the luminance in the area is monitored, and it is detected that the color in the area has changed to the color of the arm. In this case, the left and right stroke times can be obtained separately. Note that the stroke time may be obtained by using the belt 15 worn on the arm as a measurement target.
  • the integrated control unit 8 can estimate the target position and make it possible to detect the measurement target again. Further, by detecting or presetting a stroke pattern for each individual swimmer 9, and comparing the stroke pattern with the stroke pattern, it is possible to improve the detection accuracy of estimating the movement position.
  • the moving speed of the swimmer 9 changes for each stroke. Therefore, the next movement position can be estimated using the stroke time (stroke cycle). In other words, by using this estimation function, the next moving position can be obtained even if the measurement target is lost. Also, the final arrival time can be predicted by estimating the time change curve of the measured data and the stroke waveform.
  • the size of the target detection area must be set to be longer than the distance the measurement target moves in one frame time so that the target can be detected in the next frame even if the measurement target is lost. If this is the case, detection can be easily continued.
  • the stroke time and stroke distance data for each stroke shown in FIG. 9 are stored for each of the nine swimmers and managed together with other physical data. The last arrival time can be estimated by using the past pattern and pattern in the swim pattern from now on, following the actual measurement data of swimmer 9 swimming. '
  • Figure 11 shows the measured data for the stroke pattern of swimmer 9 as a solid line.
  • the measurement data is indicated by a broken line.
  • the inferred data is displayed using the swimmer's 9 past stroke patterns.
  • FIG. 12 shows the measured data of the change in the stroke time of the swimmer 9 by a solid line, and the predicted data by a broken line.
  • FIG. 13 shows the relationship between the time and the distance when the swimmer 9 swims a predetermined distance (for example, 100 m).
  • the solid line indicates measured data
  • the broken line indicates predicted data.
  • the arrival time changes sequentially according to the value of the measured data.
  • the prediction time can be set to a range with respect to the past highest value to indicate the width of the prediction time.
  • the movement measurement device by shooting the pool 10 in which the swimmer 9 swims from directly above, the measurement target can be measured by the rotation of the swimmer 9's arm and the accompanying water droplets and bubbles. It is possible to prevent the part of the swimmer 9 to be hidden. Therefore, the position of the swimmer 9 for each unit time can be accurately grasped based on the photographed video, and the moving speed of the swimmer 9 can be continuously measured. In addition, it is easy to measure the moving speed of the swimmer 9 for each stroke and the change in the moving speed during each stroke.
  • the captured image constituting the video captured by the camera 2 is captured at regular intervals, and the travel speed is calculated based on the travel distance of the swimmer 9 in the specific position on the captured image, whereby the travel speed data is immediately obtained.
  • the swimmer 9 can know the measurement result during swimming or while there is a kinetic sensation under the swimming rhythm, and can perform effective swimming practice.
  • the swimmers 9 can sequentially photograph the swimmer even if swimmer 9 proceeds. Therefore, it is possible to follow the movement of the swimmer 9 and continuously measure the movement speed of the swimmer 9. In this case, the moving speed of the swimmer 9 can be continuously measured without moving the camera 2, and the device 1 can be manufactured at low cost.
  • the position of the specific part in the captured image can be easily grasped and calculated, and the movement speed of the swimmer 9 can be easily calculated.
  • the markers 13 attached to a specific part are formed small, the accuracy of measurement of the moving speed can be improved.
  • the movement measuring apparatus In the movement measuring apparatus according to the present embodiment, a description has been given of an apparatus in which a swimmer 9 is photographed by a force camera 2 provided above a pool 10 as photographing means and movement is measured based on the photographed image.
  • the movement measuring device according to the above is not limited to such a device, and performs movement measurement based not only on the image taken by the camera 2 above the pool 10 but also on the image taken by the underwater camera 15. You may. In this case, more accurate movement measurement can be performed.
  • the mobile measurement device uses the camera 2 that is movable.
  • FIG. 14 shows a configuration diagram of the movement measuring device according to the present embodiment.
  • the movement measuring device 1a according to the present embodiment includes a moving unit 40, a base unit 50, and a control unit 60.
  • the moving section 40 is slidably mounted on a rail 41 provided above the pool 10 and is movable along the rail 41.
  • Rail 4 1 Swimer 9 Swim It is installed in parallel with the course.
  • the camera 2 is installed in the moving section 40. The camera 2 moves with the movement of the moving unit 40. The image captured by the camera 2 is input to the transmission unit 43 via the encoder 42.
  • the moving unit 40 is provided with a motor 44 serving as a moving power source of the moving unit 40.
  • the motor 44 receives a control signal output from the communication unit 46 via the selector 45 and drives according to the control signal.
  • the moving section 40 is provided with a light emitting section 47 and a light receiving section 48.
  • the light-emitting unit 47 is a light-projecting unit that emits light toward the lower bounolle 10, and includes, for example, an LED as a light-emitting element.
  • the light receiving unit 48 is a light receiving unit that receives the light reflected by the swimmer 9 out of the light emitted by the light emitting unit 47, and includes, for example, a PSD (Position Sensitive Device) as a light receiving element.
  • the swimmer 9 has a light emitting section
  • a reflection plate 49 is provided in the moving section 40.
  • the reflection plate 49 functions as a reflection unit that reflects the pulse light emitted from the distance measuring unit 51 installed in the base unit 50 toward the distance measuring unit 51.
  • the base 50 is installed near the end of the rail 41.
  • the base unit 50 is provided with a receiving unit 52.
  • the receiving unit 52 is a receiving unit that receives an optical signal emitted from the transmitting unit 43 of the moving unit 40.
  • This optical signal is a signal related to the image captured by the camera 2, and for example, a signal obtained by modulating light having a wavelength of 980 nm is used.
  • the optical signal input to 52 ' is converted into an electric signal, input to the decoder 53, and then input to the image processing unit 61 of the control unit 60.
  • a communication unit 54 is installed in the base unit 50.
  • the communication section 54 communicates with the communication section 46 of the moving section 40, and can mutually transmit and receive signals by optical communication. This optical communication is performed, for example, by transmitting and receiving a serial signal.
  • the transmission signal of the base unit 50 is, for example, a drive control signal of the motor 44, a light emitting unit 47 Motion control signal.
  • the reception signal of the base unit 50 is, for example, an output signal of the light receiving unit 48 or the like.
  • As the optical signal in the communication units 54 and 46 for example, light having a wavelength of 910 nm is used.
  • the communication unit 54 of the base unit 50 transmits and receives various signals to and from the control unit 60 via the RS-LAN 55 and the switcher hub 56.
  • the distance measuring section 51 is a distance measuring means for measuring a distance from the base section 50 to the moving section 40. That is, the distance measuring unit 51 emits a pulse light toward the reflector 49 of the moving unit 40, receives the reflected light reflected by the reflector 49, and sets the distance based on the time from emission to reception. Perform measurement. The distance data calculated by the distance measuring section 51 is transmitted to the processing personal computer 62 of the control section 60 via the RS-LAN 57 and the switch chinda hub 56.
  • the control unit 60 controls the moving speed of the moving unit 40, displays the image captured by the camera 2, performs image processing, and the like.
  • the processing personal computer 62 inputs the distance data calculated by the distance measuring unit 51, constantly samples the distance data at about 10 kHz, and calculates the moving speed of the moving unit 40. . Then, an appropriate speed signal is output to the moving unit 40 as a serial signal, and the speed of the moving unit 40 is controlled.
  • the moving part 40 is moved in accordance with the movement of the swimmer 9, and the distance of the swimmer 9 from the poolside is determined in consideration of the positional deviation between the moving part 40 and the swimmer 9. It can be measured, and the moving speed can be measured based on the distance data.
  • the movement measuring device 1a since the swimmer 9 swimming in the pool 10 can always be photographed from directly above, there is almost no measurement error due to the angle on the dedicated image, and the correction process is unnecessary. Therefore, highly accurate measurement can be performed.
  • the same techniques as the movement measuring device 1 according to the first embodiment, such as moving speed measurement and stroke measurement, can be applied.
  • the swimmer 9 is photographed from above the pool 10 and the swimmer 9 moves.
  • the rail 41 may be installed below the course in the pool 10 and the moving unit 40 may be moved underwater to measure the movement of the swimmer 9.
  • the detection of the measurement target is more stable and more effective than on the water, though it is slightly affected by water droplets and bubbles.
  • the measurement target can be changed (for example, the edge of a swimsuit or the edge when a belt is worn on the waist is measured), and the detection method on water can be applied as it is.
  • FIG. 15 is an explanatory diagram of the movement measuring device according to the present embodiment.
  • the mobile measurement device 1 is installed in a fitness club 71, a university sport research facility 72, a top athlete measurement facility 73, etc. Connected to the Internet 80.
  • a database 75 is installed in the database management center 74, and is connected to the Internet 80 via the network device 70.
  • the network device 70 functions as data input means for inputting data such as the moving speed of another swimmer 9 through the Internet 80.
  • the moving speed data of the swimmer 9 and the stroke data for each stroke can be obtained in real time. For this reason, various data of the top players and players of each level that generate world records can be imported into the mobile measurement device 1 through the Internet 80. Using these data, one can set his / her own goal for each swimmer who is swimmer 9 and perform swimming training while comparing the goal.
  • a database as training data for improving abilities using data of interval training and strength training.
  • data is sent to the data management center 74 in a format determined by contract with each facility, and a database is created for the data.
  • Training and its The effects can be sent periodically to each facility via the Internet 80 or can be viewed via the Internet 80.
  • the movement measuring device of the present invention can be used for measuring the movement of a player in swimming practice. .

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Multimedia (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un dispositif de mesure mobile comprenant des caméras (2) destinées à prendre des images d'un nageur (9) évoluant dans une piscine (10), la prise d'images étant réalisée juste au dessus du nageur, et une partie de commande (8) destinée à calculer la vitesse de déplacement du nageur (9) sur la base des images prises par les caméras (2), la prise d'images juste au dessus du nageur (9), permettant d'éviter que la portion du nageur (9) à mesurer soit masquée par la rotation du bras du nageur (9) et par le dégagement d'eau et de bulles qui en résultent. Pour chaque unité de temps, il est possible de détecter précisément la position du nageur (9) sur la base des images prises, et par conséquent de mesurer en continu la vitesse de déplacement du nageur.
PCT/JP2002/001971 2001-03-15 2002-03-04 Dispositif de mesure mobile WO2002077653A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001-74318 2001-03-15
JP2001074318A JP2002277481A (ja) 2001-03-15 2001-03-15 移動計測装置

Publications (1)

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WO2002077653A1 true WO2002077653A1 (fr) 2002-10-03

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WO (1) WO2002077653A1 (fr)

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DE102004060402A1 (de) * 2004-12-14 2006-07-13 Adc Automotive Distance Control Systems Gmbh Verfahren und Vorrichtung zur Ermittlung einer Fahrzeuggeschwindigkeit
CN103852591A (zh) * 2012-11-30 2014-06-11 李华容 一种检测游泳速度的方法和系统
JP2016030099A (ja) * 2014-07-29 2016-03-07 京セラ株式会社 運動支援装置および運動支援方法
JP6497530B2 (ja) * 2017-02-08 2019-04-10 パナソニックＩｐマネジメント株式会社 泳者状態表示システムおよび泳者状態表示方法
JP6828894B2 (ja) * 2017-05-09 2021-02-10 国立大学法人 筑波大学 評価装置、評価システム、評価方法及びプログラム
CN112818842A (zh) * 2021-01-29 2021-05-18 徐文海 基于机器学习的智能图像识别游泳计时系统和计时方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60148574A (ja) * 1984-01-14 1985-08-05 蓮沼　功 トレ−ニング装置
JPH01270882A (ja) * 1988-04-22 1989-10-30 Ishikawajima Harima Heavy Ind Co Ltd 回流水槽式プール設備
US6169966B1 (en) * 1996-12-27 2001-01-02 Kabushiki Kaisha Toshiba Apparatus for detecting a moving state of an object

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60148574A (ja) * 1984-01-14 1985-08-05 蓮沼　功 トレ−ニング装置
JPH01270882A (ja) * 1988-04-22 1989-10-30 Ishikawajima Harima Heavy Ind Co Ltd 回流水槽式プール設備
US6169966B1 (en) * 1996-12-27 2001-01-02 Kabushiki Kaisha Toshiba Apparatus for detecting a moving state of an object

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