EP3479291A1 - Capteur, systeme d'analyse statistique et procede de determination et d'affichage de la hauteur d'un saut effectue par un sportif - Google Patents
Capteur, systeme d'analyse statistique et procede de determination et d'affichage de la hauteur d'un saut effectue par un sportifInfo
- Publication number
- EP3479291A1 EP3479291A1 EP17745404.8A EP17745404A EP3479291A1 EP 3479291 A1 EP3479291 A1 EP 3479291A1 EP 17745404 A EP17745404 A EP 17745404A EP 3479291 A1 EP3479291 A1 EP 3479291A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jump
- height
- determining
- athlete
- acceleration
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/20—Movements or behaviour, e.g. gesture recognition
- G06V40/23—Recognition of whole body movements, e.g. for sport training
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
-
- 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
- A63B24/0021—Tracking a path or terminating locations
-
- 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
- A63B24/0062—Monitoring athletic performances, e.g. for determining the work of a user on an exercise apparatus, the completed jogging or cycling distance
-
- 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
- A63B24/0021—Tracking a path or terminating locations
- A63B2024/0056—Tracking a path or terminating locations for statistical or strategic analysis
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
- G06F2218/12—Classification; Matching
Definitions
- the present invention relates to the field of multisport data sensors intended to evaluate the performance of an athlete. in different sports disciplines, especially in board sports.
- connected sensors are known to measure a set of raw parameters generated by the sporting practice.
- the connected sensor comprises a set of measurement sensors such as accelerometers and / or gyrometers, magnetometers or any type of measurement sensors. These data are then analyzed to deduce statistics of the athlete's performance.
- the parameters are used to detect sequences characteristic of the sport and to measure specific parameters of these sequences. For example, regarding tennis, services can be detected and speed of service measured. Regarding golf, it is the swing that is detected, its magnitude and the strike force of the ball can be measured.
- the jump can be calculated according to the rules of ballistics, the athlete can be likened to a projectile during the jump.
- the trajectory of the athlete can not be likened to that of a projectile, this is particularly the case when the aerodynamic aspects are important or when the sportsman is subjected to a force of propulsion during the jump. This last case is typically found for a surfing practitioner powered by a kite (kitesurfing in English).
- the present invention aims to solve the aforementioned drawbacks by proposing a method for analyzing the trajectory of a surfing practitioner during a jump and more particularly to calculate the height of the jump.
- This method can be applied advantageously to the practice of surfing powered by a kite without being limited thereto. It is based on filtering and integrating data from an accelerometer. In some modes of realization it advantageously comprises a quadratic correction to correct the errors introduced by uncertainties on the measurements of the accelerometer.
- the invention relates to a method for determining and displaying the height of a jump made by an athlete practicing an aquatic gliding sport, said method being carried out by a statistical calculation system comprising a connected sensor, said connected sensor comprising the less a measuring sensor including an accelerometer, characterized in that it comprises:
- a step of detecting a jump by recognizing the different phases of the jump by analyzing the athlete's acceleration and speed;
- the step of determining the rate of climb comprises determining the ascensional acceleration according to the following steps:
- the step of determining the rate of climb further comprises: - A step of applying a high-pass filter on the ascensional acceleration;
- the step of detecting a jump comprises in order:
- the detection of the landing is performed only when the ascensional acceleration exceeds said predetermined threshold for at least a predetermined time.
- the method furthermore comprises:
- the correction step consists in applying a quadratic correction to the height values reached by the athlete.
- the correction step consists in applying a linear correction to the height values reached by the athlete.
- the correction step consists in applying a linear combination of a quadratic correction and a linear correction to the height values reached by the athlete, the coefficients of the linear combination being determined by statistical analysis of several jumps.
- the correction step is applied to a subsampling of all the height values reached by the athlete during the jump.
- the connected sensor further comprising a satellite positioning module, the method comprises:
- the invention also relates to a statistical calculation system for determining and displaying the height of a jump made by an athlete practicing an aquatic sport, characterized in that it comprises:
- a connected sensor comprising at least one measuring sensor including an accelerometer
- the invention also relates to a connected sensor for determining the height of a jump made by an athlete practicing an aquatic sport, characterized in that it comprises:
- At least one measurement sensor including an accelerometer; means for determining the ascending speed of the sportsman from data obtained from the accelerometer;
- the invention also relates to a computer program comprising instructions adapted to the implementation of each of the steps of the method according to the invention when said program is executed on a computer.
- the invention also relates to an information storage means, removable or not, partially or completely readable by a computer or a microprocessor comprising code instructions of a computer program for executing each of the steps of the method according to the invention. the invention.
- FIG. 1 illustrates the architecture of a connected sensor according to one embodiment of the invention
- FIG. 2 illustrates the general flowchart of the method for calculating the height of the jump according to one embodiment of the invention
- FIG. 3 illustrates the height curve of a jump according to one embodiment of the invention
- FIG. 4 illustrates the height curve of a corrected jump according to one embodiment of the invention
- FIG. 5 is a schematic block diagram of an information processing device for implementing one or more embodiments of the invention.
- the invention relates to a method using a connected sensor, comprising a set of measurement sensors, worn by a water sport sportsman, on the one hand to identify the phases of a jump and to measure their height.
- the connected sensor comprises at least one accelerometer making it possible to obtain acceleration measurements of the connected sensor in a three-dimensional coordinate system linked to the connected sensor.
- the reference linked to the sensor is oriented in a land reference world. To do this, the gravitational constant acceleration is detected, it serves to identify the attitude of the sensor and in particular the vertical axis call Z axis of the world reference (X, Y, Z).
- the component of the measured acceleration of the sensor along this vertical axis or Z axis is determined over time.
- Filtering and integration steps make it possible to calculate the upward velocity or vertical velocity along this same Z axis.
- the different steps of a jump are then detected by an analysis of the curves of upward acceleration and upward velocity. These phases are takeoff, climb phase, descent phase and landing or landing in this case. Typically takeoff will be detected when the rate of climb becomes greater than a threshold. The start of the descent is detected when the rate of climb becomes negative, the landing when the acceleration increases abruptly and the end of the landing when the rate of climb returns below a threshold.
- the measured final height ie the height at the time of landing
- the athlete starts his jump from the water level and falls to the same level. This difference is due to various uncertainties such as those on the initial measurements of acceleration (noise, bias), or inaccuracies in the calculation of the attitude, that is to say the orientation of the sensor in space.
- a quadratic correction is performed on the height measurements to ensure that the measured final height is zero.
- the intermediate height values measured are corrected and therefore also the maximum value constituting the measured height of the jump.
- the quadratic correction of the jump height measurement requires the storage of all heights during the jump.
- the jump height measurements are downsampled with respect to the acceleration data obtained from the sensors to decrease the amount of data to be stored and thus the required memory size.
- FIG. 1 illustrates the architecture of a connected sensor 1.1 according to one embodiment of the invention.
- the connected sensor 1.1 comprises a set of measurement sensors 1.2, 1.3 and 1.4.
- the measurement sensor 1.2 is an accelerometer that measures linear acceleration values along the three axes of a marker linked to the sensor.
- the measurement sensor 1.3 is, for example, a gyrometer for measuring the angular rotation speeds around the three axes of the marker linked to the sensor.
- the measurement sensor 1.4 is, for example, a magnetometer for measuring the magnetic field in which the sensor is immersed.
- Other types of measurement sensors may be present, such as a GPS-based satellite positioning component, a heart rate sensor, a shock sensor, or any other type of measurement sensor.
- the measurement sensors produce measurement values at a frequency typically around 250 Hz which are stored in a storage module 1.5 which may be a writable memory component, a memory card, a disk or any other component allowing the storage of data. digital.
- the connected sensor is controlled by a processor 1.6 which allows the control of the measurement sensors as well as the reading and possible analysis of the data from the measurement sensors.
- the processor is able to perform algorithms for processing the raw data from the measurement sensors to produce processed data and statistical results on the processed data. For example, raw data from measurement sensors can be filtered, integrated and compared to thresholds.
- the connected sensor also typically has a communication module 1.7 which allows communication with various information processing devices external to the connected sensor. These communications can have several functions. For example, it is possible to transmit to the connected sensor operating parameters or updates of the algorithms executed by the processor 1.6.
- the communication module serves, among other things, to communicate the data to an external information processing device for viewing the statistical results of the sporting practice. For example, the athlete can view his statistics on a smartphone (smartphone in English).
- Communication technology is advantageously a radio technology such as Bluetooth or Wifi, but any communication technology can be used, wireless or wired.
- the processing performed on the raw data from the measurement sensors for obtaining the processed data and the statistical results on the sporting practice can be performed by the processor 1.6 within the sensor.
- the processed data and the statistical results are transmitted to the outside for visualization.
- the raw data from the sensors is transmitted and the processing is performed on an external device such as a smartphone for visualize the results.
- the processes may be distributed between the processor 1.6 of the connected sensor and the external device.
- the connected sensor is also provided with a screen which then allows the direct visualization of the statistical results on the sensor screen.
- the different modules making up the connected sensor communicate with each other via the communication bus 1.8.
- This connected sensor is intended to be worn by the sportsman during his practice of sport to allow the determination of statistics. For example, in the case of surf powered by a kite, the sensor can be attached to either the board used by the athlete, or to other sports equipment such as the harness attachment of the kite.
- FIG. 2 illustrates the general flowchart of the method of calculating the height of the jump according to one embodiment of the invention.
- a first step 2.1 the attitude of the connected sensor is determined. It is a question of locating a mobile three-dimensional reference linked to the sensor in a fixed three-dimensional reference linked to the earth. For example, this step can be done according to the following method. The raw data from the accelerometer and the gyroscope are obtained. These data are then corrected for a possible constant error known by a calibration step. The attitude variation of the moving marker can then be determined from the gyro data. Knowing this attitude, the projection of the acceleration measured in the movable coordinate system in the fixed coordinate system makes it possible to obtain the acceleration relative to the fixed reference point. This acceleration includes a component related to the gravitational pull that can be removed. An acceleration generated by the movement of the sensor in the fixed reference is then obtained.
- ⁇ X t represents the unfiltered acceleration acceleration at time i
- An estimate of the ascending velocity of the connected sensor can be obtained by integrating the ascensional acceleration.
- the integration can, for example, be calculated according to the following formula:
- a t represents the ascensional acceleration at time i
- Vi represents the rate of climb at time i
- ⁇ T t represents the value of a temporal label at time, that is to say that represents the time elapsed between the time i - 1 and the
- the upward speed will advantageously be calculated according to the following steps: • Determination of the ascensional acceleration filtered by applying a high-pass filter to the signal constituted by ascension acceleration measurements;
- step 2.3 we have a rising acceleration signal over time and a rising velocity signal over time.
- step 2.4 these signals will be analyzed to detect a jump made by the athlete.
- a jump is the succession over time of a climb phase, a descent phase and a landing. These phases are delimited by the succession of four events, the take-off, the start of the descent, the beginning of the landing and the end of the landing. Each of these events can be detected by analyzing at least one of the two signals constituted by the ascending acceleration and the rate of climb. A hop will be recognized when the four expected events are detected in the expected order.
- the rate of climb is characterized by a substantially zero value affected by a noise due to the movements of the sportsman and the measurement errors.
- the beginning of the jump is characterized by an ascensional speed which becomes clearly positive and the remainder during all the rise phase. The beginning of the jump can therefore be detected by comparing the rate of climb to a threshold. When the rate of climb becomes greater than the threshold, a potential jump start is detected. During the whole climb phase, the rate of climb is positive.
- the start of the descent is characterized by a rate of climb that vanishes and then becomes negative. The start of the descent is thus detected when the rate of climb becomes negative.
- the athlete's movements are gentle.
- the ascensional acceleration is therefore characterized by low values during these phases.
- landing is a shock and is therefore characterized by a sharp increase in the acceleration values.
- the landing is thus detected by the passing of a threshold by the value of the ascending acceleration.
- the threshold will be tested for a consecutive number of given acceleration values, for example 1 1 consecutive values.
- the end of the landing is characterized by the resumption of the glide on the water and thus an acceleration ascensionnelle which becomes again essentially null.
- the end of the landing is thus detected when the ascensional acceleration becomes lower than a threshold.
- FIG. 3 illustrates the calculation of the height of the jump h1 (t) according to one embodiment of the invention.
- This curve illustrates the calculated height as a function of time between time t1 and time t1.
- the maximum value of this curve h1 (t) between the instant tl and the instant tl gives us the height of the jump, the value we are looking for.
- the initial value of the integrated height is determined as zero, the athlete starting the jump at the water level.
- the height at the end of the jump, named final h, obtained at the time t1 proves to be not usually not zero. However, at the end of the jump, the athlete drops to the water level and therefore the height at the end of the jump must be the same as the height at the beginning of the jump, ie a zero height.
- This difference may be justified, for example if the landing is on a wave.
- this difference is generally an error caused by inaccuracy tainting the measurement of acceleration by accelerometers, gyrometers embedded in the connected sensor or because of an inaccuracy on the detection of the start of the jump.
- Figure 4 illustrates the calculation of the height of the jump by applying a correction to the curve il (t) to calculate a corrected curve h2 (t).
- the correction is based on the observation that the final height of the jump is zero. In some embodiments, the correction is applied only when the final height exceeds a given threshold.
- the correction applied to the curve h1 (t to obtain the corrected curve h2 (t is a quadratic correction .
- the curve il (t) consists of a series of values obtained typically at the frequency of sampling of the accelerometers present in the connected sensor This frequency is typically 100 Hz or 250 Hz
- the application of the correction requires the storage of the curvilinear (t), that is to say of the set of calculated height values constituting this curve
- the storage space that is to say the size of the buffer (buffer in English) which serves to memorize this information
- it is possible to memorize only a downsampled version of this curve for example, a 10 Hz version constituted by memorizing a value of 10 or 25 makes it possible to reduce by 10 or 25 the buffer size necessary for memorization
- sub-sampling upstream of acceleration or speed would lead to significant calculation errors.
- the measured ascensional acceleration y m (t) can be expressed as follows: Where is an unknown constant error and y (t)
- the calculation of from time t1 comprises calculating the ascending velocity v (t) by integrating the acceleration:
- the estimated height of the jump then corresponds to the maximum value of the corrected curve of a quadratic correction h2 (t) thus obtained.
- the correction applied to the curve h1 (t) to obtain the corrected curve h2 (t) is a linear correction.
- This linear correction is obtained by the formula:
- the correction applied to the curve il (t) to obtain the corrected curve h2 (t) is a linear combination between the quadratic correction and the linear correction.
- the coefficients ⁇ and ⁇ of the linear combination can be determined by statistical analysis of several jumps to determine the coefficients giving a best estimate of the height values and therefore of the maximum value which is the height of the jump.
- the connected sensor also has a satellite positioning module.
- the height values can be obtained directly by the satellite positioning module.
- the reliability and accuracy of the measurements from such a positioning module are dependent on the good reception of the satellite information and the number of satellites from which the information is received.
- the calculation methods described above based on the information from the accelerometer are then used, depending on the case, to confirm, for example by combination depending on the degree of confidence in each estimate, the information from the satellite reception module or to replace them when satellite reception is unsatisfactory.
- FIG. 5 is a schematic block diagram of an information processing device 5.0 for implementing one or more embodiments of the invention. It may be typically the architecture of the external device that can implement the methods described.
- the information processing device 5.0 may be a peripheral such as a microcomputer, a workstation or a mobile telecommunication terminal.
- the device 5.0 comprises a communication bus connected to:
- a central processing unit 5.1 such as a microprocessor, denoted CPU;
- RAM random access memory 5.2, denoted RAM, for storing the executable code of the method of realization of the invention as well as the registers adapted to record variables and parameters necessary for the implementation of the method according to embodiments of the invention;
- the memory capacity of the device can be supplemented by an optional RAM connected to an extension port, for example;
- ROM read-only memory
- a network interface 5.4 is normally connected to a communication network on which digital data to be processed are transmitted or received.
- the network interface 5.4 may be a single network interface, or composed of a set of different network interfaces (for example wired and wireless, interfaces or different types of wired or wireless interfaces). Data packets are sent on the network interface for transmission or are read from the network interface for reception under the control of the software application running in the 5.1 processor;
- a user interface 5.5 for receiving entries from a user or for displaying information to a user
- an input / output module 5.7 for receiving / sending data from / to external devices such as hard disk, removable storage medium or others.
- the executable code can be stored in a read-only memory 5.3, on the storage device 5.6 or on a removable digital medium such as for example a disk.
- the executable code of the programs can be received by means of a communication network, via the network interface 5.4, in order to be stored in one of the storage means of the network.
- communication device 5.0 such as the storage device 5.6, before being executed.
- the central processing unit 5.1 is adapted to control and direct the execution of the instructions or portions of software code of the program or programs according to one of the embodiments of the invention, instructions which are stored in one aforementioned storage means. After power-up, the CPU 5.1 is able to execute instructions from the main RAM 5.2, relating to a software application. Such software, when executed by the processor 5.1, causes the steps of the methods described to be executed.
- the connected sensor possibly associated with an external device is therefore a statistical calculation system adapted to calculate statistical parameters related to the sports practice of a user carrying the sensor.
- the system thus described is able to produce estimates of the height of jumps made by the athlete.
- the sensor or the external device are adapted to perform the calculations described to provide the athlete reliable statistics on his sport.
- the apparatus is a programmable apparatus that uses software to implement the invention.
- the present invention may be implemented in the hardware (for example, in the form of a specific integrated circuit or ASIC).
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1656129A FR3053490A1 (fr) | 2016-06-29 | 2016-06-29 | Capteur, systeme d'analyse statistique et procede de determination et d'affichage de la hauteur d'un saut effectue par un sportif |
| PCT/FR2017/051724 WO2018002517A1 (fr) | 2016-06-29 | 2017-06-28 | Capteur, systeme d'analyse statistique et procede de determination et d'affichage de la hauteur d'un saut effectue par un sportif |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3479291A1 true EP3479291A1 (fr) | 2019-05-08 |
Family
ID=56842909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17745404.8A Withdrawn EP3479291A1 (fr) | 2016-06-29 | 2017-06-28 | Capteur, systeme d'analyse statistique et procede de determination et d'affichage de la hauteur d'un saut effectue par un sportif |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20190362140A1 (fr) |
| EP (1) | EP3479291A1 (fr) |
| FR (1) | FR3053490A1 (fr) |
| WO (1) | WO2018002517A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113962138B (zh) * | 2020-07-21 | 2023-11-03 | 腾讯科技(深圳)有限公司 | 移动平台的参数值确定方法、装置、设备及存储介质 |
| US12337211B2 (en) * | 2023-10-03 | 2025-06-24 | Paul V. Mackovjak | Jump height measuring device and method of use |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2291701A1 (fr) * | 1997-06-02 | 1998-12-03 | Dennis M. Darcy | Systeme de mesure sportive permettant de determiner le temps dans l'air, la vitesse, la puissance absorbee et d'autres facteurs tels que la hauteur de chute |
| CN115421368A (zh) * | 2013-12-02 | 2022-12-02 | 耐克创新有限合伙公司 | 腾空时间 |
-
2016
- 2016-06-29 FR FR1656129A patent/FR3053490A1/fr active Pending
-
2017
- 2017-06-28 WO PCT/FR2017/051724 patent/WO2018002517A1/fr not_active Ceased
- 2017-06-28 US US16/314,089 patent/US20190362140A1/en not_active Abandoned
- 2017-06-28 EP EP17745404.8A patent/EP3479291A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US20190362140A1 (en) | 2019-11-28 |
| FR3053490A1 (fr) | 2018-01-05 |
| WO2018002517A1 (fr) | 2018-01-04 |
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