• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method (METH) for detecting and calculating the duration of a jump performed by an individual, comprising the following steps: a detection (METH_Dt 2) of a moment associated with a reception following the jump, this step comprising a substep of detection (METH_Dt 2 _PC AC) of an amplitude acceleration peak greater than a first threshold amplitude, within acceleration measurements provided by a three-axis accelerometer embedded in a worn watch on the wrist of the individual. A detection (METH_Ds) of a jump phase, by detection, in a time window ending at the time of reception, of a succession of acceleration measurements between 0 G and 0.5 G for a greater duration at a first threshold time.
    公开号:CH713220A2
    申请号:CH01634/16
    申请日:2016-12-12
    公开日:2018-06-15
    发明作者:Germiquet Christophe；Ferri Yvan；Willemin Michel
    申请人:Swatch Group Res & Dev Ltd；
    IPC主号:
    专利说明:

    Description
    Field of the invention [0001] The invention relates to a method for detecting and calculating the duration of a jump. The method is adapted to jumps using means of movement to gain momentum before the jump, such as skis, a snowboard, rollers, a bike, a skateboard, etc. The method is also suitable for jumps not implementing such means of movement, for example jumps into the water from a cliff, a diving board or a bridge.
    By duration, we mean the difference between the moment of receipt and the moment when the athlete starts the jump. In the case of a jump in the water, reception is called the entry of the sportsman into the water.
    BACKGROUND OF THE INVENTION Document US 2002/0116147 discloses a method for detecting and analyzing a jump by means of a measurement unit mounted on displacement means used by an athlete. to gain momentum prior to the jump and in contact with the ground before and after the jump. The means of travel are for example skis or a snowboard. A calculation unit, for example a watch worn by the athlete, makes it possible to determine and display jump parameters, in particular the duration of the jump, based on measurements made by the unit of measurement. More precisely, the measurement unit detects vibrations of the displacement means, to detect when the moving means leave the ground and return to the ground, which makes it possible to detect a jump and to calculate its duration.
    This method has the disadvantage of requiring the use of a measurement unit to be fixed to the displacement means, in order to measure the vibrations they undergo. In addition, the method does not calculate the duration of a jump made without means of displacement in contact with the ground before and after the jump, for example a jump into the water from a cliff. SUMMARY OF THE INVENTION [0005] The object of the present invention is to overcome all or part of the disadvantages mentioned above.
    For this purpose, the invention relates to a method for detecting and calculating the duration of a jump performed by an individual, comprising the following steps: a detection of a moment associated with a reception following the jump , this step comprising a sub-step of detecting an amplitude acceleration peak greater than a first threshold amplitude, within acceleration measurements provided by a three-axis accelerometer embedded in a watch worn on the wrist of the individual. Detection of a jump phase, by detection, in a time window ending at the instant of reception, of a succession of acceleration measurements between 0G and 0.5 G for a duration greater than one first threshold duration.
    By acceleration measure is meant the standard of a 3 component acceleration vector, that is to say the square root of the sum of the squares of the components.
    The invention takes advantage of the observation that reception ground or in the water following a jump is at the origin of a strong acceleration peak observed in the data measured by a triaxial accelerometer. Detecting an acceleration peak is therefore an indication that a jump has been made. To confirm that a jump has been made and that the acceleration peak does not correspond to a false detection, the acceleration measurements preceding the acceleration peak are analyzed. Indeed, during a jump, the individual is in free fall, so the standard of its acceleration is in theory zero. A succession of acceleration measurements close to zero for a sufficiently long duration, followed by a sufficiently large acceleration peak, therefore indicates that a jump has been made.
    In addition to the above characteristics, the method according to the invention may include the following characteristics, taken alone or in combination in any technically possible combination.
    In one embodiment, the method comprises the following steps: a detection of a time associated with the start of the jump, corresponding to the first measurement of the succession of acceleration measurements between OG and 0.5 G - A calculation of a duration of the jump by difference of the moment associated with the reception and the moment associated with the beginning of the jump.
    When a jump phase has been detected, the acceleration measurements are used to calculate the duration of the jump. The first measure of the successive acceleration measurements between 0 and 0.5 G corresponds to the moment when the individual started the jump. As for the peak of acceleration, it corresponds to the moment when the individual has received. By subtracting the first measurement and the instant of the acceleration peak, the duration of the jump can be calculated.
    In a non-limiting embodiment, the step of detecting a time associated with a reception comprises a substep of detecting a pressure peak of amplitude greater than a second threshold amplitude and of shorter duration. at a second threshold duration, from pressure measurements provided by a pressure sensor on board the watch, and a substep of comparison of the instant associated with the peak of acceleration and the moment associated with the pressure peak .
    The aforementioned advantageous features take advantage of the observation that a consecutive reception to a jump is at the origin of a strong pressure peak observed in the data measured by a pressure sensor. A detection of a pressure peak is therefore an index of a reception which makes it possible to confirm that a jump has indeed taken place by correlation with the peak of acceleration.
    In a non-limiting embodiment, the second threshold amplitude is greater than 2 hectopascals and the second threshold time is greater than 0.1 second.
    In a non-limiting embodiment, the first threshold time is greater than 0.5 seconds.
    In a non-limiting embodiment, the first threshold amplitude is greater than 2 G.
    BRIEF DESCRIPTION OF THE DRAWINGS [0017] Other features and advantages will become clear from the description which is given below, by way of indication and in no way limitative, with reference to the appended drawings, in which:
    Fig. 1 represents an electronic watch allowing the implementation of the method according to one embodiment of the invention.
    Fig. 2 illustrates an example of a ski jumping trajectory.
    Fig. 3 shows a curve representing acceleration measurements superimposed on a curve representing pressure measurements, the measurements being taken during the jump of FIG. 2.
    Fig. 4 shows a functional diagram representative of the steps of the method.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0018] The METH process according to the invention is entirely implemented by an electronic MT watch carried by an individual performing a jump. In a non-limiting embodiment shown in FIG. 1, the MT watch comprises: a set of CP sensors, including a CP_AC accelerometer and a CP_AT (or altimeter) pressure sensor; an MD memory for recording measurements made by the CP sensors. The measurements are advantageously recorded in the memory in a sliding manner, according to the principle FIFO ("first in, first out")
    an MP microprocessor for processing the information contained in the memory MD
    digital or analog display means MA, for displaying the results of the calculations carried out by the microprocessor MP, the activation means MC, mechanical, electronic or tactile, the sensors CP, the memory MD, the microprocessor MP and the MA display means for triggering the PR process.
    FIG. 2 shows an example of a jump trajectory, in this case a ski jump. In a first phase P-i, the individual is in contact with the ground. At a time t0, the individual takes off from the ground, and in a second phase P2, the individual is in the climbing phase. At a time L, the individual reaches a maximum altitude H-ι, and in a third phase P3, the individual is in the descent phase. At a time t2, the individual receives on the ground, and in a fourth phase P4, the individual is again in contact with the ground.
    FIG. 3 shows a curve Ci representing altitude measurements AT calculated from the pressure measurements taken by the pressure sensor CP_PR of the watch MT, as a function of time t, and in particular during the four phases P · ,, P2, P3 and P4. A curve C2 representing the acceleration AC measured by the accelerometer CP_AC of the watch MT as a function of time t, is superimposed on the altitude curve C · ,.
    A first step of the method METH according to the invention consists in detecting that a jump has been made (step METH_Dr in Fig. 4). More particularly, the detection step METH_Dr comprises a first sub-step METH_Dr_PCAc consisting of detecting a peak of acceleration PCAc in the measurements provided by the accelerometer CP_AC Indeed, when a jump is carried out, one observes a peak of acceleration PCAC at time t2, that is to say at the ground reception of the individual. When such a PCAC peak is detected, it is compared to a threshold value beyond which it is decided that the PCAC peak corresponds to a ground reception following a jump.
    In one embodiment, to confirm that this acceleration peak PCAC corresponds to a consecutive reception to a jump, the METHJDr detection step also comprises a second sub-step METH_Dr_PCPR consisting of detecting a pressure peak PCPR in the measurements provided by the CP_PR pressure sensor. The corresponding PCAT altitude peak is represented in FIG. 3. If a jump has occurred, such a PCPR pressure peak should be raised at a time substantially identical to that at which the PCAC acceleration peak was detected. The moments corresponding to the PCPR pressure peak and the acceleration peak PCA0 are therefore compared. If the standard of the difference between these times is less than a threshold value, for example 0.5 seconds, then it is decided that the PCPR, PCAC peaks correspond to a ground reception following a jump.
    权利要求:
    Claims (6)
    [1]
    A second step of the method METH according to the invention consists in detecting a jump phase (step METH_Ds), by detecting, in a time window ending at time t2 determined previously, a succession of measurements of AC acceleration between 0 G and 0.5 G for a duration greater than a first threshold duration ts. For this, AC acceleration measurements in a time window preceding the acceleration peak PAc, for example a time window of about ten seconds, are analyzed. More precisely, the METH_Ds step of detecting a jump phase comprises a calculation of the norms of the acceleration measurements of the time window. It is then possible to determine whether the acceleration peak PCAc is preceded by a series of measurements comprised between 0 G and 0.5 G for a duration greater than the first threshold duration ts. If this is the case, it is confirmed that a jump has taken place and that the acceleration peak PCAC corresponds to a reception on the ground. Indeed, during the third phase P3, the individual is in free fall and therefore undergoes an acceleration of about 0 G. The first of the succession of measurements between 0 G and 0.5 G corresponds to a time to be assigned at the beginning of the jump. In a third step of the method, the duration Ts of the jump is calculated (METH_Ts step). For this, the moment h associated with the reception is subtracted from the instant to associated with the beginning of the jump. It is therefore noted that the step METH_Ds of detection of a jump phase contributes not only to confirm that a jump has taken place, but also to calculate the duration of this jump. Of course, the present invention is not limited to the example shown but is susceptible to various variations and modifications that will occur to those skilled in the art. claims
    1. Method (METH) for detecting and calculating the duration of a jump performed by an individual, comprising the following steps: a detection (METH_Dt2) of an instant (t2) associated with a reception following the jump, this step comprising a sub-step of detection (METH_Dt2_PCAC) of an acceleration peak (PCAc) of amplitude greater than a first threshold amplitude, within acceleration measurements (AC) provided by a three-axis accelerometer (CP_AC) embedded in a watch (MT) worn on the wrist of the individual. A detection (METH_Ds) of a jump phase, by detection, in a time window ending at the instant (t2) of reception, of a succession of acceleration measurements (AC) between 0 G and 0 , 5 G for a duration greater than a first threshold duration (ts).
    [2]
    2. Method (METH) according to the preceding claim, comprising the following steps: - A detection (METHJOt ·,) of a moment (to) associated with the start of the jump, corresponding to the first measurement of the succession of acceleration measurements (AC) between 0 and 0.5 G. - A calculation (METH_Ts) of a duration (Ts) of the jump by difference of the instant (t2) associated with the reception and the instant (t0) associated with the start of the jump.
    [3]
    3. Method (METH) according to one of the preceding claims, the step of detecting (METH_Dt2) a time (t2) associated with a reception comprising a substep of detection (METH_Dt2_PCPR) of a peak pressure ( PCPR) of greater amplitude than a second threshold amplitude and of duration less than a second threshold duration, from pressure measurements (PR) provided by a pressure sensor (CP_PR) embedded in the watch (MT), and a sub step of comparing the instant associated with the acceleration peak (PCAc) and the instant associated with the pressure peak (PCPR).
    [4]
    4. Method (METH) according to the preceding claim, wherein the second threshold amplitude is greater than 2 hectopascals and the second threshold time is less than 0.1 second.
    [5]
    5. Method (METH) according to one of the preceding claims, wherein the first threshold time is greater than 0.5 seconds.
    [6]
    6. Method (METH) according to one of the preceding claims, wherein the first threshold amplitude is greater than 2 G.
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    同族专利:
    公开号 | 公开日
    CH713220B1|2021-09-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01634/16A|CH713220B1|2016-12-12|2016-12-12|Method for detecting and calculating the duration of a jump.|CH01634/16A| CH713220B1|2016-12-12|2016-12-12|Method for detecting and calculating the duration of a jump.|
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