EP3292894B1 - Messvorrichtung der l-ausrichtung von zwei skier oder zwei skischuhe - Google Patents

Messvorrichtung der l-ausrichtung von zwei skier oder zwei skischuhe Download PDF

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Publication number
EP3292894B1
EP3292894B1 EP16187935.8A EP16187935A EP3292894B1 EP 3292894 B1 EP3292894 B1 EP 3292894B1 EP 16187935 A EP16187935 A EP 16187935A EP 3292894 B1 EP3292894 B1 EP 3292894B1
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EP
European Patent Office
Prior art keywords
ski
longitudinal axis
angle
boot
orientation
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English (en)
French (fr)
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EP3292894A1 (de
Inventor
Gilles Hamou
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Brison SA
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Brison SA
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/0802—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings other than mechanically controlled, e.g. electric, electronic, hydraulic, pneumatic, magnetic, pyrotechnic devices; Remote control
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/065—Anti-crossing devices
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C2203/00—Special features of skates, skis, roller-skates, snowboards and courts
    • A63C2203/18—Measuring a physical parameter, e.g. speed, distance
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C2203/00—Special features of skates, skis, roller-skates, snowboards and courts
    • A63C2203/24—Processing or storing data, e.g. with electronic chip

Definitions

  • the invention relates to a device for measuring the orientation of two skis or two ski boots.
  • the detection of risky situations for a skier requires knowing the orientation of the left ski relative to the orientation of the right ski in order to know for example if the two skis are parallel or on the contrary if the skis are oriented so as to cross each other or if they deviate from each other.
  • Such teaching is described in the document WO 2014/122366 .
  • the two skis can be equipped with autonomous devices, that is to say that they are equipped with all the sensors making it possible to determine in an absolute manner the position and the orientation of each ski as well as sensors making it possible to distinguish right ski and left ski. Under these conditions, the two sets of sensors just have to exchange information with a control circuit which will calculate which is the right ski and which is the left ski as well as the orientation of each of the skis in space. It is then easier to determine whether the two orientations of the skis represent risky configurations or not.
  • a simple way to obtain this information is to use a common repository, for example, magnetic north.
  • the document WO 2014/122366 proposes to integrate a magnetometer on a ski in order to know at all times the orientation of the ski in relation to magnetic north. In this case, the relative positions and orientations of the first ski relative to the second ski are easier to determine.
  • ski boot has a binding member which is configured to facilitate the separation between the boot and the ski under particular conditions. These particular conditions are materialized by an angular difference between the two boots and the ski and the determination of a forward progression of the ski boots. The deviation value angle is compared to a threshold value to detect a dangerous configuration.
  • the invention relates to the provision of a device for measuring the relative orientation of first and second skis or first and second ski boots which is more robust and / or makes it possible to dispense with magnetometers.
  • control circuit is further configured to ⁇ initiate a release of the first shoe with the first ski and / or the release of the second shoe with the second ski when the angle between the longitudinal axis of the first ski or of the first ski boot and the longitudinal axis of the second ski or second ski boot reaches a threshold value.
  • first additional sensor and the second additional sensor are configured to respectively provide a third additional information relating to the orientation of a second axis of the first ski or of the first ski boot relative to a second fixed spatial reference frame and a fourth additional item of information relating to the orientation of a second axis of the second ski or of the second ski boot relative to the second fixed spatial reference frame, the second axis being different from the longitudinal axis of the ski or of the ski boot and preferably orthogonal to the longitudinal axis.
  • the second axis of the first ski or of the first ski boot is perpendicular to the longitudinal axis and is included in the first plane.
  • control circuit is devoid of information from a magnetometer. It is also possible to provide in a particular embodiment, that the control circuit is devoid of information coming from a geolocation system.
  • control circuit is coupled to an additional sensor measuring the acceleration or the linear speed of the first ski or of the first ski boot along its longitudinal axis and that the control circuit is configured to record the orientation of the longitudinal axis of the first ski or of the first ski boot and the orientation of the longitudinal axis of the second ski or of the second ski boot as corresponding to a configuration where the longitudinal axis of the first ski is parallel to the longitudinal axis of the second ski when the first angle is equal second angle if the acceleration or the linear speed of the first ski or of the first ski boot along its longitudinal axis reaches a threshold value.
  • a pressure sensor is connected to the control circuit and is configured to detect the weight of the user on the first ski or on the first boot, the control circuit being configured to record the orientation of the longitudinal axis of the first ski or first ski boot and the orientation of the longitudinal axis of the second ski or second ski boot as corresponding to a configuration where the longitudinal axis of the first ski is parallel to the longitudinal axis of the second ski when the first plane is parallel to the second plane and when the pressure sensor detects a pressure greater than a threshold pressure.
  • control circuit is further configured to calculate the angle existing between the longitudinal axis of the first ski or of the first boot and the longitudinal axis of the second ski or of the second boot and define if the first ski is a right ski or a left ski or if the first shoe is a right shoe or a left shoe depending on the sign of said angle.
  • the first additional sensor is part of the first sensor and the second additional sensor is part of the second sensor.
  • This fixed spatial reference system comprises one or more fixed spatial directions which represent reference directions.
  • the vertical is particularly advantageous to use the vertical as a fixed spatial direction because the measurement can be easily carried out by means of gravity. Gravity can be measured using an accelerometer or a gyroscope. Another interesting spatial direction may be the direction which points to magnetic north. Magnetic north can be determined using a magnetometer.
  • a device for determining the position of a ski relative to the other ski and / or the orientation of a ski relative to the other ski It is also advantageous to provide that the device is also configured to discriminate between the right ski and the left ski.
  • a determination system by means of a magnetometer also has some drawbacks.
  • the use of a magnetometer makes it possible to absolutely define the orientation of a ski. As indicated above, if the magnetometer is faulty or unable to provide relevant information, it becomes very difficult for the control circuit to distinguish an acceptable situation from a risky situation.
  • the magnetometer can nevertheless be used to adjust an inertial unit, for example of the micro-electromechanical system (MEMS) type, which drifts over time, that is to say to readjust the inertial unit.
  • MEMS micro-electromechanical system
  • a simple way to solve this problem can be to impose a calibration step on the user, also called the adjustment step.
  • the user may be encouraged to place his two skis in a predefined configuration at the start of each session or each time he puts on his skis, for example parallel and flat.
  • the control circuit collects the relevant information from the various sensors and recalculates the criteria representative of the risk situations or corrects the data from the sensors.
  • the inertial unit can then operate with a certain autonomy for a limited period of time.
  • This calibration step can be particularly effective if it is carried out carefully by the skier.
  • the calibration step requires feedback to the user to indicate that the procedure is started and / or finished, which consumes specific resources, therefore costs and energy. It also imposes a formalism to be respected over a more or less long period of time and in an environment that one cannot always control. For example, a calibration step on a flat and substantially horizontal surface of a few seconds can be difficult to obtain at the exit of a gondola or chairlift. This step can therefore lead to reliability concerns.
  • ski positions are found very regularly among skiers and they propose to use these specific positions to calibrate, that is to say adjust the control circuit of a device for measuring the orientation of skis or ski boots.
  • the measuring device can be placed on the two skis or on the two ski boots which are attached to the two skis. It is even possible to combine the use of devices on the ski and on the boot.
  • the measuring device comprises several sensors C 1 and C 2 configured to measure the orientation of axes and / or planes representative of the first and second ski S 1 and S 2 and / or of first and second ski boots B 1 and B 2 .
  • the sensors are in particular configured to measure the orientation of a plane representative of the ski or ski boot relative to the vertical and follow the orientation of one or more axes which are not perpendicular to this plane.
  • ski boots B1 and B2 in the embodiments to be followed.
  • a person skilled in the art will keep in mind that what is presented for a ski can also be presented for a ski boot because in ski action, these two elements are fixed to each other.
  • the embodiments of the skis and ski boots will be explained.
  • the sensor C 1 comprises a first sensor which is configured to be arranged on a first ski S 1 .
  • the first sensor is configured to provide first information relating to the orientation of a first plane representative of the sole of the first ski S 1 .
  • the first sensor is configured to measure the orientation of a first plane relative to the first ski S 1 .
  • the first plane can be the plane of the sole or any other fixed plane which is not perpendicular to the plane of the sole. In the case where the sole is not flat, the plane of the sole is represented by the surface located directly under the foot of the user.
  • the first plane is for example the plane defined by the axes X 1 and Y 1 .
  • the sensor C 2 also includes a second sensor which is configured to be arranged on a second ski S 2 .
  • the second sensor is configured to provide second information relating to the orientation of a second plane representative of the sole of the second ski S 2 .
  • the second sensor is configured to measure the orientation of a second plane relative to the second ski S 2 .
  • the second plane can be the plane of the sole or any other fixed plane which is not perpendicular to the plane of the sole. In the case where the sole is not flat, the plane of the sole is represented by the surface located directly under the foot of the user.
  • the first plane is for example the plane defined by the axes X 2 and Y 2 .
  • the first sensor and the second sensor are configured to measure the angle that exists respectively between the first plane and the vertical direction and between the second plane and the vertical direction.
  • the angle between the vertical direction and the foreground is called the first angle.
  • the angle between the vertical direction and the second plane is called the second angle.
  • the vertical direction is represented by the acceleration vector of gravity g.
  • the foreground intersects the vertical direction and does not contain the vertical direction.
  • the second plane intersects the vertical direction and does not contain the vertical direction.
  • the first plane and the second plane each have at least two reference axes which are included in the plan to be followed.
  • the first reference axis is different from the second reference axis, preferably perpendicular to the second reference axis.
  • the angle between the vertical direction and the first plane and between the vertical direction and the second plane can be broken down into at least two distinct components.
  • the first component represents the angle that exists between the vertical direction and the first reference axis.
  • the second component represents the angle that exists between the vertical direction and the first reference axis.
  • the sensor C 1 comprises a first additional sensor which is configured to be arranged on the first ski S 1 .
  • the first additional sensor is configured to provide first additional information relating to the orientation of the longitudinal axis of the first ski S 1 .
  • the information relating to the orientation of the longitudinal axis of the first ski S 1 may be the orientation of the longitudinal axis or of any other axis which is fixed relative to the axis longitudinal and which is not perpendicular to the plane of the sole.
  • the longitudinal axis is shown on the figures 1 and 2 , by the axis X 1 .
  • the orientation of the longitudinal axis of the first ski or of the first boot is also called first orientation.
  • the orientation of the first additional sensor with respect to the ski can be arbitrary.
  • the first orientation is followed over time so as to follow the evolution of the orientation of the longitudinal axis of the ski over time.
  • the first orientation can be followed by means of a 3-axis gyroscope possibly supplemented by a 3-axis acceler
  • the sensor C 2 comprises a second additional sensor which is configured to be arranged on the second ski S 2 .
  • the second additional sensor is configured to provide second additional information relating to the orientation of the longitudinal axis of the second ski S 2 .
  • the information relating to the orientation of the longitudinal axis of the second ski S 2 may be the orientation of the longitudinal axis or of any other axis which is fixed relative to the longitudinal axis and which is not perpendicular in the plane of the sole.
  • the longitudinal axis is shown on the figures 1 and 2 , by the axis X 2 .
  • the orientation of the longitudinal axis of the second ski or of the second boot is also called the second orientation.
  • the orientation of the second additional sensor with respect to the ski can be arbitrary.
  • the second orientation is followed over time so as to follow the evolution of the orientation of the longitudinal axis of the ski over time.
  • the second orientation can be followed by means of a 3-axis gyroscope possibly supplemented by a 3-axis
  • Each additional sensor is configured to measure the orientation of the longitudinal axis of the ski S 1 or S 2 or of the boot B 1 or B 2 .
  • Each additional sensor can directly measure the longitudinal axis or any axis fixed relative to the longitudinal axis. Tracking the longitudinal axis of the ski or the shoe made by adding or removing a fixed angular value to the data provided by the additional sensor.
  • the first additional sensor is configured to provide, in addition, third additional information relating to the orientation of a second axis of the first ski or of the first ski boot relative to the fixed spatial reference system.
  • the second additional sensor is configured to provide, in addition, fourth additional information relating to the orientation of a second axis of the second ski or of the second ski boot relative to the fixed spatial reference system.
  • the second axis is different from the axis used to follow the longitudinal axis, preferably orthogonal to the longitudinal axis.
  • the first additional sensor C 1 can be part of the first sensor or even be a dissociated element.
  • the second additional sensor C 2 can be part of the second sensor or else be a dissociated element.
  • the measuring device also comprises a control circuit A which is connected to the first and second sensors and which is configured to compare the value of the angle existing between the first plane and the vertical with the value of the angle existing between the second plane and vertical.
  • the control circuit A receives information from the sensors C 1 and C 2 by any suitable technique, for example by a radiofrequency signal.
  • the comparison of the first angle with the second angle can be carried out in different ways by means of the first information and the second information.
  • one or more values representative of the two components of the first angle are compared to one or more values representative of the two components of the second angle.
  • first sensor and the second sensor in order to facilitate comparison of the first angle with the second angle, it appears particularly advantageous to configure the first sensor and the second sensor in an identical manner in order to follow the same planes and the same reference axes.
  • the first components are compared with each other. The same is true for the second components.
  • a reference axis is formed by the longitudinal axis of the ski.
  • the other reference axis is formed by the transverse axis of the ski.
  • the comparison of the first angle with the second angle is carried out by comparing only the minimum angle which exists between the plane to be followed and the vertical and its sign relative to the half-plane of the first and second plane. delimited by the longitudinal axis.
  • the modes of comparison between the two angles can vary for example as a function of the speed of the skier, his acceleration, his deceleration, his level of skiing.
  • the first sensor and the first additional sensor are part of the sensor C 1 .
  • the first sensor or the first additional sensor can be dissociated from the sensor C 1 . It can be the same for the sensor C 2 .
  • the sensor C 1 and / or the sensor C 2 can be 3-axis sensors configured to measure linear and / or angular accelerations.
  • the control circuit A is connected to the first and second additional sensors and is configured to compare the orientation of the first longitudinal axis with the second longitudinal axis.
  • control circuit receives information making it possible to calculate the orientation of the first ski in space and information making it possible to calculate the orientation of the second ski in space. All this information is processed to find out whether the ski orientations represent risky orientations or not.
  • the angular difference which exists between the orientation of the first longitudinal axis and the orientation of the second longitudinal axis is compared with one or more threshold values. Based on this comparison, the control circuit decides whether or not to trigger the heaving of at least one shoe with the associated ski.
  • the relative position of the skis is defined by means of 3 angular deviations.
  • a first angular difference corresponds to the angle formed between the longitudinal axes X1 and X2.
  • a second angular difference is formed between the transverse axes Y1 and Y2.
  • a third gap is formed between the axes Z1 and Z2.
  • Each angular deviation value can be independently compared to a specific threshold in order to detect whether the position of the skis corresponds to a risk situation or to a normal situation. Furthermore, the different angular deviation values can be compared in combination with one or more thresholds so as to detect whether the position of the skis corresponds to a risk situation or to a normal situation.
  • the different angular differences which exist between the two skis are calculated by considering that each ski has a reference point and that these two reference points are merged.
  • the reference point of a ski is the intersection between the X, Y and Z axes.
  • the reference point is located in the plane of the sole under the heel of the ski boot. In this configuration, the angular deviations are easier to calculate.
  • the angular difference which exists between the axis X1 and the axis X2, between the axis Y1 and the axis Y2 or between the axis Z1 and the axis Z2 is signed that is say that the control circuit takes into account the orientation of one ski relative to the other.
  • the control circuit is able to determine that the longitudinal axes of the skis approach or move away, more particularly the front or rear tips. It is the same for the angles between the axes Y1 and Y2 and between the axes Z1 and Z2.
  • the device is configured to operate in the absence of reliable information on a fixed geographical direction, for example magnetic north.
  • a magnetometer failure the orientation provided may be false and / or random. However, this does not prevent the device from tracking the relative evolution of the two skis reliably.
  • the control circuit is advantageously configured to compare the angle which exists between the orientation of the first plane and the vertical with the angle which exists between the orientation of the second plane and vertical.
  • the first angle is represented by the angle which exists between the axis g and the axis Z 1 .
  • the second angle is represented by the angle which exists between the axis g and the axis Z 2 .
  • the vertical that is to say the acceleration vector of gravity g, is used as a common reference frame for the first and second planes.
  • the orientation of the plane can be easily measured using an accelerometer, possibly supplemented by a gyroscope.
  • the control circuit can search if the first plane is parallel to the second plane. This search can be done simply by comparing the values of the first angle and the second angle to determine if they are equal or different. If the first angle is equal to the second angle, the two planes can be considered parallel.
  • the first angle is considered to be equal to the second angle, if the difference is less than or equal to 5 ° in absolute value.
  • the comparison of the orientation of the first and second planes can be carried out by comparing the value of the first angle with the value of the second angle. It is also possible to compare the difference between the first angle and the second angle with one or more threshold values.
  • the two sensors are installed identically on the two skis so that the first plane relating to the first ski is the equivalent of the second plane relating to the second ski.
  • the comparison between the orientations of the first and second planes can be facilitated by simply comparing the value of the first and second angles or the value of the difference.
  • control circuit considers that the two planes are parallel if the value of the first angle is equal to the value of the second angle at plus or minus 5 °. For example, the control circuit considers that the two planes are parallel if the difference between the first angle and the second angle is less than or equal to 5 ° in absolute value.
  • the inventor has discovered that during skiing, preferably when the skis are in motion, when the plane of the sole of the first ski S 1 is parallel to the plane of the sole of the second ski S 2 , the skis are mostly parallel.
  • the inventor has discovered that when skiing, preferably when the skis are in motion, when the angle formed between the plane of the sole of the first ski S 1 and the vertical is identical to the angle formed between the plane of the sole of the second ski S 2 and the vertical, the skis are mainly parallel.
  • the value of the angle takes into account its sign, that is to say the orientation of the ski.
  • the value of the first angle and the value of the second are different from 90 °, that is to say that the soles of the skis are not in a horizontal plane, it is advantageous to deduce therefrom that the skis are moving and therefore the skis are mostly parallel.
  • skis are parallel. Skis are considered parallel when the longitudinal axis of the first ski X 1 is parallel to the longitudinal axis of the second ski X 2 with a tolerance of a few degrees.
  • the planes of the two ski soles are not parallel .
  • the first and second angles formed by these planes with the vertical can be identical in absolute value but they have opposite signs. It can be the same during a turn.
  • the measurement of the first angle and of the second angle can be easily carried out by means of a 3-axis accelerometer possibly supplemented by a 3-axis gyroscope.
  • the control circuit A is configured to compare the orientation of the first and second planes. If the first and second planes form the same angle with the vertical, the control circuit A considers that the longitudinal axes are also parallel and it records this information by recalibrating the orientation of the two longitudinal axes. This record makes it possible to adjust the comparison between the first longitudinal axis and the second longitudinal axis to detect possible risk situations later. Only the relative position of the skis is used. It is therefore sufficient to redefine the measurement of the position of the longitudinal axes of the skis relative to one another and not to redefine the position of the longitudinal axes with respect to a reference geographic direction, for example magnetic north.
  • skis S 1 and S 2 are considered parallel, that is to say that the longitudinal axes are considered parallel, it is possible to readjust the additional sensors by sending information on the orientation of the first axis and / or of the second axis. It is also possible to correct the information transmitted within the measurement circuit for example by adding or removing a few degrees to the orientation of one of the skis or to the two skis S 1 and S 2 . It is still possible to recalculate the thresholds leading to the detection of a risk situation. These different options can be used independently or in any possible combination.
  • This embodiment is particularly advantageous since it is carried out when the skier is in ski action, that is to say in masked time. It can for example avoid fixed calibration periods which should be carried out regularly.
  • the skier moves on the track and the control circuit A detects one or more situations where the two soles of the skis S 1 and S 2 form the same angle with the vertical and it deduces therefrom that these situations correspond to times when the skis S 1 and S 2 are parallel.
  • the measurement circuit is recalibrated on the basis of this information in order to be able to detect risk situations more reliably thereafter.
  • the control circuit A can correct the drift of the inertial units by redefining the values corresponding to the two parallel skis.
  • the control circuit A can correct the drift of the gyroscope.
  • accelerometers configured to measure linear and / or angular velocities.
  • the axis longitudinal X 1 of the first ski S 1 is parallel to the longitudinal axis X 2 of the second ski S 2 .
  • the data relating to the first longitudinal axis or the second longitudinal axis remains relative data which are correlated by the measurement circuit.
  • This measurement can be used to replace a magnetometer or a calibration procedure. This measurement can also be used to supplement the measurement carried out by a magnetometer in the event of failure and / or absence of signal.
  • the figure 3 illustrates schematically the different actions of the control circuit for the recalibration of the longitudinal axes.
  • control circuit A receives information relating to the orientation of the first plane and the second plane.
  • the control circuit A calculates if the first angle is equal to the second angle, that is to say if the first plane forms the same angle with the vertical as the angle formed between the vertical and the second plan based on previous information.
  • the control circuit leaves the recalibration protocol. If the first and second planes form the same angle with the vertical and are therefore parallel (output O), the control circuit A can pass directly to a step S3 where the first and second longitudinal axes are considered to be parallel.
  • control circuit 1 records this information by adjusting the information relating to the first longitudinal axis and to the second longitudinal axis to secure the detection of a possible risk situation.
  • the comparison is not carried out or the result is not taken into account depending on the occurrence of another event.
  • the information indicating that the first plane and the second plane form the same angle with the vertical is only taken into account if the first plane and / or the second plane are different from the horizontal plane, c that is to say if the first and second planes intersect vertically without the vertical being perpendicular to these two planes.
  • This additional condition is represented for example by step S5 placed after the output O of step S2.
  • control circuit A can leave the recalibration protocol (output N) or condition the continuation of the protocol to the occurrence of another event (not shown).
  • control circuit A also measures the distance between the first ski S 1 and the second ski S 2 or the distance d between the first shoe B 1 and the second shoe B 2 .
  • the measured distance d is compared with a first threshold distance d1.
  • This additional condition is represented for example by step S6 placed after the output O of step S5.
  • the distance d is compared with two different threshold values.
  • control circuit A comprises or is coupled to an additional sensor measuring the linear acceleration of the first ski or of the first boot along its longitudinal axis X.
  • This additional sensor may be present in the sensor C1 and / or in sensor C2.
  • the control circuit A is configured to take into account the comparison between the first plane and the second plane if the linear speed of the first ski along its longitudinal axis reaches a threshold value, for example exceeds a threshold value (v> vseuil).
  • a threshold value for example exceeds a threshold value (v> vseuil).
  • This additional condition is represented for example by step S7 placed after the output O of step S6.
  • This precision makes it possible, for example, to eliminate the configurations where the skier is stopped or possibly at a very low speed and he voluntarily places his skis in positions incompatible with the practice of skiing at a conventional pace.
  • the speed compared can be an absolute measure, that is to say it does not take into account the direction of progression of the skier or relative that is to say that it differentiates a forward and a reverse.
  • control circuit can be configured to take into account the comparison between the first plane and the second plane when the acceleration measured by the sensor reaches a threshold value or is not zero.
  • This additional condition is represented for example by step S8 placed after the output O of step S7.
  • control circuit can be coupled to a pressure detector.
  • the pressure sensor is configured to detect whether the weight of the skier is present on the skis, for example for making a turn or braking, or more generally if it is in sliding action on the snow. This additional condition is represented for example by step S9 placed after the output N of step S8.
  • the control circuit can be configured to take into account the comparison between the foreground and the second plane when the pressure sensor sends a signal which reaches a threshold value.
  • the pressure sensor is placed in the ski, it is possible to discriminate the presence or absence of skiers.
  • the sensor is placed in the boot, provision must be made for the sensor or an additional sensor to be configured to detect the connection between the ski and the boot.
  • the control circuit can be configured to take into account the comparison between the first plane and the second plane when the sensor detects the connection between the ski and the associated boot.
  • control circuit is connected to means for analyzing the deformation of the ski or to means for analyzing vibrations in skiing.
  • This information can come, for example, from one or more strain gauges and / or from one or more blades made of piezoelectric material.
  • control circuit can be configured to take into account the comparison between the first plane and the second plane when the information provided by the means of analysis of the deformation of the ski or the analysis means vibrations in the ski return a first value.
  • steps S2, S5, S6, S7, S8 and S9 can be carried out in any order. It is even possible to provide that steps S5, S6, S7, S8 and S9 or a part of these steps are carried out between steps S3 and S4.
  • control circuit is devoid of information from a magnetometer.
  • This embodiment makes it possible to provide a measuring device devoid of a magnetometer to gain compactness and cost.
  • control circuit is devoid of information from a geolocation system to save energy. It is even more advantageous to provide a measurement device without a geolocation system to gain compactness and cost.
  • a clever way to distinguish the right sensor and the left sensor and therefore the right ski / right boot assembly from the left ski / left boot assembly is to measure the angle which exists between the longitudinal axis of the first ski S 1 and the longitudinal axis of the second ski S 2 during a ski descent.
  • the inventor observed that in skiing action, a skier very largely changes the orientation of his skis between a first position where the skis are parallel and a second position where the front tips are directed one towards the other to brake or to turn.
  • the angle formed at the level of the tip tips of the skis is for the most part an acute angle, in particular when the skis are not horizontal or are not close to horizontal.
  • the control circuit is able to deduce whether the first ski is the right ski or the left ski and vice versa for the second ski, c that is to say if the acute angle is formed on the side of the front spatulas or on the contrary on the rear part of the skis.
  • This measurement can be combined with a second measurement intended to analyze the direction of progression of the skier.
  • the acute angle formed by the skis is directed in the direction of progression of the skier which makes it possible to take into consideration a skier who chooses to ski in reverse.
  • This calibration phase can be carried out over a first period of time which follows the fixing of the ski boots on the skis. This calibration phase can also be carried out over a first period of time after a predefined duration of use of the ski.
  • the calibration phase can be initiated if the control circuit detects that the skis have been unused for a predetermined period, for example 5 minutes, and / or if the skis are in a particular position, for example the longitudinal axis of the ski is placed vertically.
  • the calibration phase can be carried out repeatedly, for example after a predefined duration, a predefined distance traveled and / or a predefined elevation. This calibration phase can also be carried out permanently.

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Claims (12)

  1. Vorrichtung zur Messung der relativen Ausrichtung von zwei Ski, aufweisend:
    - einen ersten Sensor (c1), der dafür ausgelegt ist, auf einem ersten Ski (s1) oder auf einem ersten Skischuh (b1) angeordnet zu werden, wobei der erste Sensor dafür ausgelegt ist, eine erste Information bereitzustellen, die einen ersten Winkel zwischen einer ersten Ebene (x1, y1) und der Vertikalen betrifft, wobei die erste Ebene für die Sohle des ersten Skis oder für die Sohle des ersten Skischuhs steht,
    - einen ersten zusätzlichen Sensor, der dafür ausgelegt ist, auf dem ersten Ski oder auf dem ersten Skischuh angeordnet zu werden, wobei der erste zusätzliche Sensor dafür ausgelegt ist, eine erste zusätzliche Information bereitzustellen, welche die Ausrichtung der Längsachse des ersten Skis oder des ersten Skischuhs gegenüber einem ersten festen räumlichen Bezugssystem betrifft,
    - einen zweiten Sensor (c2), der dafür ausgelegt ist, auf einem zweiten Ski (s2) oder auf einem zweiten Skischuh (b2) angeordnet zu werden, wobei der zweite Sensor dafür ausgelegt ist, eine zweite Information bereitzustellen, die einen zweiten Winkel zwischen einer zweiten Ebene (x2, y2) und der Vertikalen betrifft, wobei die zweite Ebene für die Sohle des zweiten Skis oder für die Sohle des zweiten Skischuhs steht,
    - einen zweiten zusätzlichen Sensor, der dafür ausgelegt ist, auf dem zweiten Ski oder auf dem zweiten Skischuh angeordnet zu werden, wobei der zweite zusätzliche Sensor dafür ausgelegt ist, eine zweite zusätzliche Information bereitzustellen, welche die Ausrichtung der Längsachse des zweiten Skis oder des zweiten Skischuhs gegenüber dem ersten festen räumlichen Bezugssystem betrifft,
    - einen Steuerschaltkreis, der dafür ausgelegt ist,
    ∘ den Wert des ersten Winkels mit dem Wert des zweiten Winkels zu vergleichen,
    ∘ die Ausrichtung der Längsachse des ersten Skis oder des ersten Skischuhs und die Ausrichtung der Längsachse des zweiten Skis oder des zweiten Skischuhs derart zu speichern, dass diese einer Konfiguration entsprechen, in welcher die Längsachse des ersten Skis parallel zur Längsachse des zweiten Skis ist, wenn der Wert des ersten Winkels gleich dem Wert des zweiten Winkels ist.
  2. Vorrichtung nach Anspruch 1, in welcher die erste Information einen Wert, der einen Winkel zwischen einer ersten Bezugsrichtung der ersten Ebene und der Vertikalen wiedergibt, und einen Wert aufweist, der einen Winkel zwischen einer zweiten Bezugsrichtung der ersten Ebene und der Vertikalen wiedergibt, wobei die erste Bezugsrichtung sich von der zweiten Bezugsrichtung in der ersten Ebene unterscheidet, und in welcher die zweite Information einen Wert, der einen Winkel zwischen einer ersten Bezugsrichtung der zweiten Ebene und der Vertikalen wiedergibt, und einen Wert aufweist, der einen Winkel zwischen einer zweiten Bezugsrichtung der zweiten Ebene und der Vertikalen wiedergibt, wobei die erste Bezugsrichtung sich von der zweiten Bezugsrichtung in der zweiten Ebene unterscheidet.
  3. Vorrichtung nach einem der Ansprüche 1 und 2, wobei der Steuerschaltkreis darüber hinaus dafür ausgelegt ist,
    ∘ ein Ausklinken des ersten Schuhs aus dem ersten Ski und/oder das Ausklinken des zweiten Schuhs aus dem zweiten Ski auszulösen, wenn der Winkel zwischen der Längsachse des ersten Skis oder des ersten Skischuhs und der Längsachse des zweiten Skis oder des zweiten Skischuhs einen Schwellenwert erreicht.
  4. Vorrichtung nach einem der Ansprüche 1 bis 3, wobei der erste zusätzliche Sensor und der zweite zusätzliche Sensor dafür ausgelegt sind, eine dritte zusätzliche Information, welche die Ausrichtung einer zweiten Achse des ersten Skis oder des ersten Skischuhs gegenüber dem festen räumlichen Bezugssystem betrifft, beziehungsweise eine vierte zusätzliche Information bereitzustellen, welche die Ausrichtung einer zweiten Achse des zweiten Skis und des zweiten Skischuhs gegenüber dem festen räumlichen Bezugssystem betrifft, wobei die zweite Achse sich von der Längsachse des Skis oder des Skischuhs unterscheidet und vorzugsweise rechtwinklig zu der Längsachse ist.
  5. Vorrichtung nach Anspruch 4, wobei der Steuerschaltkreis darüber hinaus dafür ausgelegt ist,
    ∘ mindestens einen Parameter ausgehend von dem Winkel zwischen der Längsachse des ersten Skis und der Längsachse des zweiten Skis, von dem Unterschied zwischen dem ersten Winkel und dem zweiten Winkel sowie von den dritten und vierten zusätzlichen Information zu berechnen,
    ∘ den mindestens einen Parameter mit mindestens einem schwellenwertartigen Parameter zu vergleichen,
    ∘ in Abhängigkeit von dem Vergleich ein Ausklinken des ersten Schuhs aus dem ersten Ski und/oder das Ausklinken des zweiten Schuhs aus dem zweiten Ski auszulösen.
  6. Vorrichtung nach einem der Ansprüche 4 und 5, wobei die zweiten Achse des ersten Skis oder des ersten Skischuhs senkrecht zur Längsachse ist und in der ersten Ebene verläuft.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, wobei der Steuerschaltkreis über keinerlei Information verfügt, die von einem Magnetometer stammt.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, wobei der Steuerschaltkreis über keinerlei Information verfügt, die von einem Geolokalisierungssystem stammt.
  9. Vorrichtung nach einem der Ansprüche 1 bis 8, wobei der Steuerschaltkreis an einen zusätzlichen Sensor gekoppelt ist, der die Beschleunigung oder die Lineargeschwindigkeit des ersten Skis oder des ersten Skischuhs gemäß dessen Längsachse misst, und wobei der Steuerschaltkreis dafür ausgelegt ist, sobald die Beschleunigung oder die Lineargeschwindigkeit des ersten Skis oder des ersten Skischuhs gemäß dessen Längsachse einen Schwellenwert erreicht, die Ausrichtung der Längsachse des ersten Skis oder des ersten Skischuhs sowie die Ausrichtung der Längsachse des zweiten Skis oder des zweiten Skischuhs derart zu speichern, dass sie einer Konfiguration entsprechen, in welcher die Längsachse des ersten Skis parallel zur Längsachse des zweiten Skis ist, wenn der erste Winkel gleich dem zweiten Winkel ist.
  10. Vorrichtung nach einem der Ansprüche 1 bis 9, wobei sie einen Drucksensor aufweist, der mit dem Steuerschaltkreis verbunden ist und dafür ausgelegt ist, das Gewicht des Benutzers auf dem ersten Ski oder auf dem ersten Skischuh zu detektieren, wobei der Steuerschaltkreis dafür ausgelegt ist, die Ausrichtung der Längsachse des ersten Skis oder des ersten Skischuhs und die Ausrichtung der Längsachse des zweiten Skis oder des zweiten Skischuhs derart zu speichern, dass sie einer Konfiguration entsprechen, in welcher die Längsachse des ersten Skis parallel zur Längsachse des zweiten Skis ist, wenn der erste Winkel gleich dem zweiten Winkel ist und wenn der Drucksensor einen Druck detektiert, welcher höher als ein Druckschwellenwert ist.
  11. Vorrichtung nach einem der Ansprüche 1 bis 10, wobei der Steuerschaltkreis weiterhin dafür ausgelegt ist, den Winkel zwischen der Längsachse des ersten Skis oder des ersten Skischuhs und der Längsachse des zweiten Skis oder des zweiten Skischuhs zu berechnen und in Abhängigkeit vom Vorzeichen dieses Winkels zu bestimmen, ob der erste Ski ein rechter Ski oder ein linker Ski ist beziehungsweise ob der erste Skischuh ein rechter Schuh oder ein linker Schuh ist.
  12. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei der erste zusätzliche Sensor Bestandteil des ersten Sensors ist und der zweite zusätzliche Sensor Bestandteil des zweiten Sensors ist.
EP16187935.8A 2016-09-08 2016-09-08 Messvorrichtung der l-ausrichtung von zwei skier oder zwei skischuhe Active EP3292894B1 (de)

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EP3613480B1 (de) 2018-08-22 2021-04-21 Swiss Timing Ltd. Verfahren und system zur kontinuierlichen einstufung eines konkurrenten beim durchlaufen eines parcours einer gleitsportdisziplin vom typ slalom

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FR2578432B1 (fr) * 1985-03-11 1987-06-12 Imberteche Rene Dispositif pour glisser et marcher sur la neige a bandes de glissement a geometrie variable, avec amortisseur et frein de securite
US6266623B1 (en) * 1994-11-21 2001-07-24 Phatrat Technology, Inc. Sport monitoring apparatus for determining loft time, speed, power absorbed and other factors such as height
CA2900102A1 (en) * 2013-02-06 2014-08-14 Blur Sports Inc. Performance monitoring systems and methods for edging sports
FR3001898B1 (fr) 2013-02-11 2015-04-03 Fabrice Devaux Fixation securisee de chaussure sur un ski
WO2015166143A1 (fr) * 2014-05-02 2015-11-05 Brison S.A. Dispositif de fixation securisee d'une chaussure sur un ski

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