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EP2185250B1 - Procédé et dispositif de mesure des forces appliquées, du couple de rotation et du travail fourni sur un ergomètre ou une bicyclette - Google Patents

Procédé et dispositif de mesure des forces appliquées, du couple de rotation et du travail fourni sur un ergomètre ou une bicyclette Download PDF

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Publication number
EP2185250B1
EP2185250B1 EP08801075A EP08801075A EP2185250B1 EP 2185250 B1 EP2185250 B1 EP 2185250B1 EP 08801075 A EP08801075 A EP 08801075A EP 08801075 A EP08801075 A EP 08801075A EP 2185250 B1 EP2185250 B1 EP 2185250B1
Authority
EP
European Patent Office
Prior art keywords
shaft
torque
ergometer
bicycle
belt pulley
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.)
Not-in-force
Application number
EP08801075A
Other languages
German (de)
English (en)
Other versions
EP2185250A1 (fr
Inventor
Harald Grab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP2185250A1 publication Critical patent/EP2185250A1/fr
Application granted granted Critical
Publication of EP2185250B1 publication Critical patent/EP2185250B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
    • A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
    • A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
    • A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
    • A63B2071/065—Visualisation of specific exercise parameters
    • A63B2071/0652—Visualisation or indication relating to symmetrical exercise, e.g. right-left performance related to spinal column
    • 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
    • A63B2220/50—Force related parameters
    • A63B2220/54—Torque
    • 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
    • A63B2220/50—Force related parameters
    • A63B2220/58—Measurement of force related parameters by electric or magnetic means

Definitions

  • the invention relates to a method and a device for force, torque and power measurement on an ergometer or bicycle, as a result of a proper use of the same torque transmission from two pedals equipped cranks via a shaft on a belt drive and further on an ergometer flywheel or the rear wheel of the bicycle takes place, and wherein the belt drive comprises a pulley or a sprocket, which is connected in at least one direction of rotation with the shaft.
  • Ergometers and bicycles have long been used as training equipment and / or for rehabilitation, and it makes sense to measure during the intended use of these devices, the force applied by the user during training performance and evaluate accordingly.
  • Elaborate solutions for detecting the applied power include the evaluation of the voltage in a belt drive, such as a chain, over which the applied force can be determined and from which in turn can be converted in connection with a measured angular velocity on the performance. This is on the DE 10 2005 052 445 A1 directed.
  • a so-called power meter for a crank mechanism of a bicycle in which the force applied by a person is measured directly at the bottom bracket of the bicycle.
  • the pedaling force is converted into an electrical signal by the deformation of a suitable bending element, on which strain gauges are applied, and transmitted by inductive transmission to a receiver connected to the bicycle frame.
  • the pedaling speed is determined by the pedaling frequency. Both values, treading force and pedaling speed, are processed in a microcomputer on the bicycle, displayed and stored or converted into a power.
  • a device for detecting the applied forces and power at a pedal crank in particular a bicycle known, wherein a force is determined by measuring the shear deformation on the crank pin or on the pedal axle with arranged thereon strain gauges for both legs of the force applying person separately.
  • magnetostrictive torque sensors are based on the magnetic properties of ferromagnetic materials, where, for example, a tensile stress in the material causes an increase in a magnetic field induced in the material. In contrast, compressive stresses lead to a reduction of the induced magnetic field.
  • an AC powered sensor coil is used to induce the magnetic field into a ferromagnetic torque transmitting shaft.
  • a secondary take-up coil or other means monitors the changes in the induced magnetic field as the voltages in the shaft change with torque. The voltage signal induced in the secondary coil is an indicator of the torque.
  • the invention is based on the object, an improved method for force, torque and power measurement on an ergometer or to provide a bicycle and a device for its implementation, which is suitable for low metrological effort reliable measurement results and to capture separately for both legs of the ergometer or the bicycle properly used user.
  • the invention is based on the finding that conventional measuring methods on ergometers or bicycles, which are geared in particular to stress measurements in the belt drive or force measurements by means of strain gauges, are complicated and accordingly expensive.
  • the object is therefore initially achieved by a method for force, torque and power measurement on an ergometer or bicycle, as a result of a proper use of the same a torque transmission from two cranks fitted with pedals via a shaft on a belt drive and further on an ergometer Flywheel or the rear wheel of the bicycle takes place, and wherein the belt drive comprises a pulley or a sprocket which is rotatably connected to the shaft in at least one direction of rotation.
  • the elastic torsion of the shaft is detected in each case according to the principle of magnetostriction.
  • the generated sensor signals can be fed to the storage and / or evaluation unit electrically or without contact.
  • the invention provides that to determine the power provided by the user with his right and / or left leg, the rotational speed of the shaft is detected and the storage and / or evaluation unit is supplied, and that in the latter by dividing the on the right shaft - And / or left-side torque with the measured speed is calculated by the user with his right leg and / or his left leg performance is calculated.
  • Appliance related to the invention relates to a device for force and power measurement on an ergometer or bicycle, which due to a proper use of the ergometer or bicycle torque transmission of two pedals equipped with cranks via a shaft on a belt drive and further on an ergometer flywheel or the rear wheel of the bicycle takes place, and wherein the belt drive comprises a pulley or a sprocket, which is rotatably connected to the shaft in at least one direction of rotation.
  • At least one sensor for contactless detection of deformations of the shaft in the form of resulting from the torque transmission elastic torsions as a measure of the forces applied to the shaft forces to determine the torque and the power of both the left and right legs of the user of the ergometer or the bicycle is arranged.
  • the torque sensors are particularly advantageous for measuring the elastic torsion of the shaft formed by at least one magnetostrictive torque sensor.
  • the torque sensors each comprise at least one magnetically coded region on the shaft and at least one sensor coil arranged at a distance therefrom.
  • the magnetically coded regions of the shaft can be formed by magnetostrictive material coatings fixedly connected to the shaft or by separate, shaft-fixed attachments of said magnetostrictive material.
  • speed sensors are arranged on the surface of the shaft, which interact with a rotational speed sensor, which is arranged radially above the rotational speed sensors and connected to the storage and / or evaluation unit , Upon rotation of the shaft, the rotational speed sensors moved past the rotational speed sensor generate a rotational speed signal in the rotational speed sensor which is forwarded to the storage and / or evaluation unit.
  • the torque sensors are each electrically or non-contact connected to an electronic memory and / or evaluation unit for processing generated sensor signals of the detected deformations of the shaft.
  • the pulley or the sprocket including the axially arranged on both sides of the pulley or the sprocket sensors within one of two bearing points of the shaft axially limited region thereof may be arranged.
  • the pulley or the sprocket can also be arranged outside of an axially limited region of two bearing points of the shaft, wherein the sensors are arranged axially on both sides of the pulley or the sprocket, and wherein at least one sensor is disposed within said region ,
  • ergometer allows a Torque transmission from two cranks fitted with pedals via this shaft 1 to a belt drive and further to an ergometer flywheel.
  • the shaft 1 is rotatably mounted by means of rolling bearings at two bearings 2, 3 in a not-shown frame of the ergometer.
  • the belt drive is designed as a belt drive and has a belt pulley 4, which is connected in a rotationally fixed manner to the shaft 1 at least in one direction of rotation.
  • the pulley 4 is axially on each side of the pulley 4 respectively a sensor 5 or 6 for non-contact detection of deformations in the form of elastic from the torque transmission Twists of the shaft 1 is provided.
  • the elastically sensed elastic torsions provide a measure of the forces or torques applied to the shaft 1 for mathematically determining the power provided by the operator per unit time of both the left and the right leg of the user of the ergometer.
  • the measuring means are each formed by at least one magnetostrictive torque sensor 5 or 6 and comprise a magnetically coded region 5a, 6a on the shaft 1 and at least one spaced apart sensor coil 5b, 6b.
  • the mode of operation of such magnetostrictive torque sensors 5, 6 has already been explained in detail in the introduction.
  • the magnetically coded regions 5 a, 6 a are preferably formed by coatings of magnetostrictive material fixedly connected to the shaft 1.
  • the torque sensors 5, 6 and their sensor coils 5b, 6b are each electrically or non-contact, for example by radio or ultrasound, with an electronic memory and / or evaluation unit 7 for processing generated by the sensors 5, 6 sensor signals 8, 9 of detected deformations or elastic torsions of the shaft 1 connected.
  • the electrical voltage required for this purpose is expediently provided by a stationary electrical network and / or one or more accumulators.
  • Fig. 2 illustrated embodiment differs from the above-described variant essentially in that the pulley 4 is disposed axially outside the enclosed between the two bearing points 2, 3 of the shaft 1 area, although also axially on both sides of the pulley 4, the sensors 5, 6 are arranged, however, at least one of the sensors 5 is arranged within said area.
  • FIG. 2 shows Fig. 2 in that magnetic signal generators 10 are arranged at a distance from one another on the circumference of the shaft 1, which cooperate with a rotational speed sensor 11 known per se, which is positioned at a radial distance above the rotational speed sensors 10.
  • a rotational speed sensor 11 known per se
  • the torque applied to the respective side of the shaft 1 per unit of time can be determined in the storage and / or evaluation unit 7, and accordingly the respectively used power of the user .
  • the knowledge of the user's performance, particularly that applied by his right and / or left leg, is of interest not only for informing the user of the ergometer, but also for accurately adjusting the mechanical resistance of the ergometer's braking device, such as a related eddy current brake or a band brake.
  • the brake torque or the braking power of the eddy current brake is estimated from the supply voltage of the eddy current brake with the aid of a mathematically non-proportional relationship, which is intended to counteract or counteract the user of the ergometer.
  • the accuracy is in the range of ⁇ 10% to the actual value of the braking torque, which is judged to be insufficient, at least in diagnostically used ergometers.
  • the above embodiments are based on an ergometer with a belt drive in the form of a belt drive.
  • the invention is not limited to these embodiments, but also includes belt drives in the form of chain drives and conventional bicycles with belt or chain drive according to the invention with the special sensors 5, 6 for detecting the elastic torsion of the shaft 1 in the region of the bottom bracket under load during normal use, preferably with magnetostrictive torque sensors 5, 6 are equipped (not shown).

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  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Claims (10)

  1. Procédé pour mesurer la force, le couple et la puissance sur un ergomètre ou un vélo, une transmission de couple allant de deux pédaliers équipés de pédales via un arbre (1) à une commande d'enroulement et également à un volant d'ergomètre ou à la roue arrière du vélo intervenant du fait d'une utilisation normale de l'ergomètre ou du vélo, et la commande d'enroulement présentant une poulie (4) ou une roue dentée, qui est reliée de façon solidaire en rotation à l'arbre (1) au moins dans un sens de rotation, caractérisé en ce que, des deux côtés de la poulie (4) ou de la roue dentée, à chaque fois des torsions élastiques, résultant de la transmission de couple, de l'arbre (1) sont enregistrées indépendamment les unes des autres comme référence pour les forces appliquées sur l'arbre (1) pour déterminer le couple et la puissance aussi bien de la jambe gauche que de la jambe droite de l'utilisateur de l'ergomètre ou du vélo, des signaux de capteur (8, 9) correspondants sont générés et ces signaux sont amenés pour le traitement ultérieur à une unité de stockage et/ou une unité d'analyse (7), et
    en ce que la torsion élastique de l'arbre (1) est enregistrée à chaque fois selon le principe de la magnétostriction.
  2. Procédé selon la revendication 1, caractérisé en ce que la vitesse de l'arbre (1) est enregistrée et amenée à l'unité de stockage et/ou l'unité d'analyse (7) et en ce que la puissance appliquée par l'utilisateur avec sa jambe droite et/ou sa jambe gauche est calculée dans cette dernière unité par division du couple agissant sur l'arbre (1) côté droit et/ou côté gauche avec la vitesse mesurée.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les signaux de capteur (8, 9, 12) sont amenés électriquement ou sans contact à l'unité de stockage et/ou l'unité d'analyse (7).
  4. Dispositif pour mesurer la force et la puissance sur un ergomètre ou un vélo, une transmission de couple allant de deux pédaliers équipés de pédales via un arbre (1) à une commande d'enroulement et également à un volant d'ergomètre ou à la roue arrière du vélo intervenant du fait de l'utilisation normale de l'ergomètre ou du vélo, et la commande d'enroulement présentant une poulie (4) ou une roue dentée, qui est reliée de façon solidaire en rotation à l'arbre (1) au moins dans un sens de rotation, caractérisé en ce qu'à chaque fois au moins un capteur de couple (5, 6) magnétostrictif destiné à l'enregistrement sans contact de déformations de l'arbre (1) sous la forme de torsions élastiques résultant de la transmission de couple comme référence pour les forces appliquées sur l'arbre (1) pour déterminer le couple et la puissance aussi bien de la jambe gauche que de la jambe droite de l'utilisateur de l'ergomètre ou du vélo est disposé axialement des deux côtés de la poulie (4) ou de la roue dentée.
  5. Dispositif selon la revendication 4, caractérisé en ce que les capteurs de couple (5, 6) comprennent à chaque fois au moins une zone (5a, 6a) codée de façon magnétique sur l'arbre (1) et au moins une bobine de capteur (5b, 6b) disposée à distance de cette zone.
  6. Dispositif selon la revendication 5, caractérisé en ce que les zones (5a, 6a) codées de façon magnétique de l'arbre (1) sont formées par des revêtements, reliés fixement à l'arbre (1), à base de matériau magnétostrictif ou par des parties rapportées séparées, reliées fixement à l'arbre (1), à base de matériau magnétostrictif.
  7. Dispositif selon au moins l'une quelconque des revendications 4 à 6, caractérisé en ce que des transmetteurs de vitesse (10) sont disposés sur la surface de l'arbre (1), lesquels coopèrent avec un capteur de vitesse (11), lequel est disposé au-dessus des transmetteurs de vitesse (10) et est relié à l'unité de stockage et/ou l'unité d'analyse (7).
  8. Dispositif selon au moins l'une quelconque des revendications 4 à 7, caractérisé en ce que les capteurs de couple (5, 6) sont reliés à chaque fois électriquement ou sans contact à une unité de stockage et/ou une unité d'analyse (7) pour traiter des signaux de capteur (8, 9) générés des déformations enregistrées de l'arbre (1).
  9. Dispositif selon au moins l'une quelconque des revendications 4 à 8, caractérisé en ce que la poulie (4) ou la roue dentée avec les capteurs (5, 6) disposés axialement des deux côtés de la poulie (4) ou de la roue dentée est disposée à l'intérieur d'une zone de l'arbre délimitée axialement par deux points de palier (2, 3) de l'arbre (1).
  10. Dispositif selon au moins l'une quelconque des revendications 4 à 9, caractérisé en ce que la poulie (4) ou la roue dentée est disposée à l'extérieur d'une zone de l'arbre délimitée axialement par deux points de palier (2, 3) de l'arbre (1), les capteurs (5, 6) étant disposés axialement des deux côtés de la poulie (4) ou de la roue dentée, et au moins un capteur (5) étant disposé à l'intérieur de ladite zone.
EP08801075A 2007-08-24 2008-07-24 Procédé et dispositif de mesure des forces appliquées, du couple de rotation et du travail fourni sur un ergomètre ou une bicyclette Not-in-force EP2185250B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007040016A DE102007040016A1 (de) 2007-08-24 2007-08-24 Verfahren und Vorrichtung zur Kraft-, Drehmoment- und Leistungsmessung an einem Ergometer oder Fahrrad
PCT/DE2008/001237 WO2009026873A1 (fr) 2007-08-24 2008-07-24 Procédé et dispositif de mesure des forces appliquées, du couple de rotation et du travail fourni sur un ergomètre ou une bicyclette

Publications (2)

Publication Number Publication Date
EP2185250A1 EP2185250A1 (fr) 2010-05-19
EP2185250B1 true EP2185250B1 (fr) 2011-06-15

Family

ID=40076752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08801075A Not-in-force EP2185250B1 (fr) 2007-08-24 2008-07-24 Procédé et dispositif de mesure des forces appliquées, du couple de rotation et du travail fourni sur un ergomètre ou une bicyclette

Country Status (8)

Country Link
US (1) US8316709B2 (fr)
EP (1) EP2185250B1 (fr)
JP (1) JP2010537173A (fr)
CN (1) CN101784308B (fr)
AT (1) ATE512700T1 (fr)
BR (1) BRPI0815718A2 (fr)
DE (1) DE102007040016A1 (fr)
WO (1) WO2009026873A1 (fr)

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DE3417893A1 (de) 1984-05-14 1985-07-18 Daimler-Benz Ag, 7000 Stuttgart Anordnung zum beruehrungslosen nachweis bzw. zur beruehrungslosen messung mechanischer spannungszustaende von maschinenteilen
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US5027303A (en) * 1989-07-17 1991-06-25 Witte Don C Measuring apparatus for pedal-crank assembly
DE9415162U1 (de) 1994-09-19 1994-11-24 Petzke, Wolfgang, Dipl.-Ing., 80634 München Elektronisches Gerät zur Tretkraftbestimmung
US5816599A (en) * 1995-06-14 1998-10-06 Koyo Electronics Industries Co., Ltd Bicycle torque detection apparatus and bicycle including the same
JPH0995289A (ja) * 1995-09-29 1997-04-08 Honda Motor Co Ltd 補助動力装置付き自転車
DE102005052445B4 (de) * 2005-11-03 2009-07-30 Poddey, Alexander Verfahren zum Betrieb eines Trainingsgeräts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102749162A (zh) * 2012-07-19 2012-10-24 厦门尚宇环保股份有限公司 食物垃圾处理器电机力矩负载检测装置
CN102749162B (zh) * 2012-07-19 2015-02-18 厦门尚宇环保股份有限公司 食物垃圾处理器电机力矩负载检测装置

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WO2009026873A1 (fr) 2009-03-05
US8316709B2 (en) 2012-11-27
CN101784308B (zh) 2011-11-30
US20110179862A1 (en) 2011-07-28
BRPI0815718A2 (pt) 2015-02-10
EP2185250A1 (fr) 2010-05-19
ATE512700T1 (de) 2011-07-15
JP2010537173A (ja) 2010-12-02
DE102007040016A1 (de) 2009-02-26
CN101784308A (zh) 2010-07-21

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