DE102005052445B4 - Method for operating a training device - Google Patents

Abstract

Method for operating a stationary training device (1),
the training device (1)
- Having a motor organ (8) on which by a person exercising power (P _T ) is applied, and
A braking unit (11), by means of which power (P _BR ) is derived from the movement member (8),
with the following procedural steps during training:
a) detection of the current power derived from the brake unit (11) (P _BR ),
b) determining an acceleration power (P _B ) in the course of a change in the speed of the movement organ (8) by the exercising person
c) Approximation of the power applied by the exercising person (P _T ) taking into account
- The detected by the brake unit (11) derived power (P _BR ) and
- The specific acceleration power (P _B ) in the training device (1).

Description

The The invention relates to a method for operating a training device, in which approximates the power applied by an exercising person will, according to selected features of claim 1

STATE OF THE ART

• – ein Ergometer, welches einer physischen Rehabilitierung oder zur Bestimmung der physiologischen Leistungsfähigkeit von Personen dient,
• – ein stationäres Trainingsgerät für den Radsport (insbesondere ein Gerät mit Schwungscheibe und festem Rahmen oder ein Gerät mit einer Basis, in die ein für den Betrieb auf der Straße oder im Gelände geeignetes Fahrrad eingespannt werden kann, wobei als Bewegungsorgan eine Schwungscheibe oder das Hinterrad des Fahrrads Einsatz finden kann) oder
• – ein stationäres Rudergerät zur Simulation einer Ruderbewegung mit alleiniger Armtätigkeit oder kombinierter Arm- und Beintätigkeit der trainierenden Person

handelt.The invention finds use for the operation of a training device, which, for example, at

• - an ergometer used for physical rehabilitation or to determine the physiological capacity of persons,
• - A stationary training device for cycling (especially a device with flywheel and a fixed frame or a device with a base in which a suitable for operation on the road or off-road bike can be clamped, with a flywheel or the rear wheel of the Bicycle use can find) or
• - A stationary rowing machine for simulating a rowing movement with sole arm activity or combined arm and Bätätigkeit the exercising person

is.

Exemplary embodiments of such training devices are the publications US 2004 005 3751 A1 . DE 196 46 799 A1 . US 2005 008 992 A1 . WO 02/41952 A2 and EP 0 995 466 A1 for which the invention can be used. The abovementioned training devices usually have a movement organ, which is, for example, a rotating disc or a rotating wheel, to which power is applied by a person exercising, in particular with the interposition of a mechanical, electrical or hydraulic chain of action. At least part of the power applied to the movement organ is derived in a defined manner via a brake unit, whereby a load of the exercising person can be simulated.

costly solutions for one Recording the performance of the exercising person involve the evaluation of the tension in a chain over which the force applied by the exercising person is determined can, in conjunction with an angular speed on the performance can be converted.

Out DE 37 22 728 C1 It is known to detect the force applied by the exercising person via a detection of a deformation in the region of the crank or a crank disk and convert it into a power.

• – an mehreren Zeitpunkten gewonnenen Geschwindigkeiten,
• – dem Abstand der Zeitpunkte für die erfassten Geschwindigkeiten,
• – der reduzierten Masse des Trainingsgeräts und
• – einem Formfaktor, der sich aus der Kurvenform des von der trainierenden Person abgegebenen Drehmoments ergibt,

ermittelt wird.Documentation, for example, deals with the recording and documentation of the performance applied by the exercising person during the training DE 196 11 470 A1 according to which a power averaged over a period of time

• - speeds obtained at several points in time,
• The distance of the times for the detected speeds,
• - the reduced mass of the training device and
• A form factor resulting from the curve shape of the torque output by the exercising person,

is determined.

There the aforementioned systems usually due the sensors used and the removal of the signals from the moving Components are complex, finds mainly an evaluation in Range of a braking unit of the training device derived power use.

Out US 2003/0181293 A1 a method is known, with the proper functioning of the training device and its performance target is checked during training before starting a workout. For this purpose, the person conducting the test brings a flywheel to a defined angular velocity. When this angular velocity is reached, the driving power of the test person is adjusted. Following this, a defined braking effect is generated in the brake unit. The time or distance covered by the flywheel until the flywheel is completely stopped due to the braking effect is detected and compared with a time period specified by the company or a predetermined path. If the time duration determined by the test or the path deviates from the time or the path specified by the company, a display is generated in the case of this known exercise device which indicates that the exercise device is not functioning properly.

Another such "safety test" is off DE 41 37 526 A1 a check is to be made as to whether the ergometer performance still corresponds to the factory set, set ergometer performance or whether a recalibration of the ergometer is required. After a flywheel is brought to a defined angular velocity for this review process by the person performing the test, the speed of the flywheel decreases as a result of energy extraction by an internal friction and possibly by a desired additional braking torque. Once the speed has dropped to a defined starting speed n ₁ , starts a time counter. As soon as the speed of the flywheel has reached a defined lower end speed n ₂ , the time counter is stopped. The time value t measured in the time counter is a measure of the power which has been withdrawn from the moving parts of the ergometer between the defined speed values n ₁ and n ₂ by the brake unit. Preferably, several such time values can be determined in each ergometer, for example, a time value t for an idle and time values t for different set braking torques. If the values t acquired during the test match the setpoint values measured by the manufacturer, then the ergometer is in order and training can begin. In case of relevant deviations, a recalibration must be carried out before starting the training.

Further prior art is out DE 25 40 492 C2 such as DD 156 047 A3 known.

OBJECT OF THE INVENTION

Of the The present invention is based on the object, an improved Method for approximating the actual one exercising Person on a training device applied power during suggest the training operation of the training device.

SOLUTION

The The object of the invention according to the invention with the features of the independent claim 1 solved. Preferred embodiments of the solutions according to the invention arise accordingly the dependent claims 2 to 14.

DESCRIPTION OF THE INVENTION

Of the The present invention is based on the finding that a Recording the power dissipated in the brake unit insufficient exactly that reflected by the exercising person.

• – Für Ergometer sollen beispielsweise Reaktionen der physiologischen Werte wie die Herzfrequenz oder ein Blutdruck der trainierenden Person für eine medizinische Diagnostik ausgewertet werden. Die gewünschte Erfassung der Abhängigkeit der Änderung der physiologischen Werte von der Leistung erfordert eine exakte Erfassung der von der Person aufgebrachten Leistung. Die Anforderungen an eine derartige Leistungserfassung sind in DIN 13 405 niedergelegt. Weiterhin erfordert u. U. ein deutsches Eichgesetz eine Bauartzulassung und eine turnusgemäße Überprüfung. Für den Fall, dass bei einem Ergometer, insbesondere im Zusammenhang mit einer Rehabilitierung, die tatsächlich an der Bremseinheit erzeugte Leistung und damit die von der trainierenden Person aufgebrachte Leistung fehlerhaft ist und über einer therapeutisch gebotenen Leistung liegt, kann es zu einer Störung des Gesundungsprozesses kommen bis hin zu einer Beeinträchtigung des Gesundheitszustands des Patienten.
• – Von weiterer Bedeutung ist eine exakte Erfassung der Leistung im Sportbereich, bei der während einer Trainingseinheit eine temporär aufgebrachte Leistung und/oder eine aufgebrachte Gesamtleistung angezeigt oder dokumentiert werden soll. Weiterhin soll für ein wiederholtes Training eine Leistungsänderung der trainierenden Person dokumentiert werden, wobei auch geringfügige Leistungszuwächse von Interesse sind.
• – Für eine Studie der Bewegungsabläufe einer trainierenden Person, insbesondere im Amateur- und Profisportbereich, ist auch eine exakte Erfassung der Leistungsverläufe über die Bewegungsverläufe von Interesse. Für ein Trainingsgerät für den Radsport bedeutet dies beispielsweise, dass u. U. die Leistung des Trainierenden als Funktion des Pedalwinkels erfasst werden soll, woraus Rückschlüsse über den Tretrhythmus der trainierenden Person gezogen werden sollen.
• – Erhöhte Anforderungen an die Erfassung der Leistung sind auch dann zu stellen, wenn eine Bremseinheit, über die die Energie des Bewegungsorgans abgeführt werden soll, über eine Steuerung oder Regelung angesteuert wird, bei der eine fehlerhaft erfasste Leistung zu zusätzlichen Regelungsproblemen und Regelungsabweichungen führen kann. Ist die Steuerung oder Regelung auf das "Nachfahren" eines vorgegebenen Leistungsprofils ausgerichtet, kann dies u. U. erhöhte Anforderungen an die Erfassung der tatsächlich erbrachten Leistung bedingen.
• – Ebenfalls möglich ist, dass eine Steuerung oder Regelung der Bremseinheit derart erfolgen soll, dass ein Zielpuls einer trainierenden Person erreicht werden soll oder ein definiertes Pulsprofil "nachgefahren" werden soll, wofür auch eine exakte Erfassung der Leistung der trainierenden Person erforderlich ist.
• – Ein wesentlicher Aspekt beim stationären Training ist die Überwindung des so genannten oberen und unteren Totpunkts bei der Pedalbewegung. Infolge des gebildeten Kurbeltriebs und der Physiognomie der trainierenden Person ist eine kontinuierliche Kraftausübung auf das Pedalsystem nicht möglich. Die Beinmuskulatur wird zumeist nur zum "Drücken" und, in vermindertem Ausmaß, zum "Ziehen" am Pedal – nicht jedoch zu einem waagerechten "Schieben" im Bereich der vorgenannten Totpunkte eingesetzt. Beim Radfahren auf der Straße fällt dies nicht auf, da eine im Körper des Benutzers gespeicherte kinetische Schwungenergie eine Fortbewegung über den Totpunkt ermöglicht, ohne dass hierzu unmittelbare Muskelkraft erforderlich ist. Bei Betrieb von stationären Trainingsgeräten kann die Überwindung der Totpunkte allerdings als ungewöhnlich oder anstrengend empfunden werden. Das vorgenannte Problem kann durch den Einsatz von Schwungrädern gemindert werden, wobei in jedem Fall die Antriebsleistung der trainierenden Person nicht über die Verdrehung der Kurbel konstant ist, sondern oszilliert. Eine Erfassung derart oszillierender Leistungen kann ebenfalls von Bedeutung sein. Eine Erfassung der Abweichung zwischen der vom Benutzer abgegebenen und der am Bremssystem abgeführten Leistung ist insbesondere bei Rudergeräten, welche eine Schwungmasse verwenden, erheblich.

An exact determination of the performance applied by the exercising person is important for several alternative or cumulative reasons:

• For ergometers, for example, reactions of the physiological values such as the heart rate or a blood pressure of the exercising person are to be evaluated for medical diagnostics. The desired detection of the dependence of the change of the physiological values on the power requires an exact detection of the power applied by the person. The requirements for such a performance recording are laid down in DIN 13 405. Furthermore, u. U. a German calibration law, a type approval and a regular review. In the event that in an ergometer, especially in connection with rehabilitation, the power actually generated at the brake unit and thus the power applied by the exercising person is faulty and is above a therapeutically required power, the recovery process may be disrupted up to an impairment of the health condition of the patient.
• - Of further importance is an exact recording of performance in the sports sector, during which a temporarily applied performance and / or an applied total performance should be displayed or documented during a training session. Furthermore, a change in performance of the exercising person is to be documented for repeated training, whereby even slight increases in performance are of interest.
• - For a study of the movements of an exercising person, especially in the amateur and professional sports, is also an exact recording of performance patterns on the movement patterns of interest. For a training device for cycling, this means, for example, that u. U. the performance of the exerciser is to be detected as a function of the pedal angle, from which conclusions about the pedaling rhythm of the exercising person to be drawn.
• - Increased demands on the detection of the power are also to be made when a brake unit over which the energy of the motor organ is to be dissipated, is controlled by a controller or regulation in which a faulty detected performance can lead to additional control problems and control deviations. If the control or regulation is aimed at "following" a given power profile, this can u. U. increased requirements for the recording of the actual performance required.
• - It is also possible that a control or regulation of the brake unit should be such that a target pulse of a person exercising is to be achieved or a defined Pulsprofil to be "nachgefahren", for which an exact detection of the performance of the exercising person is required.
• - An essential aspect of stationary training is the overcoming of the so-called top and bottom dead center in the pedal movement. As a result of the crank mechanism formed and the physiognomy of the person exercising a continuous application of force to the pedal system is not possible. The leg muscles are usually only for "pushing" and, to a lesser extent, for "pulling" on the pedal - but not for a horizontal "pushing" in the area used the aforementioned dead centers. This does not occur when riding on the road, as kinetic momentum stored in the user's body allows it to travel past dead center without the need for immediate muscle power. When operating stationary training devices overcoming the dead centers, however, can be perceived as unusual or exhausting. The above problem can be alleviated by the use of flywheels, in each case the driving power of the exercising person is not constant over the rotation of the crank, but oscillates. Detecting such oscillating powers may also be important. Detecting the deviation between the power delivered by the user and the power dissipated by the brake system is particularly significant in rowing machines which use a flywheel mass.

• – einer Beschleunigung des Bewegungsorgans (und u. U. der Wirkkette zwischen der trainierenden Person und dem Bewegungsorgan) und/oder
• – einer Verlustleistung, beispielsweise infolge von Reibung in der Wirkkette bis zu der Bremseinheit

eine Leistung aufzubringen ist, die sich nicht in einer Bremsleistung einer Bremseinheit unmittelbar widerspiegelt. Beispielsweise bedeutet dies, dass für eine u. U. starke Beschleunigung eines Schwungrads hohen Massenträgheitsmoments die über die Bremseinheit erfasste Leistung der trainierenden Person zu niedrig ist, während beispielsweise für Einstellung der Leistungseinbringung durch die trainierende Person und einen Auslauf der Schwungmasse unter Ausnutzung eines Freilaufes und unter Erzeugung einer Bremswirkung eine Leistung der trainierenden Person vorgespiegelt wird, die tatsächlich nicht erbracht wird.Due to the importance of accurately detecting the power applied by the exercising person, the invention has investigated ways of detecting sources of error in performance. In the run-up to the invention, it has been found that as a result

• An acceleration of the movement organ (and possibly the chain of action between the exercising person and the movement organ) and / or
• - A power loss, for example due to friction in the chain of action to the brake unit

to apply a power that is not directly reflected in a braking performance of a brake unit. For example, this means that for a u. U. strong acceleration of a flywheel high moment of inertia detected by the braking unit performance of the exercising person is too low, while, for example, for adjusting the power input by the exercising person and an outlet of the flywheel using a freewheel and generating a braking performance of the exercising person is reflected, which is actually not provided.

Of the The invention is thus based on the finding that the power loss and / or the acceleration power depending on the operating mode a significant Influence on the performance to be provided by the person, so that neglect these power shares according to the known solutions not is justified. On the other hand, the invention has recognized that a consideration the mentioned performance shares possible is, u. U. using simple detection methods, calibration method and calculation methods.

According to the proposal According to the invention, the approximation of the training takes place Person charged performance considering the specific Acceleration performance in the exerciser in addition to that detected by the brake unit derived power.

According to one Development of the invention is that of the exercising person Applied performance not exclusively taking into account the approximated power derived from the brake unit. Rather, in addition for the Approximation considered a certain power loss in the training device. This power loss can be done simultaneously with the approximation be determined. In particular, the power loss but in time prior to detecting the power derived from the brake unit captured and then later used again in the approximation of the power. For this purpose can stored a previously recorded power loss in the exercise device be, for example, as a functional dependence, constant or in Form of a map. The power loss can also be factory with the production on a test bench have been measured exactly or in a further embodiment of the invention by the user of the exerciser before initial startup and / or recorded before each workout.

Corresponding a development of the invention is a detection or approximation the acceleration performance. This detection or approximation can be in the form of a time signal, at discrete times or in the form of an integral or average value for the acceleration power, preferably for a period shorter is as a whole pedal revolution or one turn of the flywheel.

For one regard the accuracy of the approximation of the person exercising Achieved performance is enhanced both by the the brake unit derived power as well as the acceleration performance as well as the power loss, so that all essential Performance shares are recorded.

• – eine kinematische Größe wie ein zurückgelegter Weg oder Winkel, eine Winkelgeschwindigkeit oder eine Winkelbeschleunigung,
• – eine Änderung der vorgenannten kinematischen Größen mit der Zeit,
• – eine Temperatur,
• – eine Kraft oder ein Moment,
• – eine Viskosität für den Fall eines Einsetzens einer hydraulischen Bremseinheit oder eine elektrische Größe für den Einsatz einer elektrischen Bremseinheit.

Preferably, in a method according to the invention, at least one operating variable is detected metrologically during the training operation of the training device. This can be any operating variable that has an influence on the power components of interest in the training device, for example

• A kinematic variable such as a distance traveled or angle, an angular velocity or an angular acceleration,
• A change of the aforementioned kinematic variables with time,
• A temperature
• - a force or a moment,
• - A viscosity in the event of insertion of a hydraulic brake unit or an electrical variable for the use of an electric brake unit.

On Basis of the recorded company size can be via a function or a Map the braking power, the acceleration performance and / or the power loss are at least approximated. For example can factory default a function or a map be given like a power loss in the form of friction from a speed depend on the friction partner can. On the other hand, an acceleration performance correlates with a change the angular velocity of the motor or the braking power from an electrical signal in an electric brake or from a viscosity or flow velocity of a fluid in a hydraulic brake. Also possible the use of a magnetic signal of an eddy current brake, this being a current caused by a magnetic field vortex or directly the strength of the magnetic field. With the mentioned function or a map can be the dependency the performance shares of the farm size particularly easy being, being over the choice of function or characteristic diagram the characteristic of the power component can be approximated accurately enough. On the other hand, a Variety of farm sizes conventional known exercise equipment anyway recorded. For example, usually finds an evaluation the angular velocity of the driven wheel or the hereby correlating angular velocity of the pedal and / or the cadence Commitment.

A particularly individual adaptation to the conditions of the training device found at the start of training, in particular with a first training or with each training, is possible by the fact that a calibration method is used before this start of training, which serves to gain knowledge during training for detecting the braking power , can be used to determine the power loss and / or to determine the acceleration power. For example, using the US 2003/0181293 A1 and or DE 41 37 526 A1 gained knowledge of the characteristics obtained with the calibration of the brake unit for the training operation, u. U. deviating to a factory default characteristics, be used without a return of the training device to the manufacturer is required. On the other hand, any characteristic data for characteristic maps can be obtained during a calibration, which are used in later operation to determine the power components. It is also possible to adjust parameters in the event that the performance components are modeled in the form of a functional dependency.

According to one Another proposal of the invention will initially energy in the course of the aforementioned calibration introduced into the locomotor. Such introduction of Energy takes place for example by motor drive of the movement organ. In the simplest case, however, the energy is exercising Person introduced into the movement organ. Followed by this without further energy generation by the exercising person one Dissipation of energy due to power dissipation, the brake unit is disabled. Thus, the motor organ is only by losses, For example, due to friction in bearings o. Ä. Or slowed down flow losses. Out the energy change Over time, the power loss in the exerciser can then be deduced become.

A Another embodiment of this calibration step uses the knowledge from that the power loss is not necessarily constant, but in certain circumstances depending on the speed can be. Furthermore, this embodiment makes use of the fact that for a deceleration of the motor due to the power loss wide speed range covered becomes. Accordingly, the power loss for individual different speeds or speed ranges are detected, thereby easily creating a map or a functional dependency can be generated, which depends is from the angular velocity of the motor.

In alternative embodiment is also initially for a calibration Energy introduced into the locomotor. Following this will be the energy of the motor organ without further introduction of external Energy dissipated by the activated brake unit, the brake unit defines constant or applied according to a given profile can be. Over time results as a result of the activated brake unit a change the energy of the motor, which is derived from the brake unit Braking power determined. Thus, in such a calibration step the dependence the braking power detected by the application of the brake unit The calibration also involves a detection of a a permanent operation of the training device changing characteristics of the Brake unit allows. These gained insights can subsequently be found in be used in a training operation.

Also for detecting the braking power by the aforementioned calibration step, a speed dependence, for example in the form of a Map or in the form of a functional dependency. A multi-dimensional parameter field or functional field can result if both a dependence of the braking power on the application of the brake and the speed is modeled. In this case u. U. a multiple repetition of the calibration step for different exposures of the brake unit required.

A Another embodiment of the invention has recognized that in a Detecting the braking power in a calibration step as well the power loss is effective in the exerciser. To these effects for one The exact determination of the performance shares to be separated, is initially a first calibration step in which the brake unit is not activated is, so that recorded in the first calibration step, the power loss becomes. Following this in a second calibration step, the detection of the braking power, wherein in this calibration step, the power dissipated can be. The first and second calibration steps can here executed separately be so for each calibration step introduces energy into the motor is and a slowing down of the motor to a lower limit speed or the speed 0 occurs. Alternatively, an implementation of both Calibration steps for a single deceleration of the motor to speed 0 occur in each separate phases of different Speed ranges. This is possible in particular if the speed dependency of Losses are approximated by a parameter function. on the other hand takes place with a direct storage and use of the actual measurement data the measurement at the same speed ranges.

For the aforementioned Detections of the performance shares is u. U. the knowledge of the moment of inertia the flywheel, a vehicle wheel and / or the chain of action between the exercising person and the movement organ required. One such mass moment of inertia can be implemented at the factory, entered by the user be based on separately performed measurements or on the basis of of characteristics that the exerciser and possibly the bike of the exercising Describe person. For the case of using a flywheel with large mass u. U. remaining parts of the chain of action, the one relatively small Have mass even when converting to the rotation of the flywheel, be ignored, so that as mass moment of inertia only the moment of inertia considered the flywheel which is usually even with permanent operation does not change. To increase the Accuracy, especially for the case of a movement organ in the form of a bicycle rear wheel, can in an alternative or additional Calibration step is the mass moment of inertia of the locomotor including or exclusively the chain of action is detected. This is done, for example, by that on the chain of action and / or the movement organ a defined Force, a defined moment or a defined energy applied becomes and the adjusting angular velocity of the movement organ is detected, then from the mass moment of inertia are calculated can. For example, in a pedal of a training device for cycling a defined weight in a defined position of the Pedals are applied. Alternatively, conclusions are drawn to the moment of inertia thereby possible that the movement organ with a defined additional moment of inertia or an additional mass is provided and from a comparison of Movement behavior of the motor organ with and without additional mass moment of inertia Conclusions on the moment of inertia of the movement organ are pulled. For example, from a predetermined angular velocity, a deceleration of the movement organ without activating the brake unit once with and once without additional mass moment of inertia be evaluated. Also possible is a defined energy input via a drive unit for Determination of the mass moment of inertia.

According to a further embodiment of the invention, in addition to detecting the braking power of the brake unit, the effectiveness of a freewheel in the chain of action between the exercising person and the movement organ is checked at least in partial operating areas. If such a freewheel is effective, this means that no power is transmitted via the chain of action and thus the power provided by the exercising person is zero, is constant or correlates only with a power to move the chain of action ("empty motion"). A monitoring of the freewheel can be done by monitoring the effectiveness or switching positions of the mechanical elements of the freewheel itself. A particularly simple monitoring of the freewheel is given by comparing the angular velocity of the flywheel and the angular velocity of the actuator for the person exercising, for example, the angular velocity of a pedal or a crank, since the aforementioned angular velocities for ineffective freewheel on the transmission ratios of the chain of action are related while for an activation of the freewheel the ratio of the angular velocity of the motor and the angular velocity of the actuator changes. Thus, if an activation of the freewheel is detected, it is recognized according to the invention that the power applied by the exercising person no longer corresponds to the power in the brake unit derived braking power correlated. In this case, the power can be set to 0, a constant, low power can be assumed or switched over to another power calculation via the detection of the processes in the action chain. For example, after such a switchover, a power loss in the chain of action can continue to be taken into account.

advantageous Further developments of the invention will become apparent from the claims, the Description and the drawings. The in the introduction to the description advantages of features and combinations of several Features are merely exemplary and may be alternative or cumulative come into effect, without the benefits of mandatory embodiments of the invention must be achieved. Other features are the drawings - in particular the illustrated Geometries and the relative dimensions of several components to each other as well as their relative arrangement and operative connection - can be seen. The combination of features of different embodiments the invention or features of different claims is also different from the ones chosen The antecedents of the claims possible and is hereby stimulated. This also applies to such features as in separate drawings are shown or in their description to be named. These features can be combined with features of different claims. As well can in the claims listed Features for more embodiments the invention omitted.

BRIEF DESCRIPTION OF THE FIGURES

in the The invention is described below with reference to the figures preferred embodiments further explained and described.

1 shows a schematic structure of a training device with peripheral devices for use of the method according to the invention.

2 shows a calibration method, which can be used for a method according to the invention for operating a training device.

3 shows an alternative or cumulative calibration method, which can be used for the inventive method for operating a training device.

DESCRIPTION OF THE FIGURES

The Invention is applicable in connection with any stationary exercise device, which has a movement organ and a brake unit. For example this is a rowing trainer or a training device for cycling with a flywheel or a powered rear wheel one Wheel. By way of example in the figures, the application of the invention on a training device for the Cycling without this being the use of the invention for more training equipment restrict should.

1 shows a training device 1 for cycling, where a foot 2 on a pedal 3 exerts a force, causing in connection with the rotation of the pedal 3 to do a work on a crank axle and performance is provided. The pedal 3 is mounted on a crank in a bottom bracket, in the power loss 4 is generated due to friction or hydrodynamic losses. The pedal 3 drives a drive wheel via the crank 5 on, which is designed for example as a drive sprocket or as a drive pulley. About a traction device 6 For example, a chain or a belt, the drive power is a driven wheel 7 transferred, which in turn the drive power, possibly with the interposition of a freewheel, to a motor organ 8th passes. power loss 9 is in the range of a bearing for the output gear 7 and the motor organ 8th and possibly generated by a freewheel. Further power loss 10 can be in the range of the chain 6 be generated. The movement organ 8th is in operative connection with a brake unit 11 , in accordance with an imposition 12 a brake 13 is pressed. It may be in the brake unit 11 additional power loss 14 generated.

In the training device 1 is through a sensor 15 in the area of the pedal 3 or contrary to 1 in the area of the bottom bracket 4 or the drive wheel 5 determines the force applied by the exercising person and a control or regulation unit 16 (hereinafter control unit) supplied. Alternatively or cumulatively takes place in the region of the traction means a detection of the force in the traction means via a sensor 17 then the control unit 16 is supplied.

Alternatively or additionally, the sensor 15 and the sensor 17 detect a velocity or angular velocity or other kinematic magnitude. A sensor 18 detects a kinematic size of the motor 8th For example, a distance traveled or angle, a speed or angular velocity or an acceleration or angular acceleration, the control unit 16 is supplied. In the brake unit 11 via a sensor 19 a detection of a correlated with the achieved braking effect signal, which the control unit 16 is supplied. The control unit 16 controls via an admission 12 the brake 13 at.

The control unit 16 communicates with a storage unit 20 in the example of the control unit 16 captured and / or calculated parameters, functions or maps can be stored and retrieved.

Furthermore, the control unit acts on 16 an output unit 21 in which information can be provided to the exercising person during or after completion of the training. The output unit is, for example, a monitor or a printer.

A communication of the exercising person with the control unit 16 is via a user interface 22 before, during and after training possible.

With regard to further design possibilities of the training device 1 and the peripheral devices is referred to the above-mentioned prior art. With regard to the peripheral devices and their networking with each other and the design of the computer structure, reference is made, for example, to the relevant disclosure contained in the patent application US 2003/0181293 A1.

P_T

die Leistung der von der trainierenden Person an dem Pedal 3 aufgebrachten Leistung,

P_V

die in dem Trainingsgerät erzeugte Verlustleistung, beispielsweise die Verlustleistungen 4, 9, 10, 14, und

P_B

die Leistung zur Herbeiführung einer Beschleunigung und P_BR die von der Bremse 13 abgeleitete Leistung,

so stellt die folgende Gleichung eine gute Approximation der Bilanz der Leistungsanteile in dem Trainingsgerät 1 dar: PT = PBR + PB + PV Designated

P _T

the performance of the person exercising on the pedal 3 applied power,

P _V

the power loss generated in the training device, such as the power losses 4 . 9 . 10 . 14 , and

P _B

the power to bring about acceleration and P _BR the brake 13 derived power,

Thus, the following equation provides a good approximation of the balance of power components in the exerciser 1 represents: P T = P BR + P B + P V

2 shows a method for approximating the power P _V in a first calibration method, which is used before training. After a start or reset of the control unit 16 is in a process step 23 the motor organ 8th Power supplied until this reaches a defined angular velocity, which, for example, by the sensor 18 in connection with the control unit 16 is monitored and upon reaching the target speed, a corresponding display on the output unit 21 generated. The power supply is for example by a person on the pedal 3 applied or by an external drive device.

When reaching the target speed is in one step 24 the power supply is disabled and the actual calibration procedure begins. Both during the process step 23 as well as for the following process step is an admission 12 the brake 13 such that a minimal or no braking effect is generated.

In one process step 25 becomes the kinetic energy of the motor organ 8th For example, by detecting the angular velocity through the sensor 19 , squared with the mass moment of inertia J of the motor 8th in the control unit 16 is converted to an energy, with the reduction of the angular velocity of the motor organ 8th E _{kin, 8} (t, ω, ...) as a function of time, the angular velocity, ... recorded with e kin, 8 = 0.5 Jω 2 . from which immediately the power loss 14 and - depending on the coupling of the further chain of action - the power losses 4 . 9 and 10 can be determined. For this purpose, in particular, a derivative of the detected energy signal or calculated energy signal after the time or a detection of the time change of the energy signal. The following applies: P V (t, ω, ...) = d / dt (E kin, 8 (t, ω, ...)).

Result of the step 25 may be a temporary value, a mean value, or a total power loss value. In an alternative embodiment, an evaluation takes place in each case for individual velocities or speed intervals, so that the power loss as a function of the angular velocity of the movement organ, by the sensor 19 is detected, can be determined.

In one process step 26 the stored data, for example the power loss as a function of the speed in a map, is stored in the memory unit 20 , From the storage unit 20 are the data obtained during the training of the control unit 16 available to determine the performance applied by the exercising person.

In a second calibration according to 3 Initially, a start or a reset of the control unit 16 for carrying out the second calibration method. Following this is, according to process step 23 in a procedural step 27 the organ of movement 8th brought to an initial energy, in particular a predefined speed.

In one process step 28 the actual start of the calibration process takes place. This takes place initially under defined loading of the brake se in one process step 29 by the control device 16 , Due to the braking effect and the power loss, the angular velocity of the motor organ is reduced 8th , wherein during this change the application of the brake 13 in a process step 30 through the control unit 16 is kept constant or can be varied according to a predetermined course. In the process step 31 is in the control unit 16 a power balance, the power loss as a result of the first calibration according to 2 can be obtained so that P _{V is} known. It thus applies: P BR = P V + d / dt (E kin, 8 )

Will the kinetic energy e kin, 8 = 0.5 Jω 2 from the angular velocity of the motor 8th and the moment of inertia of the motor 8th determined, the braking effect, for example, depending on the application of the brake according to method step 30 and / or in dependence on the angular velocity of the movement organ 8th , are determined and in the storage unit 20 be stored.

If, in a later training, the action on the pedal is performed by the exercising person, the power applied by the exercising person can be determined from the above-mentioned power balance, the acceleration power being derived from the time derivative of the kinetic energy of the movement organ 8th can be calculated. This results in a determination of the performance of the exercising person with increased accuracy over the prior art.

In the event that in another calibration method, the moment of inertia J of the movement organ 8th , if necessary, with other components of the chain of action to be determined, this can for example by generating a defined force in the region of the pedal 3 take place, over the height of which the pedal is actuated, and the force a potential energy can be determined, which - deducting the power loss - the movement organ 8th is fed without the brake 13 is effective. About the equation e kin = E pot = F · h = 0.5 Jω 2 can with a measurement of the angular velocity of the motor organ 8th the mass moment of inertia can be determined. Alternatively, it is possible to use the calibration method according to 2 once with the movement organ 8th and once with the movement organ 8th perform with an additional moment of inertia, resulting in two determinations that include the power loss and the moment of inertia as unknown and thus from both the power loss and the moment of inertia in the control unit 16 can be calculated.

In the case, that losses are recorded as a function of speed in a calibration procedure can, can these are converted into angular velocity dependence, then for oscillating or changeable Angular velocity gradients during the Training can be used.

The Calibration method according to the invention can lead to the advantage that sensors for a Detecting the braking power can be used in the brake unit can, to the opposite Sensors in the training devices known per se reduced requirements have to be asked with regard to the scattering of the sensors of different training devices and / or of nonlinearity the sensors, over there the calibration detects the scatter and / or nonlinearity and appropriately considered can be. This allows sensors and find a brake unit with significantly reduced costs.

The addressed consideration the effectiveness of a freewheel is according to a preferred embodiment the invention possible but due to the inventive design not mandatory. In the method according to the invention can be determined as a function of speed as a result of the calibration become. Will while an operation of the training device may be provided by a user less or no performance this from the difference or summation of the total power below consideration the discharged at the brake unit Braking power, the power taken from the flywheel and the Speed dependent Losses are recorded. For the case of an effectiveness of a freewheel leads to such a calculation method to a user-applied power that is about zero is. Thus, even without detection of the effectiveness of a freewheel the power applied by the user is well approximated. measurement error can however, in addition be excluded by that for a special embodiment the effectiveness of the freewheel is recorded and the low value the determined achievement for a Efficiency of the freewheel is set to exactly zero.

A deviation from the exact, performed by the user power in the amount of zero results for the inventive method under certain circumstances in that the power loss for the Wirk sity of the freewheel is increased. Such deviations can be detected by detecting the effectiveness of the freewheel. The aforementioned deviations do not occur or to a lesser extent when the crank of a bicycle is partially or completely moved.

A Detection of free-wheeling activity is in the process of the invention still possible from a sum or difference: Is the discharged at the brake unit Power greater than the power that is taken from the flywheel, so is the Freewheel not active. On the other hand, is the power dissipated at the brake unit Less than the power taken from the flywheel, reduced dependent on any speed Losses (without consideration freewheeling losses), the freewheel is active.

1

exerciser

2

foot

3

pedal

4

power loss

5

drive wheel

6

traction means

7

output gear

8th

musculoskeletal

9

power loss

10

power loss

11

brake unit

12

admission

13

brake

14

power loss

15

sensor

16

control unit

17

sensor

18

sensor

19

sensor

20

storage unit

21

output unit

22

user interface

23

step

24

step

25

step

26

step

27

step

28

step

29

step

30

step

31

step

32

step

Claims (14)

Method for operating a stationary training device ( 1 ), the training device ( 1 ) - a motor organ ( 8th ), to which power is applied (P _T ) by a person exercising, and - a brake unit ( 11 ), by means of which power (P _BR ) from the motor ( 8th ) is derived, with the following repetitive during the training process steps: a) detection of the current of the brake unit ( 11 ) derived power (P _BR ), b) determination of an acceleration power (P _B ) in the course of a change in the speed of the motor organ ( 8th ) by the exercising person c) approximation of the power applied by the exercising person (P _T ) taking into account - the detected by the braking unit ( 11 ) derived power (P _BR ) and - the specific acceleration power (P _B ) in the training device ( 1 ). A method according to claim 1, characterized in that a detection of the power loss (P _V ; 4 . 9 . 10 . 14 ) in the training device ( 1 ) and an approximation of the power applied by the exercising person (P _T ) taking into account the specific power loss (P _V ) in the training device ( 1 ) he follows. A method according to claim 1 or 2, characterized in that the acceleration power (P _B ) is detected or approximated as a time signal, for discrete times or as integral or average acceleration power for a period. Method according to claims 1, 2 and 3, characterized in that for an approximation of the power applied by the exercising person (P _T ) in addition to the detected by the brake unit ( 11 ) derived power (P _BR ) both the acceleration power (P _B ) and the power loss (P _V ) are taken into account. Method according to one of the preceding claims, characterized in that at least one operating variable is detected metrologically and the braking power (P _BR ), the acceleration power (P _B ) and / or the power loss (P _V ) as a function or from a map of the at least one operating variable is at least approximated. Method according to one of the preceding claims, characterized in that prior to a training start a calibration is carried out to obtain knowledge, which during training for detecting the braking power (P _BR ), for determining the power loss (P _V ) and / or for determining the acceleration power (P _B ) can be used. A method according to claim 6, characterized in that for a calibration energy in the Motor organ ( 8th ) and a calibration for determining the power loss (P _V ) during a dissipation of energy with the brake unit deactivated ( 11 ) he follows. A method according to claim 7, characterized in that the power loss (P _V ) is determined depending on the speed or angular velocity dependent. A method according to claim 6, characterized in that energy for a calibration in the motor organ ( 8th ) and during a degradation of energy by the activated brake unit ( 11 ) a braking power (P _BR ) is detected. A method according to claim 9, characterized in that the braking power (P _BR ) is detected speed-dependent or angular speed-dependent. A method according to claim 9 or 10, characterized in that during the calibration at least one operating variable (admission 12 ) of the brake unit ( 11 ) is changed. Method according to one of claims 6 to 8 and one of claims 9 to 11, characterized in that in a calibration step according to one of claims 6 to 8, a calibration of the power loss (P _V ) takes place (method steps 23 to 26 ) and then in a further calibration step, a calibration of the braking power (P _BR ) takes place (method steps 27 to 32 ), wherein the calibration of the braking power (P _BR ), the results of the calibration of the power loss (P _V ) are taken into account. Method according to one of the preceding claims, characterized in that in a calibration step, the mass moment of inertia of the movement organ ( 8th ) is detected. Method according to one of claims 1 to 13, characterized in that a) a detection of the effectiveness of a freewheel in the chain of action between the exercising person and the movement organ ( 8th ) and b) an approximation of the power (P _T ) applied by the exercising person takes place, for which purpose the power supplied by the braking unit ( 11 ) derived power (P _BR ) is taken into account only in those sub-operating areas in which the freewheel is not effective.