EP2716330A1 - Stationary exercise bicycle - Google Patents

Abstract

The stationary exercise bike has a foot pedal mechanism (2), which is coupled with a flywheel (5) by a gear ratio, and a magnetic braking device (8), which interacts with the flywheel and is altered in its braking effect, and a calculation device (13) with an associated display device (14). A calibration table is placed in the calculation device containing multiple defined brake device adjustments. The actual-running time of the flywheel is determined during a given reference adjustment of the brake device for calibration once by a measuring device (10) or the calculation device. An independent claim is included for a method for calibrating the performance indication of a stationary exercise bike determined by a calculation device.

Description

The invention relates to a stationary exercise bike comprising a pedal crank mechanism, which is coupled via a translation with a flywheel, a magnetic braking device which cooperates with the flywheel and is variable in their braking effect, and a computing device with associated display device.

Such stationary exercise bikes, also called Indoorcycle, enjoy great popularity both in the field of gyms as well as in the private sector. The trainee has the opportunity to actively cycle, with the possibility of adjusting the load individually via an adjustable magnetic brake device. This magnetic braking device cooperates with known training wheels with a flywheel, which is moved over the exercising actuated Tretkuppelmechanismus and a translation. The gear ratio of Tretkuppelmechanismus to flywheel, for example, be 1:10. Depending on the size of the set braking resistor, so as the braking device is set by the trainees, designed by the trainee power to be provided to move the flywheel or a specific flywheel speed or a corresponding pedal crank speed to to reach. About a computing device with associated display device, usually a sufficiently large display can now be given to the trainees information about the current performance to be performed, that is, that on the display device, a power indicator is output in watts. In the calculation of this power display is on the one hand, the set braking resistor, which is crucial to the height of the flywheel rotation opposite resistance to be overcome by the trainee, as well as the speed, for example, the pedal mechanism.

Sometimes, however, the actual braking resistance, so the resistance that is opposite to the flywheel movement and the trainees must ultimately overcome by power input, another, as he has the appropriate Braking device setting is displayed. Because in the real braking resistor are a number of design-related influencing factors that affect him. To mention here is, for example, the power loss of the drive by a varying over time belt tension. In known wheels of the pedal crank mechanism is usually coupled via a belt or a chain with the flywheel. This belt or the chain is subject over time to a certain change or wear, it can lead to a although small belt or chain elongation, as well as the power coupling eg between belt and Tretkuppelmechanismus one hand respectively flywheel on the other hand may vary due to a belt material change. Furthermore, frictional resistance within the sliding or rolling bearings involved should be mentioned, which go into the power loss of the drive, which in turn results in a change in the effective braking effect. Furthermore, the material properties and quality of the flywheel material used, usually aluminum, may be mentioned as mechanical influencing factors. Also, any tolerances in the distance of or the brake magnet of the braking device, which brake magnets are moved radially to the variation of the braking effect relative to the flywheel, have an influence on the effective braking effect, as well as any tolerances of the magnetic field strength of the brake magnet or itself.

This results in the problem that the displayed on the display device and felt by the trainee real braking resistor at any speed and brake adjustment over a large number of series-produced training wheels varies, therefore, the displayed setting of the braking device does not match the real braking resistor. However, since this brake adjustment is included in the determination of the power display, it follows that consequently the given power display can be faulty. However, according to normative specifications, this power display may only fluctuate within certain tolerances. If these are not adhered to, costly repairs to the drive and brake system are required. This means that consequently determined in the laboratory braking resistors based on defined brake settings at certain crank speeds are not given readily reproducible on the series-produced training wheels.

The invention is thus based on the problem of specifying a stationary training wheel, which is improved in contrast and offers a possibility for a correct consideration of the real braking resistance within the power display determination.

To solve this problem is provided according to the invention in a stationary training wheel of the type mentioned that a calibration table is stored in the arithmetic unit, containing a plurality of defined braking device settings, which reference flow time of not loaded via the pedal mechanism flywheel regarding the speed decrease from a first speed to a associated with the second speed, wherein for calibration at least once by means of a measuring device or the computing device, the actual flow time of the flywheel determined at a given target setting of the braking device and based on the measured actual flow time by comparison with the reference flow times, the runtime-specific actual setting determines the braking device and in the case of non-coincidence of actual setting and target setting information about the actual setting on the display device can be output.

The invention is based on the fundamental finding that all design-related mechanical or drive and braking system-side influencing factors are ultimately reflected in the rotational behavior of the flywheel. This knowledge is now used to give a calibration possibility to detect any non-compliance of a set by the user target setting of the braking device with an actual actual setting of the braking device, ie a falling apart of the real braking resistor with the set desired braking resistor and to be able to compensate accordingly, respectively, in the context of the determination of benefits.

For this purpose, a calibration table is stored in the exercise bike according to the invention. In this reference reference runout times of the flywheel are stored to several defined braking device settings. A reference run-out time is understood to be the time that the flywheel, which was previously driven via the pedal crank mechanism but no longer actively driven with the start of the time measurement, requires its speed to decrease from a first rotational speed to a second rotational speed. These reference run-off times are determined on a reference training wheel, which serves as the calibration reference for all subsequent series-built training wheels, to the several defined brake facility settings. These reference run-off times are ultimately the result of the given reference input variables on the reference training wheel, that is to say the circumstances within the drive and braking system of the reference training wheel, which are quasi as reference influencing factors. Each determined reference run-time is thus on the one hand dependent on these incoming influencing factors, but on the other hand, of course, but also on the specific, associated brake device setting.

These reference outflow times are now used within the calibration table as comparison times for corresponding actual outflow times of the series training wheel. For this purpose, it is necessary that for calibration of the trainees on the pedal mechanism drives the flywheel. After completion of the drive, the actual flow time of the flywheel is measured or determined via a corresponding measuring device (comprising a suitable computer or processor) or the computing device itself, which is then coupled to a measuring device that basically detects the wheel rotation, ie, the flow time. the flywheel of the exercise bike actually requires that its speed at a given target setting of the braking device in turn from the first speed to the second speed, with respect to which the reference run-out times were determined decreases.

The computing device is now able to determine via a pure comparison of the actual run-time with the given reference run-out times, in how far the given target setting of the brake device on the series-training bike correctly is, so therefore set on this a correct braking resistor respectively is displayed, as he was also given to the reference training wheel based on the determined actual run-time. Thus, if the actual run-out time coincides with a reference run-down time, which corresponds to the same reference setting of the brake device, as it is given as a setpoint setting on the standard wheel, within a certain tolerance interval, so there are ultimately no differences between series training bike and Given reference training wheel, which means that the display of the brake adjustment and thus the performance determination on the series training bike is correct and that corresponds to the reference training wheel.

If, however, the computing device determines that the actual run-down time with respect to the desired setting of the braking device does not coincide with the reference run-out time relative to the reference brake device setting, then the computing device checks to which other reference run-out time the actual run-out time corresponds or which she comes closest to her. If the actual run-out time is longer than the reference run-down time relative to the same brake device setting, the result is that the real brake drag is lower than the setpoint setting of the brake device indicates. The computing device now shows a somewhat lower brake device setting as the actual actual setting of the braking resistor, which therefore reproduces the real brake setting. In the opposite case, if the actual flow time is shorter than the reference flow time, then the real braking resistance and thus the real actual setting of the braking device is greater than the set by the user target setting, which is also displayed on the display device.

This means that in the end alone a comparison of the actual run-out time with the reference run-out time can determine how far the braking behavior of the series training bike corresponds to that of the reference exercise bike, or in which direction a difference exists and in which direction an adjustment must be made. This adaptation now leads to the fact that a correct determination of performance corresponding to the real behavior is possible. Because if the real actual braking resistance or the real braking behavior is known and corrected via the correction to the actual setting, the real braking resistance or the real actual setting of the determination of the power values can also be used as a basis.

These performance values can be recorded, for example, within the calibration table or assigned to it, in such a way that corresponding specific performance values are stored in turn for defined brake device settings, which the user can therefore select in principle, and for defined speed values, for example in the form of speeds of the pedal crank mechanism. Thus, if the defined braking device settings are plotted along the coordinate in tabular form, for example in the form of defined steps or percentage data relating to the braking effect, and along the abscissa are rpm values of the pedal (pedals), for example rising in the form of 5 rpm or 10 rpm min steps, this results in an extensive matrix which can be filled with concrete performance values, which in turn are determined at the reference training wheel. This means that for each adjustable braking resistor or each adjustable brake device setting and a corresponding actual speed, a specific power value is determined, which the exerciser must spend at the given braking resistor and the given speed to drive the flywheel. For integration over time, even if the speed varies, the corresponding power value can always be determined and integrated in order to arrive at a total power indication. Thus, in the calibration table, at defined speed values and defined brake settings, power values that the exerciser must spend at a given brake setup and speed to drive the flywheel are recorded or associated with the calibration table, wherein the automatic power calculation calculator is based on the given Braking device setting and speed is formed on the basis of the stored power values.

This means that on the one hand it is ensured on the one hand due to the calibration possibility according to the invention that the real braking resistor is always detected and as a result the given actual actual setting of the braking device is also detected and is displayed, on the other hand, but also in the context of later in the training operation performance determination, the corresponding performance values that are assigned to this real braking resistor or the correct braking resistor after calibration, are taken into account and consequently a correct power detection resulting from the calibration is possible.

As described, the exerciser has the ability to adjust the braking device defined, so consequently to change the braking resistance targeted. This can be done either by the braking effect in defined stages, preferably in at least 10 stages, between a maximum braking effect and no braking action is variable. There are, starting from a setting without any braking effect, given 10 levels 1 - 10, which can select the exercising, with the maximum braking effect would be at level 10. For each defined brake adjustment stage, and possibly also for stage 0, a reference run-out time is stored in the calibration table. If the actual flow time is known, and the comparison results in a difference to the reference flow time, the computing device searches for that reference flow time to which the actual flow time is closest. The assigned actual setting of the braking device is then transferred to the system. Of course, significantly more than 10 stages are adjustable, for example, 20 or 25 stages, about which the resolution with respect to the reference flow times or the assignment of the actual flow time to a reference flow time can be detected even more accurately.

Alternatively, it is also conceivable to be able to change the braking effect in 1% steps between 100% and 0% braking effect. This embodiment provides the maximum resolution of the brake setting in the form of 100 defined settings that can be selected by the user. For each percentage step, a defined reference run-time is given. Here, a very fine and defined correction can be made with regard to the brake device setting, after the actual outflow time can ultimately be compared with 100 reference outflow times and consequently a very accurate approximation of the actual outflow time to a given reference outflow time due to the fine breakdown of the reference Downtime can be found. Are so many brake device settings possible, there is also an extremely large number of setting-specific performance values that are entered in the matrix. With a breakdown of the brake settings in 100 steps and a subdivision of the rotational speed values with respect to the pedal mechanism in 10 rpm steps starting from 30 rpm to 130 rpm, a matrix of 100 × 11 = 1100 power values thus results. It is obvious that this can be done with an extremely accurate performance determination. If, for example, the speed is broken down into 5 rpm steps, the recorded power values almost double, an even finer breakdown is possible. A division into 1 rpm steps would result in a matrix with 100 × 110 = 11,000 power values, which allows a highly accurate power determination as a result of the finely divided speed splitting, especially as a result of the inventively provided, highly accurate detection of the flywheel speed and the resulting pedal crankshaft speed very accurately It can be recorded how long the trainee has driven with the respective pedaling speed, so that the respective power components can be detected and integrated in a time-exact manner over the training time based on speed.

Expediently, the measuring device or the computing device for determining an averaged actual flow time is formed on the basis of two determined in successive operations separate actual flow time for the same target setting of the braking device and for determining the actual setting on the basis of the averaged actual flow time. Within the scope of the calibration, according to this embodiment of the invention, an actual outflow time is determined at the same setpoint setting of the braking device at least twice; based on both actual outflow times, an averaged actual outflow time is determined. The trainee must therefore drive the flywheel twice to the first speed, after which the actual run-out time is determined twice without further stepping. This is for accuracy, as there are two defined actual run-out times, which are taken into account in the averaging. Of course, it would also be conceivable to carry out this process a third time, so that three actual outflow times are taken into account for averaging. Preferably, the actual outflow time is determined twice in a first setting of the braking device, and then twice again the specific actual outflow time with a changed second setting of the braking device determined. That is, the calibration is made with respect to two different brake device settings.

Essential for the invention training wheel is on the one hand to determine the speed to accurately detect the achievement of the first and second speed, as of course in particular the determination of the flow time. In order to make this possible in a simple manner, according to the invention, the flywheel is provided with a flywheel rotation past the stationary measuring device and thereby contactlessly detectable by the measuring device, in particular a magnetic element, wherein the measuring device or the computing device for determining the rotational speed and thus the first and the second Speed is formed. In addition, in the same unit, based on the speed detection, the measurement of the actual flow time take place, which begins with reaching the first speed and ends with reaching the second speed, including in the measuring device or the computing device, a corresponding timer o. like. is provided, which is triggered via the detected first and second speeds. The measuring device or the computing device, which are given in this case, the corresponding detection signals from the measuring device, so preferably detects both speed and flow time. If the registration is carried out by the measuring device, the actual expiry time is passed on to the computing device for further processing in the course of the comparison. As part of the calibration, ultimately only the actual flow time must be given to the computing device, since the actual flow time is indeed the flow time between two defined speeds, namely the first and the second speed. In the context of the calibration, only the actual run-out time is relevant as described above, it is the decisive, only parameter, over which the calibration takes place. The computing device now processes the actual run-out time in the given manner, it being understood that, should an averaging of two or more actual run-down times occur, this is done on the computing device side. In the context of normal training operation, so if no calibration is required, the measuring device of course communicates the continuously determined speed of the computing device, which then based on the given speed to which the stored power values are related (ie z. B. the crank speed) in conjunction with the braking device setting determines and outputs the power values. Due to the given translation between crank and flywheel very high flywheel speeds of several 100 U / min are given to well over 1000 U / min. This results in extremely short time intervals between two consecutively detected, one revolution indicating element runs, which are in the range of several 10 - 100 milliseconds, and these time intervals are detected to determine the actual speed of the flywheel, therefore, even small speed changes can be detected immediately, as each speed change is reflected directly in a change of the time interval. This allows a high-precision speed detection and thus a highly accurate detection of the actual flow time as a basis for the calibration according to the invention.

As described, a magnetic element can be provided as a flywheel-side element. As a sensor, then, e.g. a Hall sensor or a reed sensor can be used. Alternatively, e.g. an optical detection conceivable. As an element, then, e.g. a reflective element arranged on the flywheel, as a sensor would be a reflection light sensor, so provide an optical sensor, the device would therefore be designed in the manner of a light barrier. Basically, any measuring device is used, which allows the contactless detection of the flywheel rotation and the determination of the very short time intervals.

Conveniently, a corresponding calibration mode can be selected by the computing device, in which the computing device can be output via the display instructions to the user for driving the flywheel to at least the first speed and to terminate the further operation of the pedal crank mechanism. The user therefore has the option of selecting this calibration mode, whereby, of course, should the user not select the mode within certain time intervals, the computing device can also demand the calibration within defined time intervals, ie can obtain it automatically and prompt the user to do so can. He receives via the computing device appropriate instructions, This means that the calibration is carried out in a quasi-guided manner by telling him specifically what he has to do.

In addition to the stationary exercise bike itself, the invention further relates to a method for calibrating the ascertainable by means of a calculator power display a stationary exercise bike, wherein in the computing a calibration table is stored, containing a plurality of defined braking device settings, which reference run-off times of not loaded via the pedal mechanism flywheel regarding the Speed reduction of a defined first speed are assigned to a defined second speed, in which method at least once the user at a given, set by the user target setting of the braking device, the flywheel on the pedal crank mechanism of the exercise bike with continuous speed determination to a speed that at least the corresponds to first rotational speed, drives, after which the operation of the pedal crank mechanism is terminated and by means of a measuring device or the computing device the Is-flow time, which requires the flywheel for a drop from the first speed to the second speed, is measured, after which the actual setting of the braking device is determined based on the measured actual run-out time by comparison with the reference run-out times and in case of disagreement of actual Setting and target setting information about the actual setting on the display device can be output. The method according to the invention consequently provides for the use of a previously described exercise bike with a corresponding calibration table. In the context of the method according to the invention, the trainee must drive the flywheel at least to the first speed, then he ends the further pedaling. The measuring device now determines the actual flow time for the speed drop from the first to the second speed. The computing device, which is informed of the actual run-down time, now compares the actual run-down time with the reference run-out times stored in the calibration table and thus determines the actual setting of the brake device. If the actual run-out time matches a reference run-out time or an approximate match, it remains at the displayed brake device setting, that is to say that the setpoint setting set by the user ultimately corresponds to the real actual setting. In the event of a disagreement, that is, if the actual run-time is closer to a different reference run-time than that deposited for the corresponding user-selected brake device setting, the display is changed accordingly and the actual setting is displayed. This means that the display changes to the true brake setting. This true brake setting is then taken over in the further determination of the power values or the power values associated with this actual brake adjustment are taken into account in the integration for determining the power during the later training. As a result of the calibration, in the later training, of course, the target settings then selected by the user will correctly agree with the real settings, so that the correct power values are taken into account. In the calibration table, at defined speed values and defined brake settings, power values that the exerciser must spend at a given brake setup and speed to drive the flywheel are recorded or associated with the calibration table, wherein the calculator automatically adjusts the power depending on the given brake setup and speed determined based on the stored performance values.

Conveniently, the speed of the flywheel is brought to a value above the first speed, after which the operation of the pedal crank mechanism is terminated and the continuous measurement starts the time measurement with reaching the first speed. This first speed should be at least 100 rpm relative to the actual pedal crank speed, the difference to the second speed should be at least 30 rpm, preferably at least 50 rpm pedal crank speed. For example, the trainee is asked to pedal, receiving the clue to stop pedaling only when given, for example, a pedal crank speed of 110 rpm, which is determined from the flywheel speed and gear ratio. The speed is recorded continuously via the measuring device. As a result of the lack of power input, the flywheel and thus the theoretical pedal crank speed decreases. When reaching the first speed of 100 rpm, the time measurement begins, it ends, for example, when reaching the second speed of 50 U / min. Thus, the actual flow time is fixed, it is given to the computing device or from the house directly in the computing device, which then receives from the measuring device, the corresponding measurement signals relating to the detection of the flywheel-side element detected, the computer then continues the calibration.

In a further development of the invention it is provided that for detecting the rotational speed of the flywheel, a measuring device is used, comprising a flywheel arranged on the element, in particular a magnetic element and a stationary measuring element, which detects the thereby moved past him measuring element with each revolution of the flywheel and a generates the indicating signal, wherein the time between two consecutively given signals is detected for speed detection, wherein the determined time or the speed determined therefrom of the measurement of the actual flow time abutting and terminating parameters. The speed detection is therefore based on a high-resolution time detection, by the time is determined with high accuracy, which requires the flywheel for exactly one revolution. For this purpose, a measuring device is used which comprises only one arranged on the flywheel element, such as a magnetic element and a stationary measuring device, ie a suitable sensor, eg a Hall sensor. The sensor generates a signal each time the element rotates past it. Since only one element, ie, for example, only one magnetic element is provided, therefore, the time that has elapsed between two consecutive signals, exactly the time that the flywheel has needed for this one revolution (for example, two elements offset by exactly 180 ° on Flywheel provided, so would correspond to a time interval between two signals of half a revolution, from which can be easily calculated again the speed). This measured time is synonymous with the actual speed. Since the signals are continuously generated and consequently the lying between two signals times are detected, consequently, the actual speed can be determined very accurately, but so that the temporal speed curve, and thus concretely reaching the first speed at which the measurement of Actual flow time begins, as well as reaching the second speed at which the measurement of the actual flow time is stopped. As explained, the pedal crank speed translates Consequently, there is a high flywheel speed. Consequently, at high crank speed very high flywheel speeds are given, which are in the range of several 100 rev / min to well over 1000rpm, depending on the specific translation. As a result, there are very small time intervals between two consecutive signals, they are usually in the range of a few milliseconds. This is fundamental to extremely accurate speed sensing. Because of the high-resolution time recording with changes in the time intervals in the millisecond range, even minimal resulting speed changes can be detected. Consequently, the achievement of the first as well as the second speed can be detected very accurately, which in turn results in a highly accurate determination of the actual run-out time.

For example, given a gear ratio of 1:10, so turns at a crank speed of, for example 70 U / min, a flywheel speed of 700 rev / min. For example, be the first flywheel speed at which the measurement of the actual flow time should begin, 600 U / min. At 600 rpm, there are 100 ms between two detection signals generated on the sensor side. As soon as this time interval or a time interval which is only minimally greater than 100 ms, for example 101 ms, is detected, the actual outflow time measurement is triggered, ie the measured time interval serves as a trigger. As the flywheel expires, its speed continues to decrease, hence the measured time intervals continue to increase. If, for example, a speed of 60 rpm is defined as the second rotational speed at which the measurement of the actual run-out time is ended, this corresponds to a time interval of 1000 ms between two successive sensor signals. As soon as this time interval or even a minimally larger time interval is measured, for example of 1001 ms, this indicates that the lower second speed ending the measurement has been reached, the measurement of the actual run-down time is stopped. At different settings of the braking device, the actual flow times change inevitably, the greater the braking power, the shorter the actual flow time. Regardless of the selected setting, however, the actual run-out time can always be recorded with high precision, resulting from the high-resolution, highly accurate speed detection. The above values are only examples, of course, the translation can be arbitrarily different, resulting in different speeds, such as also the first and second speeds can be arbitrary. In the exercise bike according to the invention, therefore, such a measuring device or computing device is provided which performs in the manner described above, the time interval detection and thus speed detection and based on the determination of the actual flow time makes.

In this case, the process can be repeated at least once for the same target setting and based on the two measured actual flow times an average actual flow time can be determined, based on which the determination of the actual setting is made by comparing with the reference flow times. This means that the calibration is based on two separate actual run-out times. Of course, it would be conceivable to determine three or more such actual flow times in order to have an even broader averaging base.

Alternatively or in addition to this, the process can be repeated at least once in the case of a changed second setpoint setting of the braking device, the determination of the respective actual setting taking place on the basis of each measured actual outflow time or any particular averaged actual outflow time. In this case, the calibration pass is made a first time with a first setpoint setting and a possible new actual setting is displayed. Then the trainee is asked to repeat the calibration, whereby a second target setting must be selected in advance, which deviates from the first target setting. If the first calibration was successful, the actual outflow time determined for this second setpoint setting would now have to correspond approximately exactly to the assigned reference outflow time. This means that this second pass can be used to check whether the first calibration was successful. If this is not the case, and if an outflow time difference should be detected again during this second calibration procedure, then it can be corrected again. It is conceivable to repeat this process, which should be corrected again in the second round, a third time to make sure that now the calibration was correct.

In this case, the first actual setting may be that setting in which no braking effect is given, and the second actual setting may be that in which the maximum braking effect is given. Here, only the influence of the drive train is taken into account in the first actual setting, since the brake is not effective. In the second round, the influence of both the powertrain and the then effective braking device is taken into account. This also serves to increase the measurement accuracy.

Finally, by means of the measuring device according to the invention, both the rotational speed of the flywheel, and possibly calculated from the pedal crank speed, as well as the actual flow time can be determined, that is, with a measuring device both parameters can be determined. This assumes that the measuring device itself is provided with a suitable processor, that is designed as a stand-alone computer. Alternatively, the measuring device can also be designed only as a pure sensor device which supplies the flywheel rotation-specific signal to the computing device, which then carries out all data processing operations and time determinations and comparisons, etc.

Fig. 1

eine Prinzipdarstellung eines erfindungsgemäßen Trainingsrads,

Fig. 2

ein Diagramm zur Darstellung des Verhältnisses von Verlustleistung zur Auslaufzeit,

Fig. 3

ein Diagramm zur Darstellung des Verhältnisses von Bremseinrichtungseinstellung zu Auslaufzeit, und

Fig. 4

eine Prinzipdarstellung einer Kalibriertabelle mit zugeordneten Leistungswerten.

Further advantages, features and details of the invention will become apparent from the embodiment described below and with reference to the drawings. Showing:

Fig. 1

a schematic diagram of a training wheel according to the invention,

Fig. 2

a diagram illustrating the ratio of power loss to the flow time,

Fig. 3

a diagram showing the ratio of Bremseinrichtungseinstellung to flow time, and

Fig. 4

a schematic diagram of a calibration table with associated power values.

Fig. 1 shows a schematic diagram of a stationary exercise bike according to the invention, in which case only the essential components are shown. Provided on the one hand a pedal crank mechanism 2 comprising two pedals 3, which are to be operated by the trainees. The pedal crank mechanism 2 is coupled to a flywheel 5 via a belt 4. Since the provided on the pedal crank mechanism 2 pulley 6 is significantly larger than the pulley 7 on the flywheel 5, therefore, a translation is given. One revolution of the pulley 6, thus a complete 360 ° rotation cycle, leads to several revolutions of the flywheel 7. Depending on the ratio of the diameter of the pulleys 6, 7, a defined gear ratio can be set, for example, a gear ratio of 1:10. That is, a rotation of the pulley 6 to ten rotations of the pulley 7 and thus a 360 ° -Tretbewegung lead to ten rotations of the flywheel 5.

Assigned to the flywheel 5 is a braking device 8 comprising here exemplarily shown a magnet 9, wherein usually two such magnets 9, which are positioned on both sides of the pulley 5 and synchronously in their distance respectively cover ratio to the flywheel 5 can be adjusted by radial movement, are provided. As a magnet, a permanent magnet is usually used. In the example shown, the brake magnet 9 is radially movable relative to the flywheel 5, as shown by the double arrow. By way of this, the distance S of the magnet 9 to the flywheel 5 can be changed. The further away the magnet 9 is positioned to the flywheel 5, the lower its braking effect, the closer it is to the flywheel 5 and consequently the smaller S, the greater the braking effect. Are e.g. two magnets arranged laterally of the flywheel and radially laterally displaceable thereto, the lateral overlap, for example, changes. between 0% (ie no overlap) and 100% (ie full overlap). The higher the degree of coverage, the greater the eddy current brake effect, and vice versa.

Also provided is a measuring device 10, which on the one hand serves to detect the rotational speed of the flywheel 5, on the other hand, for detecting the actual flow time. For this purpose, a magnetic element 11 is on the flywheel 5 provided on the measuring device 10, a corresponding sensor 12, for example, a Hall sensor, is provided. Each time the magnetic element 11 rotating with the flywheel 5 is moved past the sensor 12, the sensor 12 detects a corresponding signal. From the time interval two consecutively recorded signals, ie the duration of a single revolution, the measuring device 10 can thus determine exactly the speed of the flywheel 5. In this case, the actual time and therefore speed as well as outflow time determination can take place either directly on the part of the measuring device near the flywheel, if it comprises a computing device or processor designed for this purpose. Alternatively, the time and thus speed as well as Auslaufzeitermittlung also take place in the below-described computing device 13, if this has the actual data processing processor, the computing device 13 would then be part of the measuring device for speed and Auslaufzeitermittlung; the flywheel near measuring device is used in this case only as a pure sensor, which gives a signal pulse to the computing device with each pass of the magnetic element and thus each disk rotation, which then processes the incoming signal pulses accordingly. Since the flywheel due to the given translation of the crank on the flywheel at a higher towering number very fast, ie at high speed (usually from several 100 rev / min to more than 1000 rev / min) rotates, the measuring device and / or the computing device designed for the corresponding high-frequency signal acquisition or data processing.

Furthermore, as stated, the measuring device 10 can also determine the actual flow time, ie the time required for the flywheel 5, which is not driven further by the pedal crank mechanism 2, to move from a first, e.g. B. related to the pedal mechanism speed, for example, 100 U / min to a second speed, for example 50 U / min, drop. Since the measuring device 10 detects the rotational speed with high precision, consequently, the actual flow time can be accurately recorded.

Also provided is a computing device 13, which on the one hand by the measuring device 10, the detected speed values as well as the detected actual flow time in Calibration be given. On the other hand, the computational side of the user z. B. selected via a trained as a touch screen display device 14 setting the braking device 8, which can be adjusted in corresponding defined steps. For example, the braking device 8 can be brought into ten defined positions, so that there are therefore ten different distances S. It is also conceivable, however, an even finer resolution, for example, by the braking device percentage between 0% - 100% braking effect, equivalent to 100 defined, very finely divided distance values S by entering the desired% value on the display device 14 can be adjusted. The mechanical adjustment via a corresponding, via a suitable, not shown here in detail drive in conjunction with a precise position detection.

In any case, on the part of the computing device 13 on the one hand information about the selected target setting of the braking device 8, on the other hand information about the measured actual flow time when the calibration is carried out, as well as in normal operation, the speed.

Also associated with the computing device 13 is the display device 14, for example a color display which is fastened to the handlebar of the exercise bike 1. Corresponding information is visualized on this display device 14, including a power display, as well as the given desired brake device setting. This can the exerciser as described by appropriate actuation of a mechanical actuator or entering a desired brake setting on the display device 14, z. As a touch screen, enter, whereupon the corresponding position of the braking device 8 and the relative position of the magnet 9 is set to the flywheel. The performance values determined the computing device 13 in normal operation based on the given speed, detected by the measuring device 10, as of course on the basis of the given training period respectively the time how long the corresponding speed is driven, and of course, taking into account the given target setting of the braking device 8, since this is of course an essential element of the applied power. Because about the braking device 8, the braking resistance, ie the resistance which is opposite to the rotation of the flywheel 5 and which is to be overcome by the exerciser via the pedal crank mechanism 2, is defined. For this purpose, a multiplicity of power values, which are assigned to the different brake device settings, are stored in the computing device 13 in the form of a corresponding table. These performance values, which will be discussed in detail below, are determined on the one hand with regard to the defined braking device setting, but on the other hand also at defined speed levels z. B. based on the pedal crank mechanism 2, so that consequently there are a plurality of separate power values, which the computing device 13 detects and integrates over the training time to determine a corresponding power value.

In the context of the calibration method according to the invention, at a reference training wheel to the defined settings of the braking device 8 corresponding reference flow times for the decrease of the flywheel speed or the pedal crank speed (which is in a fixed ratio to the directly detected flywheel speed) were determined from the first to the second speed. Furthermore, for all brake device settings related to defined speeds z. B. determined corresponding performance values on the crank mechanism. These entire values are stored in the computing device 13 in the form of a calibration or performance value table. The reference run times are now used in conjunction with the associated brake setup settings as part of the calibration. Alternatively, the corresponding values can also be stored in the form of specific calculated data algorithms which define the course of the value in relation to a reference value.

The rotation work is introduced via the pedal crank mechanism 2 and the flywheel 5 in the overall system or by stepping the crank mechanism 2, the flywheel 5 is accelerated to a certain angular velocity or speed. The change in the rotational work of a physical inertia system is described as follows: $$\mathrm{\Delta }{W}_{\mathit{red}}=\frac{\mathrm{<figure-callout\; id="2"\; label="J"\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">J</figure-callout>}}{2}\left({{\mathrm{<figure-callout\; id="2"\; label="\omega "\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">\omega </figure-callout>}}_2}^2-{{\mathrm{<figure-callout\; id="1"\; label="\omega "\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">\omega </figure-callout>}}_1}^2\right)$$

ΔW_rot

= Änderung der Rotationsarbeit

J

= Massenträgheitsmoment des Antriebssystems aus Tretkurbelmechanismus 2 und Schwungrad 5

ω

= Winkelgeschwindigkeit des Schwungrads

Here are:

ΔW _red

= Change of the rotation work

J

= Mass moment of inertia of the drive system of pedal crank mechanism 2 and flywheel 5

ω

= Angular velocity of the flywheel

After a certain speed or angular velocity ω _{2 has been} reached, the initiation of the rotational work is stopped, so it is no longer continued. Due to friction losses in connection with the action of the braking device 8, the overall system, in particular the flywheel 5, which is in rotation now reduces its rotational speed or its angular velocity to a specific value ω ₁ , for which a certain flow time, namely the actual flow time, is required. This actual run-out time is thus determined as a time difference between the rotational speeds U ₂ and U ₁ or, based on the above formula, the angular velocities ω ₂ and ω ₁ by means of the high-resolution measuring device 10.

mit der Rotationsleistung, die sich ermittelt zu $${\mathit{P}}_{\mathit{rot}}=\frac{{\mathit{W}}_{\mathit{rot}}}{\mathit{t}}$$

mit

P_rot

= Rotationsleistung

t

= Zeit

kann nun mittels eines Referenz-Prüfstandes das Referenztrainingsrad komplett vermessen und kalibriert werden. Hierbei werden folgende Daten ermittelt:

S_Bremse

= Einstellung der Bremseinrichtung (Position des Bremsmagneten relativ zur Schwungscheibe)

Ist-Auslaufzeit = zeitliche Differenz zwischen erster Drehzahl und zweiter Drehzahl

P

= momentane Verlustleistung in Watt bezogen auf eine bestimmte Drehzahl des Tretkurbelmechanismus 2

Due to the physical context of the rotational work according to $$W_{\mathit{red}}=\frac{J{\mathrm{<figure-callout\; id="2"\; label="\omega "\; filenames="imgf0001.png,imgf0002.png"\; state="\{\{state\}\}">\omega </figure-callout>}}^2}{2}$$

with the rotational power, which is determined too $${\mathit{P}}_{\mathit{red}}=\frac{{\mathit{W}}_{\mathit{red}}}{\mathit{t}}$$

With

P _red

= Rotational power

t

= Time

The reference training wheel can now be completely measured and calibrated by means of a reference test bench. The following data is determined here:

S _brake

= Adjustment of the brake device (position of the brake magnet relative to the flywheel)

Actual flow time = time difference between first speed and second speed

P

= instantaneous power loss in watts relative to a certain speed of the pedal crank mechanism 2

These values can be entered in a corresponding table as shown in Fig. 4 is shown and as described in detail below. This table can then be used to calibrate series training wheels.

The Figures 2 and 3 show in the form of diagrams, determined on a reference training wheel, the corresponding relationships between the power loss, which is equivalent to the power that has to apply the trainees for driving the flywheel 5 relative to a certain speed at a particular braking device setting, based on the Reference runtime ( Fig. 2 ) and the ratio of the setting of the braking device relative to the reference flow time ( Fig. 3 ).

In Fig. 2 along the abscissa the reference flow time in [s] is shown along the ordinate the power loss in [W]. The power is shown for three different speed levels. The curve I shows the performance over the flow time at a pedal speed of 40 rev / min, the curve II the course of the power loss at a pedal speed of 80 rev / min and the curve III the course of the power at a pedal speed of 120 rev / min, each at the same, unchanged position of the magnet to the flywheel.

As can be seen, the power loss, ie the power that is dissipated via the drive and brake system during coasting, decreases in each case the greater the flow time.

Fig. 3 shows the relationship of the reference flow time, which in turn is shown along the abscissa in [s], based on the Bremseinrichtungseinstellung, which is shown here only in the form of a total of ten adjustment stages, the level 0 means no braking effect and the stage 10 maximum braking effect , that is, that here the brake magnet 9 is positioned in the closest possible position to the flywheel 5.

As can be seen, the flow time increases more and more, the further the brake magnet 9 is removed from the flywheel 5, thus the lower the braking effect.

In the Figures 2 and 3 In each case, the respective power loss and the respective brake device setting are specified for a reference run-down time of 9 s. If the flow time is 9 s, the braking device is at setting 4. The power loss, which is assigned here, for example, at a revolution of 120 rpm, is for example about 67 watts.

A table to be used with reference to the reference training wheel to be used as a calibration table for subsequent standard training wheels, as described in US Pat Figures 2 and 3 Thus, for example, as follows: S _brake Ref. Spout [s] P (40 rpm) [W] P (80 rpm) [W] P (120rpm) [W] 0 15.62 8th 23 41 1 14.36 9 24.5 45 2 12.62 10 28 51 3 10.78 11 31.5 58 4 8.97 13 36.5 67.5 5 7.27 16 44.5 82 6 5.89 19 54.5 99 7 4.73 23 68.5 125 8th 3.79 29 83.5 150 9 3.13 36 101.5 178 10 2.66 43 123.5 221

Obviously, the corresponding in the Figures 2 and 3 highlighted reference run-out time of 9 s with the power loss of 67.5 W given in the table, where the measured reference run-out time is given as an example 8.97. The brake setting corresponding to the reference deceleration time of 9 s is level 4, as shown in the calibration table.

Fig. 4 finally shows a more detailed table, in which on the one hand the calibration table comprising the brake device settings is included with associated reference flow times, on the other hand in addition to the related to the speed of the pedal crank power values are entered. While in the exemplary calibration table given above, the brake settings are indicated in stages 0-10, where each stage indicates, for example, the respective distance of the brake magnet and stage 10 defines the minimum distance in millimeters and stage 0 the maximum distance in millimeters the in Fig. 4 shown table as braking device settings percentage levels based on the respective maximum braking effect indicated. In the example shown, these braking settings range from 10% to 100% in 10% increments. 10% thus represent 10% of the maximum braking power, so therefore the brake magnet 9 is still relatively far away from the flywheel 5, 100% mean maximum braking power, ie maximum approach or overlap of the brake magnet 9 to the flywheel. 5

In the following column, the reference run-out times measured on the reference training wheel are given in [s] for each defined brake device setting. Obviously, the reference run-off times decrease with increasing braking power. The reference run-out time with a minimum braking effect of 10% is 19.54 s as an example; with maximum braking power of 100% it is 6.11 s. This course corresponds ultimately with the in Fig. 3 shown course.

In the following matrix field, the defined speed steps on the pedal crank in [rpm] are indicated as abscissa, in each case in 10 steps starting at 30 rpm to 130 rpm. These pedal crank speeds correspond due to the gear ratio far higher rotation numbers of the flywheel. If a ratio of 1:10 is realized, a pedal crank speed of 30 rpm corresponds to a flywheel speed of 300 rpm, a pedal crank speed of 130 rpm corresponds to a flywheel speed of 1300 rpm. Since the flywheel speed is in a fixed ratio to the pedal crank speed, therefore, the pedal crank speed can be determined exactly from the wheel speed detected via the measuring device 10.

At each speed level, in turn assigned to each braking device setting, ie each percentage level, corresponding measured at the reference training bike performance values, ie Watt values that the exerciser has to spend when he moves the flywheel at the respective braking device setting with the respective speed. In the exemplary embodiment shown, this power value matrix is 10 × 11, so a total of 110 dedicated power values have been determined via the corresponding reference power measurement station on the reference training wheel and entered into the matrix.

If now the trainee to perform a calibration, it is first selected by him on the serial train to be calibrated calibration mode by the computing device 13 via the display device 14, unless the computing device 13 does not require, for example, due to a defined time specification by itself to carry out the calibration. The trainee is first displayed on the display device 14 via the computing device 13 that he should first drive the flywheel 5, and this is to achieve a minimum speed of the pedal crank of at least 100 U / min, preferably of at least 110 U / min. The trainee now comes after, he enters until, for example, the required 110 U / min is reached at pedal crank speed. The measuring device 10 (or the computing device 13, depending on who has the appropriate processor) continuously detects the speed of the flywheel 5 and calculates the corresponding pedal crank speed, after you know the gear ratio between pedal crank mechanism 2 and flywheel 5. When the required speed of 110 rpm is reached, the trainee is informed via the display device 14 that he should terminate the pedaling process. The flywheel 5 now runs out. It is braked via the braking device 8, wherein the (theoretical) braking efficiency of the corresponding, previously selected by the exerciser SollBremseinstellung. If the trainee was asked, for example, to adjust the brake setting "70%", then the braking device 8 would retard the empty flywheel 5 with 70% of the maximum braking power. The measuring device 10 continuously measures the actual speed of the flywheel 5 and, as a result, the corresponding pedal crank speed. With reaching, for example, a pedal crank speed of 100 rpm, the time measurement begins, reaching this speed threshold thus acts as a trigger. With continued leakage of the flywheel 5, its speed and thus also the corresponding pedal crank speed decreases continuously. The decrease is continuously measured by the measuring device 10. As soon as a second speed, for example of the corresponding 50 rpm pedal crank speed, is reached, the measurement of the actual run-out time via the measuring device 10 is stopped. Thus, the actual Auslaufzeit the series training bike in relation to the previously set brake setting of 70% has been recorded. In the ideal case, ie if the series training wheel would correspond to the reference training bike, the actual run-out time would have to be 11.07 s.

However, if, for example, an actual outflow time of 12.56 s results, then a time difference is given. The computing device 13 now checks to what extent the measured actual run-out time of 12.56 can still be assigned to the brake setting of 70% given reference run-out time of 11.07 s, or whether an assignment to a different brake setting and thus a different reference time is required is. After only 10 reference outflow times are given here in the example shown, it goes without saying that a certain time interval is set around each reference outflow time, within which an actual outflow time may still lie in order to be assigned to the corresponding reference outflow time. Based on the example of an actual outflow time of 12.56 s, the computing device would now recognize that this actual outflow time, which may still be slightly rounded, for example, to a decimal point to 12.6 s, closer to the reference flow time of 13.12 s for the braking device setting of "60%" is at the reference run-out time of 11.07 s for the set braking device setting of "70%". In this case, therefore, the display device 14 immediately causes a display change on the part of the computing device 13, the form that is changed from the previously given indication of the desired brake device setting of "70%" to the actual setting of "60%". After all, in the end there is ultimately a braking effect as a result of the actual brake setting of only about 60%, but not of the previously given 70%. From now on, the computing device 13 corrects the corresponding brake setting display of the type that, even if the setting is changed, the now correct, calibrated brake setting is always displayed, even if the setting is subsequently changed by the trainee.

Correspondingly, the corresponding power values assigned to the calibrated brake device setting will henceforth also be taken into account in the course of the power determination. Based on the example described above, in which the exerciser has previously set 70%, but in fact a brake adjustment given only 60%, if the training is now continued with the correct 60% setting, the performance values given in this row would be used, depending on which specific pedal crank he is driving in the subsequent training session.

Of course, the calibration can be done in both directions. Had a calibration time of, for example, 10.2 s resulted in the calibration as the actual run-out time, the computing device would have output the desired setting of "80%" to the display device 14, and thus determined that the actual braking effect would not be 70%. as set, but actually 80% (approached) amounts.

In the embodiment shown, only 10 brake settings are indicated. Of course, it is possible to break down the brake settings even more finely, for example, in 1% steps, starting from 1% to a maximum of 100% braking effect. That means that a total of 100 settings are given. For each brake setting, a corresponding reference run-out time has been determined on the reference exercise bike, so that there are also 100 reference run-down times. If an actual outflow time is determined, then it can be assigned to a much more accurate 1% level, so that, for example, a shift from a set brake setting of 70% takes place, for example, to 64% when determining an actual outflow time of 12.56 seconds , The calibration can thus be made much more accurate, since the individual reference run-down times of the 100 position steps are to be set much smaller time intervals, than with only ten reference run-down times. Correspondingly, of course, there are also considerably more power values, although of course these can also be split not only in steps of ten, but, for example, in steps of five in terms of the rotational speed.

Of course, it is conceivable to perform the described procedure not only once, but, for example, two or three times, so therefore to determine two or three actual flow times, each for identical Bremseinrichtungseinstellung. From these multiple actual flow times, the computing device 13 now determines an averaged actual flow time, which then coincides with the reference flow times is compared. The actual outflow time is thus determined here on a broader basis.

After a successful calibration, a second test run can be performed. For example, the user is prompted via the display device 14 to change this to 40% instead of the exemplary 60% corrected brake device setting. Then it is again requested to pedal until a pedal cranking speed of, for example, 110 rpm is determined, after which the pedaling mode is ended and, when reaching 100 rpm, the time measurement begins, ending at 50 rpm, for example. Thus, an actual run-out time is again determined with respect to the brake device setting of 40%. In the example shown, this actual run-out time would now have to be in the range of the reference run-down time of 16.23 s, or in the associated time interval. If so, the first calibration was successful.

Although in the example described above as the first and second speed 100 U / min or 50 U / min based on the pedal crank mechanism or the pedals are given, it would of course be conceivable, directly the flywheel speeds, which are measured directly on the measuring device 10, based to lay. At a gear ratio e.g. of 1:10 would then be set as the first flywheel speed 1000 U / min and as the second flywheel speed 500U / min, so the actual run-out time between these two speed values are measured. Furthermore, the power values with known gear ratio corresponding flywheel speeds can be assigned, in the example so flywheel speeds of 300 - 1300 U / min. The results obtained would of course be the same.

Decisive for the actual Auslaufzeitmessung is the accurate detection of the measurement triggering the first and the terminating second speed. This is possible with the exercise bike according to the invention, since a high-resolution detection of the duration of one revolution of the rapidly rotating flywheel 5 takes place. For this purpose, a measuring device is used, the only one arranged on the flywheel 5 magnetic element 11 and a stationary measuring device 12, so a suitable sensor, for example, includes a Hall sensor. The sensor generates a signal each time the magnetic element rotates past it. Consequently, since only one magnetic element is provided, the time elapsed between two consecutive signals is exactly the time that the flywheel has needed for that one revolution. This measured time is synonymous with the actual speed. Since the signals are continuously generated and consequently the time intervals between two signals are continuously detected either by the measuring device itself or by the computing device, which are designed for the detection of time intervals in the millisecond range, the actual rotational speed can consequently be determined very accurately. But this is also the temporal speed curve, and thus concretely reaching the first speed at which the measurement of the actual flow time begins, as well as the achievement of the second speed at which the measurement of the actual flow time is stopped, highly accurately detected. Since, as stated, the pedal crank speed is translated, there is consequently a high flywheel speed. Consequently, at high crank speed very high flywheel speeds are given, which are in the range of several 100 rev / min to well over 1000rpm, depending on the specific translation. As a result, there are very small time intervals between two consecutive signals, they are in particular at higher speeds in the range of several 10 - 100 milliseconds (at a speed of eg 1000 U / min, the time interval is only 60 ms, at a speed of 600 U / min, the time interval is 100 ms). This is fundamental to extremely accurate speed sensing. Because of the high-resolution time recording with changes in the time intervals in the millisecond range, even minimal resulting speed changes can be detected. Consequently, the achievement of the first as well as the second speed can be detected very accurately, which in turn results in a highly accurate determination of the actual run-out time.

Claims (15)

Stationary exercise bike comprising a pedal crank mechanism coupled to a flywheel via a gear ratio, a magnetic braking device cooperating with the flywheel and variable in braking action, and a calculator with associated indicator, characterized in that in the computing device (13) a calibration table is stored, containing a plurality of defined braking device settings, which are assigned reference deceleration times of not via the pedal mechanism (2) loaded flywheel (5) concerning the speed decrease from a first speed to a second speed, wherein at least once by means of a measuring device for calibration ( 10) or the computing device (13) determines the actual flow time of the flywheel (5) at a given target setting of the braking device (8) and based on the measured actual flow time by comparison with the reference flow times the flow time spec If the actual setting of the braking device (8) is determined and if the actual setting and the setpoint setting do not coincide, information relating to the actual setting can be output on the display device (14). Exercise bike according to claim 1, characterized in that the braking effect in defined stages, preferably in at least 10 stages, between a maximum braking effect and no braking effect is variable. Exercise bike according to claim 1, characterized in that the braking effect in 1% increments between 100% and 0% braking effect is variable. Exercise bike according to one of the preceding claims, characterized in that the measuring device (10) or the computing device (13) for determining an averaged actual flow time based on two in successively performed operations determined separate actual flow time is formed at the same target setting of the braking device (8) and for determining the actual setting on the basis of the averaged actual flow time. Exercise bike according to one of the preceding claims, characterized in that the flywheel (5) is provided with a flywheel rotation at the stationary measuring device (10) passing and thereby by the measuring device (10) contactless detectable element (11), in particular a magnetic element, wherein the Measuring device (10) or the computing device (13) is formed on the basis of the given between two successive detected passes of the element time intervals for determining the speed and thus the first and the second speed. Exercise bike according to claim 5, characterized in that the measuring device (10) or the computing device (13) also for determining the actual flow time between reaching the first speed and the achievement of the second speed Exercise bike according to one of the preceding claims, characterized in that on the part of the computing device (13) a calibration mode is selected in which the computing device (13) via the display device instructions to the user to drive the flywheel (5) to at least the first speed and Termination of the further operation of the pedal crank mechanism (2) can be output. Method for calibrating the power display of a stationary exercise bike (1) that can be determined by means of a computer (13), wherein a calibration table is stored in the computer (13), containing a plurality of defined brake device settings to which reference run-down times of the not loaded via the pedal mechanism (2) Flywheel (5) associated with the speed decrease of a defined first speed to a defined second speed, in which method at least once the user at a given target setting of the braking device (8) the flywheel (5) via the pedal crank mechanism (2) Training wheel (1) under continuous speed determination to a speed corresponding to at least the first speed drives, after which the operation of the pedal crank mechanism (2) is terminated and by means of a measuring device (10) or the computing device (13) the actual flow time, the Flywheel (5) is required for a drop from the first speed to the second speed, is measured, after which the actual setting of the braking device (8) is determined based on the measured actual run-out time by comparison with the reference run-out times and in case of disagreement of actual Setting and setpoint setting information regarding the actual setting on the A display device (14) can be output. A method according to claim 8, characterized in that the speed of the flywheel (5) is brought to a value above the first speed, after which the operation of the pedal crank mechanism (2) is stopped and the continuous measurement of the speed starts when the first speed is reached. A method according to claim 8 or 9, characterized in that for detecting the rotational speed of the flywheel (5) a measuring device is used, comprising a flywheel (5) arranged on the element, in particular a magnetic element (11) and a stationary measuring element (12) for each revolution of the flywheel once detected thereby moving past him measuring element and generates a signal indicating this, wherein the time between two consecutively given signals is detected for speed detection, wherein the determined time or the speed determined therefrom of the measurement of the actual flow time abutting and terminating parameters. A method according to claim 10, characterized in that the determination of the rotational speeds and the actual flow time on the part of the measuring device (10) or on the part of the computing device (13). Method according to one of claims 8 to 11, characterized in that the first speed is based on a pedal crank speed of at least 100 U / min and the difference to the second speed based on the pedal crank speed is at least 30 U / min, preferably at least 50 U / min , Method according to one of claims 8 to 12, characterized in that the process is repeated at least once at the same actual setting and based on the two measured actual flow times an average actual flow time is determined based on which the determination of the target setting is made. Method according to one of claims 8 to 13, characterized in that the process is repeated at least once at a changed second setpoint setting of the braking device (8), wherein on the basis of each measured actual flow time or any particular average actual flow time determining the respective Actual setting is done. A method according to claim 14, characterized in that the first actual setting is that setting in which no braking effect is given, and the second actual setting is the one in which the maximum braking effect is given.

Images