DE10353748A1 - Two-wheeler e.g. bicycle, operating device, has control unit to calculate gear stage based on gear transmission ratio that depends on rotation frequency of one axle and rear wheel speed, and to output stage and actual gear in display - Google Patents

Abstract

The device has a gear drive to drive two axles. Two sensors (19, 20) measure rotation frequency of one axle and rotation speed of a rear wheel of a bicycle, respectively. A control unit (22) calculates gear transmission ratio based on the outputs of the sensors and compares the ratio with the pre-stored index values to calculate the gear stage. The control unit outputs the gear stage and the actual gear in operation to a display (24).

Description

object The invention relates to a method and an apparatus for operation a two-wheeler, whereby the in-gear is controlled, as well as a corresponding bicycle computer.

in the Course of further development of two-wheelers, especially bicycles are more and more components of the bicycle are automated. That's the way it is, for example known to turn on a lighting unit of the bicycle depending on the dusk and the like. Among other things can also spring strengths operated the suspension of the bicycle adapted to the driving situation become. Thus, the bike has a variety of data available to the Users of the bicycle, for example, displayed on a bike computer can be.

In Is an indication of the engaged gear of the bicycle from EP-A-0 889 302 discloses a method and a device in which a sensor which detects which gear on the rear wheel of a Bicycle is being driven by a chain, it is detected which gear of the bicycle is engaged. This determined gear is displayed on a bike computer. The training of a special Sensor in the area of the derailleur of the chain of a bicycle is on the one hand costly and on the other hand very prone to error, since the sensor in this area regularly a heavy pollution and a very big one is exposed to mechanical stress.

From that It is an object of the present invention, a method and an apparatus for operating a bicycle, in particular a Bicycle, as well as to propose a corresponding bicycle computer, where the monitoring the engaged gear or the selected gear stages takes place reliably and what can be realized in a simple way.

These Task is solved by a method for operating a bicycle with the features of Claim 1, an apparatus for operating a bicycle with the Features of claim 8 and a bicycle computer with the features of claim 24. Advantageous developments are the subject of respective dependent Claims.

The inventive method for operating a bicycle, especially a bicycle,
wherein a second axis of the bicycle is driven by a substantially periodic action of force on a first axis,
wherein the first axis and the second axis are drivably connected by a gear,
wherein the transmission has at least two exchangeable gear stages on at least one axle,
wherein first measured values are detected, which are characteristic of the rotation frequency of the first axis,
wherein second measured values are detected, which are indicative of a speed of travel of the bicycle,
is characterized in that at least from the first and the second measured values, a pair of gear stages is determined, which is characteristic of the gear stage selected on the first axis and on the second axis.

The inventive method allows it to be applied to the first and second axle Gear stage to determine without the formation of a sensor in the Range of the chain, especially in the rear hub of the Two-wheeler needed is.

at The first axis is usually the axis, which by the user of the bicycle, especially the bicycle, about it attached pedals is driven. This first axis is usually rigidly connected to at least a first gear, so that a Rotation of the first axis for rotation of the at least one first Gear leads. About one Transmission becomes the force applied by the operator of the bicycle on one of the wheels of the bicycle, in the Normally on the rear wheel. This transfer takes place with help a transmission, such as a chain, with the first Gear and at least one second gear, for example in Area of the rear hub of the bicycle is drivably connected. At the rear hub can depending on several gears present, in which case one speaks of a derailleur, however, there may also be a hub gear located in the rear hub available. The rear hub according to the invention represents a possible second Axis. Through the transmission of the transmission becomes the second by the rotation of the first axis Axis driven. Through the training of several sprockets in the Area of the second axis, the chain by means of a derailleur be overturned from one sprocket to an adjacent sprocket can, or a hub gear in the range of the second axis are on the second axis formed a plurality of gear stages, respectively have different translations.

Also in the region of the first axis, a plurality of gear stages, for example by a plurality of gears of different diameters and / or different numbers of teeth, can be realized. Thus, different gear stages can be formed on the first and on the second axis. In particular, a present in the rear hub hub with meh Reren first gears are connected to the first axis by a chain. The training example of a planetary gear or any other type of transmission is possible according to the invention.

The inventive method allows it in an advantageous manner, the gear pair of the at the first and second axis selected To determine gear stages. This is according to the invention in particular dispensed measured values directly for an engaged gear stage are characteristic, for example, a sensor in the region of the rear sprockets, which registered in which position the derailleur is currently located. The inventive method can be used particularly advantageous, if already Sensor available are the speed of travel of the two-wheeler and the Determine or characterize the rotational frequency of the first axis Deliver measured values. This can be the case if, for example a dynamo, in particular a hub dynamo is formed, from whose Operating frequency is indicative of the speed of travel. A another possibility to determine the speed of the bicycle is by a Magnets rigidly connected to spokes of the front wheel, which with each revolution of the front wheel a corresponding transducer happens. However, other ways of determining the speed of travel are also possible and according to the invention.

For the extraction the first readings for the rotational frequency of the first axis are characteristic, are diverse probe used. For example, by means of a magnet in the area the first axis and a corresponding transducer one Determination of the rotational frequency take place. Another possibility results, for example, if at least one force or torque sensor For example, in the area of the bottom bracket of the first axle of a bicycle is trained. If, for example, on one side by Peda le practiced Measured force, the result is a time course at least with turning points that arise when you step down the pedals a big one Power exercised will, while when running up the pedals no or an opposite force exercised becomes. Depending on the calibration of the sensor, this can also result in zero crossings. From this time course leaves in a simple way to the rotational frequency of the first axis shut down.

Such Force and / or torque sensors may comprise strain gauges, for example or also a deformation of the first axis by means of a force introduction region measure which is provided with a magnet, the relative movement of the magnet is determined by a Hall probe.

are the speed of travel and the rotational frequency of the first Axis known, it can easily, for example, the currently selected gear ratio of Gearbox be determined. As a rule, only fixed gear stages It is provided on the first and / or the second axis possible, from the gear ratio on to close the selected on the first and second axis gear stage.

According to one advantageous embodiment of the method according to the invention comprises Transmission at least one chain and at least one gear on the first and second axis.

The power transmission from the first driven by the user or a motor Axis on the second axis to be driven by a transmission, which by a chain and at least one gear at the first and the second axis is formed, represents a very simple, inexpensive and easy-to-maintain type of power transmission.

According to one further advantageous embodiment of the method according to the invention is the at least one gear stage on the first and / or the second axis as multiple gears with formed different diameters and / or numbers of teeth.

The Training the gear stages at the first and / or the second Axle as a plurality of gears allows in a simple way the construction of gearboxes with a variety of possible Gear stages pairs. In addition, the training in the form of gears Maintenance and cleaning of the gearbox also for the layman.

According to one further advantageous embodiment of the method according to the invention is the at least one gear stage on the first and / or the second axis formed in the form of a hub circuit.

The Training the gear stages as a hub gear allows one encapsulated, low-maintenance construction of the gear stages and is often formed in the rear hub of the rear wheel of a bicycle. Such a hub gear can be different with a plurality of sprockets Number of teeth and / or diameter at the first and / or the second Axis can be combined in an advantageous manner.

According to a further advantageous embodiment of the method according to the invention at least one gear stage pair is vorhal each to serve as a plausibility check for future values of the gear stage pair. It is particularly advantageous in this context that the gear stage pair is corrected after a plausibility check with previously determined values of the gear stage pair.

A such storage of the chosen Gear stage pair allowed in a simple and advantageous manner a plausibility check. ever after forming the gear stages at the first and the second Axis, it may happen that different pairs of gear stages gear ratios on the first and second axes identical gear ratios exhibit. If now the gear pair as described above based on the specific gear ratio is determined, it can lead to errors. Such mistakes can be made by a plausibility check should be avoided. This exploits, for example, the fact that two-wheel gearshifts usually only one gear at a time. The is called, changes during a switching operation Only the first or the second gear step by one step. However, since the gear stages are previously known, for example, by the numbers of teeth of the gears used are known, the determined translation ratio with the last gear stage pair to be compared. Since only one the gear stages can change by one step, the received Gear pair if necessary be corrected accordingly, so that the above-described errors avoided in an advantageous manner can be.

According to a further advantageous embodiment of the method according to the invention is
because of the first measured value, the rotational frequency of the first axis and
determined on the basis of the second measured value, the speed of movement of the bicycle and
the determined from these parameters with a predeterminable value of a Radumfangs of the second axle driven wheel, which results from the selected gear ratios on the first axis and the second axis, and
determined from a comparison of this ratio with predeterminable values a selected gear of the bicycle.

This allows Advantageously, the determination of the inserted gear of the Two-wheeler, with recourse to known data of the two-wheeler is, for example, on the wheel circumference and known Übersetzungszahlverhältnisse the known aisles. Here, too, can advantageously be a correlation with previous values of the gear in which particular consideration is given, that usually only one gear stage at the first or change the second axis can.

Below translation number in the meaning of the application, in particular, the translation is understood the particular gear stage pairs predetermined or predeterminable is assignable, so the translation numbers, which are achieved by the dimensioning of the gear stages. Under the gear ratio in The meaning of the application is the respectively from the first and the second Reading certain translation to understand.

According to a further aspect of the inventive concept, an apparatus for operating a bicycle, in particular a bicycle, is proposed, comprising:
a first axis, which can be driven by a substantially periodic force,
a second axis drivable by the first axis,
a transmission which drivably connects the first and the second axle, wherein the transmission has a plurality of exchangeable gear stages on at least one of the first and second axles,
a first measuring sensor which detects first measured values which are characteristic of the rotational frequency of the first axis,
a second sensor which detects second measured values which are indicative of the speed of travel of the bicycle,
a control unit, which is connectable via at least one connection permitting data transfer in at least one direction at least with the first and the second sensor, wherein the device according to the invention is characterized in that the control unit comprises means for calculating the at the first axis and / or the second axis selected gear stage (s) from the first and second measured values.

The device according to the invention has the advantage that a system can be realized without great effort, with which it is possible to determine the gear stage pair, that is to say the gear stage currently selected on the first and the second axle. This can be done in particular without much effort, since most bicycles have at least one second sensor, which detects measured values that are characteristic of the speed of movement of the bicycle. Today, modern bicycles also often have sensors that monitor the rotation of the driven or driven by the user axis and determine the rotational frequency of the first axis. For example, sensors are known which can detect, for example, a deformation, in particular a torsion, of the driving first axis, in which, for example, the deformation is determined by a relative movement of a magnet relative to a Hall probe. These may be formed, for example, in and / or on the bottom bracket of the first axis, where they provide measured values which are suitable for the forces introduced during the driving of the wheel are characteristic. From these forces, among other things, the currently applied torque can be determined. Since just when driving a bicycle, the first axle is driven by pedals, in which a corresponding force on one side of the bottom bracket always occurs only when stepping down the pedals, it can be concluded in a very simple manner to the frequency of rotation of the first axis.

According to one advantageous embodiment of the device according to the invention comprises Transmission at least one chain and at least one gear on the first and second axis.

Of the Construction of a transmission for Bikes, in particular Cycles, from a chain and at least one gear on the driven first Axis and the driven second axis represents a very simple Type of a gearbox that is easy to build, inexpensive to manufacture and even for Layman is easy to maintain. The different gear stages on the first and / or the second axis can be in easier Way through each of several coaxial gears of different diameters and / or numbers of teeth between which the chain is changed by a derailleur can be, or a hub gear, which is encapsulated within one of the hubs of the driven axle can be formed.

According to one further advantageous embodiment of the device according to the invention include the gear stages on the first axis and / or the second Axle at least two gears with different numbers of teeth and / or diameters.

So It is possible according to the invention, both the first axis, as well as on the second axis or even only one of the two axes, several gear stages by multiple gears, between which can be changed by means of a derailleur.

According to one further advantageous embodiment of the device according to the invention include the gear stages on the first axis and / or the second Axle a hub gear.

It is according to the invention possible, a derailleur, so the formation of multiple gear stages by means of several gears with different numbers of teeth and / or diameters, at the first and / or on the second axle with a hub gear in the first and / or the second axis. This can be done in an advantageous manner a variety of aisles realize and determine according to the invention.

According to one further advantageous embodiment of the device according to the invention The control unit comprises storage means in which at least values of the gear stage pair are stored.

This allows advantageously carrying out plausibility checks, where the chosen Gear stage pair with previously selected Gear stage pairs is compared to the plausibility of the particular Gear pair to test. Optionally, a correction of the determined gear stage pair based on this plausibility check. This takes into account, for example, that in each case only in an adjacent gear stage each at the changed first or the second axis at a gear stage change can be.

According to one further advantageous embodiment of the device according to the invention is the control unit over a data transfer in at least one direction permitting second connection connected to a display means on which at least the gear selected at the first axis and / or the second axis can be displayed.

The Display means can advantageously integrated into a bicycle computer, on the next to the chosen one Gear stage pair also a lot of other data like the current speed, the driven tour and / or total kilometers, the current spent torque, already consumed calories, etc. can be displayed. The display means may select the selected gear pair, the chosen one Show gear and / or the gear ratio you have just selected.

A a data transfer in at least one direction permitting connection means in particular that in the case of the display means data from the control unit can be transmitted to the display means, however It may also be possible be that transfer data from the display means to the control unit such as user input. Such a connection can be in one cable, but is just as well an integrated one Bus system or a wireless connection, for example in Form of electromagnetic radiation, especially in shape a wireless LAN (WLAN) possible and according to the invention.

According to one further advantageous embodiment of the device according to the invention includes the data transfer in at least one direction permitting first and / or second connection at least one cable.

in this connection can connect in a single or multiple cables or also in an integrated bus system, via which a plurality of functional units on the bike is connected. For example, like this in the control unit, data from a lighting unit, a Hub dynamo, a suspension, a tilt sensor and the like processed and these devices each be addressed separately addressable.

According to one further advantageous embodiment of the device according to the invention is the data transfer in at least one direction permitting first and / or second connection wirelessly, preferably via a Compound with electromagnetic waves, particularly preferred in Form of a wireless LAN, trained.

A wireless training of compounds reduces in an advantageous manner Way the vulnerability of the systems due to mechanical loads.

According to one further advantageous embodiment of the device according to the invention includes the first sensor a sensor, which records values for Characterizing the momentarily applied to the first axis torque are, in particular a strain gauge and / or a nach the hall effect working sensor.

Torque sensors can be in advantageously just sporty oriented two-wheelers to control their training conditions. In particular, one Control of the physical work done is thus sufficiently accurate possible. In this case, for example, the torque on the first axis the determination of the torsion of the first axis, wherein a relative movement a magnet is detected by means of a Hall sensor.

According to one further advantageous embodiment of the device according to the invention includes the second sensor a magnet, which thus connected to a wheel of the bicycle is that he is witnessing a rotation of the wheel about an axis, and a cooperating with the magnet pickup.

in this connection it is a common one used type of speed measurement in bicycles, where the transducer is mounted, for example, on the bicycle fork, so that the magnet, which in the spokes of one of the wheels, in particular of the Front wheel, attached, is rotated with the wheel while the Transducer is mounted so that it is in relation to the frame of the Bicycle is immobile. The thus determined rotation frequency, for example of the front wheel is determined by a predeterminable Radumfangs in the current speed of movement of the bike converted.

According to one further advantageous embodiment of the device according to the invention The bicycle for power generation includes a generator, preferably a dynamo, more preferably a hub dynamo, wherein the second probe at least one frequency with which the generator is operated detected In particular, a hub dynamo usually has a variety of Poland, for example twelve or even 24 poles, so the frequency with which the hub dynamo is operated to a corresponding factor is greater as the rotational frequency of the hub in which the dynamo is formed is. This significantly increased Frequency that is measured requires significantly greater accuracy, especially with regard to temporal changes in speed, as other speed sensors. From the frequency of the hub dynamo let yourself based on a predeterminable value of the circumference of the wheel, in which the hub dynamo is formed, the speed of movement of the bicycle. something similar applies to Dynamos, which run along the front wheel of a bicycle, for example can.

According to one further advantageous embodiment of the device according to the invention in the storage means the wheel circumference is one of the second Axis drivable wheel, predetermined gear stage pairs of Gear stages applied to the first and second axes assigned translation numbers and / or at an earlier date certain gear stages on the first and / or the second axis stored.

The Storage of a predetermined Radumfangs of the second Axis driven wheel allows in conjunction with the determination of the rotational frequency of one of Axes of the wheels of the bicycle, in particular of the wheel, which by the second Axis is driven, in a particularly simple way the determination the speed of movement of the bicycle.

The storage of previously determined gear stage pairs allows in a particularly simple and advantageous manner a plausibility check of the currently determined gear stage pair. If, for example, the second gear stage is selected on the first axis and the fourth gear stage is selected on the second axis, the measured values also allow, for example, the possibility of selecting the third gear stage on the first axis and the second gear stage on the second axis if the second gear stage is stored as the last gear stage pair on the first axle and the fifth gear stage is stored on the second axle, the incorrect result due to a plausibility check As a rule, gear shifts only allow the change of a gear stage on an axis.

The Storage of translation numbers, the predetermined gear stage pairs are assigned allowed in a simple way the determination of gear stage pairs, if gear ratios, for example, due to the measurement of the speed and the Rotational frequency of the first axis, determined and with stored translation numbers be compared.

According to one further advantageous embodiment of the device according to the invention determines the control unit based on the first measured value, the second Measured value and the wheel circumference the selected gear ratio and compares this with the stored gear ratios to the gear pair to determine.

There the gear ratios associated with each gear pair are predetermined in particular by the design of the gear stages, it is based on the determination of the translation ratio possible, on the currently selected Gear pair and thus to close the engaged gear. is the translation defined as the ratio from the rotational frequency of the driven axle to that of the driving one Axis, in this case the ratio of the rotation frequency the second axis to the rotational frequency of the first axis, so determined the translation number from the speed of travel v divided by the product from the rotational frequency of the first axis and the circumference of the wheel, which is driven by the second axis. Thus it is in easy way possible based on the speed of movement and the rotational frequency of first axis on the selected Close gear pair.

According to one further advantageous embodiment of the device according to the invention becomes the gear stage pair with previously determined gear stage pairs compared by means of a plausibility check.

in this connection can be considered in an advantageous way be that gear shifts only a change to a certain Number of gear stages, in particular a gear stage, only at one allow the first and second axis.

According to one further advantageous embodiment of the device according to the invention the gear stage pair is corrected based on the results of the plausibility check.

This allows the exclusion of errors that are based on a translation number assigned to different gear stage pairs.

According to one further advantageous embodiment of the device according to the invention is at least the control unit in a two-wheeled computer, in particular includes a bicycle computer.

The Integration of at least the control unit in a bicycle computer allows the determination of the currently selected gear stage pair in a particularly simple manner, in particular also already using for other purposes, such as the speed determination, trained sensor.

According to another aspect of the inventive concept, a bicycle computer for a bicycle is proposed,
which can be connected to a first measuring sensor which can detect first measured values which characterize the rotational frequency of a first axis which can be driven by a user,
which can be connected to a second measuring sensor, which can detect second measured values which characterize a travel speed of the bicycle, wherein the bicycle computer is designed such that it can carry out the method according to the invention or be part of a device according to the invention.

One such bicycle computer according to the invention can advantageously in particular as a replacement part for already existing systems are used, which he adds to the functionality of the provision of the chosen Gear pair or the inserted gear extended.

All made statements for the inventive method and the device according to the invention can be in the same way on the bicycle computer according to the invention apply and vice versa.

in the The following is the invention with reference to the accompanying drawings explained in more detail and preferred embodiments shown, without the invention being limited thereto. Show it:

1 schematically a bicycle;

2 schematically a part of a bicycle; and

3 schematically a device according to the invention.

1 shows schematically and simplified a bicycle 1 with a front wheel 2 and a rear wheel 3 , In a frame 4 is a first axis 5 stored, allowing a rotation of the first axis 5 is possible. With the first axle 5 not shown pedals are connected via not shown crank arms, so that by pedaling the first axis 5 can be rotated. With the first axle 5 is at least a first gear stage 6 connected. The at least one first gear stage 6 is for example in the form of a plurality of coaxial gears having different diameters and numbers of teeth, which are formed so that a chain 7 can be transported by a derailleur from a gear to an adjacent gear with different diameter and / or number of teeth. About the chain 7 is the at least one first gear stage 6 with at least one second gear stage 8th connected, which with a second axis 9 connected is that a rotation of the second gear stage 8th to a rotation of the second axis 9 leads. Also the at least one second gear stage 8th can be designed as at least one gear, with several coaxial gears of different diameters and / or numbers of teeth are also possible here. The gear stages 6 . 8th as well as the chain 7 form a gear 10 , which is the transmission of power from the drivable first axis 5 to the driven second axis 9 ,

In general, the training of the transmission 10 not only in the form of a plurality of gears and a chain 7 possible, other forms of transmission are possible and according to the invention, for example, at least partially a hub gear or a planetary gear. In particular, the training of one of the gear stages 6 . 8th in the form of a plurality of gears, so as a derailleur, and the formation of a gear stage 6 . 8th at least partially possible in the form of a hub gear and according to the invention.

The second axis 9 is like that with the rear wheel 3 connected to that rotation of the second axis 9 to a rotation of the rear wheel 3 leads, leaving a rotation of the first axis 5 over the transmission 10 a rotation of the rear wheel 3 taught. Equally possible and according to the invention is also an embodiment in which the second axis 9 rigid with the front wheel 2 is connected, so here is a rotation of the first axis 5 over the transmission 10 a rotation of the front wheel 2 taught.

2 schematically shows a part of a bicycle. The first axis 5 is with first gears 11 . 12 . 13 rigidly connected, leaving a rotation of the first axis 5 to a rotation of the first gears 11 . 12 . 13 leads. The first axis 5 can through pedals 14 that have crank arms 15 with the first axis 5 are connected, are set in rotation. The first gears 11 . 12 . 13 are coaxial with the first axis 5 , In the present example, the middle first gear 12 over the chain 7 with a middle second gear 17 connected. The middle second gear 17 and a small second gear 16 and a big second gear 18 are coaxial with the second axis 9 and so connected with this, that is a rotation of the second gears 16 . 17 . 18 for rotation of the second axis 9 leads. The second axis 9 is rigid with the rear wheel, not shown 3 connected, so over the chain 7 by rotation of the first axis 5 by means of the pedals 15 the rear wheel 3 is driven. The first gears 11 . 12 . 13 and the second gears 16 . 17 . 18 form gear stages 6 . 8th the axes 5 . 9 ,

In the present example, the selected gear pair consists of the middle first gear 12 and the middle second gear 17 passing through the chain 7 drivable connected to each other. One of the gear stages 6 . 8th can be changed by a derailleur, not shown, in which, for example, the chain 7 from the middle first gear 12 on the little first gear 11 is overturned. It should be noted that as a rule only one change of either the gear stages on the first axis 5 or on the second axis 9 by one level is possible. Each gear stage pair is assigned a specific gear ratio.

3 schematically shows a device according to the invention, the first sensor 19 and a second sensor 20 having. The first sensor 19 records measured values that characterize the rotation frequency F of the first axis 5 are while the second sensor 20 Measured measured values that are indicative of the speed of travel V of the bicycle. The transmission ratio U, which is the two selected gear stages 6 . 8th is proportional to the travel speed V of the bicycle and inversely proportional to the product of the rotational frequency F of the first axis 5 and the wheel circumference R of the second axis 9 driven front wheel 2 or rear wheel 3 :

The probes 19 . 20 are via a data transfer in at least one direction permitting first connection 21 with a control unit 22 connected. The through the sensor 19 . 20 measured values are recorded over the first connections 21 to the control unit 22 transfer. Because of the first sensor 19 measured values, the determination of the rotational frequency F of the first axis 5 and through the second sensor 20 measured values allow the determination of the speed of travel V of the bicycle is so by the control unit 22 a determination of the current transmission ratio U possible. The control unit 22 further comprises storage means, not shown, in which predetermined transmission gear pairs associated transmission numbers are stored. By comparing the particular gear ratio with the stored assigned gear ratios, the gear ratios currently selected can be determined. Depending on the design of the first gears 11 . 12 . 13 and the second gears 16 . 17 . 18 It may happen that the assignment of the gear stage pairs to the gear ratios is not unique. In this case, a plausibility check can be performed to determine the correct gear ratios selected. For this purpose, for example, the last selected gear stage pair is stored in the memory means and adjusted during the gear change, which can be achieved by a switching operation of the gear pair determined by the comparison. This means that ambiguous assignments can not be eliminated and the correctly selected gear pair can be determined.

As second sensor 20 are all known speed sensors, such as those on one of the wheels 2 . 3 revolving magnet and one on the frame 4 firmly assembled customers are based. In particular, the speed can also be determined from the frequency of the voltage of a dynamo, for example a hub dynamo.

As first sensor 19 In particular, sensors can be used in which the rotational frequency F of the first axis 5 by means of one with the axis 5 mitrotierenden magnet and a corresponding transducer be true. Furthermore, it is possible, for example, the rotational frequency F of the first axis 5 based on readings to be determined by the pedals 14 characterize the forces exerted. In this case measuring probes based on strain gauges and on relative movements of a magnet, which are based on Hall probes, have proven to be particularly suitable.

About a second data transfer in at least one direction permitting second connection 23 is the control unit 22 with display means 24 connected, so that the determined gear stage pair or the resulting engaged gear of the bicycle can be displayed to the user. The control unit 22 and / or the display means 24 can be part of a bike computer. Such a bicycle computer according to the invention can be provided in an advantageous manner as supplementary or replacement component, if on a two-wheeled vehicle the required first 19 and second sensor 20 already exist.

The inventive method and the device according to the invention advantageously allow the determination of the first axis 5 and the second axis 9 selected gear stages 6 , S based on the rotational frequency F of the first axis 5 and the travel speed V of the two-wheeler. These gear ratios correspond to the engaged gear of the bicycle, so that the user of the bicycle can control the engaged gear or this can be used for other calculations.

1

bicycle

2

front

3

rear wheel

4

frame

5

first axis

6

first gear stage

7

Chain

8th

second gear stage

9

second axis

10

transmission

11

small first gear

12

average first gear

13

big first gear

14

pedal

15

crank

16

small second gear

17

average second gear

18

big second gear

19

first probe

20

second probe

21

first connection

22

control unit

23

second connection

24

display means

F

rotation frequency

R

Wheel size

U

ratio

V

Travel speed

Claims (24)

Method for operating a bicycle, in particular a bicycle ( 1 ), wherein by substantially periodic force acting on a first axis ( 5 ) a second axis ( 9 ) of the bicycle is driven, wherein the first axis ( 5 ) and the second axis ( 9 ) by a transmission ( 10 ) are drivably connected, wherein the transmission ( 10 ) on at least one axis ( 5 . 9 ) at least two exchangeable gear stages ( 11 . 12 . 13 . 16 . 17 . 18 ), wherein first measured values are detected which are indicative of the rotational frequency (F) of the first axis ( 5 ), wherein second measured values are detected which are indicative of a travel speed (V) of the bicycle, characterized in that at least the first and second measured values, a gear stage pair is determined which is indicative of that on the first axis ( 5 ) and on the second axis ( 9 ) selected gear stage ( 6 . 8th ). Method according to claim 1, characterized in that the transmission ( 10 ) at least one chain ( 7 ) and at least one gear ( 11 . 12 . 13 . 16 . 17 . 18 ) at the first ( 5 ) and the second axis ( 9 ). Method according to one of the preceding claims, characterized in that the at least one gear stage ( 6 . 8th ) at the first ( 5 ) and / or the second axis ( 9 ) as multiple gears ( 11 . 12 . 13 . 16 . 17 . 18 ) is formed with different diameters and / or numbers of teeth. Method according to one of the preceding claims, characterized in that the at least one gear stage ( 6 . 8th ) at the first ( 5 ) and / or the second axis ( 9 ) is formed in the form of a hub circuit. Method according to one of the preceding claims, characterized characterized in that in each case at least one gear stage pair kept is going to be a plausibility check for the future serve determining values of the gear stage pair. Method according to claim 5, characterized in that that the gear stage pair with a plausibility check earlier certain values of the gear stage pair is corrected. Method according to one of the preceding claims, characterized in that on the basis of the first measured value, the rotational frequency (F) of the first axis ( 5 ) and, based on the second measured value, determines the speed of travel (V) of the two-wheeler and determines from these parameters a predeterminable value of a wheel circumference (R) of the second axle ( 9 ) drivable wheel ( 2 . 3 ), which consists of those on the first axis ( 5 ) and the second axis ( 9 ) selected gear stages ( 6 . 8th ), and a selected gear of the bicycle is determined from a comparison of this transmission ratio (U) with predeterminable values. Device for operating a bicycle, in particular a bicycle ( 1 ) comprising: a first axis driven by a substantially periodic force ( 5 ); a second axis drivable by the first axis ( 9 ), a transmission ( 10 ), which is the first ( 5 ) and the second axis ( 9 ) driveably connects, wherein the transmission ( 10 ) at least at one of the first (5) and the second axis ( 9 ) several exchangeable gear stages ( 11 . 12 . 13 . 16 . 17 . 18 ), a first sensor ( 19 ), which detects first measured values that are characteristic of the rotational frequency (F) of the first axis ( 5 ), a second sensor ( 20 ), which detects second measured values which are indicative of the speed of travel (V) of the bicycle, a control unit ( 22 ), which has at least one connection permitting a data transfer in at least one direction ( 21 ) at least with the first ( 19 ) and the second sensor ( 20 ), characterized in that the control unit ( 22 ) Means for calculating the at the first axis ( 5 ) and / or the second axis ( 9 ) selected gear stage (s) ( 6 . 8th ) from the first and second measured values. Apparatus according to claim 8, characterized in that the transmission ( 10 ) at least one chain ( 7 ) and at least one gear ( 11 . 12 . 13 . 16 . 17 . 18 ) at the first ( 5 ) and the second axis ( 9 ). Device according to one of claims 8 or 9, characterized in that the gear stages ( 11 . 12 . 13 . 16 . 17 . 18 ) on the first axis ( 5 ) and / or the second axis ( 9 ) at least two gears ( 11 . 12 . 13 . 16 . 17 . 18 ) with different numbers of teeth and / or diameters. Device according to one of claims 8 to 10, characterized in that the gear stages on the first axis ( 5 ) and / or the second axis ( 9 ) comprise a hub circuit. Device according to one of claims 8 to 11, characterized in that the control unit ( 22 ) Memory means in which at least values of the first ( 5 ) and the second axis ( 9 ) selected gear stage ( 6 . 8th ) are storable. Device according to one of claims 8 to 12, characterized in that the control unit ( 22 ) via a data connection in at least one direction permitting second connection ( 23 ) with a display means ( 24 ), on which at least those on the first axis ( 5 ) and / or the second axis ( 9 ) selected gear stage ( 6 . 8th ) can be displayed. Device according to one of claims 8 to 13, characterized in that the data transfer in at least one direction permitting first ( 21 ) and / or second compound ( 23 ) comprises at least one cable. Device according to one of claims 8 to 14, characterized in that the data transfer in at least one direction permitting first ( 21 ) and / or second compound ( 23 ) wireless, preferably via a connection with electromagnetic waves; particularly preferably in the form of a wireless LAN is formed. Device according to one of claims 8 to 15, characterized in that the first sensor ( 19 ) comprises a measuring sensor which detects values which are suitable for the just on the first axis ( 5 ) are characteristic torque applied, in particular a strain gauge and / or a working after the Hall effect sensor. Device according to one of claims 8 to 16, characterized in that the second sensor ( 20 ) a magnet, which with a wheel ( 2 . 3 ) of the bicycle is connected to a rotation of the wheel ( 2 . 3 ) along an axis, and includes a transducer cooperating with the magnet. Device according to one of claims 8 to 17, wherein the two-wheel for power generation comprises a generator, preferably a dynamo, particularly preferably a hub dynamo, characterized in that the second sensor ( 20 ) detects at least one frequency with which the generator is operated. Device according to one of claims 12 to 18, characterized in that in the storage means of the Radumfangs (R) of the second axis ( 9 ) drivable wheel ( 2 . 3 ), predetermined gear stage pairs of gear stages ( 6 . 8th ), which lie against the first and the second axis, associated transmission ratios (U) and / or previously determined transmission stages ( 6 . 8th ) at the first ( 5 ) and / or the second axis ( 9 ) are storable. Device according to claim 19, characterized in that the control unit ( 22 ) determines, based on the first measured value, the second measured value and the wheel circumference, the selected transmission ratio (U) and compares this with the stored transmission numbers in order to determine the transmission stage pair. Device according to one of claims 8 to 20, characterized that the gear stage pair with previously determined gear stage pairs in Ways of a plausibility check compared becomes. Apparatus according to claim 21, characterized that the gear stage pair is corrected based on the results of the plausibility check. Device according to one of claims 8 to 22, characterized in that the control unit ( 22 ) is included in a two-wheeled computer, in particular a bicycle computer. Bicycle computer for a bicycle ( 1 ), which with a first sensor ( 19 ), which is capable of detecting first measurement values which determine the rotational frequency (F) of a first axis ( 5 ), which is connected to a second sensor ( 20 ) capable of detecting second measured values indicative of a traveling speed (V) of the bicycle, characterized in that the bicycle computer is arranged to perform the method according to any one of claims 1 to 7 or part of a device according to any one of the claims 8 to 23 can be.