DE3722728C1 - Work meter for a crank drive - Google Patents
Work meter for a crank driveInfo
- Publication number
- DE3722728C1 DE3722728C1 DE3722728A DE3722728A DE3722728C1 DE 3722728 C1 DE3722728 C1 DE 3722728C1 DE 3722728 A DE3722728 A DE 3722728A DE 3722728 A DE3722728 A DE 3722728A DE 3722728 C1 DE3722728 C1 DE 3722728C1
- Authority
- DE
- Germany
- Prior art keywords
- crank
- bicycle
- strain gauges
- bottom bracket
- drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
- B62J45/40—Sensor arrangements; Mounting thereof
- B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
- B62J45/411—Torque sensors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
- B62J45/40—Sensor arrangements; Mounting thereof
- B62J45/42—Sensor arrangements; Mounting thereof characterised by mounting
- B62J45/421—Sensor arrangements; Mounting thereof characterised by mounting at the pedal crank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
- B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/108—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving resistance strain gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/14—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft
- G01L3/1407—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs
- G01L3/1428—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs using electrical transducers
- G01L3/1457—Rotary-transmission dynamometers wherein the torque-transmitting element is other than a torsionally-flexible shaft involving springs using electrical transducers involving resistance strain gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/247—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying tractive or propulsive force and velocity
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Messung der an einem Kurbelantrieb angreifenden Leistung, bei der die Dreh momentübertragung von der Kurbel auf eine Antriebsscheibe, zum Beispiel auf das Kettenblatt eines Fahrrad-Tretlagers, erfolgt, wobei die an der Kurbel auftretenden mechanischen Größen, Drehimpuls und Winkelgeschwindigkeit, in elektrische Signale umgewandelt werden und die elektrischen Signale einem Auswertgerät zugeführt werden.The invention relates to a device for measuring the a crank drive attacking performance where the rotation torque transmission from the crank to a drive pulley, for example on the chainring of a bicycle bottom bracket, takes place, the mechanical occurring on the crank Sizes, angular momentum and angular velocity, in electrical Signals are converted and the electrical signals be fed to an evaluation device.
Eine derartige Vorrichtung ist aus der DE-OS 25 08 233 bekannt. In dieser Druckschrift wird ein Kurbelantrieb beschrieben, dessen auf eine Antriebsscheibe übertragene Leistung mittels eines Bremsbandes mit einer bestimmten Kraft gebremst wird. Aus dem einstellbaren Bremsmoment und der Winkelgeschwindig keit der Antriebsscheibe wird die entsprechende Leistung er mittelt. Insbesondere Fig. 8 dieser Druckschrift zeigt einen derartigen Kurbelantrieb bei einem Fahrradergometer. Diese Leistungsmessungsvorrichtung hat jedoch in Verbindung mit Fahrrädern den Nachteil, daß die gesamte, an der Kurbel an greifende Leistung in Wärme und nicht in Vorwärtsbewegung um gesetzt wird.Such a device is known from DE-OS 25 08 233. In this document, a crank drive is described, the power transmitted to a drive pulley is braked with a certain force by means of a brake band. The corresponding power is determined from the adjustable braking torque and the angular speed of the drive pulley. In particular, FIG. 8 of this document shows such a crank drive in a bicycle ergometer. This power measurement device, however, has the disadvantage in connection with bicycles that the entire, at the crank to gripping power in heat and not in forward movement is implemented.
In einem besonderen Ausführungsbeispiel betrifft die Erfindung insbesondere die ortsgebundene Leistungsmessung an einem Fahr rad mit einem speziell hierfür konstruierten Tretlager und einem am Farrad befindlichen Computer zur Auswertung und Speicherung der gemessenen Werte. Ein Ausdruck der gemessenen Werte kann durch Anschluß des Computers an geeignete Drucker geschehen.In a particular embodiment, the invention relates in particular the local power measurement on a drive bike with a specially designed bottom bracket and a computer located on the bicycle for evaluation and storage of the measured values. The measured values can be printed out done by connecting the computer to suitable printers.
Bisher war die erbrachte Leistung eines Menschen auf einem Fahrrad nur stationär meßbar. Dabei wurde - wie beispielsweise in der obengenannten Deutschen Offenlegungsschrift 25 08 233 beschrieben - mit den Kurbeln über eine Antriebsscheibe in Form des Kettenblattes oder einer Riemenscheibe mittels Kette oder Riemen eine Schwungscheibe angetrieben, die durch eine Bremse, zum Beispiel eine Reibungs- oder Wirbelstrom-Bremse, gebremst wurde. Die Drehgeschwindigkeit der Schwungscheibe und die auf diese wirkende Bremskraft waren ein Maß für die er brachte Leistung.So far, a person's performance has been on one Bicycle can only be measured stationary. It was - such as in the above-mentioned German Offenlegungsschrift 25 08 233 described - with the cranks over a drive pulley in Shape of the chainring or a pulley using a chain or belt driven a flywheel by a Brake, for example a friction or eddy current brake, was slowed down. The speed of rotation of the flywheel and the braking force acting on this was a measure of which he performed.
Durch diese Art der Leistungsmessung ist eine nichtstationäre Erfassung der Leistungswerte des Menschen nicht möglich, denn es wird keine Energie in Vorwärtsbewegung umgesetzt.This type of performance measurement is non-stationary It is not possible to record human performance values because no energy is converted into forward movement.
Aufgabe der vorliegenden Erfindung ist es, eine Leistungs messungsvorrichtung der obengenannten Art zu erstellen, bei der die Leistungsmessung direkt am Kraftübertragungspunkt zwischen der an der Kurbel angreifenden Kraft und der Antriebs scheibe stattfindet, ohne daß vom Probanden erbrachte Leis tung nutzlos vernichtet und z. B. in Wärme umgewandelt wird. Vielmehr soll die aufgebrachte Leistung möglichst vollständig in kinetische Energie umgesetzt werden.The object of the present invention is to achieve a performance to create measuring device of the type mentioned above, at the power measurement directly at the power transmission point between the force acting on the crank and the drive disc takes place without any leis provided by the test person tion destroyed uselessly and z. B. is converted into heat. Rather, the service provided should be as complete as possible be converted into kinetic energy.
Diese Aufgabe wird dadurch gelöst, daß die an der Kurbel an greifende Kraft über ein Verformungselement auf die Antriebs scheibe übertragen wird, und die Verformung des Verformungsele mentes, die ein Maß für die angreifende Kraft ist, mittels Dehnmeßstreifen in das elektrische Signal umgewandelt wird, und daß die Winkelgeschwindigkeit der Kurbel mittels eines Magnet schalter, einer Lichtschranke, einer Induktionsschleife oder eines mechanischen Drehzahlmessers gemessen wird.This object is achieved in that the crank gripping force via a deformation element on the drive disc is transmitted, and the deformation of the deformation element mentes, which is a measure of the attacking force, by means of Strain gauge is converted into the electrical signal, and that the angular velocity of the crank by means of a magnet switch, a light barrier, an induction loop or a mechanical tachometer is measured.
Die Bestimmung von Kräften mittels Verformungselementen und die Bestimmung der Verformung dieser Verformungselemente mittels Dehnmeßstreifen ist an sich bekannt. Beispielsweise ist in der DE-OS 32 09 295 eine Lastmeßeinrichtung für Hebezeuge beschrieben, bei der ein C-förmiges Biegeelement, auf dessen Mittelsteg Dehnmeßstreifen appliziert sind, zur Bestimmung der an der Hakenflasche angreifenden Kraft dient. Ferner ist in der DE-OS 26 57 843 ein Drehmomentmeßsystem beschrieben. Zwar betrifft die Druckschrift keinen Kurbelantrieb wie vorliegende Erfindung, sondern die Übertragung von Drehmomenten mittels einer Welle. Zur Bestimmung der dabei auftretenden Drehmomente sind am Umfang einer Welle Dehnmeßstreifen appliziert, aus deren Meßsignal die Torsionsbeanspruchung der Welle bestimmt wird. Auch diese Welle kann als Verformungselement im Sinne des Anmeldegegenstandes aufgefaßt werden.The determination of forces using deformation elements and the determination of the deformation of these deformation elements by means of strain gauges is known per se. For example is a load measuring device for hoists in DE-OS 32 09 295 described in which a C-shaped bending element, on the Middle web strain gauges are applied to determine the force acting on the hook block. Furthermore, in DE-OS 26 57 843 describes a torque measuring system. Though the document does not concern a crank drive as the present one Invention, but the transmission of torque by means a wave. To determine the torques that occur strain gauges are applied to the circumference of a shaft whose measurement signal determines the torsional stress on the shaft becomes. This shaft can also be used as a deformation element in the sense of the subject of the application.
Ferner ist in der DE-GM 82 03 421 eine Vorrichtung zur Messung des Energieverbrauches, nicht jedoch der Leistung, beschrie ben, bei der aus der Verformung eines elastischen Stellglie des, z. B. einer Feder, und der durch die angreifende Kraft bewirkten Auslenkung dieses Stellgliedes, z. B. einer Zahn stange, die entsprechende Arbeit bestimmt wird (Arbeit = Kraft × Weg). In dieser Druckschrift ist auch erwähnt, daß schon einmal vorgeschlagen wurde, ein derartiges elastisches Stell glied in den Tretkurbelantrieb eines Fahrrades zu integrieren. Jedoch werden weitergehende Einzelheiten dieses Fahrrad-Tret kurbelantriebes nicht mitgeteilt.Furthermore, DE-GM 82 03 421 has a device for measurement the energy consumption, but not the performance ben, from the deformation of an elastic actuator of, e.g. B. a spring, and by the attacking force caused deflection of this actuator, for. B. a tooth bar, the corresponding work is determined (work = power × path). This publication also mentions that once proposed such an elastic actuator to integrate into the pedal crank drive of a bicycle. However, further details of this bike pedal will be given crank drive not communicated.
Weiterhin ist in der DE-OS 20 24 422 eine Meßkupplung beschrie ben, bei der zwischen einer Antriebswelle und dem Kupplungs teil eine Torsionsbuchse vorgesehen ist, auf der Dehnmeßstrei fen appliziert sind, um mit letzteren die Torsionsspannung und somit das übertragene Drehmoment zu bestimmen. Schließlich ist noch aus der US-PS 41 86 596 ein Verformungselement bekannt, das aus einer Scheibe besteht und beispielsweise ein Autolenkrad oder eine Autofelge sein kann. Diese Scheibe weist eine große Anzahl von Öffnungen auf, die alle den gleichen Abstand vom Scheibenmittelpunkt besitzen. Die zwischen den Öffnungen ste henbleibenden Stege dienen als Verformungselemente, auf denen ebenfalls Dehnmeßstreifen appliziert sind.Furthermore, a measuring coupling is described in DE-OS 20 24 422 ben, in the between a drive shaft and the clutch partly a torsion bushing is provided on the strain gauge fen are applied to the torsional stress and thus to determine the transmitted torque. Finally is still known from US-PS 41 86 596 a deformation element that consists of a disc and, for example, a car steering wheel or can be a car rim. This disc has a large one Number of openings, all the same distance from Have the center of the disc. The ste between the openings Steady webs serve as deformation elements on which strain gauges are also applied.
Bei der gemäß vorliegender Erfindung vorgeschlagenen Lei stungsmessung wird die erbrachte Leistung direkt am Tretlager eines Fahrrades gemessen. Die Tretkraft wird durch die Ver formung eines geeigneten Biegeelementes, auf dem Dehnmeß streifen appliziert sind, in ein elektrisches Signal umgewan delt und durch induktive Übertragung auf einen mit dem Fahr radrahmen verbundenen Empfänger übertragen. Die Tretgeschwin digkeit wird durch die Tretfrequenzmessung ermittelt. Beide Werte, Tretkraft und Tretgeschwindigkeit, werden in einem Microcomputer am Fahrrad verarbeitet, zur Anzeige gebracht und abgespeichert. In the Lei proposed according to the present invention The performance is measured directly at the bottom bracket measured on a bicycle. The pedaling force is determined by the ver Formation of a suitable bending element on the strain gauge strips are applied, converted into an electrical signal delt and by inductive transmission to one with the driver transmit frame connected receiver. The pedal speed cadence is determined by the cadence measurement. Both Values, pedaling power and pedaling speed are all in one Microcomputer processed on the bike, displayed and saved.
Dieser Leistungsmesser soll einerseits für Sportler, insbe sondere für Radsportler, eine entscheidende Hilfe bei der Ge staltung und Optimierung des Trainings sein. Mit diesem Ge rät ist es möglich, die Leistung direkt in bezug zur Herzfre quenz zu setzen und aus diesen beiden Fakten Schlüsse über die Effektivität, die Intensität und über den Trainingszu stand des Sportlers zu ziehen. Die Herzfrequenz kann schon seit längerer Zeit nichtstationär gemessen werden und ist aus diesem Grund Stand der Technik.This power meter should on the one hand for athletes, esp especially for cyclists, a crucial help with ge organization and optimization of the training. With this Ge advises it is possible to directly compare the performance to the heart rate quenz and to draw conclusions from these two facts the effectiveness, the intensity and the training stood to pull the athlete. The heart rate can have been measured stationary for a long time and is off state of the art for this reason.
Ferner kann dieser Leistungsmesser bei Patienten nach Entlas sung aus einer Rehabilitations-Klinik eingesetzt werden, weil die Messung der Belastungsintensität neben der Herzfrequenz messung die wichtigsten Daten über den Stand der Genesung liefert. Der Patient kann mit diesem Gerät selbständig ar beiten und ist nicht auf einen stationären Standleistungs ergometer beim Arzt angewiesen.Furthermore, this power meter can be used in patients after discharge solution from a rehabilitation clinic because the measurement of the exercise intensity in addition to the heart rate measurement the most important data about the state of recovery delivers. The patient can work independently with this device and is not based on a stationary performance ergometer instructed by a doctor.
Das Neue an diesem Gerät ist, daß nicht wie bisher die Lei stung anhand der Geschwindigkeit einer gebremsten Schwung scheibe bestimmt wird, sondern direkt am Kraftübertragungs punkt zwischen der an der Kurbel angreifenden Kraft und der Antriebsscheibe gemessen wird. Durch diese Messung geht keine Energie verloren und Fehler, die aufgrund von Übertragungs elementen auftreten, wie zum Beispiel bei Ketten- oder Rie menantrieb, als auch Fehler, die aus Reibungsverlusten resul tieren, werden vermieden.The new thing about this device is that the Lei is not as before performance based on the speed of a braked swing disc is determined, but directly on the power transmission point between the force acting on the crank and the Drive pulley is measured. This measurement does not work Energy lost and errors due to transmission elements occur, such as in chains or chains menantrieb, as well as errors resulting from friction losses animals are avoided.
Die Kraftmessung kann, beispielsweise bei einem Fahrrad, fol gendermaßen durchgeführt werden:The force measurement can, for example on a bicycle, fol be carried out in the following way:
- a) Tretlagerachse (7) und Kettenblätter (2) werden durch ein Kugellager (8) kraftmäßig getrennt. Die Kraftübertragung von der Kurbel (1) auf das Kettenblatt (2) erfolgt über einen Bie gebalken (3), auf dem eine Dehnmeßstreifenbrücke (6) appli ziert ist.a) Bottom bracket axle ( 7 ) and chainrings ( 2 ) are separated by a ball bearing ( 8 ). The power transmission from the crank ( 1 ) to the chainring ( 2 ) takes place via a bending beam ( 3 ) on which a strain gauge bridge ( 6 ) is adorned.
- b) Die Kraftmessung erfolgt direkt mit auf der Kurbel appli zierten Dehnmeßstreifen. b) The force is measured directly on the crank appli adorned strain gauges.
- c) Die Kraftmessung erfolgt mittels eines als Kraftaufnehmer konstruierten Kettenblattes (2) und darauf applizierten Dehn meßstreifen.c) The force is measured using a chainring ( 2 ) designed as a force transducer and strain gauges applied to it.
- d) Die Kraftmessung erfolgt mittels einer speziell hierfür konstruierten Torsionsbuchse (6) mit darauf applizierten Dehn meßstreifen (6).d) the force measurement is carried out by means of a specially constructed Torsionsbuchse (6) having applied thereto Dehn measuring strip (6).
Die Dehnmeßstreifen werden zu einer Wheatstone-Brücke ver schaltet.The strain gauges are ver to a Wheatstone bridge switches.
Die Verstärkung der Dehnmeßstreifen-Brückendiagonalspannung und die danach folgende Spannungsfrequenzwandlung, welche für die induktive Signalübertragung notwendig ist, findet direkt auf dem rotierenden Tretlager statt.The amplification of the strain gauge bridge diagonal voltage and the subsequent voltage frequency conversion, which for the inductive signal transmission is necessary takes place directly held on the rotating bottom bracket.
Als Stromquelle dient eine Trockenzelle oder ein Akku.A dry cell or a battery serves as the power source.
Die Signalübertragung vom rotierenden Tretlager auf den Rah men ist induktiv.The signal transmission from the rotating bottom bracket to the frame men is inductive.
Die Tretgeschwindigkeitsmessung und damit die Winkelgeschwin digkeitsbestimmung erfolgt mittels eines Magnetschalters, zum Beispiel Reedrelais, der am Rahmen angebracht ist. Er wird durch einen umlaufenden Magneten am rotierenden Teil des Tretlagers betätigt.The pedaling speed measurement and thus the angular speed didity is determined by means of a magnetic switch for Example reed relay attached to the frame. He will by a rotating magnet on the rotating part of the Bottom bracket pressed.
Die Tretgeschwindigkeitsmessung kann auch mit einer Licht schranke oder einer Induktionsschleife erfolgen.The pedaling speed measurement can also be done with a light barrier or an induction loop.
Die induktiv übertragene Frequenz, die proportional zur Tret kraft ist, wird auf eine für einen Mikrocomputer geeignete Form gebracht, und in diesen am Fahrrad eingelesen. Eine geeignete Form ist zum Beispiel Transistor-Transistor- Logik (TTL).The inductively transmitted frequency, which is proportional to the pedaling is suitable for a microcomputer Formed, and read into this on the bike. A suitable form is, for example, transistor-transistor Logic (TTL).
Das Gleiche erfolgt mit den Impulsen vom Magnetschalter, der Induktionsschleife oder von der Lichtschranke.The same happens with the pulses from the magnetic switch, the Induction loop or from the light barrier.
Der Mikrocomputer errechnet aus den eingelesenen Signalen die Leistung des Radfahrers. Sie kann dann direkt angezeigt oder auch zur späteren Auswertung abgespeichert werden. The microcomputer calculates the from the read signals Performance of the cyclist. It can then be displayed directly or can also be saved for later evaluation.
Neben diesen Daten können auch noch andere Parameter in den Mikrocomputer eingelesen werden, so zum Beispiel: Herzfrequenz, Fahrzeit, gefahrene Strecke und Fahrgeschwindigkeit.In addition to this data, other parameters can also be set in the Microcomputers can be read, for example: heart rate, Driving time, distance traveled and driving speed.
Aus diesen Daten können dann zum Beispiel folgende Werte er mittelt werden: Verbrauchte Energie, Durchschnittsleistung, Durchschnittsherzfrequenz und Durchschnittsgeschwindigkeit.The following values can then be obtained from this data, for example be averaged: consumed energy, average power, Average heart rate and average speed.
Der Vorteil gegenüber herkömmlichen Fahrradergometern besteht darin, daß die Leistung direkt und verlustfrei am Tretlager gemessen wird und nicht über die Drehzahl einer durch einen Riemen oder Wirbelstrom gebremsten Schwungscheibe. Dadurch ist dieser Fahrradergometer beim normalen Gebrauch eines Fahrrades einzusetzen.The advantage over conventional bicycle ergometers is in that the performance is direct and lossless on the bottom bracket is measured and not by the speed of one by one Belt or eddy current braked flywheel. This makes this bike ergometer in normal use of a bicycle.
Er ist deshalb nichtstationär und als kontinuierliche Lei stungskontrolle beim Fahrradfahren einsetzbar.It is therefore non-stationary and as a continuous lei control can be used when cycling.
Der nichtstationäre Leistungsmesser kann unter anderem bei der Rehabilitation Herz-Kreislaufkranker sowie von Lei stungssportlern eingesetzt werden.The non-stationary power meter can be used for cardiovascular rehabilitation and lei athletes are used.
Im folgenden wird anhand der Zeichnungen ein Ausführungsbei spiel im Detail beschrieben: (Es folgt eine detaillierte Be schreibung der Zeichnung).An embodiment will now be made with reference to the drawings game described in detail: (A detailed description follows writing of the drawing).
In den Figuren werden Ausführungsbeispiele der Erfindung er läutert. InEmbodiments of the invention are shown in the figures purifies. In
Fig. 1 ist ein Flußdiagramm für die Auswertung der von den Dehnmeßstreifen und dem Magnetschalter erhaltenen elek trischen Signale wiedergegeben (Anordnung zu Fig. 2). Fig. 1 is a flowchart for the evaluation of the electrical signals obtained from the strain gauges and the magnetic switch reproduced (arrangement for Fig. 2).
Fig. 2 zeigt die Übertragung der an der Kurbel (1) angreifen den Kraft (K) auf die Antriebsscheibe (2) mittels eines Biege balkens (3). Fig. 2 shows the transmission of the crank ( 1 ) attack the force (K) on the drive pulley ( 2 ) by means of a bending beam ( 3 ).
Fig. 3 zeigt ein teilweise im Schnitt gezeichnetes Tretla ger, bei dem als kraftübertragendes Verformungselement eine Torsionsbuchse (5) eingesetzt wird. Fig. 3 shows a partially drawn Tretla ger, in which a torsion bushing ( 5 ) is used as a force-transmitting deformation element.
Fig. 4 zeigt eine starr mit der Kurbelachse (7) verbundene Antriebsscheibe (2). Fig. 4 shows a drive pulley ( 2 ) rigidly connected to the crank axis ( 7 ).
Fig. 1: Die Wheatstone'sche Brücke aus Dehnmeßstreifen, die auf dem Biegebalken appliziert ist, wird durch eine Konstantstrom quelle gespeist. Alle vier Dehnmeßstreifen sind aktiv. Die Brückendiagonalspannung wird verstärkt und spannungs frequenzgewandelt. Diese, zur Tretkraft proportionale Fre quenz, wird mittels zweier Spulen auf den feststehenden Fahr radrahmen übertragen. Dabei fungiert eine Spule als Sender und die andere Spule als Empfänger. Beide Spulen liegen sich stirnseitig gegenüber. Die Tretlagerachse dient als Spulen kern. Die so, durch Gegeninduktion, übertragene Frequenz wird verstärkt, getriggert, durch den Faktor 2 geteilt und in ei nen Computer eingelesen. Fig. 1: The Wheatstone bridge made of strain gauges, which is applied to the bending beam, is fed by a constant current source. All four strain gauges are active. The bridge diagonal voltage is amplified and voltage converted. This frequency, which is proportional to the pedaling force, is transmitted to the stationary bicycle frame by means of two coils. One coil acts as a transmitter and the other coil as a receiver. Both coils face each other. The bottom bracket axis serves as a coil core. The frequency transmitted by mutual induction is amplified, triggered, divided by a factor of 2 and read into a computer.
Die Signale vom Magnetschalter, der durch einen auf dem ro tierenden Teil des Tretlagers befindlichen Magnet betätigt wird, werden getriggert, durch den Faktor 2 geteilt und auch in den am Fahrrad befindlichen Computer eingelesen.The signals from the magnetic switch, which are transmitted to the ro Acting part of the bottom bracket located magnet operated will be triggered, divided by the factor 2 and also read into the computer on the bike.
In dem Computer wird die restliche Signalverarbeitung durch geführt und die erhaltenen Werte abgespeichert.The rest of the signal processing is done in the computer managed and the values obtained saved.
Fig. 2: Die im Punkt (1 a) angreifende Tretkraft (K) vom rechten Pedal und die vom linken Pedal über die linke Kurbel und Tretlager achse (7) kommende Tretkraft werden in (V) vereint. Von dieser Stelle aus wird die Gesamttretkraft über Kettenglieder (4) und einen Biegebalken (3) auf die Antriebsscheibe (2) übertragen. Antriebsscheibe (2) und Tretlagerachse (7) sind durch ein Kuegel lager (8) entkoppelt, so daß die gesamte Tretkraft über den Biegebalken (3) geleitet wird. Auf diesem Biegebalken (3) ist eine Vollbrücke aus Dehnmeßstreifen (6) appliziert. Die signalverarbeitende elektronische Schaltung nach Fig. 1 befindet sich unterhalb des Biegebalkens (3) auf der Antriebs scheibe (2) S. Die Kettenglieder (4) übertragen nur Kräfte in einer Richtung, so daß auf den Biegebalken (3) keine unerwün schten Nebenkräfte einwirken, zum Beispiel eine seitliche Verbiegung. Die Kettenblätter für den Antrieb werden auf die Antriebsscheibe geschraubt. Fig. 2: The pedaling force (K ) attacking in point ( 1 a) from the right pedal and the pedaling force coming from the left pedal via the left crank and bottom bracket axis ( 7 ) are combined in (V) . From this point, the total pedal force is transmitted to the drive pulley ( 2 ) via chain links ( 4 ) and a bending beam ( 3 ). Drive pulley ( 2 ) and bottom bracket axle ( 7 ) are decoupled by a ball bearing ( 8 ), so that the entire pedal force is guided over the bending beam ( 3 ). A full bridge made of strain gauges ( 6 ) is applied to this bending beam ( 3 ). The signal processing electronic circuit shown in FIG. 1 is located below the bending beam (3) on the drive pulley (2) S. The chain links ( 4 ) only transmit forces in one direction, so that no undesired secondary forces act on the bending beam ( 3 ), for example a lateral deflection. The chainrings for the drive are screwed onto the drive pulley.
Fig. 3: Das Drehmoment, das von beiden Kurbeln rechts und links der Tretlagerachse (7) kommt, wird in (13) vereint. Von dort wird es über eine Torsionsbuchse (5) auf die Antriebsscheibe (2) geleitet. Auf der Torsionsbuchse (5) und auf der Tretla gerachse (7) befinden sich Dehnmeßstreifen (6). Die Dehnung der Drehmeßstreifen auf der Torsionsbuchse (5) ist proportional zur Gesamttretkraft, die Dehnung der Dehnmeßstreifen auf der Tretlagerachse (7) ist proportional zur Tretkraft des rechten Beines. Durch diese Anordnung lassen sich unterschiedliche Belastungen der Beine feststellen. Die Tretlagerachse (7) wird durch die beiden Kugellager (10) und die Nadellager (9) gelagert. An der Stelle (13) ist die Torsionsbuchse (5) auf die Tretla gerachse (7) geschraubt. (11) ist das Tretlagergehäuse im Rahmen. Die signalverarbeitende Schaltung und die Übertra gungseinheit befinden sich im Freiraum (12). Fig. 3: The torque that comes from both cranks on the right and left of the bottom bracket axle ( 7 ) is combined in ( 13 ). From there it is directed to the drive pulley ( 2 ) via a torsion bush ( 5 ). On the torsion bush ( 5 ) and on the pedal axle ( 7 ) there are strain gauges ( 6 ). The stretch of the torsion gauges on the torsion bush ( 5 ) is proportional to the total pedal force, the stretch of the strain gauges on the bottom bracket axis ( 7 ) is proportional to the pedaling force of the right leg. With this arrangement, different loads on the legs can be determined. The bottom bracket axle ( 7 ) is supported by the two ball bearings ( 10 ) and the needle bearings ( 9 ). At the point ( 13 ) the torsion bush ( 5 ) on the pedal axle ( 7 ) is screwed. ( 11 ) is the bottom bracket shell in the frame. The signal processing circuit and the transmission unit are in the free space ( 12 ).
Der obere Teil der Figur ist geschnitten.The upper part of the figure is cut.
Fig. 4: Bei dieser Ausführung befinden sich in der Antriebsscheibe (2) Aussparungen (13). Die Stege (3) zwischen den Aussparungen (13) dienen als Biegeelemente, auf die die Dehnmeßstreifen (6) ap pliziert sind. Tretlagerachse (7), Kurbel (1) und Antriebs scheibe (2) sind starr verbunden. Die signalverarbeitende elektronische Schaltung und die Stromversorgung, zum Beispiel ein Akku, befinden sich in den Aussparungen (13) der Antriebs scheibe. Fig. 4: In this embodiment there are recesses ( 13 ) in the drive pulley ( 2 ). The webs ( 3 ) between the recesses ( 13 ) serve as bending elements onto which the strain gauges ( 6 ) are applied. Bottom bracket axle ( 7 ), crank ( 1 ) and drive disc ( 2 ) are rigidly connected. The signal processing electronic circuit and the power supply, for example a battery, are located in the recesses ( 13 ) of the drive disc.
Die Aussparungen können auch anderen als kreisförmigen Quer schnitt haben.The recesses can also be other than circular cross have cut.
Die vorliegende Erfindung ist in keiner Weise auf die Anwen dung gemäß den Ausführungsbeispielen beschränkt, sondern läßt sich bei jeder Art von Kurbelantrieb anwenden.The present invention is in no way applicable to the applicants limited according to the embodiments, but lets apply to any type of crank drive.
Claims (10)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3722728A DE3722728C1 (en) | 1987-07-09 | 1987-07-09 | Work meter for a crank drive |
DE19873738104 DE3738104A1 (en) | 1987-07-09 | 1987-11-10 | ENCLOSURE FOR A DEVICE |
PCT/EP1988/000601 WO1989000401A1 (en) | 1987-07-09 | 1988-07-06 | Powermeter for a crank drive |
EP88907044A EP0386005B1 (en) | 1987-07-09 | 1988-07-06 | Powermeter for a crank drive |
DE3855182T DE3855182D1 (en) | 1987-07-09 | 1988-07-06 | PERFORMANCE METER FOR A CRANKSHAFT |
AU20859/88A AU2085988A (en) | 1987-07-09 | 1988-07-06 | Powermeter for a crank drive |
AT88907044T ATE136206T1 (en) | 1987-07-09 | 1988-07-06 | POWER METER FOR A CRANK DRIVE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3722728A DE3722728C1 (en) | 1987-07-09 | 1987-07-09 | Work meter for a crank drive |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3722728C1 true DE3722728C1 (en) | 1988-12-08 |
Family
ID=6331251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3722728A Expired DE3722728C1 (en) | 1987-07-09 | 1987-07-09 | Work meter for a crank drive |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3722728C1 (en) |
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DE4435174A1 (en) * | 1994-09-19 | 1996-03-21 | Wolfgang Petzke | Force and power determination system for measuring force and power applied e.g at bicycle crank |
FR2724728A1 (en) * | 1994-09-19 | 1996-03-22 | Petzke Wolfgang | Measuring system for determining force and power applied e.g at bicycle crank |
DE19547684A1 (en) * | 1995-12-20 | 1997-06-26 | Philips Patentverwaltung | Method and arrangement for contactless transmission |
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DE19617959C1 (en) * | 1996-05-06 | 1997-10-23 | Werner K Dipl Ing Mayer | Pedal force detection device for bicycle with electric motor |
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FR2755373A1 (en) * | 1996-11-07 | 1998-05-07 | Mavic Sa | SYSTEM FOR INDICATING OR RECORDING PARAMETERS REPRESENTING THE PHYSICAL CONDITION OF A CYCLIST, PARTICULARLY FOR TRAINING AID |
AT2268U1 (en) * | 1997-09-10 | 1998-07-27 | Egston Eggenburger Syst Elektr | DEVICE FOR SPEED / TORQUE DETECTION ON A BICYCLE |
DE19917626A1 (en) * | 1999-04-19 | 2000-10-26 | Mayr Christian Gmbh & Co Kg | Torque measurement device, especially for shaft compensation or overload couplings, has rotor with analogue torque signal monitor circuit generating signal if torque threshold reached |
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DE102004015771A1 (en) * | 2004-03-31 | 2005-10-27 | Hottinger Baldwin Messtechnik Gmbh | Arrangement for torque measurement of rotating machine parts |
EP1718942A2 (en) * | 2004-02-17 | 2006-11-08 | Gregory T. Lanham | Load measurement apparatus and methods utilizing torque sensitive link for pedal powered devices |
DE102005052445A1 (en) * | 2005-11-03 | 2007-05-16 | Poddey Alexander | Method for operating a training device |
US7257468B1 (en) | 2005-03-04 | 2007-08-14 | George Costa | Apparatus and method for measuring dynamic parameters for a driven wheel |
DE102007040016A1 (en) | 2007-08-24 | 2009-02-26 | Schaeffler Kg | Method and device for measuring force, torque and power on an ergometer or bicycle |
DE202009000329U1 (en) | 2009-01-08 | 2009-03-26 | Nemcomed Gmbh Medizin + Wellness | ergometer |
DE202009001463U1 (en) | 2009-02-06 | 2009-04-30 | Momes Llp | Device for measuring and determining the force, the moments and the power at a (pedal) crank |
EP2165171A1 (en) | 2007-07-06 | 2010-03-24 | Fisher, Mark | Crank arm with strain amplifier |
EP2206535A1 (en) | 2009-01-08 | 2010-07-14 | Nemcomed GmbH Medizin + Wellness | Ergometer for underwater use with torque sensor |
US7775128B2 (en) | 2008-09-04 | 2010-08-17 | Saris Cycling Group, Inc. | Cassette-based power meter |
EP1978342A3 (en) * | 2007-04-02 | 2010-12-29 | CAMPAGNOLO S.r.l. | Instrument-equipped bicycle component and detection unit for equipping such a component |
US8011242B2 (en) | 2008-07-29 | 2011-09-06 | Garmin Switzerland Gmbh | System and device for measuring and analyzing forces applied by a cyclist on a pedal of a bicycle |
DE102010023355A1 (en) | 2010-06-10 | 2011-12-15 | Schaeffler Technologies Gmbh & Co. Kg | Arrangement for measuring rotational torque applied by rider of pedelec for propulsion of pedelec, has Hall-sensors detecting ends that exhibit respective distances to axis, where one of distances differs from other distance |
DE102010026810A1 (en) | 2010-07-10 | 2012-01-12 | Schaeffler Technologies Gmbh & Co. Kg | Electrical bicycle, has control device electrically connected to measuring arrangement for controlling electric motor depending on measured quantity, and measuring arrangement comprising deformation sensor |
DE102010027010A1 (en) | 2010-07-13 | 2012-01-19 | Schaeffler Technologies Gmbh & Co. Kg | Method for determining effective rotational torque introduced on e.g. chain, of electrical bicycle, involves detecting chain traction force so as to determine rotational torque from traction force and geometric size of driving unit |
EP2380806A3 (en) * | 2010-04-21 | 2012-10-10 | Daum GmbH & Co. KG | Power transmission unit |
US8336400B2 (en) | 2009-11-24 | 2012-12-25 | Saris Cycling Group, Inc. | Rear hub power meter for a bicycle |
DE102012008476A1 (en) * | 2012-04-26 | 2013-10-31 | Rainer Oberheim | Crank for determining pedaling power with resilient executed pedal mount, has pedal mount that is connected over spring bars, so that measurable rotating movements are limited during pedaling on movement toward propulsion force vector |
WO2013167115A1 (en) * | 2012-05-11 | 2013-11-14 | Rolf Strothmann | Vehicle, particularly a bicycle, comprising an electrical auxiliary drive |
US8632050B2 (en) | 2007-08-04 | 2014-01-21 | Schaeffler Technologies AG & Co. KG | Electromagnetic actuating unit |
DE102012214332A1 (en) * | 2012-08-10 | 2014-02-13 | Nctengineering Gmbh | Crank drive for bicycles, has sensor device for detecting torsion of pedal crankshaft between one and third axial portion of pedal crankshaft, where another sensor device detects torsion of sleeve |
JP2014509574A (en) * | 2011-04-01 | 2014-04-21 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Bicycle crank drive |
JP2014509573A (en) * | 2011-04-01 | 2014-04-21 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Bicycle crank drive |
DE102012022447A1 (en) | 2012-11-16 | 2014-05-22 | Storck Bicycle Gmbh | Crank arm, crankset and power measuring device for an at least partially muscle-driven vehicle or exercise machine with a crank drive |
WO2014184485A1 (en) | 2013-05-14 | 2014-11-20 | Sensix | Bicycle pedal provided with at least one sensor |
DE102014218695A1 (en) * | 2014-09-17 | 2016-03-17 | Continental Teves Ag & Co. Ohg | Treadmill detection on the chainring |
DE102015224666A1 (en) * | 2015-12-09 | 2017-06-14 | Robert Bosch Gmbh | Method and device for distinguishing between left and right pedal force |
DE102017213221A1 (en) | 2017-08-01 | 2019-02-07 | Zf Friedrichshafen Ag | Determination of the twisting component of the torques acting on a shaft |
DE102021122525A1 (en) | 2021-08-31 | 2023-03-02 | Delta Force Solutions GmbH | bottom bracket and vehicle |
DE102022115941B3 (en) | 2022-06-27 | 2023-11-16 | Porsche Ebike Performance Gmbh | Bicycle bottom bracket assembly |
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Cited By (63)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0412780A3 (en) * | 1989-08-11 | 1991-12-27 | John Kirby | Method and apparatus for measuring vehicle power |
EP0412780A2 (en) * | 1989-08-11 | 1991-02-13 | John Kirby | Method and apparatus for measuring vehicle power |
DE4229569C1 (en) * | 1992-09-04 | 1994-02-24 | Weidmueller Interface | Machine tool with telemetry monitoring system for tool shaft - uses sensor element attached to shaft and coupled to amplifier on outside of housing half shell enclosing shaft |
DE4435174C2 (en) * | 1994-09-19 | 2002-08-08 | Wolfgang Petzke | Device for recording the applied forces and power on a crank |
DE4435174A1 (en) * | 1994-09-19 | 1996-03-21 | Wolfgang Petzke | Force and power determination system for measuring force and power applied e.g at bicycle crank |
FR2724728A1 (en) * | 1994-09-19 | 1996-03-22 | Petzke Wolfgang | Measuring system for determining force and power applied e.g at bicycle crank |
DE19547684A1 (en) * | 1995-12-20 | 1997-06-26 | Philips Patentverwaltung | Method and arrangement for contactless transmission |
DE19601194A1 (en) * | 1996-01-15 | 1997-07-24 | Michael Stamm | Controlling slave drive depending on power of master drive to satisfy StVZO for bicycle, vehicle |
DE19627402A1 (en) * | 1996-05-06 | 1997-11-13 | Werner K Dipl Ing Mayer | Device for detecting the driving force of a device operated by muscle power |
DE19627402C2 (en) * | 1996-05-06 | 1998-03-19 | Werner K Dipl Ing Mayer | Device for detecting the driving force of a device operated by muscle power |
DE19617959C1 (en) * | 1996-05-06 | 1997-10-23 | Werner K Dipl Ing Mayer | Pedal force detection device for bicycle with electric motor |
FR2755373A1 (en) * | 1996-11-07 | 1998-05-07 | Mavic Sa | SYSTEM FOR INDICATING OR RECORDING PARAMETERS REPRESENTING THE PHYSICAL CONDITION OF A CYCLIST, PARTICULARLY FOR TRAINING AID |
EP0841079A2 (en) * | 1996-11-07 | 1998-05-13 | Mavic S.A. | Indication or registration system for physical condition-related parameters of a cyclist |
EP0841079A3 (en) * | 1996-11-07 | 1998-07-15 | Mavic S.A. | Indication or registration system for physical condition-related parameters of a cyclist |
AT2268U1 (en) * | 1997-09-10 | 1998-07-27 | Egston Eggenburger Syst Elektr | DEVICE FOR SPEED / TORQUE DETECTION ON A BICYCLE |
DE19917626A1 (en) * | 1999-04-19 | 2000-10-26 | Mayr Christian Gmbh & Co Kg | Torque measurement device, especially for shaft compensation or overload couplings, has rotor with analogue torque signal monitor circuit generating signal if torque threshold reached |
NL1016294C2 (en) * | 1999-10-19 | 2002-04-02 | Idbike | Measurement of force exerted by cyclist, involves computing level of torque exerted by rider on pedals by signal processor based on signal output from sensor attached to frame of bicycle to measure frame deformation |
EP1718942A2 (en) * | 2004-02-17 | 2006-11-08 | Gregory T. Lanham | Load measurement apparatus and methods utilizing torque sensitive link for pedal powered devices |
EP1718942A4 (en) * | 2004-02-17 | 2007-10-03 | Forza Inc | Load measurement apparatus and methods utilizing torque sensitive link for pedal powered devices |
DE102004015771B4 (en) * | 2004-03-31 | 2006-04-13 | Hottinger Baldwin Messtechnik Gmbh | Arrangement for torque measurement of rotating machine parts |
DE102004015771A1 (en) * | 2004-03-31 | 2005-10-27 | Hottinger Baldwin Messtechnik Gmbh | Arrangement for torque measurement of rotating machine parts |
US7257468B1 (en) | 2005-03-04 | 2007-08-14 | George Costa | Apparatus and method for measuring dynamic parameters for a driven wheel |
DE102005052445B4 (en) * | 2005-11-03 | 2009-07-30 | Poddey, Alexander | Method for operating a training device |
DE102005052445A1 (en) * | 2005-11-03 | 2007-05-16 | Poddey Alexander | Method for operating a training device |
US7861599B2 (en) | 2007-04-02 | 2011-01-04 | Campagnolo, S.R.L. | Instrument-equipped bicycle component and detection unit for equipping such a component |
EP1978342A3 (en) * | 2007-04-02 | 2010-12-29 | CAMPAGNOLO S.r.l. | Instrument-equipped bicycle component and detection unit for equipping such a component |
CN101279630B (en) * | 2007-04-02 | 2012-11-28 | 坎培诺洛有限公司 | Instrument-equipped bicycle component and detection unit for equipping such a component |
EP2165171A1 (en) | 2007-07-06 | 2010-03-24 | Fisher, Mark | Crank arm with strain amplifier |
US8632050B2 (en) | 2007-08-04 | 2014-01-21 | Schaeffler Technologies AG & Co. KG | Electromagnetic actuating unit |
WO2009026873A1 (en) * | 2007-08-24 | 2009-03-05 | Schaeffler Kg | Method and device for measuring force, torque and output on an ergometer or bicycle |
US8316709B2 (en) | 2007-08-24 | 2012-11-27 | Schaeffler Technologies AG & Co. KG | Method and device for measuring force, torque and output on an ergometer or bicycle |
DE102007040016A1 (en) | 2007-08-24 | 2009-02-26 | Schaeffler Kg | Method and device for measuring force, torque and power on an ergometer or bicycle |
CN101784308B (en) * | 2007-08-24 | 2011-11-30 | 谢夫勒两合公司 | Method and device for measuring force, torque and output on an ergometer or bicycle |
US8011242B2 (en) | 2008-07-29 | 2011-09-06 | Garmin Switzerland Gmbh | System and device for measuring and analyzing forces applied by a cyclist on a pedal of a bicycle |
US7775128B2 (en) | 2008-09-04 | 2010-08-17 | Saris Cycling Group, Inc. | Cassette-based power meter |
US8141438B2 (en) | 2008-09-04 | 2012-03-27 | Saris Cycling Group, Inc. | Cassette-based power meter |
EP2206535A1 (en) | 2009-01-08 | 2010-07-14 | Nemcomed GmbH Medizin + Wellness | Ergometer for underwater use with torque sensor |
DE202009000329U1 (en) | 2009-01-08 | 2009-03-26 | Nemcomed Gmbh Medizin + Wellness | ergometer |
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DE102009004397B4 (en) * | 2009-01-08 | 2014-06-05 | Markus M. Scherer | ergometer |
DE202009001463U1 (en) | 2009-02-06 | 2009-04-30 | Momes Llp | Device for measuring and determining the force, the moments and the power at a (pedal) crank |
US8336400B2 (en) | 2009-11-24 | 2012-12-25 | Saris Cycling Group, Inc. | Rear hub power meter for a bicycle |
EP2380806A3 (en) * | 2010-04-21 | 2012-10-10 | Daum GmbH & Co. KG | Power transmission unit |
DE102010023355A1 (en) | 2010-06-10 | 2011-12-15 | Schaeffler Technologies Gmbh & Co. Kg | Arrangement for measuring rotational torque applied by rider of pedelec for propulsion of pedelec, has Hall-sensors detecting ends that exhibit respective distances to axis, where one of distances differs from other distance |
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DE102012008476A1 (en) * | 2012-04-26 | 2013-10-31 | Rainer Oberheim | Crank for determining pedaling power with resilient executed pedal mount, has pedal mount that is connected over spring bars, so that measurable rotating movements are limited during pedaling on movement toward propulsion force vector |
US9540069B2 (en) | 2012-05-11 | 2017-01-10 | Rolf Strothmann | Vehicle, particularly a bicycle, comprising an electrical auxiliary drive |
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DE102012214332A1 (en) * | 2012-08-10 | 2014-02-13 | Nctengineering Gmbh | Crank drive for bicycles, has sensor device for detecting torsion of pedal crankshaft between one and third axial portion of pedal crankshaft, where another sensor device detects torsion of sleeve |
DE102012022447A1 (en) | 2012-11-16 | 2014-05-22 | Storck Bicycle Gmbh | Crank arm, crankset and power measuring device for an at least partially muscle-driven vehicle or exercise machine with a crank drive |
US9459167B2 (en) | 2012-11-16 | 2016-10-04 | Storck Bicycle Gmbh | Crank arm, crankset, and power measuring device for an at least partially human powered vehicle or training device with a crank drive |
WO2014184485A1 (en) | 2013-05-14 | 2014-11-20 | Sensix | Bicycle pedal provided with at least one sensor |
DE102014218695A1 (en) * | 2014-09-17 | 2016-03-17 | Continental Teves Ag & Co. Ohg | Treadmill detection on the chainring |
DE102015224666A1 (en) * | 2015-12-09 | 2017-06-14 | Robert Bosch Gmbh | Method and device for distinguishing between left and right pedal force |
DE102015224666B4 (en) | 2015-12-09 | 2022-07-14 | Robert Bosch Gmbh | Method and device for distinguishing between left and right pedal forces |
DE102017213221A1 (en) | 2017-08-01 | 2019-02-07 | Zf Friedrichshafen Ag | Determination of the twisting component of the torques acting on a shaft |
DE102021122525A1 (en) | 2021-08-31 | 2023-03-02 | Delta Force Solutions GmbH | bottom bracket and vehicle |
WO2023031145A2 (en) | 2021-08-31 | 2023-03-09 | Delta Force Solutions GmbH | Bottom bracket bearing and vehicle |
WO2023031145A3 (en) * | 2021-08-31 | 2023-04-27 | Delta Force Solutions GmbH | Bottom bracket bearing and vehicle |
DE102022115941B3 (en) | 2022-06-27 | 2023-11-16 | Porsche Ebike Performance Gmbh | Bicycle bottom bracket assembly |
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