DE4222373A1 - Distance and speed meter for sportsmen - derives speed and distance by integration of measured acceleration using sensor without external source - Google Patents
Distance and speed meter for sportsmen - derives speed and distance by integration of measured acceleration using sensor without external sourceInfo
- Publication number
- DE4222373A1 DE4222373A1 DE4222373A DE4222373A DE4222373A1 DE 4222373 A1 DE4222373 A1 DE 4222373A1 DE 4222373 A DE4222373 A DE 4222373A DE 4222373 A DE4222373 A DE 4222373A DE 4222373 A1 DE4222373 A1 DE 4222373A1
- Authority
- DE
- Germany
- Prior art keywords
- measuring device
- sensor
- acceleration
- speed
- distance
- 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.)
- Withdrawn
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C22/00—Measuring distance traversed on the ground by vehicles, persons, animals or other moving solid bodies, e.g. using odometers, using pedometers
- G01C22/006—Pedometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
- G01C21/16—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
- G01C21/183—Compensation of inertial measurements, e.g. for temperature effects
- G01C21/185—Compensation of inertial measurements, e.g. for temperature effects for gravity
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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
- B62J45/414—Acceleration sensors
-
- 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
- B62J50/00—Arrangements specially adapted for use on cycles not provided for in main groups B62J1/00 - B62J45/00
- B62J50/20—Information-providing devices
- B62J50/21—Information-providing devices intended to provide information to rider or passenger
- B62J50/22—Information-providing devices intended to provide information to rider or passenger electronic, e.g. displays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
- G01D1/12—Measuring arrangements giving results other than momentary value of variable, of general application giving a maximum or minimum of a value
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/028—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure
- G01D3/036—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure on measuring arrangements themselves
- G01D3/0365—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups mitigating undesired influences, e.g. temperature, pressure on measuring arrangements themselves the undesired influence being measured using a separate sensor, which produces an influence related signal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P7/00—Measuring speed by integrating acceleration
Abstract
Description
Die Erfindung betrifft ein Meßgerät für Sportler, wie Skifahrer, Surfer, Segler, Radfahrer etc., nach dem Oberbegriff des Anspruchs 1.The invention relates to a measuring device for athletes, such as Skiers, surfers, sailors, cyclists etc., according to the Preamble of claim 1.
In vielen Sportarten ist es einerseits zur Trainingskontrolle und andererseits aus persönlichem Interesse des Sportlers wünschenswert, genaue Angaben über die Geschwindigkeit und/oder den zurückgelegten Weg während der sportlichen Betätigung zu erhalten. Auch spezielle Werte, wie Durchschnitts- oder Spitzengeschwindigkeit, sind für Sportler von großem Interesse.In many sports it is on the one hand for training control and on the other hand out of the athlete's personal interest desirable, accurate information about the speed and / or the distance covered during the athletic To get activity. Also special values like Average or top speed are for athletes of great interest.
Aus diesem Grund gibt es beispielsweise für Radfahrer bereits Meßgeräte, die am Lenker befestigt werden und dem Radfahrer zu jeder Zeit die gewünschten Daten über ein Ablesegerät zugänglich machen. In der Regel verfügen diese Meßgeräte über einen induktiven Sensor, der mit einem an einem Rad befestigten Magneten als externe Referenzquelle zusammenwirkt. Der fest an der Gabel befindliche Sensor mißt die Anzahl der Radumdrehungen und berechnet die gewünschten Daten in einer Auswerteeinheit. Um Aussagen über die Geschwindigkeit treffen zu können, verfügt ein solches Meßgerät außerdem über eine Uhr. Als weitere Komponenten sind in derartigen Gegenständen eine Speichereinheit, eine Anzeige, eine Batterie oder ein Akku sowie Bedienungselemente vorhanden.For this reason, there is already one for cyclists, for example Measuring devices that are attached to the handlebar and the cyclist the desired data at any time via a reading device make available. As a rule, these measuring devices have an inductive sensor with one on a wheel attached magnets as an external reference source cooperates. The sensor, which is firmly attached to the fork, measures the number of wheel revolutions and calculates the desired one Data in an evaluation unit. To make statements about the To be able to hit speed is one of them Measuring device also via a clock. As additional components are in such objects a storage unit, a Display, a battery or a rechargeable battery and controls available.
Ein derartiges Meßgerät hat den Nachteil, daß es eine externe Referenzquelle benötigt. Die Verwendung einer externen Referenzquelle bereitet jedoch im allgemeinen große Schwierigkeiten, da in der Regel eine feste Bezugsgröße, wie beispielsweise ein Laufrad am Sportgerät, nicht zur Verfügung steht.Such a measuring device has the disadvantage that it is an external one Reference source needed. The use of an external However, reference source generally prepares large Difficulties, as a rule, such as a fixed reference for example, a wheel on the sports equipment, not available stands.
Aufgabe der vorliegenden Erfindung ist es daher, ein Meßgerät für Sportler zur Messung von Geschwindigkeit und/oder zurückgelegtem Weg vorzuschlagen, das ohne externe Referenzquelle auskommt.The object of the present invention is therefore a measuring device for athletes to measure speed and / or to propose the route covered without external Reference source.
Diese Aufgabe wird ausgehend von einem Meßgerät der einleitend bezeichneten Art durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This task is based on a measuring device initially designated type by the characteristic Features of claim 1 solved.
Demgemäß wird ein erfindungsgemäßes Meßgerät dadurch realisiert, daß als Sensor ein Beschleunigungssensor verwendet wird. Derartige Sensoren arbeiten nach dem Prinzip der Massenträgheit und benötigen somit keine externe Referenzquelle.Accordingly, a measuring device according to the invention realizes that as an acceleration sensor is used. Such sensors work on the principle inertia and therefore do not need an external Reference source.
Durch gleichzeitiges Erfassen der Zeit wird die Bestimmung der Geschwindigkeit bzw. des zurückgelegten Weges aus ein- oder zweimaliger Integration der Beschleunigung über die Zeit ermöglicht. Eine entsprechend ausgeführte Auswerteeinheit, die die Beschleunigung als Funktion der Zeit erfaßt, ist somit in der Lage, die Geschwindigkeit oder den zurückgelegten Weg zu ermitteln und über die Anzeige zur Ablesung aus zugeben.By simultaneously recording the time, the determination the speed or the distance traveled from or integrating acceleration twice over time enables. A correspondingly designed evaluation unit, which is the acceleration as a function of time thus able to control the speed or the to determine the distance traveled and via the display to Admit reading.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Meßgeräts möglich.By the measures listed in the subclaims advantageous further developments and improvements of the Main claim specified measuring device possible.
So sind für ein erfindungsgemäßes Meßgerät Sensoren besonders geeignet, in denen als träge Masse ein vorgespannter piezoelektrischer oder piezoresistiver Kristall verwendet wird. Durch das piezoelektrische Signal oder durch die Änderung des piezoresistiven Widerstands aufgrund der Einwirkung der Beschleunigung auf den Kristall wird diese auf direktem Wege in ein elektrisches Signal umsetzbar.So sensors are special for a measuring device according to the invention suitable in which a preloaded inert mass piezoelectric or piezoresistive crystal used becomes. By the piezoelectric signal or by the Change in piezoresistive resistance due to Exposure to acceleration on the crystal will affect it convertible directly into an electrical signal.
Eine weitere Möglichkeit, ein elektrisches Signal für die Beschleunigung zu erhalten, stellt die Kopplung einer trägen Masse mit einem kapazitiven Element dar. Hierbei wird die Einwirkung einer trägen Masse als Kapazitätsänderung des kapazitiven Elements meßbar.Another way to get an electrical signal for that Getting acceleration represents the coupling of a sluggish one Mass with a capacitive element. Here, the Impact of an inertial mass as a change in capacity of the capacitive element measurable.
Um mehrere Komponenten des Beschleunigungsvektors zu erfassen, sind mehrere Beschleunigungssensoren nötig. Diese müssen derartig ausgerichtet sein, daß ihre Richtungsvektoren im Sinne der Vektoralgebra voneinander linear unabhängig sind.To add several components of the acceleration vector capture, several acceleration sensors are required. This must be aligned in such a way that their direction vectors linearly independent of each other in the sense of vector algebra are.
Da die Durchschnitts- bzw. Spitzengeschwindigkeiten für einen Sportler von besonderem Interesse sind, empfiehlt es sich, die Auswerte- bzw. Speichereinheit so auszubilden und aufeinander abzustimmen, daß diese Größen ermittelbar sind.Since the average or top speeds for one Athletes are of particular interest, it is recommended to design the evaluation or storage unit and to coordinate with one another that these variables can be determined.
Nicht immer ist es möglich, ein erfindungsgemäßes Meßgerät ohne Beeinträchtigung der Bewegung des Sportlers in dessen Sichtfeld anzubringen. Hier ist es von besonderem Vorteil, das Anzeigegerät als separates Gerät auszubilden und die benötigten Anzeigewerte drahtlos von der Auswerteeinheit zur Anzeige zu übermitteln. Das Anzeigegerät kann dann ähnlich einer Armbanduhr getragen werden, während das eigentliche Meßgerät am Sportgerät, beispielsweise an einem Ski, befestigt wird.It is not always possible to use a measuring device according to the invention without impairing the movement of the athlete in it Field of vision. It is particularly advantageous here train the display device as a separate device and the required display values wirelessly from the evaluation unit to Submit advertisement. The display device can then be similar a wrist watch can be worn while the actual Measuring device on sports equipment, for example on a ski, is attached.
Um Fehlereinflüssen aufgrund der Einwirkung der Gravitationskraft auf die träge Masse des Beschleunigungssensors vorzubeugen, empfiehlt sich die Erfassung der räumlichen Lage des Meßsystems. Hierfür kann bin Kreiselkompaß oder ein Lotsensor vorgesehen werden. Die hierdurch erfaßte räumliche Lage des Meßsystems kann dann in die Ermittlung der gewünschten Daten anhand der Sensorsignale einbezogen werden.To influence errors due to the influence of Gravitational force on the inert mass of the To prevent acceleration sensor, we recommend Detection of the spatial position of the measuring system. For this can A gyrocompass or a plumb sensor can be provided. The the spatial position of the measuring system detected in this way can then be in the determination of the desired data based on the sensor signals be included.
Auch ein zusätzlicher Beschleunigungssensor kann zur Erfassung der Erdbeschleunigung verwendet werden.An additional acceleration sensor can also be used Gravitational acceleration detection can be used.
Zur Verwendung bei unterschiedlichen und unter Umständen auch schwankenden Wetterverhältnissen ist eine Temperaturkompensation des Meßgeräts empfehlenswert. Ggf. muß hierzu ein Temperaturfühler eingebaut werden.For use with different and possibly also fluctuating weather conditions is one Temperature compensation of the measuring device is recommended. Possibly. got to a temperature sensor can be installed for this purpose.
Querbeschleunigungen, wie beispielsweise die Erdbeschleunigung, können durch entsprechende Ausbildung der Auswerteeinheit ebenfalls kompensiert werden.Lateral accelerations, such as the Acceleration due to gravity can be achieved through appropriate training Evaluation unit can also be compensated.
Kurzzeitige Störbewegungen, die für das Meßergebnis nicht von Interesse sind, beispielsweise die auf und ab Bewegungen innerhalb einer Buckelpiste eines Ski, können durch Mittelung der Meßdaten über eine geeignete Zeitbasis rechnerisch herausgefiltert werden. Diese Methode ist bei allen kurzzeitigen Störeinflüssen, die in ihrer Richtung und Größe zufällig verteilt sind, anwendbar. Short-term disturbing movements that are not relevant for the measurement result Are interested, for example, the up and down movements within a mogul slope of a ski, can be averaged the measured data over a suitable time base be filtered out. This method is common to everyone short-term interferences in their direction and size are randomly distributed, applicable.
Für periodische Störbewegungen innerhalb bestimmter Frequenzbereiche, beispielsweise Vibrationen, können entsprechende Frequenzfilter vorgesehen werden.For periodic disturbance movements within certain Frequency ranges, for example vibrations, can appropriate frequency filters are provided.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is in the drawing shown and in the following description explained.
Die beiden Figuren stellen anhand von Blockdiagrammen schematisch die Funktionsweise zweier Ausführungsbeispiele der Erfindung dar.The two figures represent using block diagrams schematically the operation of two Embodiments of the invention.
In Fig. 1 ist ein Beschleunigungssensor 1 in Verbindung mit einer Auswerteeinheit 2 und einer Speichereinheit 3 dargestellt. Eine Uhr 4, eine Batterie 5 und eine Anzeige 6 sind ebenfalls vorhanden. Außer der Anzeige 6 sind noch Bedienungselemente 7 zur Betätigung des Meßgeräts angebracht.In Fig. 1, an acceleration sensor 1 in conjunction with an evaluation unit 2 and a memory unit 3 is illustrated. A clock 4 , a battery 5 and a display 6 are also provided. In addition to the display 6 , controls 7 for actuating the measuring device are also attached.
Mit Hilfe des Sensors 1 und der Uhr 4 wird die Beschleunigung als Funktion der Zeit erfaßt und in der Speichereinheit 3 abgelegt. Die Auswerteeinheit 2 ist in der Lage, die Beschleunigung über die Zeit zu integrieren und auf diese Weise die Geschwindigkeit bzw. den zurückgelegten Weg als Funktion der Zeit zu ermitteln und im Speicher 3 abzuspeichern. Die abgespeicherten Daten können im Anschluß daran dazu verwendet werden, andere Daten, wie beispielsweise die Spitzengeschwindigkeit oder die Durchschnittsgeschwindigkeit, zu errechnen.With the help of the sensor 1 and the clock 4 , the acceleration is recorded as a function of time and stored in the memory unit 3 . The evaluation unit 2 is able to integrate the acceleration over time and in this way to determine the speed or the distance traveled as a function of time and to store it in the memory 3 . The stored data can then be used to calculate other data, such as peak speed or average speed.
In diesem ersten Ausführungsbeispiel werden die gewünschten Daten über eine Anzeige 6 ausgegeben, die sich zusammen mit den anderen Komponenten des Meßgeräts in einem kompletten Kompaktgerät befindet, das beispielsweise auf einem Ski montiert ist. Die verschiedenen Funktionen des Meßgeräts werden über die Bedienungselemente 7 eingestellt. In this first exemplary embodiment, the desired data are output on a display 6 which, together with the other components of the measuring device, is located in a complete compact device which is mounted, for example, on a ski. The various functions of the measuring device are set via the operating elements 7 .
In Fig. 2 ist zusätzlich ein Sender 8 und ein Empfänger 9 dargestellt, der mit einem Anzeigegerät 10 in Verbindung steht. Das Anzeigegerät weist außer der Anzeige 11 noch Bedienungselemente 12 auf. FIG. 2 also shows a transmitter 8 and a receiver 9 which is connected to a display device 10 . In addition to the display 11 , the display device also has operating elements 12 .
In diesem zweiten Ausführungsbeispiel werden die über die Bedienungselemente 12 aufgerufenen Informationen dem Anzeigegerät 10 über den Sender 8 und den Empfänger 9 übermittelt und an der Anzeige 11 ausgegeben. Eine drahtlose Datenübermittlung ist in der Zeichnung durch die gestrichelte Linie angedeutet.In this second exemplary embodiment, the information called up via the operating elements 12 is transmitted to the display device 10 via the transmitter 8 and the receiver 9 and output on the display 11 . Wireless data transmission is indicated in the drawing by the dashed line.
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE4222373A DE4222373A1 (en) | 1992-07-08 | 1992-07-08 | Distance and speed meter for sportsmen - derives speed and distance by integration of measured acceleration using sensor without external source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4222373A DE4222373A1 (en) | 1992-07-08 | 1992-07-08 | Distance and speed meter for sportsmen - derives speed and distance by integration of measured acceleration using sensor without external source |
Publications (1)
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DE4222373A1 true DE4222373A1 (en) | 1994-01-13 |
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Family Applications (1)
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DE4222373A Withdrawn DE4222373A1 (en) | 1992-07-08 | 1992-07-08 | Distance and speed meter for sportsmen - derives speed and distance by integration of measured acceleration using sensor without external source |
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Cited By (17)
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DE19641196A1 (en) * | 1996-09-24 | 1998-04-02 | Andreas Dr Fischer | Detection method for metal object e.g. bomb in ground |
EP0866949A1 (en) * | 1995-12-12 | 1998-09-30 | Lawrence J. Hutchings | System and method for measuring movement of objects |
US5955667A (en) * | 1996-10-11 | 1999-09-21 | Governors Of The University Of Alberta | Motion analysis system |
US6301964B1 (en) | 1997-10-14 | 2001-10-16 | Dyhastream Innovations Inc. | Motion analysis system |
US6305221B1 (en) | 1995-12-12 | 2001-10-23 | Aeceleron Technologies, Llc | Rotational sensor system |
EP1172276A1 (en) * | 2000-07-15 | 2002-01-16 | Robert Bosch Gmbh | Position dependent information presentation device in a railway vehicle |
WO2003089940A1 (en) * | 2001-04-21 | 2003-10-30 | Peter James Kimber | Velocity display device |
WO2004018971A1 (en) * | 2002-08-22 | 2004-03-04 | Milton Medicinteknik Kb | An instrument for measuring the traveled distance |
EP1406066A2 (en) * | 2002-09-16 | 2004-04-07 | Tobias Kramer | Distance and velocity measuring apparatus for skis and snowboards |
WO2004059240A2 (en) * | 2002-12-30 | 2004-07-15 | Tobias Kramer | Distance and speed measuring device for skis and snowboards |
EP1688746A3 (en) * | 2005-02-08 | 2006-08-23 | S.I.T. S.r.l. | Apparatus for monitoring human body's movements in sport or medical domain, and its use |
US7467060B2 (en) | 2006-03-03 | 2008-12-16 | Garmin Ltd. | Method and apparatus for estimating a motion parameter |
US8055469B2 (en) | 2006-03-03 | 2011-11-08 | Garmin Switzerland Gmbh | Method and apparatus for determining the attachment position of a motion sensing apparatus |
DE102011121259B3 (en) * | 2011-12-15 | 2013-05-16 | Fabian Walke | Method and device for mobile training data acquisition and analysis of strength training |
US9138174B2 (en) | 2008-05-12 | 2015-09-22 | Koninklijke Philips N.V. | Displacement measurement in a fall detection system |
WO2016125151A1 (en) * | 2015-02-02 | 2016-08-11 | My Size Israel 2014 Ltd. | A system for and a method of measuring a path length using a handheld electronic device |
RU2722057C2 (en) * | 2015-08-24 | 2020-05-26 | Май Сайз Израэл 2014 Лтд. | Measurement system and method using a pocket electronic device |
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Cited By (28)
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US6301964B1 (en) | 1997-10-14 | 2001-10-16 | Dyhastream Innovations Inc. | Motion analysis system |
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EP1688746A3 (en) * | 2005-02-08 | 2006-08-23 | S.I.T. S.r.l. | Apparatus for monitoring human body's movements in sport or medical domain, and its use |
US7467060B2 (en) | 2006-03-03 | 2008-12-16 | Garmin Ltd. | Method and apparatus for estimating a motion parameter |
US8036850B2 (en) | 2006-03-03 | 2011-10-11 | Garmin Switzerland Gmbh | Method and apparatus for estimating a motion parameter |
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US9138174B2 (en) | 2008-05-12 | 2015-09-22 | Koninklijke Philips N.V. | Displacement measurement in a fall detection system |
WO2013087902A1 (en) | 2011-12-15 | 2013-06-20 | Fabian Walke | Method and device for mobile training data acquisition and analysis of strength training |
US9125620B2 (en) | 2011-12-15 | 2015-09-08 | Fablan Walke | Method and device for mobile training data acquisition and analysis of strength training |
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US9750454B2 (en) | 2011-12-15 | 2017-09-05 | Fabian Walke | Method and device for mobile training data acquisition and analysis of strength training |
WO2016125151A1 (en) * | 2015-02-02 | 2016-08-11 | My Size Israel 2014 Ltd. | A system for and a method of measuring a path length using a handheld electronic device |
US10788304B2 (en) | 2015-02-02 | 2020-09-29 | My Size Israel 2014 Ltd. | System for and a method of measuring a path length using a handheld electronic device |
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