FR3027680A1 - DIDACTIC TIME MEASURING APPARATUS FOR ACCELERATING A ROTATION BODY CHARACTERIZED BY INFRARED SENSOR TECHNOLOGY CONNECTED TO AN ELECTRONIC CARD PROVIDING A CHRONOMETER - Google Patents
DIDACTIC TIME MEASURING APPARATUS FOR ACCELERATING A ROTATION BODY CHARACTERIZED BY INFRARED SENSOR TECHNOLOGY CONNECTED TO AN ELECTRONIC CARD PROVIDING A CHRONOMETER Download PDFInfo
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- FR3027680A1 FR3027680A1 FR1402405A FR1402405A FR3027680A1 FR 3027680 A1 FR3027680 A1 FR 3027680A1 FR 1402405 A FR1402405 A FR 1402405A FR 1402405 A FR1402405 A FR 1402405A FR 3027680 A1 FR3027680 A1 FR 3027680A1
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- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
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Abstract
Appareil didactique de mesure du temps sur l'accélération d'un corps en rotation agissant sous l'influence de quatre paramètres que sont : la force appliquée, la masse d'inertie, la distance de masse d'inertie, et le décalage de la force appliquée, et reposant sur un système mécanique conventionnel composé d'un axe vertical appelé à tourner sur lui-même doté d'au moins une poulie et d'un entrainement mécanique par corde, d'une barre perpendiculaire à l'axe vertical appelée à supporter une masselotte réglable en tout endroit de la barre aux fins d'offrir un réglage de la distance entre la masse et l'axe vertical, caractérisée par une technologie de capteur infrarouge relié à une carte électronique faisant office de chronomètre aux fins de transformer les données visuelles en données numériques, et un programme approprié pour récupérer sur ordinateur les valeurs numériques et les analyser.Didactic apparatus for measuring the time on the acceleration of a rotating body acting under the influence of four parameters such as: the applied force, the mass of inertia, the mass of inertia distance, and the offset of the applied force, and based on a conventional mechanical system consisting of a vertical axis rotated on itself with at least one pulley and a mechanical training rope, a bar perpendicular to the vertical axis called to support an adjustable weight anywhere on the bar for the purpose of providing a distance adjustment between the mass and the vertical axis, characterized by an infrared sensor technology connected to an electronic card acting as a chronometer for the purpose of transforming visual data in digital data; and an appropriate program for retrieving numerical values on a computer and analyzing them.
Description
Description de l'invention La présente invention concerne un appareil didactique de mesure du temps sur l'accélération d'un corps en rotation caractérisée par une technologie de capteur infrarouge reliée à une carte électronique faisant office de chronomètre aux fins de transformer les données visuelles en données numériques et un programme approprié pour récupérer sur ordinateur les valeurs numériques et pouvoir les analyser. Etat des sachant : Les appareils didactiques de mesure de temps sur l'accélération d'un corps en rotation reposent sur un système mécanique composé de : - un axe vertical appelé à tourner sur lui-même, doté d'au moins une poulie et d'un entrainement mécanique par corde, - une barre perpendiculaire à l'axe vertical appelée à supporter une masselotte réglable en tout endroit de la barre aux fins d'offrir un réglage de la distance entre la masse et l'axe vertical. Le principe de ce mécanisme est de pouvoir mesurer le temps de passage de la masse en rotation sur un tour en tenant compte des lois d'accélération et de décélération sous l'influence de quatre paramètres que sont : la force appliquée, la masse d'inertie, la distance de masse d'inertie, et le décalage de la force appliquée . La mesure du temps sur l'accélération d'un corps en rotation se réalise en faisant appel à deux solutions technologiques : soit l'appareil ne fait appel à aucun autre composant, auquel cas la mesure s'effectue à l'ceil nu sans qu'il soit possible de relever des données exactes, - soit encore l'appareil dispose d'une caméra embarquée et un logiciel d'acquisition et de traitement. Cette technologie est handicapée en trois points, en ce qu'elle : o renvoie à des systèmes de représentation vectorielle plus abstraits, handicapant la compréhension par l'élève, en ce qu'il n'y a aucune lecture des temps de passage, o ne permet pas de faire varier le poids des masselottes, ce qui réduit d'autant les schémas de représentation de la vitesse, o repose sur des choix technologiques couteux. Présentation de l'invention La présente invention repose sur une technologie mécanique semblable aux appareils de mesure de corps en rotation tel qu'identifié dans l'état des sachant.Description of the Invention The present invention relates to a didactic apparatus for measuring the time on the acceleration of a rotating body characterized by an infrared sensor technology connected to an electronic card acting as a chronometer for the purpose of transforming the visual data into digital data and an appropriate program to retrieve numerical values from the computer and analyze them. State of knowledge: Teaching devices for measuring time on the acceleration of a rotating body are based on a mechanical system composed of: - a vertical axis called to turn on itself, provided with at least one pulley and a mechanical training by rope, a bar perpendicular to the vertical axis called to support an adjustable weight anywhere in the bar to provide an adjustment of the distance between the mass and the vertical axis. The principle of this mechanism is to be able to measure the transit time of the mass in rotation on a lathe taking into account the laws of acceleration and deceleration under the influence of four parameters that are: the applied force, the mass of inertia, the mass distance of inertia, and the offset of the applied force. The measurement of the acceleration time of a rotating body is achieved by using two technological solutions: either the device does not use any other component, in which case the measurement is carried out with the naked eye without it is possible to record exact data, - or still the camera has an onboard camera and software acquisition and processing. This technology is handicapped in three points, in that it: o refers to more abstract systems of vector representation, handicapping the understanding by the student, in that there is no reading of the passage times, o does not allow to vary the weight of the weights, which reduces the representation of the speed of the representation, o is based on expensive technological choices. PRESENTATION OF THE INVENTION The present invention is based on mechanical technology similar to rotating body measuring apparatus as identified in the state of knowledge.
L'appareil se distingue des autres appareils en ce qu'il est doté : d'un capteur infrarouge qui détecte chaque passage de la barre perpendiculaire, - d'une carte électronique permettant de transformer le signal analogique fourni par le capteur en une suite de valeurs numériques, - un programme approprié en vue de récupérer sur ordinateur les valeurs numériques fournies par la carte électronique, et de pouvoir les analyser. Le fonctionnement de l'invention est le suivant : - l'utilisateur fait le choix des valeurs des quatre paramètres qu'il souhaite étudier : o la force appliquée : en choisissant le poids des masses accrochées au bout de la corde qui va actionner la poulie, o la masse d'inertie : en choisissant le poids des masselottes sur la barre perpendiculaire à l'axe vertical o la distance de masse d'inertie : en réglant la position de ou des masselottes sur la barre perpendiculaire o et le décalage de la force appliquée : en enroulant la corde autour du diamètre de la poulie choisi. L'utilisateur lâche la masse pour mettre le mécanisme en rotation, A chaque demi-tour effectué, la barre perpendiculaire vient couper le faisceau du capteur infrarouge, ce qui rompt le courant du capteur, - la carte électronique traduit cette coupure comme un départ de cycle, - à la coupure suivante (soit un demi-tour de barre perpendiculaire effectué), la carte électronique transmet au logiciel une valeur de temps entre les deux coupures, et relance un nouveau cycle, Le programme peut agir selon deux modes, dits enregistrement simple ou mode complet : o En enregistrement simple : - le programme recevant les données numériques de la carte (T =temps en millième de seconde), trace un graphique retraçant les temps de passage par demi-tour, - le même programme va transformer le temps de passage en vitesse de passage (w en tour par seconde), - ensuite il va tracer le graphique de représentation de la vitesse selon le temps de passage, - enfin il transforme la vitesse en valeur d'accélération sur chaque demi-tour. o En mode complet : - Le programme choisit pour l'utilisateur les valeurs de : force appliquée, masse d'inertie, distance de masse d'inertie, et décalage de la force appliquée, - Il agit en mode d'enregistrement simple comme indiqué ci-dessus, - Il propose à l'utilisateur de faire varier un des quatre paramètres avec deux autres valeurs (soit trois valeurs au total), - L'utilisateur relance l'appareil pour chaque valeur, - Le programme trace le graphique d'accélération lié au paramètre, permettant ainsi d'obtenir un graphisme regroupant les trois valeurs d'accélération obtenues pour chaque réglage du paramètre.The device differs from other devices in that it is equipped with: an infrared sensor which detects each passage of the perpendicular bar, - an electronic card making it possible to transform the analog signal supplied by the sensor into a series of numerical values, - an appropriate program to retrieve the numerical values provided by the electronic card on a computer, and to be able to analyze them. The operation of the invention is as follows: the user selects the values of the four parameters he wishes to study: the applied force: by choosing the weight of the masses hung at the end of the rope which will actuate the pulley , where the mass of inertia: by choosing the weight of the flyweights on the bar perpendicular to the vertical axis o the distance of mass of inertia: by adjusting the position of or of the weights on the perpendicular bar o and the offset of the applied force: by wrapping the rope around the diameter of the selected pulley. The user releases the mass to turn the mechanism, With each half-turn made, the perpendicular bar cuts off the beam of the infrared sensor, which breaks the current of the sensor, - the electronic card translates this break as a departure from cycle, - at the next cut (ie a half-turn of perpendicular bar performed), the electronic card transmits to the software a value of time between the two cuts, and starts a new cycle, The program can act in two modes, called recording simple or complete mode: o In simple recording: - the program receiving the digital data of the card (T = time in thousandths of a second), draws a graph showing the passage times by half-turn, - the same program will transform the passage time in passing speed (w in revolutions per second), - then it will draw the graph of representation of the speed according to the passage time, - finally it transforms the speed in value acceleration on each half-turn. o In complete mode: - The program chooses for the user the values of: applied force, mass of inertia, distance of mass of inertia, and shift of the force applied, - It acts in simple recording mode as indicated above, - It offers the user to vary one of the four parameters with two other values (three values in total), - The user restarts the device for each value, - The program traces the graph of acceleration related to the parameter, thus making it possible to obtain a graphic grouping together the three acceleration values obtained for each setting of the parameter.
Claims (8)
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FR1402405A FR3027680B1 (en) | 2014-10-23 | 2014-10-23 | DIDACTIC TIME MEASURING APPARATUS FOR ACCELERATING A ROTATION BODY CHARACTERIZED BY INFRARED SENSOR TECHNOLOGY CONNECTED TO AN ELECTRONIC CARD PROVIDING A CHRONOMETER |
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FR1402405A FR3027680B1 (en) | 2014-10-23 | 2014-10-23 | DIDACTIC TIME MEASURING APPARATUS FOR ACCELERATING A ROTATION BODY CHARACTERIZED BY INFRARED SENSOR TECHNOLOGY CONNECTED TO AN ELECTRONIC CARD PROVIDING A CHRONOMETER |
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FR3027680A1 true FR3027680A1 (en) | 2016-04-29 |
FR3027680B1 FR3027680B1 (en) | 2017-12-29 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3110274A1 (en) * | 2020-05-13 | 2021-11-19 | Promic | complete mechanical device of forced oscillations and resonance according to the technological principles of augmented reality. |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2298148A1 (en) * | 1975-01-15 | 1976-08-13 | Anvar | Rotation dynamics study device - has a plate with an angle piece and a shaft perpendicular to the plate |
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2014
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Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2298148A1 (en) * | 1975-01-15 | 1976-08-13 | Anvar | Rotation dynamics study device - has a plate with an angle piece and a shaft perpendicular to the plate |
Non-Patent Citations (2)
Title |
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3B SCIENTIFIC: "Mouvements de rotation à accélération uniforme - UE104010", 1 January 2008 (2008-01-01), pages 1 - 4, XP055212865, Retrieved from the Internet <URL:https://www.3bscientific.com/medialibrary/experiments/fr/UE104010_F.pdf> [retrieved on 20150911] * |
MACHELE CABLE: "Adjustable angular momentum", 31 December 2004 (2004-12-31), XP054976061, Retrieved from the Internet <URL:http://physicslearning2.colorado.edu/pira/static/pira200/mechanics/mechanicsvideos/1q2010.wmv> [retrieved on 20150911] * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3110274A1 (en) * | 2020-05-13 | 2021-11-19 | Promic | complete mechanical device of forced oscillations and resonance according to the technological principles of augmented reality. |
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