Electronic transducer for measuring flexion

G - Physics – 01 – B

Patent

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Details

G01B 7/00 (2006.01) G01B 7/16 (2006.01) G01B 7/30 (2006.01) G01D 5/20 (2006.01) G06F 3/044 (2006.01) G06F 3/046 (2006.01) H01G 5/01 (2006.01) H01G 5/18 (2006.01) H01F 21/04 (2006.01)

Patent

CA 2370148

An electronic flexion transducer (10) comprises a helical coil formed from two interposed electrical conductors (A) and (B) which are electrically isolated from each other either by an insulated coating on the conductors or by being embedded in a dielectric material (11) having a substantial elasticity. The coil is bonded along one side over its entire length to a flexible non-extensible support surface (13) whereby flexion of the support surface causes a change in the length of the coil between said one side, which retains its original length, and a side opposite to said one side, which either increases or decreases in length. This relative change in length between opposite sides causes angular separation between adjacent turns of the coil and since adjacent turns represent respective conductors (A) and (B) there is a change in capacitance between the respective conductors which can be used to provide an electrical signal to a computer to record and display the change. A puppeteer's glove incorporating a said transducer in each finger is also described.

L'invention concerne un transducteur (10) de flexion comprenant une bobine hélicoïdale formée de deux conducteurs électriques interposés, (A) et (B), qui sont électriquement isolés l'un de l'autre soit par un revêtement dont ils sont recouverts, soit par un matériau diélectrique (11) présentant une élasticité élevée, et dans lequel ils viennent se loger. La bobine est latéralement fixée sur toute sa longueur à une surface (13) de support non extensible et souple. Une flexion de la surface de support provoque une variation de la longueur de la bobine entre le côté fixé, qui conserve sa longueur originale, et le côté opposé, dont la longueur augmente ou diminue. Cette variation relative de longueur entre deux côtés opposés provoque une séparation angulaire entre les spires adjacentes de la bobine, et étant donné que les spires adjacentes représentent des conducteurs respectifs (A) et (B), on observe une variation de capacité entre les conducteurs respectifs, qui peuvent servir à conduire un signal électrique vers un ordinateur destiné à enregistrer et à afficher cette variation. L'invention concerne également un gant de marionnettiste pourvu d'un transducteur de ce type à chaque doigt.

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