Un projet en béton

Voilà une nouvelle qui ne vous laissera pas de marbre : le CRIS participe cet été à un nouveau projet de "Béton interactif" dans le cadre d'un concours organisé par l'association Horizome.

L'appel à projet d'Horizome

Logo

Horizome est un collectif ouvert qui agit dans le quartier de Hautepierre à Strasbourg. Son but, organiser des actions artistiques et culturelles afin de permettre à la population de mieux s'intégrer et de s'identifier au quartier. Une des particularités de ces actions est leur transdisciplinarité. Les arts, les sciences sociales et l'urbanisme sont combinées, et même l'ingénierie électronique ! Lors d'un appel à projet d'Horizome des architectes sortis de l'INSA Strasbourg ont proposé de réaliser des dalles de béton interactif, qui pourraient émettre un son lorsqu'un passant les toucherait. Après avoir été sélectionnés ils nous ont demandé notre aide pour concevoir l'électronique des dalles. C'est ainsi que l'aventure a commencé !

Le cahier des charges

Les dalles sont constituées de béton et seront des pavés de dimensions maximales 20cm x 15cm x 7cm. Elles seront creuses afin d'accueillir l'électronique embarquée. La carte électronique sera constituée d'un interface programmable de type PIC qui permettra d'assurer la détection des passants et la restitution d'un signal sonore pré enregistré. Ce bruitage sera stockée dans une mémoire morte EEPROM, et devra être entendu à travers les épaisseurs de béton. La génération du son se fera par un petit haut parleur, amplifié par un phénomène de caisse de résonance. Le tout doit fonctionner sur batterie et avoir une autonomie la plus longue possible. La batterie soit aussi être rechargeable sans démonter la dalle. La conception électronique doit être achevée pour fin août, début septembre.

Schéma d'une dalle intéractive
Schéma d'une dalle intéractive

Les premiers signes de vie

Avec toutes ces contraintes, il ne faut pas perdre de temps ! Si tôt les détails de la mission donnés, les premiers programmes de détection ont vu le jour. Ils sont maintenant près, et n'attendent plus que les programmes de génération de signal sonore qui verront le jour milieu de la semaine prochaine. En attendant, voici quelques photos du prototype :

Prototype sur platine d'essai
Prototype sur platine d'essai
Le voyant vert s'allume lorsque la main rencontre le béton
Le voyant vert s'allume lorsque la main rencontre le béton

Remerciements

Merci aux architectes Pierrick Albert et Augustin Roy-Verger pour nous avoir proposé ce projet aussi original qu'intéressant.


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