<\/div>\n
Le principe de triangulation<\/h2>
Le capteur projette un faisceau laser collimat\u00e9 (en g\u00e9n\u00e9ral rouge ou bleu) sur une surface cible ; la lumi\u00e8re diffus\u00e9e par le point d’impact est capt\u00e9e par une lentille plac\u00e9e sous un certain angle et focalis\u00e9e sur un capteur CMOS lin\u00e9aire ou matriciel. La position du point sur la barrette d\u00e9pend de la distance de la cible, selon des relations g\u00e9om\u00e9triques connues. Le capteur CMOS est num\u00e9ris\u00e9 et un algorithme de centro\u00efde subpixellaire calcule la position exacte du point lumineux, produisant la mesure de distance. La r\u00e9solution effective est d’environ 1\/8000 de la course nominale sur les mod\u00e8les industriels courants. <\/p>
Caract\u00e9ristiques typiques<\/h2>
Les capteurs \u00e0 triangulation se caract\u00e9risent par une distance de travail nominale (10, 30, 50, 100, 200, 500 mm et au-del\u00e0), une plage de mesure (mid-range, typiquement \u00b15 %, \u00b110 % ou \u00b120 % de la distance nominale), une r\u00e9solution (0,1 \u03bcm – 10 \u03bcm selon le mod\u00e8le), une cadence d’acquisition (1-50 kHz) et une sortie analogique (4-20 mA, 0-10 V) et\/ou num\u00e9rique (RS-485, IO-Link, Ethernet\/IP, Profinet, EtherCAT). Les sources laser bleues (405 nm) conviennent mieux aux surfaces brillantes ou transparentes que les lasers rouges (650-660 nm). <\/p>
Applications industrielles<\/h2>
Les capteurs \u00e0 triangulation laser sont utilis\u00e9s pour le contr\u00f4le dimensionnel en ligne de production (\u00e9paisseur de t\u00f4les, profil\u00e9s, hauteurs de produit), pour la mesure du d\u00e9placement de composants m\u00e9caniques en mouvement (axes de machines), pour la v\u00e9rification du faux-rond d’organes rotatifs, pour le positionnement de robots et d’actionneurs, pour la mesure de niveau de liquides et de solides, pour la v\u00e9rification de la rectitude et de la plan\u00e9it\u00e9 de surfaces, et pour le contr\u00f4le de joints, d’opercules et des dimensions de produits extrud\u00e9s. Leur bande passante \u00e9lev\u00e9e permet l’int\u00e9gration dans des syst\u00e8mes de commande rapides. <\/p>
Consid\u00e9rations d’application<\/h2>
La surface de la cible influe fortement sur les performances : les surfaces diffusantes donnent le signal optimal, tandis que les surfaces brillantes ou sp\u00e9culaires exigent des dispositions particuli\u00e8res (capteurs pour applications sp\u00e9ciales, angles d’inclinaison, longueurs d’onde d\u00e9di\u00e9es). Les surfaces transparentes peuvent induire des erreurs par r\u00e9flexion interne. Les sources laser bleues conviennent mieux aux objets rouges ou rouge\u00e2tres, organiques ou incandescents. La temp\u00e9rature de la cible (\u00e0 chaud) peut alt\u00e9rer l’efficacit\u00e9 du capteur CMOS : des mod\u00e8les sp\u00e9cifiques sont disponibles pour les applications sur pi\u00e8ces port\u00e9es au rouge. <\/p>
Normes et \u00e9talonnage<\/h2>
Les capteurs laser industriels suivent la classification de s\u00e9curit\u00e9 de la CEI 60825-1. Les sp\u00e9cifications m\u00e9trologiques de performance sont d\u00e9crites selon la VDI\/VDE 2634 pour la mesure optique et selon les sp\u00e9cifications techniques du constructeur (lin\u00e9arit\u00e9, r\u00e9p\u00e9tabilit\u00e9, d\u00e9rive thermique). L’\u00e9talonnage s’effectue avec des r\u00e9f\u00e9rences dimensionnelles certifi\u00e9es ISO 17025. <\/p>
L’int\u00e9gration de plusieurs capteurs \u00e0 triangulation laser dispos\u00e9s autour d’un produit permet la mesure simultan\u00e9e du diam\u00e8tre, de l’ovalisation et de l’excentricit\u00e9 dans des productions continues comme le tr\u00e9filage, l’extrusion et le laminage. Leur structure modulaire et leur cadence d’acquisition \u00e9lev\u00e9e autorisent des logiques de commande en r\u00e9troaction qui maintiennent les param\u00e8tres de production constamment dans les tol\u00e9rances, r\u00e9duisant les rebuts et am\u00e9liorant la stabilit\u00e9 du proc\u00e9d\u00e9. <\/p>","protected":false},"excerpt":{"rendered":"
Capteurs \u00e0 triangulation laser pour la mesure de distance, de d\u00e9placement et de position en production.<\/p>\n","protected":false},"author":157040980,"featured_media":0,"parent":19317,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_wpcom_ai_launchpad_about_page":false,"_wpcom_ai_launchpad_gallery_page":false,"_wpcom_ai_launchpad_contact_page":false,"_wpcom_ai_launchpad_events_page":false,"_wpcom_ai_launchpad_video_page":false,"_wpcom_ai_launchpad_portfolio_piece":false,"footnotes":""},"class_list":["post-23360","page","type-page","status-publish","hentry"],"yoast_head":"\n
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La technologie LASER repr\u00e9sente aujourd'hui un standard \u00e9prouv\u00e9 pour la\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"icona misura di distanza common masterimage","src":"https:\/\/i0.wp.com\/roder.it\/wp-content\/uploads\/2022\/10\/icona_distanza_500x500-1.png?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":20705,"url":"https:\/\/roder.it\/fr\/controles\/dimension-et-geometrie\/mesures-de-distance-sans-contact\/","url_meta":{"origin":23360,"position":3},"title":"Mesures de distance sans contact","author":"GSM","date":"7 juillet 2026","format":false,"excerpt":"La mesure de distance sans contact avec des t\u00e9l\u00e9m\u00e8tres LASER permet de relever distances, positions et niveaux de fa\u00e7on rapide et pr\u00e9cise, m\u00eame sur des objets en mouvement, chauds ou difficilement accessibles, sans toucher la cible. Sans contact : aucun \u00e9l\u00e9ment ne touche la cible Faisceau LASER : mesure localis\u00e9e\u2026","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":23400,"url":"https:\/\/roder.it\/fr\/controles\/distance-position-et-deplacement-sans-contact\/detecteurs-de-trous-et-de-discontinuites-punch-hole\/","url_meta":{"origin":23360,"position":4},"title":"D\u00e9tecteurs de trous et de discontinuit\u00e9s (punch hole)","author":"GSM","date":"13 mai 2026","format":false,"excerpt":"Capteurs de d\u00e9tection de trous, de fentes et de discontinuit\u00e9s sur bandes d\u00e9filant \u00e0 grande vitesse.","rel":"","context":"Article similaire","block_context":{"text":"Article similaire","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":18267,"url":"https:\/\/roder.it\/fr\/produits\/telemetres-laser-industriels\/","url_meta":{"origin":23360,"position":5},"title":"T\u00e9l\u00e9m\u00e8tres LASER industriels","author":"GSM","date":"2 janvier 2026","format":false,"excerpt":"RODER \u00b7 T\u00e9l\u00e9m\u00e8tres LASER T\u00e9l\u00e9m\u00e8tres LASER industriels Les t\u00e9l\u00e9m\u00e8tres LASER industriels distribu\u00e9s par RODER mesurent distance, position, niveau et d\u00e9placement sans contact, de quelques centim\u00e8tres jusqu\u2019\u00e0 3000 m. 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