{"id":20313,"date":"2025-12-02T15:58:32","date_gmt":"2025-12-02T14:58:32","guid":{"rendered":"https:\/\/micromega-dynamics.com\/mems-vs-piezoelectric-accelerometers-which-one-to-choose\/"},"modified":"2025-12-02T15:58:36","modified_gmt":"2025-12-02T14:58:36","slug":"mems-vs-piezoelectric-accelerometers-which-one-to-choose","status":"publish","type":"post","link":"https:\/\/micromega-dynamics.com\/fr\/mems-vs-piezoelectric-accelerometers-which-one-to-choose\/","title":{"rendered":"Acc\u00e9l\u00e9rom\u00e8tres MEMS ou pi\u00e9zo\u00e9lectriques : Lequel choisir ?"},"content":{"rendered":"

[et_pb_section fb_built=\u00a0\u00bb1″ admin_label=\u00a0\u00bbsection\u00a0\u00bb _builder_version=\u00a0\u00bb4.16″ global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_row admin_label=\u00a0\u00bbrang\u00e9e\u00a0\u00bb _builder_version=\u00a0\u00bb4.16″ background_size=\u00a0\u00bbinitial\u00a0\u00bb background_position=\u00a0\u00bbtop_left\u00a0\u00bb background_repeat=\u00a0\u00bbrepeat\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][et_pb_column type=\u00a0\u00bb4_4″ _builder_version=\u00a0\u00bb4.16″ custom_padding=\u00a0\u00bb|||\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb custom_padding__hover=\u00a0\u00bb|||\u00a0\u00bb][et_pb_image src=\u00a0\u00bbhttps:\/\/micromega-dynamics.com\/files\/uploads\/2025\/10\/Sans-titre-2000-x-800-px-1600-x-900-px-1.jpg\u00a0\u00bb alt=\u00a0\u00bbAcc\u00e9l\u00e9rom\u00e8tre vs Piezotronic\u00a0\u00bb title_text=\u00a0\u00bbAcc\u00e9l\u00e9rom\u00e8tre vs Piezotronic\u00a0\u00bb admin_label=\u00a0\u00bbImage\u00a0\u00bb _builder_version=\u00a0\u00bb4.27.4″ _module_preset=\u00a0\u00bbdefault\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb][\/et_pb_image][et_pb_text admin_label=\u00a0\u00bbText\u00a0\u00bb _builder_version=\u00a0\u00bb4.27.4″ background_size=\u00a0\u00bbinitial\u00a0\u00bb background_position=\u00a0\u00bbtop_left\u00a0\u00bb background_repeat=\u00a0\u00bbrepeat\u00a0\u00bb global_colors_info=\u00a0\u00bb{}\u00a0\u00bb]<\/p>\n

Les acc\u00e9l\u00e9rom\u00e8tres sont au c\u0153ur de la surveillance des vibrations. Ils permettent aux ing\u00e9nieurs de d\u00e9tecter les oscillations anormales, d’analyser les performances des machines ou de surveiller la sant\u00e9 structurelle des b\u00e2timents sensibles. Mais tous les acc\u00e9l\u00e9rom\u00e8tres ne reposent pas sur le m\u00eame principe. Les deux technologies les plus courantes sont les acc\u00e9l\u00e9rom\u00e8tres MEMS et les acc\u00e9l\u00e9rom\u00e8tres pi\u00e9zo\u00e9lectriques<\/g>. Chacune pr\u00e9sente des avantages et des limites sp\u00e9cifiques, ce qui rend le choix tr\u00e8s d\u00e9pendant de l’application. <\/p>\n

Acc\u00e9l\u00e9rom\u00e8tres MEMS<\/h2>\n
Les acc\u00e9l\u00e9rom\u00e8tres <\/a>MEMS (Micro-Electro-Mechanical Systems)<\/strong> utilisent de minuscules structures m\u00e9caniques int\u00e9gr\u00e9es dans une puce, souvent avec un principe capacitif. Lorsque la structure se d\u00e9place sous l’effet d’une acc\u00e9l\u00e9ration, la capacit\u00e9 change et cette variation est convertie en un signal \u00e9lectrique. <\/div>\n

Les capteurs MEMS sont compacts, abordables et \u00e9conomes en \u00e9nergie. Ils sont bien adapt\u00e9s aux appareils portables, \u00e0 l’int\u00e9gration IoT et aux campagnes de surveillance \u00e0 long terme<\/strong>. Leur sortie num\u00e9rique les rend faciles \u00e0 utiliser sans conditionnement lourd du signal. Ils sont capables de mesurer les vibrations \u00e0 partir du courant continu et sont donc bien adapt\u00e9s aux vibrations \u00e0 basse fr\u00e9quence. <\/p>\n

Chez Micromega Dynamics, le Recovib Tiny en<\/a> est un bon exemple. Il s’agit d’un appareil robuste et autonome bas\u00e9 sur la technologie MEMS, con\u00e7u pour un d\u00e9ploiement rapide sur le terrain. Le Feel USB<\/a> est \u00e9galement bas\u00e9 sur la technologie MEMS et fournit des donn\u00e9es \u00e0 haute r\u00e9solution directement sur un PC. <\/p>\n

Id\u00e9al pour<\/strong>: Surveillance des structures, surveillance portable des vibrations, maintenance industrielle, surveillance de longue dur\u00e9e, projets sensibles aux co\u00fbts.<\/p>\n

Acc\u00e9l\u00e9rom\u00e8tres pi\u00e9zo\u00e9lectriques<\/h2>\n

Les acc\u00e9l\u00e9rom\u00e8tres pi\u00e9zo\u00e9lectriques<\/strong> reposent sur un cristal qui g\u00e9n\u00e8re une charge \u00e9lectrique lorsqu’il est soumis \u00e0 une acc\u00e9l\u00e9ration. Ce principe leur conf\u00e8re une large gamme de fr\u00e9quences<\/g> et une tr\u00e8s grande sensibilit\u00e9<\/g>. Ils sont consid\u00e9r\u00e9s comme la r\u00e9f\u00e9rence en mati\u00e8re de mesures pr\u00e9cises des vibrations. <\/p>\n

Leur principale limite est qu’ils ne peuvent pas mesurer les acc\u00e9l\u00e9rations statiques ou \u00e0 tr\u00e8s basse fr\u00e9quence<\/strong>, car la charge g\u00e9n\u00e9r\u00e9e a tendance \u00e0 fuir avec le temps. C’est pourquoi ils ne conviennent pas \u00e0 la surveillance des d\u00e9rives lentes ou des charges statiques. <\/p>\n

Id\u00e9al pour<\/strong>: les tests en laboratoire, les applications a\u00e9rospatiales, les machines tournantes \u00e0 grande vitesse et les cas o\u00f9 la largeur de bande de fr\u00e9quence et la sensibilit\u00e9 sont critiques.<\/p>\n

Comment choisir le bon acc\u00e9l\u00e9rom\u00e8tre ?<\/h2>\n

Le choix d\u00e9pend de la gamme de fr\u00e9quences, de l’environnement et des objectifs.<\/strong><\/p>\n

    \n
  • \n

    Si vous avez besoin d’une solution portable, rentable, de mesure \u00e0 basse fr\u00e9quence et connect\u00e9e<\/strong> pour les mesures sur le terrain \u2192 choisissez les MEMS<\/strong>.<\/p>\n<\/li>\n

  • \n

    Si votre application exige une pr\u00e9cision \u00e0 haute fr\u00e9quence (>20kHz)<\/strong> \u2192 optez pour le pi\u00e9zo\u00e9lectrique<\/strong>.<\/p>\n<\/li>\n<\/ul>\n

    Dans la pratique, de nombreuses organisations combinent plusieurs technologies : MEMS pour la surveillance de routine et \u00e0 long terme, et pi\u00e9zo\u00e9lectrique pour des \u00e9tudes plus sp\u00e9cifiques.<\/p>\n

    Au-del\u00e0 du capteur : la valeur des donn\u00e9es<\/h2>\n

    Quel que soit l’acc\u00e9l\u00e9rom\u00e8tre choisi, la valeur vient de la fa\u00e7on dont les donn\u00e9es sont trait\u00e9es et partag\u00e9es. Des logiciels comme Recovib Suite<\/g> pour la surveillance sur site permettent aux ing\u00e9nieurs d’analyser les donn\u00e9es pendant ou apr\u00e8s une campagne de mesure. Avec Recovib Cloud<\/g> pour la surveillance \u00e0 distance, ils peuvent \u00e9galement visualiser les signaux, d\u00e9finir des alarmes et g\u00e9n\u00e9rer des rapports en temps r\u00e9el. Les donn\u00e9es vibratoires brutes sont ainsi transform\u00e9es en informations exploitables qui permettent de pr\u00e9venir les d\u00e9faillances, de prot\u00e9ger les structures et d’optimiser la maintenance. <\/p>\n

    [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

    Les acc\u00e9l\u00e9rom\u00e8tres sont au c\u0153ur de la surveillance des vibrations. Ils permettent aux ing\u00e9nieurs de d\u00e9tecter les oscillations anormales, d’analyser les performances des machines ou de surveiller la sant\u00e9 structurelle des b\u00e2timents sensibles. Mais tous les acc\u00e9l\u00e9rom\u00e8tres ne reposent pas sur le m\u00eame principe. Les deux technologies les plus courantes sont les acc\u00e9l\u00e9rom\u00e8tres MEMS et […]<\/p>\n","protected":false},"author":13,"featured_media":19711,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-20313","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee"],"yoast_head":"\nAcc\u00e9l\u00e9rom\u00e8tres MEMS ou pi\u00e9zo\u00e9lectriques : Lequel choisir ?<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez les diff\u00e9rences entre les acc\u00e9l\u00e9rom\u00e8tres MEMS et pi\u00e9zo\u00e9lectriques. 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