Flexible Capacitive Sensor Array: Advanced Readout Electronics for Real-Time Pressure Monitoring

Flexible Capacitive Sensor Array: Advanced Readout Electronics for Real-Time Pressure Monitoring | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Flexible Capacitive Sensor Array: Advanced Readout Electronics for Real-Time Pressure Monitoring Rayane Marsil, Bacem Zribi, Martin Picard, Antoine Leclercq, Florentin Brichart, and 9 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9157558/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 10 You are reading this latest preprint version Abstract Developing cutting-edged transducers of new sensing technologies critically depends not only on the physical elements themselves, but on a careful conceptualization of appropriate readout circuits capable of extracting meaningful information from raw signals. Particularly relevant to pattern-recognition related applications, the right design of a readout circuit must be tightly aligned with the physics governing the transduction mechanism in sensing array during operation, as well as with the structure of data and patterns to be recognized by the system in a practical application. In this work, we present the development of an haptic system capable of recognizing in real time temporal sequences of pressure patterns on a flexible and transparent capacitive sensor array. Fabricated using advanced microfabrication techniques, the sensor array combines mechanical flexibility, optical transparency, and high sensitivity, enabling reliable operation and seamless integration with dynamic biological surfaces. The complete system is capable of detecting subtle capacitance variations in the picofarad range, enabled by a custom acquisition platform integrating the AD7746, a high-resolution capacitance-to-digital converter (CDC). This integration allows for precise measurement, efficient on-board data processing, and real-time response. A systematic optimization study of the acquisition platform was carried out to ensure low noise, high stability, and real-time responsiveness. The system’s performance was then evaluated through dynamic character recognition tasks based on pressure input, employing a Principal Component Analysis (PCA)-based machine learning approach for classification. By the capability of the portable system to recognize temporal sequences of pressure patterns on a 16-pixel array in real time, the platform successfully serves as a strong proof of concept to build connected equipment such as artificial skins aiming at recognizing complex physical pattern for human-machine interfacing. Polymer capacitive sensors capacitance-to-digital converter principal component analysis letter recognition Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Reviews received at journal 17 May, 2026 Reviews received at journal 08 May, 2026 Reviewers agreed at journal 08 May, 2026 Reviewers agreed at journal 06 May, 2026 Reviewers agreed at journal 04 May, 2026 Reviewers agreed at journal 29 Apr, 2026 Reviewers invited by journal 29 Apr, 2026 Editor assigned by journal 31 Mar, 2026 Submission checks completed at journal 31 Mar, 2026 First submitted to journal 18 Mar, 2026 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9157558","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":635594764,"identity":"14d4a9d0-f4c6-4687-95a2-1af22ff21389","order_by":0,"name":"Rayane Marsil","email":"","orcid":"","institution":"Institut Catholique d'Arts et Métiers","correspondingAuthor":false,"prefix":"","firstName":"Rayane","middleName":"","lastName":"Marsil","suffix":""},{"id":635594768,"identity":"ded2ab8d-11ab-49bf-a9e3-90408e05725a","order_by":1,"name":"Bacem Zribi","email":"","orcid":"","institution":"Institute of Electronics, Microelectronics and 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