A Single-Printed Two-Dimensional Optical Accelerometer Based on a Dual-Source Window-Light Configuration

Description

DOI 10.1109/JSEN.2026.3718257

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This article presents the design and characterization of a 2-D optical accelerometer fabricated through additive manufacturing (AM) (3-D printing). The device utilizes a unique “window-light” displacement sensing mechanism powered by dual-source near-infrared (NIR) modulation. Unlike traditional silicon-based micro-electro-mechanical system (MEMS), the proposed sensor offers high geometric flexibility, low capital cost, and immunity to electromagnetic interference (EMI). The structural frame consists of a monolithic, 3-D-printed compliant mechanism with an integrated proof mass, fabricated in a single printing process. Owing to the proposed structure, the 3-D-printed accelerometer can be fabricated economically while achieving a compact form factor. Experimental results demonstrate linear sensitivities of approximately 119 and 117 mV/g along the X - and Y -axes, respectively, and a natural frequency of 197 Hz. The cross-axis sensitivity (crosstalk) is estimated to be approximately 9.12%, confirming the effective mechanical decoupling of the suspension system. This work highlights the potential of 3-D-printed optical sensors for specialized industrial and vibration monitoring applications.

Institutions

• Babeș-Bolyai University

  Cluj County, Cluj-Napoca

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