{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T06:43:24Z","timestamp":1772693004846,"version":"3.50.1"},"reference-count":24,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T00:00:00Z","timestamp":1772236800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Recovery and Resilience Plan and European Funds Next Generation EU","award":["C644867037-00000013"],"award-info":[{"award-number":["C644867037-00000013"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Machines"],"abstract":"<jats:p>This paper presents initial developments towards a high-frequency condition monitoring framework designed for Autonomous Mobile Robots (AMRs) in Smart Factory environments. The proposed approach focuses on data acquisition and edge-level processing at the ultrasound range specifically (&gt;20 kHz), using Micro-Electro-Mechanical System (MEMS) sensors. The system integrates real-time data acquisition, embedded fixed-point frequency-domain processing via a 1024-point FFT, and the integration of Industrial Internet-of-Things (IIoT) infrastructure based on the TIG (Telegraf, InfluxDB, and Grafana) stack, for data aggregation and remote visualization. To ensure timing precision at a sampling rate of 160 kHz, a software-based calibration routine is implemented to compensate for microcontroller overhead. Furthermore, the architecture\u2019s alignment with IEEE 1451 principles is discussed to support interoperable and scalable sensor integration. Experimental results validate the reliable acquisition and processing of ultrasonic signals up to 80 kHz using controlled acoustic sources. This work provides a foundational infrastructure for condition-based monitoring, enabling future development of automated anomaly detection for mechanical components, such as bearings, which exhibit early-stage fault signatures in the ultrasonic spectrum.<\/jats:p>","DOI":"10.3390\/machines14030270","type":"journal-article","created":{"date-parts":[[2026,3,2]],"date-time":"2026-03-02T14:06:56Z","timestamp":1772460416000},"page":"270","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["High Frequency Ultrasonic Condition Monitoring Framework Based on Edge-Computing and Telemetry Stack Approach"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9945-9916","authenticated-orcid":false,"given":"Geoffrey","family":"Spencer","sequence":"first","affiliation":[{"name":"Research Center for Systems and Technologies (SYSTEC-DIGI2), ARISE & ECE Department, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"},{"name":"Polytechnic Institute of Castelo Branco, Av. Pedro \u00c1lvares Cabral No 12, 6000-084 Castelo Branco, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4835-5022","authenticated-orcid":false,"given":"Pedro M. B.","family":"Torres","sequence":"additional","affiliation":[{"name":"Research Center for Systems and Technologies (SYSTEC-DIGI2), ARISE & ECE Department, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"},{"name":"Polytechnic Institute of Castelo Branco, Av. Pedro \u00c1lvares Cabral No 12, 6000-084 Castelo Branco, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7840-0333","authenticated-orcid":false,"given":"V\u00edtor H.","family":"Pinto","sequence":"additional","affiliation":[{"name":"Research Center for Systems and Technologies (SYSTEC-DIGI2), ARISE & ECE Department, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7757-7308","authenticated-orcid":false,"given":"Gil","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Research Center for Systems and Technologies (SYSTEC-DIGI2), ARISE & ECE Department, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2026,2,28]]},"reference":[{"key":"ref_1","first-page":"70","article-title":"A Comprehensive Review of Maintenance Strategies: From Reactive to Proactive Approaches","volume":"26","author":"Gholipour","year":"2025","journal-title":"SSRN Electron. 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