{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T04:28:19Z","timestamp":1772252899131,"version":"3.50.1"},"reference-count":31,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2016,9,21]],"date-time":"2016-09-21T00:00:00Z","timestamp":1474416000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A portable laser photoacoustic sensor for methane (CH4) detection based on a field-programmable gate array (FPGA) is reported. A tunable distributed feedback (DFB) diode laser in the 1654 nm wavelength range is used as an excitation source. The photoacoustic signal processing was implemented by a FPGA device. A small resonant photoacoustic cell is designed. The minimum detection limit (1\u03c3) of 10 ppm for methane is demonstrated.<\/jats:p>","DOI":"10.3390\/s16091551","type":"journal-article","created":{"date-parts":[[2016,9,21]],"date-time":"2016-09-21T10:11:26Z","timestamp":1474452686000},"page":"1551","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["A Portable Laser Photoacoustic Methane Sensor Based on FPGA"],"prefix":"10.3390","volume":"16","author":[{"given":"Jianwei","family":"Wang","sequence":"first","affiliation":[{"name":"School of Information Engineering, Robot Technology Used for Special Environment Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China"}]},{"given":"Huili","family":"Wang","sequence":"additional","affiliation":[{"name":"Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion CAEP, Mianyang 621010, China"}]},{"given":"Xianyong","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Information Engineering, Robot Technology Used for Special Environment Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China"}]}],"member":"1968","published-online":{"date-parts":[[2016,9,21]]},"reference":[{"key":"ref_1","first-page":"1249","article-title":"Remote system of natural gas leakage based on multi-wavelength characteristics spectrum analysis","volume":"34","author":"Li","year":"2014","journal-title":"Spectrosc. 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