{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,18]],"date-time":"2026-06-18T19:35:17Z","timestamp":1781811317455,"version":"3.54.5"},"reference-count":43,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2024,4,9]],"date-time":"2024-04-09T00:00:00Z","timestamp":1712620800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012166","name":"National Key Research and Development Program of China","doi-asserted-by":"publisher","award":["2021YFB3900204"],"award-info":[{"award-number":["2021YFB3900204"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Many efforts have been taken in recent years to push atomic gravimeters toward practical applications. We demonstrate an atomic gravimeter named NIM-AGRb2 that is transportable and suitable for high-precision gravity measurements. Constraint-structured active vibration isolation (CS-AVI) is used to reduce the ground vibration noise. The constraint structure in CS-AVI ensures that the isolation platform only has vertical translation, with all other degrees of freedom (DoFs) being constrained. Therefore, the stability of active vibration isolation is enhanced. With the implementation of CS-AVI, the sensitivity of NIM-AGRb2 reached as low as 20.5 \u03bcGal\/Hz1\/2. The short-term sensitivity could be further reduced to 10.8 \u03bcGal\/Hz1\/2 in a seismologic observation station. Moreover, we evaluated the system noise of the gravimeter, and the results were consistent with our observations.<\/jats:p>","DOI":"10.3390\/s24082395","type":"journal-article","created":{"date-parts":[[2024,4,9]],"date-time":"2024-04-09T08:55:12Z","timestamp":1712652912000},"page":"2395","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["A Transportable Atomic Gravimeter with Constraint-Structured Active Vibration Isolation"],"prefix":"10.3390","volume":"24","author":[{"given":"Chuanjing","family":"Ruan","sequence":"first","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"},{"name":"School of Automation and Intelligence, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Zhuang","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"},{"name":"Key Laboratory of State Administration for Market Regulation (Time Frequency and Gravity Primary Standard), Beijing 100029, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiamin","family":"Yao","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"},{"name":"Key Laboratory of State Administration for Market Regulation (Time Frequency and Gravity Primary Standard), Beijing 100029, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yang","family":"Zhao","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"},{"name":"Key Laboratory of State Administration for Market Regulation (Time Frequency and Gravity Primary Standard), Beijing 100029, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zenghan","family":"Ma","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"},{"name":"College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cong","family":"Yi","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qin","family":"Tian","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"},{"name":"School of Automation and Intelligence, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuqing","family":"Wu","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"},{"name":"Key Laboratory of State Administration for Market Regulation (Time Frequency and Gravity Primary Standard), Beijing 100029, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fang","family":"Fang","sequence":"additional","affiliation":[{"name":"National Institute of Metrology, Beijing 100029, China"},{"name":"Key Laboratory of State Administration for Market Regulation (Time Frequency and Gravity Primary Standard), Beijing 100029, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yinghong","family":"Wen","sequence":"additional","affiliation":[{"name":"School of Automation and Intelligence, Beijing Jiaotong University, Beijing 100044, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"043610","DOI":"10.1103\/PhysRevA.88.043610","article-title":"Demonstration of an ultrahigh-sensitivity atom-interferometry absolute gravimeter","volume":"88","author":"Hu","year":"2013","journal-title":"Phys. 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