{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T06:40:40Z","timestamp":1776753640012,"version":"3.51.2"},"reference-count":16,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T00:00:00Z","timestamp":1618444800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"The Important Fund for Basic research of Local Colleges in Yunnan Province","award":["(No.2017FH001-008)"],"award-info":[{"award-number":["(No.2017FH001-008)"]}]},{"name":"This work is supported by the National Natural Science Foundation of China","award":["(No. 51605107)"],"award-info":[{"award-number":["(No. 51605107)"]}]},{"name":"Guizhou Provincial Science and Technology Foundation","award":["(Qiankehejichu [2016]1063)"],"award-info":[{"award-number":["(Qiankehejichu [2016]1063)"]}]},{"name":"The Joint Fund of Guizhou Province","award":["(No. 20167105)"],"award-info":[{"award-number":["(No. 20167105)"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Micromachines"],"abstract":"<jats:p>An omnidirectional inertial switch with rectangular spring is proposed in this paper, and the prototype has been fabricated by surface micromachining technology. To evaluate the threshold consistency and stability of omnidirectional inertia switch, the stiffness of rectangular suspension springs is analyzed. The simulation result shows that the coupling stiffness of the rectangular spring suspension system in the non-sensitive direction is a little more than that in the sensitive direction, which indicated that the omnidirectional switching system\u2019s stability is reinforced, attributed to the design of rectangular springs. The dynamic response simulation shows that the threshold of the omnidirectional inertial switch using the rectangular suspension spring has high consistency in the horizontal direction. The prototype of an inertial switch is fabricated and tested successfully. The testing results indicate even threshold distribution in the horizontal direction. The threshold acceleration of the designed inertial switch is about 58 g in the X direction and 37 g in the Z direction; the contact time is about 18 \u03bcs.<\/jats:p>","DOI":"10.3390\/mi12040440","type":"journal-article","created":{"date-parts":[[2021,4,15]],"date-time":"2021-04-15T12:11:00Z","timestamp":1618488660000},"page":"440","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["The Design, Simulation and Fabrication of an Omnidirectional Inertial Switch with Rectangular Suspension Spring"],"prefix":"10.3390","volume":"12","author":[{"given":"Wenguo","family":"Chen","sequence":"first","affiliation":[{"name":"The College of Information Engineering, Qujing Normal University, Qujing 655000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rui","family":"Wang","sequence":"additional","affiliation":[{"name":"The College of Information Engineering, Qujing Normal University, Qujing 655000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huiying","family":"Wang","sequence":"additional","affiliation":[{"name":"The College of Information Engineering, Qujing Normal University, Qujing 655000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shulei","family":"Sun","sequence":"additional","affiliation":[{"name":"The College of Mechanical Engineering, Guizhou Institute of Technology, Guiyang 550003, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1088\/0960-1317\/10\/2\/304","article-title":"Additive electroplating technology as a post-CMOS process for the production of MEMS acceleration-threshold switches for transportation applications","volume":"10","author":"Michaelis","year":"2000","journal-title":"J. Micromech. Microeng."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Whitley, M.R., Kranz, M.S., Kesmodel, R., and Burgett, S.J. (2005, January 22\u201327). Latching shock sensors for health monitoring and quality control. Proceedings of the SPIE\u2014The International Society for Optical Engineering, San Jose, CA, USA.","DOI":"10.1117\/12.593348"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"490","DOI":"10.1016\/j.sna.2008.06.009","article-title":"Latching ultra-low power MEMS shock sensors for acceleration monitoring","volume":"147","author":"Currano","year":"2008","journal-title":"Sens. Actuators A Phys."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"646","DOI":"10.1109\/JMEMS.2012.2237385","article-title":"A Passive Inertial Switch Using MWCNT\u2013Hydrogel Composite with Wireless Interrogation Capability","volume":"22","author":"Kuo","year":"2013","journal-title":"J. Microelectromech. Syst."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"45512","DOI":"10.1038\/srep45512","article-title":"Shock-Resistibility of MEMS-Based Inertial Microswitch under Reverse Directional Ultra-High g Acceleration for IoT Applications","volume":"7","author":"Xu","year":"2017","journal-title":"Sci. Rep."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Jean, D.J., Smith, G., and Kunstmann, J. (2007). MEMS Multi-Directional Shock Sensor. (7,194,889), US Patent.","DOI":"10.1121\/1.2756464"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"45006","DOI":"10.1088\/0960-1317\/22\/4\/045006","article-title":"Fabrication and characterization of a multidirectional-sensitive contact-enhanced inertial microswitch with a electrophoretic flexible composite fixed electrode","volume":"22","author":"Yang","year":"2012","journal-title":"J. Micromech. Microeng."},{"key":"ref_8","first-page":"26","article-title":"MEMS Omni-directional Inertial Switch with the Slant of Mass","volume":"34","author":"Li","year":"2012","journal-title":"J. Dection Control"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"93","DOI":"10.1016\/j.sna.2014.02.035","article-title":"A novel MEMS omnidirectional inertial switch with flexible electrodes","volume":"212","author":"Zhanwen","year":"2014","journal-title":"Sens. Actuators A Phys."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"214","DOI":"10.1016\/j.sna.2017.12.068","article-title":"A low-g MEMS inertial switch with a novel radial electrode for uniform omnidirectional sensitivity","volume":"270","author":"Du","year":"2018","journal-title":"Sens. Actuators A Phys."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"827","DOI":"10.4028\/www.scientific.net\/AMR.472-475.827","article-title":"Design and Dynamics Simulation of a Micromachined Inertial Switch with Polymer-Metal Composite Fixed Electrode for Flexible Contact","volume":"472\u2013475","author":"Zhu","year":"2012","journal-title":"Adv. Mater. Res."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"1839","DOI":"10.1007\/s00542-010-1094-9","article-title":"A directly strain measuring method for electroplated nickel micro-tensile test","volume":"16","author":"Tang","year":"2010","journal-title":"Microsyst. Technol."},{"key":"ref_13","first-page":"237","article-title":"The Stiffness Analysis of MEMS Planar Microspring","volume":"29","author":"Li","year":"2007","journal-title":"Piezoelectrics Acoustooptics"},{"key":"ref_14","unstructured":"Anda, X.U., Zhanwen, X.I., and Nie, W. (2014, January 13\u201314). The Stiffness Analysis of Micro Spring Based on MEMS Technology. Proceedings of the International Conference on Mechanical Engineering and Mechanics, Wuhan, China."},{"key":"ref_15","unstructured":"Dakui, W., Wenzhong, L., Yongjia, X., Fufu, W., Fangyi, L., Xin, J., and Jun, L. (2015, January 7\u201311). The effect of micro-spring stiffness changes on the typical MEMS S & A device. Proceedings of the IEEE International Conference on Nano\/Micro Engineered & Molecular Systems, Xi\u2019an, China."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"963","DOI":"10.1109\/TMECH.2015.2463726","article-title":"Fabrication and Characterization of a Low-g Inertial Microswitch With Flexible Contact Point and Limit-Block Constraints","volume":"21","author":"Chen","year":"2016","journal-title":"IEEE\/ASME Trans. 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