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Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function

A safety and arming device with a condition feedback function has been designed in this article to improve the intelligence and safety of ignition devices. The device achieves active control and recoverability by virtue of four groups of bistable mechanisms which consist of two electrothermal actuat...

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Autores principales: Wang, Kexin, Hu, Tengjiang, Zhao, Yulong, Ren, Wei, Wang, Yifei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10303067/
https://www.ncbi.nlm.nih.gov/pubmed/37374715
http://dx.doi.org/10.3390/mi14061130
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author Wang, Kexin
Hu, Tengjiang
Zhao, Yulong
Ren, Wei
Wang, Yifei
author_facet Wang, Kexin
Hu, Tengjiang
Zhao, Yulong
Ren, Wei
Wang, Yifei
author_sort Wang, Kexin
collection PubMed
description A safety and arming device with a condition feedback function has been designed in this article to improve the intelligence and safety of ignition devices. The device achieves active control and recoverability by virtue of four groups of bistable mechanisms which consist of two electrothermal actuators to drive a semi-circular barrier and a pawl. According to a specific operation sequence, the barrier is engaged by the pawl at the safety or the arming position. The four groups of bistable mechanisms are connected in parallel, and the device detects the contact resistance generated by the engagement of the barrier and pawl by the voltage division of an external resistor to determine the parallel number of the mechanism and give feedback on the device’s condition. The pawl as a safety lock can restrain the in-plane deformation of the barrier in the safety condition to improve the safety function of the device. An igniter (a NiCr bridge foil covered with different thicknesses of Al/CuO films) and boron/potassium nitrate (B/KNO(3), BPN) are assembled on both sides of the S&A device to verify the safety of the barrier. The test results show that the S&A device with a safety lock can realize the safety and arming functions when the thickness of the Al/CuO film is set to 80 μm and 100 μm.
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spelling pubmed-103030672023-06-29 Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function Wang, Kexin Hu, Tengjiang Zhao, Yulong Ren, Wei Wang, Yifei Micromachines (Basel) Article A safety and arming device with a condition feedback function has been designed in this article to improve the intelligence and safety of ignition devices. The device achieves active control and recoverability by virtue of four groups of bistable mechanisms which consist of two electrothermal actuators to drive a semi-circular barrier and a pawl. According to a specific operation sequence, the barrier is engaged by the pawl at the safety or the arming position. The four groups of bistable mechanisms are connected in parallel, and the device detects the contact resistance generated by the engagement of the barrier and pawl by the voltage division of an external resistor to determine the parallel number of the mechanism and give feedback on the device’s condition. The pawl as a safety lock can restrain the in-plane deformation of the barrier in the safety condition to improve the safety function of the device. An igniter (a NiCr bridge foil covered with different thicknesses of Al/CuO films) and boron/potassium nitrate (B/KNO(3), BPN) are assembled on both sides of the S&A device to verify the safety of the barrier. The test results show that the S&A device with a safety lock can realize the safety and arming functions when the thickness of the Al/CuO film is set to 80 μm and 100 μm. MDPI 2023-05-27 /pmc/articles/PMC10303067/ /pubmed/37374715 http://dx.doi.org/10.3390/mi14061130 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Kexin
Hu, Tengjiang
Zhao, Yulong
Ren, Wei
Wang, Yifei
Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function
title Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function
title_full Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function
title_fullStr Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function
title_full_unstemmed Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function
title_short Design of an Intelligent MEMS Safety and Arming Device with a Condition Feedback Function
title_sort design of an intelligent mems safety and arming device with a condition feedback function
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10303067/
https://www.ncbi.nlm.nih.gov/pubmed/37374715
http://dx.doi.org/10.3390/mi14061130
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