Design, fabrication and operation of a wireless and miniature ignition system

Abstract A wireless miniature ignition system has been developed for secure micro ignition applications. The power and data are transmitted using electromagnetic radio frequency waves between two closely coupled coils. The distance between the two coils is of 200 μm. High frequency (13.56 MHz) has been used enabling us to use coils made with PCB technology with only three copper wires with a separation between turns of 120 μm. A fully integrated prototype has been built and tested. It is 3 mm thick and has a section area close to 40 mm 2 (7 mm of diameter). When the command occurs, the system assures the application of enough electrical power (150 mW) to ignite a pyrotechnical powder in contact with the resistor of the ignition system. The measured electromagnetic energy transfer efficiency is up to 50% in normal environmental conditions (air surrounded). The difference between the experimental electromagnetic energy transfer efficiency and model prediction (67%) is due to bad coupling. The implemented solution to increase the electromagnetic energy transfer efficiency is to surround the coils with a magnetic polymer: it increases the energy transfer efficiency up to 72% in the air.

[1]  Wai-Kai Chen,et al.  The circuits and filters handbook , 2009 .

[2]  Masayoshi Esashi,et al.  MEMS-Based Solid Propellant Rocket Array Thruster , 2003 .

[3]  K. Pister,et al.  Microrockets for Smart Dust , 2001 .

[4]  C. Kergueris,et al.  Miniature pressure acquisition microsystem for wireless in vivo measurements , 2000, 1st Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology. Proceedings (Cat. No.00EX451).

[5]  Carole Rossi,et al.  Micropyrotechnics, a new technology for making energetic microsystems : review and prospective , 2005 .

[6]  Wilfried Mokwa,et al.  Planar coils with magnetic layers for optimized energy transfer in telemetric systems , 2004 .

[7]  Babak Ziaie,et al.  Inductive link modeling and design guidelines for optimum power transfer in implantable wireless microsystems , 2003, Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439).

[8]  T. Troianello,et al.  Precision foil resistors used as electro-pyrotechnic initiators , 2001, 2001 Proceedings. 51st Electronic Components and Technology Conference (Cat. No.01CH37220).

[9]  Lei Wang,et al.  Networked wireless microsystem for remote gastrointestinal monitoring , 2003, TRANSDUCERS '03. 12th International Conference on Solid-State Sensors, Actuators and Microsystems. Digest of Technical Papers (Cat. No.03TH8664).

[10]  R. Boudreau.  Foreword contributions from the 50th electronic components and technology conference , 2001 .

[11]  Maysam Ghovanloo,et al.  Fully integrated power supply design for wireless biomedical implants , 2002, 2nd Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine and Biology. Proceedings (Cat. No.02EX578).

[12]  Mark G. Allen,et al.  Solid-phase conductive fuels for chemical microactuators , 2004 .

[13]  Robert Puers,et al.  Wireless energy transfer for stand-alone systems: a comparison between low and high power applicability , 2001 .

[14]  Lei Wang,et al.  Design and implementation considerations for an advanced wireless interface in miniaturized integrated sensor microsystems , 2003, Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439).

[15]  Daniel Esteve,et al.  Development of MEMS based safe electro-thermal pyrotechnic igniter for a new generation of microfuze (Invited Paper) , 2005, SPIE Microtechnologies.

[16]  Donald Christiansen,et al.  Electronics Engineers' Handbook , 1975 .

[17]  Lamedica Giulio,et al.  Microthrusters in silicon for aerospace application , 2002 .

[18]  Carlos Couto,et al.  A wireless RF CMOS mixed-signal interface for soil moisture measurements , 2004 .

[19]  Yoonsu Choi,et al.  Polymeric microcombustors for solid-phase conductive fuels , 2004, 17th IEEE International Conference on Micro Electro Mechanical Systems. Maastricht MEMS 2004 Technical Digest.

[20]  Jin-Woo Choi,et al.  A functional on-chip pressure generator using solid chemical propellant for disposable lab-on-a-chip. , 2003, Lab on a chip.

[21]  Carole Rossi,et al.  Design, fabrication and modelling of MEMS-based microthrusters for space application , 2001 .

[22]  Robert Puers,et al.  An inductive power system with integrated bi-directional data-transmission , 2004 .