Susceptibility of Electro-explosive Devices to Microwave Interference

Pantoja, John J.; Peña, Néstor; Rachidi, Farhad; Vega, Félix; Román, Francisco

doi:10.14429/dsj.63.2434

Cited by 10 publications

(7 citation statements)

References 16 publications

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“…2 However, electronic detonators are relatively expensive, require complex wire connections, are prone to triggering from false stimuli such as radio-frequency pick-up and often require substantial power pulses for initiation. 3,4 Although emerging technology can circumvent some of these issues with wireless initiation signals and radio frequency identification safety mechanisms, such features add significant complexity and cost to the detonation apparatus. 5 An alternative pyrotechnic initiation method is detonation transmission tubing (shock tube), which consists of hollow polymer tube coated with a layer of high explosive.…”

mentioning

confidence: 99%

Printable sensors for explosive detonation

Griffith

Cooling

Elkington

et al. 2014

Applied Physics Letters

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Here, we report the development of an organic thin film transistor (OTFT) based on printable solution processed polymers and employing a quantum tunnelling composite material as a sensor to convert the pressure wave output from detonation transmission tubing (shock tube) into an inherently amplified electronic signal for explosives initiation. The organic electronic detector allows detection of the signal in a low voltage operating range, an essential feature for sites employing live ordinances that is not provided by conventional electronic devices. We show that a 30-fold change in detector response is possible using the presented detector assembly. Degradation of the OTFT response with both time and repeated voltage scans was characterised, and device lifetime is shown to be consistent with the requirements for on-site printing and usage. The integration of a low cost organic electronic detector with inexpensive shock tube transmission fuse presents attractive avenues for the development of cheap and simple assemblies for precisely timed initiation of explosive chains.

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mentioning

confidence: 99%

Printable sensors for explosive detonation

Griffith

Cooling

Elkington

et al. 2014

Applied Physics Letters

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“…Such ionic movement requires much lower driving voltages than typical electrostatic field-induced doping, confirmed by the extraordinarily low −0.3 V turn-on voltage of the device in the transfer characteristic of the transistor ( Figure 3 e). Whilst this low turn-on voltage is a significant advantage for environments where electromagnetic signals interfere with operations, [ 29 ] there is also an associated risk of electromagnetic interference with such small signals. However, the OTFT switches the voltage signal into an inherently amplified current output signal (on/off ratio of ~10 2 from the transfer characteristic).…”

Section: Resultsmentioning

confidence: 99%

“…Conventional electronic detectors meet a key requirement of energetic event detection technology by providing precise timing control on the sub-millisecond time scale and simple multiplexing through the programming of delay times of individual events [ 27 ]. However, these detectors are expensive, involve components that operate at high voltages and are prone to failure through inadvertent short-circuits or false triggering from electromagnetic interference [ 28 , 29 ]. Some of these issues have been addressed with modern developments such as wireless initiation signals and RFID safety mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Controlling Nanostructure in Inkjet Printed Organic Transistors for Pressure Sensing Applications

et al. 2021

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This work reports the development of a highly sensitive pressure detector prepared by inkjet printing of electroactive organic semiconducting materials. The pressure sensing is achieved by incorporating a quantum tunnelling composite material composed of graphite nanoparticles in a rubber matrix into the multilayer nanostructure of a printed organic thin film transistor. This printed device was able to convert shock wave inputs rapidly and reproducibly into an inherently amplified electronic output signal. Variation of the organic ink material, solvents, and printing speeds were shown to modulate the multilayer nanostructure of the organic semiconducting and dielectric layers, enabling tuneable optimisation of the transistor response. The optimised printed device exhibits rapid switching from a non-conductive to a conductive state upon application of low pressures whilst operating at very low source-drain voltages (0–5 V), a feature that is often required in applications sensitive to stray electromagnetic signals but is not provided by conventional inorganic transistors and switches. The printed sensor also operates without the need for any gate voltage bias, further reducing the electronics required for operation. The printable low-voltage sensing and signalling system offers a route to simple low-cost assemblies for secure detection of stimuli in highly energetic systems including combustible or chemically sensitive materials.

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“…To be specific, such a device consists of EED, conductive explosive synthetic detonator, semiconductor bridge electric exploding device, laser exploding device, etc. [2][3][4][5]. e EED has been commonly employed to ignite gunpowder and detonate explosives, and it can also act as a small driving device for rapid valve opening, arming, and rocket separation [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Equivalent Test Method for Strong Electromagnetic Field Radiation Effect of EED

Wang

Sun²,

Wang

et al. 2021

International Journal of Antennas and Propagation

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The present study proposed the equivalent test method for the strong electromagnetic field radiation of electric explosive devices (EEDs) of the weapon equipment to satisfy the military requirements of the electromagnetic radiation safety test, as well as the evaluation of the electric ignition, the electric initiation ammunition, or missiles. Under stable conditions, the ignition excitation test and the bridge wire temperature increase test were performed to determine the ignition temperature of the EED. As radiated by the strong electromagnetic field, the relationship between the temperature increase of the bridge wire and the electric field intensity of the EED was developed based on the theoretical analysis and the experimental test. Given the ignition temperature of the EED, the radiation field intensity of the EED at 50% ignition was determined. As compared with the 50% ignition field intensity of the EED directly radiated by the strong electromagnetic field, an error less than 1 dB was caused. On that basis, the correctness of the equivalent test method was verified. Accordingly, this method was suggested to act as an effective method and technical means to test and evaluate the electromagnetic radiation safety of ammunition and missiles in unfavorable electromagnetic environments.

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Susceptibility of Electro-explosive Devices to Microwave Interference

Cited by 10 publications

References 16 publications

Printable sensors for explosive detonation

Printable sensors for explosive detonation

Controlling Nanostructure in Inkjet Printed Organic Transistors for Pressure Sensing Applications

Equivalent Test Method for Strong Electromagnetic Field Radiation Effect of EED

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