A Manganin Thin Film Ultra-High Pressure Sensor for Microscale Detonation Pressure Measurement

Zhang, Guodong; Zhao, Yang; Zhao, Yun; Wang, Xinchen; Wei, Xueyong; Ren, Wei; Li, Hui

doi:10.3390/s18030736

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…Sensors 2020, 20, 2395 6 of 15 PVDF sensors and steel plates are two media with different wave impedances. Shock waves will interfere when passing through different media, and the thinner the thickness, the less obvious the interference effect [23]. According to Li [24], the polytetrafluoroethylene (PTFE) protective device with thickness less than 0.5 mm will not significantly interfere with the tested explosion pressure.…”

Section: Pvdf Sensor Designmentioning

confidence: 99%

Indoor Test System for Liquid CO2 Phase Change Shock Wave Pressure with PVDF Sensors

Huang

Wei

et al. 2020

Sensors

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Liquid carbon dioxide phase change fracturing technology (LCPCFT) has been widely used in engineering blasting due to the advantage of no flames, and no toxic and harmful gas. However, few studies have been conducted on the acquisition of shock wave pressure and its loading characteristics, which are key parameters in fracturing. Referring to the CO 2 in-situ fracturing technology, an indoor test system for shock wave pressure generated during LCPCFT has been built, with a protected polyvinylidene fluoride (PVDF) piezoelectric sensor. Then three verification experiments with different radial distances between the fracturing tube and test points were carried out on the test system, and in each experiment, four PVDF sensors as four test points were arranged with different axial distance from the detonating point to test the pressure distribution. The experimental results show that when the radial distance between the fracturing tube and test points is not too large (≤345 mm), the pressure generated during LCPCFT is approximately uniformly distributed within the axial length of the fracturing tube, but when it is relatively large (≈895 mm), the results between different test points are in a certain degree of dispersion. And finally, this paper uses the intraclass correlation coefficient (ICC) and coefficient of variation (C V ) of peak pressure and impulse to process the test results to evaluate the reliability and stability of the test system. Evaluation results show that the test results are in good consistency. The test system in this paper has good stability and high reliability. The test system provides a useful tool for accurately obtaining the shock wave pressure, which is helpful for further research on LCPCFT.Hu [6] conducted permeability enhancement experiments of a coal seam by using LCPCFT; the test results show that cracks generated inside the coal seam will greatly increase the gas permeability of the coal seam. In addition, the process of LCPCFT is endothermic, which belongs to cold blasting, so the process of permeability enhancement is safer and more environmentally friendly. Because the small surface tension of supercritical CO 2 , it can penetrate into the interior of rock mass along the cracks, therefore the rock failure is accompanied by the generation of tensile cracks [7], and its rock breaking ability is usually better than that of a water jet [8]. Under the effect of competitive adsorption, the gaseous CO 2 produced during the fracturing process will convert the gas absorbed in the coal seam to a free state, which will increase the amount of gas released and reduce the possibility of a gas outburst during excavation [9]. Through experiments and numerical simulations, Sun [10] believed that the rock breaking under LCPCFT is the result of a stress wave and gasified CO 2 ,and the influence of initial confining pressure and blasting pressure on the effect of LCPCFT are also analyzed [11]. Zhu [12] analyzed the damage evolution process of concrete specimens under the action of high-pressure gas e...

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Section: Pvdf Sensor Designmentioning

confidence: 99%

Indoor Test System for Liquid CO2 Phase Change Shock Wave Pressure with PVDF Sensors

Huang

Wei

et al. 2020

Sensors

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“…The detonation pressure can be calculated from thermodynamical codes, estimated using empirical correlations from VoD and loading density (ρ) [10][11] or determined experimentally. Considering the time-scale of the phenomenon and the severe conditions of pressure and temperature [8], direct measurement of the detonation pressure using in situ gauges [12] such as Polyvinylidene fluoride (PVDF) piezoelectric [13] or Manganin piezoresistive sensors [14] is challenging and not yet widely applied or validated, especially when considering kg-scale non-ideal explosive charges.…”

Section: Introductionmentioning

confidence: 99%

Urea‐Hydrogen Peroxide (UHP): Comparative study on the experimental detonation pressure of a non‐ideal explosive

Halleux,

Pons,

Wilson

et al. 2023

Propellants Explo Pyrotec

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Carbamide Peroxide, an adduct of Urea and Hydrogen Peroxide (UHP) industrially used as a solid source of hydrogen peroxide, exhibits the behaviour of a tertiary explosive but a detailed performance characterisation is still lacking in the literature. In this work, we calculated a 20 % experimental TNT equivalence for brisance, i. e. the shattering effect from the shock wave transmitted from the detonating high explosive into adjacent materials, by experimental indirect measurement of UHP detonation pressure. We determined a 3.5 GPa detonation pressure for 5 kg unconfined UHP charges (0.87 g/cm3, 120 mm charge diameter) by measuring the attenuated shock wave velocity (ASV) in adjacent inert materials using passive optical probes. Particle velocity measurements at the interface of a PMMA impedance window carried out with Photonic Doppler Velocimetry on scaled‐down charges of 90 g UHP under heavy confinement (0.85 g/cm3, 30 mm charge diameter, 4 mm thick steel) are consistent with ASV results in the PMMA acceptors but further investigations are required to determine the detonation pressure, using a small‐scale experimental setup. The ASV method has proven reliable to assess the brisance of a non‐ideal explosive for risk assessment purposes.

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“…Nowadays, manganin pressure gauges and external dynamic testing systems (EDTSs) are commonly used for explosive safety measurement. e manganin gauges are usually placed on the explosive surface to measure the shock pressure [11,[14][15][16]. e EDTS consists of individual instruments such as signal conditioner and digital storage oscilloscope, which are placed in a laboratory for data acquisition.…”

Section: Introductionmentioning

confidence: 99%

A Miniature and Low-Power-Consumption Stress Measurement System for Embedded Explosive in Multilayer Target Penetration

Shang

Gao

et al. 2020

Shock and Vibration

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When a penetrator penetrates a target, security issues such as detonation and deflagration sometimes occur in the embedded explosive under an extreme environment with high overload and severe mechanical shock. Explosives withstand multiple impact stresses with high amplitudes during a multilayer target penetration (MTP) process. Manganin pressure gauges and external dynamic testing systems are common instruments to evaluate explosive safety. However, this method is unsuitable for an MTP experiment where the penetrator flies with a long distance. This article proposes a stress measurement system (SMS) installed in a penetrator for explosive stress detection based on a qualitative analysis for the stress characteristics of the explosive. A high-strength mechanical structure is designed for the SMS to survive in the MTP environment. A low-power management mechanism realized by dual MCUs (STM32 + FPGA) is proposed to reduce the power consumption of the SMS. An experimental investigation is carried out to verify the feasibility of the measurement system designed in this paper. An MTP numerical simulation is carried out to reveal the characteristics of stress occurring and propagating in the explosive. An MTP experiment is conducted and the impact stresses on the explosive surface are measured by the fabricated SMS prototypes. The measurement results are consistent with the simulation results, which indicate that the prototypes have the abilities of high-precision data acquisition and storage in the MTP experiment.

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A Manganin Thin Film Ultra-High Pressure Sensor for Microscale Detonation Pressure Measurement

Cited by 12 publications

References 17 publications

Indoor Test System for Liquid CO2 Phase Change Shock Wave Pressure with PVDF Sensors

Indoor Test System for Liquid CO2 Phase Change Shock Wave Pressure with PVDF Sensors

Urea‐Hydrogen Peroxide (UHP): Comparative study on the experimental detonation pressure of a non‐ideal explosive

A Miniature and Low-Power-Consumption Stress Measurement System for Embedded Explosive in Multilayer Target Penetration

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