Frequency Bandwidth of Pressure Sensors Dedicated to Blast Experiments

Chalnot, Mathieu; Pons, Patrick; Aubert, Hervé

doi:10.3390/s22103790

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…We show that the characterization, in the frequency domain, of a pressure measurement chain is of prime importance since it can facilitate the true impact evaluation of optimized devices relative to commercial ones. A better understanding of the useful bandwidth is an important parameter since Chalnot et al have shown its importance in estimating the overpressure magnitude at the blast wave front, to obtain the desired accuracy [ 32 ].…”

Section: Discussion and Perspectivesmentioning

confidence: 99%

Toward Improvements in Pressure Measurements for Near Free-Field Blast Experiments

Lavayssière,

Lefrançois,

Crabos

et al. 2023

Sensors

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This paper proposes two ways to improve pressure measurement in air-blast experimentations, mostly for close-in detonations defined by a small-scaled distance below 0.4 m.kg−1/3. Firstly, a new kind of custom-made pressure probe sensor is presented. The transducer is a piezoelectric commercial, but the tip material has been modified. The dynamic response of this prototype is established in terms of time and frequency responses, both in a laboratory environment, on a shock tube, and in free-field experiments. The experimental results show that the modified probe can meet the measurement requirements of high-frequency pressure signals. Secondly, this paper presents the initial results of a deconvolution method, using the pencil probe transfer function determination with a shock tube. We demonstrate the method on experimental results and draw conclusions and prospects.

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Section: Discussion and Perspectivesmentioning

confidence: 99%

Toward Improvements in Pressure Measurements for Near Free-Field Blast Experiments

Lavayssière,

Lefrançois,

Crabos

et al. 2023

Sensors

Self Cite

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“…In the far field, where the explosion is sufficiently distant that only the propagating air shock interacts with the structure, reliable semi-empirical predictive methods exist for both the positive [ 2 ] and negative [ 3 ] phases of the blast wave for spherical and hemispherical charges. Well-controlled experimental studies using commercially available piezo-resistive or piezo-electric pressure sensors have repeatedly shown these methods to be accurate for scaled distances

m/kg

[ 4 , 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Temporally and Spatially Resolved Reflected Overpressure Measurements in the Extreme Near Field

Barr

Rigby

Clarke

et al. 2023

Sensors

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The design of blast-resistant structures and protective systems requires a firm understanding of the loadings imparted to structures by blast waves. While empirical methods can reliably predict these loadings in the far field, there is currently a lack of understanding on the pressures experienced in the very near field, where physics-based numerical modelling and semi-empirical fast-running engineering model predictions can vary by an order of magnitude. In this paper, we present the design of an experimental facility capable of providing definitive spatially and temporally resolved reflected pressure data in the extreme near field (Z<0.5 m/kg1/3). The Mechanisms and Characterisation of Explosions (MaCE) facility is a specific near-field evolution of the existing Characterisation of Blast Loading (CoBL) facility, which uses an array of Hopkinson pressure bars embedded in a stiff target plate. Maraging steel pressure bars and specially designed strain gauges are used to increase the measurement capacity from 600 MPa to 1800 MPa, and 33 pressure bars in a radial grid are used to improve the spatial resolution from 25 mm to 12.5 mm over the 100 mm radius measurement area. In addition, the pressure bar diameter is reduced from 10 mm to 4 mm, which greatly reduces stress wave dispersion, increasing the effective bandwidth. This enables the observation of high-frequency features in the pressure measurements, which is vital for validating the near-field transient effects predicted by numerical modelling and developing effective blast mitigation methods.

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High-Temperature Resistance BiScO₃–PbTiO₃ Nanofiber Overpressure Sensor for Free-Field Shock Waves Testing

Tong,

Hou,

Wang

et al. 2024

IEEE Trans. Instrum. Meas.

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Frequency Bandwidth of Pressure Sensors Dedicated to Blast Experiments

Cited by 3 publications

References 20 publications

Toward Improvements in Pressure Measurements for Near Free-Field Blast Experiments

Toward Improvements in Pressure Measurements for Near Free-Field Blast Experiments

Temporally and Spatially Resolved Reflected Overpressure Measurements in the Extreme Near Field

High-Temperature Resistance BiScO₃–PbTiO₃ Nanofiber Overpressure Sensor for Free-Field Shock Waves Testing

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