Reproducibility of C. I. P.-compatible dynamic pressure measurements

Slanina, Oliver; Quabis, Susanne; Wynands, R.

doi:10.1515/teme-2020-0060

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…The measurement chain provides the reading of the pressure pulse inside the barrel, which has the particularity of high-pressure levels reached in a few milliseconds [16,17]. A typical pressure-time curve that characterizes the interior ballistics of ammunition is shown in Figure 4.…”

Section: Interior Ballistics-internal Pressure Measurementmentioning

confidence: 99%

Modeling of Ammunition Dynamic Pressure Measurement Chain in Ballistic Tests

Felix,

Medeiros,

Barbosa

2023

Sensors

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The use of piezoelectric transducers for internal dynamic pressure measurements in ammunition testing provides a significant advantage in the development and performance analysis of weapons and ammunition. Knowledge of the electrical characteristics of the dynamic pressure measurement chain, which includes the piezoelectric transducer and the charge amplifier, is a relevant condition for the design of interior ballistics pressure measurement systems. Thus, this study aims to characterize and model a piezoelectric transducer and its associated charge amplifier. First, the piezoelectric transducer was characterized using impedance analysis and modeled using a least squares curve-fitting tool, according to the Butterworth–Van Dyke model. Next, the charge amplifier was characterized through response analysis based on known inputs and modeled using LTSpice simulation techniques and the least squares curve-fit tool. Consequently, a measurement chain model is presented and simulated for two cases with different impulse signals. The first impulse signal was obtained from an interior ballistics computer simulation, and in the second case, it was considered the negative step signal characteristic of the calibration of piezoelectric transducers by means of dead weight. From the simulations, it was possible to verify the effectiveness of the model, which provided results with a low error in relation to the original pressure curve, and its applicability is demonstrated by the result of the simulation of the pressure variation in the calibration, where the attenuation of the signal can be visualized as the characteristic of the input curve changes.

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Section: Interior Ballistics-internal Pressure Measurementmentioning

confidence: 99%

Modeling of Ammunition Dynamic Pressure Measurement Chain in Ballistic Tests

Felix,

Medeiros,

Barbosa

2023

Sensors

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“…Also, this method is not suitable for velocity measurement at positions located deep inside the barrel. In the Lumiline, Sky screen, and optical screen 12,13 methods, a beam of light is focused on a screen. 3 When the projectile passes by the screen, the intensity of light changes significantly, and such a change is used to determine to identify the time of arrival of the projectile.…”

Section: Introductionmentioning

confidence: 99%

Strain gauge-based method to determine in-cylinder projectile velocity and gas pressure

Vattaparambil Sreedharan,

Tiwari,

Mathur

et al. 2023

The Journal of Strain Analysis for Engineering Design

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Knowledge of internal ballistic pressure and projectile velocity is required to ensure gun safety, reliability, calculation of its range, and evaluation of ammunition. However, existing methods for determining the same are either overly complex, costly or have limitations in their applicability. In this work, the authors address this need by proposing a reliable, simple, cheap, and non-destructive method for determining in-bore pressure, projectile velocity, and acceleration profile using strain measurements. Data from strain gauges were used to detect the projectile’s arrival time at different locations in the barrel and computed projectile velocity and acceleration as a function of projectile position. Finally, acceleration data was used to calculate the pressure behind the projectile. Results were verified using alternative experimental and simulation techniques on two different barrels with different ammunition. It was found that the proposed method works well and thus can be reliably used in similar applications elsewhere.

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Reproducibility of C. I. P.-compatible dynamic pressure measurements

Cited by 2 publications

References 2 publications

Modeling of Ammunition Dynamic Pressure Measurement Chain in Ballistic Tests

Modeling of Ammunition Dynamic Pressure Measurement Chain in Ballistic Tests

Strain gauge-based method to determine in-cylinder projectile velocity and gas pressure

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