Influence of thermal shock of piezoelectric pressure sensors on the measurement of explosion pressures

Krause, Tim; Meier, Mirko; Brunzendorf, J.

doi:10.1016/j.jlp.2021.104523

Cited by 14 publications

(8 citation statements)

References 1 publication

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“…Furthermore, the installation state of the sensor can also impact the accuracy of the measurement results [ 14 , 15 , 16 ]. Therefore, direct measurement of accurate shock wave overpressure values using pressure sensors requires high requirements for test site and sensor installation, which requires a large cost [ 17 , 18 , 19 ]. In contrast, measuring peak overpressure using the velocity method is an indirect approach that may help mitigate the significant interference encountered with direct pressure transducer methods.…”

Section: Introductionmentioning

confidence: 99%

Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

Zhang,

Peng,

Lin

et al. 2024

Sensors

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The measurement process of ground shock wave overpressure is influenced by complex field conditions, leading to notable errors in peak measurements. This study introduces a novel pressure measurement model that utilizes the Rankine−Hugoniot relation and an equilateral ternary array. The research delves into examining the influence of three key parameters (array size, shock wave incidence angle, and velocity) on the precision of pressure measurement through detailed simulations. The accuracy is compared with that of a dual-sensor array under the same conditions. Static explosion tests were conducted using bare charges of 0.3 kg and 3 kg TNT to verify the numerical simulation results. The findings indicate that the equilateral ternary array shock wave pressure measurement method demonstrates a strong anti-interference capability. It effectively reduces the peak overpressure error measured directly by the shock wave pressure sensor from 17.73% to 1.25% in the test environment. Furthermore, this method allows for velocity-based measurement of shock wave overpressure peaks in all propagation direction, with a maximum measurement error of 3.59% for shock wave overpressure peaks ≤ 9.08 MPa.

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Section: Introductionmentioning

confidence: 99%

Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

Zhang,

Peng,

Lin

et al. 2024

Sensors

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“…Flexible pressure sensors have been widely concerned by researchers due to their great application prospects in health monitoring, , medical care, , and human–computer interaction. , According to their sensing mechanism, flexible pressure sensors can be mainly divided into piezoresistive sensor, − piezocapacitive sensor, − and piezoelectric sensor. , Among them, piezocapacitive sensors have been widely studied because of their simple structure, low power consumption, good stability, and fast dynamic response. However, piezocapacitive sensors often face the problem of low sensitivity.…”

Section: Introductionmentioning

confidence: 99%

One-Step Laser Direct-Printing Process of a Hybrid Microstructure for Highly Sensitive Flexible Piezocapacitive Sensors

Chen

Guo

Xiao

et al. 2023

ACS Appl. Mater. Interfaces

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Microstructures can effectively improve the sensing performance of flexible piezocapacitive sensors. Simple, low-cost fabrication methods for microstructures are key to facilitating the practical application of piezocapacitive sensors. Herein, based on the laser thermal effect and the thermal decomposition of glucose, a rapid, simple, and low-cost laser direct-printing process is proposed for the preparation of a polydimethylsiloxane (PDMS)-based electrode with a hybrid microstructure. Combining the PDMS-based electrode with an ionic gel film, highly sensitive piezocapacitive sensors with different hybrid microstructures are realized. Due to the good mechanical properties brought about by the hybrid microstructure and the double electric layer induced by the ionic gel film, the sensor with a porous X-type microstructure exhibits an ultrahigh sensitivity of 92.87 kPa–1 in the pressure range of 0–1000 Pa, a wide measurement range of 100 kPa, excellent stability (>3000 cycles), fast response time (100 ms) and recovery time (101 ms), and good reversibility. Furthermore, the sensor is used to monitor human physiological signals such as throat vibration, pulse, and facial muscle movement, demonstrating the application potential of the sensor in human health monitoring. Most importantly, the laser direct-printing process provides a new strategy for the one-step preparation of hybrid microstructures on thermal curing polymers.

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“…Piezoelectric pressure sensors are widely used in shock wave pressure measurement because of their good dynamic characteristics and environmental adaptability (Wang et al , 2019; Feng and Ma, 2020; You and Ding, 2021). However, in a large number of explosion pressure tests, it was found that the missing consideration of the temperature influence on the piezoelectric pressure sensors was one of the main reasons for deviating results and a high variation (Krause et al , 2021). On the one hand, the indicators of the operating characteristics of piezoelectric pressure sensors are obtained by static and dynamic calibration at room temperature, which can meet the general engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Research on thermal protection of piezoelectric pressure sensor for shock wave pressure measurement in explosion field

Shi

Kong

2023

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Purpose The purpose of this study is to clarify the mechanism of ambient and transient temperature effects on piezoelectric pressure sensors, and to propose corresponding compensation measures. The temperature of the explosion field has a significant influence on the piezoelectric sensor used to measure the shock wave pressure. For accurate shock wave pressure measurement, based on the actual piezoelectric pressure sensors used in the explosion field, the effects of ambient and transient temperatures on the sensor should be studied. Design/methodology/approach The compensation method of the ambient temperature is discussed according to the sensor size and material. The theoretical analysis method of the transient temperature is proposed. For the transient temperature conduction problem of the sensor, the finite element simulation method of structure-temperature coupling is used to solve the temperature distribution of the sensor and the change in the contact force on the quartz crystal surface under the step and triangle temperatures. The simulation results are highly consistent with the theory. Findings Based on the analysis results, a transient temperature control method is proposed, in which 0.5 mm thick lubricating silicone grease is applied to the sensor diaphragm, and 0.2 mm thick fiberglass cloth is wrapped around the sensor side. Simulation experiments are carried out to verify the feasibility of the control method, and the results show that the control method effectively suppresses the output of the thermal parasitic. Originality/value The above thermal protection methods can effectively improve the measurement accuracy of shock wave pressure and provide technical support for the evaluation of the power of explosion damage.

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Influence of thermal shock of piezoelectric pressure sensors on the measurement of explosion pressures

Cited by 14 publications

References 1 publication

Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array

One-Step Laser Direct-Printing Process of a Hybrid Microstructure for Highly Sensitive Flexible Piezocapacitive Sensors

Research on thermal protection of piezoelectric pressure sensor for shock wave pressure measurement in explosion field

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