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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Peculiarities of Performance of Piezoelectric Sensors under a Linear Increase in Pressure
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Peculiarities of Performance of Piezoelectric Sensors under a Linear Increase in Pressure

机译：压力下压力下压力传感器性能的特性

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The electric response and processes occurring in piezoelectric elements subjected to pulsed pressure are usually described for two extreme cases: when the time of pressure variation is much longer than the time of propagation of an acoustic wave through a piezoelectric element, when the pressure in the piezoelectric element can be treated as constant (thin sensor regime), and under loading by a rectangular shock wave, when the shock front divides the piezoelectric element into the compressed and uncompressed zones (thick sensor regime). In the former case, the voltage across the piezoelectric element and electric fields emerging in it directly depend on the electric load, and the induced charge is proportional to the applied pressure (in the linear region). In the latter case, the current generated by the piezoelectric element is proportional to the shock load pressure, and the fields in the bulk of the piezoelectric element appear even in the case of short-circuiting of its electrodes. In this study, we consider the electric response of piezoelectrics to the action of pressure, which noticeably varies during the time commensurate with the time of propagation of the shock wave through the piezoelectric element. Such a situation takes place, for example, when a high-velocity particle flow formed when the shock wave emerging on the free surface of the metal plate (dusting) [1-4] is incident on the piezoelectric sensor. The calculations based on the constructed mathematical model show that under an increasing pressure on the piezoelectric element, electric fields with magnitudes depending on the rate of pressure increase and nonuniform over the piezoelectric element thickness appear in its bulk, and the induced electric charge is proportional to the average pressure in the piezoelectric element. Under certain conditions, these fields can attain values leading to the emergence of breakdown in the piezoelectric element and to distortion of generated signals. We consider experimentally observed cases of manifestation of breakdown effects under the action of rapidly increasing pressures in piezoelectric elements.
机译：在经过脉冲压力的压电元件中发生的电响应和过程通常用于两个极端情况：当压力变化的时间远大于声波通过压电元件传播时，当压电中的压力时当冲击前将压电元件划分为压缩和未压缩的区域（厚传感器状态）时，元件可以被视为恒定（薄的传感器状态），并通过矩形冲击波加载。在前一种情况下，压电元件和电场上的电压直接出现在其上直接取决于电负载，并且感应电荷与施加的压力成比例（在线性区域中）。在后一种情况下，由压电元件产生的电流与冲击负载压力成比例，并且即使在其电极短路的情况下，压电元件中的大部分的场也会出现。在这项研究中，我们考虑压电的电响应对压力的作用，这在与通过压电元件传播时的时间相比变化。例如，当当在金属板（除尘）[1-4]的自由表面上的冲击波发生在压电传感器上时形成的高速粒子流动时，发生这种情况。基于构造的数学模型的计算表明，在压电元件上的增加压力下，根据压力增加率和压电元件厚度的不均匀的电场在其体积中出现，并且诱导的电荷与其成比例压电元件中的平均压力。在某些条件下，这些领域可以实现导致压电元件中击穿的出现并产生产生的信号的失真。我们考虑通过在压电元件中快速增加压力的作用下进行实验观察到的击穿效应的表现案例。

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    Antipov M. V.; Yurtov I. V.; Utenkov A. A.; Fedoseev A. V.; Ogorodnikov V. A.; Mikhailov A. L.;

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    Fed State Unitary Enterprise Russian Fed Nucl Ctr Inst Explos Phys Sarov 607188 Nizhny Novgorod Russia;

    Fed State Unitary Enterprise Russian Fed Nucl Ctr Inst Explos Phys Sarov 607188 Nizhny Novgorod Russia;

    Fed State Unitary Enterprise Russian Fed Nucl Ctr Inst Explos Phys Sarov 607188 Nizhny Novgorod Russia;

    Fed State Unitary Enterprise Russian Fed Nucl Ctr Inst Explos Phys Sarov 607188 Nizhny Novgorod Russia;

    Fed State Unitary Enterprise Russian Fed Nucl Ctr Inst Explos Phys Sarov 607188 Nizhny Novgorod Russia;

    Fed State Unitary Enterprise Russian Fed Nucl Ctr Inst Explos Phys Sarov 607188 Nizhny Novgorod Russia;

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