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Fundamental insights into the electrical signals of a piezoelectric sensor in a sliding condition
Nano Energy ( IF 17.6 ) Pub Date : 2022-06-10 , DOI: 10.1016/j.nanoen.2022.107487
Kwonsik Shin , Eunmin Choi , Minkyung Sim , Minsoo Kang , Ji-Woong Choi , SeungNam Cha , Hyuk-Jun Kwon , Hongki Kang , Jae Eun Jang

The piezoelectric mechanism represents a promising approach for advanced sensors that measure physical factors such as pressures, strain levels and even temperature responses to various stimuli. However, a conventional analysis of piezoelectric signals is mainly related to the peak output voltage for normal force, meaning that there remain numerous challenges to overcome when analyzing piezoelectric signals over time corresponding to complex or dynamic situations. Here, a fundamental analysis of piezoelectric signals for a dynamic change situation induced by sliding motion and resulting in the partial deformation of a piezoelectric material is introduced. Given that a piezoelectric voltage at a certain time represents the sum value of diploe moments in all piezoelectric material segments, in this respect, some parts are compressed and others are released, and we compared the electric signals between small segments and one unit cell to obtain a clue about the signal process and to confirm the mathematical formula. Based on the results of piezoelectric signal fitting with the exponential and error function, general solutions that can model piezoelectric signals were proposed to create artificial piezoelectric signals which corresponded to each small segment of the piezoelectric material. By comparing the artificial signals and actually measured signals, the general solution was optimized and the induced artificial piezoelectric signals were found to have good reliability and reproducibility. Various depth profiles with sliding motion could be calculated from the combination of artificial signals in the 0.6 mm, 0.9 mm, and 1.2 mm pressing conditions using piezoelectric integral values. In addition, the calculated depth profiles had a resolution of approximately 100 µm, and simultaneously measurable depth profiles were improved with more artificial signals.



中文翻译:

滑动条件下压电传感器电信号的基本见解

压电机制代表了先进传感器的一种有前途的方法,用于测量压力、应变水平甚至温度对各种刺激的响应等物理因素。然而,压电信号的常规分析主要与法向力的峰值输出电压有关,这意味着在分析与复杂或动态情况相对应的压电信号随时间推移时仍有许多挑战需要克服。在此,介绍了对由滑动运动引起的动态变化情况并导致压电材料部分变形的压电信号的基本分析。假设某一时刻的压电电压代表所有压电材料段中偶极矩的总和,在这方面,一些部分被压缩,一些部分被释放,我们比较了小段和一个单元之间的电信号,以获得信号过程的线索并确认数学公式。基于压电信号与指数函数和误差函数的拟合结果,提出了可以对压电信号进行建模的通用解决方案,以创建与压电材料的每个小段相对应的人工压电信号。通过人工信号与实测信号的比较,优化了通用解,发现感应人工压电信号具有良好的可靠性和重现性。结合 0.6 mm、0.9 mm 和 1 的人工信号,可以计算出各种具有滑动运动的深度剖面。使用压电积分值的 2 mm 压制条件。此外,计算出的深度剖面具有大约 100 µm 的分辨率,同时可测量的深度剖面通过更多的人工信号得到改善。

更新日期:2022-06-10
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