正弦调制多光束激光外差测量压电材料电致伸缩系数

发布时间：2018-06-05 16:10

  本文选题：电致伸缩系数 + 激光外差　； 参考：《发光学报》2017年12期

【摘要】：电致伸缩系数反映了压电材料本身的固有属性,是衡量电致伸缩特性的重要参数之一。基于逆压电效应,准确测量微小长度变化量可实现电致伸缩系数的高精度测量。现有光学测量方法基于直接检测光强分布获取微小长度变化量,但受光源功率稳定性和环境扰动制约,测量精度不高。为此,本文采用多光束激光外差技术融合多普勒振镜正弦调制技术,加载微小长度变化量于外差信号频率中,研究测量微小长度变化量的外差信号理论模型及外差信号频率与电致伸缩系数间数学模型,实现外差信号频率检测取代直接强度检测,消除光源稳定性与环境扰动影响,并且采用频率解调可以同时获取多个微小长度变化量,对这些微小长度变化量加权平均,最终可以进一步提高电致伸缩系数的测量精度。以此为依据,通过理论仿真研究待测样品的电致伸缩系数,结果表明:该方法的相对测量误差仅为0.28%。与现有技术相比,测量精度提高了一个数量级。
[Abstract]:The electrostrictive coefficient reflects the inherent property of the piezoelectric material itself. It is one of the important parameters to measure the electrostrictive characteristics. Based on the reverse piezoelectric effect, the accurate measurement of the small length variation can achieve the high precision measurement of the electrostrictive coefficient. The power stability of the light source and the environmental disturbance are restricted, and the measurement accuracy is not high. Therefore, this paper uses the multi beam laser heterodyne technique to fuse the Doppler vibrating mirror sine modulation technique, and loads the small length variation in the heterodyne signal frequency to study the heterodyne signal number theory model and the heterodyne signal frequency and the electrostrictive system for measuring the change of the small length. A number of mathematical models can be used to detect the heterodyne signal frequency detection instead of the direct intensity detection and eliminate the influence of the light source stability and environmental disturbance, and the frequency demodulation can simultaneously obtain a number of small length variations, and the measurement accuracy of the electrostrictive coefficient can be improved by weighted average of these small length changes. On the basis of the theoretical simulation, the electrostrictive coefficient of the samples to be measured is studied. The results show that the relative measurement error of the method is only 0.28%. compared with the existing technology, and the measurement accuracy is improved by an order of magnitude.
【作者单位】： 黑龙江大学电子工程学院;
【基金】：国家自然科学基金(61505050,61501176) 黑龙江省自然科学基金(F2015015) 黑龙江大学杰出青年科学基金(JCL201504) 中国博士后科学基金(2014M561381) 黑龙江省博士后科学基金(LBH-Z14178) 黑龙江省高校大学专项科研资金(HDRCCX-2016Z10) 大学生创新创业训练项目(201710212101) 黑龙江大学新世纪教育教学改革(创新创业教育专项)(2017CCY007)资助项目~~
【分类号】：TM22
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本文编号：1982582