Piezoelectric Material Electrostriction Coefficient Measurement Method Combined Sinusoidal Modulation with Multi-beam Laser Heterodyne

ZHEN Jia-qi; ZHONG Wei-dan; BU Yingaridi; GAO Ya-chen; LIU Yong; WANG Sheng-qian; LI Yan-c

doi:10.3788/fgxb20173812.1661

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Piezoelectric Material Electrostriction Coefficient Measurement Method Combined Sinusoidal Modulation with Multi-beam Laser Heterodyne

更新时间：2020-08-12

- Piezoelectric Material Electrostriction Coefficient Measurement Method Combined Sinusoidal Modulation with Multi-beam Laser Heterodyne
- Chinese Journal of Luminescence Vol. 38, Issue 12, Pages: 1661-1667(2017)
- 作者机构：
  
  黑龙江大学电子工程学院, 黑龙江哈尔滨 150080
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(61505050,61501176);Natur
- DOI：10.3788/fgxb20173812.1661
  CLC： NO32
- Received：26 April 2017，
  
  Revised：03 June 2017，
  
  Published：05 December 2017
- 稿件说明：
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甄佳奇, 仲维丹, 布音嘎日迪等. 正弦调制多光束激光外差测量压电材料电致伸缩系数[J]. 发光学报, 2017,38(12): 1661-1667

ZHEN Jia-qi, ZHONG Wei-dan, BU Yingaridi etc. Piezoelectric Material Electrostriction Coefficient Measurement Method Combined Sinusoidal Modulation with Multi-beam Laser Heterodyne[J]. Chinese Journal of Luminescence, 2017,38(12): 1661-1667
甄佳奇, 仲维丹, 布音嘎日迪等. 正弦调制多光束激光外差测量压电材料电致伸缩系数[J]. 发光学报, 2017,38(12): 1661-1667 DOI： 10.3788/fgxb20173812.1661.

ZHEN Jia-qi, ZHONG Wei-dan, BU Yingaridi etc. Piezoelectric Material Electrostriction Coefficient Measurement Method Combined Sinusoidal Modulation with Multi-beam Laser Heterodyne[J]. Chinese Journal of Luminescence, 2017,38(12): 1661-1667 DOI： 10.3788/fgxb20173812.1661.

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 electrostriction coefficient can be accurately measured by using small length variation based on inverse piezoelectric effect. The conventional optical measuring method based on direct detection of light intensity distribution to obtain small length variation is restricted by light source power stability and environmental perturbation

and can not reach high measuring accuracy. This paper uses the combination of multi-beam laser heterodyne technique with sinusoidal modulation technique to load small length variation to the heterodyne signal frequency. By researching on the theoretical models of heterodyne signal for measuring small length variation

and the relationship between heterodyne signal frequency and electrostriction coefficient

the direct intensity detection can be replaced by heterodyne signal frequency detection

the effects of light source power stability and environmental perturbation can be removed. Many values of small length variation can be got by using the frequency demodulation simultaneously. Processing these values by weighted-average

can get length variation accurately

and eventually get value of electrostriction coefficient of piezoelectric material by the calculation. The measuring accuracy of electrostriction coefficient can be further improved. Based on this

the theoretical simulation research on electrostriction coefficient of testing sample can be acted

the obtained results show that the relative measurement error of this method is just 0.28%. The measuring accuracy is improved one order of magnitude compared with existing technique.

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references

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