本文選題：電致伸縮系數(shù) + 激光外差　； 參考：《發(fā)光學(xué)報(bào)》2017年12期

【摘要】：電致伸縮系數(shù)反映了壓電材料本身的固有屬性,是衡量電致伸縮特性的重要參數(shù)之一�；谀鎵弘娦�(yīng),準(zhǔn)確測(cè)量微小長(zhǎng)度變化量可實(shí)現(xiàn)電致伸縮系數(shù)的高精度測(cè)量。現(xiàn)有光學(xué)測(cè)量方法基于直接檢測(cè)光強(qiáng)分布獲取微小長(zhǎng)度變化量,但受光源功率穩(wěn)定性和環(huán)境擾動(dòng)制約,測(cè)量精度不高。為此,本文采用多光束激光外差技術(shù)融合多普勒振鏡正弦調(diào)制技術(shù),加載微小長(zhǎng)度變化量于外差信號(hào)頻率中,研究測(cè)量微小長(zhǎng)度變化量的外差信號(hào)理論模型及外差信號(hào)頻率與電致伸縮系數(shù)間數(shù)學(xué)模型,實(shí)現(xiàn)外差信號(hào)頻率檢測(cè)取代直接強(qiáng)度檢測(cè),消除光源穩(wěn)定性與環(huán)境擾動(dòng)影響,并且采用頻率解調(diào)可以同時(shí)獲取多個(gè)微小長(zhǎng)度變化量,對(duì)這些微小長(zhǎng)度變化量加權(quán)平均,最終可以進(jìn)一步提高電致伸縮系數(shù)的測(cè)量精度。以此為依據(jù),通過(guò)理論仿真研究待測(cè)樣品的電致伸縮系數(shù),結(jié)果表明:該方法的相對(duì)測(cè)量誤差僅為0.28%。與現(xiàn)有技術(shù)相比,測(cè)量精度提高了一個(gè)數(shù)量級(jí)。
[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.
【作者單位】： 黑龍江大學(xué)電子工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(61505050,61501176) 黑龍江省自然科學(xué)基金(F2015015) 黑龍江大學(xué)杰出青年科學(xué)基金(JCL201504) 中國(guó)博士后科學(xué)基金(2014M561381) 黑龍江省博士后科學(xué)基金(LBH-Z14178) 黑龍江省高校大學(xué)專項(xiàng)科研資金(HDRCCX-2016Z10) 大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練項(xiàng)目(201710212101) 黑龍江大學(xué)新世紀(jì)教育教學(xué)改革(創(chuàng)新創(chuàng)業(yè)教育專項(xiàng))(2017CCY007)資助項(xiàng)目~~
【分類號(hào)】：TM22
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本文編號(hào)：1982582