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1. 中国科学院 上海技术物理研究所 上海,200083
2. 中国电子科技集团公司 第五十研究所,上海 200063
收稿日期:2012-02-13,
修回日期:2012-03-15,
网络出版日期:2012-05-10,
纸质出版日期:2012-05-10
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张旋, 潘鸣. 压电双晶片扫描器的低温迟滞蠕变特性[J]. 光学精密工程, 2012,20(5): 1064-1068
ZHANG Xuan, PAN Ming. Cryogenic hysteresis and creep characteristics of piezoelectric bimorph scanner[J]. Editorial Office of Optics and Precision Engineering, 2012,20(5): 1064-1068
张旋, 潘鸣. 压电双晶片扫描器的低温迟滞蠕变特性[J]. 光学精密工程, 2012,20(5): 1064-1068 DOI: 10.3788/OPE.20122005.1064.
ZHANG Xuan, PAN Ming. Cryogenic hysteresis and creep characteristics of piezoelectric bimorph scanner[J]. Editorial Office of Optics and Precision Engineering, 2012,20(5): 1064-1068 DOI: 10.3788/OPE.20122005.1064.
研究了用于空间红外相机低温光学系统的压电双晶片扫描器的低温迟滞蠕变问题。压电双晶片具有行程大
不发热
在低温下仍然能够工作等优点
然而由于压电陶瓷固有的迟滞蠕变特性
使得其扫描精度受到了较大的影响。本文在常温和低温下
对所研制的压电双晶片扫描器的迟滞和蠕变特性进行实验研究和特性对比。结果显示:尽管压电双晶片扫描器的迟滞量和蠕变量均有大幅度下降
但由于总行程的下降幅度更大
使得迟滞度和蠕变系数有较大上升;120 K下的迟滞度约为300 K下的2倍
120 K下的蠕变系数比300 K下的上升了一个数量级。低温下压电双晶片扫描器的迟滞和蠕变特性相比常温下更加严重
这给其在低温下的高精度应用带来了更大的影响。
The cryogenic hysteresis and creep characteristics of piezoelectric bimorph scanners for cryogenic optical systems in space infrared cameras were studied. The piezoelectric bimorph has superior characteristics of large displacement
high resolution
no self-heating
etc
.
moreover
it can work efficiently at a cryogenic temperature. However
the inherent hysteresis and creep characteristics of the piezoelectric bmorph have a large impact on the scanning accuracy when it is used for high precision scanning. In this paper
the hysteresis and creep characteristics of a fabricated piezoelectric bimorph scanner were experimentally studied at room temperature and cryogenic temperature and the results were compared. The results indicate that both hysteresis displacement and creep displacement of the piezoelectric bimorph scanner have a large decrease
but the decrease of total travel displacement is much larger
which leads the hysteresis rate and creep coefficient increase more large. The hysteresis rate at 120 K is twice that at 300 K and the creep coefficient at 120 K increases by an order of magnitude as compared with that at 300 K. Results mean that the hysteresis and creep characteristics of piezoelectric bimorph scanner at cryogenic temperature are more serious than it at room temperature
which will bring greater impact when it is used for high precision applications.
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