一种压阻式压力传感器的温度补偿方法

针对压阻式压力传感器的温度补偿问题,提出一种将样条插值与最小二乘拟合相结合的补偿算法,并结合传感器标定实验数据进行仿真试验。结果表明该方法相比曲面拟合方法、BP神经网络和RBF神经网络,补偿最大相对误差和平均补偿时间分别为0.103%和0.135 4 s,不仅能够满足高精度测试要求,而且可减少标定工作量达到提升生产效率的目的。国家科技重大专项项目(2015ZX03003010

Study on subsurface damage depth and morphology of optical elements

根据化学蚀刻法,提出了一种光学元件亚表面损伤的检测方法,分别观测了磨削和抛光后k9玻璃蚀刻后的亚表面损伤。研究表明:光学元件磨削亚表面损伤在光学显微镜下的表现形式为弹坑状缺陷和脆性裂纹;光学元件抛光后也产生了亚表面缺陷,其在AfM下的表现形式为细长条纹状划痕。In this paper,a detection way of subsurface damage in optical elements was put forward based on the chemical etching method.After grinding and polishing,we observed the subsurface damage of K9 glass under different etching time.The study indicates that the manifestations of the grinding subsurface damage under optical microscope are crater-like defects and brittle cracks;the optical elements also has subsurface damage after polishing,and the polishing subsurface damage under AFM manifests as slender striped scratches.国家自然基金项目(51275433); 福建省自然科学基金项目(2010J05122

Research on Detection of Subsurface Damage on Grinding Optical Elements

基于氢氟酸刻蚀对光学元件亚表面裂纹影响的刻蚀模型,将化学刻蚀、逐层抛光技术和激光共聚焦扫描技术相结合,提出了一种磨削加工光学元件亚表面损伤的检测方法。实验证实该方法得到的亚表面损伤深度与公认的亚表面损伤预测模型的预测结果吻合性较好,是一种可靠的亚表面深度检测方法。Based on the etching model which hydrofluoric acid etching has an impact on the subsurface cracks of the optical elements, combined chemical etching, step-by-step polishing techniques and confocal laser scanner,a method of detecting sub-surface damage of the optical element was proposed.Research shows that this detection method is intuitive and effective,and the depth of subsurface damage match with the grinding results predicted by the model.国家自然科学基金(51275433); 福建省自然科学基金(2012J05098