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    • 8. 发明授权
    • Method to transiently detect sample features using cantilevers
    • 使用悬臂瞬时检测样品特征的方法
    • US07360405B2
    • 2008-04-22
    • US11421352
    • 2006-05-31
    • Murti V. SalapakaAbu SebastianDeepak Ranjan Sahoo
    • Murti V. SalapakaAbu SebastianDeepak Ranjan Sahoo
    • G01B5/28G02B6/26
    • G01Q10/06G01Q20/02G01Q30/04G01Q60/32
    • An approach to determine cantilever movement is presented. An observer based state estimation and statistical signal detection and estimation techniques are applied to Atomic Force Microscopes. A first mode approximation model of the cantilever is considered and an observer is designed to estimate the dynamic states. The cantilever-sample interaction is modeled as an impulsive force applied to the cantilever in order to detect the presence of sample. A generalized likelihood ratio test is performed to obtain the decision rule and the maximum likelihood estimation of the unknown arrival time of the sample profile and unknown magnitude of it. The use of the transient data results in sample detection at least ten times faster than using the steady state characteristics.
    • 提出了一种确定悬臂运动的方法。 基于观察者的状态估计和统计信号检测和估计技术应用于原子力显微镜。 考虑了悬臂的第一模态近似模型,并设计了观测器来估计动态。 悬臂样品相互作用被建模为施加到悬臂的冲击力,以便检测样品的存在。 执行广义似然比检验以获得样本轮廓的未知到达时间的判定规则和未知到达时间的最大似然估计值及其未知幅度。 使用瞬态数据导致样品检测比使用稳态特性快至少十倍。
    • 9. 发明授权
    • Method to transiently detect samples in atomic force microscopes
    • 用原子力显微镜瞬时检测样品的方法
    • US07066014B2
    • 2006-06-27
    • US10953195
    • 2004-09-29
    • Murti V. SalapakaAbu SebastianDeepak Ranjan Sahoo
    • Murti V. SalapakaAbu SebastianDeepak Ranjan Sahoo
    • G01B5/28G02B6/26
    • G01Q10/06G01Q20/02G01Q30/04G01Q60/32
    • An approach to determine cantilever movement is presented. An observer based state estimation and statistical signal detection and estimation techniques are applied to Atomic Force Microscopes. A first mode approximation model of the cantilever is considered and a Kalman filter is designed to estimate the dynamic states. The tip-sample interaction is modeled as an impulsive force applied to the cantilever in order to detect the presence of sample. A generalized likelihood ratio test is performed to obtain the decision rule and the maximum likelihood estimation of the unknown arrival time of the sample profile and unknown magnitude of it. The use of the transient data results in sample detection at least ten times faster than using the steady state characteristics.
    • 提出了一种确定悬臂运动的方法。 基于观察者的状态估计和统计信号检测和估计技术应用于原子力显微镜。 考虑了悬臂的第一模态近似模型,并设计了卡尔曼滤波器来估计动态。 尖端 - 样品相互作用被建模为施加到悬臂的冲击力,以便检测样品的存在。 执行广义似然比检验以获得样本轮廓的未知到达时间的判定规则和未知到达时间的最大似然估计值及其未知幅度。 使用瞬态数据导致样品检测比使用稳态特性快至少十倍。