获得转速脉冲触发阈值的精确时标研究  

Study on Obtaining Thresholds Precise Time Mark of Tacho Pulses

作　　者：李之雄[1] 郭瑜[1] 刘文彬[1] 

机构地区：[1]昆明理工大学机械电子工程系,云南昆明650093

出　　处：《昆明理工大学学报（理工版）》2007年第6期12-16,共5页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：云南省自然科学基金资助项目(项目编号:2004E0011Q)

摘　　要：提出了一种基于脉冲沿准确估计的阈值时标精确插值新方法.在LabVIEW平台下,用模拟变速随机脉冲信号和实测转子试验台的光电转速脉冲对该算法进行了测试,证明该方法能有效消除阈值对误差的影响,能在较低采样率下实现阈值时标的精确插值.本方法比传统的线性插值方法具有更高的精度,在提高转转速计算精度上具有重要应用价值和现实意义.A new interpolation method based on precisely estimating edge of pulse is introduced in this paper.The algorithm is tested by using the new method to process both simulated random speed variable tacho pulse and actual testing tacho pulse on LabVIEW platform. It is proved through the results that the new interpolation method effectively eliminates the error caused by threshold and achieves high interpolation precision even under some low sample frequency. The method is able to achieve higher interpolation precision than traditional linear interpolation method, which is of great importance in improving precision on speed calculation.

关 键 词：插值 转速 脉冲 闽值 LABVIEW 旋转机械 

分 类 号：TH115[机械工程—机械设计及理论]