公开(公告)号：US20110227786A1

公开(公告)日：2011-09-22

申请号：US13034921

申请日：2011-02-25

申请人： TAKESHI ONO ,  Kazushi Suzuki ,  Takayuki Kaneso ,  Takayuki Nakata ,  Kenji Aoki

发明人： TAKESHI ONO ,  Kazushi Suzuki ,  Takayuki Kaneso ,  Takayuki Nakata ,  Kenji Aoki

IPC分类号： G01S19/40

CPC分类号： G01S19/07 ,  G01S19/08 ,  G01S19/20

摘要： To detect an abnormal value in a satellite positioning system with high precision even when the observation environment changes or there is the time series correlation between data. An abnormal value index calculation unit 11 calculates an abnormal value index at each time of time-series data such as a pseudo distance between each artificial satellite and a receiver in the satellite positioning system or the like. A dynamic model forming unit 12 dynamically forms a model from the abnormal value index in a predetermined period and calculates a change point index from the time-series abnormal value index based on the dynamic model. The change point index is an index for determining whether the time-series is a one-shot outlier from a dynamic model or the dynamic model itself of input data changes when the time-series value which suddenly increases and decreases exists. The abnormal value detection unit 13 compares the change point index with a threshold value set in advance and detects the abnormal value index corresponding to the change point index at that time as an abnormal value when the value of the change point index is greater than the threshold value.

摘要翻译： 即使观测环境发生变化或数据之间存在时间序列相关，也能高精度地检测卫星定位系统的异常值。 异常值指标计算单元11计算卫星定位系统等中每个人造卫星和接收机之间的伪距离等时间序列数据的每个时刻的异常值指标。 动态模型形成单元12在预定时段内从异常值索引动态地形成模型，并且基于动态模型从时间序列异常值指数计算变化点索引。 改变点索引是用于确定时间序列是否是动态模型的单次离群值，或者当突然增加和减少的时间序列值存在时输入数据的动态模型本身变化的索引。 异常值检测单元13将改变点索引与预先设定的阈值进行比较，当变化点索引的值大于阈值时，将与该时刻的变化点索引对应的异常值指标作为异常值进行检测 值。

公开(公告)号：US08878720B2

公开(公告)日：2014-11-04

申请号：US13034921

申请日：2011-02-25

申请人： Takeshi Ono ,  Kazushi Suzuki ,  Takayuki Kaneso ,  Takayuki Nakata ,  Kenji Aoki

发明人： Takeshi Ono ,  Kazushi Suzuki ,  Takayuki Kaneso ,  Takayuki Nakata ,  Kenji Aoki

IPC分类号： G01S19/40 ,  G01S19/20 ,  G01S19/08 ,  G01S19/07

CPC分类号： G01S19/07 ,  G01S19/08 ,  G01S19/20

摘要： To detect an abnormal value in a satellite positioning system with high precision even when the observation environment changes or there is the time series correlation between data. An abnormal value index calculation unit 11 calculates an abnormal value index at each time of time-series data such as a pseudo distance between each artificial satellite and a receiver in the satellite positioning system or the like. A dynamic model forming unit 12 dynamically forms a model from the abnormal value index in a predetermined period and calculates a change point index from the time-series abnormal value index based on the dynamic model. The change point index is an index for determining whether the time-series is a one-shot outlier from a dynamic model or the dynamic model itself of input data changes when the time-series value which suddenly increases and decreases exists. The abnormal value detection unit 13 compares the change point index with a threshold value set in advance and detects the abnormal value index corresponding to the change point index at that time as an abnormal value when the value of the change point index is greater than the threshold value.

摘要翻译： 即使观测环境发生变化或数据之间存在时间序列相关，也能高精度地检测卫星定位系统的异常值。 异常值指标计算单元11计算卫星定位系统等中每个人造卫星和接收机之间的伪距离等时间序列数据的每个时刻的异常值指标。 动态模型形成单元12在预定时段内从异常值索引动态地形成模型，并且基于动态模型从时间序列异常值指数计算变化点索引。 改变点索引是用于确定时间序列是否是动态模型的单次离群值，或者当突然增加和减少的时间序列值存在时输入数据的动态模型本身变化的索引。 异常值检测单元13将改变点索引与预先设定的阈值进行比较，当变化点索引的值大于阈值时，将与该时刻的变化点索引对应的异常值指标作为异常值进行检测 值。