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发明授权
CN101295177B 用于检测传感器采样流中的变化的方法和系统 有权

用于检测传感器采样流中的变化的方法和系统
摘要：
本发明涉及用于检测传感器采样流中的变化的方法和系统。一种检测由传感器获取的采样流中的变化的方法。在缓冲器中连续地存储由传感器随时间获取的采样流，其中，当所述缓冲器充满时，将最旧的采样丢弃并存储最新的采样，使得所述缓冲器形成在时间上前向滑动的采样窗。对于每个新的采样，将所述缓冲器划分成采样的包括第一子窗和第二子窗的所有可能的成对相邻子窗，使得最新的采样被存储在所述对的所述第二子窗中。确定采样的每对所述相邻子窗的所述第一子窗和所述第二子窗之间的差，并将最大差指定为品质分数。如果所述品质分数大于预定阈值，则发信号通知所述采样流中的变化。所述变化可以是突变的或渐变的。
摘要（英）：

A method detects a change in a stream of samples acquired by a sensor. A stream of samples acquired by a sensor over time is stored sequentially in a buffer in which an oldest sample is discarded and a newest sample is stored when the buffer is full, such that the buffer forms a window of samples sliding forward in time. For each new sample, the buffer is partitioned into all possible pairs of contiguous sub-windows of samples including a first sub-window and a second sub-window such that the newest sample is stored in the second sub-window of the pair. A difference is determined between the first and second sub-window of each pair of the contiguous sub-windows of samples, and a maximum difference is assigned as a merit score. A change in the stream of samples is signaled if the merit score is greater than a predetermine threshold. The change can be abrupt or gradual.

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