| 摘要 |
A speed detection method. A range finder acquires a specific number of distance measurement samples of an object during a period of time. A new unit of measurement larger than respective movement distances of the object in a first period and a second period is acquired. Rough measured distances D 1 and D 2 respectively corresponding to the locations of the object in the first period and the second period are calculated by comparing portions of the distance measurement samples corresponding to the first period and the second period utilizing the new unit of measurement. A scope is determined based on the D 1 and D 2 for filtering the distance measurement samples. The speed of the object is calculated based the filtered distance measurement samples.
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