| 摘要 |
In the speed-measuring device, a first signal (203) passes through a first link and a second signal (204) passes through a second link (205). The two signals and/or the propagation conditions for the two signals in the two links are chosen such that the propagation speeds of the two signals depend in a different way on the absolute speed. As a result, after passing through the two links, there is a phase difference between the two signals which depends on the absolute speed. From this phase difference, a component of the absolute speed is determined. <IMAGE>
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