| 摘要 |
<p>A means of locomotion (car 12, fig. 4) has an echo-based sensor for the surrounding environment in its front and rear bumpers (13, fig. 4). The device comprises a transducer 2 and an evaluating unit 3. The evaluating unit determines a similarity (X(T)) between a signal (e(I)) coming from the signal transducer (2) and an expected signal (s(T)), and also determines a relative measure (K(T)) of the similarity (X(T)) by the similarity (X(T)) being referred to a predefined reference quantity (X1i.) for the similarity (X(T)) such as their ratio, thereby normalizing the similarity. The result suppresses noise and interference, and takes into account the energy of the signals.</p> |
