| 摘要 |
Apparatus for detecting an object within a certain spacial area and for tracking it as the object moves. This is achieved by emitting a signal such as electro-magnetic radiation or ultrasound and by detecting the amount reflected back at two different points. By comparing the amount detected at each point it is possible to ascertain the direction of an object, point the detector at it and follow it if it moves. This can be used in the eyes of a doll, or in a toy weapons system, following someone around a room. |
