| 摘要 |
This is a method, and apparatus for practicing such method, wherein motion of an object may be detected remotely and relative speed of the object may be detected wherein a transmitter having an antenna is attached to the object and changes in the collector current, due to changes in the impedance of the antenna, resulting from changing conditions of the object such as motion and speed, are detected, remotely, so as to indicate conditions of rest, motion, and speed of the object and wherein the change of the impedance, and collector current resulting therefrom, are functions of the motion and/or speed of the object.
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