| 摘要 |
A proximity signaling system and method are disclosed in which first and second transmitters are disposed on first and second mobile objects. The first and second transmitters generate first and second RF signals with first and second receiver addresses, respectively. A receiver is disposed remotely from the first and second transmitters. The receiver has a first and second microcontroller decoders for recognizing the first and second RF signals, respectively. The receiver has a gradual proximity display, such as a bar graph display, for indicating signal strength. The receiver also has first and second proximity alerts, such as lights, beepers, or voice chips, for signaling proximity of the first and second objects, respectively. In use, the first microcontroller decoder filters signals received by the receiver and passes only signals having the first receiver address along to the display and alerts. Similarly, the second microcontroller decoder filters signals received by the receiver and passes only signals having the second receiver address along to the display and alerts. A microphone may be incorporated into the receiver so that a user may record different custom messages for announcing the proximity of different approaching objects.
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