| 摘要 |
The device has an altitude band, and an antenna connected to an electronic assembly such as radio component and microprocessor, where the device is communicated with a decisional processed and collected information processing system. The antenna transmits, receives and processes radio waves to determine appearance or disappearance of a person, an animal or an object by addition, subtraction or any mathematical algorithm for changing a phase, amplitude or frequency level relative to presence or absence of the person, animal or object at different altitudes of solid, liquid or gaseous bodies. |
