| 摘要 |
PURPOSE: A method for monitoring the ginseng farm by employing an earth magnetic field is provided to reduce the consumption of battery of the system and reduce the damage of the device. CONSTITUTION: A method for monitoring the ginseng farm by employing an earth magnetic field is characterized in that the sensibility of sensor is set in such a way that it is alarmed by only the metal possessed in the person, and it does not work if the metal is not possessed by the person. That is, the sensor does not work by an animal, snow, rain or the like. |
